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Category Archives: Transhuman News
Pro-Human Transhuman – TV Tropes
Posted: October 2, 2015 at 2:41 am
This character has been hit with a Viral Transformation, Emergency Transformation, become a cyborg, demon, magical creature, alien or discovers they were never human at all. Despite this, and regardless of any angst over What Have I Become?, they decide that rather than go down the path of Transhuman Treachery and be a Smug Super, Black Shirt, or The Quisling, they will do everything in their power to stay a part of humanity. And if their new species/transhuman fellows are anti-human, they will vow to protect humanity in a pseudo Faustian Rebellion. This can also include transhumans who cast themselves in a shepherd-like role for mankind. This doesn't include forcibly applying What Measure Is a Non-Super? to bootstrap humanity up, though. That's more of a Visionary Villain who believes Utopia Justifies the Means. Many Friendly Neighborhood Vampires fall in this category. If the transformation is due to The Virus, this requires copious Heroic Willpower. These characters can usually pull off a Sheep in Wolf's Clothing gambit. See also Monster Adventurers. Related to My Species Doth Protest Too Much, which refers to creatures that aren't former humans. Opposite Trope to Transhuman Treachery. Super Trope to Vampire Refugee and Phlebotinum Rebel. See also/compare A God I Am Not.
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Pro-Human Transhuman - TV Tropes
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Psoriasis Wikipdia
Posted: at 1:45 am
Un article de Wikipdia, l'encyclopdie libre.
Classification et ressources externes
Psoriasis en plaque dans le dos.
modifier
Le psoriasis (du grec ruption galeuse, psore ayant aussi autrefois dsign la gale en France) est une maladie inflammatoire de la peau[1] d'origine inconnue et non contagieuse. Cette affection dermatologique touche 1 3% de la population mondiale.
Dans sa forme bnigne et typique, le psoriasis se caractrise par des lsions rouges et squameuses du cuir chevelu, des genoux et des coudes, associe une atteinte des ongles. Dans les cas graves, l'atteinte cutane peut tre gnralise (rythrodermie) et il peut exister des atteintes des articulations. Cette dermatose volue de faon chronique avec des pousses entrecoupes de priodes de rmissions de dure variable au cours desquelles les lsions sont minimes. Aucun traitement permettant la gurison n'est connu; le traitement propos permet uniquement de contrler l'volution de la maladie, en permettant la rgression transitoire plus ou moins complte des lsions. Le traitement est adapt en fonction de la gravit et du retentissement sur la qualit de vie des patients.
Les causes prcises en sont inconnues bien que, dans prs de 30% des cas, une prdisposition familiale existe, surtout si des facteurs externes viennent se rajouter. La maladie aurait des composantes gntiques, auto-immunes[2], microbiologique et environnementale ou alimentaire (l'arrt de la consommation de produits laitiers ou certaines autres denres reviennent souvent dans les tmoignages de personnes ayant russi s'en dbarrasser sans faire intervenir un traitement en parallle[rf.ncessaire]).
L'piderme se renouvelle trop rapidement, en seulement quatre six jours, au lieu des trois semaines habituelles ce qui engendre des inflammations localises. Les cellules pidermiques s'accumulent la surface de la peau et forment une couche de pellicules blanches appeles squames. Parfaitement inoffensives, celles-ci ont pourtant le dsavantage d'tre inesthtiques. La prsence de nombreux leucocytes dans le derme a suggr le rle du systme immunitaire.
Comme indiqu prcdemment, il existe pour un petit tiers des personnes atteintes une composante familiale au psoriasis (restent dterminer les autres facteurs entrant en jeu): prs de 30% des patients atteints ont un membre de leur famille ayant galement la mme maladie[3]. Un certain nombre de gnes ont t identifis comme marqueurs potentiels de risque, dont le PSORS. Le plus important semble tre le PSORS1 situ sur le chromosome 6 et qui serait responsable de prs du tiers des psoriasis familiaux[4]. Seize gnes (en 2012[5]) ont des mutations pouvant favoriser cette maladie.
Les pousses de psoriasis sont parfois lies au stress. Elles peuvent aussi avoir pour origine un facteur infectieux (infection streptococcique, par exemple). Leur frquence est trs variable et, d'une manire gnrale, le facteur dclenchant de la pousse n'est pas identifiable. La consommation excessive d'alcool est un facteur d'aggravation du psoriasis.
Certains mdicaments exacerbent parfois le psoriasis mais leur arrt doit tre discut au cas par cas, celui-ci pouvant comporter d'autres risques, cardio-vasculaires en particulier. Ce sont essentiellement ceux de la classe des bta-bloquants. D'autres molcules ont t rapportes comme potentiellement aggravantes, avec un risque cependant moindre. Ce sont les sartans[6] et l'nalapril[rf.souhaite].
Au contraire, l'exposition solaire a un rle protecteur net. Durant la grossesse, une diminution des pousses avec une aggravation par contre la suite de celle-ci est gnralement observe. Le mcanisme invoqu est celui d'une immuno-modulation par les taux levs de progestrone et d'strognes qui entranent une stimulation de l'immunit dpendant des lymphocytes B mais une diminution de l'activit immunitaire des lymphocytes T. La progestrone est reconnue comme ayant un rle immuno-modulateur cl durant la grossesse[7].
Certaines formes peuvent se dvelopper la suite d'un traumatisme articulaire.
L'effet inesthtique handicapant le sujet dans sa vie quotidienne, peut s'avrer particulirement dsagrable galement par le biais de dmangeaisons intenses. Le grattage des lsions psoriasiques entrane des piquets hmorragiques dnomms signe d'Auspitz ou signe de la rose sanglante tudi par le dermatologue Heinrich Auspitz[10].
Lorsque le psoriasis s'tend sur les parties gnitales, les relations sexuelles deviennent plus dlicates car elles deviennent trs douloureuses.
Les porteurs de psoriasis auraient un risque plus grand de faire un infarctus du myocarde, d'autant plus que l'atteinte est tendue[11]. Les formes svres ont une mortalit cardio-vasculaire plus importante[12]. Cela pourrait tre en rapport avec une perturbation du mtabolisme lipidique constate chez les patients atteints de psoriasis[13] et avec l'inflammation chronique. Il existe galement une corrlation entre la svrit de la maladie cutane et le risque d'avoir un rtrcissement aortique[14].
Il existe galement un risque accru de survenue d'une insuffisance rnale[15].
Comme les victimes d'arthrite rhumatode, ils deviennent aussi plus sensibles la douleur, semble-t-il en raison d'une nociception renforce par une sorte d'effet de sensibilisation[16]
Elle se fait par pousses avec des rmissions (gurison apparente) plus ou moins compltes atteignant parfois quelques dizaines d'annes. Ou bien les pousses peuvent tre chroniques, disparaitre chaque t pour revenir en hiver.
Il peut galement ne jamais y avoir de rmission (sans traitements mdicamenteux): une fois arriv un certain niveau d'volution trs relatif suivant les individus, le psoriasis se stabilise et peut se maintenir ainsi des annes ou toute une vie.
L'examen au microscope d'un chantillon de peau atteinte n'est gure utile en pratique courante, l'examen clinique tant le plus souvent vident. Cet examen montre une augmentation de l'paisseur de l'piderme, la prsence de nombreux vaisseaux sanguins particulirement tortueux dans le derme avec infiltration dans ce dernier par des leucocytes.
En peau non atteinte, l'examen au microscope est strictement normal.
Le traitement local consiste appliquer une crme sur la zone du psoriasis. Les corticostrodes ont un effet favorable sur le psoriasis, malheureusement les plaques reviennent souvent ds l'arrt du traitement. Ce dernier engendre galement une forme d'insensibilisation, qui oblige augmenter les doses dans le temps. De plus, l'effet n'est plus seulement local si ces pommades sont appliqus sur de vastes zones. Cette forme de traitement devrait donc tre limite des formes aigus ou fortement inesthtiques, pendant une courte priode et sur une surface limite.
Le calcipotriol (calcipotrine) est un driv de la vitamine D3. Normalement, cette dernire est synthtise lors de l'exposition de la peau la lumire ultraviolette solaire. Il s'agit donc ici d'un substitut cette exposition (ou la puvathrapie). La quantit maximale applicable est cependant limite, car, fortes doses, le calcipotriol devient toxique. Le tazarotne est un driv de la vitamine A disponible en pommade. Sa tolrance serait cependant moindre que le calcipotriol[17].
Les goudrons (dont l'huile de cade) taient auparavant frquemment utiliss en application sur le psoriasis mais taient malcommodes car particulirement salissants. Le dithranol est un driv du goudron. Le dithranol a une certaine efficacit, surtout en association avec d'autres traitements mais il est parfois irritant et surtout incommode (trs "tachant"), ce qui en limite lusage.
Les autres traitements incluent l'acide salicylique, les bains, les hydratants de la peau. Ces traitements locaux peuvent tre ventuellement associs.
L'exposition solaire a le plus souvent une influence favorable sur le psoriasis[18],[19]. Cependant, dans 10% des cas, cette exposition sera en fait nfaste[rf.ncessaire]. Le sujet devra alors viter le soleil, ou du moins viter d'tre directement expos ses rayons.
La photothrapie aux ultraviolets B (UVB) est galement conseille, pouvant tre combine d'autres thrapies.
Dans tous les cas, la thrapie par ultra-violets (A ou B) doit tre effectue sous contrle mdical. Elle aboutit un seuil de tolrance variable d'un individu l'autre qu'il est ncessaire de ne pas dpasser. Sans cela le patient s'expose l'hliodermie et aux risques faibles de cancers cutans (pithlioma, mlanomes), risques d'autant plus faibles qu'un patient souffrant de psoriasis a beaucoup plus de contrles dermatologiques qu'un patient moyen, ce qui permet de dceler plus tt un dbut de noplasie.
Pour les formes les plus svres de psoriasis, les mdecins peuvent prescrire des traitements par voie orale (comprim ou glule) ou par injection. Ces traitements sont appels systmiques car les mdicaments sont censs se dissminer dans tout l'organisme. Ils ont souvent des effets secondaires, parfois srieux[21].
Le mthotrexate est un antagoniste d'une vitamine, l'acide folique. S'emploie encore surtout dans l'arthrite psoriasique, peu dans le psoriasis exclusivement cutan. Un rtinode, tel l'acitrtine, est un driv de synthse de la vitamine A pouvant tre prescrit dans les formes modres svres de psoriasis. Chez la femme en ge de procrer ce traitement est tratogne, non seulement pendant la prise du mdicament mais galement pendant les deux annes (24 mois) qui suivent la dernire prise. Les effets secondaires sont en gnral mineurs.
Le psoriasis tant considr proche des maladies auto-immunes, un immunodpresseur comme la ciclosporine peut parfois produire des effets positifs, mais ses effets secondaires sont importants (principalement en raison de l'affaiblissement du systme de dfense immunitaire). L'hydroxyure n'est quasi plus employe. L'alefacept, un anticorps dirig contre des rcepteurs de certains lymphocytes T, n'a plus sa place dans le traitement du psoriasis. L'infliximab est un anticorps monoclonal chimrique anti-TNF. Il s'administre en perfusion de 2 heures, aux semaines 0, 2 et 6, puis toutes les 8 semaines[21].
L'efalizumab est galement un anticorps monoclonal dirig contre un certain type de rcepteurs leucocytaires avec une efficacit court et moyen terme[8]. Il a t retir du march dbut 2009[21]. L'tanercept est un inhibiteur du TNF qui a une bonne efficacit sur l'atteinte cutane mais aussi articulaire du psoriasis[21],[22]. L'adalimumab est un anti-TNF administr en injection sous-cutane toutes les 2 semaines la dose de 40 mg[21].
D'autres mdicaments ou traitements ont t plus ou moins tests: le XP-828L (Dermylex) a prouv une certaine efficacit[23],[24]pour le psoriasis lger modr. De mme, plusieurs anticorps monoclonaux, dont l'ustekinumab[25], ou l'ixekizumab[26], dirigs contre certains types d'interleukines semble tre prometteur, voire plus efficace que l'etanercept[27].
Entre autres nouveaux traitements, la lcithine marine est en cours d'valuation et des rsultats positifs ont dj t publis[28],[29].
Le 23 septembre 2014, la Food and Drug Administration (FDA) a accord une autorisation de mise sur le march laprmilast (Otezla) chez les patients souffrant dun psoriasis en plaques modr svre candidats la photothrapie ou un traitement systmique[30].
Sa prvalence est variable suivant la couleur de la peau: elle est plus frquente chez les personnes de peau blanche, concerne entre 1 et 3% de la population[8] et atteint de manire quivalente les deux sexes.
Le psoriasis connat deux priodes propices: entre 10 et 20 ans et surtout entre 50 et 60 ans[31]. Pour se manifester, cette affection inflammatoire a besoin d'un terrain hrditaire et d'un facteur dclenchant. Si l'un des deux parents est atteint, le risque pour l'enfant de la dvelopper est de 5 10%.
L'une des premires descriptions prcises en a t faite par le britannique Robert Willan dans son trait des maladies de la peau datant de 1808. L'inventeur amricain Benjamin Franklin en souffrait[32]. L'crivain John Updike en a fait la description en voquant sa propre atteinte dans une nouvelle du recueil Problmes (1979).
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Psoriasis Wikipdia
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Remedy For Scalp Eczema, Dandruff and Seborrhoeic …
Posted: October 1, 2015 at 8:42 am
Scalp ezcema, seborrhoeic dermatititsand dandruff is a condition that plagues many people, young or old..
Scalp eczema can start in children as young as one year old and can continue well into adulthood. This is particularly distressing for the childs confidence and self-esteem. Other children who may not understand the condition may bully or make fun of the child; other parents, ignorant about it, may think its contagious and exclude the afflictedchild from their own kids social events. In addition, the parents may experience disapproving looks from other parents or adults who think Tut, tut that child is neglected by his/her parents. Why cant the parents do something about it?
The eczema produces reddened inflammed sores that periodically ooze, build up of dry scales, persistent itching, painful lesions, severe scarring and permanent damage to the hair follicles resulting in hair loss. It is not a pretty sight to see a young child walking around with patches of hair on their head.
Eczema is an illness caused by toxaemia not surprising given the amount of preservatives, hormones and additives in modern diet & processed foods. .
Children and adults who suffer from scalp eczema should have their hair treated like fine silk with utmost gentle care, using the simplest and most natural of regimes. Pre-disposition to eczema & seb derm tends to be genetic ad run through families. All it takes are the right sort of conditions (wrong hair care products or wrong sorts of food) to trigger flare ups.
When the right diet is adopted, including eliminating triggers, and the right sort of products are used, eczema and seborrhoeic dermatitis can be very well controlled.
Here are some of my recommendations
DONT..
DO .
To really get the benefits of the Scalp Therapy products, why not get the bundle of all the 4 products? It works out cheaper than buying the products individually. This way, you can wash your hair with the Hair Cleanser, then follow it up with the Calming Leaving Conditioner and for really dry hair/scalp, then use the Soothing Balm. In between washes, simply use Anti-Itch Spray with theSoothing Balm. These holistic, chemical-free products are all natural, so there are no artificial fillers to bulk out the products. This makes them so effective that a) you will only need to use a little at a time, which means they last so much longer and b) you will notice a very quick improvement to the condition of your hair & scalp. Oh yeah, and they ship worldwide for a flat rate too.
PS the products can be used from age 2 year old and upwards.
The products can also be used on ALL hair types and is suitable for both men and women.
Below is a picture of TLC Naturals Scalp Therapy Hair Products with the packaging update. The formulae and ingredients of the products they are so effective so why mess with a good thing I just wanted smarter looking bottles.
Here are the results of usingTLC Naturals Scalp Therapy Products on the hair of a white (caucasian man) who suffered from scalp eczema and seborrheic dermatitis
Pictures from left to right:
here are the results of usingTLC Naturals Scalp Therapy Products onthe hair of a black woman with natural who also experienced scalp problems, seb derm hair loss and slow growth.
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Remedy For Scalp Eczema, Dandruff and Seborrhoeic ...
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Some Ideas Regarding the Biological Colonization of The …
Posted: September 29, 2015 at 11:42 pm
1. INTRODUCTION
Far from being a purely theoretical science, Biology has many practical applications. This science will have a huge importance for the future of humanity. What can Biology bring to mankind? There are three main answers:
Health Biological sciences will play an important role in fighting various infectious agents (viruses, bacteria), in curing other diseases (cancer, for example) and in "repairing" wounded tissues, thus increasing peoples life expectancy.
Food Considering the rapid demographic growth, the traditional food sources will become insufficient for feeding Earths population. Biologists will have the duty to search for organisms that are more nourishing and easier to be cultivated (algae, crustaceans etc.), and also to improve the species already cultivated, in order to increase their productivity, their nutritiousness and their resistance to pests.
Space While the human demographical growth is unlimited, our planets resources are limited. Mankind will have to conquer and colonize the extraterrestrial space. We know that none of the planets in our Solar System has the natural conditions necessary to human colonization. The solution is to modify these conditions and to gradually implant terrestrial life forms on these planets, in order to create habitats for the future colonists.
This essay is regarding the latter subject.
The idea of implanting terrestrial life on other planets (a process called
This essay will treat the case of planet Mars, the closest, from all points of view, to Earth. Also, it will focus mostly on the biological aspects of terraformation.
2. MARS: PREMISES FOR TERRAFORMATION
A. Natural conditions
Mars belongs to the group of the luric planets, together with Mercury, Venus and Earth. From all the planets of the Solar System, it is situated at the shortest distance from Earth. Its diameter is slightly larger than half of our planets diameter. Its orbit is exterior to Earths orbit. The rotation period is of 24 hours and 40 minutes (a martian day is almost equal to a terrestrial one) and the duration of the revolution movement (the martian year) is 687 days. Mars has seasons, like our planet. Because the distance from the Sun is longer, Mars receives only 43% of the sunlight that reaches Earth. The gravitational force is 38% of the terrestrial one. The planet has no magnetic field and no tectonic activity. There is, instead, some volcanic activity.
The atmosphere is extremely rarefied, having a pressure of only 7.4-10
The average temperature is about -60C, but temperatures can vary between -75C and +25C, according to the latitude and season. By comparison, the average temperature on Earth is about +15C.
The quantity of ultraviolet radiations that reaches the surface of Mars is much larger than on Earth, being deadly for almost any life form.
The relief forms are inequaly distributed on the surface of the planet. The southern hemisphere has high altitudes, with many impact craters, volcanic mountains and three large depresions: Hellas, Argyre and Isidis (probably huge craters). The northern hemisphere has, predominantly, low altitudes. There are two polar caps composed of frozen water and carbon dioxide. There is no liquid water on the planets surface.
The upper layer of the martian crust, a few kilometers thick, is called regolith and is composed of rocks, dust and ice. It is, probably, porous (due to the low gravity). The entire planets surface is covered with a red dust.
The samples taken by the Mars Pathfinder mission from the surface, together with the analyses of several meteorites, of martian origin, show the following chemical composition:
Probably, the analyses must be redone for K2O and MnO2. This composition is similar to that of the terrestrial rocks, except for the iron compounds, much more abundant on Mars. In the primary rocks iron is found in its reduced form (Fe2+), and in the soil, in its oxidized form (Fe3+). The predominant minerals at the surface are haematite (Fe2O3), jarosite (KFe3(OH)6(SO4)2), goethite (FeO(OH)). It seems that the upper layer of the regolith contains oxidizing agents.
Apparently, the environmental conditions on Mars are improper to any living organisms. However, there are more and more evidence that indicate these conditions were not always the same. Most scientists think that, in the past, there was liquid water on Mars and, obviously, the temperatures were higher and the atmosphere was denser. This poses a problem: where and why most of the martian atmosphere disappeared? There are two theories. One of them says that the planet lost its atmosphere due to violent impacts with other celestial bodies (comets, asteroids). In this case the atmospheric gases were lost in space and trying to recompose the martian atmosphere would be almost impossible with our current technical means. The second theory says that the atmosphere was slowly eroded, during geological eras, by the solar wind, after the volcanic activity slowed down, causing the atmospheric gases to stop recycling. This way, most of the gases would have infiltrated, under various forms, into the martian crust. If this theory is true, there is a big chance that the planets atmosphere could be modified, allowing the implantation of life on Mars.
B. Resources for terraformation
Planet Mars has, under various forms, all the chemical elements necessary to life.
Water
The most obvious water reserves on Mars are located in the polar caps. According to some estimations, these contain around 5,000 km3 of water (equivalent to a 4 cm layer on the entire planets surface).
It seems that other water reserves exist in some stratified deposits (alternate layers of dust and ice) in the territories around the caps.
Apparently, there are, in the regolith, in the regions situated north and south of 40 latitude (North and, respectively, South), ice lenses (somehow similar to the terrestrial permafrost).
Squires and Carr (1986) estimated the total water quantity in the caps and regolith to the equivalent of a 13-100 m thick layer of liquid water on the entire planet.
Also, liquid water is supposed to exist in the lithosphere. Wittome says that the regolith, due to its porous structure, allowed water to infiltrate. This means that in the regions situated at more than 40 latitude, at a few kilometers depth, there sholud be thermal waters, at very high pressures. A recent model of the hydrological cycle on Mars (Clifford, 1993), shows that in the lower areas of the planet, there could be subterranean waters, at artesian pressures. Also, some minerals should contain water.
Carbon
It is known that the polar caps contain solid carbon dioxide. Some of this sublimates during the martian summer and solidifies in the winter, causing variations of the caps area. Initially, it was thought that most of the southern cap was made of CO2 (estimated to the equivalent of 10-100 mbar of gaseous CO2). However, recent data show that this cap is composed mostly of water.
Also, it is estimated that the regolith contains large amounts of CO2. Zent et al. mentioned the equivalent of 30-40 mbar, while other estimations indicate as much as 300 mbar. Some chemical tests showed that the martian regolith is capable of absorbing large quantities of CO2.
On Mars, carbon is also found in carbonates (of calcium, iron, magnesium etc.). It was observed the existence of layered deposits (calcium carbonate sediments). It is supposed that these are located in former lakes and evaporation basins. Such deposits were also discovered in Valles Marineris (a huge canyon system). Based on the low value of the Ca/Si ratio in the regolith, Warren (1987) says that there are large amounts of CaCO3 on Mars (there is only a little calcium in the regolith because most of it is concentrated in carbonates). According to some estimations, the carbonate reserves should contain the equivalent of 30 mbar of gaseous CO2. The presence of CO2 is extremely important for modifying the environmental conditions on Mars, as it will be shown below.
Nitrogen
Nitrogen is a vital element for every organism, being an important part of the composition of proteins, nucleic acids and other organic substances. The quantity of this element on Mars is unknown. This poses a big problem to those interested in the possibility of terraforming the planet. The atmospheric dinitrogen quantity is very small (2.7% of the atmosphere). Still it is preconized the existence of substantial amounts of nitrates in the regolith (according to some estimations, the equivalent of 300 mbar of gaseous N2), in former evaporation basins from the equatorial regions, together with the presence of underground ammonia deposits. Analyses done on martian basaltic meteorites show that these contain an amuont of nitrates and phosphates larger than the terrestrial basaltic rocks (scientists tried the experimental cultivation of some plants on soils containing martian meteoritic rocks, with spectacular results). Generally, it is accepted that there are important nitrate reserves on Mars, but their quantity is unknown.
Organic matter
Some specialists think there are some organic material deposits located at 3-40 meters below the planets surface (Bullock et al., 1994) or in the polar zones (Bada and McDonald, 1995).
In space, large amounts of organic compounds (especially hydrocarbons) are found in celestial bodies called carbonaceous chondrites (meteorites, asteroids, satellites). Still, it appears that on the planets surface there are no organic substances. This fact is probably due to the strong oxidizing agents in the upper layer of the regolith, that quickly oxidized the hydrocarbons, forming CO2. That is why, if there really is organic material on Mars, it should be found buried in the regolith. Also, the two natural satellites of the planet, Phobos and Deimos, belong to the carbonaceous chondrite class.
Recently, the Mars Express probe discovered some methane emissions of unknown origin.
Other elements
According to spectrometric analyses, sulphur is found in the martian "soil" in 10-100 times higher concentrations than on Earth. It is found in the form of sulphates (like jarosite), extremelly abundant on Mars. On Earth, large reserves of sulphur compounds are associated with volcanic activity.
Spectrometric analyses for phosphorus could not be effectuated, but it is thought that this is abundant, as the composition of martian meteorites show.
Other elements, like iron, manganese, potassium etc., exist in large quantities on Mars.
Additional chemical and mineralogical analyses are needed in order to know the exact quantities and locations of the various substances necessary to ecopoiesis.
C. Conditions necessary to life
To the proper going of metabolic activities of terrestrial organisms, envinronmental temperatures higher than 0C are required, although there are organisms that can resist for a long time at negative temperatures. It is known that during the martian summer, in the equatorial regions, temperatures can grow up to +25C, but this is not enough.
Generally the atmospreric pressure should be higher than 10 mbar, although some plants and anaerobic bacteria can withstand pressures below one millibar. The partial pressure of CO2 must exceed 0.15 mbar (on Mars, it is much higher than this limit). O2 partial pressure must be higher than 1 mbar. Many anaerobic and even aerobic microorganisms can grow in pure CO2 atmospheres. Some cyanobacteria and algae like Cyanidium sp. or Scenedesmus sp. produce, by photosynthesis, the oxygen needed for their respiration and, in the dark periods, they become anaerobic (Seckbach, 1970). It was found out that in the cyanobacterial and algal colonies grown at high CO2 concentrations will appear mutants that require larger and larger concentrations of this gas (Spalding et al., 1983; Marcus et al., 1986). This way mutants could be selectionated for colonizing Mars. Plants need, for photosynthesis, 20-210 mbar of O2 (mythochondrial enzymes need oxygen) but can be adapted to as little as la 0.1 mbar. Nitrogen fixing bacteria can begin their activity at 5-10 mbar of N2. The solar light that received by Mars is more than sufficient for photosynthesis.
For humans, requirements are much higher. The atmosphere must have a mass three times larger than the terrestrial one, in order to compensate the low gravity. The atmospheric pressure must exceed 500 mbar (on Earth it is around 1,013 mbar, at the sea level). CO2 partial pressure needs to be below 10 mbar (otherwise, it becomes toxic). O2 pressure must be between 130 and 300 mbar (too little oxygen causes hypoxia, too much, causes combustion). Additionally 300 mbar of buffer-gas are needed. This is necessary to prevent combustion, due to the presence of O2 in the atmosphere. The ideal buffer-gas is N2 (on Earth, it constitutes more than three quarters of the atmosphere), but, between certain limits, it can be replaced by He, Ar, Ne, Kr,Xe, CH4, H2O, CO, HCN, SF6.
3. ECOPOIESIS
The terraformation of a planet has two stages. The first stage was called by specialists ecopoiesis or ecosynthesis and its finality is the implantation of the first life forms on the planet and the creation of self-regulating anaerobic ecosystems. The second stage is the true terraformation and consists of creating an aerobic biosphere that will allow humans to colonize the planet.
As shown above, the main factors that prevent life implantation on Mars are too low atmospheric pressure, too low temperatures, lack of a protection against ultraviolet radiation, lack of liquid water on the planets surface. For all these problems there is only one solution: greenhouse effect.
The greenhouse effect is based on the property of certain gases (called greenhouse gases) to retain the solar heat reflected by the planets surface. The solar radiation directly heats the surface. Without greenhouse gases, a large part of the resulting heat would be lost in space. The greenhouse gases absorb it, heat the atmosphere, the atmosphere heats furthermore the planetary crust and the cycle goes on.
The best-known greenhouse gas is CO2. This constitutes most of the martian atmosphere, but it is insuficient because of the low atmospheric pressure (although it appears that, indeed, Mars is going through a warming process). Still, as shown above, CO2 is, probably, quite abundant on Mars, either as carbonic ice or as carbonate deposits.
Ecopoiesis on Mars could be realized by a human mechanical intervention that would produce a chain reaction. An artificial heating would release CO2, that, through the greenhouse effect, would release other quantities of CO2, H2O (water vapor is a greenhouse gas), maybe NH3 etc.
Several mathematical models of a greenhouse effect on Mars were done. One of them, created by McKay et al., show that an artificial temperature growth of only 4C could sustain a chain reaction, causing the southern polar cap to completely melt down (an initial 25C impulse would be needed). The release of 800 mbar CO2 in the atmosphere would bring the average temperature on the planet to 250 K (-25C), compared to the actual 213 K (-60C). Releasing 2 bar CO2 would increase the temperature to 273 K (0C), and 3 bar CO2, to 280 K. The last estimations of the southern caps composition infirm the presence of such large amounts of CO2, but the model remains valid. The sublimation of the CO2 from the polar caps would be followed by the release of this gas from the regolith (where CO2 is more abundent than in the caps). An additional 10C increase is required (Zubrin, McKay), producing a chain reaction. Other amounts of CO2 can be released from the carbonate reserves, using more aggressive methods, as shown below.
Even if McKays previsions would prove to be too optimistic, temperatures on Mars would still increase enough to allow the colonization of terrestrial organisms. The presence, in the atmpsphere, of several hundred millibars of CO2 would have many effects. First, the total atmospheric pressure would increase to acceptable values. Then, the atmospheric temperature would increase, allowing the existence (temporary or even permanent) of liquid water, at least in the equatorial regions. Finally, an ozone layer would appear and it would absorb most of the deadly radiations that reach the surface. In the upper layers of the atmosphere, under the action of ultraviolet radiation, carbon dioxide, goes through a simple splitting reaction, producing ozone.
Linda and James Graham show that all that life needs in order to be implanted on Mars is 90-300 mbar CO2 and 2 mbar O3 (for protection against radiation). These objectives are perfectly realizable.
If the theory of ecopoiesis, shown above, is rather simple, its practical realization is more problematic. Several solutions were proposed:
A. Orbital mirrors
The artificial heating of the polar caps and of the regolith could be done by placing large mirrors on the planets orbit. These would reflect the sunlight towards certain areas on the planet (especially the southern cap), triggering the greenhouse effect.
A mirror with a diameter of 20 meters was already placed in orbit around Earth in the 1980s (the "Znamia" project) in order to illuminate Russias northern territories during the polar night. It is preconized the launch, in the next future, of a mirror of 200 meters in diameter, with the same purpose. Most of the specialists say that a mirror that would heat enough the southern cap must have at least 125 kilometers in diameter (and a mass of about 200,000 tons). It would be built of aluminized mylar. The technology for building it is known, being the same as for producing the "solar sails" (that, in the future, will be used for the propulsion of spaceships). Its ideal location would be a stationary one, at the equilibrium point between the solar winds force and the planets gravitation.
Building such a mirror is not such a big problem (it would be the equivalent of Earths aluminium production for five days) but transporting it to the martian orbit is. Perhaps it should be built of small modules or replaced with many small mirrors. Using simultaneously more heating methods would greatly reduce the mirror's necessary dimensions.
B. Nuclear explosions
Using nuclear weapons to release carbon dioxide seems to be a easier solution for our current technological possibilities. Also, this would, finally, give Earths huge atomic arsenals a real utility for mankind.
Nuclear warheads could be used in two ways. First, they could be detonated at the planets surface, in the polar zones, in order to melt the caps. According to some estimations, it would be sufficient if, during four martian years (about seven terrestrial years), at the beginning of each martian spring, a nuclear warhead of 20 kilotons (thus, not a very powerful one) would be detonated in a dusty area near the southern cap, for the entire cap to melt. This would cumulate the direct effects of the explosions heat with the creation of dust storms that would cover the cap, reducing its albedo (this aspect will be discussed below). Probably, these estimations are too optimistic, but the idea is valid.
Second, subterranean nuclear explosions could be used to release greenhouse gases (CO2 and water vapor) from the carbonate deposits and from the "permafrost". Detonating nuclear warheads in nitrate deposits would release N2 and O2.
This solution is criticized for two main aspects. The first is the quantity of radiations that would appear after the explosions and that would make vast regions of the planet inhospitable to life. Yet, there are many ways of reducing the radioactive contamination. Using thermonuclear warheads (based on hydrogen fusion), that produce less radiations than fission weapons and detonating them, mostly, underground, would limit the afffected area. Also, it sould be considered the fact that terraformation would be a long process that will take, probably, tens of thousands of years. In this time, radioactivity would be greatly reduced, so that the future human colonists would not be affected. The second aspect, more problematic, is the number of nuclear warheads needed, which, according to some estimations, would be to big compared to the available atomic weapons.
C. Greenhouse gas production
Another solution is the artificial enrichment of the martian atmosphere in greenhouse gases. There are greenhouse gases much more efficient than carbon dioxide: halocarbons, ammonia, methane. Releasing these in the atmosphere in sufficient quantities would heat the planet and would sublimate the carbon dioxide, triggering the chain reaction necessary to ecopoiesis.
Halocarbons
Chlorofluorocarbons (CFC), responsible of destroying the ozone layer on Earth, are extremely strong greenhouse gases. It is estimated that a very small concentration of CFC, of one part in a million, would be enough to heat the atmosphere with 60C.
Yet, they are useless on Mars, for two reasons. First, they would destroy the ozone layer, the only defense against radiations. Second, ultraviolet radiations photolise CFC. The life of CFC would be very short (estimations indicate something between a few days and several tens of years) and they should be produced continously.
Releasing these gases in the martian atmosphere would mean their production in situ and, thus, the existence on Mars of the necessary industrial instalations. The main problem is finding raw materials. Fluorine can be extracted from minerals like apatite and fluorite and then, in reaction with atmospheric CO2 would form PFC. It was calculated that, in order to release a quantity of halocarbons sufficient for raising the temperature by 5C, an energy of around 1,315 MW is needed, equal to that produced by an ordinary nuclear power plant (Zubrin, McKay).
Ammonia
Ammonia is a strong greenhouse gas. It is unlikely that it could be produced, in short time and in sufficient quantities, on Mars. It could be "imported" from other regions of the Solar System. Comets and some asteroids contain large amounts of ammonia.
Deviating these celestial bodies towards Mars would be a problem. Although not far from the planets orbit there is a large asteroid belt, it would be easier that asteroids containing NH3 to be brought from the regions beyond Pluto, because their revolution speed is lower and they are easier to deviate. Some of the ammonia that they contain could be used for propulsion. It was calculated that for transporting an asteroid of 10 billion tons (2.6 kilometers in diameter) constituted entirely of NH3 and situated at a distance of 12 astronomical units, four 5,000 MW thermonuclear propellers (tested since the 1960s) would be enough. These would heat the asteroid, sublimating 8% of the ammonia quantity and using it for propulsion.
The transport would take ten years and would increase the temperature on Mars by 3C. In order to avoid causing great damage to the planet, the asteroid should not be crashed directly into the planets surface, but aerobraked.
Yet, the practical realisation of such transports would be quite difficult at the current technological level. Also, it is extermely improbable that an asteroid would be formed entirely of ammonia. Known asteroids and comets do not contain more than 10% ammonia.
Methane
Methane can be, in theory, "imported" from the Solar System, just like ammonia.
Finding a hydrogen source for this reaction would be problematic.
D. Using thermal waters
As shown above, the martian regolith is porous, due to the low gravitational force and, thus, permeable to water. This caused liquid water (which in the past was, probably, abundant on Mars) to infiltrate at various depths in the planets crust. Water temperature and pressure are high at great depths. Wittome says that at 6 km depth there should be water reserves at 300C. Also, colder water should exist at one kilometer depths, in the regions beyond 40 of latitude, especially in the Tharsis zone and, maybe, in Valles Marineris. If Cliffords model was correct, the lowlands (mostly in the northern hemisphere) could have accesible subterranean waters.
In order to exploit these water reserves, drilling is required. Thermal waters could be used in many ways. They could be transported by pipelines to the ice deposits in the regolith contributing to their melting and releasing CO2. Acidified thermal waters could be used for dissolving carbonate deposits, forming CO2, and nitrate deposits, forming N2 and O2.
Due to its enormous pressure, water could be let to flush in the atmosphere, vaporizing itself (because of its high temperature and low atmospheric pressure) and coming back at the surface as snow. Due to impurities contained by subterranean water, this snow would have a darker colour and, if it falls on the polar caps, it would help reducing their albedo and melting them.
Thermal waters could be used for producing the electricity needed by other installations necessary to ecopoiesis (drills, PFC factories etc.).
Finally, if thermal waters were directed to the bottom of a crater or of a depression in the crust, a lake would appear. These lakes would be covered by an ice crust and, below it, liquid water. If such lakes were located in the equatorial regions, it would be possible that, during the summer, they would not be frozen. In these lakes, living organisms could be introduced, preparing them for the moment when the natural conditions at the surface would be suitable to life. There are cyanobacteria and unicellular algae that can grow and photosynthesize even under thin ice crusts. Various chemosynthesizing organisms could grow in these lakes. The existence of artificial thermal springs would favorize the growth of microorganisms, such as methanogen bacteria, that prefere this kind of habitats and that would produce methane, a strong greenhouse gas.
The main problem for exploiting thermal waters is that of transporting to Mars and keeping in function installations like drills, pipelines, power generators etc. There are quite many such devices needed for obtaining significant results. Knowing the exact location of the subterranean water reserves is also necessary.
E. Reducing the albedo
The word "albedo" means the amount of light reflected by a certain body. A low albedo means that the body absorbs more solar radiation and, thus, it heats more. The martian ice caps reflect much solar light. If their surface was covered with darker substances, their albedo would decrease and the ice would heat, allowing the carbon dioxide to sublimate.
The easiest way of doing so is by creating dust storms. As shown above, the planets surface is covered by a red dust (it is red because of the iron oxides). The red dust would cover areas of the polar caps, helping them to melt.
Furthermore, dust storms would have another importance for ecopoiesis. It was observed that the distribution of the small ozone quantity in the martian atmosphere varies with the season and latitude (Lindner, 1988). These variations can be as large as 40%. During the first stages of ecosynthesis, until a sufficiently thick ozone layer would be formed, these variations would let entire regions of the planet without protection against ultraviolet radiations. Dust storms, not only would help the chemical process of forming ozone, but would absorb themselves part of the radiations.
As shown above, reducing the albedo could also be done with the "dirty" snow produced by using thermal waters.
Another possibility would be reducing the general albedo of the planet. This way, Mars would absorb more solar radiations and the whole atmosphere would become warmer. This could be done by covering large areas of the martian surface with dark substances (such as hydrocarbons). As shown above, it is possible that, at various depths in the regolith, hydrocarbons would be found. However, locating and extracting them would pose big technical problems. Furthermore, their quantity is unknown and neither their lifespan in the oxidizing environment at the regoliths surface.
It would be more economical to use the planets natural satellites. These have relatively small dimensions (they are probably former asteroids) and belong to the carbonaceous chondrites class, containing ice and black rocks, rich in hydrocarbons. Temperature at their surface is around 313 K (40C). Phobos has 22 kilometers in diameter. Its revolution speed around the planet is very high. Its orbit is continously closening to the planet and, in the far future, it will crash into Mars. Deimos has only 12.6 kilometers in diameter and a much lower revolution speed. Deviating and disintegrating these satellites in the martian atmosphere, using powerful nuclear explosions, would cover large territories with dark organic material. The impact of large satellite fragments (that, as shown above, have a high temperature) with the planets surface would release certain amounts of CO2 from the regolith, ausing, this way, a slight global warming.
The resulting organic material could become food for heterotrophic microorganisms, either under this form, either as intermediary products resulted after their oxidation by the regolith (salts of the acetic, oxalic, benzenocarboxilic acids etc.).
Pure carbon (black) can be obtained by reacting carbon dioxide with hydrogen, using, as catalyzers, iron, rubidium etc.:
Again, the problem is finding a hydrogen source.
These would be the main solutions for modifying the natural conditions on Mars. Of course, many other ones were proposed. For example, building small human colonies (isolated from the environment) and developing industrial activities capable of realising ecopoiesis. These colonies would also have artificial biospheres where organisms could be prepared for colonizing the planet. However this would take a long time and would pose technical problems.
Another idea would be building satellites that would receive solar energy and send it to the polar caps under another form (laser, microwaves).
As one could observe, for each of the solutions shown above, the technical requirements are relatively large. They would be reduced by using more, or even all of these methods, simultaneously. This way, the orbital mirrors needed would be smaller, so as the number of the nuclear warheads, of the drilling installations, or the amount of artificially produced greenhouse gases.
When can ecopoiesis start? As soon as possible, strictly depending of the technical means. When it would be over? There are various estimations. Generally, it is thought that one hundred years, or even less, would be enough for the first anaerobic ecosystems to be installed on Mars. After introducing the first organisms, the global warming due to human intervention, would continue until the martian atmosphere would have an acceptable pressure and temperature for superior organisms, including humans.
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what is a genome? give some example.? | Yahoo Answers
Posted: September 28, 2015 at 10:42 pm
Best Answer: The genome includes both the genes and the non-coding sequences of the DNA.More precisely, the genome of an organism is a complete genetic sequence on one set of chromosomes; for example, one of the two sets that a diploid individual carries in every somatic cell. The term genome can be applied specifically to mean that stored on a complete set of nuclear DNA (i.e., the "nuclear genome") but can also be applied to that stored within organelles that contain their own DNA, as with the mitochondrial genome or the chloroplast genome. The genome of a diploid organism including eukarya refers to a full set of chromosomes or genes in a gamete; thereby, a regular somatic cell contains two full sets of genomes. In haploid organisms, including bacteria, archaea, viruses, and mitochondria, a cell contains only a single set of the genome, usually in a single circular or contiguous linear DNA (or RNA for retroviruses). In modern molecular biology the genome of an organism is its hereditary information encoded in DNA (or, for retroviruses, RNA).
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genome | genetics | Britannica.com
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an international collaboration in which researchers aimed to sequence the genomes of a large number of people from different ethnic groups worldwide with the intent of creating a catalog of genetic variations occurring with a frequency of at least 1 percent across all human populations. A major goal of the project was to identify more than 95 percent of variations known as single nucleotide...
...of a phosphoryl group). The specific location of a given chemical modification can also be important. For example, certain histone modifications distinguish actively expressed regions of the genome from regions that are not highly expressed. These modifications may correlate with chromosome banding patterns generated by staining procedures common in karyotype analyses. Similarly,...
The development of the technology to sequence the DNA of whole genomes on a routine basis has given rise to the discipline of genomics, which dominates genetics research today. Genomics is the study of the structure, function, and evolutionary comparison of whole genomes. Genomics has made it possible to study gene function at a broader level, revealing sets of genes that interact to impinge on...
study of the structure, function, and inheritance of the genome (entire set of genetic material) of an organism. A major part of genomics is determining the sequence of molecules that make up the genomic deoxyribonucleic acid (DNA) content of an organism. The genomic DNA sequence is contained within an organisms chromosomes, one or more sets of which are found in each cell of an organism. The...
The genome of HIV mutates at a very high rate, and the virus in each infected individual is thus slightly different. The genetic mechanisms that underlie the individual variation have been investigated through approaches based on genome sequencing. The HIV-1 genome in 2009 was the first HIV genome to be sequenced in its entirety. Prior to that achievement, the ability of HIV RNA to fold into...
New work on genome sequences, the total amount and quality of all of the genes that make up a live being, permits more accurate assessment of the material basis of the theoretically smallest and simplest extant free-living organisms. The complete DNA sequences of a few extremely small free-living organisms are now knowne.g., Mycoplasma genitalium with its 480 genes. All the...
type of life cycle that takes place when a bacteriophage infects certain types of bacteria. In this process, the genome (the collection of genes in the nucleic acid core of a virus) of the bacteriophage stably integrates into the chromosome of the host bacterium and replicates in concert with it. No progeny viruses are produced. Instead, the infecting virus lies dormant within the bacteriums...
an alteration in the genetic material (the genome) of a cell of a living organism or of a virus that is more or less permanent and that can be transmitted to the cells or the viruss descendants. (The genomes of organisms are all composed of DNA, whereas viral genomes can be of DNA or RNA.) Mutation in the DNA of a body...
Salamanders have enormous genomes that contain more nucleic acid and larger chromosomes in each cell than any tetrapods. The genomes vary greatly in size among species, even within a family. Large genomes impose large cell size, which means that small salamanders have relatively few cells. The apparent anatomic simplicity of salamanders may be a direct and phylogenetically secondary outcome.
The nucleic acids of virions are arranged into genomes. All double-stranded DNA viruses consist of a single large molecule, whereas most double-stranded RNA viruses have segmented genomes, with each segment usually representing a single gene that encodes the information for synthesizing a single protein. Viruses with single-stranded genomic DNA are usually small, with limited genetic...
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Home – Complete GenomicsComplete Genomics
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Complete Genomics is a leader in whole human genome sequencing based in Mountain View, California. Using its proprietary sequencing instruments, chemistry, and software, the company has sequenced more than 20,000 whole human genomes. The companys mission is to improve human health by providing researchers and clinicians with the core technology and commercial systems to understand, prevent, diagnose, and treat diseases and conditions.
Over the past three years, Complete Genomics has initiated a large number of clinical utility studies designed to demonstrate thatpatients, payers, and physicians may be better off with a whole genome sequence as compared to standard of care. We have engaged key opinion leaders around the world to explore this question. While these studies cover many different clinical areas, three examples of the outcomes in autism, intellectual delay, and the lifetime benefit of whole genome sequencing are illustrated in these short videos.
Complete Genomics is now previewing its first commercial product, the Revolocity system. Unlike other providers who focus on providing only sequencing equipment, Complete Genomics has designed the Revolocity system to be a total end-to-end genomics solution for large-scale, high-quality genomes.
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Atopic dermatitis: MedlinePlus Medical Encyclopedia
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SKIN CARE AT HOME
Daily skin care may cut down on the need for medicines.
To help you avoid scratching your rash or skin:
Keepyour skin moist by using ointments (such as petroleum jelly), creams, or lotions 2 to 3 times a day. Choose skin products that do not contain alcohol, scents, dyes, and other chemicals. A humidifier to keep home air moist will also help.
Avoid things that make symptoms worse, such as:
When washing or bathing:
MEDICATIONS
At this time, allergy shots are not used to treat atopic dermatitis.
Antihistamines taken by mouth may help with itching or allergies. You can often buy these medicines without a prescription.
Atopic dermatitis is usually treated with medicines placed directly on the skin or scalp. These are called topical medicines:
Wet-wrap treatment with topical corticosteroids may help control the condition, but may lead to an infection.
Other treatments that may be used include:
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History of Art: Art of the 20th Century – Futurism,Jack of …
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Futurism
In contrast with other early 20th-century avant-garde movements, the distinctive feature of Futurism was its intention to become involved in all aspects of modem life. Its aim was to effect a systematic change in society and, true to the movement's name, lead it towards new departures into the "future". Futurism was a direction rather than a style. Its encouragement of eccentric behaviour often prompted impetuous and sometimes violent attempts to stage imaginative situations in the hope of provoking reactions. The movement tried to liberate its adherents from the shackles of 19th-century' bourgeois conventionality and urged them to cross the boundaries of traditional artistic genres in order to claim a far more complete freedom of expression. Through a barrage of manifestos that dealt not only with various aspects of art, such as painting, sculpture, music, architecture, and design, but with society in general, the Futurists proclaimed the cult of modernity and the advent of a new form of artistic expression, and put an end to the art of the past. The entire classical tradition, especially that of Italy, was a prime target for attack, while the worlds of technology, mechanization, and speed were embraced as expressions of beauty and subjects worthy of the artist's interest.
Futurism, which started out as a literary movement, had its first manifesto (signed by Filippo Tommaso Marinetti) published in Le Figaro in 1909. It soon attracted a group of young Italian artists - Umberto Boccioni, Giacomo Balla (1871-1958), Carlo Carra (1881-1966), Luigi Russolo (1885-1947), and Gino Severini (1883-1966) - who collaborated in writing the "Technical Manifesto of Futurist Painting" and the "Manifesto of the Futurist Painters", both of which were published in 1910.
Despite being the sole Italian avant-garde movement. Futurism first came to light in Paris where the cosmopolitan atmosphere was ready to receive and promote it. Its development coincided with that of Cubism, and the similarities and differences in the philosophies of the two movements have often been discussed. Without doubt they shared a common cause in making a definitive break with the traditional, objective methods of representation. However, the static quality of Cubism is evident when compared with the dynamism of the Futurists, as are the monochrome or subdued colours of the former in contrast to the vibrant use of colour by the latter. The Cubists' rational form of experimentation, and intellectual approach to the artistic process, also contrasts with the Futurists' vociferous and emotive exhortations for the mutual involvement of art and life, with expressions of total art and provocative demonstrations in public. Cubists held an interest in the objective value of form, while Futurists relied on images and the strength of perception and memory in their particularly dynamic paintings. The Futurists believed that physical objects had a kind of personality and vitality of their own. revealed by "force-lines" - Boccioni referred to this as "physical transcendentalism". These characteristic lines helped to inform the psychology and emotions of the observer and influenced surrounding objects "not by reflections of light, but by a real concurrence of lines and real conflicts of planes" (catalogue for the Bernheim-Jeune exhibition, 1911). In this way, the painting could interact with the observer who, for the first time, would be looking "at the centre of the picture" rather than simply viewing the picture from the front. This method of looking at objects that was based on their inherent movement - and thereby capturing the vital moment of a phenomenon within its process of continual change - was partly influenced by a fascination with new technology and mechanization. Of equal importance, however, was the visual potential of the new-found but flourishing art of cinematography. Futurists felt strongly that pictorial sensations should be shouted, not murmured. This belief was reflected in their use of very flamboyant, dynamic colours, based on the model of Neo-Impressionist theories of the fragmentation of light. A favourite subject among Futurist artists was the feverish life of the metropolis: the crowds of people, the vibrant nocturnal life of the stations and dockyards, and the violent scenes of mass movement and emotion that tended to erupt suddenly. Some Futurists, such as Balla, chose themes with social connotations, following the anarchic Symbolist tradition of northern Italy and the humanitarian populism of Giovanni Cena.
The first period of Futurism was an analytical phase, involving the analysis of dynamics, the fragmentation of objects into complementary shades of colour, and the juxtaposition of winding, serpentine lines and perpendicular straight lines. Milan was the centre of Futurist activity, which was led by Boccioni and supported by Carra and Russolo. These three artists visited Paris together in 1911 as guests of Severini, who had settled there in 1906. During their stay, they formulated a new artistic-language, which culminated in works dealing with the "expansion of objects in space" and "states of mind" paintings. A second period, when the Futurists adopted a Cubistic idiom, was known as the synthetic phase, and lasted from 1913 to 1916.
At this time, Boccioni took up sculpture, developing his idea of "sculpture of the environment" which heralded the "spatial" sculpture of Moore, Archipenko, and the Constructivists. In Rome, Balla and Fortunato Depero (1892-1960) created "plastic complexes", constructions of dynamic, basic silhouettes in harsh, solid colours. The outbreak of World War I prompted many Futurist artists to enlist as volunteers. This willingness to serve was influenced by the movement's doctrine, which maintained that war was the world's most effective form of cleansing. Both Boccioni and the architect Antonio Sant'Elia, who had designed an imaginary Futurist city, were killed in the war and the movement was brought to a sudden end.
During the 1920s, some Futurists attempted to revive the movement and align it with other European avant-garde movements, under the label of "Mechanical Art". Its manifesto, published in 1922. showed much in common with Purism and Constructivism. Futurism also became associated with "aeropainting" a technique developed in 1929 by Balla, Benedetta, Dottori, Fillia, and other artists. This painting style served as an expression of a desire for the freedom of the imagination and of fantasy.
Futurism
(Encyclopaedia Britannica)
Italian Futurismo, Russian Futurizm, early 20th-century artistic movement that centred in Italy and emphasized the dynamism, speed, energy, and power of the machine and the vitality, change, and restlessness of modern life in general. The most significant results of the movement were in the visual arts and poetry.
Futurism was first announced on Feb.20, 1909, when the Paris newspaper Le Figaro published a manifesto by the Italian poet and editor Filippo Tommaso Marinetti (q.v.). The name Futurism, coined by Marinetti, reflected his emphasis on discarding what he conceived to be the static and irrelevant art of the past and celebrating change, originality, and innovation in culture and society. Marinetti's manifesto glorified the new technology of the automobile and the beauty of its speed, power, and movement. He exalted violence and conflict and called for the sweeping repudiation of traditional cultural, social, and political values and the destruction of such cultural institutions as museums and libraries. The manifesto's rhetoric was passionately bombastic; its tone was aggressive and inflammatory and was purposely intended toinspire public anger and amazement, to arouse controversy, and to attract widespread attention. Painting and sculpture
With the support of Marinetti, the painters Umberto Boccioni, Carlo Carr, Luigi Russolo, Giacomo Balla, and Gino Severini published several manifestos on painting in 1910. Like Marinetti, they glorified originality for its own sake and despised inherited traditions of art. Although they were not as yet working in what was to become the Futurist style, theybegan to emphasize an emotional involvement in the dynamics of modern life, and toward this end they called for rendering the perception of movement and communicating to the viewer the sensations of speed and change. To achieve this, the Futurist painters adopted the Cubist technique of depicting several sides and views of an object simultaneously by means of fragmented and interpenetrating plane surfaces and outlines. But the Futurists additionally sought to portray the object's movement in space, and they tried to achieve this goal by rhythmic spatial repetitions of the object's outlines during its transit, producing an effect akin to that obtained by making multiple and sequential photographic exposures of a moving object. The Futurist paintings differed from Cubist ones in other important ways. While the Cubists favoured still life and portraiture, the Futurists preferred such subjects as speeding automobiles and trains, racing cyclists, dancers, animals, and urban crowds in movement. The resulting paintings had brighter and more vibrant colours than Cubist works and revealed dynamic, agitated compositions in which rhythmically swirling forms reached crescendos of violent movement.
Boccioni also became interested in sculpture, publishing a manifesto on the subject in the spring of 1912. Soon afterward, he began working in this medium, creating the highly original Development of a Bottle in Space (1912) and Unique Forms of Continuity in Space (1913). Antonio Sant'Elia formulated a Futurist manifesto on architecture in 1914. His visionary drawings of highly mechanized cities and boldly modern skyscrapers of the future prefigure some of the most imaginative 20th-century architectural planning. Sant'Elia was killed in action in 1916 during World War I.
Boccioni, who had been the most talented artist in the group, also died during military service in 1916. This event, combined with dilution of the group's daring as a result of expansion of its personnel and the coming of war, brought an end to the Futurist movement as an important historical force in the visual arts.
Literature
After his initial broad manifesto of 1909, Marinetti wrote or had a hand in creating a whole series of manifestos dealing with poetry, the theatre, architecture, and other arts. He founded the journal Poesia at Paris in 1905, and he later founded a press with the same name to publish Futurist works. On proselytizing visits to England, France, Germany, and Russia, Marinetti influenced the work of the English founder of Vorticism, Wyndham Lewis, and the French poet Guillaume Apollinaire.
In Russia the Marinetti visit took root in a kind of Russian Futurism that went beyond its Italian model in a revolutionary social and political outlook. Marinetti influenced the two Russian writers considered the founders of Russian Futurism, Velimir Khlebnikov (q.v.), who remained a poet and a mystic, and the younger Vladimir Mayakovsky (q.v.), who became the poet of the Revolution and the popular spokesman of his generation. The Russians published their own manifesto in December 1912, entitled Poshchochina obshchestvennomu vkusu (A Slap in the Face of Public Taste), which echoed the Italian manifesto of the previous May. The Russian Futurists repudiated Aleksandr Pushkin, Fyodor Dostoyevsky, and Leo Tolstoy and the then-current Russian symbolist verse and called for the creation of new techniques of writing poetry. Both the Russian and the Italian Futurist poets discarded logical sentence construction and traditional grammar and syntax; they frequently presented an incoherent string of words stripped of their meaning and used for their sound alone. As the first group of artists to identify wholeheartedly with the Bolshevik Revolution of 1917, the Russian Futurists sought to dominate post-Revolutionary culture and create a new art that would be integrated into all aspects of daily life of a revolutionary culture. They were favoured by Anatoly Lunacharsky, the first Soviet commissar of education, and given important cultural posts. But the Russian Futurists' challenging literary techniques and their theoretical premises of revolt and innovation proved too unstable a foundation upon which to build a broader literary movement. The Futurists' influence was negligible by the time of Mayakovsky's death in 1930.
Luigi Russolo (1885-1947)
Luigi Russolo Music
(b Portogruaro, Venice, 7 May 1885; d Cerro di Laveno, Lake Maggiore, 4 Feb 1947).
Italian painter, printmaker, writer and composer. The fourth of five children, he was trained in music by his father, who was a clockmaker and organist. In 1901 he went to Milan to join his family, who had moved there so that his two brothers, Giovanni and Antonio, could study music at the conservatory. Diverging from his fathers inclinations, Luigi was attracted towards other forms of art, especially painting. Though not actually enrolled at the Accademia di Brera, through new friends he indirectly followed the ideas taught there. In the same period he worked for the restorer Crivelli in Milan, serving his apprenticeship working on the interior decorations of the Castello Sforzesco and on Leonardos Last Supper in the refectory of S Maria delle Grazie. In December 1909 he took part in the exhibition Bianco e nero at the Famiglia Artistica in Milan, contributing a series of etchings, made during the preceding year, which show a definite leaning towards Symbolist forms and images. The undulating quality of the line in such etchings as his portrait of Nietzsche (c. 1909; Milan, Gal. A. Mod.), which seems to translate a musical rhythm into visual form through a strong, enveloping sign, remained a distinctive and individual feature of Russolos work and poetics, especially in his Futurist work.
Luigi Russolo Revolt 1911
Luigi Russolo Dinamismo di un treno 1912
Umberto Boccioni, Carlo Carr, Luigi Russolo, Giacomo Balla, Gino Severini
TO THE YOUNG ARTISTS OF ITALY!
The cry of rebellion which we utter associates our ideals with those of the Futurist poets. These ideals were not invented by some aesthetic clique. They are an expression of a violent desire which boils in the veins of every creative artist today.
We will fight with all our might the fanatical, senseless and snobbish religion of the past, a religion encouraged by the vicious existence of museums. We rebel against that spineless worshipping of old canvases, old statues and old bric-a-brac, against everything which is filthy and worm-ridden and corroded by time. We consider the habitual contempt for everything which is young, new and burning with life to be unjust and even criminal.
Comrades, we tell you now that the triumphant progress of science makes profound changes in humanity inevitable, changes which are hacking an abyss between those docile slaves of past tradition and us free moderns, who are confident in the radiant splendor of our future.
We are sickened by the foul laziness of artists, who, ever since the sixteenth century, have endlessly exploited the glories of the ancient Romans.
In the eyes of other countries, Italy is still a land of the dead, a vast Pompeii, whit with sepulchres. But Italy is being reborn. Its political resurgence will be followed by a cultural resurgence. In the land inhabited by the illiterate peasant, schools will be set up; in the land where doing nothing in the sun was the only available profession, millions of machines are already roaring; in the land where traditional aesthetics reigned supreme, new flights of artistic inspiration are emerging and dazzling the world with their brilliance.
Living art draws its life from the surrounding environment. Our forebears drew their artistic inspiration from a religious atmosphere which fed their souls; in the same way we must breathe in the tangible miracles of contemporary lifethe iron network of speedy communications which envelops the earth, the transatlantic liners, the dreadnoughts, those marvelous flights which furrow our skies, the profound courage of our submarine navigators and the spasmodic struggle to conquer the unknown. How can we remain insensible to the frenetic life of our great cities and to the exciting new psychology of night-life; the feverish figures of the bon viveur, the cocette, the apache and the absinthe drinker?
We will also play our part in this crucial revival of aesthetic expression: we will declare war on all artists and all institutions which insist on hiding behind a faade of false modernity, while they are actually ensnared by tradition, academicism and, above all, a nauseating cerebral laziness.
We condemn as insulting to youth the acclamations of a revolting rabble for the sickening reflowering of a pathetic kind of classicism in Rome; the neurasthenic cultivation of hermaphodic archaism which they rave about in Florence; the pedestrian, half-blind handiwork of 48 which they are buying in Milan; the work of pensioned-off government clerks which they think the world of in Turin; the hotchpotch of encrusted rubbish of a group of fossilized alchemists which they are worshipping in Venice. We are going to rise up against all superficiality and banalityall the slovenly and facile commercialism which makes the work of most of our highly respected artists throughout Italy worthy of our deepest contempt.
Away then with hired restorers of antiquated incrustations. Away with affected archaeologists with their chronic necrophilia! Down with the critics, those complacent pimps! Down with gouty academics and drunken, ignorant professors!
Ask these priests of a veritable religious cult, these guardians of old aesthetic laws, where we can go and see the works of Giovanni Segantini today. Ask them why the officials of the Commission have never heard of the existence of Gaetano Previati. Ask them where they can see Medardo Rossos sculpture, or who takes the slightest interest in artists who have not yet had twenty years of struggle and suffering behind them, but are still producing works destined to honor their fatherland?
These paid critics have other interests to defend. Exhibitions, competitions, superficial and never disinterested criticism, condemn Italian art to the ignominy of true prostitution.
And what about our esteemed specialists? Throw them all out. Finish them off! The Portraitists, the Genre Painters, the Lake Painters, the Mountain Painters. We have put up with enough from these impotent painters of country holidays.
Down with all marble-chippers who are cluttering up our squares and profaning our cemeteries! Down with the speculators and their reinforced-concrete buildings! Down with laborious decorators, phony ceramicists, sold-out poster painters and shoddy, idiodic illustrators!
These are our final conclusions:
With our enthusiastic adherence to Futurism, we will:
1.Destroy the cult of the past, the obsession with the ancients, pedantry and academic formalism.
2. Totally invalidate all kinds of imitation.
3. Elevate all attempts at originality, however daring, however violent.
4. Bear bravely and proudly the smear of madness with which they try to gag all innovators.
5. Regard art critics as useless and dangerous.
6. Rebel against the tyranny of words: Harmony and good taste and other loose expressions which can be used to destroy the works of Rembrandt, Goya, Rodin...
7. Sweep the whole field of art clean of all themes and subjects which have been used in the past.
8. Support and glory in our day-to-day world, a world which is going to be continually and splendidly transformed by victorious Science.
The dead shall be buried in the earths deepest bowels! The threshold of the future will be swept free of mummies! Make room for youth, for violence, for daring!
FUTURIST SCULPTURE
Umberto Boccioni published his "Technical Manifesto of Futurist Sculpture" in 1912, despite having completed only two sculptural works at the time. He had developed his new theories after coming into contact with Duchamp-Villon, Archipenko, Brancusi, and Picasso while in Paris. Boccioni's ambition was to make sculpture capable of expressing the dynamic structures of modern society. To this end, he aimed to capture the totality of reality, including psychological and emotional dimensions, and all its varied facets in their continual condition of change. The resultant work would be "sculpture of environment", in which he could "fling open the figure and let it incorporate within itself whatever may surround it".
The Cubists had already tried a fresh approach to reality, interrupting the continuity of line and breaking up the rhythm of forms according to analytical and geometric conceptions. However, they did not alter the static perception of reality. Futurists aimed to convey all the changes that an object undergoes during movement. After demonstrating the sculptural motion of an everyday object in his famous "bottles" series (Development of a Bottle in Space, 1912), Boccioni tackled the theme of movement in the human body, constructing aerodynamic, compressed compositions with a succession of concave and convex shapes. By stretching and distorting his figures, he created "syntheses" of "internal plastic infinity" and "external plastic infinity", as seen in his Unique Forms of Continuity in Space (1913). The most conclusive work of Boccioni's sculptural experimentation was his inspired composition Horse + rider + buildings (1913-14). The materials chosen for this work, including wood, tin. copper, and cardboard, represented the need to progress from traditional sculpture made in a single material to the use of a multiplicity of colours and materials. Picasso's assemblage of various materials for his sculptures in 1911 and 1912 had already started to change the course of plastic art in Europe. The Horse (1914) by Duchamp-Villon showed a remarkable affinity with Boccioni's work, which was also discernible in Lipchitz's solid three-dimensional structures, and in Constructivist works.
I. Avant-garde sculpture (190920)
(Encyclopaedia Britannica)
In the second decade of the 20th century the tradition of body rendering extending from the Renaissance to Rodin was shattered, and the Cubists, Brancusi, and the Constructivists emerged as the most influential forces. Cubism, with its compositions of imagined rather than observed forms and relationships, had a similarly marked influence.
One of the first examples of the revolutionary sculpture is Picasso's Woman's Head (1909). The sculptor no longer relied upon traditional methods of sculpture or upon his sensory experience of the body; what was given to his outward senses of sight and touch was dominated by strong conceptualizing. The changed and forceful appearance of the head derives from the use of angular planar volumes joined in a new syntax independent of anatomy. In contrast to traditional portraiture, the eyes and mouth are less expressive than the forehead, cheeks, nose, and hair. Matisse's head of Jeanette (191011) also partakes of a personal reproportioning that gives a new vitality to the lessmobile areas of the face. Likewise influenced by the Cubists' manipulation of their subject matter, Alexander Archipenko in his Woman Combing Her Hair (1915) rendered the body by means of concavities rather than convexities and replaced the solid head by its silhouette within which there is only space.
Brancusi also abandoned Rodin's rhetoric and reduced the body to its mystical inner core. His Kiss (1908), with its twoblocklike figures joined in symbolic embrace, has a concentration of expression comparable to that of primitive art but lacking its spiritualistic power. In this and subsequentworks Brancusi favoured hard materials and surfaces as wellas self-enclosed volumes that often impart an introverted character to his subjects. His bronze Bird in Space became a cause clbre in the 1920s when U.S. customs refused to admit it duty free as a work of art.
Raymond Duchamp-Villon began as a follower of Rodin, but his portrait head Baudelaire (1911) contrasts with that by his predecessor in its more radical departure from the flesh; the somewhat squared-off head is molded by clear, hard volumes. His famous Horse (1914), a coiled, vaguely mechanical form bearing little resemblance to the animal itself, suggests metaphorically the horsepower of locomotive drive shafts and, by extension, the mechanization of modern life. Duchamp-Villon may have been influenced by Umberto Boccioni, one of the major figures in the Italian Futurist movement and a sculptor who epitomized the Futurist love of force and energy deriving from the machine. In Unique Forms of Continuity in Space and Head + House + Light (1911), he carried out his theories that the sculptor should model objects as they interact with their environment, thus revealing the dynamic essence of reality.
Jacques Lipchitz came to Cubism later than Archipenko and Duchamp-Villon, but after mastering its meaning he produced superior sculpture. In 1913, after several years of conservative training, he made a number of small bronzes experimenting with the compass curve and angular planes. They reveal an understanding of the Cubist reconstitution of the bodies in an impersonal quasi-geometric armature over which the artist exercised complete autonomy. Continuing towork in this fashion, he produced Man with a Guitar, and Standing Figure (1915), in which voids are introduced, while in the early 1920s he developed freer forms more consistently based on curves.
Lehmbruck's mature style emerged in the Kneeling Woman(1911) and Standing Youth (1913), in which his gothicized, elongated bodies with their angular posturings and appearance of growing from the earth give expression to his notions of modern heroism. In contrast to this spiritualized view is his The Fallen (191516), intended as a compassionate memorial for friends lost in the war.
Constructivism and Dada
Between 1912 and 1914 there emerged anantisculptural movement, called Constructivism, that attacked the false seriousness and hollow moral ideals of academic art. The movement began with the relief fabrications of Vladimir Tatlin in 1913. The Constructivists and their sympathizers preferred industrially manufactured materials, such as plastics, glass, iron, and steel, to marble and bronze. Their sculptures were not formed by carving, modelling, and casting but by twisting, cutting, welding, or literally constructing: thus the name Constructivism.
Unlike traditional figural representation, the Constructivists' sculpture denied mass as a plastic element and volume as an expression of space; for these principles they substitutedgeometry and mechanics. In the machine, where the Futurists saw violence, the Constructivists saw beauty. Like their sculptures, it was something invented; it could be elegant, light, or complex, and it demanded the ultimate in precision and calculation.
Seeking to express pure reality, with the veneer of accidental appearance stripped away, the Constructivists fabricated objects totally devoid of sentiment or literary association; Naum Gabo's work frequently resembled mathematical models, and several Constructivist sculptures,such as those by Kazimir Malevich and Georges Vantongerloo, have the appearance of architectural models. The Constructivists created, in effect, sculptural metaphors for the new world of science, industry, and production; their aesthetic principles are reflected in much of the furniture, architecture, and typography of the Bauhaus.
A second important offshoot of the Cubist collage was the fantastic object or Dadaist assemblage. The Dadaist movement, while sharing Constructivism's iconoclastic vigour, opposed its insistence upon rationality. Dadaist assemblages were, as the name suggests, assembled from materials lying about in the studio, such as wood, cardboard, nails, wire, and paper; examples are Kurt Schwitters' Rubbish Construction (1921) and Marcel Duchamp's Disturbed Balance (1918). This art generally exalted the accidental, the spontaneous, and the impulsive, giving free play to associations. Its paroxysmal and negativist tenor led its subscribers into other directions, but Dadaism formed the basis of the imaginative sculpture thatemerged in the later 1920s.
Conservative reaction (1920s)
In the 1920s modern art underwent a reaction comparable to the changes experienced by society as a whole. In the postwar search for security, permanence, and order, the earlier insurgent art seemed to many to be antithetical to these ends, and certain avant-garde artists radically changed their art and thought. Lipchitz' portraits of Gertrude Stein (1920) and Berthe Lipchitz (1922) return volume and features to the head but not an intimacy of contact with the viewer. Tatlin and Alexander Rodchenko broke with the Constructivists around 1920. Jacob Epstein developed some of his finest naturalistic portraiture in this decade. Rudolph Belling abandoned the mechanization that had characterized his Head (1925) in favour of musculature and individual identity in his statue of Max Schmeling of 1929. Matisse's reclining nudes and the Back series of 1929 show less violently worked surfaces and more massive and obvious structuring.
Aristide Maillol continued refining his relaxed and uncomplicated female forms with their untroubled, stolid surfaces. In Germany, Georg Kolbe's Standing Man and Woman of 1931 seems a prelude to the Nazi health cult, andthe serene but vacuous figures of Arno Breker, Karl Albiker, and Ernesto de Fiori were simply variations on a studio theme in praise of youth and body culture. In the United States adherents of the countermovement included William Zorach, Chaim Gross, Adolph Block, Paul Manship, and Wheeler Williams.
II. Sculpture of fantasy (192045)
One trend of Surrealist or Fantasist sculpture of the late 1920s and the 1930s consisted of compositions made up of found objects, such as Meret Oppenheim's Object, Fur Covered Cup (1936). As with Dadaist fabrications, the unfamiliar conjunction of familiar objects in these assemblies was dictated by impulse and irrationality and could be summarized by Isidore Ducasse's often-quoted statement, Beautiful . . . as the chance meeting on a dissecting table of a sewing machine with an umbrella.
Of greater artistic importance was the sculpture of a second group that included Alberto Giacometti, Jean Arp, Lipchitz, Henry Moore, Barbara Hepworth, Picasso, Julio Gonzlez, andAlexander Calder. Although these sculptors were sometimes in sympathy with Surrealist objectives, their aesthetic and intellectual concerns prohibited a more consistent attachment. Their art, derived from visions, hallucinations, reverie, and memory, might best be called the sculpture of fantasy. Giacometti's Palace at 4 A.M., for example, interprets the artist's vision not in terms of the external public world but in an enigmatic, private language. Moore's series of Forms suggest shapes in the process of forming under the influence of each other and the medium of space. The appeal of primitive and ancient ritual art to Moore, the element of surprise in children's toys for Calder, and the wellsprings of irrationality from which Arp and Giacometti drank were for these men the means by which wonder and the marvelous could be restored to sculpture. While their works are often violent transmutations of life, their objectives were peaceful, . . . to inject into the vain and bestial world and its retinue, the machines, something peaceful and vegetative. ([Jean] Hans Arp, On My Way, Documents of Modern Art, vol. 6, p. 123, George Wittenborn, Inc., New York, 1948.)
Other sculpture (192045)
The sculpture of Moore, Gaston Lachaise, and Henri Laurens during the 1920s and '30s included mature, ripe human bodies, erogenic images reminiscent of Hindu sculpture, appearing inflated with breath rather than supported by skeletal armatures. Lachaise's Montagne (193435) and Moore's reclining nudes of the '30s and '40s are identifications with earth, growth, vital rhythm, and silent power. Prior to Moore and the work of Archipenko, Boccioni, and Lipchitz, space had been a negative element in figure sculpture; in Moore's string sculptures and Lipchitz' transparencies of the 1920s, it became a prime element of design.
Lipchitz' figure style of the late 1920s and '30s is inseparable from his emerging optimistic humanism. His concern with subject matter began with the ecstatic Joy of Life (1927). Thereafter his seminal themes were of love and security and assertive passionate acts that throw off the inertia of his Cubist figures. In the Return of the Prodigal Son (1931), for example, strong, facetted curvilinear volumes weave a pattern of emotional and aesthetic accord between parent and child.
The American sculptor John B. Flannagan rendered animal forms as well as the human figure in a simple, almost naive style. His interest in what he called the profound subterranean urges of the human spirit in the whole dynamiclife process, birth, growth, decay and death (quoted in Carl Zigrosser, Catalog for the Exhibition of the Sculpture of John B. Flannagan, p. 8, The Museum of Modern Art, New York, 1942) resulted in Head of a Child (1935), New One (1935), Not Yet (1940), and The Triumph of the Egg (1941).
Somewhat more mystical are Brancusi's Beginning of the World (1924), Fish (192830), and The Seal (1936). As with Flannagan, the recurrent egg form in Brancusi's art symbolizes the mystery of life. Nature in motion is the subject of Alexander Calder's mobiles, such as Lobster Trapand Fish Tail (1939) and others suggesting the movement of leaves, trees, and snow. In the history of sculpture there is no more direct or poetic expression of nature's rhythm.
Developments after World War II
The modern artist is the counterpart in our time of the alchemist-philosopher who once toiled over furnaces, alembics and crucibles, ostensibly to make gold, but who consciously entered the most profound levels of being, philosophizing over the melting and mixing of various ingredients (Ibram Lassaw, quoted by Lawrence Campbell in Art News, p. 66, The Art Foundation Press, New York, March 1954). While work in the older mediums persisted, it was the welding, soldering, and cutting of metal that emerged after 1945 as an increasingly popular medium for sculpture. The technical and expressive potential of uncast metal sculpturewas carried far beyond the earlier work of Gonzlez and Picasso.
The appeal of metal is manifold. It is plentifully available from commercial supply houses; it is flexible and permanent; it allows the artist to work quickly; and it is relatively cheap compared to casting. Industrial metals also relate modern sculpture physically, aesthetically, and emotionally to its context in modern civilization. As the American sculptor David Smith has commented, Possibly steel is so beautiful because of all the movement associatedwith it, its strength and functions. Yet it is also brutal, the rapist, the murderer and death-dealing giants are also its offspring (quoted in Garola Giedion-Welcker, ContemporarySculpture, Documents of Modern Art, vol. 12, p. 123, George Wittenborn, Inc., New York, 1955).
The basic tool of the metal sculptor is the oxyacetylene torch, which achieves a maximum temperature of 6,500 F (3,600 C; the melting point of bronze is 2,000 F). The intensity and size of the flame can be varied by alternating torch tips. In the hands of a skilled artist the torch can cut or weld, harden or soften, colour and lighten or darken metal. Files, hammers, chisels, and jigs are also used in shaping themetal, worked either hot or cold. The sculptor may first construct a metal armature that he then proceeds to conceal or expose. He builds up his form with various metals and alloys, fusing or brazing them, and may expose parts or the whole to the chemical action of acids. This type of work requires constant control, and many sculptors work out and guard their own recipes.
Other sculptors such as Peter Agostini, George Spaventa, Peter Grippe, David Slivka, and Lipchitz, who were interested in bringing spontaneity, accident, and automatism into play, returned to the more labile media of wax and clay, with occasional cire-perdue casting, which permit a very direct projection of the artist's feelings. By the nature of the processes such work is usually on a small scale.
A number of artists brought new technique and content to theDadaist form of the assemblage. Among the most important was the American Joseph Cornell, who combined printed matter and three-dimensional objects in his intimately sealed, often enigmatic boxes.
Another modern phenomenon, seen particularly in Italy, France, and the United States, was the revival of relief sculpture and the execution of such works on a large scale, intended to stand alone rather than in conjunction with a building. Louise Nevelson, for example, typically employed boxes as container compartments in which she carefully disposed an assortment of forms and then painted them a uniform colour. In Europe the outstanding metal reliefs were those by Alberto Burri, Gio and Arnaldo Pomodoro, Csar, Zoltn Kemny, and Manuel Rivera.
Development of metal sculpture, particularly in the United States, led to fresh interpretations of the natural world. In the art of Richard Lippold and Ibram Lassaw, the search for essential structures took the form of qualitative analogies. Lippold's Full Moon (194950) and Sun (195356; commissioned by the Metropolitan Museum of Art, New York City, to hang in its room of Persian carpets) show an intuition of a basic regularity, precise order, and completeness that underlies the universe. Lassaw's comparable interest in astronomical phenomena inspired his Planets (1952) and The Clouds of Magellan (1953).
In contrast to the macrocosmic concern of these two artists were the interests of sculptors such as Raymond Jacobson, whose Structure (1955) derived from his study of honeycombs. Using three basic sizes, Jacobson constructed his sculpture of hollowed cubes emulating the modular, generally regular but slightly unpredictable formal quality ofthe honeycomb.
Isamu Noguchi's Night Land is one of the first pure landscapes in sculpture. David Smith's Hudson River Landscape (1951), Theodore J. Roszak's Recollections of the Southwest (1948), Louise Bourgeois's Night Garden (1953), and Leo Amino's Jungle (1950) are later examples.
In the 1960s a number of sculptors, particularly in the United States, began to experiment with using the natural world as a kind of medium rather than a subject. Among the more notable examples were the American Robert Smithson, who frequently employed earth-moving equipment to alter natural sites, and the Bulgarian-born Christo, whose wrappings of both natural and man-made structures in synthetic cloth generated considerable controversy. The name environmental sculpture has come to denote such works, together with other sculptures that constitute self-contained environments.
The human figure since World War II
Since figural sculpture moved away from straightforward imitation, the human form has been subjected to an enormous variety of interpretations. The thin, vertical, Etruscan idol-like figures developed by Giacometti showed his repugnance toward rounded and smooth body surfaces orstrong references to the flesh. His men and women do not exist in felicitous concert with others; each form is a secret sanctum, a maximum of being wrested from a minimum of material. Reg Butler's work (e.g., Woman Resting [1951]) and that of David Hare (Figure in a Window [1955]) treat the body in terms of skeletal outlines. Butler's figures partake of nonhuman qualities and embody fantasies of an unsentimental and aggressive character; the difficulties andtensions of existence are measured out in taut wire armatures and constricting malleable bronze surfaces. Kenneth Armitage and Lynn Chadwick, two other British sculptors, make the clothing a direct extension of the figure, part of a total gesture. In his Family Going for a Walk (1953), for example, Armitage creates a fanciful screenlike figure recalling wind-whipped clothing on a wash line. Both Chadwick and Armitage transfer the burden of expression from human limbs and faces to the broad planes of the bulk of the sculpture. Chadwick's sculptures are often illusive hybrids suggesting alternately impotent De Chirico-like figures or animated geological forms.
Luciano Minguzzi admired the amply proportioned feminine form. Minguzzi's women (e.g., Woman Jumping Rope [1954]) may exert themselves with a kind of playful abandon. Marini's women (e.g., Dancer [1949]) enjoy a stately passivity, their quiescent postures permitting a contrapuntal focus on the graceful transition from the slender extremities to the large, compact, voluminous torso, with small, rich surface textures.
The segmented torso, popular with Arp, Laurens, and Picasso earlier, continued to be reinterpreted by Alberto Viani, Bernard Heiliger, Karl Hartung, and Raoul Hague. The emphasis of these sculptors was upon more subtle, sensuous joinings that created self-enclosing surfaces. Viani's work, for example, does not glorify body culture or suggest macrocosmic affinities as does an ideally proportioned Phidian figure; his torsos are seen in a private way, as in his Nude (1951), with its large body and golf ball-sized breasts.
Among the most impressive figure sculptures made in the United States in the late 1950s were those by Seymour Lipton. Their large-scale, taut design and provocative interweaving of closed and open shapes restore qualities of mystery and the heroic to the human form.
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July 2014 New World Order RFID CHIP INTO BRAIN - Last days end times news prophecy update https://www.youtube.com/watch?v=1eGxn...
July 2014 Breaking News United Nations & China Plans New Currency A De Americanized World https://www.youtube.com/watch?v=THO6n...
July 2014 Breaking News President Barack Obama Plans for USA citizens Gun Confiscation https://www.youtube.com/watch?v=v26Vc...
July 2014 Final Hour New World Order Last days end times News bible prophecy update https://www.youtube.com/watch?v=JnDip...
July 2014 Final Hour New World Order end times Last days news bible prophecy update 2 of 5 https://www.youtube.com/watch?v=rsGdw...
July 2014 Bible Prophecy Russia military current events Last Days End times News update https://www.youtube.com/watch?v=8g7Sa...
July 2014 Martial Law Lock Down Never forget 1 Million US citizens Last days End Times News https://www.youtube.com/watch?v=TH-VN...
2014 July Breaking News Final Hour CHRISLAM interfaith prayer Pope Francis Israel & Palestine https://www.youtube.com/watch?v=6hDF0...
July 2014 Breaking News Chem Trails HAARP Exposed Mind Control Military Weather Manipulation NASA https://www.youtube.com/watch?v=5hZtH...
2014 July Breaking News HAARP Exposed Mind Control Military Weather Manipulation NASA Last days https://www.youtube.com/watch?v=WvAvs...
2014 July Breaking News World War 3 not if but when Last days end times news prophecy update https://www.youtube.com/watch?v=CoIix...
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2014 August Breaking News Mixing Human DNA with Animal DNA ...
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