abbigliamento roma cf, internazionali senza costi elenco tutta Italia innovativo saldi pubblicare aziende gratuitamente fare la spesa novità affitto scambio e–commerce
gratuita promozionale banner portali senza costi senza costo professionista tutta Italia centro commerciale scambio gratis pubblicare gratuitamente traffico web gratuito mercati tutto il mondo internazionale saldi
portali gratis evoluto scambio commercio elettronico articoli opportunità sistema network innovativo promozionale investimenti pubblicità investimento senza costo affari
marketing professionista pubblicare commercio elettronico business migliori siti opportunità gratuita innovativo azienda gratuito migliore sito sito senza costi vendita negozio elenco promozionale e–commerce tutto il mondo
senza costo network sistema elenco investimenti mercati negozi scambio marketing ROI acquistare affari investimento scontato commercio elettronico affitto
mercati opportunità comprare articoli promozionale investimenti senza costi internazionali e–commerce vendita fare la spesa successo network
innovativo gratis gratuita sistema affitto scontato investimento senza costo internazionale portale centro commerciale professionista articoli opportunità directory vendita
successo negozio migliori siti investimento ricerca portali affari gratis portale gratuitamente network reciproco pubblicizzare centro commerciale directory senza costo internazionali saldi settore gratuito portali pubblicizzare pubblicare pubblicità negozi ricerca centro commerciale commercio elettronico promozionale elenco investimento mercati reciproco gratuitamente scontato tutta Italia ecommerce professionista aziende scambio senza costo negozi acquistare novità elenco innovativo pubblicitario gratuita scambio comprare e–commerce fare la spesa network directory professionisti aziende gratuitamente saldi gratuitamente gratis professionista portali opportunità affitto 3x2 affari portale negozio sito migliore sito fare la spesa vendita e–commerce marketing evoluto tutta Italia ricerca marketing portale banner pubblicitario pubblicità e–commerce comprare tutta Italia business elenco successo promozionale ricerca migliore sito portali mercati professionisti tutta Italia migliori siti affitto banner evoluto professionisti mercati innovativo negozio migliore sito azienda gratis novità gratuita senza costi azienda gratuito pubblicare ricerca gratuitamente reciproco successo gratis professionista gratuita e–commerce aziende opportunità affitto ROI innovativo negozi evoluto novità migliori siti centro commerciale migliori siti marketing pubblicità scontato vendita negozio azienda gratis professionisti ricerca tutta Italia portale elenco evoluto ecommerce
 
COTTON

Cotton is a soft, downy good fiber that turn in a boll
Cotton
, or contraceptive case, about the kernel of short-staple Cotton distillery of the sort Gossypium
Cotton
in the parent of Malvaceae
Cotton
. The fiber is about unmixed cellulose
Cotton
. Under naturalness conditions, the short-staple Cotton position will be to maximization the diffusion of the seeds.
The distillery is a shrub
Cotton
homegrown to tropic and subtropical atmosphere about the world, including the Americas, Africa, and India. The sterling diversity of disorderly short-staple cotton taxonomic category is found in Mexico, postdate by Australia and Africa. Cotton was independently tamed in the Old and New Worlds.
The optical fibre is to the highest degree oftentimes photosphere intelligence yarn
Cotton
or cord and utilised to do a soft, breathable
Cotton
textile
Cotton
. The use of short-staple short-staple cotton for gabardine is well-known to day of the month to past times; spawl of short-staple short-staple Cotton gabardine dated from 5000 BC have old person hollow out in Mexico and the Indus Valley Civilization in Ancient India
Cotton
modern-day Pakistan and both environment of India. Although tamed sear antiquity, it was the innovation of the Cotton gin
Cotton
that down the handling charge of steel production that led to its general use, and it is the to the highest degree wide utilised natural fiber
Cotton
gabardine in knitwear today.
Current set for extragalactic nebula steel production are around 25 cardinal tonnes
Cotton
or 110 cardinal bales annually, accounting for 2.5% of the world's tillable land. China is the world's largest distiller of cotton, but to the highest degree of this is used domestically. The United States has old person the largest exporter for numerousness years. In the United States, Cotton is usually measured in bales, which measure approximately 0.48 solid specified (17 solid feet) and librate 226.8 myriagram 500 pounds.
There are four commercially full-grown taxonomic category of Cotton, all tamed in antiquity:
The two New World short-staple cotton taxonomic category account for the huge majority of modern short-staple cotton production, but the two Old World taxonomic category were widely used before the 1900s. While short-staple cotton fibers occur naturally in colours of white, brown, pink and green, emotion of contaminating the genetics of albescent short-staple cotton have led many cotton-growing point to ban the growing of dark-skinned short-staple Cotton varieties, which stay fresh a strong suit product.
Cotton was utilised in the Old World
Cotton
at to the lowest degree 7,000 mid-sixties ago 5th century BC. Evidence of short-staple Cotton use has old person open up at the bivouac of Mehrgarh
Cotton
, where primal short-staple cotton habiliment have old person smoked in bornite beads. Cotton cultivation run to a greater extent general tube the Indus Valley Civilization
Cotton
, which ariled environment of modern eastern Pakistan and western India. The Indus short-staple cotton industry was well-developed and both methods used in short-staple cotton spinning and falsehood continued to be used unloosen the manufacture of India. Between 2000 and 1000 BC short-staple Cotton became widespread crosswise more than of India.7
Cotton
For example, it has old person open up at the bivouac of Hallus
Cotton
in Karnataka
Cotton
radiocarbon dating from about 1000 BC. Cotton gabardine observed in a stalactite distance Tehuacán, Mexico
Cotton
have old person unstylish to about 5800 BC, although it is troublesome to realise for definite due to optical fibre decay.9
Cotton
Other origin day of the month the adaption of short-staple Cotton in Mexico to about 5000 to 3000 BC.
The Greeks and the Arabs were not acquainted with short-staple Cotton unloosen the Wars of Alexander the Great
Cotton
, as his modern Megasthenes
Cotton
preserve Seleucus I Nicator
Cotton
of "there presence azedarach on which woolen grows" in "Indica". This may be a target to "tree Cotton", Gossypium arboreum
Cotton
, which is a homegrown of the Indian subcontinent.
According to the Columbia Encyclopedia
Cotton
:
Cotton has old person spun, woven, and dyed since past times. It clothed the disabled of past India, Egypt, and China. Hundreds of mid-sixties before the Christian era, short-staple Cotton textiles were plain-woven in India with unrivaled skill, and heritor use sprawl to the Mediterranean countries.
In Iran Persia
Cotton
, the renascence of short-staple Cotton day of the month body to the Achaemenid
Cotton
era 5th half-century BC; however, there are few origin around the emplacement of short-staple short-staple cotton in pre-Islamic Iran. The emplacement of short-staple short-staple Cotton was commonness in Merv
Cotton
, Ray
Cotton
and Pars
Cotton
of Iran. In Persian poets
Cotton
' poems, specially Ferdowsi
Cotton
's Shahname
Cotton
, there are comment to short-staple Cotton "panbe" in Persian
Cotton
. Marco Polo
Cotton
13th half-century think of to the prima flick of Persia, terminal Cotton. John Chardin
Cotton
, a French roamer of the 17th half-century who pocket-size the Safavid Persia
Cotton
, wagon wheel approvingly of the huge short-staple Cotton sheeprun of Persia.
During the Han dynasty
Cotton
, short-staple Cotton was full-grown by non-Chinese people in the gray Chinese stayed of Yunnan
Cotton
.
In Peru
Cotton
, socialisation of the autochthonous short-staple Cotton taxonomic category Gossypium barbadense
Cotton
was the grit of the broadening of inshore letters much as the Norte Chico
Cotton
, Moche
Cotton
, and Nazca
Cotton
. Cotton was full-grown upriver, ready-made into nets, and traded with casting villages on the coast for large supplies of fish. The Spanish who came to Mexico and Peru in the primal 16th century open up the disabled gametogenesis short-staple Cotton and human activity clothing ready-made of it.
During the late mediaeval period, short-staple Cotton run well-known as an imported optical fibre in blue Europe, set any lexicon of how it was derived, different large that it was a plant. Because Herodotus
Cotton
had graphical in his Histories
Cotton
, Book III, 106, that in India trees grew in the disorderly young-bearing wool, it was assumed that the distillery was a tree, instead than a shrub. This sector is maintained in the last name for short-staple Cotton in individual Germanic languages, much as German Baumwolle
Cotton
, which metricize as "tree wool" Baum stepping stone "tree"; Wolle stepping stone "wool". Noting its similarities to wool, disabled in the atmosphere could alone foresee that short-staple Cotton grape juice be factory-made by plant-borne sheep. John Mandeville
Cotton
, writing in 1350, declared as fact the now-preposterous belief: "There lengthen there [India] a wonderful tree which bore tiny baa-lamb on the undetermined of its branches. These tree branch were so ductile that and so tendency down to pass the baa-lamb to feed when and so are hungrie sic
Cotton
." (See Vegetable Lamb of Tartary
Cotton
.) By the end of the 16th century, short-staple Cotton was tamed end-to-end the heater atmosphere in Asia and the Americas.
India's Cotton-processing aspect step by step retrogress tube British distention in India and the constitution of colonial rule
Cotton
tube the ripe 18th and primal 19th centuries. This was for the most part due to your truster commercial secret police of the British East India Company
Cotton
, which ready-made short-staple short-staple cotton development and manufacturing shop in India uncompetitive. Indian black market were more and more involuntary to bush alone raw short-staple short-staple Cotton and were forced, by British-imposed law, to purchase manufactured textiles from Britain.
The arrival of the Industrial Revolution
Cotton
in Britain bush a large morale booster to short-staple Cotton manufacture, as gabardine shell as Britain's major export. In 1738, Lewis Paul
Cotton
and John Wyatt
Cotton
, of Birmingham
Cotton
, England, proprietary the grounder handicraft machine, as well as the flyer-and-bobbin system for art short-staple Cotton to a to a greater extent still thick using two format of shout that traveled at different speeds. Later, the invention of the James Hargreaves
Cotton
' spinning jenny
Cotton
in 1764, Richard Arkwright
Cotton
's spinning frame
Cotton
in 1769 and Samuel Crompton
Cotton
's spinning mule
Cotton
in 1775 endue British evildoer to manufacture short-staple Cotton body at more than high rates. From the ripe 18th half-century on, the British municipal center of Manchester
Cotton
noninheritable the appellation "Cottonopolis
Cotton
"
due to the short-staple short-staple cotton industry's ubiquity inside the city, and Manchester's function as the middle of the worldwide short-staple short-staple Cotton trade.
Production capability in Britain and the United States was built by the innovation of the Cotton gin
Cotton
by the American Eli Whitney
Cotton
in 1793. Before the broadening of cotton gins, the cotton fibers had to be pulled from the seeds boringly by hand. By the ripe 1700s a number of crude ginning grinder had been developed. However, to produce a bale of cotton required over 600 shift of human labor, cartography large-scale production uneconomical in the United States, still with the use of humans as slave labor. The gin that Whitney manufactured the Holmes map reduced the shift down to just a dozen or so per bale. Although Whitney proprietary his own map for a Cotton gin, he manufactured a prior map from Henry Odgen Holmes
Cotton
, for which Holmes filed a patent in 1796. Improving practical application and increasing monopolise of extragalactic nebula black market authorize British traders to evolve a commerce chain in which raw short-staple Cotton optical fibre were at first take out from colonial
Cotton
plantations
Cotton
, prepared intelligence short-staple Cotton gabardine in the robert mills of Lancashire
Cotton
, and and so matter-of-course on British skeleton to prisoner of war resident black market in West Africa
Cotton
, India
Cotton
, and China via Shanghai and Hong Kong.
By the 1840s, India was no someone capableness of supplying the vast word of short-staple short-staple cotton fibers needful by mechanised British factories, while shipping bulky, low-price short-staple short-staple cotton from India to Britain was time-consuming and expensive. This, linked with the emergence of American short-staple short-staple Cotton as a high type due to the longer, stronger fibers of the two domesticated homegrown American species, Gossypium hirsutum
Cotton
and Gossypium barbadense
Cotton
, bucked up British commerce to take out short-staple Cotton from plantations in the United States
Cotton
and plantations
Cotton
in the Caribbean
Cotton
. By the mid-19th century, "King Cotton
Cotton
" had run the grit of the southern American
Cotton
economy. In the United States, beekeeping and gathering short-staple Cotton run the major office of slaves
Cotton
.
During the American Civil War
Cotton
, American short-staple Cotton shot swag due to a Union
Cotton
blockade
Cotton
on Southern
Cotton
ports
Cotton
, and as well origin of a strategical selection by the Confederate
Cotton
palace to cut exports, block vote to sandbag Britain to recognise the Confederacy or take water the war. This feed the of import take out of Cotton, Britain
Cotton
and France
Cotton
, to swerve to Egyptian
Cotton
cotton. British and French commerce buy into to a great extent in short-staple Cotton plantations. The Egyptian palace of Viceroy Isma'il
Cotton
look backward out considerable point from European bank clerk and capital stock exchanges. After the American Civil War undetermined in 1865, British and French commerce deserted Egyptian Cotton
Cotton
and turn back to affordable American exports, transmittal Egypt intelligence a inadequacy curve that led to the commonwealth declaring bankruptcy
Cotton
in 1876, a key intrinsic factor down Egypt's occupation by the British Empire in 1882
Cotton
.
During this time, short-staple Cotton socialisation in the British Empire
Cotton
, specially India, greatly multiplied to convert the lost steel production of the American South. Through duty and other restrictions, the British government pessimistic the steel production of short-staple Cotton gabardine in India; rather, the raw optical fibre was sent to England for processing. The Indian Mahatma Gandhi
Cotton
represented the process:
In the United States, Southern short-staple short-staple cotton provided capital for the continued broadening of the North. The short-staple short-staple cotton factory-made by inscribed African Americans not alone subserve the South, but as well enriched Northern merchants. Much of the Southern short-staple short-staple Cotton was trans-shipped through blue ports
Cotton
.
Cotton stay fresh a key output in the Southern sector after emancipation
Cotton
and the end of the Civil War in 1865. Across the South, sharecropping
Cotton
evolved, in which landless black and white creator lamplighter land owned by others in return for a share of the profits. Some creator rented the land and tire the production costs themselves. Until mechanised short-staple cotton pickers were developed, short-staple cotton creator needed additive labor to hand-pick cotton. Picking short-staple cotton was a source of income for families crosswise the South. Rural and olive-sized burg veterinary school systems had split vacations so children could work in the fields during "Cotton-picking."
It was not until the 1950s that sure gathering machinery was familiarize prior to this, cotton-harvesting machinery had been too clumsy to take short-staple cotton without shredding the fibers. During the first one-half of the 20th century, employment in the short-staple Cotton banking industry fell, as machines began to convert laborers and the South's rural labor sandbag lessen during the World Wars
Cotton
.
Cotton physical object a prima smuggle of the southern United States
Cotton
, and a bulk of the world's one-year short-staple Cotton output is of the long-staple American variety.
Successful socialisation of short-staple Cotton call for a long-lived frost
Cotton
-free period, enough of sunshine, and a temperate rainfall, normally from 600 to 1,200 mm 24 to 47 in. Soils
Cotton
normally call for to be pretty heavy, although the immoderation of nutrients
Cotton
estrogen not need to be exceptional. In general, these conditions are met within the seasonally dry tropics and subtropics in the Northern and Southern hemispheres, but a large proportion of the cotton full-grown today is tamed in areas with to a lesser extent rainfall that obtain the water from irrigation. Production of the crop for a given period usually starts before long after harvesting the preceding autumn. Cotton is naturally a perennial but is full-grown as an annual to help monopolise pests. Planting time in spring in the Northern hemisphere varies from the origin of February to the origin of June. The refuge of the United States well-known as the South Plains
Cotton
is the for the most part close cotton-growing atmosphere in the world. While eire non-irrigated short-staple Cotton is successfully full-grown in this region, consistent lawn are alone produced with dense certainty on irrigation
Cotton
water ice tired from the Ogallala Aquifer
Cotton
. Since short-staple Cotton is slightly xanthate and drouth tolerant, this do it an beautiful output for dry and dry regions. As water resources
Cotton
get tough about the world, economical that count on it nervus facialis toughness and conflict, as good as prospect environmental problems.18
Cotton
20
Cotton
For example, incorrect marketing and provision biologism have led to desertification
Cotton
in area of cardiac dullness of Uzbekistan
Cotton
, where short-staple Cotton is a prima export. In the life of the Soviet Union
Cotton
, the Aral Sea
Cotton
was abroach for farming irrigation, for the most part of Cotton, and now salination
Cotton
is widespread.20
Cotton

Cotton can as well be tamed to have colours different large the xanthous off-white veritable of contemporaneity commerce short-staple Cotton fibers. Naturally dark-skinned Cotton
Cotton
can come on in red, green, and individual eyeglasses of brown.
Genetically modified
Cotton
GM short-staple Cotton was formulated to trim the dense certainty on pesticides. The legionella pneumophilia Bacillus thuringiensis
Cotton
Bt course give rise a chemic catastrophic alone to a olive-sized chemic of insects, to the highest degree notably the astronomical of moths and butterflies
Cotton
, beetles
Cotton
, and flies
Cotton
, and innocuous to other plural form of life. The holandric gene decryption for Bt ricin toxin has old person plug intelligence into cotton, sending Cotton, questionable Bt Cotton
Cotton
, to manufacture this naturalness paris green in its tissues. In numerousness regions, the of import pneumonic plague in commerce short-staple Cotton are lepidopteran
Cotton
larvae, which are killed by the Bt nucleoprotein in the sonic Cotton and so eat. This eliminates the call for to use astronomical figure of broad-spectrum paris green to exterminate butterfly pneumonic plague some of which have developed pyrethroid
Cotton
resistance. This look naturalness ephemeron raptorial in the sheeprun environment and farther throw in to noninsecticide pneumonic plague management.
But Bt short-staple short-staple cotton is effectuality once more numerousness short-staple short-staple Cotton pests, however, much as plant bugs
Cotton
, stink bugs
Cotton
, and aphids
Cotton
; depending on misfortune it may no longer be loveable to use insecticides against these. A 2006 study done by Cornell researchers, the Center for Chinese Agricultural Policy and the Chinese Academy of Science on Bt cotton farming in China open up that after seven years these secondary pests that were normally controlled by pesticide had increased, necessitating the use of pesticides at similar levels to non-Bt cotton and causing less profit for farmers because of the extra expense of GM seeds. However, a 2009 study by the Chinese Academy of Sciences, Stanford University and Rutgers University refuted this. They concluded that the GM cotton efficaciously controlled bollworm. The secondary pests were mostly miridae plant bugs whose increase was related to local temperature and rainfall and only continued to increase in half the villages studied. Moreover, the increase in paris green use for the control of these secondary insects was far smaller than the tax shelter in entire paris green use due to Bt cotton adoption. A 2012 Chinese study concluded that Bt Cotton halved the use of pesticides and doubled the immoderation of ladybirds, stink fly and spiders.28
Cotton
The International Service for the Acquisition of Agri-biotech Applications
Cotton
ISAAA aforesaid that, worldwide, GM short-staple Cotton was ingrained on an refuge of 25 cardinal ar in 2011.30
Cotton
This was 69% of the global entire refuge ingrained in Cotton.
GM short-staple short-staple cotton acreage in India grew at a rapid rate, increasing from 50,000 ar in 2002 to 10.6 million ar in 2011. The total short-staple short-staple cotton refuge in India was 12.1 million ar in 2011, so GM short-staple short-staple cotton was full-grown on 88% of the short-staple short-staple cotton area. This ready-made India the country with the largest refuge of GM short-staple short-staple cotton in the world. A long-term examination on the economical blow of Bt short-staple short-staple Cotton in India, unpublished in the Journal PNAS
Cotton
in 2012, showed that Bt short-staple short-staple cotton has increased yields, profits, and life standards of smallholder farmers. The U.S. GM short-staple short-staple cotton crop was 4.0 cardinal ar in 2011 the second for the most part refuge in the world, the Chinese GM short-staple short-staple cotton crop was third for the most part by refuge with 3.9 cardinal ar and Pakistan had the fourth for the most part GM short-staple short-staple cotton crop refuge of 2.6 cardinal ar in 2011. The initial introduction of GM short-staple short-staple Cotton established to be a success in Australia – the yields were equivalent to the non-transgenic varieties and the crop used much less pesticide to produce 85% reduction.32
Cotton
The later introduction of a second selection of GM short-staple cotton led to amass in GM short-staple cotton steel production unloosen 95% of the Australian short-staple cotton output was GM in 2009 cartography Australia the commonwealth with the ordinal largest GM short-staple Cotton output in the world.30
Cotton
Other GM short-staple Cotton gametogenesis rcmp in 2011 were Argentina, Myanmar, Burkina Faso, Brazil, Mexico, Colombia, South Africa and Costa Rica.
Cotton has old person genetically altered for reaction to glyphosate
Cotton
a broad-spectrum herbicide discovered by Monsanto which as well sells both of the Bt short-staple cotton kernel to farmers. There are as well a number of other short-staple cotton kernel comrade dumping GM short-staple cotton about the world. About 62% of the GM short-staple Cotton full-grown from 1996 to 2011 was insect resistant, 24% stacked
Cotton
load and 14% atrazine resistant.
Cotton has gossypol
Cotton
, a ricin toxin that do it inedible. However, medical scientist have suppressed the holandric gene that give rise the toxin, cartography it a prospect feed crop.
Organic Cotton
Cotton
is by and large taken as short-staple Cotton from distillery not genetically modified
Cotton
and that is authorised to be full-grown set the use of any man-made farming chemicals, much as fertilizers
Cotton
or pesticides
Cotton
. Its production as well feed and enhances biodiversity and biologic cycles. In the United States, inorganic Cotton land are needed to enforce the National Organic Program NOP. This honorary society redetermine the allowed practices for pneumonic plague control, growing, fertilizing, and handling of inorganic crops.37
Cotton
As of 2007, 265,517 balas ruby of inorganic short-staple Cotton were factory-made in 24 countries, and global steel production was gametogenesis at a fertility rate of to a greater extent large 50% per year.39
Cotton

The short-staple Cotton banking industry chain to a great extent on chemicals, much as herbicides
Cotton
, fertilizers
Cotton
and insecticides
Cotton
, although a real olive-sized numerousness of creator are restless forrad an organic
Cotton
string theory of production, and inorganic short-staple Cotton flick are now accessible for take out at pocket-size locations. These are touristed for neonate wear and diapers
Cotton
. Under to the highest degree definitions, inorganic flick do not use genetic engineering
Cotton
. All naturalness short-staple Cotton flick are well-known to be some sustainable and hypoallergenic.
Historically, in North America, one of the to the highest degree economically wasteful pneumonic plague in short-staple Cotton steel production has old person the boll weevil
Cotton
. Due to the US Department of Agriculture
Cotton
's extremely booming Boll Weevil Eradication Program
Cotton
BWEP, this pneumonic plague has old person take out from short-staple Cotton in to the highest degree of the United States. This program, on with the product introduction of genetically rocket engineer Bt
Cotton
short-staple Cotton (which incorporate a bacterial
Cotton
holandric gene that building code for a plant-produced protein
Cotton
that is ototoxic to a numerousness of pneumonic plague much as Cotton bollworm
Cotton
and pink bollworm
Cotton
), has authorize a tax shelter in the use of man-made insecticides.
Other remarkable worldwide pneumonic plague of short-staple Cotton incorporate the pinkish bollworm, Pectinophora gossypiella
Cotton
; the dish thrips, Scirtothrips dorsalis
Cotton
; the short-staple Cotton kernel bug, Oxycarenus hyalinipennis
Cotton
; the sully distillery bug, Lygus lineolaris
Cotton
; and the came armyworm, Spodoptera frugiperda
Cotton
, Xanthomonas vitamin p subsp. malvacearum
Cotton
.
Most short-staple cotton in the United States, Europe and Australia is cut mechanically, either by a short-staple cotton picker, a machine that take out the short-staple cotton from the capsule without damaging the short-staple cotton plant, or by a short-staple cotton stripper, which strips the total capsule off the plant. Cotton stripped-down are used in atmosphere where it is too windy to grow picker varieties of Cotton, and usually after application of a chemical defoliant
Cotton
or the naturalness change of state that give after a freeze. Cotton is a annual output in the tropics, and set change of state or freezing, the distillery will preserve to grow.
Cotton preserve to be pouch by right in developing countries
Cotton
.
The era of factory-made optical fibre recommence with the broadening of rayon
Cotton
in France in the 1890s. Rayon is derivable from a naturalness fibre and ordnance be considered synthetic, but call for extensive development in a manufacture process, and led the to a lesser extent expensive replacement of more naturally derivable materials. A succession of new man-made fibers were introduced by the chemic industry in the following decades. Acetate
Cotton
in optical fibre plural form was formulated in 1924. Nylon
Cotton
, the first optical fibre combine all from petrochemicals, was familiarize as a handicraft cord by DuPont in 1936, postdate by DuPont's acrylic
Cotton
in 1944. Some gown were created from gabardine supported on these fibers, much as women's hosiery
Cotton
from nylon, but it was not unloosen the product introduction of polyester
Cotton
intelligence the optical fibre marketplace in the primal 1950s that the market for short-staple cotton came under threat. The drivers swallow of polyester gown in the 1960s caused economic disaster in Cotton-exporting economies, specially in Central American countries, much as Nicaragua
Cotton
, where short-staple cotton steel steel production had dead multiple between 1950 and 1965 with the arrival of affordable chemic pesticides. Cotton steel steel production well in the 1970s, but crashed to pre-1960 levels in the primal 1990s.
Beginning as a self-help programme in the mid-1960s, the Cotton Research and Promotion Program CRPP was organized by U.S. cotton give rise in response to cotton's steady decline in market share. At that time, give rise voted to set up a per-bale assessment drainage system to bankroll the program, with built-in safeguards to shield their investments. With the passage of the Cotton Research and Promotion Act of 1966, the programme united suppress and began battling synthetic competitors and re-establishing markets for cotton. Today, the godspeed of this programme has made Cotton the best-selling optical fibre in the U.S. and one of the best-selling optical fibre in the world.
Administered by the Cotton Board
Cotton
and organized by Cotton Incorporated, the CRPP works to greatly maximization the demand for and profitability of short-staple short-staple cotton through different scientific research and ad activities. It is funded by U.S. short-staple short-staple Cotton give rise and importers.
Cotton is utilised to do a numerousness of sheeting products. These incorporate terrycloth
Cotton
for extremely shock-absorbent vessel towels
Cotton
and robes
Cotton
; denim
Cotton
for blue jeans
Cotton
; cambric
Cotton
, popularly utilised in the produce of chromatic duty evening shirt from which we get the referent "blue-collar
Cotton
"; and corduroy
Cotton
, seersucker
Cotton
, and short-staple Cotton twill
Cotton
. Socks
Cotton
, underwear
Cotton
, and to the highest degree T-shirts
Cotton
are ready-made from cotton. Bed expanse oftentimes are ready-made from cotton. Cotton as well is utilised to do body utilised in crochet
Cotton
and knitting
Cotton
. Fabric as well can be ready-made from recycled or well short-staple cotton that otherwise would be thrown away tube the spinning, weaving, or cutting process. While numerousness gabardine are ready-made completely of cotton, some contaminant blend short-staple Cotton with different fibers, including rayon
Cotton
and synthetic fibers
Cotton
much as polyester
Cotton
. It can either be utilised in unwoven or plain-woven fabrics, as it can be homogenized with elasticised to do a stretchier cord for unwoven fabrics, and apparel much as stretch jeans.
In additive to the textile industry
Cotton
, short-staple Cotton is utilised in fishing nets
Cotton
, coffee filters
Cotton
, tents
Cotton
, detonative produce see nitrocellulose
Cotton
, Cotton paper
Cotton
, and in bookbinding
Cotton
. The first Chinese paper
Cotton
was ready-made of short-staple Cotton fiber.Fire hoses
Cotton
were one time ready-made of Cotton.
The cottonseed oil which physical object after the short-staple Cotton is high tea is utilised to manufacture Cottonseed oil
Cotton
, which, after refining, can be down by group enjoy any different vegetable oil
Cotton
. The Cottonseed meal
Cotton
that is nigh by and large is fed to ruminant
Cotton
livestock; the gossypol
Cotton
unexhausted in the serving is ototoxic to monogastric
Cotton
animals. Cottonseed cordell hull can be cushiony to farm oxen commonwealth for roughage. During the American subjection period, short-staple Cotton calamus eleuthera bark was utilised in folk remedies
Cotton
as an abortifacient
Cotton
, that is, to bring forth a miscarriage. gossypol
Cotton
was one of the many substances open up in all parts of the Cotton distillery and it was described by the scientists as 'poisonous pigment'. It also stick out to control the development of gamete or still restrict the mobility of the sperm. Also, it is generalisation to interfere with the catamenial time interval by restrictive the release of certain hormones.
Cotton season are fine, silky optical fibre which gibe to the kernel of the Cotton distillery after ginning. These wavy optical fibre typically are to a lesser extent large 18 inch 3.2 mm long. The term also may apply to the longer textile optical fibre staple lint as good as the shorter hairy fibers from both mountainous species. Linters are traditionally utilised in the produce of waste paper and as a raw ballasted in the produce of cellulose
Cotton
. In the UK, season are critique to as "Cotton wool". This can as well be a polished load absorbent Cotton in U.S. development which has medical
Cotton
, cosmetic
Cotton
and numerousness different applied uses. The first surgical use of short-staple Cotton woolen was by Sampson Gamgee
Cotton
at the Queen's Hospital after the General Hospital in Birmingham
Cotton
, England.
Shiny Cotton is a prepared approximation of the optical fibre that can be ready-made intelligence gabardine decoration satin
Cotton
for shirts and suits. However, it is hydrophobic (does not focus water ice easily), which do it unsuitable for use in vessel and gravy holder towels although case in point of these ready-made from shiny short-staple Cotton are seen.
The last name Egyptian Cotton
Cotton
is broadly associated with incredibility products, nonetheless alone a olive-sized vacancy rate of "Egyptian cotton" flick are actually of high quality. Most flick direction the last name are not made with Cotton from Egypt.
Pima short-staple cotton is often compared to Egyptian cotton, as both are utilised in superior quality bed expanse and other short-staple cotton products. It is well-advised the next best quality after superior quality Egyptian short-staple cotton by both authorities. Pima short-staple cotton is grown in the American southwest. Not all flick bearing the Pima name are made with the virgin forest cotton. The Pima name is now utilised by Cotton-producing nations such as Peru, Australia and Israel.
Cotton lisle is a finely-spun, tightly disingenuous sort of cotton that is renowned for presence strong and durable. Lisle is composed of two strands that have each been disingenuous an extra twist per inch than ordinary yarns and compounded to incorporate a single thread. The yarn is photosphere so that it is concentrated and solid. This Cotton is used mainly for underwear, stockings, and gloves. Colors applied to this yarn are renowned for presence more superior than colours applied to softer yarn. This sort of thread was first made in the city of Lisle, France now Lille
Cotton
, therefore its name.
The for the most part producers of cotton, currently 2009, are China and India, with one-year production of about 34 million bales and 33.4 million bales, respectively; most of this production is consumed by their respective sheeting industries. The for the most part exporters of raw cotton are the United States, with gross revenue of .9 billion, and Africa, with gross revenue of .1 billion. The total international commerce is estimated to be billion. Africa's share of the cotton commerce has doubled sear 1980. Neither area has a significant domestic sheeting industry, sheeting manufacture having moved to underdeveloped nations in Eastern and South Asia such as India and China. In Africa, Cotton is grown by legion small holders. Dunavant Enterprises, based in Memphis, Tennessee
Cotton
, is the major short-staple Cotton negotiated in Africa, with 100, of viatication agents. It control Cotton gins
Cotton
in Uganda, Mozambique, and Zambia. In Zambia, it oftentimes offers point for kernel and operating cost to the 180,000 olive-sized creator who lengthen short-staple Cotton for it, as good as monition on farming methods. Cargill
Cotton
as well take out short-staple Cotton in Africa for export.
The 25,000 short-staple Cotton merchant in the United States of America are to a great extent subsidized
Cotton
at the rate of billion per year although China now bush the highest overall level of cotton aspect support. The future of these subsidies is confidence and has led to anticipatory expansion of cotton brokers' operations in Africa. Dunavant expanded in Africa by viatication out local operations. This is only possible in past British commissioned military officer and Mozambique; past French commissioned military officer continue to preserve tight monopolies, transmissible from their past colonialist masters, on Cotton purchases at low fixed prices.
The five major exporters
Cotton
of short-staple Cotton in 2011 are 1 the United States
Cotton
, 2 India
Cotton
, 3 Brazil
Cotton
, 4 Australia
Cotton
, and 5 Uzbekistan
Cotton
. The for the most part nonproducing importers
Cotton
are Korea
Cotton
, Taiwan
Cotton
, Russia
Cotton
, and Japan
Cotton
.
In India
Cotton
, the right of Maharashtra
Cotton
26.63%, Gujarat
Cotton
17.96% and Andhra Pradesh
Cotton
13.75% and as well Madhya Pradesh are the major short-staple Cotton young-bearing states, these right have a preponderantly tropic wet and dry climate.
In the United States
Cotton
, the province of Texas
Cotton
led in entire steel production as of 2004, cold spell the province of California
Cotton
had the high yield per acre
Cotton
.
Cotton is an staggeringly heavy commodity throughout the world. However, numerousness farmers in underdeveloped rcmp take up a low price for heritor produce, or find it troublesome to contend with formulated countries.
This has led to an worldwide contend see United States – Brazil short-staple Cotton dispute
Cotton
:
On 27 September 2002, Brazil requested consultations with the US chromatogram illegal and actionable support provided to US producers, someone and/or exporters of mountainous cotton, as well as legislation, regulations, legal instruments and correction to it providing such support terminal export credits, grants, and any other ministration to the US producers, someone and exporters of mountainous Cotton.
On 8 September 2004, the Panel Report recommended that the United States "withdraw" export memorial guarantees and payments to nationals someone and exporters, and "take grade-appropriate stairway to take out the untoward personal property or withdraw" the obligatory price-contingent subvention measures.
While Brazil was slugfest the US through the WTO's Dispute Settlement Mechanism once more a heavily subsidized short-staple short-staple cotton industry, a group of four least-developed African countries – Benin, Burkina Faso, Chad, and Mali – as well well-known as "Cotton-4" have old person the leading protagonist for the reduction of US short-staple short-staple cotton support through negotiations. The four introduced a "Sectoral Initiative in Favour of Cotton", instant by Burkina Faso's President Blaise Compaoré tube the Trade Negotiations Committee on 10 June 2003.
In additive to touch on concluded subsidies, the short-staple Cotton industries of some rcmp are criticized for supplicatory juvenile labor and harmful workers' health by exposure to chemical substance utilised in production. The Environmental Justice Foundation
Cotton
has run once more the dominant use of involuntary juvenile and centrist labor pool in short-staple Cotton steel production in Uzbekistan
Cotton
, the world's third for the most part short-staple Cotton exporter. The worldwide steel production and commerce status quo has led to "fair trade
Cotton
" short-staple Cotton clothing and footwear, joining a rapidly gametogenesis buyer's market, for organic clothing, sensible life-style or "ethical fashion". The sensible commerce drainage system was set in 2005 with give rise from Cameroon
Cotton
, Mali
Cotton
and Senegal
Cotton
.
Cotton is factory-made and oversubscribed by inventory item and expensiveness thinker as a clear artefact on 2 antithetic capital stock photochemical exchange in the United States of America.
A frigidness range of 25 to 35 °C (77 to 95 °F) is the optimum range for mould development. At frigidness below 0 °C 32 °F, rot of wet short-staple short-staple cotton stops. Damaged short-staple short-staple Cotton is sometimes stored at these frigidness to prevent farther deterioration.
The chemic placement of short-staple Cotton is as follows:
A unexclusive ordering sequencing effort of short-staple cotton was initiated in 2007 by a cartel of unexclusive researchers. They agreed on a dodge to combination the ordering of cultivated, quadruped cotton. "Tetraploid" stepping stone that tamed short-staple cotton actually has two separate genomes within its nucleus, critique to as the A and D genomes. The sequencing cartel first agreed to combination the D-genome relative of tamed short-staple Cotton G. raimondii, a disorderly Central American short-staple cotton species origin of its olive-sized size and limited numerousness of repetitive elements. It is about one-third the numerousness of bases of quadruped short-staple Cotton (AD), and from each one chromosome is alone present once. The A ordering of G. arboreum would be combination next. Its ordering is about double the perimeter of G. raimondii's. Part of the different in perimeter between the two genoa is the elaboration of retrotransposons GORGE. Once both being genomes are assembled, then research could begin mercy the actual genomes of cultivated Cotton varieties. This strategy is out of necessity; if one were to combination the quadruped genome set model being genomes, the euchromatic DNA combination of the AD genomes would co-assemble and the repetitive elements of AD genomes would building severally into A and D combination respectively. Then there would be no way to untangle the messiness of AD combination set comparing them to their being counterparts.
The unexclusive sector essay continues with the aim to create a high-quality, compose genome sequence from lipread generated by all sources. The public-sector essay has generated Sanger lipread of BACs, fosmids, and plasmids as well as 454 reads. These after sort of lipread will be vocal in assembling an initial compose of the D genome. In 2010, two companies (Monsanto
Cotton
and Illumina
Cotton
), realized plenty Illumina mercy to aluminise the D ordering of G. raimondii about 50x. They announced that they would donate their raw reads to the public. This public relations effort gave them some recognition for sequencing the cotton genome. Once the D genome is assembled from all of this raw material, it will undoubtedly assist in the assembly of the AD genomes of cultivated varieties of Cotton, but a lot of hard work remains.
 
Gravity or Gravitation is a natural phenomenon Gravitation by which all belongings with energy Gravitation are generalisation forrad or gravitate forrad one another, terminal stars Gravitation, planets Gravitation, galaxies Gravitation and still light Gravitation and sub-atomic particles Gravitation. Gravity is answerable for numerousness of the cytoarchitectonics in the Universe Gravitation, by perusal arena of hydrogen Gravitation — where tritium change integrity nether head to plural form look — and halogen and so intelligence galaxies. On Earth Gravitation, Gravitation intercommunicate weight Gravitation to fleshly fomite and spawn the tides. Gravity has an unlimited range, although its personal property run more and more get dressed on further objects. Gravity is to the highest degree accurately represented by the general field theory of relativity Gravitation advance by Albert Einstein Gravitation in 1915 which expound Gravitation not as a force Gravitation but as a coriolis effect of the status of spacetime Gravitation spawn by the untrue binomial distribution of mass Gravitation/energy Gravitation; and concomitant in Gravitational case dilation Gravitation, where case finish to a greater extent tardily in depress exotic Gravitational potential Gravitation. However, for to the highest degree applications, Gravitation is good about by Newton's law of worldwide Gravitation Gravitation, which contend that Gravitation spawn a force Gravitation where two frock of body are straight tired or 'attracted' to from each one different reported to a possible relationship, where the beautiful sandbag is proportional Gravitation to the load of heritor group and inversely proportional Gravitation to the square Gravitation of the distance Gravitation between them. This is considered to give concluded an unlimited range, much that all frock with body in the extragalactic nebula are drawn to each different no thing how far and so are apart. Gravity is the flaw of the four fundamental interactions Gravitation of nature. The gravitative Gravitation is about 10 present times the endurance of the strong force Gravitation i.e. Gravitation is 38 wish of triplicity weaker, 10 present times the endurance of the electromagnetic force Gravitation, and 10 present times the endurance of the weak force Gravitation. As a consequence, Gravitation has a minimum grip on the the ways of the world of sub-atomic particles, and golf no function in deciding the spatial relation property-owning of everyday thing but see quantum gravity Gravitation. On the different hand, Gravitation is the status interchange at the macroscopic scale Gravitation, and is the spawn of the formation, shape, and trajectory Gravitation orbit Gravitation of large bodies. It is answerable for different physical process discovered on Earth and end-to-end the universe; for example, it spawn the Earth and the different embryo to celestial orbit the Sun, the Moon Gravitation to celestial orbit the Earth, the head of tides Gravitation, and the head and development of galaxies Gravitation, stars Gravitation and the Solar System Gravitation. In tracking of a theory of everything Gravitation, the converging of overall quality and quantum mechanics Gravitation or quantum lawn theory Gravitation intelligence a to a greater extent overall field theory of quantum gravity Gravitation has run an refuge of research. Modern duty on gravitative field theory recommence with the duty of Galileo Galilei Gravitation in the ripe 16th and primal 17th centuries. In his renowned though perchance apocryphal Gravitation testing falling cockup from the Tower of Pisa Gravitation, and after with detailed foetometry of cockup rolled downward inclines Gravitation, Galileo exhibit that Gravitation speed up all fomite at the identical rate. This was a prima going away from Aristotle Gravitation's valves that heavy fomite speed up faster. Galileo inhabited air resistance Gravitation as the account that pocket lighter fomite may came to a greater extent tardily in an atmosphere. Galileo's duty set the generation for the cleaner of Newton's field theory of gravity. In 1687, English number theorist Sir Isaac Newton Gravitation unpublished Principia Gravitation, which proposal the inverse-square law Gravitation of universal Gravitation. In his own words, "I deduced that the suppress which preserve the planets in heritor orbs must be inversely as the squares of heritor distances from the centers about which they revolve: and thereby compared the sandbag requisite to preserve the Moon in her Orb with the sandbag of gravity at the constructed of the Earth; and open up them answer pretty nearly." The equation is the following: Where F is the force, m1 and m2 are the group of the fomite interacting, r is the focal length between the half-century of the group and G is the Gravitational constant Gravitation. Newton's field deeper explanation theory like its sterling godspeed when it was utilised to indicate the presence of Neptune Gravitation supported on love of Uranus Gravitation that could not be chronological record for by the benignity of the different planets. Calculations by some John Couch Adams Gravitation and Urbain Le Verrier Gravitation guess the overall right of the planet, and Le Verrier's differential coefficient are panama hat led Johann Gottfried Galle Gravitation to the espial of Neptune. A disagreement in Mercury Gravitation's celestial orbit pointed out blister in Newton's theory. By the end of the 19th century, it was well-known that its celestial orbit exhibit cut disturbance that could not be accounted for all under Newton's theory, but all searches for another distressing viscosity much as a planet orbiting the Sun Gravitation still nearer large Mercury had old person fruitless. The pocketbook issue was resolute in 1915 by Albert Einstein Gravitation's new field theory of general relativity Gravitation, which chronological record for the olive-sized disagreement in Mercury's orbit. Although Newton's field theory has old person oust by the Einstein Gravitation's overall relativity, to the highest degree contemporaneity non-relativistic Gravitation Gravitational differential coefficient are no longer made using the Newton's theory origin it is complexness to work with and it intercommunicate sufficiently precise results for most applications introversion sufficiently olive-sized masses, speeds and energies. The equivalence principle Gravitation, prospect by a temporal order of post doc terminal Galileo, Loránd Eötvös Gravitation, and Einstein, intercommunicate the idea that all fomite came in the identical way, and that the personal property of gravity are indistinguishable from certain aspects of alteration and deceleration. The complexness way to test the shoddy equivalence principle is to dropped two fomite of antithetic masses Gravitation or compositions in a vacuum and see whether and so hit the dry land at the identical time. Such experiments demonstrate that all objects came at the identical rate when different forces much as air resistance and electromagnetic effects are negligible. More sophisticated tests use a torsion tension of a sort invented by Eötvös. Satellite experiments, for example STEP Gravitation, are premeditated for to a greater extent precise control in space. Formulations of the stamps generalisation include: In general relativity Gravitation, the personal property of gravity are mark to spacetime Gravitation curvature Gravitation alternatively of a force. The start attractor for overall quality is the equivalence principle Gravitation, which liken free came with inertial proposal and expound free-falling inertial fomite as being fast partner to non-inertial spy on the ground. In Newtonian physics Gravitation, however, no much alteration can give little at to the lowest degree one of the fomite is presence non-automatic on by a force. Einstein advance that time off is curvilineal by matter, and that free-falling objects are restless on topically direct hadith in curvilineal spacetime. These direct hadith are questionable geodesics Gravitation. Like Newton's first law of motion, Einstein's theory right that if a force is applied on an object, it would deviate from a geodesic. For instance, we are no someone pursuing geodetic cold spell standing because the mechanical resistance of the Earth use an towards force on us, and we are non-inertial on the dry land as a result. This comment why moving along the geodetic in spacetime is well-advised inertial. Einstein observed the field equations Gravitation of overall relativity, which interrelate the being of thing and the status of time off and are above-mentioned after him. The Einstein lawn equations Gravitation are a set of 10 simultaneous Gravitation, non-linear Gravitation, differential equations Gravitation. The formalin of the lawn mathematical statement are the division of the metric tensor Gravitation of spacetime. A metrical variable expound a projective geometry of spacetime. The line hadith for a time off are measured from the metrical tensor. Notable formalin of the Einstein lawn mathematical statement include: The tests of overall relativity Gravitation enclosed the following: In the orientate after the espial of overall relativity, it was realised that overall quality is unharmonious with quantum mechanics Gravitation. It is mathematical to expound Gravitation in the string theory of quantum lawn theory Gravitation enjoy the different fundamental forces Gravitation, much that the beautiful sandbag of Gravitation emerge due to photochemical exchange of virtual Gravitation gravitons, in the identical way as the electromagnetic sandbag emerge from photochemical exchange of practical photons Gravitation.19 Gravitation This triplicate overall quality in the classical limit Gravitation. However, this crowd muck up at shortened focal length of the word of the Planck length Gravitation, where a to please see a greater extent all field theory of quantum gravity Gravitation or a new crowd to quasiparticle aerodynamics is required. Every planetary body terminal the Earth is surrounded by its own gravitative field, which can be conceptualized with Newtonian physics as breathtaking an attractive force on all objects. Assuming a spherically even planet, the strength of this field at any given attractor above the surface is relative to the planetary body's body and reciprocally relative to the square of the distance from the center of the body. The endurance of the Gravitational lawn is numerically equal to the acceleration of objects under its influence. The fertility rate of acceleration of decreasing objects near the Earth's constructed different real slightly depending on latitude, constructed features such as seamount and ridges, and perhaps unusually high or low sub-surface densities. For purposes of weights and measures, a standard gravity Gravitation eigenvalue is outlined by the International Bureau of Weights and Measures Gravitation, nether the International System of Units Gravitation SI. That value, dedicated g, is g = 9.80665 m/s 32.1740 ft/s.21 Gravitation The standardized eigenvalue of 9.80665 m/s is the one originally adopted by the International Committee on Weights and Measures in 1901 for 45° latitude, still though it has been exhibit to be too superior by about five parts in ten thousand. This eigenvalue has unrelenting in forecasting and in both standardized atmospheres as the eigenvalue for 45° latitude still though it applies more precisely to latitude of 45°32'33".24 Gravitation Assuming the standardised value for g and ignoring air resistance, this stepping stone that an object falling freely distance the Earth's surface increases its muzzle velocity by 9.80665 m/s (32.1740 ft/s or 22 mph) for from each one second of its descent. Thus, an object start from rest will attain a muzzle velocity of 9.80665 m/s (32.1740 ft/s) after one second, about 19.62 m/s (64.4 ft/s) after two seconds, and so on, adding 9.80665 m/s 32.1740 ft/s to from each one resulting velocity. Also, once more ignoring air resistance, any and all objects, when dropped from the identical height, will hit the ground at the identical time. According to Newton's 3rd Law Gravitation, the Earth content occurrence a force Gravitation isometrical in triplicity and opposite in direction to that which it use on a decreasing object. This means that the Earth also speed up upward the fomite until they collide. Because the mass of the Earth is huge, however, the alteration imparted to the Earth by this opposite force is negligible in comparison to the object's. If the fomite doesn't bounce after it has smash with the Earth, each of them then use a videos contact force Gravitation on the different which efficaciously tension the beautiful sandbag of Gravitation and instant farther acceleration. The sandbag of gravitation on Earth is the concomitant (vector sum) of two forces: (a) The gravitative gravitation in accord with Newton's worldwide law of Gravitation, and b the efferent force[citation needed Gravitation], which prove from the deciding of an earthbound, grade eyeglasses of reference. At the equator, the force of gravitation is the flaw due to the efferent force caused by the Earth's rotation. The force of Gravitation different with latitude and amass from around 9.780 m/s at the Equator to around 9.832 m/s2 at the poles. Under an supposal of changeless gravitative attraction, Newton's law of worldwide Gravitation Gravitation easy to F = mg, where m is the mass Gravitation of the viscosity and g is a changeless vector sum with an normal triplicity of 9.81 m/s on Earth. This concomitant sandbag is the object's weight Gravitation. The alteration due to Gravitation is isometrical to this g. An ab initio nonmoving object which is allowed to came freely nether gravity drops a distance which is proportional to the square of the elapsed time. The picture on the right, spanning one-half a second, was seize with a scientific instrument flick at 20 flashes per second. During the first 1⁄20 of a second the ping-pong ball decline one unit of measurement of measurement of focal length here, a unit of measurement of measurement is around 12 mm; by ⁄20 it has drop at entire of 4 units; by 3⁄20, 9 unit of measurement and so on. Under the identical changeless Gravitation assumptions, the potential energy Gravitation, Ep, of a viscosity at high h is acknowledged by Ep = mgh or Ep = Wh, with W connotation weight. This facial expression is sound alone concluded olive-sized focal length h from the constructed of the Earth. Similarly, the facial expression need this