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Tag: "single" at biology news

One species, many genomes

...l. He adds "The insight that the DNA sequence of a single individual is by far not sufficient to understand the genetic potential of a species also fuels current efforts in human genetics." Still, it is surprising that Arabidopsis has such a plastic genome. In contrast to the genome of humans or many crop...

Identified main genetic variants involved in response to HIV

...own as simple nucleotide polymorphisms (SNPs), are single variations affecting only one nucleotide or base of the genomic sequence. Despite humans sharing 99.9% of the genome sequence, there are still 3 million genetic variations –which make us different from one another– 90% of which are due to SNPs. Hence...

Old memory traces in brain may trigger chronic pain

... on suffering.” Chronic pain is not caused by a single mechanism, Apkarian noted. Sensory abnormalities in people with chronic pain probably drive this memory abnormality. About 10 percent of the United States population suffers from chronic pain, of which the majority is back pain. One of Apkaria...

Researchers track how spores break out of dormant state

... its dormant state. But a new in vitro study of single germinating Bacillus atrophaeus spores details how the spore coat structures break down, and it shows with unprecedented resolution how the new bacterium emerges from the disintegrating spore. The new research, led by Lawrence Livermore National Labo...

Simulations unravel outer membrane transport mechanism

...et more computational power, we’re looking less at single proteins and more and more at the interaction of proteins,” he said. “And this is going in the direction of what’s called systems biology. This is essential because none of these proteins actually works alone. Each works in concert with many other th...

How to lose weight and not go hungry: HU researcher develops drug that mimics feeling of 'fullness'

...oss. In experiments with mice, it was shown that a single oral administration of BL-3020 led to reduced consumption over a period of 24 hours. Over a 12-day period of daily dosages, the mice weighed 40 percent less than the average for mice of their size and age who were not being given the compound. Th...

Envisat captures first image of Sargassum from space

...ssively complex tasks beyond the capabilities of a single machine or local network. By using Grid technology, Gower and King intend to compute 5-years worth of MERIS data to determine global estimates of Sargassum biomass and its contribution to ocean productivity. "So far, we have found two things (Sar...

Caribbean frogs started with a single, ancient voyage on a raft from South America

... the coqui frogs of Puerto Rico, originated from a single frog species that rafted on a sea voyage from Sout...es of these Caribbean amphibians also arose from a single species that arrived by raft from South America. "This discovery is surprising because no previou...

Millions of children denied drug that costs less than $3 a year

...hildren, could return to a normal life by taking a single daily dose of a drug (phenobarbital) that costs less than $3 (£1.5; €2.2) each year. The World Health Organisation recommends phenobarbital as the treatment of choice in resource restricted countries, but this policy has been questioned because of...

In mice, drug protects against diabetes and atherosclerosis

Blocking a single protein with an experimental drug prevented and treated both type 2 diabetes and atherosclerosis in laboratory mice that had been fed unhealthy diets and were genetically predisposed to these common killers, according to an article published online a...

Ancient DNA traces the woolly mammoth's disappearance

...isolation for some time before merging back into a single population. The DNA further suggests that no later than forty thousand years ago, one of the groups died out, leaving only the second alive at the time of the mammoth’s last gasp. “At a time when we should be very concerned about the potential ext...

Brightening prospects of using fluorescent nanotubes in medical applications

...t 100,000 laid side-by-side to span the width of a single human hair. In the last five years, scientists have discovered that some individual nanotubes are fluorescent. That is, they glow when they are bathed in light. Some glow brightly. Others glow dimly. Some glow in spots. Others glow all over. Until ...

Breakthrough developments in rheumatoid arthritis reported

...d some family members without it) in an attempt to single out those genes that are involved in the autoimmun...one on to use modern genetic methods to search for single nucleotide polymorphisms, or SNPs, to identify players that have fallen under the radar of older met...

U-M researchers discover gene switched off in cancer can be turned on

...ne person to the next, and even the cells within a single tumor are not the same. Giving a single drug or drug combination to 500 people is setting ourselves up for failure, much like a one-size-fit...

Physicist cracks women's random but always lucky choice of X chromosome

... all the material building up in both plugs into a single protein plug. That single plug then closes off one of the XIST suicide genes allowing its host X chromosome to continue to ope...

Massive herds of animals found to still exist in Southern Sudan

... also significantly reduced. “We did not observe a single zebra during the systematic survey in Boma, where 29,000 were seen in the early ’80s,” said Elkan. During complementary reconnaissance surveys in late May, Elkan, WCS pilot Falk Grossman and Jamus Joseph, assistant director of the WCS Southern Sudan ...

CT scan reveals ancient long-necked gliding reptile

...tain information about the animals. Even then, no single slice contained the entire skeleton. Post-scan processing produced an amazingly clear, if somewhat flattened, image of a small reptile with a long neck and swept back wings. Gliding behavior evolved several times in reptiles and is present in the...

College students who pull 'all-nighters' and get no sleep more likely to have a lower GPA

...ege students involves "pulling all-nighters", or a single night of total sleep deprivation, a practice assoc...collected in this study indicate that the use of a single night of total sleep deprivation is not an effective practice for achieving academic goals," said Pa...

New findings challenge established views on human genome

...rk was essential to the success of this effort. No single experimental approach can be used to identify all functional elements in the genome. So, it was necessary to conduct multiple, diverse experiments and then analyze them using multiple computational methods,” said Elise A. Feingold, Ph.D., program dir...

Bacteria ferry nanoparticles into cells for early diagnosis, treatment

...ld make it possible to monitor activities inside a single cell for the early detection of cancer and other diseases and to monitor the progress of disease and response to drug therapy. The carbon nanotubes could be delivered into diseased cells and then exposed to light, causing them to heat up and kill onl...

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