Tag: "usual" at biology news

New insight into control of parental gene expression in eggs

...nctions of proteins whose complete ablation by the usual knockout techniques would be lethal." More broadly, said Bartolomei, such studies investigating the regulation of imprinting are likely to yield new insight into the machinery underlying the epigenetic control of gene expression. "Our findings sugges...

Purdue research suggests 'nanotubes' could make better brain probes

...ls sprouted about five neurites, compared with the usual three neurites formed in suspensions with nanotubes that didn't have the small surface features. Researchers plan to make brain probes and implants out of a mixture of plastics and nanotubes. The findings demonstrated that progressively fewer astr...

Scientists identify molecular step that causes intoxication

...ts in which the BK channels opened more often than usual - without alcohol exposure - just as normal channels do when exposed to alcohol. As they predicted, worms with these abnormal BK channels acted just as intoxicated - without any exposure to alcohol - as normal worms did under the influence, confirmin...

Early treatment can prevent severe vision loss in premature infants

...iagnosed at birth with ROP as being at higher than usual risk for vision loss, based on the computerized guide that assessed birth weight, ethnicity, gestational age, direct examination of the eye, whether the infant was a single or multiple birth baby, and whether the infant had been born in a hospital th...

Abandoned penguin colonies may help refine Antarctic climate studies

...lf in March of 2000, has caused much more ice than usual to accumulate for a number of years in eastern McMurdo Sound, essentially cutting off large Adelie colonies at Cape Royds, Cape Crozier, and Cape Bird. Another enormous berg, called C-16 has exacerbated the ice build up. The bergs prevented Ross Se...

Lewis and Clark notes reveal history of human impacts

...ns on the Lewis and Clark trail, almost all of the usual game animals were very scarce. The explorers ate some of their horses and 195 dogs during transit across this region. "Many people have a vision of very little human influence on the land around the time of the Lewis and Clark expedition," Ripple sa...

Major mutations, not many small changes, might lead way to new species

...ponded with petals of yellow-orange instead of the usual pink. Although its other features flower size, petal shape and amount of nectar were unchanged, the resulting flowers were suddenly being visited 68 times more often by hummingbirds. The flowers were actually shunned by bees, probably because oran...

Major new finding on genetics of Parkinson's disease zeroes in on activity of alpha synuclein

...ly affected by Parkinson's disease, instead of the usual two copies of the -synuclein gene in the chromosome 4 pair, the researchers found four copies of the -synuclein gene. This multiplication of the -synuclein gene (an abnormal triplication of three genes on one chromosome 4 and the normal one copy on t...

Research collaboration identifies gene essential to puberty

...al disorder in which puberty does not occur at the usual age. Normal puberty begins when the hypothalamus, a structure deep within the brain, begins to secrete gonadotropin-releasing hormone (GnRH). In response to this secretion, the pituitary gland releases hormones called gonadotropins, which in turn s...

Adult alcoholism and attention-deficit hyperactivity disorder are connected

...pared to normal subjects," explained Johann. "The usual response to fenfluramine administration is a measu...rable increase in the circulating prolactin. This usual increase is blunted in subjects with ADHD or alcoholism. The main structures responsible for the fe...

Gene expression tied to social behavior in honey bees

...e will begin foraging up to two weeks earlier than usual while others will grow up normally and act as nurses, making for age-matched young nurses and foragers. Age-matched old foragers and old nurses also were obtained from these colonies. A dominant pattern of gene expression emerged, and it "was clearl...

Open access initiative from the Company of Biologists

...o have their work published free of charge (in the usual way) or as an author-funded open access paper. Open access is a new mode of publishing, which removes the subscription barrier and allows all internet users completely free access to the material. Authors choosing to take advantage of the open access...

Stanford researcher finds method to define genetic 'words'

...vel genes that are activated in concert with their usual genetic suspects. Other researchers may want to know the function of a gene that's mutated in people with a genetic disease. Kim's database could pinpoint a role for the disease gene, guiding future research in that disorder. Kim added that his data ...

Disease-causing genetic mutations in sperm increase with men's age

.... The mutated versions of FGFR-2 don't bind to its usual targets with the same affinity, perhaps contributing to the sperm's likelihood of fertilizing an egg, the researchers suggest. The scientists looked for the two FGFR2 mutations in sperm from two groups of men who did not have children with Apert syn...

Hopkins is first US institution to obtain powerful genotyping system

...tion (i.e., some people have an "A" instead of the usual "C"), that position is said to have a single nucleotide polymorphism, or SNP (pronounced "snip"). Several million SNPs already are known. Geneticists have successfully correlated SNPs or other mutations with the incidence of some rare diseases such a...

Envisat focuses on carbon-rich peat swamp forest fires

.... In 2002 a weak El Nino meant another drier than usual year: thousands of fires were again observed, and haze conditions spread all the way to Singapore. But this time ESA's newest and most advanced environmental satellite was watching from orbit. "We've made use of Envisat to monitor and analyse this d...

Invasive aliens

...s. Yet the wild swine seem not to suffer from the usual problems associated with this phenotype. I. Lehr Brisbin of Savannah River Ecology Laboratory and colleague Michael Sturek of the University of Missouri will discuss their studies of the free-ranging swine and their potential to shed light on the ev...

Canadian-led study identifies which colon cancer patients benefit from chemotherapy

...colon cancer patients. "This study shows that the usual type of chemotherapy is effective for about 83 per cent of colon cancer patients," said lead author Dr. Steven Gallinger, a surgical oncologist at Mount Sinai Hospital and University Health Network, as well as Professor of Surgery at University of To...

University of Rochester scientists test new method to attack cancer

...vide, unchecked, thousands of times instead of the usual 50 to 100. Over time, a few cancer cells can multiply into a golf-ball-sized tumor or spread to other parts of the body. Since researchers discovered the important role telomerase plays in most cancers in the mid-1990s, much attention has been focuse...

Xyzal shows significant improvements in quality of life for persistent allergic rhinitis sufferers

.... Loss of productivity at work and in performing usual daily activities due to allergic rhinitis or comorbidity was halved (-59% and 52% respectively) with the active treatment, relative to placebo. 1 During the 6 months of the study, 16.5% of patients in the placebo group stopped their treatment due t...

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