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Tag: "half" at biology news

UCSB scientists probe sea floor venting to gain understanding of early life on Earth

...ntific findings in Earth science during the latter half of the twentieth century, and have now become a powerful motivation for research and exploration, according to the National Science Foundation, a major funder of this work. The NSF explains that subseafloor ecosystems may represent both the cradle of...

Topical treatment shown to inhibit HIV and herpes simplex virus infection

... are living with HIV, and women account for nearly half of those infected. As stated by the World Health Organization, unprotected sex is the predominant mode of HIV transmission, and genital herpes plays a major role in the sexual spread of HIV. The researchers conducted a prospective, randomized, doubl...

Poor prenatal nutrition permanently damages function of insulin-producing cells in the pancreas

...ourished during the third week, restricted to only half the amount. It had a dramatic effect. At birth, their babies weighed 23 percent less than the control group. After delivery, all babies nursed and all mothers ate a full diet. "By the time the babies were weaned, at three weeks, the low-birth-weight...

UCLA Study Shows One-Third of Drug Ads in Medical Journals Do Not Contain References Supporting Medical Claims

...out of 88 requests for data-on-file, but more than half of the responses indicated that the information would not be provided due to company policy or because it was proprietary. "We found that almost one-third of the pharmaceutical ads offered no references at all to support medical claims. In addition,...

Anti-bacterial additive widespread in U.S. waterways

...despite large scaleproduction and usage for almost half a century, according to ananalysis conducted by re...Society. "We'vebeen using triclocarban for almost half a century at rates approaching1 million pounds per year, but we have essentially no idea of whatexac...

Found: Missing sequence of the human Y chromosome

...ed between 95-99% homology to sequences on exactly half (11 of22) of the other chromosomes in the human genome, including thepericentromeric regions of autosomes (non-sex chromosomes) 1, 2, 3, 4,9, 10, 11, 14, 15, 16, and 22. This remarkable similarity can beattributed to segmental duplications, a phenome...

Researchers reveal the infectious impact of salmon farms on wild salmon

...han your baby finger ?3 cm long ?and weighing only half a gram. "The youngest fish can be only days old when they encounter a farm," says Krkosek. "Some of these fish are so young their egg sacks haven't been fully absorbed ?even fish this small are infected." The anchored farms, open cages of closely pa...

Female sex hormones play a vital role in defense against sexually transmitted diseases

...eceived no hormones were the most protected. About half the mice in the combination hormone group were also protected and the estradiol-treated group was not at all protected. Similar studies confirmed that a combination of the hormones estradiol with progesterone provided the best protection in vaccinate...

Experiments provide proof of how traveling in groups protects insects

...uing radio transmitters -- each weighing less than half a gram -- to the backs of Mormon crickets in northeastern Utah and northwestern Colorado, Drs. Gregory A. Sword, Patrick D. Lorch and Darryl T. Gwynne showed experimentally that band formation indeed boosted insect survival. Sword is a research ecol...

Experiments provide proof of how traveling in groups protects insects

...uing radio transmitters -- each weighing less than half a gram -- to the backs of Mormon crickets in northeastern Utah and northwestern Colorado, Drs. Gregory A. Sword, Patrick D. Lorch and Darryl T. Gwynne showed experimentally that band formation indeed boosted insect survival. Sword is a research ecol...

Critical role in programmed cell death identified

...many neurons are built, but after birth, more than half are eliminated in the central nervous system in mammals: "It's a common safeguard, to ensure that neurons talk to the right neighbors and make the right connections." Also, if cells do not die on schedule, unregulated growth can lead to tumors and ot...

Gene Therapy For Parkinson's Disease Moves Forward In Animals

...t's not ready for clinical trials.?/p> About a half million Americans struggle with Parkinson's disease, including former Attorney General Janet Reno, former heavyweight boxing champion Muhammad Ali and film star Michael J. Fox, according to the National Institute for Neurological Disorders and Stroke...

Potential Cure for Lymphoma in HIV patients

...ngth of study follow-up wasapproximately two and a half years, with a range of about six months tosix years.All study patients were to undergo autologous stem cell rescue. In anautologous transplant, stem cells are removed from the patient andfrozen for later use. The patient receives high-dose chemothera...

New studies suggest airborne SARS transmission is possible

...fection-two-thirds of patients in the same bay and half of patients in an adjacent bay were infected with SARS, while only 18 percent of patients in distant bays were infected. The Hong Kong researchers, led by Ignatius T.S. Yu, MBBS, MPH, of the Chinese University of Hong Kong, speculate that the increa...

Ice core 'dipstick' indicates West Antarctic ice has thinned less than believed

...ce sheet currently rises 1,000 meters -- more than half a mile -- above a bedrock plateau. Some computer reconstructions indicate it was perhaps twice as thick at the end of the last ice age, also called the Last Glacial Maximum. But evidence from an ice core extracted near Siple Dome from 1997-99, along...

The Shapes Of Life: NIGMS Project Yields More Than 1,000 Protein Structures

...rt of the National Institutes of Health. The first half of this project ?a pilot phase that started in 2000 ?has centered on developing new tools and processes that enable researchers to quickly, cheaply, and reliably determine the shapes of many proteins found in nature. “One thousand protein structures...

New research indicates a 'troubled' greenhouse is brewing

...Paleocene greenhouse spike, which lasted less than half a million years, was a catastrophic release of natural gas from undersea ices and permafrost. "In a remarkable parallel to modern hydrocarbon pollution of the atmosphere, this natural methane oxidized to carbon dioxide and created a global greenhous...

International trial of two microbicides begins

... the fight against HIV/AIDS. Women make up nearly half of all people living with HIV worldwide. "The majority of new cases of HIV infection in women result from heterosexual intercourse, but women may not always be able to insist that their male partners use measures to prevent HIV transmission," notes N...

MetaChip provides quick, efficient toxicity screening of potential drugs

... the fight against HIV/AIDS. Women make up nearly half of all people living with HIV worldwide. "The majority of new cases of HIV infection in women result from heterosexual intercourse, but women may not always be able to insist that their male partners use measures to prevent HIV transmission," notes N...

Newly Discovered Compound Blocks Known Cancer-Causing Protein

...as that permanently activate it have been found in half of all colon cancer and 90 percent of pancreatic cancers, among other cancers. Casey and his colleagues in Duke's Department of Pharmacology and Cancer Biology have already discovered and developed another class of cancer drugs aimed at inhibiting t...

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