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Tag: "analyses" at biology news

Wolves are suffering less from inbreeding than expected

...he present wolf population in Scandinavia. And our analyses have shown that inbreeding is negative, inbred wol...riation of individuals. Together with the previous analyses based on inbreeding coefficients the new direct m easures of genetic variation delivered some surpri...

International team analyzes human genetic variation in key immune region

...-wide scale. The latest findings, particularly the analyses of the HLA gene region, provide new and complementary information that can be integrated with data from the recently completed HapMap Project as well as other genomic efforts, to provide a comprehensive view of genetic variability in the human MHC. ...

How many genes does it take to learn? Lessons from sea slugs

... they may function quite differently. Molecular analyses of Aplysia neuronal genes are shedding light on these elusive processes. In 2000, senior author Eric Kandel, M.D., of Columbia University in New York shared the Nobel Prize in Physiology or Medicine for his work using Aplysia as a model of how memori...

AIDS study challenges conventional treatment guidelines for HIV patients

...Rodríguez and his colleagues report the results of analyses conducted on two large cohorts of HIV-infected pat...over, the results were remarkably similar when the analyses were reproduced separately in each of the two cohorts, and changed only minimally when the investiga...

Looking to a new era in bee research

...e of the challenges faced by honey bees, including analyses of disease resistant pathways and metabolic adaptations to an all floral diet. Several papers address ways that honey bee studies can provide insights into human health. These papers cover the genetic bases of honey bee venom allergens, along with m...

Rhesus monkeys in Nepal may provide new alternative for HIV/AIDS research

...gin rhesus macaques. The researchers did sequence analyses of mitochondrial DNA and examined the distribution...ssociate professor of psychology, said the genetic analyses indicate the Nepali rhesus macaques are genetically similar to Indian-origin rhesus macaques. In add...

Mouse study reveals new clues about virulence of 1918 influenza virus

...y killed young people in the prime of life. Modern analyses of 1918 flu victim autopsy samples show extreme and extensive damage to lung tissues. This observation gave rise to the hypothesis that the 1918 flu virus infection provoked an uncontrolled inflammatory response leading to rapid lung failure and deat...

US infant mortality rate fails to improve

...d 9 percent between 1995 and 2003, according to an analyses by the March of Dimes. Babies born at less than 28 weeks gestation accounted for less than 1 percent (0.7 percent) all live births but nearly half (46.4 percent) of all U.S. infant deaths in 2003. Also, infants weighing less than 1,000 grams or ...

Higher levels of obesity associated with greater health risks

...omen in other examined weight categories. Modeling analyses adjusted for age, smoking status, educational achievement, U.S. region, and physical activity level showed that weight-related risk for all-cause mortality, CHD mortality, and CHD incidence did not differ by race/ethnicity." "There was a positive tr...

How did cactuses evolve?

...lar to the leafless, stem-succulent cacti. "[Our] analyses suggest that several key elements of cactus ecological function were established prior to the evolution of the cactus life form," explain the authors. "Such a sequence may be common in evolution, but it has rarely been documented as few studies have ...

Methane-belching bugs inspire a new theory of the origin of life on Earth

...athways they discovered. The genomic and proteomic analyses of carbon monoxide conversion to methane and acetate, carried out in collaboration with Northeastern's Karger, will appear later this year. The Department of Energy and the NASA Astrobiology Institute sponsored the research. ...

Arctic coring expedition continues to yield new clues

...hor, who conducted the initial, shipboard chemical analyses of all the ACEX core samples. "The ACEX cores clearly show that the Arctic got very warm and wet during the PETM," Dickens said. "Even tropical marine plants thrived in the balmy conditions." In today's oceans, certain species of microscopic p...

Researchers find cause of frontotemporal dementia

...ory clinics in Antwerp, Leuven, and Ghent. Genetic analyses of the DNA from FTDU families identifies defects that cause a shortage of progranulin. Progranulin is known in cancer research, where a surplus of this protein leads to tumors. What it does in the brain, and how it supports brain cells, is not yet kn...

Study identifies new role for breast cancer susceptibility gene

...ulated by BRCA1. The researchers used microarray analyses to identify genes repressed by BRCA1 or a related tumor suppressor, CtIP, in mammary epithelial cells (MECs). Among the 12 genes inhibited by BRCA1 or CtIP was the gene for a secreted factor, called ANG1, that enhances blood vessel growth and maturat...

Scientists discover why cornea is transparent and free of blood vessels, allowing vision

...eam did the following. They conducted chemical analyses that demonstrated that VEFGR-3 and the gene that expressed it were indeed present on the corneal epithelium. Next, in two separate experiments, they compared corneas with and without epithelial layers that were injured. They found that only the c...

CHAVI announces international search for genes affecting HIV response

...nd the University of Lausanne. "Large-scale genome analyses like this are critical for determining the role of the genome in complex diseases such as AIDS," said Huntington Willard, Ph.D., director of the Duke genomics institute. The combination of large population cohorts and state-of-the-art genome technolo...

Magnetism and mimicry of nature hold hope for better medicine, environmental safety

...promises more rapid, more accurate and less costly analyses of water and biological fluids ?blood, urine, saliva ?that require only miniscule amounts of fluids. A detailed explanation of the process is presented in an article published in the July 17 edition of Applied Physics Letters, a leading internation...

One-third of adults with diabetes still don't know they have it

...s study updates and generally corroborates earlier analyses that were based on 2 years of NHANES data," said lead author Catherine Cowie, Ph.D., of the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). "We're seeing a rising prevalence of diagnosed diabetes that is not substantially o...

A catalogue of proteins

...lised in ten different cell compartments. Previous analyses had shown that certain proteins assign themselves clearly to particular cell organelles. When the scientists took the protein complex apart, these proteins were used as markers. Proteins which appear together with these marker-proteins could now also...

Brittle prions are more infectious

...hysiological effects. They also plan more detailed analyses to examine how the molecular structure of a prion protein gives rise to its physical properties. ...

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