Evidence | Page 154 of 200 | SpiritIndia.com

Infectious Disease :: GreeneChip – New diagnostic tool identifies multiple pathogens

Researchers in the Greene Infectious Disease Laboratory at Columbia University’s Mailman School of Public Health and their colleagues in the WHO Global Laboratory Network have developed a new tool for pathogen surveillance and discovery — the GreeneChip System. The GreeneChip is the first tool to provide comprehensive, differential diagnosis of infectious diseases, including those caused by viruses, bacteria, fungi or parasites.

Body Mass Index :: Blame our evolutionary risk of cancer on body mass

A key enzyme that cuts short our cellular lifespan in an effort to thwart cancer has now been linked to body mass.Until now, scientists believed that our relatively long lifespans controlled the expression of telomerase — an enzyme that can lengthen the lives of cells, but can also increase the rate of cancer.

Geology :: January-February 2007 GSA BULLETIN media highlights

Geology topics of interest include: Two New Zealand supervolcanoes that erupted only days or weeks apart; remarkably detailed K-T boundary evidence from the tropical Atlantic’s Demerara Rise supporting a single impact event; and human impact on continental erosion and sedimentation.

ADHD :: Does Omega 3 protect against ADHD?

A new study will provide further understanding about the effects of omega-3 fatty acids on the brain function of children with Attention Deficit Hyperactivity Disorder (ADHD).

Stent :: FDA panel will weigh evidences to recommend the use of drug-coated stents

Dr. Daniel G. Schultz, director of the Center for Devices and Radiological Health at the Food and Drug Administration will be holding the hearings to recommend stricter regulation on the use of drug-coated stents on thursday.

Gendered division of labor gave modern humans advantage over Neanderthals

Diversified social roles for men, women and children may have given Homo sapiens an advantage over Neanderthals, says a new study in the December 2006 issue of Current Anthropology. The study argues that division of economic labor by sex and age emerged relatively recently in human evolutionary history and facilitated the spread of modern humans throughout Eurasia.

Why do some queen bees eat their worker bee’s eggs?

Worker bees, wasps and ants are often considered neuter. But in many species they are females with ovaries, who although unable to mate, can lay unfertilized eggs which turn into males if reared. For some species, such as bumble bees, this is the source of many of the males in the species. But in others, like the honeybee, workers “police” each other — killing eggs laid by workers or confronting egg-laying workers.

Hormones :: Low doses of arsenic have broad impact on hormone activity

Dartmouth researchers report that three different steroid hormones all show similar responses to arsenic, suggesting a broader effect and a common mechanism of arsenic on how these hormones function.

Marijuana :: No ‘smoking’ gun – teen marijuana use does not predict drug, alcohol abuse

Marijuana is not a “gateway” drug that predicts or eventually leads to substance abuse, suggests a 12-year University of Pittsburgh study. The study, which found that young men who chose to initiate their drug use with marijuana were no more likely to go on to abuse drugs or alcohol than those who smoked or drank first, calls into question the long-held belief that has shaped prevention efforts and governmental policy for six decades.

Gene :: New clues to how sex evolves

Researchers at the Department of Energy’s Lawrence Berkeley National Laboratory and the University of California at Berkeley have found clues to part of the complex question of how sex evolves, through ongoing studies of the nematode Caenorhabditis elegans. They have identified a key family of genes that code for closely related zinc-finger proteins that help bring C. elegans chromosomes together during meiosis, the specialized cell division that produces gametes, or sex cells.