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Tag: "doesn" at biology news

To sea or not to sea: When it comes to salmon sex, size sometimes doesn't matter

The ones that stay and the ones that stray are biological puzzles among Pacific salmon, of whom the vast majority ?but not all ?travel thousands of miles to sea and back to the streams where they hatched. . .. Just p...

What the eye doesn't see

The first experimental evidence that birds can be deceived by camouflage in the same way that humans are deceived, is published today in Nature [3 March 2005]. .. . Innovative research from the University of Bristol provides the strongest e...

Study finds evolution doesn't always favor bigger animals

Biologists have long believed that bigger is better when it comes to body size, since many lineages of animals, from horses to dinosaurs, have evolved into larger species over time. . .. The scientists found that populations of tiny crustaceans retrieved from deep-sea sediments over the past 40 million years grew bigger and evolved into lar...

'Failed' experiment yields a biocontrol agent that doesn't trigger antibiotic resistance

MADISON - A failed experiment turned out to be anything but for bacteriologist Marcin Filutowicz. . .. The discovery also led to the startup of a promising new biotechnology firm that has already brought Wisconsin a dozen new, high-paying, highly skilled jobs. Filutowicz is a professor of bacteriology in the University of Wisconsin-Madis...

Why doesn't the immune system attack the small intestine?

Answering one of the oldest questions in human physiology, researchers at Dana-Farber Cancer Institute have discovered why the body's immune system - perpetually on guard against foreign microbes like bacteria ?doesn't attack tissues in the small intestine that harbor millions of bacteria cells. . In a study in the February issue of Nature Immunology, and which is currently available on the journ...

Misusing vitamin to foil drug test may be toxic; plus, it doesn't work

Taking excessive doses of a common vitamin in an attempt to defeat drug screening tests may send the user to the hospital—or worse. . .. Both adult patients suffered skin irritation, while both adolescents had potentially life-threatening reactions, including liver toxicity and hypoglycemia (low blood sugar...

Vitamins: Science doesn't always match policy

Some one hundred years after the first vitamin was named, what is known about them has not translated into beneficial, standardized recommendations for public health, says Irwin Rosenberg, MD, University Professor, and director of the Nutrition and Neurocognition Laboratory at the Jean Mayer USDA Human Nutrition Research on Aging (USDA HNRCA) at Tufts University. Based on his presentation at the...