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Tag: "that" at biology news

Researchers discover molecule that causes secondary stroke

...nitial stroke. "Normally the cerebral spinal fluid that envelopes the brain carries off wastes and exchang...ontribute to the development of specific molecules that later causes the constricting vasospasm." A research team led by Dr. Clark has now identified the mo...

Study shows nanoshells ideal as chemical nanosensors

...roceedings of the National Academy ofScience finds that tailored nanoparticles known as nanoshells canenha...small fraction of the lightinteracts in such a way that it allows scientists to determine theirdetailed chemical makeup. This property, known as Raman scatt...

Gene Vaccine Protects Mice Against Development Of Her2/neu Breast Cancer

Based on successful animal studies, a novelvaccine that uses immune cells as factories to produce Her2/neu...l, Breast Cancer Research,on Nov. 29, 2004, showed that the vaccine protected 86 percent ofexperimental mice against HER2/neu-associated breast cancer, even...

Elephants imitate sounds as a form of social communication

Elephants learn to imitate sounds that are not typical of their species, the first known ...orted in today's Nature, further supports the idea that vocal learning is important for maintaining individual social relationships among animals that separ...

Highly adaptable genome in gut bacterium key to intestinal health

A bacterium that lives in the human gut adaptively shifts more than...hese microbes can be viewed as a 'microbial organ' that lives within the intestine and harvests, stores and redistributes energy from the diet." Because ch...

Researchers find missing genes of ancient organism

Yale scientists report in the journal Nature that the "missing" genes for tRNA in an ancient parasit...enetic kingdom in the Archaea containing organisms that are primitive, parasitic and extremophile, or notable for living in the most extreme environments. ...

Amino acids in nectar enhance butterfly fecundity: A long awaited link

...t known. Thirty years ago, researchers discovered that nectars of flowers pollinated by butterflies conta...unts of amino acids. Recent experiments have shown that butterflies actually prefer nectars with a high amino acid content. These findings led to speculatio...

Scientists identify genetic pathways essential to RNA interference

...hey used the RNAi process itself to find new genes that participate in the gene-silencing mechanism, which...hor. "Imagine short, double-stranded RNA molecules that could be synthesized quickly and inexpensively to silence a single gene. Promising targets could inc...

A comprehensive response to HIV could prevent 10 million AIDS deaths in Africa by 2020

Based on successful animal studies, a novelvaccine that uses immune cells as factories to produce Her2/neu...l, Breast Cancer Research,on Nov. 29, 2004, showed that the vaccine protected 86 percent ofexperimental mice against HER2/neu-associated breast cancer, even...

Ants Genetic Engineering Leads To Species Interdependency

...d for raiding food from the colonies of other ants that theycan no longer feed themselves or raise their younger siblings.Recent work on ants suggests that we may need to add geneticengineering to the list of innovations ants have evolved to employ. Intwo ...

Same mutation aided evolution in many fish species, Stanford study finds

...his is among the first times scientists have shown that the same genetic change is responsible for an evol...recent work carries a few surprises. Kingsley said that the gene in question, called Eda, is an old friend to laboratory researchers who have found that mut...

Papers of DNA Pioneer and Nobel Laureate Francis Crick Added to National Library of Medicine’s Profiles in Science Web Site

...ed the discovery as confirmation of his conviction that the origins and processes of life, including human.... In 1961, he and Sydney Brenner reported evidence that the genetic code is to be read three letters at a time, evidence that made possible the full elucida...

Introduced foxes transformed vegetation on Aleutian Islands from lush grasslands to tundra

...blished this week in the journal Science now shows that the effects of the introduced foxes rippled throug...ands to scrubby, low-growing tundra. It turns out that the nutrient-poor volcanic soils of the Aleutian archipelago can only support dense grasslands if th...

Gene Therapy For Parkinson's Disease Moves Forward In Animals

...her strategy to treat the devastating side effects that occur when treating the disease in its later stage...amage by producing therapeutic levels of a protein that helps nourish brain cells, said Ron Mandel, Ph.D., a scientist with the University of Florida's McKn...

Researchers trace evolution to relatively simple genetic changes

...le of evolution at work, scientists have now found that changes in a single gene can produce major changes...pulations." The answer, based on new research, is that evolution can occur quickly, with just a few genes changing slightly, allowing newcomers to adapt an...

Scientists reveal molecular secrets of the malaria parasite

...ntists who areidentifying new targets for vaccines that would impede the parasiteduring stages when it is ... scientist Neil Hall, the first author ofthe paper that appears in the January 7th issue of Science. "Thestudy's findings will help scientists identify para...

Octopuses occasionally stroll around on two arms, UC Berkeley biologists report

...le of evolution at work, scientists have now found that changes in a single gene can produce major changes...pulations." The answer, based on new research, is that evolution can occur quickly, with just a few genes changing slightly, allowing newcomers to adapt an...

Studies reveal methods viruses use to sidestep immune system

...he common cold. "This work has broad implications that go beyond just the hepatitis C virus, and that's w...ry time we have evolved a gene with a new function that allows us to fight off a virus, the virus adapts and comes up with a new function of its own to coun...

Development of portable infectious disease detector

...able device similar to today's homepregnancy tests that can quickly detect the presence of infectiousdisea...iagnostics LLC, a privately heldCalifornia company that specializes in miniaturized medicaldiagnostics, agreed to collaborate on the development before theh...

Researchers add new tool to tumor-treatment arsenal

...fectiveness of treating tumors by combining agents that damage DNA with a drug that sensitizes cancer cells to these agents. The research, led by George Thomas, PhD, professor at the ...

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