News tagged with fertilized embryos
Some states push back against stem cell research
Mar 11, 2009 |
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(AP) -- A showdown is shaping up in some of the nation's most conservative states over embryonic stem cell research, as opponents draw language and tactics from the battle over abortion to counter President ...
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Headwater stream nutrient enrichment disrupts food web
Dec 17, 2009 |
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Human activity is increasing the supply of nutrients, such as nitrogen and phosphorus, to stream systems all over the world. The conventional wisdom -- bolstered by earlier research -- has held that these additional nutrients ...
Researchers revise long-held theory of fruit-fly development
Dec 17, 2009 |
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For decades, science texts have told a simple and straightforward story about a particular protein—a transcription factor—that helps the embryo of the fruit fly, Drosophila melanogaster, pattern tissues in a m ...
Study reveals lack of diversity in embryonic stem cell lines
Dec 16, 2009 |
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The most widely used human embryonic stem cell lines lack genetic diversity, a finding that raises social justice questions that must be addressed to ensure that all sectors of society benefit from stem cell advances, according ...
Stem-cell activators switch function, repress mature cells
Dec 16, 2009 |
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In a developing animal, stem cells proliferate and differentiate to form the organs needed for life. A new study shows how a crucial step in this process happens and how a reversal of that step contributes to cancer.
Tendons shape bones during embryonic development
Dec 14, 2009 |
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In all vertebrates, including humans, bones, muscles and tendons work together to give the skeleton its characteristic balance of stability and movement. Now, new research uncovers a previously unrecognized interaction between ...
Farms, Fertilizers and Greenhouse Gas Emissions
Dec 10, 2009 |
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(PhysOrg.com) -- Agricultural Research Service (ARS) scientists are front and center in finding out how farming affects emissions of the green house nitrous oxide (N2O).
Mechanism discovered by which body's cells encourage tuberculosis infection
Dec 10, 2009 |
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Scientists have discovered a signaling pathway that tuberculosis bacteria use to coerce disease-fighting cells to switch allegiance and work on their behalf. Epithelial cells line the airways and other surfaces ...
From fruit fly wings to heart failure -- why Not(ch)?
Dec 10, 2009 |
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Almost a century after it was discovered in fruit flies with notches in their wings, the Notch signalling pathway may come to play an important role in the recovery from heart attacks. In a study published ...
Charles Darwin: More than the origin
Dec 09, 2009 |
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Although Charles Darwin is most well-known for his book On the Origin of Species, in which he described the process of natural selection, he greatly contributed to many specific fields within biology. As ...
Brooding fishes take up nutrients from their own children
Dec 08, 2009 |
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In the pipefish, the male cares for the offspring. Apart from the ones he sucks the life out of. The discovery of filial cannibalism in the pipefish is now creating a stir in the research world.
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