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Tag: "but" at biology news

Priming embryonic stem cells to fulfill their promise

...ome common fixtures at most research universities, but theinnovation reported today in Nature Methods involved using such amachine to spot solutions of proteins rather than DNA. The UCSDresearchers also refined other parameters so that the technique wouldbe reproducible in other research laboratories."Wh...

Growth in the sea comes down to a struggle for iron

...ate the growth of diatoms and other phytoplankton, but something odd occurs as these tiny marine plants c...l is in short supply. Why this happens is unclear, but the answer could be that iron sets off a kind of chemical warfare in the marine ecosystem, according...

Poor prenatal nutrition permanently damages function of insulin-producing cells in the pancreas

...lso was fully nourished during the first two weeks but undernourished during the third week, restricted to only half the amount. It had a dramatic effect. At birth, their babies weighed 23 percent less than the control group. After delivery, all babies nursed and all mothers ate a full diet. "By the tim...

Emory Study Tests Bone Marrow Stem Cells to Improve Circulation in Legs

...th exercise, theblood vessels dilate (get bigger), but clogged blood vessels constrictduring exercise. In some individuals the vascular system corrects theproblem on its own either by forming new blood vessels, called"collaterals," that bypass the blockages, or by repairing the diseasedblood vessels. Thi...

Neuronal 'traffic jam' marks early Alzheimer's disease

...This was a small, initial neuropathological study, but we believe that it is significant," said Goldstein. "We found in the early cases a very strong, statistically meaningful swelling in the neurons." The researchers tested whether they could enhance the pathology they observed in the mice and humans b...

Termites feed through good vibrations

...ct" of signal processing ?how to ignore most noise but have some signals that trigger attention ?that may prove useful in artificial intelligence. CSIRO entomologist Theo Evans says laboratory experiments have found that termites use their ability to detect vibrations to determine which food source is m...

Current human embryonic stem cell lines contaminated UCSD/Salk team finds

...ies, the immune response wassignificantly reduced, but not completely eliminated.In their experiments, the researchers used recently developed probes todetect the presence of Neu5Gc on the cell surface of human embryonicstem cells that had been grown in traditional culture conditions. Thescientists furth...

UCLA Study Shows One-Third of Drug Ads in Medical Journals Do Not Contain References Supporting Medical Claims

...sponded to 37 out of 88 requests for data-on-file, but more than half of the responses indicated that the... Administration screens the drug ads for validity, but the sheer volume makes it difficult to adequately check many of the ads. For example, in 2002, the F...

Mouse brain cells rapidly recover after Alzheimer's plaques are cleared

...mage that seemed to be wellestablished and stable, but clearing out the plaques often led to rapidrecover...ts suggest that plaques might not just causedamage but also somehow actively maintain it.The study, will appear in the Feb. 5 issue of the Journal of Clini...

Genome of deadly amoeba shows surprising complexity, evidence of lateral gene transfer

... food or water. The disease can cause liver damage but more often causes dysentery, a severe diarrhea that is often associated with blood in the feces. Unchecked, the diarrhea associated with the disease can be fatal, especially in children. One field study in Bangladesh found that E. histolytica infecti...

Key molecule in plant photo-protection identified

...mage that seemed to be wellestablished and stable, but clearing out the plaques often led to rapidrecover...ts suggest that plaques might not just causedamage but also somehow actively maintain it.The study, will appear in the Feb. 5 issue of the Journal of Clini...

Antarctic ice shelf retreats happened before

...t rising air temperatures can break up ice shelves but there has been a suspicion for some time that the role of the ocean may have been underestimated. This is some of the first evidence that a shift in ocean currents can actually destroy ice shelves. In this case it's possible that a preceding warm per...

Anti-bacterial additive widespread in U.S. waterways

...decades in hand soaps and other cleaning products, but rarely wasmonitored for or detected in the environ...ury at rates approaching1 million pounds per year, but we have essentially no idea of whatexactly happens to the compound after we flush it down the drain,...

Newly-discovered class of genes determines ?and restricts ?stem cell fate

...stem cells: it directs them to become melanocytes, but simultaneously prevents them from differentiating completely. "It gets the show going, but at the same time, prevents the final act," says Epstein. "I call this dual function a "biological ca...

Timing is everything: First step in protein building revealed

...uild a protein,only to find that it's not one step but two.In a series of experiments, the scientists fou...er eIF1 is released completelyin living creatures, but in our laboratory experiments that is clearlythe case," adds Lorsch. "Even if it isn't released comp...

Tiny particles could solve billion-dollar problem

...lladium-based TCE remediation are well-documented, but so is the cost," said lead researcher Michael Wong...faster reactions times than bioremediation schemes but also tends to be more expensive. One of the major advantages of using palladium catalysts to break ...

Plants, animals share molecular growth mechanisms

... protein complex, known as WAVE, activated ARP2/3, but they didn't know specifically which WAVE protein was the actual switch. Their latest research showed that a WAVE protein they've dubbed DISTORTED3 (DIS3) turns on APR 2/3, which in turn triggers formation of new, growing actin filaments. Because som...

Recent breakthroughs in common adult leukemia highlighted in New England Journal of Medicine

...since discovered that CLL is not a uniform disease but rather a disease that follows two distinct clinical courses in patients. Some patients require no treatment and have a lifespan of more than 20 years after diagnosis. Since the disease most often strikes older adults, the patients whose disease follo...

Plants respond similarly to signals from friends, enemies

...ematodes have not only found a weak link in plants but may be using the very same bacterial machinery aga...n't know the precise structure of Nematode factor, but it appears that the nematodes may have actually acquired genes from rhizobia to exploit this signal ...

The secret to longevity in tubeworms

...luymesi is among the longest-lived of all animals, but how it obtains sufficient nutrient ?in the form of... releasing its waste sulfate not up into the ocean but down into the sediments, L. luymesi stimulates the growth of sulfide-producing microbes, and ensures...

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