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Tag: "narrow" at biology news

Wisconsin scientists grow critical nerve cells

...ves into spinal motor neurons. In addition to the narrow time frame, it was also critical to expose the growing stem cells to an array of complex chemical cocktails. The cocktails constitute naturally secreted chemicals - a mix of growth factors and hormones - that provide the exact growing conditions need...

Growth in the sea comes down to a struggle for iron

...ng into two patches and streaming out into a long, narrow strip. The major night-time task was to steam in crisscrossing transects to re-do the map of the patch because of this rapid change," says Wells. The two vessels worked together in the patch for 12 days but operated independently most of the time. N...

Gene variations explain drug dose required to control seizures

...oses required by different patients and the drug's narrow therapeutic index, explained study co-author Nicholas Wood, Ph.D., of the University College London. The therapeutic index refers to the ratio between a drug's toxic and therapeutic dose, used as a measure of the drug's relative safety for a particul...

Open microfluidic and nanofluidic systems

...substrate wettability. Thus, a water filament in a narrow channel that has a width of 100 nanometer can sustain an overpressure up to 15 atm. In contrast, if the channel had a width of one millimeter, the water filament could only sustain a thousandth part of an atmosphere. One relatively simple applicatio...

Researchers add new tool to tumor-treatment arsenal

... variety of cancers," says Dr. Thomas. "However, a narrow therapeutic window, combined with possible severe side effects, has greatly limited their broader use." These factors, says Dr. Thomas, have probably contributed to recent reports of the under-dosing of patients and the failure to blunt the disease....

Implanted Devices Detect High-Risk Heart Failure Patients

...otprint, while those with sick hearts would have a narrow footprint that represents the reduced variance in heart rate response," Gilliam explained. "These footprints provide us with an unbiased ?distinct from the patient's perception ?look at how the patient is truly doing. It is an objective finding that ...

International HapMap consortium expands mapping effort

...denser map that will enable them to more precisely narrow gene discovery to specific regions of the genome. The effort to expand the HapMap is made possible by $3.3 million in additional support from a unique public-private partnership, including the following organizations: the Wellcome Trust, London, $62...

Low level of extinction during ice age linked to adaptability

... and lack of recovery of those that had existed in narrow latitudinal ranges." Powell believes that those brachiopods that existed within narrow latitudinal ranges became victims of the extremes in the annual minimum and maximum temperatures tha...

New tumor-suppressor gene discovered

... likely to occur. "Genetic techniques helped us to narrow our search for this fly's mutation to a few candidate genes within a very small part of one huge chromosome," Lai explains. The scientists narrowed the tumor-causing candidates down to two genes, then performed molecular-biology experiments with them...

Searching the depths of the straits of Florida for disease cures

...ems. The Cay Sal Bank is located on the edge of a narrow ocean channel that funnels water as well as larvae and plankton from throughout the Caribbean, in all likelihood making for a unique habitat that will yield numerous interesting and potentially lifesaving samples during submersible dives as deep as 3...

High-powered gene profiles provide clues to genes involved in common form of lung cancer

...copied regions, respectively. This enabled them to narrow the search for genes that were the targets of the irregular regions. Intriguingly, all of the genes already known to be involved in NSCLC reside within the abnormal regions identified by the Dana-Farber team. "This is compelling evidence that we're ...

Ocean climate predicts elk population in Canadian Rockies

...ad news for elk, which have heavy bodies and long, narrow legs and small hooves. The deeper the snow, the further they sink. Conversely, wolves have relatively light, sleek bodies and big, wide paws that act like snowshoes. In the Canadian Rockies, wolves rely on elk meat for 40 to 70 per cent of their diet...

'Punctuated' evolution in the human genome

...ericentromeric region occurred during a relatively narrow window of evolutionary time between 10-20 million years ago. This corresponds to the time period following the divergence of humans and Old World monkeys, but before the divergence of humans and great apes. For the past 10 million years, however, no ...

Promiscuous Catalytic Activity Possessed by Novel Enzyme Structure

... by using the techniques of genetic engineering to narrow its activity and tell it exactly which reactions to carry out. “The big advantage that we have with our system is that it’s a small, soluble, easy-to-work-with bacterial protein that seems to be able to do reactions that you can find somewhere else ...

Stem cell training program to make its Stanford debut

... by using the techniques of genetic engineering to narrow its activity and tell it exactly which reactions to carry out. “The big advantage that we have with our system is that it’s a small, soluble, easy-to-work-with bacterial protein that seems to be able to do reactions that you can find somewhere else ...

Researchers identify new catfish family

...op of the head" Hendrickson said. "This has a very narrow cranium and the muscles anchor to the sides of the bone instead of coming up on top. That and a number of other characters clearly indicate it has nothing to do with ictalurids." The animal and plant life of Mesoamerica is exceptionally diverse with...

U-M researchers identify new blood test for prostate cancer

...xpress proteins on their surface, and were able to narrow the field to the 22 biomarkers that most often pinpointed the cancerous blood samples. More than 230,000 men will be diagnosed with prostate cancer this year. Current screening methods involve a blood test to check for prostate specific antigen, an...

Virtual animal shelters ?How the Internet is transforming the experience of pet adoptions

...ribed a "Velcro lap dog." Other communications can narrow the selection process on the Internet by suggesting that the pet would be better suited to homes without small children or cats. She says the informative, personal messages differ from the brief descriptions on cages in traditional animal shelters, b...

Researchers find how some antibiotics kill bacteria

... still be sensitive to another. "That may help to narrow down the search for new synthetic derivatives to conquer resistance altogether." The study appears in the current issue of the journal Cell. Ryfamycin antibiotics are one of the first-line treatments for tuberculosis, a disease that is on the rise ...

Gradient guides nerve growth down spinal cord

...njuries. Growing nerve cells send out axons, long narrow processes that search out and connect with other nerve cells. Axons are tipped with growth cones, bearing specific receptors, which detect chemical signals and then grow toward or away from the source. In 2003, University of Chicago researchers repo...

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