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Tag: "relatively" at biology news

Gifts from the sea

... nerve that connects the eye to the brain are both relatively large, making this organism a great model for the ...ther creatures that must cram their nerves through relatively small openings in the skull. The human vestibular (balance) system relies on fluid-filled ear canal...

Vietnam war technology could aid elephant conservation

...ammals in central Africa, as these populations are relatively small and threatened by poaching," Wood says. The team will now work on improving the system by using an array of geophones which will allow them to use beam forming techniques. According to Wood: "Using a geophone array has additional advantages. S...

New mitochondrial DNA gene chip may be early cancer diagnosis tool

...types of cancer. Additional results suggest that a relatively simple diagnostic test using a DNA microarray "chip" could enable early detection of some solid tumors, including lung cancer. Mitochondrial DNA (mtDNA) plays a role in respiration and the cell's energy conversion mechanism. Since the late 1990s, re...

'Punctuated' evolution in the human genome

...n of duplicated DNA fragments, are "punctuated" by relatively brief episodes of duplicative activity. This is th...ithin the pericentromeric region occurred during a relatively narrow window of evolutionary time between 10-20 million years ago. This corresponds to the time per...

Promiscuous Catalytic Activity Possessed by Novel Enzyme Structure

...renyl group, also known as prenylation, produces a relatively large change in the chemical’s biological properties. “The molecule becomes a little bit more greasy, and so the kinds of targets that it might interact with change completely.?/p> “We actually have in our hands now the ability to do things that ...

Stem cell training program to make its Stanford debut

...renyl group, also known as prenylation, produces a relatively large change in the chemical’s biological properties. “The molecule becomes a little bit more greasy, and so the kinds of targets that it might interact with change completely.?/p> “We actually have in our hands now the ability to do things that ...

Gene therapy advance treats hemophilia in mouse models

...t of the normal amount of protein. However, only a relatively small amount of the normal protein level is needed...t be the main source of this protein, but they are relatively easy to target. So we aimed to find a way to get these cells to make more of it. In effect, we're us...

Researchers devise new technique for creating human stem cells

...s, as is currently done with oocytes, which have a relatively small nucleus. An alternative approach of destroying the embryonic stem cell nucleus with chemicals or radiation would induce the cell's suicide program, called apoptosis, he said. Melton emphasized that "at this at this stage in our understanding, ...

Scientists show that tick-borne flaviviruses use a novel mechanism to evade host defenses

...Director Anthony S. Fauci, M.D. "Because this is a relatively new field of study, everything we learn about how these viruses operate is significant. This elegant work opens an array of new questions and research opportunities to pursue as we strive to better understand this family of viruses and develop counte...

Analysis of flower genes reveals the fate of an ancient gene duplication

...University of Leeds, England. Gene duplication--a relatively uncommon event in which a single copy of a gene is transformed into two separate copies--is thought to play a key role in the evolution of new gene functions. Duplications are important because they effectively allow at least one of the gene copies t...

HIV Therapy Greatly Extends Life of Key T Cells, Scientists Find

... remained unclear, note the scientists. Using two relatively new techniques for labeling cells, the team demonstrated that IL-2 therapy can lead to greatly increased numbers of new CD4+ cells. “More remarkable than the proliferation of these cells was how long they lived,?says Dr. Kovacs. The average lifespan ...

Crisis in African fish supplies looms, experts warn Africa leaders

...andawire, senior NEPAD Agriculture Advisor: "For a relatively small investment, the international community has an opportunity to bring about significant improvement in the well-being and physical condition of millions in Africa." A five-point strategy to boost fish production The Fish for All Summit is des...

Leptin-signaling Protein Maintains Normal Body Weight And Energy Balance In Mice

...andawire, senior NEPAD Agriculture Advisor: "For a relatively small investment, the international community has an opportunity to bring about significant improvement in the well-being and physical condition of millions in Africa." A five-point strategy to boost fish production The Fish for All Summit is des...

Researchers identify new catfish family

...'s largest river, the Río Usumacinta. The fish is relatively rare in that the researchers have had a hard time finding many specimens. They collected just one specimen in a recent five-day expedition. The researchers are concerned about the fish's habitat, which is threatened by exploitation of the forests an...

Drug resistance testing in treatment-naive HIV patients is cost-effective

...obably due to lack of data on its benefits and its relatively high cost compared with other routine blood tests. A cost-effectiveness analysis conducted by a group of Boston researchers indicates that performing genotype resistance testing at initial HIV diagnosis--before treatment is started--can effectively...

'Sinkers' provide missing piece in deep-sea puzzle

...ent traps. It turns out that, although sinkers are relatively common, the odds of a sinker even hitting a sediment trap in the open ocean are extraordinarily small. In addition, sinkers often simply disintegrate when they contact a solid object. So either the scientists were not seeing sinkers at all, or if the...

Defect in gene causes 'neuralgic amyotrophy'

... the eye, and sometimes a cleft palate. HNA is a relatively rare disorder: the disease appears in some 200 families worldwide. There is also a non-hereditary form of HNA, called the Parsonage-Turner Syndrome. The clinical picture of this more frequently occurring form - 2 to 4 cases per 100,000 persons - is n...

Quantum dots provide a faster, more sensitive method for detecting respiratory viral infections

...ystem if they want to." The system should also be relatively inexpensive. The most costly ingredient is the quantum dots: A small bottle that contains enough of the material for about 200 tests costs $300. As a result, this could be one of the earliest medical applications of nanotechnology, Wright and Crowe ...

New imaging technology shown to detect pancreatic inflammation in type 1 diabetes

...cer," said Dr. Benoist, "we have been able to move relatively quickly into clinical trials." Dr. Turvey added: "We hope to know soon whether we can use this drug and imaging technique to monitor pancreas inflammation in humans." Now Recruiting for Clinical Trial Joslin investigators are currently recruiting ...

Simple sea sponge helps scientists understand tissue rejection

...ts fingerlike structures make grafting experiments relatively straightforward. In experiments carried out on these sponges this summer, Dr. Fernndez-Busquets and his colleagues are studying the cells and molecules believed to be involved in the process of tissue rejection. By grafting together pieces of differ...

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