New view of evolving genes, proteins to aid bioinformatics
... "and this influence of natural selection gives an external or environment-related direction to evolution by preserving or destroying forms according to their adaptedness." Stoltzfus says that many of Darwin's 20th century followers adopted the view that all non-randomness in evolution comes from natural se...Why monkeys don't hear as well as humans
...xtending from the eardrum to the outer part of the external ear. That smaller shape makes the monkey ear behave more like a seashell. The phenomena that gives a seashell its trademark roar is the small, closed environment. Less air in the shell makes the sound frequencies more susceptible to temperature. "...UCSD researchers create a home for liver cells on a silicon chip
...d for patients with end-stage liver disease, these external devices house pig liver cells or cancerous cell lines that act as a bridge to keep patients alive until a donor liver is available for transplant. Maintaining live, functioning liver cells has been a challenge in all of these devices, and Bhatia hope...Researchers find evidence of aging system that may promote long life
...ut we dont know which brain signals or external environmental signals turn on the aging mechanism, he said. This aging mechanism is something we dont understand at all in humans. But we know something is going on. The neurocircuitry in our brains is similar to that of flies...Sex lives of wild fish: Genetic techniques provide new insights
...," DeWoody says. Nearly all freshwater fish are external fertilizers, which means that while the female deposits some or all of her eggs in a nest, the male swims over the nest and fertilizes the eggs. The female leaves often to find another male to spawn with while the guardian male waits, fanning his t...Researchers study muscle cell damage that occurs when astronauts return from space
...hy, he said. "The cells lose their all-important external boundaries," Dr. McNeil said. The result is that ...lly nourish the cell, and the initial onslaught of external calcium. "The calcium that rushes in through the membrane disruption causes small vesicles or membra...University of Washington professor's new book seeks to rewrite understanding of cell biology
...ces as hormones, enzymes and neurotransmitters for external communication illustrates the role phase transiti... outside, allowing the substance to empty into the external fluid. Recent observations, however, dont show secretion as a passive event. Its almost explosi...Smart polymers provide size-selective switches to turn proteins on, off
...and alter their properties according to changes in external conditions, such as temperature, acidity and light. In the earlier research, Stayton, Hoffman and their colleagues attached tiny smart polymer chains next to active sites on a protein. The idea was that as the polymer changed its properties, it woul...Operation of self-aiming camera modeled on how part of brain works
... superior colliculus helps a babys brain associate external direction with an internal visual reference grid mapping a mothers moving lips to the sound of her voice, for example. In a similar fashion, the researchers model learns to align its sound-source location processing with an embedded visual map. As ...Disadvantaged children perceive more hostility, damaging their hearts
...ce in order to protect themselves against frequent external threats, often translating into an added strain on their cardiovascular systems, according to the study. The study by Edith Chen, Ph.D., of Washington University in St. Louis and Karen A. Matthews, Ph.D. of the University of Pittsburgh fills in some ......erial infections. A year earlier, the incidence of external sores in the Neuse River estuary was 0.18 percent in sport and 0.14 percent in croaker. Overall, Pamlico Sound appears to be rebounding well from the major storms, Paerl said. "The real question is -- if we're going to have 20 or more years of more ...Scientific explanation for success of klapskate
...It turned out that there was a 12% increase in the external power generated by skaters when they wore klapskates, allowing them to go 5% faster. As far as friction with the ice was concerned, there was hardly any difference between standard skates and klapskates. Although the front point of a standard (unhing...LSU researcher finds new petroleum method, receives patent
...he next step is getting support from investors and external sources to construct a pilot operation. Current infrastructure at local refineries and petrochemical plants could be utilized. "It frequently is hard to specify how new knowledge will be used and how initial plans, when modified over years or decad...E. coli bacteria may be more useful than you think
...te rates of flow comparable to those maintained by external pumps. An array of bacteria will be tethered in a microchannel 5 by 20 microns in diameter. (The bacteria themselves are only one micron in diameter and two to four microns in length.) The Arkansas group can manufacture the nanochannels and has devel......ical pattern, and in response to both internal and external influences. The finding, which will be published in the June 8 issue of the journal Science , clears a new path for inquiry in the development of drugs that can create reinforcements for the body's army of immune cells. "The cell isn't just a tabul...Burning now an option to clean up ocean oil spills previously thought incombustible
...experiments, they demonstrated that positioning an external radiant heat source near the spill facilitates ign... use as a quick reference to determine the minimum external heat source needed to facilitate burning. Kulkarni points out, however, that an open water demonstr...Gene therapy restores feeding behavior to starving mice
...n that helps integrate internal hunger signals and external sensory information about food to trigger feeding behavior. A research team led by <a href="http://www.hhmi.org/research/palmiter.html">Richard D. Palmiter , a Howard Hughes Medical Institute investigator at the University of Washington, ...Dinosaurs had a "rostral nostril," says Science researcher
...t issue of the journal Science suggests that the external fleshy nostril of dinosaur noses may have been perched far forward, in a "rostral" position, rather than towards the back of their bony nose opening. In fact, the rostral nostril appears to be the norm for reptiles, birds, and mammals, making it one...Electronic tags reveal transatlantic migrations and breeding grounds of Atlantic bluefin tuna
... a ship. The tags collect data on depth, light and external and internal temperature every two minutes. They also use sunrise and sunset data with sea surface temperature to compute a daily location, yielding tens of thousands of data points. More than 15,000 days of archival data have been collected in the ...... two years, and almost a half-a-million dollars in external funding has been issued to fund 15 different scientific research projects for the benefit of dolphins living in Florida waters, during that time....