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Tag: "experimental" at biology news

Aloe vera coating may prolong freshness, safety of fruits and vegetables

...re well-preserved for up to 35 days under the same experimental conditions, the researchers say. The gel-treated grapes were firmer, had less weight loss and less color change than the untreated grapes, measures which correspond to higher freshness, they say. A sensory panel (10 people) evaluated the quality of ...

Traditional models underestimate extinction rates

... chance of extinction. Drake then used half of the experimental data generated from testing the effects of environ...emographic variation determines extinction rate of experimental populations. PLoS Biol 3(7): e222. ...

Simple explanation for complex pattern of feather development

... Plank Institute. Their findings provide the best experimental evidence for a classical theory for growth of complex biological structures. In the 1950's, Alan Turing, mathematician, pioneering computer scientist and code-breaker, proposed that repeated patterns could emerge through the interactions among chemic...

Monkeys understand numbers across senses

...n of a particular sense, said the researchers. The experimental approach also will lead to further studies explori...key only once and not reward them in any way. This experimental design meant that the monkeys could not learn anything within the experiment and instead were demons...

Computers close in on protein structure prediction

...iled structure of small proteins nearly as well as experimental methods, at least some of the time, according to n...tructures solved earlier by other scientists using experimental techniques, they had the same success rate as the best hitters in major league baseball. "We achiev...

Computer modeling reveals hidden conversations within cells

...student in chemistry and biochemistry, who did the experimental work described in the paper. Once the model consi...icted the behavior of living cells in a variety of experimental conditions, the researchers used the model to infer what was going on inside cells in much greater d...

High carbon dioxide levels spur Southern pines to grow more needles

...be results she obtained from a futuristic open-air experimental forest site at 8 a.m. Eastern Time on Thursday, Aug. 11, 2005 during the 2005 annual meeting of the Ecological Society of America in Montreal. Her work was supported by the United States Department of Energy and the U.S. Department of Agriculture's ...

Variant prion protein causes infection but no symptoms

...rsity of California, San Diego (UCSD). Drawing on experimental concepts first developed at RML a decade ago, the research team exposed two groups of 6-week-old mice to different strains of the agent that causes scrapie, a brain-wasting disease of sheep. Within 150 days of being inoculated with the natural form o...

Whisky fans can drink to crop research

...augh, the research leader, said, "We will be using experimental techniques that have been developed in human and other plant genetic studies to analyse a crop that has huge economic importance. We expect to be able to identify the genes that could lead to improvements in the quality of barley that will be of inte...

Protease inhibitors reach beyond HIV

...elevant, virus-independent mouse models ?mice with experimental hepatitis, Staphylococcal-induced shock, and experimental stroke. In each model, HIV PIs block programmed cell death and improve histology, survival, and fun...

Freeze-dried mats of microbes awaken in Antarctic streambed

... the next several years, the microbial mats in the experimental channel had higher growth rates than mats in adjacent streambeds receiving annual summer water flow, she said. The study showed the new microbial mats were taking up atmospheric nitrogen at a higher rate than mats in adjacent streambeds, increasing b...

Birds and bats sow tropical seeds

...tin America. We hope they will carry the banner of experimental restoration of diversity into landscapes, wherever they go." ...

Agricultural antibiotic use contributes to 'super-bugs' in humans

...ble, or immeasurable by the empirical standards of experimental biology." Given all of this uncertainty, Smith and colleagues suggest that adopting a "precautionary approach" - such as the European Union ban - would be suitable. ### Citation: Smith DL, Dushoff J, Morris G Jr (2005) Agricultural antibiotics and ...

Experimental shingles vaccine proves effective in nationwide study

...inical trials ever, researchers have found that an experimental vaccine against shingles (zoster vaccine) prevented about half of cases of shingles--a painful nerve and skin infection--and dramatically reduced its severity and complications in vaccinated persons who got the disease. The findings appear in the Jun...

Neurotransmitters signal aggressive cancer, offer potential for early diagnosis

...es diseased tissues," Gordon says. "Computational, experimental and instrumental tools are now available to tackle metabolomics and then translate lessons learned at the laboratory bench to the patient's bedside as called for by the University's BioMed 21 initiative." BioMed 21 is a strategic research initiative...

Old drug shows new promise for Huntington's Disease

...ir brains than control mice given water alone. The experimental animals lived 20 percent longer than the control animals, did better on tests of motor coordination, and had less weight loss. "It's a limited study, in that we used the same drug dose on all the animals as opposed to comparing different doses, but ...

Scientists get first glimpse at how plants, most animals repair UV-damaged DNA

...Sciences, Dongping Zhong and his colleagues report experimental evidence of what scientists have long suspected -- that visible light excites the photolyase molecule and boosts the energy of electrons in its atoms. This in turn enables the enzyme to inject an electron into the DNA molecule at the UV damage site t...

Vaginal gel may provide a new approach to HIV prevention

...eazey says. During testing, researchers placed the experimental gels in the animals' vaginas. Thirty minutes later...ienced vaginal irritation or inflammation from the experimental gels. "We felt these inhibitors were likely to be pretty safe. Compounds similar to them have a go...

Tissue regeneration operates differently than expected

...Research, have discovered by a number of different experimental approaches that mesenchymal stem cells only show a rudimentarily developed potential for transdifferentiation processes. All cases in which functional skeletal muscle cells arose from mesenchymal stem cells were based on the fusion of stem cells with...

What Makes The Brain Tick, Tick, Tick: Researchers Gaining New Insights Into Brain's Internal Clock

...d their clockwork colleagues are using an array of experimental techniques to try to identify this "baton" timing signal and to refine the theory. These include studies using genetically modified mice, pharmacological tools, recording of electrical brain signals in ensembles of brain cells and functional magnetic...

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