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Tag: "experiment" at biology news

Bare metal stents deliver gene therapy to heart vessels with less inflammation in animal studies

...o animal arterial smooth muscle cells. In a second experiment using rodents, the researchers detected gene expression with significantly lower restenosis in the carotid arteries of animals with the experimental stents, compared to control animals with conventional, polymer-coated stents. The researchers used a...

Free-energy theory borne out in large-scale protein folding

...ntists at Rice University have combined theory and experiment for the first time to both predict theoretically a...cence," Das said. "The excellent agreement between experiment and theory illustrates that the existence of a well-defined "folding route", at least for large prot...

Genetic analysis of cavefish reveals more about evolution

...m the National Science Foundation. The replicated experiment is a powerful tool for experimental science, but t...be considered a replicate of the same evolutionary experiment that asks how species change in perpetual darkness. A frequent outcome is that the species lose pigm...

Changes to embryos can elicit change in adult fish

...us the biting power) of the jaw increased. "This experiment fuses the traditional disciplines of developmental genetics and evolutionary biology," said Streelman. "We've demonstrated that important functional differences operating in adult organisms are elicited by changes in early development. Our next goal ...

Olfactory system detects pheromones that control reproduction

...sal system, which led us to attempt to confirm the experiment on a wide range of mice," she said. As a control, the researchers performed a separate set of experiments using a non-conditional strain of the pseudorabies virus. These studies confirmed that the virus was capable of infecting all nuclei comprising...

Anyway you slice it, tomatoes cut through drought with new gene

...r example, regular or control tomatoes used in the experiment suffered irreversible damage after five days without water, as opposed to the transgenic tomatoes, which began to show signs of damage after 13 days but rebounded completely as soon as they were watered, according to the study. "This technology c...

Carnegie Mellon U. transforms DNA microarrays with standard Internet communications tool

...tand gene activation. The new method, which blends experiment and computation, strengthens DNA microarray analys...ld be attributed to changes taking place during an experiment -- adding a chemical or changing the temperature, for instance. This aspect of the method provides ...

Sooner is better with cochlear implants, Stanford scientist shows

...implant, the better. "I see this as a fascinating experiment that reveals the tremendous capacity for plasticity in the developing brain," said Eric Knudsen, PhD, the paper's senior author and the Edward C. and Amy H. Sewall Professor at the Stanford University School of Medicine. Most people don't appreciate...

New maps reveal true extent of human footprint on Earth

...ey: "[The Collaboratory] will truly be a brave new experiment that effectively bridges science, decision-making and real-world environmental practice - collectively envisioning a new way to live sustainably." ...

'Dating agency' boosts hunt for disease genes

...e. Then, they can 'date' a collaborator, design an experiment together and make an online wish list of patients' DNAs that they need." The DNA Network provides web access by registered researchers to detailed summaries of data on patients whose anonymity is assured. The researchers hone their hypotheses in co...

Primates harvest bee nests in Ugandan reserve

...nted from Africa to Brazil as part of a scientific experiment to boost honey production in 1956. From Brazil, it invaded the Americas, working its way northward and is now found in southern U.S. states. Dave Roubik has followed the progress of Africanized honeybees in the New World, documenting effects of po...

Contagious obesity? Identifying the human adenoviruses that may make us fat

... tracked weight over three weeks before ending the experiment and measuring the chickens' visceral fat, total body fat, serum lipids, and viral antibodies. Chickens inoculated with Ad-37 had much more visceral fat and body fat compared with the chickens infected with Ad-2, Ad-31 or the control group, even thou...

Predators keep the world green, ecologists find

...ands were left surrounded by water. That ended the experiment because it allowed the animals to redistribute themselves in their own fashion. The overcrowded populations of the plant-eating animals that had been the object of our studies simply dispersed. "The fundamental premise of the whole project was our a...

You will remember this

...de or vice versa. The cue before each word in this experiment told people whether the following word would be seen or heard. These tests were designed to make the subject think about different aspects of a word, including its meaning. The participants' brains were scanned using an EEG (electroencephalogram) sc...

Minimal genome should be twice the size, study shows

...ernative gene. "But when you repeat the knock out experiment by deleting the alternative, the genome can revert to the original gene instead. "Using the knock-out approach you could infer that both genes are expendable from the genome because there appears to be no deleterious effect in both experiments. "I...

Taking a bite out of a fellow worker helps wasps recruit new foragers

...e of the journal Animal Behaviour, he describes an experiment in which he artificially removed active foragers from four wasp colonies to see how new foragers are recruited. He found that biting was directed at certain individuals, who previously hadn't left the nest, to induce them to begin foraging. The rat...

'Uniquely human' component of language found in gregarious birds

... of the Nature study. "There are many ways for an experiment to fail and most failures are not scientifically interesting. I immediately thought: we could do that in starlings." Nusbaum, Margoliash and psychologist Kimberly Fenn had previously collaborated on studies of the role of sleep in speech perceptua...

A link is found between morphine addiction and the tendency to explore

...in extent be applied to humans without the need to experiment directly upon them". This research, published in... after being injected with the drug and is left to experiment the effects of the drug and associates them with the specific characteristics of the the compartment...

How does the brain know what the right hand is doing?

A new experiment has shed more light on the multi-decade debate abo...anet Taylor, one of the authors of the paper. The experiment provides a new and intriguing illusion that sheds light on how we learn to move accurately, as well ...

Scientists design potent anthrax toxin inhibitor

...xin only. Of these, eight became gravely ill. This experiment was the first to show the efficacy of a liposome-based polyvalent inhibitor in animals, says Dr. Kane. Dr. Kane says the recent experiments demonstrate a proof of principle and suggest that polyvalent inhibitors could be used along with antibiotics ...

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