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Tag: "experiment" at biology news

Darkness unveils vital metabolic fuel switch between sugar and fat

...d dark, an unexpected finding. They repeated the experiment in mice with natural, or "wild type," genomes and three strains of mutant mice with impaired circadian rhythms. The wild-type mice and two of the mutant strains exposed to regular light-dark cycles showed no sign of the gene's expression in their ...

Stanford study of owls finds link in brain between sight and sound

...ly in primates - is also used by birds. "What our experiment demonstrates is a fundamental principle of how the brain pays attention," said the paper's senior author, Eric Knudsen, PhD, the Edward C. and Amy H. Sewall Professor of Neurobiology. "The promise here is that because we are doing this in owls, we ca...

Lactic acid not athlete's poison, but an energy source - if you know how to use it

... and oxidation, or burning, of lactic acid. "This experiment is the clincher, proving that lactate is the link between glycolytic metabolism, which breaks down carbohydrates, and oxidative metabolism, which uses oxygen to break down various fuels," Brooks said. Post-doctoral researcher Takeshi Hashimoto and s...

Study in Science holds promise for a new approach to drug therapy

...ell. Smrcka's team performed a computer-simulated experiment to see which drug-like molecules from an existing database of 1990 known structures would bind tightly to the hotspot, and to rank them. In general,tight binding suggests that a drug candidate has the potential to remain bound to its target long enou...

Weizmann Institute suggests that immune cells help to maintain cognition and brain cell renewal

...ells play a role in this process they repeated the experiment using mice with severe combined immune deficiency (scid mice), which lack T cells and other important immune cells. Significantly fewer new cells were formed in those mice. On repeating the same experiment, this time with mice possessing all of the i...

Flu not the only germ threat this time of year

...sh their hands." In the early 1990s Falsey led an experiment involving hand washing among staff members at an adult day care center. She found that respiratory infections were less frequent among residents cared for by workers equipped with packs containing germ-killing hand gels who used the gels regularly. T...

Stanford/Packard scientist's data-mining technique strikes genetic gold

...ls, or in many other experimental conditions. Each experiment generates thousands of pieces of data about the cell's genes. Although biologists use the technology routinely, focusing only on the few results pertinent to their particular research topic, most scientific journals require that their authors submit ...

UC Riverside psychologist explores human perception, finds 'wow factor'

...tion than people might expect, Rosenblum said. One experiment asked subjects to listen to recorded sounds and try to recognize where on campus the recordings were made. "We picked different places -- a men's bathroom, the old gym, a walk-in closet -- and it turns out that people are terrific at it," Rosenblum ...

Not just the birds

...ute," state the researchers in their study. The experiment The Aleutian archipelago has over 450 islands in the highly productive North Pacific Ocean and Bering Sea. In the harsh northern climate, the islands are covered in maritime tundra and nutrient-impoverished soil. With no native mammals, vast popul...

Researchers discover way to transport environmental arsenic to plant leaves in new clean-up strategy

...shoots than in natural wild-type Arabidopsis. This experiment identified the active mechanism for sequestering arsenic in roots. "We want a 35- to 50-fold increase in these plants' ability to sequester arsenic," said Meagher, "and now that we understand the mechanism, we believe that is possible." Indeed, it a...

BioMed Central launches Biology Direct

...Biology Direct: "We were compelled to launch this experiment because, while scientific publishing cannot be effective without peer review, we saw flaws in the current, predominantly, anonymous review system that run too deep to be rectified without a radical departure from the standard practices. It is our hop...

ASU researchers find link between social behavior, maternal traits in bees

...age and measured their ovaries. Results from the experiment validated her hypothesis, showing that pollen collection was primarily conducted by worker bees with larger ovaries, cementing the connection between high pollen-hoarding strains and reproductive traits. Amdam also found it remarkable that other phys...

'Prosthetic' retinal cells let blind mice see light

In an experiment that could offer a new pathway to restoring vision in people with inherited retinal degeneration, researchers have engineered cells in the eye to be light sensitive that were not before. Using a harmless virus, they introduced a gene for a light-sens...

Biodiversity key to sustainable biofuel according to University of Minn. researcher's findings

...ta -- gathered over a sufficient time period in an experiment that controlled biodiversity ?to confirm the theory. The time period of the study allowed researchers to evaluate the average net effects of diversity on resistance to and recovery from drought, pests, disease and other disturbances. Tilman and his c...

Just the expectation of a mirthful laughter experience boosts endorphins 27 percent, HGH 87 percent

...cts had blood drawn just before the video watching experiment began (baseline), four times during the hour-long ...times afterward. "One of the keys in this kind of experiment is to set the baseline and control environment carefully," Berk said. "In this case, the control gro...

Study shows hope for ridding lakes of clawed invader

...ators. The big hope, says Carpenter, is that the experiment will expose a "tipping point," where the combinati...n lakes and streams. The practical upshot of the experiment and the real hope, say Vander Zanden and Carpenter, is that the experimental techniques used on Spar...

UC San Diego biologists solve plant growth hormone enigma

...lopment. "Plant biologists have wanted to do this experiment for a long time, but only recently have new genetic tools such as 'reverse genetics' and 'activation tagging' made it possible," explained Youfa Cheng, a postdoctoral fellow working with Zhao. "Even with the advances in technology, it took about thr...

Ritalin packs punch by elevating norepinephrine, suppressing nerve signal transmissions

...and emotional areas of brain. Next steps "This experiment adds to our knowledge of what the drug is doing at the cellular level and gives us a springboard to other studies," Waterhouse said. "One question now is, how does the individual's perception of what is an important stimulus factor into the equation?...

In a technical tour de force, Salk scientists take a global view of the epigenome

...he plant world - in one big sweep. "In a single experiment we recapitulated 20 years worth of anecdotal findings and then some," says senior author Joseph Ecker, Ph.D., a professor in the Salk Institute's Plant Biology Laboratory. "Previously, only a hand full of plant genes were known to be regulated by met...

Scientist-astronaut sends T-cells into space

...this Saturday, Sept. 2, 2006, to prepare a crucial experiment designed to demonstrate how human immune response ...ber 14 and September 18, 2006. "We're doing this experiment because many astronauts are immunosuppressed during flight. Their T-cells stop working in microgravi...

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