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Tag: "measure" at biology news

Successful Test Of Single Molecule Switch Opens The Door To Biomolecular Electronics

...by using the scanning probe microscope to make and measure single-molecule contacts, with molecules designed to bond at their ends with a surface and the probe tip. The second problem has been that these connected molecules have failed to exhibit the predicted electrical properties when tested without a con...

Breakthrough isolating embryo-quality stem cells from blood

...werful beam of infrared laser light to stretch and measure cells one by one. His optical stretcher differs from an existing tool known as optical tweezers in which the light is focused to a sharp point to grab hold of a cell. In contrast, the optical stretcher uses un-focused light. This allows laser beams s...

What the eye doesn't see

...ate at which mealworms were eaten by birds gives a measure of how effective each combination was at preventing detection by a predator. Combinations that gave a better disguise took longer to be seen, and it therefore took longer for the mealworms to be eaten." This research provides the first evidence that...

Microarrays as phenotype

...es in a particular genome -- acting as a surrogate measure of cell physiology, said researchers at Baylor Col...ermine the order of genes and are a good surrogate measure of cell status," said Dr. Gad Shaulsky, associate professor of molecular and human genetics at BCM. ...

Remote control flies? Fly behavior controlled by laser light

...stem actually worked, it wasn't clear how we could measure activation in the neurons in moving, freely behaving organisms," he explains. The breakthrough, he says, came when they decided to target a small set of nerve cells in the fly called the giant fiber system. The giant fiber system controls very speci...

UCLA study assesses cost-effectiveness of Hepatitis B drugs

...ity-adjusted life-year gained, which is a standard measure used in assessing the outcome of health care procedures or services. According to Kanwal, the study showed that only two strategies fell well within this accepted standard: Interferon cost an incremental $6,337 to gain an additional quality-adjusted...

Chemical Engineer Kao Explores Antibiotic Synthesis With DNA Chips

... of that sequence in the added sample. One way to measure gene expression is to measure levels of messenger RNA--that's RNA that translates the genetic information of DNA into proteins. Ac...

Researchers reveal secrets of flying snakes

...d opistoglyphous, or rear-fanged. These back teeth measure only 2 to 3 millimeters long and each has a small groove that runs along the fang's outer edge, where the venom drips down and into the prey. Whether or not the snake's choice of prey is related to its gliding ability is unknown. ...

Proteomics brings researchers closer to understanding microbes that produce acid mine drainage

...re they?,' and the way we do that is go after some measure of gene expression." Banfield and her colleagues at UC Berkeley, Oak Ridge National Laboratory (ORNL), Lawrence Livermore National Laboratory and Xavier University in New Orleans report their findings in a paper appearing May 5 on the Science Expres...

It's electric: Cows show promise as powerplants

...d in each chamber. The researchers used a meter to measure the output of the fuel cell. That output reached a consistent maximum of 0.58 volts. After about four days, the voltage fell to around 0.2 volts, at which time the researchers added fresh cellulose to bring the voltage back up to a higher level. "W...

ORNL, UC Berkeley unravel real-world clues to Earth's mysteries

...ity with a limited number of members. Thus, we can measure and learn about microbial interactions and function distribution in a natural setting without being overwhelmed by an extremely large number of organisms." The research team acknowledges that, although this study provides interesting details of micr...

Researchers use 3-D imaging system to unveil swimming behavior of microscopic plankton

... system, Fish TV, uses multibeam sonar to uniquely measure animal movement. The system allowed the researcher...to sample the animals, reorient the transducer and measure the vertical currents using various methods, including releasing and tracking fluorescent dye and wi...

Blink, and the brain misses it

...nctional magnetic resonance imaging and could thus measure whether the act of blinking--independently of any change in light normally caused by eyelid closure--would influence the level of light-activated brain activity. The UCL scientists found that when volunteers were blinking, brain activity was suppres...

Newly discovered genetic disease sheds light on body's water balance

...UCSF doctors took advantage of new, rapid tests to measure vasopressin in these two infants, they found no detectable levels of the hormone in either child's bloodstream. They concluded that some other mechanism was disrupting fluid homeostasis. "This is a good example of the value of humility about what we...

Breakthrough: Scientists create world's tiniest organic particles

...e so small they can be designed and constructed to measure only a hundred nanometers or so in diameter. A nanometer is a billionth of a meter. Leading the group is Dr. Joseph M. DeSimone, William R. Kenan Jr. Distinguished professor of chemistry and chemical engineering at UNC and N.C. State University. A m...

Purdue scientists may have found key to halting spinal cord damage

...f near non-functionality. "What our group did was measure the levels of acrolein in the injured spines of 25 guinea pigs for several days following an injury," Shi said. "We found that levels of acrolein peak 24 hours afterward, and they remain high for at least a week. Because acrolein has such a long life...

Tufts researchers shine light on firefly mysteries

...aboratory testing in tiny respirometry chambers to measure the carbon dioxide produced during flashing and resting. ...

New vaccine protects more effectively against tuberculosis

...ically engineered BCG could provide an efficacious measure against this threat. ...

Plankton can run, but can't hide from basking sharks

...ern Clyde Sea in Scotland - using pop-up tags that measure swimming depth, water temperature and light levels. The tags were programmed to detach themselves from the sharks at a set time, float to the surface and then drift with the currents like a "electronic messages in bottles", before being washed up on ...

Divergent life history shapes gene expression in brains of salmon

...lt in the past because we lacked adequate tools to measure gene expression," Aubin-Horth says. "As a result almost nothing is known about the molecular basis of developmental plasticity such as that seen among 'sneaker' salmon." ...

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