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Tag: "measure" at biology news

New type of rejection blocker protects kidneys after transplant

...searchers used glomular filtration rate (GFR) -- a measure of the kidney's ability to filter waste -- as an indicator of how well transplanted kidneys were functioning. The GFR was significantly higher at 12 months for patients receiving both the intensive and less intensive belatacept regimens compared to c...

Woods Hole Research Center plans controlled burn in Amazon rainforest

...ccording to Nepstad, "This experiment allows us to measure the impacts of recurring fire on the forest by com...for identifying burned forest by satellite, and to measure the damage caused by the fires. Wherever possible, our burns are also scheduled during satellite ove...

New Scripps Oceanography project to study sediments and ecosystem restoration in Venice lagoon

...k's use of global positioning system technology to measure the actual rate of sinking, to today's understanding of the implications of sediment removal and transplantation. This is a wonderful opportunity to extend this history into important studies of biological and toxicological implications of major publ...

Gap-climbing fruit flies reveal components of goal-driven behaviors

...he researchers found that the flies first visually measure the gap width and then only cross the gap if it is a traversable width. If the chasm is short, flies engage in an extraordinary crossing behavior that the researchers showed involve three motor programs. High-speed video analyses revealed that flies ...

Scientists devise way to measure RNA synthesis on the fly in a live cell

...lly unstable, it has been extremely challenging to measure and characterize the mode of action of RNA molecules within a living cell," Cluzel said. The techniques previously used to study RNA required killing and breaking up a cell in order to extract an RNA molecule. With those techniques, "one cannot dete...

Public collections of DNA and RNA sequence reach 100 gigabases

...formation, such as the results of experiments that measure the activities of thousands of genes, or computational models of entire processes, it is important to celebrate the achievements of the three databases that pioneered the open exchange of biological information." In the late 1970s, as researchers s...

Penguin chicks exposed to human visitors experience spike in stress hormone

...d 6 to 7 days were captured and blood was drawn to measure the level of a hormone called corticosterone. The first sample was obtained within three minutes of capture to establish a baseline because, unlike a hormone such as adrenaline, it takes several minutes for corticosterone to build up in the bloodstre...

Hybrid grass may prove to be valuable fuel source

...d then places a leaf in a chamber, allowing him to measure the rate of photosynthesis depending upon ambient sunlight. Preliminary results show that Miscanthus has a 27 percent greater rate of photosynthesis at midday compared with switchgrass. Nine different fields across the state are being used to help e...

Survival of heart patients on beta-blockers varies greatly with genetic variation

...group according to the hazard ratio, a statistical measure of risk. If further research indicates that beta-blockers are ineffective or create a higher risk in patients with certain variations of beta-adrenergic receptor genes, physicians may modify treatment to improve survival in these patients, according ...

A novel method to measure circadian cycles

...open-access journal PLoS Biology a new method to measure circadian cycles in mammalian cells cultured from ... circadian rhythms; it does not, however, directly measure the signal from the central coordinator of circadian rhythms in the brain, the suprachiasmatic nucle...

'Shifty-eyed' Monkeys Offer Window Into Brain's Social Reflexes

... The researchers used a magnetic coil technique to measure with high accuracy and speed the eye movements of the subjects. Explained Platt, 'Our prediction was that if seeing a monkey looking in one direction or another actually changes where you're paying attention, then you should shift your gaze faster if...

Neurologix announces positive results of gene therapy clinical trial in Parkinson's disease

...activities of daily living (ADL), another standard measure of Parkinson's severity which is recorded by the patients themselves, showed a strong trend toward statistical improvement(p= .06). In addition, fluorodeoxyglucose (FDG)-PET scans at one year revealed that the treated side of the brain exhibited a s...

'Sinkers' provide missing piece in deep-sea puzzle

...ed funnel-like collectors called sediment traps to measure how much food sinks down to the seafloor in the form of detritus. They have also estimated the amount of food consumed by animals on the seafloor. At many locations, they have found that the amount of food collected in sediment traps is significantly...

Envisat and ERS-2 reveal hidden side of Hurricane Rita

...r image. ASAR measures the backscatter, which is a measure of the roughness of the ocean surface. On a basic ... that the radar backscatter can be used in turn to measure the wind. So the Center for Southeastern Tropical Advanced Remote Sensing at the University of M...

When in danger humans are similar to a deer in the headlights

...ers stood barefoot on a stabilometric platform, to measure balance and body sway, and viewed twenty-four pictures from three different categories. They were: pleasant (sports), neutral (objects), and unpleasant (injured or mutilated humans). Posturographic and electrocardiographic recordings were collected. ...

Researchers identify genes associated with lung transplant rejection

...as our first achievement: being able to accurately measure that many genes in small samples," notes Caughey, who is also a professor of medicine at UCSF. "We succeeded way beyond our expectations." The researchers then correlated the genetic test results with results from microscopic pathology examinations,...

Hospitalizations because of chicken pox down dramatically since implementation of vaccine

...aricella vaccine recommendation prompted states to measure and react to varicella as a reportable vaccine-preventable illness. The costs of such monitoring and of responding to outbreaks of varicella (e.g., in day care or school settings) may be substantial and were not included in the original analysis [in ...

'Underground' tunnels discovered as means for communication between immune system cells

...d to look at calcium flux, a well-recognized early measure of stimulation in numerous cell types. The use of a fluorescent dye, which allows direct measurement of calcium levels, would determine if calcium flux occurs before dendritic cells unfurl their veils. With a microinjection tip, they squirted a mixt...

Nanoscale method for investigating living systems

...der to visualize their function and simultaneously measure their current/voltage relationship. "What we found was that quantum dots formed their own pores, which in the long run could mean that we could combine optical activity and readout with direct-current recording of cellular activity," says Blick. Beca...

Scientists use gene transfer technology and common virus to block neuropathic pain in animals

...feels painful. In both rats and people, scientists measure allodynia by touching the skin with a series of fi...ow long it takes for them to do so, scientists can measure the degree of pain the animal is feeling. One week after surgery, some of the rats received injecti...

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