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Tag: "measure" at biology news

Special Imaging Study Shows Failing Hearts Are 'Energy Starved'

...ey first performed MRS on 14 healthy volunteers to measure cardiac CK flux at rest and with pharmaceutically ...istories of heart failure were similarly tested to measure the CK flux. Results showed that CK flux in healthy hearts is adequate to supply energy to the heart...

Vascular structure and function improve with diet and exercise

...acity on the program. Treadmill tests were used to measure exercise capacity (VO2 max, the maximal volume of ... of the heart to relax. Left ventricular mass is a measure of end organ damage often following the onset of LVDF abnormalities. The brachial (arm) and carotid...

Children's taste sensitivity and food choices influenced by taste gene

... type AP had one of each. To provide a behavioral measure of sensitivity to bitter taste, children ?who were between 5 and 10 years of age - and mothers categorized three concentrations of a bitter-tasting compound (propylthiouracil; PROP) as tasting either "like water" or "bitter or yucky." Having a bitte...

Molecular Motors Cooperate In Moving Cellular Cargo, Study Shows

... stepping along filaments called microtubules. To measure such minuscule motion, Selvin and colleagues at Illinois developed a technique called Fluorescence Imaging with One Nanometer Accuracy. The technique can locate a fluorescent dye to within 1.5 nanometers (one nanometer is a billionth of a meter, or a...

Polymers with copper show promise for implanted sensors

...ys that interfere with their ability to accurately measure blood chemistry. In the bloodstream, clots form on the surface of implanted sensors or blood vessels contract around them. Sensors implanted under the skin may become walled off by cells that flock to the site as part of the inflammatory response. A...

Biodiversity hotspots identify conservation priorities

...e else) and degree of threat. Plants are used as a measure of endemism, and each of the hotspots holds at least half a percent of the total diversity of vascular plants as endemics; this translates to 1,500 species of vascular plants found exclusively within its boundaries. Degree of threat is determined by ...

New Drugs For Bad Bugs: UF Approach Could Bolster Antibiotic Arsenal

...ed microdialysis that uses a small needle probe to measure how much of a drug actually ends up in the fluid s...ient at the actual site of an infection. They then measure how quickly the bacteria are killed or see if they regrow, and use mathematical modeling to estimate...

Gray wolves maintain the food chain in winter

... rebounding wolf population, field researchers can measure the magnitude of this predicted buffer effect. The models described here can guide their efforts and help species adjust to major environmental shifts like climate change. Crucially, Wilmers and Getz's study shows that a robust food chain - including...

Nanoparticles offer new hope for detection and treatment

...t, you can get a visible signal that allows you to measure how much medication got to the tumor," Lanza says. "You would know the same day you treated the patient and if the drug was at a therapeutic level." Using nanoparticles, drug doses could be much smaller than doses typically used in chemotherapy, mak...

Love's all in the brain: fMRI study shows strong, lateralized reward, not sex, drive

...dence that self-report questionnaires can actually measure brain activity." Aron also noted that the research answered the "historic question of whether love and sex are the same, or different, or whether romantic passion is just warmed over sexual arousal." He said, "Our findings show that the brain areas ...

Revolutionary nanotechnology illuminates brain cells at work

Until now it has been impossible to accurately measure the levels of important chemicals in living brain ...he nanosensors were introduced into nerve cells to measure the release of the neurotransmitter glutamate--the major brain chemical that increases nerve-cell ac...

Scientists journey to southern Africa to unravel the secret world of elephant communication

...and vital message that we are not, after all, 'the measure of all things.'" Planthoppers and pachyderms Larom met O'Connell-Rodwell in Etosha in 1992, the year she began her work at Mushara. "I started doing research on elephants for the Namibian Ministry of Wildlife and Tourism," she recalls. "I was looki...

First technology to remove prions that cause vCJD from blood launched

...best, we must prepare for the worst and take every measure available today to safeguard the blood supply. Pall Corporation developed the Leukotrap Affinity Prion filter to help blood authorities around the world stop the transmission of prions as part of the Company's mission to ensure the safety of the glo...

Oceans more vulnerable to agricultural runoff than previously thought, study finds

...g near the surface of the sea. "These instruments measure the level of greenness in the water," explained Kevin Arrigo, associate professor of geophysics. "The greener the water, the more phytoplankton there are." Dramatic results Stanford doctoral candidate J. Michael Beman carefully analyzed dozens of S...

Study reveals dramatic difference between breast cancers in US and Africa

...rchers studied the pattern of gene expression -- a measure of which genes were turned on and active -- in breast cancer tissue from 378 women in Nigeria and Senegal. They compared the results with a database of breast cancer tissue from 930 Canadian women compiled by Charles Perou and colleagues in North Car...

Road salt affects mitigation wetlands

...s monitoring two PennDOT-installed data loggers to measure the amounts of salt that enter the designated runoff wetland and one other that is slightly affected by splashover from salt spreading and snow melting. The data loggers record salinity hourly. "Salt levels in the runoff wetland reach peaks that are...

Measuring Enzymes At End Of Cancer Pathway Predicts Outcome Of Tarceva, Taxol

...o shows that we have a technology that can rapidly measure the true activity of CDK2 in a tumor sample," Ueno... of Kobe, Japan, the researchers devised a test to measure CDK activity and the expression, simultaneously. They found that monitoring of two isotypes of CDK ...

Brain May Be Less Plastic Than Hoped

...e study also establishes fMRI as a valid method to measure reorganization in the monkey brain, Smirnakis added. Similar studies could one day show scientists how to help the brain to recover from injuries. “In humans, studying brain reorganization is difficult. Cortical injuries are not happening in a contro...

Doing a spin with DNA

...sensitive measuring devices, the researchers could measure various parameters such as the friction of the rotating DNA in a cavity of the enzyme. The research has provided new insights into the interactions between DNA and the enzyme, which are of fundamental importance for understanding cell division. DNA ...

Finding hidden invaders in a Hawaiian rain forest

...ible and Infrared Imaging Spectrometer (AVIRIS) to measure leaf nitrogen and water content from the aircraft, and corroborated the data on the ground. The fingerprints showed where the native dominant tree 'ohia' (Metrosideros polymorpha) has been taken over by the invading Canary Islands tree, Myrica faya, ...

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