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Tag: "measured" at biology news

Agent slows aging in mice

...ter numbers than mice on a normal diet. Scientists measured the difference at a point called median lifespan, when half the control mice had died of natural causes associated with aging. “This is the first time to my knowledge when an agent has been shown to extend median life span in three laboratories,”...

Liver cancer patients with high serum levels of hepatitis B virus face poorer outcomes

...d still the prognosis is dismal. Survival is often measured in months. Researchers, led by Winnie Yeo of th...in the study. For each patient, the researchers measured the level of HBV DNA in the blood before the start of chemotherapy. They also gathered other potenti...

Soils offer new hope as carbon sink

...ng capacity was raised," he said. The trials also measured gases given off from the soils and found significantly lower emissions of carbon dioxide and nitrous oxide (a greenhouse gas more than 300 times as potent as carbon dioxide). NSW DPI environmental scientist Steve Kimber said an added benefit for b...

A new plant-bacterial symbiotic mechanism promising for crop applications

...h higher quantities of nitrogen than those usually measured in leguminous plants which have nodules only on their roots. The researchers sequenced (3) the genes of two bacterial strains of Bradyrhizobium, ORS278 and BTAi1, in order to find out their genetic make-up and identify the genes involved in this ...

Research shows cord blood comparable to matched bone marrow

... blood performed as well as matched bone marrow as measured by leukemia-free survival rates, providing the degree of mismatch was limited and the number of cord blood cells available was sufficient. Furthermore, study participants who received matched cord blood had a 20 percent higher survival rate than mat...

Dual-imaging technique useful before -- and during -- brain surgery

...l, sound, and voice-based tests, whose results are measured by MRI, performed on a high-field-strength (3 Tesla) scanner, with a precise intraoperative guidance system will improve patients’ post-operative speech, movement and memory, and also optimize quality of life for those with brain tumors and other neu...

Nurtured chimps rake it in

...environment enhances their cognitive abilities, as measured by their ability to understand how tools work. The findings have just been published online in the Springer journal Animal Cognition. The scientists compared three groups of chimpanzees: one with a history of long-term stable, social interaction wi...

Children of smokers have more than 5 times higher levels of a nicotine toxin

...h increased amounts of cotinine. Cotinine was measured in 100 urine samples taken from infants aged 12 weeks. Seventy one of the babies had at least one parent that smoked and the parents of the other 33 were non-smokers. The authors say: ‘Smoking babies tend to come from poorer homes, which may have...

Gene therapy study shows safety and statistically significant improvement in Parkinson's disease

...linical symptoms and abnormal brain metabolism (as measured by positron emission tomography, or PET scanning)....ell to metabolic changes in glucose utilization as measured by PET scan. The PET scan data revealed a significant improvement (p<0.001) in brain metabolism ...

Human stem cell treatment restores motor function in paralyzed rats

...that study, significantly improved motor function, measured by a suppression of spastic movements and improved muscle tone, was shown in 40 to 50 percent of the animals tested. A post-mortem study of those animals showed a robust maturation of neurons and an increase in the expression of inhibitory neurotran...

A cherry on top: Tart cherries may alter heart/diabetes factors

...drates not from cherries. The researchers also measured plasma TEAC, a measure of antioxidant capacity in ... In addition to blood measures, the researchers measured the level of fat in the livers of the rats, and the genetic expression of PPAR (peroxisome prolifera...

Hearts of male and female rainbow trout are different

...e as the energy substrate). Oxygen consumption was measured using a calibrated oxygen electrode and data acqui...enated and hypoxic conditions. The researchers measured several indices of contractile performance (resting tension, twitch force, post-rest potentiation an...

'Personality-gene' makes songbirds curious

...s follows. In one behavioural test, the biologists measured the time until a bird had visited four artificial "trees" (see figure 1) after being released in the observation room. In a second test, they quantified the reaction of the bird towards each of two unknown objects that had been put in its cage. One s...

Alien plants attack using 'resource conservation' as weapon, researchers say

...led the amount of light reaching the leaf and then measured photosynthesis and water-use rates. Later, they ground up and analyzed the leaves in a laboratory to determine nutrient content. By calculating the ratio of resource use to the rate of photosynthesis, the scientists were able to determine the resourc...

8 plants from South Africa may hold potential for treating high blood pressure

...te. The fluorescence of the o-phthaldialdehyde was measured to determine the effect of the plant on ACE activity. Plasma ACE activity was determined using rat plasma. The IC50 of the conventional ACEI, captopril was determined to test the sensitivity of the assay. At least three separate determinations wer...

Brain's white matter -- More 'talkative' than once thought

...rain’s white matter, the Johns Hopkins researchers measured activity from individual precursor cells in the corpus callosum, a region of white matter that connects the two brain hemispheres. To their surprise, OPCs were found to have electrical signals produced by the neurotransmitter glutamate, similar to th...

Parasites' impact goes beyond host to affect ecosystem

...uninfected snails. In the field, where researchers measured the macroalgae in three types of bottomless cages -- with no snails (control), uninfected snails, and infected snails -- they similarly saw less reduction of ephemeral algae by infected snails. But when researchers isolated ephemeral, or edible, a...

Dinosaur hearing, listening to muscle noise, quieter cubicles

...laments in the muscle fibers. Muscle noise can be measured using various sensors, such as microphones and eve...ular dystrophy. Muscle stiffness was traditionally measured using external radiation sources (such as a vibrating piston). But the Scripps researchers use a pr...

Chemical maps hint at drug's effects on schizophrenia

...iego, Kaddurah-Daouk said that chemical signatures measured by metabolomics were different for schizophrenia p...hers, in collaboration with Lipomics Technologies, measured 300 different lipids in blood drawn from 50 patients with schizophrenia before and after treatment w...

Bats get the munchies too!

...umed ethanol. It was found that ethanol levels measured in fruit bat breath declined faster after feeding on fructose-containing food, than when the food contained either sucrose or glucose (two other types of sugar). Furthermore when the amount of ethanol in food increased the fruit bats preferred food w...

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