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Tag: "measure" at biology news

Most human-chimp differences due to gene regulation ?not genes

...en the two. Using novel gene-array technology to measure the extent of gene expression in thousands of gene...ation during the evolution of modern humans." To measure changes in gene expression from different species, White and Gilad developed the first multi-species...

Nobelist discovers antidepressant protein in mouse brain

..., had increased mobility in a test that is used to measure antidepressant-like activity. They also had more 5-HT1B receptors at the cell surface that were capable of increased serotonin transmission. The opposite occurred when researchers molecularly knocked out the p11 gene in mice. Compared to control mi...

Are dancers genetically different than the rest of us? Yes, says Hebrew University researcher

... Tridimensional Personality Questionnaire (TPQ), a measure of the need for social contact and openness to communication. The genetic and questionnaire results of the dancers were compared with those of two other groups examined ?athletes as well as those who were both non-dancers and non-athletes. (Athlete...

Use of amino acid supplement following a heart attack provides no benefit, may be harmful

...ascular stiffness and improve ejection fraction (a measure of how much blood the left ventricle of the heart pumps out with each contraction). The randomized, double-blind, placebo-controlled trial included 153 STEMI patients; 77 were 60 years or older. Participants were enrolled from February 2002 to June...

Little known DNA repair enzyme may be a tumor suppressor gene

...ascular stiffness and improve ejection fraction (a measure of how much blood the left ventricle of the heart pumps out with each contraction). The randomized, double-blind, placebo-controlled trial included 153 STEMI patients; 77 were 60 years or older. Participants were enrolled from February 2002 to June...

Is the brain wired for faces?

...achine, a high-powered imaging technology that can measure the brain activity of test subjects, and by other behavioral techniques. Subjects were shown pairs of images of similar human faces that had been morphed using computer graphics software, while the researchers observed how brain activation changed fo...

An elephant tail

...ascular stiffness and improve ejection fraction (a measure of how much blood the left ventricle of the heart pumps out with each contraction). The randomized, double-blind, placebo-controlled trial included 153 STEMI patients; 77 were 60 years or older. Participants were enrolled from February 2002 to June...

Predicting successful outcomes in living-donor liver transplants

...re. The study used a simple non-invasive device to measure the dye, making it particularly useful in treating...better outcomes. Since tests traditionally used to measure liver function are not always conclusive, researchers led by Tomohide Hori of Mie University in Tsu ...

Obese people are more sensitive to pain, suggests study

...mild electrical stimulation on their left ankle to measure their pain reflex. The stimulus was given before and after the participants took part in a 45-minute coping skills training session that included a progressive muscle relaxation exercise. The obese patients showed a greater physical response to the ...

Record bonefish

...ags on the fish they catch, they are instructed to measure and release the fish, note their whereabouts, and notify the program of the recapture via the phone number provided. This was the case on Dec. 29, when Dr. Brian Harris, a dermatologist from Fort Myers, Fla., caught one of these tagged fish ?estimat...

Genetically altered mice no longer like cocaine

...e box." The researchers used the video footage to measure each animal's activity level after a cocaine injection. The normal mice on cocaine covered roughly five times the distance than the control mice injected with saline (6 meters vs. 1 meter). In contrast, the cocaine-injected mice with the modified dop...

Taking evolution's temperature: Researchers pinpoint the energy it takes to make a species

... body temperature, scientists could more precisely measure rates of speciation caused by the environment. In the end, it is individual metabolic rate - how fast an organism burns food relative to its body weight - that primarily determines evolutionary rate. And higher environmental temperatures help increas...

Rice scientists make first nanoscale pH meter

...ith comes up with one or two things they'd like to measure with this," said lead researcher Naomi Halas, the ...er could be used instead as an "optical biopsy" to measure the pH inside the tumor with nothing more invasive than an injection. Halas's LANP team created the...

New MRI technique shows emphysema in asymptomatic smokers

...s technology, we have shown that it is possible to measure the severity of emphysema and its progression thro...yperpolarized helium, the researchers were able to measure lung structures with 2½ times more precision than with CT, and 10 times more precision than with con...

Atmospheric ozone recovering in mid-latitudes, report shows

...ratory, noted: "Our study provides a quantitative measure of a key fingerprint that is lacking in earlier st... A new NASA satellite called Aura is continuing to measure ozone in various regions ofthe stratosphere, and these same researchers are involved in the ongoing ...

In-home sensors spot dementia signs in elderly

...usive "activity assessment system" to continuously measure in-home walking speed and overall activity of seven healthy elders and seven elders with mild cognitive impairment. The sensors, which remained in the elders' apartments at a Portland retirement community for up to 60 consecutive weeks, picked up mor...

Marine 'dead zone' off Oregon is spreading

...derwater unmanned vehicle equipped with sensors to measure temperature, salinity, chlorophyll and dissolved o...ment of low-oxygen waters. It's not always easy to measure the biological impact of the dead zones, because many dead animals may be washed out to the deep sea...

Neuronal cell cultures kept on the straight and narrow

...s, which makes it hard to image neuronal cells and measure their activity against the glial background. In a paper in the American Chemical Society's journal Langmuir*, NIST researchers detail a microfluidics technique to culture neuronal cells in relative isolation on a variety of cell-culture surfaces, an...

Production of key Alzheimer's protein monitored for first time in humans

...to be a pivotal cause of the condition. Tests that measure Abeta levels in the cerebrospinal fluid have been available for some time. However, those fixed assessments of Abeta gave no indication of whether the flood of Abeta in patient's brains came from an increase in the mechanisms that make the protein or...

Many cleaners, air fresheners may pose health risks when used indoors

...according to the study. The study is the first to measure emissions and concentrations of primary and secondary toxic compounds produced by these products under typical indoor use conditions, and it examines the potential hazards of small-scale yet widespread utilization of an array of products designed for...

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