Tag: "indirect" at biology news

First direct evidence that environmental oestrogens affect sperm fertility

...l have a significant effect. "Other studies, using indirect tests that do not assess actual sperm function, ha...ect sperm. Our study is the first to provide both indirect and direct evidence that natural and environmental oestrogens significantly affect sperm fertilising...

Loss of lean body mass in HIV-infected men linked to immunological processes

... (BIA); resting energy expenditure was measured by indirect calorimetry taken after four hours of fasting; (2) cytokine measurements: PBMC were isolated from 20 ml of anticoagulated blood and frozen; (3) free testosterone measurement: serum free testosterone was measured by radioimmunoassay; and (4) other mea...

USF neuroscientists study potential of cord blood cells to rescue aging brain

...ctually the result of replacing lost neurons or an indirect benefit of growth and nutritional substances, known as trophic factors, produced by the stem cells. "The studies by Dr. Zigova should add greatly to our mission of developing non-embryonic stem cell therapies for brain repair," said Paul R. Sanberg, ...

Study shows digestive, liver woes cost nation $85.5 billion annually

...y were $36 billion in 1998 dollars, with estimated indirect costs of $22.8 billion, Sandler said. Our conclus...are straight forward. It is a lot harder to add up indirect costs for such things as such as missed work, time people cant spend doing their other daily activit...

Link found between low birth weight and DNA from mothers

...effects, but we don't know if there is a direct or indirect connection. We believe there may be a genetic component in common, and if we can identify the genes and the mechanism we then can explore why children are at risk." The study is based on data from six generations, extending out to fourth cousin...

Mexican reserves fail to protect monarch butterflies

...g around the decreed areas as well as within them, indirect violation of the 2000 presidential decree," he says. Even so, there is hope. The 2000 decree established a newecosystem-based monarch butterfly reserve system. Besides tripling thearea protected to nearly 140,000 acres, this decree approved use of a...

Findings conclude sustained caffeine intake negates the benefits of creatine supplements

...lieve that the findings from this experiment offer indirect evidence that suggests that facilitation of muscle relaxation may be important to the ergogenic action of creatine supplementation as well as power production during sprint exercises. However, for the athlete in training, the key finding is that sust...

Helicobacter pylori infection most common in early childhood

... may be spread through food, water or by direct or indirect contact. Researchers around the world are trying to develop a vaccine to protect children from H. pylori infection. Until a vaccine is developed, frequent handwashing, especially before eating, is currently the best way method of preventing infection...

Optical tweezers show how DNA uncoils

...y classical biochemical techniques, which are more indirect and rely on averaged results from huge populations of molecules. Under the magnification of an electron microscope, nucleosomes appear to be beads on strings of chromatin. Closer scrutiny shows the beads to be the fundamental organizational units of...

The path to a folded protein, long a subject of debate, appears in many cases to be long and winding

...o refold varied tremendously, offering powerful if indirect evidence that the proteins werent following a single, prescribed pathway from unfolded to folded after all....

Worm neuron research may lead to powerful model for Parkinson's study

...d to the use of C. elegans as a model for PD by an indirect route. The Blakely lab had for some time been studying the dopamine transporter, intrigued by how certain drugs, such as cocaine and Ritalin, block absorption and transport of dopamine in mammals. A few years back, Blakely joined forces with Miller, ...

Eat your veggies: Indirect anti-oxidants provide long-term protection

...that sulforaphane's anti-cancer properties and its indirect anti-oxidant effects are both due to its ability to make cells create a diverse group of enzymes, called "phase 2" enzymes, that protect against cancer by blocking select chemicals from becoming carcinogens. Not previously considered oxidant fighters...

Scientists use seals as 'underwater eyes'

...out these key fish species comes from a variety of indirect evidence such as trawl catches, catches on hooks and from the stomach content of predators. But the camera and data recorders allowed these scientists to accompany the seal as surrogates on their hunts and to record firsthand what the seals and thei...

Influence of gender on upper airway structure and function during obstructive sleep apnea

...earchers have focused on pharyngeal resistance, an indirect measure of upper airway caliber. Another measure is critical closing pressure (Pcrit), a concept based on modeling the upper airway as a simple collapsible tube. Although Pcrit has been compared between subjects with and without sleep apnea, there ha...

Gender issues related to spaceflight: A NASA perspective

...arts (two women and 19 men). It was suggested that indirect vasodilatory effects of estrogen in premenopausal women may contribute to smaller vasoconstrictive responses in women compared with men during orthostatic stress. Ventricular Dysrhythmias New data suggest that cardiac dysrhythmias may be of greater...

New Faculty of 1000 service offers a unique evaluation system for research papers in the life sciences

...authors peers, and a first real alternative to the indirect assessment provided by the journal impact factor Faculty of 1000 has been created to provide a rapidly updated consensus map of the most important papers and trends across biology and so addresses a real need felt by the biological community. Sta...

Geologists find spines make comfy home for some marine organisms

...redators, the spines could protect Spondylus in an indirect way. The epibionts might provide a camouflage cover that could reduce overall predation on the bivalves. Jones is continuing her work by examining the wide range of Spondylus spine forms existing today to see if the different types of spines correl...

Gender and differing rates of brain activity influence the level of reading and language skills for boys and girls

... separated brain sites. This measure serves as an indirect measure of functional connections throughout the brain. When examined over three-month time periods, coherence oscillations (peaks and valleys) reflect changes in functional connects between paired brain sites, independent of whether the changes are ...

Trouble in paradise? 'Natural' pest control requires careful planning, Science authors conclude

...ated the food chain, and to predict the direct and indirect effects of biocontrol agents on species. These webs open up doors for more meaningful research to take place, according to the biologists. Memmott and Henneman collected over 2,000 caterpillars, which they checked for parasitoids. Some 20 percent of ...

Marine methane consumed by consortia of bacteria

...se two very different single-celled organisms, and indirect tests indicated they might be the source of methane consumption," said Dr. Christopher H. House, assistant professor of geosciences at Penn State. "We decided to directly test if these organisms are responsible." The research team explains their ap...

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