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Tag: "such" at biology news

Research finds that circadian rhythms dominate all life functions

...ing for most physiological functions and behaviors such as sleeping, eating and activity. As a checks-and-...hms that have the capacity to identify patterns in such a large number of genes. Ptitsyn discovered that gene activity oscillates in a "finely orchestrat...

Potent possibilities for parasite attack

...lved in specialized aspects of Leishmania biology, such as the development of L. braziliensis in the hindgut of its sandfly vector, and the restricted reservoir host range seen with L. infantum infections in dogs." Around 350 million people in 88 countries on four continents are at risk of Leishmaniasi...

Runners -- Let thirst be your guide

...need to continually drink a large amount of fluid, such as 8 ounces of water eight times a day. But most p...Verbalis says. “Many of us are often dehydrated to such small degrees, and it does not significantly affect us.” But he adds that endurance exercisers wh...

The kapok connection -- Study explains rainforest similarities

...nd then successfully become established elsewhere, such improbable events become probable over 10 to 15 million years." Dick studied the rainforest form of Ceiba pentandra, a species of kapok that grows taller than a 16-story building, its head poking above the forest canopy. Its flowers produce mor...

Mutating the entire genome

... to find out what defects or diseases arise due to such mutations, and thus what the DNA does normally. ...needed for a mouse to develop a human cancer – and such mice are used to learn how to treat or prevent cancers, says Capecchi. In many cancers, translocatio...

Researchers demonstrate way to control tree height

...rns whether the market for specialty tree products such as this would be strong enough to make it worth th... value where extensive root development is needed, such as in bioremediation of polluted soils or in very windy, limited soil moisture situations. From a...

Reconstructing the biology of extinct species: A new approach

...tracks its position relative to stationary objects such as tree trunks, branches, rocks or cliffs, or the ground. Having a stable image of the environment is especially crucial for acrobatic animals that leap, glide, or fly. To make the discovery, the scientists scanned skull samples of each species,...

How 'memory' T cells curb the spread of viruses throughout the body

...before vaccines were developed, childhood diseases such as measles and mumps occurred only once in a lifet.... CD8 T cells normally reside in lymphoid organs such as the lymph nodes. It was thought that to protect from disease, memory CD8 T cells needed first to...

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

...ctors which influence exposure to passive smoking, such as poorer ventilation or a greater tendency for parents to smoke indoors in winter.’ Sleeping with a parent is a know risk factor for cot death and the authors suggest that one reason for this could be inhalation of, or closeness to clothing or o...

Electric fish conduct electric duets in aquatic courtship

...during courtship allows for further exploration of such topics as mate choice and neural basis of pattern generation in these fish," explained Hopkins, noting that the next step in the research will be to decode the fish transmissions and unravel their meaning....

Surprising origin of cell's internal highways

...ront," or the leading edge, of motile cells. Since such an orientation is needed for directional migration, Kaverina hypothesizes that this subset of microtubules may influence cell motility by facilitating the transport of proteins needed for movement to the cell front. "This new microtubule subset t...

Researchers develop buckyballs to fight allergy

... mast cells are activated, inflammatory substances such as histamine, heparin and a number of cytokines ar... better than any anti-oxidant currently available, such as vitamin E. Free radicals are molecules that cause oxidative stress, which experts believe may be ...

Turn-ons and turn-offs for neurons

...s to switch genes on and off. Neuroscientists need such gene switches to investigate the cause-and-effect relationship between gene activity, neuronal physiology, and animal behavior. Hence, this new research is an important step in both the development of highly reliable gene-switches for experimental ne...

Helping chlorine-eating bacteria clean up toxic waste

...r of microbiology, are now in wide use to detoxify such carcinogenic chemicals as perchloroethylene (PCE) ...s strains under a variety of different conditions, such as exposing them to different chlorinated compounds one at a time, varying the environment or the nu...

Male circumcision overstated as prevention tool against AIDS

... Many international aid organizations are against such mandatory treatment programs for prostitutes as they find them to be discriminatory, violate the individual’s human rights and are perceived as an attack on female prostitutes who are viewed as victims of gender and income inequality. Such organizati...

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

...y the results of this trial and its publication in such a prestigious journal,” said John Mordock, Neurologix President and Chief Executive Officer. “Since the inception of the company, we have been a leader in developing gene therapy for neurological disease, and we feel that rigorous peer-review and pub...

Ancient retrovirus sheds light on modern pandemic

... of the retroviruses that currently infect humans, such as HIV-1," Emerman said. "In the end, this drove h...than the ones that have affected us only recently, such as HIV."...

Ice Age extinction claimed highly carnivorous Alaskan wolves

...n scientists have realized. To the list of victims such as woolly mammoths and saber-toothed cats, a Smithsonian-led team of scientists has added one more: a highly carnivorous form of wolf that lived in Alaska, north of the ice sheets. Wolves were generally thought to have survived the end-Pleistocene ...

AAAS decries latest stem cell veto

...d Parkinson’s disease. The bill would mandate that such research be allowed to compete for federal funding...ing that he has chosen to maintain restrictions on such a promising area of research. AAAS will continue to support the interests of scientists and patients...

Experts predict Tamiflu could halve the pandemic influenza death toll versus no intervention

...ne versus no intervention. Adding other strategies such as school closures further reduces the attack and death rate and provides a health benefit at a reasonable cost. The research also showed that pre-pandemic vaccination programmes would play an important role but their effectiveness would be dependent...

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