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Tag: "exposed" at biology news

Insects develop resistance to engineered crops

... frame, all or almost all of the insects died when exposed to pyramided plants alone. "It's easier for an insect to develop resistance to a single toxin," said Shelton. "If an insect gets a jump on one toxin, then it becomes more rapidly resistant to that same toxin in a dual-gene plant. And when one line o...

Attacks of King George III's madness linked to key metabolism molecule

...eport suggested that, ironically, he may have been exposed to arsenic contamination of a substance his doctors gave him as treatment. PGC-1 alpha is a "transcriptional coactivator" that acts as an on-off switch for a number of genes involved in manufacture of glucose in the liver and in the "heating system"...

Study shows how retinoic acid enters a cell's nucleus

..., Noy and Sessler made a startling discovery: When exposed to RA, three amino acids on the CRABP-II molecule ...olecule's structure and amino acids that flip when exposed to a hormone or a drug. Noy currently is working with an ILBP that she has pinpointed as a pro-carci...

Sandia completes depleted uranium study

...ffects, as well as birth defects in the progeny of exposed veterans and civilians. Marshall's study conclude...isk of DU-induced birth defects in the children of exposed individuals, and provided a more detailed analysis of the dispersion of DU following impact with a n...

OHSU research shows vitamin C counteracts some negative impacts of smoking on unborn babies

...tudied as a control group. "We found that animals exposed to nicotine prior to birth had reduced air flow in the lungs compared to animals that were given nicotine and vitamin C. In fact, the nicotine plus vitamin C group had lung air flow close to that of a normal animal," explained Spindel. "Other notable...

Millennium Ecosystem Assessment: Many of 2 billion dryland dwellers at risk as land degrades

... years. These droughts triple the number of people exposed to severe water scarcity at least once in every generation, leading to major food and health crises. ...

Woods Hole Research Center plans controlled burn in Amazon rainforest

...y really are, and also see new areas of the forest exposed to fire as the standing fuel carries the flames higher into the crowns of trees that have managed to survive the ground fires at their bases. Ultimately, Center scientists will burn some areas yearly for several years in a row to carefully monitor fi...

Beetle-inspired switch uses water for bonding

...micrometer-sized droplet on the plate surface. The exposed droplet can then stick to another surface. To break the bond, electricity pulls the exposed water back through the capillary pores. With millimeter-sized water droplets and micron-sized pore...

Scientists devise way to measure RNA synthesis on the fly in a live cell

...ing off and on in a living bacterium as it becomes exposed to antibiotics and other changes in its environment. The technique, which is announced in the Monday, June 13 issue of the Proceedings of the National Academy of Sciences, could help scientists discover new drugs and learn to what extent some RNA mo...

Secrets to antibody's success against West Nile Virus surprise scientists

...s even worked when the virions were simultaneously exposed to antibodies known to enhance infection. "Do the therapeutic antibodies also prevent the virus from properly injecting its genetic material into macrophages? It's a tempting possibility, but we don't have the evidence to prove it yet," he says. ...

Virologist finds contagious equine flu in dogs

...sely monitored. With close to 100 percent of dogs exposed to the virus becoming infected and about 80 percent of infected dogs showing symptoms, the flu could be spreading throughout the country. It was originally documented in greyhounds at tracks and kennels but now is infecting all breeds of dogs. Ongoin...

Temperature regulates circadian clock in zebrafish

...of clock gene expression even after the cells were exposed to constant temperature. Acute temperature shifts can also trigger significant changes in clock gene expression (transcript levels of per4 and cry3 dropped after a temperature increase and spiked after a temperature decrease; cry2 showed the opposite...

Study identifies gene in mice that may control risk-taking behavior in humans

...ew weeks of birth. In one experiment, mice were exposed to an adverse stimulus coupled with a non-adverse stimulus, a tone followed by a mild foot shock. Normal mice crouch down and stop moving the next time they hear the tone, a physiologic response that indicates they expected a shock. The mice remember...

AIDS expert says global strategy needed to combat feminization of HIV/AIDS

...eater risk than men for contracting the virus when exposed to it. 60 percent of people living with HIV in sub-Saharan Africa, are female, Quinn says, and in South Africa, Zambia and Zimbabwe, young women ages 15 to 24 are three to six times more likely to be infected than men. Women make up half the adult p...

Why do aneurysms form? New studies suggest leading role for white blood cells

...and start the "first aid" process. The researchers exposed a small part of the rodent aortas to a chemical th...tas of rats that had been injured with elastase or exposed to control conditions. They also studied mice that had been genetically altered by U-M researchers t...

Naturally occurring asbestos linked to lung cancer

...stos fibers and the determinants of cancer risk in exposed populations. "Because mesothelioma takes 20 to 30 years to develop, what we learn today will allow us to protect Californians from this preventable cancer decades into the future," Schenker said. ...

Opiates Better Than Sedatives For Treating Newborns In Withdrawal

...ures. Between 48 percent and 94 percent of infants exposed to opiates in the uterus develop clinical signs of withdrawal "The interesting information," Osborn says, "suggests that these infants can be treated without admission to the special care nursery unless withdrawal is complicated and that this is fac...

Researchers discover new route to hemoglobin synthesis

...ures. Between 48 percent and 94 percent of infants exposed to opiates in the uterus develop clinical signs of withdrawal "The interesting information," Osborn says, "suggests that these infants can be treated without admission to the special care nursery unless withdrawal is complicated and that this is fac...

The very defensive caterpillar

...gest that the immune response of insect constantly exposed to pathogens in the field may be very different from all the work described in the laboratory. This raises new challenges for the field and places into question the relevance of laboratory based studies on immunity. ...

Newly Discovered Role for Heart Response Enzyme May Yield Better Heart Failure Therapy

...receptors on heart cells when they are chronically exposed to adrenaline and thus preserves heart function. However, it has remained unclear exactly how the heart enzyme exerts its effects on the heart receptors, Rockman added. The researchers' experiments revealed that PI(3)K plays multiple roles as an enz...

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