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Tag: "decrease" at biology news

Edge density key to controlling gypsy moth spread

...spersers to below the donor threshold." This would decrease edge populations and prevent the periodic surges of growth that expand the territory. Other invading species may also exhibit pulsed spreading. If researchers can determine that the Allee effect is in place, than this same plan of containment might...

Spelling out cancer on the nanoscale

...eedle-aspirated samples was analyzed, confirming a decrease in oncoprotein levels. The new nano-fluidic system was also tested on human tumors by measuring the levels of MYC, BCL2, ERK, and AKT proteins in the lymph nodes obtained from patients with Burkitt’s, mantle cell, or follicular lymphoma. The nano...

Altered perception of reward in human cocaine addiction

... no-longer-rewarding stimuli -- with a concomitant decrease in the ability to inhibit maladaptive drug use. In the experiments, the scientists subjected cocaine-addicted and non-drug-addicted individuals to a range of tests of behavior, cognition/thought, and emotion, while simultaneously monitoring their bra...

Exposure to dioxins influences male reproductive system, study of Vietnam veterans concludes

... a positive result. "It may be construed that a decrease in the risk of BPH is not a harmful effect, but th...In the Ranch Hand group, the risk of BPH tended to decrease with increased exposure to dioxins, but at extremely high exposure levels there was a tendency for t...

PNAS study reveals why organs fail following massive trauma

...ein pathways that diminished their function, and a decrease in signals that turn them on, researchers said. Whether T cells continue to multiply depends on the action of sensitive receptor proteins on their surfaces. Some of the receptors, once activated by signaling molecules, cause the T cell to multiply,...

More kidney cancer is detected and treated early, yet death rate rises

...reatment of small tumors, we would expect to see a decrease in mortality associated with kidney cancer," says senior author Brent K. Hollenbeck, M.D., assistant professor of urology at the U-M Medical School. "Surprisingly, that's not what we found. Our research shows that an increase in detection and treatm...

Changing length of days reverses how estrogen affects aggressiveness in mice

...fects the way estrogen works to either increase or decrease aggression. "It is well known that genes interact with the environment, but scientists often don't understand how this works on the molecular level," Trainor said. "We wanted to find out more about how this interaction takes place in mice." In ...

Pilot study successful in taming allergic reactions to food

... research team. “Egg allergies cause a significant decrease in quality of life for many people, so this study ...showed both an increase in tolerance to eggs and a decrease in the severity of their allergic reactions, Burks said. At the end of the study period, most of the...

Asia's odd-ball antelope gets collared

...regulated hunting resulted in the recent startling decrease in saiga numbers. "Although Mongolia faces stiff conservation challenges as it transitions to a free-market economy, the saiga can easily emerge as a success story with a little scientific input and support for local communities" offers Joel Berger...

Wheat gene may boost foods' nutrient content

...ll increases in wheat's nutritional value may help decrease deficiencies in protein and key micronutrients," said Professor Jorge Dubcovsky, a wheat breeder and leader of this research group. He noted that the World Health Organization estimates that more than 2 billion people are deficient in zinc and iron, ...

Insulin receptor stops progression of Alzheimer's disease

...e the cells regulated by insulin and IGF, and they decrease oxidative stress, resulting in fewer lesions in the brain. "If the diagnosis is suspected or patients are in the early phases of AD, there's a good possibility they could get treatment that will help them. It's possible that in the moderate phase, ...

For super-obese patients, duodenal switch beats gastric bypass

...f excess body weight and consequently had a bigger decrease in BMI. When they were weighed one year after surgery, DS patients had lost an average of 149 pounds compared to 121 pounds for RYGB patients. After three years, DS patients had lost 173 pounds, but average weight loss for RYGB patients had decreas...

Ecstasy can harm the brains of first-time users

...ical Society of North America (RSNA). “We found a decrease in blood circulation in some areas of the brain in...the Netherlands. “In addition, we found a relative decrease in verbal memory performance in ecstasy users compared to non-users.? Ecstasy is an illegal drug t...

A giant among minnows: Giant danio can keep growing

... growth of farmed fish such as Atlantic salmon and decrease the time to get to market size. “The more we understand about growth, the more likely we can come up with acceptable ways to enhance it,?she said. ...

Study suggests evolutionary link between diet, brain size in orangutans

...porary, unavoidable food scarcity may select for a decrease in brain size, perhaps accompanied by only small or subtle decreases in body size," said Andrea Taylor and Carel van Schaik in a report now online in the Journal of Human Evolution. Taylor is an assistant professor at Duke's departments of Biologic...

A human taste for rarity spells disaster for endangered species

...ly strengthened regulations and interventions will decrease the probability of a coveted species' extinction. And until those protections are firmly in place and enforceable, biologists may do well to think twice before reporting a species' decline. ...

New path from estrogen to survival in breast cancer cells described

...NEDD8-modified BCA3, there will be a corresponding decrease in the level of NFkB and the cancer cells will be more sensitive to chemotherapy, Yeh says. "There is a lot we need to sort out, of course, but this is a model of how estrogen may function to promote growth in breast cancer that we can all now work...

Sandia research to focus on early detection of harmful algal blooms

...anced technologies that create new water supplies, decrease demand through water-use efficiency, and provide decision-informing tools to the institutions responsible for balancing supply and demand. ...

High dopamine transporter levels not correlated with ADHD

...levation of transporter levels, though one found a decrease in dopamine transporter levels in a different brain region. "Because these discrepancies could reflect differences in medication or drug-abuse histories among subjects, we designed the current study to investigate dopamine transporter levels in ADH...

Inflammation markers identify fatigue in breast cancer survivors

...for development of novel treatment strategies that decrease this inflammatory response and thwart the fatigue that these patients endure." One component of the marker, Dr. Irwin explained, is a measure of the amount of interleukin-6 receptor (IL-6R) free-floating in the blood of breast cancer survivors compa...

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