Tag: "overall" at biology news

Dirty snow may warm Arctic as much as greenhouse gases

...ease and are considered the Earth’s most important overall climate changing mechanism. Other human influences on Arctic climate change are particles in the atmosphere, including soot; clouds; and land use. Humans create the majority of airborne soot through industry and fuel combustion, while forest and o...

Pesticides choke pathway for nature to produce nitrogen for crops

...fertilizer added and also a significant decline in overall symbiotic nitrogen fixation. The most common ex...cides that interfere with symbiotic signaling, the overall amount of symbiotic nitrogen fixation is reduced. If this natural fertilizer source is not replaced ...

Alzheimer's disease to quadruple worldwide by 2050

...n of Alzheimer’s disease would result in a smaller overall reduction of 9.2 million cases by 2050, because slower disease progression would mean more people surviving with early-stage disease symptoms. However, nearly all of that decline would be attributable to decreases in those needing costly late-stage d...

Massive herds of animals found to still exist in Southern Sudan

...onservation Society will be a key component of the overall development of Southern Sudan.”...

Study shows lizard moms dress their children for success

...e-throated lizards within the population or in the overall population density." According to Sinervo, the density of the lizard population is probably a critical factor. At high densities, the aggressive orange-throated males are so busy fighting with other lizards that they are especially vulnerable to p...

Nurtured chimps rake it in

... in order to retrieve a fruit yoghurt reward. The overall study examined not only whether the chimpanzees understood the properties of the tool, but also whether they understood the reasons why the tool worked. The researchers gave the animals access to small rakes with either a rigid wooden head or a fl...

Marine phytoplankton changes form to protect itself from different predators

...k place over periods of three to six days, and the overall size difference could be dramatic. “When one of these cells changes to the biggest colony form, although it takes a while, it’s like changing from a mosquito to 76 blue whales or 3,000 bull elephants,” Hay explained. “That’s a pretty dramatic diffe...

Restricting hospital-based services during SARS outbreak had modest impact

...to, Ontario, resulted in only modest reductions in overall admissions. In this study, Dr. Michael J. Schull a...spital occupancy. For example, the 12% decrease in overall admissions seen during the SARS restrictions would only offset one-quarter of the number of addition...

Ancient retrovirus sheds light on modern pandemic

...n led by Evan Eichler found the largest difference overall between the chimp and human genomes was the presence or absence of PtERV1," Emerman said. "Chimps have 130 copies of PtERV1 and humans have none." It is believed that retroviruses have been entering the genome for many millions of years, and so hu...

Antarctic icebergs -- Hotspots of ocean life

...are miles of ocean -- the scientists estimate that overall the icebergs are raising the biological productivity of nearly 40 percent of the Weddell Sea’s area....

Ants show us how to make super-highways

...ove the quality of the surface. This increases the overall speed of the traffic and results in an increase in the amount of prey delivered to the nest each day. Professor Franks said: "I think every road user who has ever inwardly cursed as their vehicle bounced across a pothole – jarring every bone in th...

An 'elegant' idea proves its worth 25 years later

...il blood ammonia levels were normal. The patients’ overall survival rate was 84 percent, and 96 percent survived episodes of severe ammonia poisoning. An estimated one in 40,000 live births is a child with a urea cycle disorder, according to Hamosh, who says early and accurate detection can now assure pr...

Mice with a migraine show signs of brain damage

...at during CSD, even though blood flow in the brain overall increases dramatically, some parts of the brain st...: While blood flow increased, bringing more oxygen overall to the brain, there were still pockets of severe hypoxia. The brain was working so hard to restore t...

Madagascan tropical forests return thanks to better management and well-defined ownership

...found to be substantial in the study area, with an overall net increase of 4 % during the period 1993-2000. These dry forests have the highest level of plant endemism (species found only in a particular region) in all of Madagascar and are listed as one of the 200 most important "ecoregions" of the world. Th...

Technique monitors thousands of molecules simultaneously

...that inactivates it needs to take over." With an overall strategy in place, Moeller and his collaborators are working to expand the scope of reactions that can be done. For example, they have carried out the oxidation of an alcohol to form a carbonyl and then used the carbonyl to put a dye down. They place...

Alien plants attack using 'resource conservation' as weapon, researchers say

...ants were more efficient on short-time scales, but overall there was no difference in the long term," Funk said. "We were surprised that the invasive plants were not at a disadvantage under conditions where resources were scarce." Knowing your foe These results have important implications for control...

Risk of lymphoma increases with hepatitis C virus infection

...ystem, so the results may not be applicable to the overall U.S. population. The study population was mostly men (97 percent), the majority of patients were white, and the average age was 52 years. Patients in the HCV-infected group were more likely to have served during the Vietnam era (1964-1975) than were...

Double the death rate from cirrhosis for 'blue collar' men

...in Australia in 2002 (543) and is the 10th largest overall killer of men. Cirrhosis is believed to develop in about 15 percent of people who drink heavily for more than a decade ?three to four drinks a day for men and two to three drinks a day for women. "Lower socio-economic groups appear to have in...

Dealing deadly cancers a knockout punch

...stration is not expected to increase a treatment's overall toxicity. Dual Mechanism Reovirus works by entering and replicating within cancer cells containing an activated ras pathway, a mutation present in about two-thirds of all human cancers. Reovirus enters a cancer cell, makes thousands of copies ...

Chemical maps hint at drug's effects on schizophrenia

... attain a more finely tuned map of an individual's overall health and gain information about how an individual is responding to a particular therapy." In a report presented Friday, May 18, at the Society of Biological Psychiatry annual meeting, in San Diego, Kaddurah-Daouk said that chemical signatures me...

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