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Tag: "mass" at biology news

Mice brains shrink during winter, impairing some learning and memory

... kept in short days had on average a smaller brain mass compared to the other mice, even when taking into account that their overall body mass was smaller, too. In addition, the researchers found changes in a region of the brain ?the hippocam...

Research may provide new link between soft drinks and weight gain

...that favors fat storage. "Our study shows how fat mass increases as a direct consequence of soft drink consumption," said Dr. Tschöp. The research appears in the July 2005 issue of Obesity Research, the official journal of the North American Association for the Study of Obesity (NAASO). Consumption of ...

Roundup®highly lethal to amphibians, finds University of Pittsburgh researcher

...iodiversity and an 86 percent decline in the total mass of tadpoles. Leopard frog tadpoles and gray tree frog tadpoles were completely eliminated and wood frog tadpoles and toad tadpoles were nearly eliminated. One species of frog, spring peepers, was unaffected. "The most shocking insight coming out of ...

New miniaturised chip dramatically reduces time taken for DNA analysis

...es and testing genetic toxicity in new drugs. Once mass production of the sensors begins, their cost and availability will be similar to that of pregnancy test kits found in pharmacies. The researchers Salvador Alegret, Manuel del Valle and Maria Isabel Pividori, all of whom are members of the Sensors an...

Hopkins AIDS experts issue warning about global efforts to provide drug therapies

... discovery of insulin for diabetes in 1922 and the mass distribution of the antibiotic penicillin in 1943. In the case of diabetes, insulin's availability turned a once-fatal disease into a chronic, manageable, lifelong one, like antiretroviral therapy has done for HIV. However, the researchers point out...

Researchers reveal secrets of flying snakes

...light with 16 size and behavior variables, such as mass and snout-vent length, of the animal's body. He found that body length and wave amplitude are important predictors of flight behavior, but wave frequency was not. "These high-amplitude undulations visually dominate the behavior, yet their frequency ...

Team Invents Device For Weighing Individual Molecules

...d, the molecules condense on the bar and add their mass to it, thereby lowering its frequency. In other wo... then able to evaluate extremely subtle changes in mass of the nanodevice, and therefore, the weight of the added atoms or molecules. Roukes says that thei...

Proteomics brings researchers closer to understanding microbes that produce acid mine drainage

...se short proteins, called peptides, with "shotgun" mass spectrometry. To identify the peptides from their masses, they turned back to the genomes. The genomes they obtained last year allowed them to predict the proteins in each member of the biofilm community, and from that predict the protein fragments t...

UCR chemist part of team identifying new areas of gene regulation

...regulation is thought to take place. The team used mass spectrometry to show that acetylation at the core ... location of acetylation. "In this paper, we used mass spectrometry to identify a novel acetylation site at the lysine 56 of yeast histone H3," said Zhang,...

It's electric: Cows show promise as powerplants

...d until it can be completely digested. This liquid mass is what scientists call rumen fluid. The researchers collected the fluid through a cannula, a surgically implanted tube that leads directly from the cow's hide into its rumen. The cow used in the study ate a normal diet. The researchers filled each...

Researchers discover mechanism for multiplying adult stem cells

...s process is reversible, after you have a critical mass of these cells, you can then place them back into the person where they would grow into healthy tissue." "This could be very beneficial for burn victims," Jaenisch adds. Researchers in his lab are also exploring whether activating Oct4 in somatic c...

ORNL, UC Berkeley unravel real-world clues to Earth's mysteries

... several years. Meanwhile, ORNL boasts world-class mass spectrometry instrumentation and its researchers h...n ORNL's Chemical Sciences Division, performed the mass spectrometry work. Manesh Shah of ORNL's Life Sciences Division was responsible for the informatics ...

New Vaccine To Be Used For First Time In Polio Outbreak Response

... second half of May. Yemen had already conducted a mass campaign on 11-14 April, as the country was considered to be at high-risk of polio re-infection from nearby Sudan where an outbreak of polio continues. Experience in polio eradication demonstrates that outbreaks can be quickly contained with high qu...

Male Combat Veterans Rank High In Heart Disease Risk

...rs used the standard definition of obesity, a body mass index of 30 or higher, she said. "Consistent with younger veterans of more recent wars, older men with distant combat exposure had higher odds of heavy smoking, heavy drinking and obesity, but lower odds of physical inactivity compared to non-vetera...

Researchers develop new method for facile identification of proteins in bacterial cells

...tracts of microorganisms using traditional peptide mass fingerprinting (PMF). The key to the new method, a...ssisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS), which identifies protein fragments based on the time they need to trave...

Scientists turn tobacco against cancer

... scientists are seeking industry partners to begin mass production of the antibody. The next step in the work, Dr. Koprowski notes, would be to conduct a phase 1 clinical trial of the monoclonal antibody in colorectal cancer patients. In the meantime, they are studying the effectiveness of monoclonal anti...

Multi-species genome comparison sheds new light on evolutionary processes, cancer mutations

...ly similar genomes. Researchers speculate that the mass extinction opened new ecological niches for mammals, spurring their diversification and the emergence of new mammalian orders. This situation would have facilitated opportunities for the isolation of mammals into more distinct breeding groups, speedi...

Female volunteers prepare for a second 'bedrest'

...gned to counter the loss of muscle, fluid and bone mass and the reduction of certain functions (such as cardiac function and movement). While the control group did not perform any particular activity, an 'exercise' group were put through their paces in regular exercise sessions. In another group, daily m...

Oxygen increase caused mammals to triumph, researchers say

...ments, thanks to two high-precision, isotope ratio mass spectrometers housed in the geological sciences department at Rutgers. There were placental mammals on Earth at the time of the great extinction of dinosaurs about 65 million years ago, Falkowski says. They were, however, tiny, limited creatures; ...

New lead reported in tumor angiogenesis

... tend to be mobile, shifting within the developing mass and possibly establishing tumor-to-endothelial cell contact to prompt angiogenesis. "We have some evidence that inflammatory factors, and even some infectious agents, can induce jagged1 expression," said Wang. "That's what we plan to study next." Th...

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