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Tag: "needed" at biology news

Frog peptides block HIV in lab study

...ransparent and may not always be in use. "What we needed to do was stimulate an area of the brain and see if it talks to another part. We have a tool to do that now," says Tononi, referencing one of only a handful of machines in the world capable of stimulating precise regions of the brain from outside the...

Thinking the pain away? Study shows the brain's painkillers may cause 'placebo effect'

..., the amount of additional concentrated salt water needed to maintain participants' pain over time increased...en the ages of 20 and 30, further research will be needed to determine whether the effect occurs in women and in people with various illnesses. The power of p...

Can't serve an ace? Could be muscle fatigue

...ished in the Journal of Physiology, showed muscles needed to work harder to compensate for fatigue, which led to uncertainty about where the limb was. "In the absence of sight, people judge the position of their limbs based on the amount of effort required to lift them against the force of gravity," Profes...

Microreactor efficiently regenerates cofactors for biocatalysis

...rogenase as the enzyme. While further research is needed to improve the performance of individual microreactors, the present work shifts the emphasis from the longstanding problem of cofactor regeneration to a more tangible engineering challenge, Kenis said. "Now we need to integrate a large number of thes...

Oxygen increase caused mammals to triumph, researchers say

...years ago gave mammals the evolutionary boost they needed to dominate the planet, according to Paul Falkowski, Rutgers professor of marine science and lead author of a paper published Sept. 30 in the journal Science. Falkowski and his colleagues have measured the abundance of carbon 13, a byproduct of p...

Biased reporting found in cancer prognostic studies

...g for collecting and annotating data, as well as a needed cultural change within the field of tumor marker research. Citations: # Article: Kyzas PA, Loizou KT, Ioannidis JPA, Selective Reporting Biases in Cancer Prognostic Factor Studies. J Natl Cancer Inst 2005;97:1043?5. # Editorial: McShane LM, Altman D...

Gene therapy advance treats hemophilia in mouse models

...tively small amount of the normal protein level is needed to make the problem milder and, thus, less life threatening. "Hemophilia is considered an ideal candidate for correction with gene therapy because if you could just raise the factor VIII activity from less than 1 percent of normal to within 5 to 10...

New lead reported in tumor angiogenesis

... a pro-angiogenic effect in other tumor types. "We needed to connect the molecular dots." Zeng and his colleagues conducted a series of experiments under carefully controlled laboratory conditions to determine whether, as they suspected, HGF stimulates head and neck tumor cells to release pro-angiogenic pr...

For first time, brain cells generated in a dish

...hers of that nature, the ability to regenerate the needed cell type and placing it in the correct spot would have major impact," said Dr. Eric Holland, a neurosurgeon at Memorial Sloan-Kettering Cancer Center in New York who specializes in the treatment of brain tumors, but who is not connected to the resea...

Engineered molecule amplifies body's immune response

...to the nucleus to increase the expression of genes needed to defend the host against infection. A balance in the amount of Stat signaling caused by interferon is very important. "When interferon levels are too low, the host is highly susceptible to infection," explains Dr. Michael J. Holtzman of the Washi...

Genetic discovery could lead to drought-resistant plants

...mata at some point, both to pick up carbon dioxide needed for photosynthesis and to release oxygen back into the atmosphere. This new information will be important to plant breeders looking to improve crop resistance to drought, as well as to those seeking to understand plants' evolutionary responses to cli...

Survival of heart patients on beta-blockers varies greatly with genetic variation

...ord Hospital in Detroit. "Further investigation is needed to determine whether the effect seen is due to the lack of efficacy of beta-blockers in higher-risk patients or if genotype alone is responsible for a worse outcome." Beta-adrenergic receptors in the sympathetic nervous system respond to adrenaline,...

What comes first…the chicken, the egg, or the bad attitude?

...th less productive hens that "partition" nutrients needed for egg production into their own bodies. "They like to be a little bit more selfish with their nutrients, and continue growing," said Dr. Martin Zuidhof, an Alberta Agriculture researcher who is collaborating with the University of Alberta to solve ...

Crisis in African fish supplies looms, experts warn Africa leaders

32% increase of African fish supply needed by 2020 just to maintain consumption levels Calli...nsion in fish production from aquaculture there is needed by 2020 to maintain per capita consumption levels. Fish and HIV/AIDS in Africa The WorldFish Cen...

Leptin-signaling Protein Maintains Normal Body Weight And Energy Balance In Mice

32% increase of African fish supply needed by 2020 just to maintain consumption levels Calli...nsion in fish production from aquaculture there is needed by 2020 to maintain per capita consumption levels. Fish and HIV/AIDS in Africa The WorldFish Cen...

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

...al activities in the brain." Further research is needed that one day could explain why some people react the way they do to fear, or why they take risks, Olson said. "The question is, are there differences in the neuroD2 gene-coding sequence or differences downstream of the neuroD2 pathway during brain de...

Study shows eutrophic lakes may not recover for a millennium

...s, but a little bit of the nutrient is all that is needed to send aquatic ecosystems into overdrive. Carpenter's model also shows that, unchecked, phosphorus pollution could put Lake Mendota on a fast track to extreme degradation. "There is a potential shift to an extremely degraded state that could occur ...

3D Atlas Will Help Navigate The Spinal Cord

...ic map to a traveller, a map of the spinal cord is needed by scientists studying the spinal cord of humans. Currently the principal animal for spinal cord injury research is the rat. There is no comprehensive and accurate atlas of the rat spinal cord; indeed, the problem is greater: there is no comprehensiv...

Energy management in cells may hold key to cancer defense

... becoming more complex and multiple approaches are needed to find solutions. Witters believes that significant breakthroughs in science can only be achieved through open collaboration, citing partnerships between faculty and students, and between other institutes outside the Dartmouth community. Often r...

Nose odors and mouth odors: The brain distinguishes

...study tested only one food, future experiments are needed to determine whether other food odors produce the same differential brain activations," they wrote. However, the researchers found that the two different chemicals butanol and farnesol did not elicit significantly different brain responses according...

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