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Tag: "while" at biology news

Why do insects stop 'breathing'? To avoid damage from too much oxygen, say researchers

... breathe in oxygen at the same high volume it uses while flying. The result is excess internal oxygen that ...s are underground. As is true for miners, insects, while underground, are faced with high-carbon-dioxide and low-oxygen amounts, necessitating a better venti...

Scientists discover unique microbe in California's largest lake

... Wood. She obtainedsamples containing the organism while studying the diversity ofblue-green algae in the hypersaline lake as part of the comprehensivestudy of the Salton Sea coordinated by Professor Stuart Hurlbert,director of the Center for Inland Waters at San Diego State University. ScottMiller, the l...

Deficiency of growth hormone and IGF-1 reduces cancer and kidney disease, but creates other problems

... of these deficient rats were given growth hormone while they were between 4 and 14 weeks of age ?rat adolescence. Then hormone treatment was stopped and the animals had lower growth hormone and IGF-1 levels the rest of their lives. That had an effect on cancer: 88 percent of "normal" male rats have tumor...

HIV Infection Still On The Rise

...nst HIV has so far produced only negative results, while microbicides have proved disappointing. Although t...nt consumes £12,500 in healthcare costs each year, while the lifetime costs of care for the current 50,000 infected individuals in the United Kingdom, with a...

An entropy-based gene selection method for cancer classification using microarray data

...ects genes related to the different cancer classes while at the same time reducing the redundancy among the genes. Results The present study identifies a subset of features by maximizing the relevance and minimizing the redundancy of the selected genes. A merit called "uncertainty" is employed to measure...

DNA Recombination and Repair—A New Twist to RecA Function

...iate from DNA when they are at the fiber’s 5' end, while ATP hydrolysis occurs all along its length. Under their experimental conditions, the authors found that a RecA molecule hydrolyzed 20 ATPs per minute—or one ATP every three seconds. If ATP hydrolysis occurred randomly in the fiber, one would expect ...

New studies suggest airborne SARS transmission is possible

...tients in an adjacent bay were infected with SARS, while only 18 percent of patients in distant bays were infected. The Hong Kong researchers, led by Ignatius T.S. Yu, MBBS, MPH, of the Chinese University of Hong Kong, speculate that the increased risk of infection with closer proximity to the index SARS ...

First real-time view of developing neurons reveals surprises, say Stanford researchers

...tures, some of these branches form stable synapses while others recede. This trial-and-error process is what establishes the final interconnected mesh of the brain. Because the group could see the full branching structure of a neuron each time it fired, they could watch the branches grow and recede like a...

New insight into people who 'see' colors in letters and numbers

...when listening to music, or feeling tactile shapes while tasting food. This cross-activation might develop, they theorize, by a failure of the "pruning" of neural connections between the areas in the developing brain. The rare condition called synesthesia--in which people's sensory perceptual circuitry se...

The BIOS Initiative - open source biotechnology is born

... sharing of the core tools of innovation with all, while still allowing patenting of products, where necessary. Not content with inventing new technology and new software communities, CAMBIA is also releasing new functionalities in its highly successful Patent Lens, which includes the world's fastest free...

Tiny scaffolding allows stem cells to become working fat cells

... that could serve either as a temporary substitute while waiting for a donor organ, or even providing a replacement organ." Along with Xihai Kang and Yubing Xie, both postdoctoral fellows in his laboratory, Kniss built a fabric-like carpet of polyethylene terephathalene (PET), or Dacron, fibers that serve...

Scientists identify new model Of NK cell development

...body. Through flow cytometry, they discovered that while NK precursors make up about 1 percent of bone marr...akes the provocative observation that lymph nodes, while full of CD56 bright cells, are significantly lacking in their counterparts, the CD56 dim cells. "Ou...

Study of genomic DNA leads to new advances in cancer diagnostics

...ant cells were sensitive to DNA digestion by Alu I while highly malignant cells were resistant. These results suggest that a cell's DNA, or chromatin, is protected during malignancy. This effect was confirmed using three pairs of cell types (normal melanocytes and melanoma cells, normal breast epithelium a...

Breakthrough method in nanoparticle synthesis paves the way for new pharmaceutical and biomedical applications

...ant acts as the template for mesoporous structure, while the other is used to limit the growth of the particles to nanometer dimensions. This method can be used to create a variety of nanoparticles with enormous surface areas, and very well-defined pore size and structure. One important application of th...

RNA project to create language for scientists worldwide

...searchers focus on the sequences of RNA molecules, while others study their 3-dimensional structures. A maj...more roles than originally believed. For instance, while genomicists had previously determined that humans and chimpanzees share 99 percent of the same prote...

Examination of internal 'wiring' of yeast, worm, and fly reveals conserved circuits

... of human cells to more effectively treat diseases while also generating fewer side-effects. "We're basically now able to open the hood of yeast, worm, and fly cells and look at the protein interactions inside," said Trey Ideker, a bioengineering professor at the University of California, San Diego and on...

South America's vast pantanal wetland may become next everglades, UNU experts warn

...ompromised by the global problem of climate change while local pollution, habitat destruction and narrowing...Roads and electricity lines have been constructed, while large agri-industrial projects have emerged on the Pantanal's periphery ?large-scale cattle ranching...

In the migratory marathon, parasitized monarchs drop out early

...xplanation : infected monarchs quite don't make it while migrating long distances, so they can't propagate the infection once arrived at destination. A little-studied outcome of animal migration is whether these long journeys can limit the spread of parasites by weeding out diseased animals. Monarch butt...

Implanted Devices Detect High-Risk Heart Failure Patients

...rt rate variable would have a very wide footprint, while those with sick hearts would have a narrow footprint that represents the reduced variance in heart rate response," Gilliam explained. "These footprints provide us with an unbiased ?distinct from the patient's perception ?look at how the patient is tr...

VCU Researchers Identify Networks Of Genes Responding To Alcohol In The Brain

...ol caused genes to be turned on more in one strain while decreasing expression of the same gene in the other mouse strain. Such differences are thought to be related to the mechanisms underlying the different behaviors that the B6 and D2 mice show with alcohol. Researchers also determined whether genes wi...

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