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Tag: "stressed" at biology news

Special Imaging Study Shows Failing Hearts Are 'Energy Starved'

...lar-level measurements of the CK supply in normal, stressed and failing human hearts. Other team members include Robert G. Weiss, M.D., and Gary Gerstenblith, M.D., both in the Cardiology Division of the Hopkins Department of Medicine. For the study, the researchers used an MRI device that combines conventi...

UCLA launches $20 million stem cell institute to investigate HIV, cancer and neurological disorders

...Gleevec, is director of the new institute. He also stressed the interdisciplinary approach necessary to face the challenges related to stem cell research. "Embryonic stem cells have the power to develop into every type of human tissue," said Witte, who also is a professor of microbiology, immunology and molec...

Two are better than one

...collapse inward like overloaded laundry lines. The stressed receptors become engulfed by the cell, and thus cease signaling. In response, the cell halts growth and, when chemotherapy is used in combination with the immunotherapy, it dies. According to Sela, the study sheds light on the synergy at work in the...

A little stress gives beneficial oomph! to immune system

...ed tubes for two-and-a-half hours. These mice ?the stressed group ?could not turn around in the tube, but they...sed group ?remained in their home cages. Once the stressed mice were removed from the tubes, the researchers implanted tiny sponges underneath the skin on the ...

Radio-tracking associated with 'dramatic shift' in water vole sex ratio

...lations." Skewed sex ratios have been reported in stressed and malnourished females of various species, including water voles. The ecologists suggest this could be explained in terms of the local resource competition hypothesis, which predicts that mothers with access to poor resources will produce offspring...

Disabling gene defuses rheumatoid arthritis in mice

...ruct process known as apoptosis. Damaged or highly stressed cells can pull their own plug in this or a similar manner to prevent themselves from becoming cancerous. "It seems that evolution has somehow provided protective mechanisms for innate immune cells when they go into the hazardous inflammatory environ...

New book explains antibiotic resistance for a broad audience

... on antibiotics and antibiotic resistance that has stressed the scientific aspects of the topic has had scientists with advanced degrees as its audience. We wanted to reach a wider audience, but we didn't want to exclude scientists, especially those who work in areas in which information about antibiotics mig...

Human embryonic stem cells have the potential to develop into eggs and sperm in the laboratory

...se embryonic stem cells." However, Mr Aflatoonian stressed that there was still a lot of work to be done before the promise of these early results could be translated into reality. "Embryoid bodies can differentiate into all sorts of tissue types, so we need to choose the cells that are going to develop into...

Squeezing out dune plants

...nd high sea level rise, plant communities were too stressed to grow in many areas, leading to smaller dunes and an eventual breakdown of dune formation. In the higher water scenarios, the plant populations no longer provided windblocks, elevated dune structures, or added to the sand and soil fertility. On G...

Progress on HIV/AIDS significant but insufficient

...ng human rights with an emphasis on gender, it was stressed that human rights violations and inequality between men and women continued to increase the transmission of HIV/AIDS and undermine access to prevention and treatment. The growing feminization of the epidemic had made it ever more necessary to establi...

Stressed cells spark DNA repair missteps and speed evolution

...nding that the mutation rate increased in bacteria stressed by starvation, sometimes resulting in a rare chang...his only occurs at a special time and place in the stressed cells. It all begins with the way that the cell repairs breaks in the double strands of DNA that a...

Oldest dated evidence of cattle in southern Africa found

...eventual spread into southern Africa. Experts have stressed that this delay was largely due to the presence of tripanosomiasis, carried by tsetse flies, as well as other diseases that kill livestock in much of the intervening area. The Toteng sites are situated near the southern edge of the Tsetse fly zone an...

Sahara's edge studied from ground, air and space to improve water management

...tainable Development (WSSD) in Johannesburg, which stressed the potential of space-based systems to help achieve sustainable economic, social and environmental development. ...

Research: Snails were overlooked contributors to marsh destruction

...tensively that the snails moved from finishing off stressed patches to decimating large pockets of otherwise healthy marsh in concentrated waves. The result: the loss of an estimated 250,000 acres of marsh stretching over 900 miles on the Gulf and southeastern coasts between 1999 and 2003. So says a paper se...

World faces challenge as life expectancies lengthen, scientist says

...lim," he said. In the final analysis, Tuljapurkar stressed the need for scientists and policymakers alike to confront the full environmental and sociological implications of anti-aging technologies, with an awareness of the potential costs and challenges in addition to the benefits. "What we've tended to do...

Genetically engineered mosquitoes show resistance to dengue fever virus

...gies using the genetically modified mosquitoes. He stressed that no genetically altered mosquitoes will be released at any time during these studies. ...

Plants used to detect gas leaks, from outer space!

...ugh oxygen and so aerial parts of the plant appear stressed in satellite images detecting reflected light. This remote-sensing technology can be used to detect any type of stress that causes asphyxiation of the plant roots. Steven and his colleagues are already considering other uses for the detection syst...

Alaska seal pup diet may hold key to decline of population

... said. "We don't want to put them in nutritionally stressed situation that would harm them," Polasek said. "We...nsulation and as a source of energy. Nutritionally stressed adolescent females may take longer to reach sexual maturation and mature females that are nutritiona...

NASA study solves ocean plant mystery

...Ore. Scientists determined when phytoplankton is stressed from lack of iron; it appears greener, or healthier than they really are. Normally, greener plants are growing faster than less green plants. When iron is lacking, enhanced greenness does not mean phytoplankton are growing better. They are actually u...

Iron critical to ocean productivity, carbon uptake

...e published this week in the journal Nature. When stressed by a lack of iron, phytoplankton create additional pigments that fluoresce, or light up, unlike normal pigments, according to lead author Michael J. Behrenfeld, a research scientist in Oregon State University's Department of Botany and Plant Patholog...

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