Tag: "limit" at biology news

Platelet refrigeration method may ease shortages for transfusions, researchers report in Science

...must currently be stored at room temperature for a limit of five days. After this period, the platelets must be thrown away, because they no longer function properly and their risk of bacterial contamination increases sharply. Shortages in donated platelet supplies can have serious consequences, because pa...

Study at TSRI links dozens of proteins to several rare muscle and nerve degeneration diseases

...t they were able to apply computational methods to limit the final list of new human nuclear membrane proteins to 62. The scientists then took eight of these proteins at random and demonstrated that they all indeed targeted to the nuclear membrane. The new nuclear membrane proteins identified in this...

Washington University in St. Louis, Monsanto Co., awarded crop protection patent

... virus infection by using chemical insecticides to limit spread of viruses. The "coat-protein mediated resistance" technology, like other disease resistance genes, can substantially reduce farmers' reliance on chemical insecticides. Therefore, this technology has helped solve an otherwise unsolvable prob...

Microbe from depths takes life to hottest known limit

...ey and Kazem Kashefi write, "The upper temperature limit for life is a key parameter for delimiting when an...ronments." Previously, the upper known temperature limit for life had been 113 C (235 F), a record held by another hyperthermophilic--or extreme-heat-liking-...

Envisat focuses on carbon-rich peat swamp forest fires

...le management of land and forest resources to help limit future fire outbreaks across the whole region. Siegert believes that space resources can help achieve this goal: "Immediate action to control fire occurrence has to be taken. ESA's Envisat has shown it could play an important role in this task and s...

Enhancing the nutritional value of soybeans

...ere the high cost of synthetic second-tier AAs may limit their use. Anthranilate synthase (AS) catalyzes one of the key steps in the biosynthetic pathway for tryptophan production in plants. To increase tryptophan content in soybean seeds, a variant of the maize AS gene that is insensitive to tryptophan i...

Straight talk: Adult and embryonic stem cells and the future of research

...it," says Civin. Criticizing policies that would limit study to only stem cells from "adult" tissue, or from embryonic tissue, Civin says the key to making progress scientifically, which eventually improves medicine, is to approach a question from a number of angles. Limiting the approaches slows discove...

Cold-climate creatures may be the ultimate survivors of global warming, study finds

... were able to change their upper thermal tolerance limit much more readily than those from hotter climates....F (25 C) tank water had an upper thermal tolerance limit of about106.2 F (41.2 C) only a fraction of a degree higher than those kept at 59 F (15 C), "Thus,...

Strategy to treat AIDS patients in Africa with less drug, reduced toxicity set for clinical test

...the high cost of providing drugs for studies would limit the agency's overall capacity for supporting international AIDS research. Also, the agency and researchers alike agree that an important ethical consideration is to address this issue of providing continuing access after a study to the live-saving dr...

World first for Swedish researchers mice born from transplanted wombs

...s demonstrates is that in mice, at least, the time limit for removing a uterus and transplanting it is between 24 and 48 hours," said Professor Brnnstrm. Another major problem in transplantation is organ rejection. This differs between organs depending on the extent of blood vessels, the specific type of c...

New center for preparation and distribution of adult stem cells

...ts and the expense of producing high-quality cells limit the capacity of investigators to proceed with their research," said Dr. Judith Vaitukaitis, Director of NCRR. "This center, with the emphasis on quality control and standardized methods, will move this promising research forward." Adult stem cells h...

Scientists identify genetic link between cancer and aging

...ent with the hypothesis that genetic programs that limit organismal aging may, at the cellular level, promote tumor development, thus constituting a double sword. On the positive side, we hope that our study will provide a new therapeutic target able to trigger tumor cells into senescence." Dr. Grandor...

UGA scientists discover gene that maintains genome integrity by limiting DNA replication

...ct it from unrestrained replication. A failure to limit DNA replication leads to the indiscriminate expansion of genomic DNA, which has catastrophic consequences for the survival of the organism. The identification of CUL-4 as a major regulator of DNA replication levels will likely lead to investigations ...

Media seminar on cardiovascular medicine

...ludes promising efforts to grow new blood vessels, limit stroke or heart attack damage and develop genetic techniques to detect and treat the underlying causes of high blood pressure. In terms of total funding and number of researchers, the CVC is one of the top cardiovascular research groups in the count...

Insulin study sheds light on physics of crystal growth

... While Vekilov's research has focused on trying to limit step bunching in protein crystals, he says understanding the physics of how step bunching occurs - or doesn't occur in the case of insulin - can help scientists by increasing their knowledge of crystal systems and improving crystal-growing methods. F...

Plants and people share a molecular signaling system, researchers discover

...own as stomates, to change their shape in order to limit the amount of water lost by the plants. The researchers found that the enzymes product, S1P, is involved in both inhibiting the opening of the plant's pores and promoting their closure. In addition, Assmann and her team discovered that, in plants as...

Fish is not always 'brain food'

...will decide next week whether the current exposure limit should be decreased. The researchers also used a number of tests to assess mental functions such as learning, attention, memory, accuracy, manual speed and dexterity. Those individuals with higher levels of mercury in their hair fared worse on the t...

New drug enfuvirtide shows promise against drug resistant HIV infection

...injection sites, but most of those did not have to limit their activities or take pain medications for discomfort. Doctors also saw a few more pneumonias in the novel treatment group. "In our study, enfuvirtide resulted in significant improvement in virologic and immunologic responses as compared with indi...

Red tape squeezes access to mental health care

...den" of juggling their policies and procedures may limit patient access to high-quality mental health services, according to a national survey of more than 7,000 primary care physicians. "The red tape and administrative complexity of dealing with multiple health care plans is an impediment to physicians t...

Lithium shows promise against Alzheimers in mouse model

...r, lithium's propensity to cause side-effects may limit its use in older people, who are more susceptible to Alzheimer's disease," cautioned Peter Klein, M.D., University of Pennsylvania School of Medicine, who led the research team, which was funded by the National Institute of Mental Health (NIMH) and t...

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