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Tag: "answer" at biology news

A gene's first 'kiss' sets off that affair known as puberty

...e change in boys. As such, this research begins to answer one of the most vexing questions about human development: What causes puberty to begin? How is it that the full repertoire of reproductive hormones can exist at birth, go into hiding at about four to six months of age, then reemerge in full force som...

Growth in the sea comes down to a struggle for iron

...short supply. Why this happens is unclear, but the answer could be that iron sets off a kind of chemical war...r life. Speculation that iron provided part of the answer goes back to the 1930s. However, it wasn't until 1989 in the journal Nature that oceanographer John ...

Anti-bacterial additive widespread in U.S. waterways

...mplex question consumers,knowingly or unknowingly, answer to everyday in the checkout line ofthe grocery store," said Dr. Halden....

Jefferson Virologists Coax HIV Out of Hiding

...other reservoirs as well.?Ultimately, he says, the answer to the latency problem may entail usinga combination of drugs. “We may need more than one drug to stimulatevirus from latency, similar to using HAART to stop replication,?hesays, referring to this approach . “We may have to combine IL-2 withIL-7 and ...

New studies suggest airborne SARS transmission is possible

...oronavirus transmission to health care workers. To answer this question, they collected patient information and environmental samples from the SARS units of four Toronto hospitals. SARS coronavirus was detected in the air in one of the four rooms tested. The researchers also detected virus in four of 85 su...

X-Ray Beams And Fruit Fly 'Flight Simulator' Aid Scientists' View Of Muscle Power

...Technology (IIT) and Caltech performed research to answer that and other questions. The research team, including David Maughan, Ph.D., research professor of molecular physiology and biophysics at the UVM College of Medicine, published their results in a report in the Jan. 20 issue of the British journal Na...

Measuring the impact of post-genomics on Mediterranean populations

...eet and discuss project ideas they could submit in answer to the December 2004 call for proposals under the INCO-MPC (International Co-operation-Mediterranean Partner Countries) scheme. Under the Sixth Framework Programme’s (FP6) ‘Specific measures in support of international co-operation? project proposal...

Potential treatments for neurofibromatosis

...ead to the development of tumors and are poised to answer some of the most perplexing questions that underlie neurofibromatosis," said Dr. Clapp. "Our work may well be applicable to other types of tumors such as breast and ovarian cancers, because inflammatory cells play an important role in tumor formatio...

Controlling protein diversity

... department of molecular and cellular biology. The answer is a process called alternative splicing in which certain information from a gene is left out or included, changing the format of the resulting protein. In other words, if the information in a gene is like the elements of a computer code, leaving ou...

New Drugs For Bad Bugs: UF Approach Could Bolster Antibiotic Arsenal

... it to other classes of drugs. It may be useful to answer many, many different questions.?/p> The PK/PD approach aims to ensure that doses tested in clinical trials are adequate and likely to yield good results, said Dr. William Craig, a professor of medicine at the University of Wisconsin, adding that ...

Birds brains reveal source of songs

...arkinson's disease. "The question we're trying to answer is how a young bird learns its song," says Professor Michale Fee of MIT's McGovern Institute about his recent study, which was published online in advance of the May issue of the free access journal, Public Library of Science Biology. "We've known th...

Some Brain Cells 'Change Channels' To Fine-tune The Message

... why the cells change their channels. Part of the answer is likely to be self-preservation: Too much calcium inside nerve cells can kill them. But Huganir points out that calcium does a lot of things inside cells, suggesting that the channel swap might be accomplishing more than just keeping the cell alive...

Different microarray systems more alike than previously thought

...croarray experiments, but there hasn't been a good answer to that question," said Rafael Irizarry, Ph.D., associate professor of biostatistics at the Johns Hopkins Bloomberg School of Public Health. "Now we see the possibility that it may not make much difference as long as the systems are used properly and...

One gene links newborn neurons with those that die in diseases such as Alzheimer's

... as a surprise to the researchers. They set out to answer fundamental questions about the small number of brain neurons that can be replaced when they die: Are these cells similar to other neurons that are not replaced in adult life? Or, in terms of which genes are "turned on," are they marked as transient?...

Brain May Be Less Plastic Than Hoped

... months following the lesion??said Smirnakis. “The answer is, in that time interval the primary visual cortex did not achieve anything like normal responsivity.?/p> To arrive at this conclusion, Smirnakis and his group first photocoagulated the retinas of four monkeys with a laser, creating small blind ...

Conserved amino acids play both structural and mechanistic roles in sandwich-like protein

...ructure? In our paper, we unravel an unprecedented answer to this question." Wittung-Stafshede and graduate student Corey Wilson analyzed the purpose of six of the eight amino acids by exchanging a nonessential amino acid for each of them and monitoring the effect on the protein structure. (For technical r...

Stem cell research - new cell lines

...an embryonic stem cell research offers a permanent answer to the problem. It gives the hope that we can produce a pure population of those cells in large numbers and transplant them into the patient." The researchers are currently in the discovery phase, where they are trying to characterise the three clon...

Unchecked DNA replication drives earliest steps toward cancer

...n a new study, researchers at The Wistar Institute answer this vital question and suggest why mutations in a certain few genes, such as the p53 tumor suppressor gene, are found in so many different cancers. Mutations in p53 are found in the majority of human cancers, for example. The Wistar team's primary o...

Molecular thermometers on skin cells detect heat and camphor

...tion in the living mammal?" says Patapoutian. "The answer seems to be 'yes.'" This is significant because it suggests that TRPV3 is a potential drug target. TRPV3 is one of many receptors that participate in signaling pain--an indication for which there is a great need for new therapeutics. Indeed, severa...

Some Brain Cells Change Channels

... why the cells change their channels. Part of the answer is likely to be self-preservation: Too much calcium inside nerve cells can kill them. But Huganir points out that calcium does a lot of things inside cells, suggesting that the channel swap might be accomplishing more than just keeping the cell alive...

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