Tag: "question" at biology news

New technique provides insights into gene regulation

...arable numbers and types of genes has been a major question since the genetic similarity was discovered. Scientists are trying to understand what turns a gene "off" or "on", or alters its activity when "on" in other words, the process of gene regulation. The answer may lie in the coding segments (exons) o...

Scientist discover the cellular roots of graying hair

...ormal hair follicle cycling," adds Fisher. "So the question is: what in the hair follicle is signaling the stem cells that is absent when aging occurs and the stem cells die off? Now we have a much more refined way of dissecting that signaling pathway in melanoma. Eventually we hope to tap into this death pa...

UGA partners with U of Pennsylvania for bio-defense and infectious disease research project

...e is one database. They'll be able to ask a single question that applies to multiple databases and get a response." The database for Plasmodium (PlasmoDB) is already well advanced; for the other parasites, sequence data is just becoming available. But for all the organisms, scientists continually contribut...

Bound for destruction

... What has long remained a mystery, however, is the question of how Notch receptors that have not been activated by a ligand are protected from digestion by that protease. Now, in a report published in the December 29 issue of Current Biology, Shigeo Hayashi (Group Director, Laboratory for Morphogenetic Signal...

Evidence that human brain evolution was a special event

...of Chicago. "I believe that our study settles this question by showing that it was." Lahn and his colleagues ...tion. Lahn believes that answers to this important question will come not just from the biological sciences but from the social sciences as well. It is perhaps ...

Vollum Institute discovery may unlock human genome

...Genome Project was completed early last year. "The question was how to understand the enormous amount of genomic information that has been generated," Goodman said. "Our approach will help unlock the regulatory control of the genome." The approach could heighten understanding of the pathways behind genetic ab...

Human complexity and diversity spring from a surprisingly few (relatively speaking) genes

... genome size and an organism's complexity raised a question - how do complexity and diversity arise in higher life forms? The unexpected finding, says Stefan Maas, necessitates a clearer understanding of the role played in protein diversity by processes that take place after DNA is transcribed to RNA and afte...

Higher blood pressures among African Americans - genes not likely to be an explanation

...-estimated" write the authors. They add that "the question of inherent susceptibility is probably non-testabl...s" and argue that rather than trying to solve this question we should concentrate on identifying and preventing possible causes of hypertension, which are likel...

Queen's discovery sheds new light on ancient temperatures

...melts when brought to the surface. The fundamental question for scientists is what triggered the enormous ice ages that left the oceans cold enough for the formation of this mineral? One controversial theory known as "The Snowball Earth" hypothesis suggests that around 700 million years ago the earth was alm...

Stowers researcher answers fundamental question of cell death

...se." "Dr. Du's findings answer a fundamental question of apoptosis and have implications for a wide variety diseases," says Robb Krumlauf, Ph.D., Scientific Director of the Stowers Institute. "These findings are an example of the broad impact of basic research conducted at the Stowers Institute." Dr. Du...

Development of portable infectious disease detector

...t for AIDS is very expensive and there is always a question about when to start and stop anti-retroviral therapy," says Pria's Chief Technology Officer Jason Pyle. "We are developing a device that we hope will allow medical professionals and HIV patients to manage their disease in a way that is similar to how...

Sardines may prevent toxic gas eruptions off the California and African coasts

...rge quantities of phytoplankton. "The region in question formerly hosted a large population of sardines that have been overfished," says Bakun, a member of the Pew Institute and professor of marine biology and fisheries at the University of Miami Rosenstiel School of Marine and Atmospheric Science. "It is...

Why does species diversity vary so much?

...e it is warm and wet (the humid tropics). But the question "why" has puzzled biologists for over a century. In the December issue of Ecology Letters, Currie and colleagues examine three hypotheses about the origin of climatic gradients of diversity. The "Species-energy" hypothesis proposes that high tropi...

Research turning up the heat on fowl bacteria

...National Institutes of Health grant to answer this question and develop a vaccine. "To understand how to treat a bacterium, you have to understand how it causes disease." He and Dr. Burns, co-principal investigator on the latest grant, are learning that the mindless microorganism is an incredibly skilled surv...

NYU researchers simulate molecular biological clock

...teractions are inherently random, which raises the question how a clock with such imprecise components can keep time so precisely. One way to combat molecular noise is to have large numbers of molecular interactions, but this is limited by the small numbers of molecules of some molecular species within the c...

COX-2 levels are elevated in smokers

... and activating the EGFR. These findings led us to question whether tobacco smoke initiated the process of increasing COX-2 production by first stimulating production of proteins that controlled activity of the EGF receptor," Dannenberg said. Cells exposed to tobacco smoke increased production of two EGFR lig...

Genetic testing for Parkinson's disease on the horizon

...fferent populations is intriguing. This raises the question of whether the mutation originated independently in the different cases and families, or if it was transmitted from a single common ancestor. Future genetic studies will address this issue; however, if it comes from a common ancestor, this mutation m...

Study in Royal Society journal on managing GM crops for environmental benefit

...d by Dr AR Solow and Professor WK Smith A central question in biology concerns the number of species in a taxonomic or other group. A common approach to estimating the number of species in a taxonomic or other group is to extrapolate the historical rate at which species have been discovered. To date, this h...

Scientists find common roots for thousands of plant compounds

...sil plants and in mint," she said. "This opens the question of how widespread is this phenomenon?" The finding also raises intriguing questions in plant evolution. "We still don't understand why plants have duplicate pathways in different parts of the cell," Rhodes said. "And if one of these pathways is not o...

B-15A iceberg's close encounter monitored by Envisat

...s and floating sea ice. CryoSat should answer the question of whether the kind of icesheet calving that gave rise to B-15 and its descendants are becoming more common, as well as improving our understanding of the relationship between the Earth's ice cover and the global climate....

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