Tag: "questions" at biology news

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

...s 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 some 10 to 12 years later? "Puberty...

Neuronal 'traffic jam' marks early Alzheimer's disease

...gy similar to that seen in Alzheimer's. One of the questions they will also ask is whether amyloid plaques poison the transport machinery. If the experiments do, indeed, confirm the predictions of the transport hypothesis, then neuronal cultures could prove valuable in testing diagnostic and therapeutic approa...

Solution to Pollution: New Bacteria Eats Toxic Waste

...etic material for the five isolates. They answered questions about the size of their chromosome and whether plasmids were present in the mycobacterium. “Putting together genomes tells us a lot about the history of the world and may even help us with its future,?said Joanne Hughes, a Utah State Biology professo...

Scientists decipher genome of fungus that can cause life-threatening infections

...factor in the pace ofdiscovery and in the scope of questions that can be asked about thebasic biology of Cryptococcus as well as the disease process," saysLodge, who is SLU's Associate Dean for Research and who helpedcoordinate the C. neoformans genome project.Heitman says, "The genomic sequence and transcript...

Weill Cornell Research Reveals Secrets Of Trafficking Within Cells

...endocytotic process," he said. ÒWe're going to ask questions such as, 'OK, if I tweak this molecule, how does that change clathrin's role in all of this?'Ó "It's really quite exciting," Dr. Ryan said. "This new methodology, coupled with our better understanding of clathrin, should really help crack this field...

Scientists identify new model Of NK cell development

...ells," he adds. "This study raises almost as many questions as it answers," says Caligiuri, "Finding these nursery sites of NK cells is just the first step. We feel this is the first solid evidence supporting a new model of NK cell development, but we also know that more work needs to be done to fill in some ...

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

...ed the potential for addressing much more specific questions about the roles of various protein components in muscle function using mutant or genetically-engineered flies. Currently, Maughan is collaborating with Jim Vigoreaux, Ph.D., associate professor of biology at UVM, and Doug Swank of Rensselaer Polytech...

World's largest rainforest drying experiment completes first phase

...owth for years to come? These are just some of the questions that will be explored during the final two years of this experiment. Collaborating organizations in this effort include IPAM (Instituto de Pesquisa Ambiental da Amazonia), EMBRAPA (Empresa Brasileira de Pesquisa Agropecuaria), University of Georgia,...

Scientists find fossil proof of Egypt's ancient climate

...ssic earth science methods and concepts to address questions of archaeological interest. "In this particular study, we're interested in building a history of climate change through time to understand how people would have responded to dramatic shifts in climate," said Smith. "This is a major theme of our work...

Potential treatments for neurofibromatosis

...d 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 formation in these malignancies." Neurofibrom...

Variation in women's X chromosomes may explain differences among individuals, between sexes

...gnificance of these sex-specific differences, many questions remain, Willard said. For example, further study is required to determine if the pattern of X inactivation differs across tissues or over time and whether there are characteristic patterns of inactivation in maternally versus paternally inherited X c...

Antiretroviral therapy may prevent excess risk of some cancers in people with HIV

... diseases has grown since it began. They note that questions remain about the types and severity of cancers that will appear in coming years among patients on HAART, who have less severe but prolonged immunosuppression. "Controlling the epidemic and ameliorating the suffering of persons living with HIV/AIDS ar...

Flocking together: Study shows how animal groups find their way

...n the Feb. 3 issue of Nature, helps settle age-old questions about how animals coordinate their actions. Previously, scientists had looked for subtle signals or other explicit systems that animals may use in disseminating information through groups. The new study showed that such complexity is not necessary: L...

Polymers with copper show promise for implanted sensors

...-releasing polymers they developed earlier. Other questions to explore are how much of the raw materials for generating nitric oxide are present in blood, and whether the amount varies from one person to another. "The device might work with me, but if you don't have enough of the reactive species in your bloo...

Harmful chemicals may reprogram gene response to estrogen

...te." The finding should alert doctors to ask more questions about a patient's early-life exposures to chemicals and other harmful agents in order to better predict that person's cancer risk. "Most people with a family history for a particular disease are concerned about their recent exposures to harmful agen...

Scientists journey to southern Africa to unravel the secret world of elephant communication

...rophysiology and ecology," she says. "We're asking questions that no one has really dealt with before." SIDEBAR: Anatomy of the trunk and feet offers new clues to elephant seismic sensitivity In addition to her fieldwork, Caitlin O'Connell-Rodwell also is conducting laboratory studies on elephant physiology ...

New World founders small in number

...rchers will be able to explore this and many other questions to fill in the details of the first American immigration. Citation: Hey J (2005) On the number of New World founders: A population genetic portrait of the peopling of the Americas. PLoS Biol 3(6): e193. ...

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

...he 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? Nottebohm's laborato...

Product improves peptide identification for proteomics research

...archers to solve their most challenging scientific questions more easily and with greater confidence," said Taia Ergueta, general manager of Agilent's Proteomics and LC/MS business. "The LC/MSD Trap XCT Ultra improves performance for a wide range of demanding applications in metabolite characterization, natura...

Researchers make surprise discovery that some neurons can transmit three signals at once

...ere can be practical clinical applications several questions need to be answered, including how GABA, glycine and glutamate synapses cooperate to activate NMDA receptors. In the traditional sense, when inhibitory synapses are mature, they would never release glutamate, nor would they be able to depolarize a ce...

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