Tag: "external" at biology news
UNMC, Boys Town National Research Hospital Researchers Locate Gene That Causes Combined Deafness And Blindness
...ein that spans the cell membrane,communicating the external
environment to the inside of the cell so it can adaptto changing needs. The testing of these hypotheses through experimentation will allow theresearch team to learn how mutations in the gene cause deafness and blindness."We now have the tools...
Photosynthetic Harvest Inc. Harnesses The Power Of Nature's Chemical Factories
By "Milking" Green Plants For Valuable Natural Products
...chanisms available to protect themselves from both external
and internalstresses, plants have only one major defense mechanism: chemistry. Over theirevolutionary history, plants have developed extremely effective "biologicalwarfare" capabilities for protection against stresses. Plants are mostvulnerable in ...
DFG To Set Up 14 New Collaborative Research Centres
...ave specific receptors enabling them to respond to external
stimuli such as hormones,growth factors or other m...x macromolecular and hybrid systems in internaland external
fields " to be established at Bayreuth University plans to organise andcharacterise such nano-struct...
Persistent Organic Pollutants, The Danger Is Not Over
...e to the central nervous system. There are no external
changes, but for the rest of their life they will endure reduced learning capacity and hyperactive behaviour, showing irreparable brain damage. Other toxic pollutants, such as PCBs and brominated flame retardants, can also cause simila...
Sturgeon, Trout And Telemetry--USGS Research Mixes Science And Technology At American Fisheries Society Annual Meeting
... 27, session 11 Researchers used a combination of external
tags, radio telemetry, and size data to determine that there are multiple and distinct rainbow trout populations in different locales in the Alagnak watershed, and that they exhibit distinct seasonal movement patterns based principally on temperature...
International Study Finds Mothers' Lifetime Lead Exposures May Put Breast-Fed Newborns At Risk
...iously exposed to high concentrations of lead from external
sources such asleaded paint, pottery, or, in many other countries, industrial sources andleaded gasoline." While previous research had demonstrated that lead is stored in bones,scientists could not quantify its release into the blood and other bod...
Simple Chemical Switch Steers Migrating Neurons
...by other factors in the growth cone'sever-changing external
environment. This, says Tessier-Lavigne, suggeststhat "the response of a growth cone to a particular guidance cue maydepend critically on other signals received by the neuron. Thesusceptibility to conversion between attraction and repulsion may enabl...
Birds Of A Feather: The Physics Of Flocks
...ten move harmoniously without any sort ofleader or external
cue, especially when they are traveling over short...ts infancy. The theory does notyet factor in many external
cues that birds may use, such as seasonaltemperature and even the Earth's magnetic field (some bird...
New Consortium Of Nutrition And Medical Experts Takes On The Lack Of Nutrition Education In Medical Training
...d in the participating societies, the Consortium's external
advisory committee is made up of representatives from three organizations representing physicians most often faced with nutrition questions: the American Board of Internal Medicine, American Gastroenterological Association, and the American Board of ...
Henney To Address Attendees At FDA Science Forum
...otechnology regulation with FDA scientists and the external
scientific community. AAPS is co-sponsoring the 1998 FDA Science Forum, titled "Biotechnology: Advances, Applications, and Regulatory Challenges," with FDA and the FDA Chapter of Sigma Xi at the Washington Convention Center in Washington, D.C., Dec. ...
Stress Hormone Levels Predict Length Of Gestation In Human Pregnancy
...ody's hormonal and immune responses to internaland external
challenges, including stress. During pregnancy, CRH is alsosynthesized in large amounts by the placenta and is released into maternal andfetal circulatory systems. In previous studies, elevated levels of maternal CRH have been associated with the...
Monkeys Have Numerical Abilities, Two Columbia Psychologists Report
...t animals solved complexproblems without help from external
cues." Added Ms. Brannon, "Though monkeys do not recognize the word 'two' orthe symbol '2,' they share with humans the capacity to master simple arithmetic,on at least the level of a two-year-old child. We don't have direct evidenceyet, but...
Cell Suicide Prevented By Survival Signals
...treating cancer cellsthat have freed themselves of external
survival signals. "The role ofRas in cancer has been recognized for a long time," says Steller,"but most efforts have historically focused on its contribution indriving cancer cells to proliferate. Only recently has it become clear thatRas also promo...
Penn Researchers Awarded $10 Million Grant To Study Link Between Genes And
...apy or as oralcontraceptives to prevent pregnancy, external
hormones canincrease the risk of breast and uterine cancers. To advance theinvestigation of hormone-induced female cancers, researchers atthe University of Pennsylvania School of Medicine have beenawarded a five-year Program Project Grant by the Nat...
Large Gene Study Questions Cambrian Explosion
...rd externalskeletons in animals that had only soft external
skeletons before the Cambrianperiod. "Hard body parts like external
skeletons are most likely to becomefossils," Hedges explains. Species not likely to fossilize, like...
Experimental Antibiotic Promptly Kills Drug-Resistant Bacteria In Studies
... and Technology(LekBioTech) in Moscow. The model's external
compartment features a series of tubing-linked chambers that house bacteria. This peripheral structurecommunicates with a central compartment into which antibiotic is infused. The design allows researchers to periodically vary the concentration ofant...
Radioactive Beads Latest Weapon In Fighting Cancer In Dogs, Cats
...or conventional radiation therapy where you use an external
beam unit, theanimal has to lie still for the radiation therapy; this requires dailyanesthesia anywhere from 10 to 15, or 20 times -- depending on what type of tumorit is," Chun said. "And the costs really add up when you have to anesthetize theanima...
Computer Simulation Reveals Nano-Switch That Activates Cell-Binding Function Of Key Protein In The Body
...led pictures of amolecule's structural response to external
forces. Vogel working with Schulten, his graduate student Hui Lu andpost-doctoral fellow Barry Isralewitz, simulated the forced unfolding of themuscle protein titin. Results mirrored the forces required to pull apart titinin laboratory experi...
New Insights Into The Transport Machinery Of The Cell: A Single Protein
Substitutes The Regulatory Machinery Specifying Endosome Fusion In Vitro
...cs. Cells constantly internalise material from the external
of the celland distribute it to the other cellular compartments via specific organellescalled endosomes. To bridge the distance between the cell surface and theendosomes, small membrane engulfed vesicles bud from the cell surface like soapbubbles and...
Nerve Cells On The Go
...uron guidance researchers traditionallystudy which external
cues the growth cone encounters and which receptors it usesto recognize them. But this research has not yet completed the link to actin. Van Vactor's work bridges that gap by describing the first continuousline of communication linking a rece...
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