Tag: "reveal" at biology news

Viral Harpoon Structure Suggests Measles, HIV And Ebola Viruses Related

...s infection — whenthe virus unfolds itself to reveal a spikelike protein that is launched into thegel-like outer membrane of the target cell. "It's much like a harpoon goinginto a target," said Lamb. He emphasized, however, that more research is needed to answer two importantquestions: What triggers ...

Breakthrough On Microbial Disease Published In Science

... Mahan has discovered a way to get the bacteria to reveal itselffully to the immune system, to show its hand. "Bacteria are great pokerplayers," he said. "But no matter how good a poker player you are, if you lay your cardsdown, you're dead." Mahan's new mutated strain of Salmonella, with the ma...

Physicists Find Simple Solution To Great-And-Small Mystery

...e of the journal Nature, a team of physicists will reveal ageneral theorem capable of explaining the phenomenon, known as allometricquarter-power scaling. "The pulse rate of a mouse weighing 30 grams may be 600 beats per minute,whereas the heart of a 5 ton elephant beats only about 30 times per minute,which...

Fossilized Emu Eggshells Give Clues To 65,000 Years Of Vegetation And Climate Changes In Australia

...formation is used by the scientists as a marker to reveal aspects of the past climate and vegetation of Australia. Scientists Beverly J. Johnson and Marilyn L. Fogel of the Geophysical Laboratory of the Carnegie Institution of Washington, G. H. Miller of the University of Colorado and others* report their ...

The Sagan criteria for life revisited

...e to emphasize composition differences - blue hues reveal titanium rich areas while orange and purple colors...cted remotely without extracting organic matter to reveal oil shales and source rock that came from the decay of green plants. Does the presence of porphyr...

Symposium Probes Impact Of Toxins On Development

...nvironmental causes and on new genetic models that reveal the mechanics ofdevelopment. Prominent symposium speakers include 1972 Nobel Prize-winner GeraldEdelman of Scripps Research Institute. He will speak at 7:15 p.m. Thursday, June3, about topobiology, or an exploration of why genes are expressed in some...

Reproductive Signals Affect Lifespan In Roundworm C. Elegans, Offering Possible Insight Into Human Aging Process

...bsence. The investigators' solution was to try to reveal the somaticgonad's unique role by again manipulating DAF-16 and DAF-2 genes, which theydid. The authors also made another interesting finding: Their observations suggestedthat there may be more than one site on the DAF-2 gene to which signals thatreg...

Undiscovered Biological Diversity: A Symposium On Bioprospecting

... diversity, Colwellsaid, because indigenous people reveal what resources are useful."Bioprospecting must involve native cultures," he said. "They have anunderstanding of how to use natural products." Biodiversity exists in both the macro world -- the one we can see -- andthe microbial world. Speaker...

Nature publishes secret of abalone shell strength

...letstogether. The researchers were able to reveal the properties of the adhesive insingle-molecule pulling experiments using the Atomic Force Microscope (AFM) tomeasure the elasticity and strength of individual protein molecules. This workwas done under the direction of Paul K. Hansma, professor of ...

Duke researchers discover protein that can alert immune system to fight cancer

...hitta. So far, the scientists' experiments reveal that calreticulin and arelated protein called GRP94 both can alert the immune system by informing itabout where in the body an insult has occurred. The proteins act as informantsby carrying small pieces of cellular proteins called peptides as a type ...

The lie of the tiger

...nga 'pure stimulus', like an isolated atom, we can reveal the secrets of the humanbrain." According to Lu, the methodology and results from this study will provide abasis for a broad class of neurophysiological investigations on high-order brainfunctions. The computational algorithms will be incorporated i...

University of Pittsburgh researchers demonstrate metabolic link between large waists and colorectal cancer

...ncluding glucose, insulin and waist circumference, reveal a risk ofcolorectal cancer that equals or exceeds other known risk factors, such ashaving a first-degree relative with this disease or consuming a high-fat orlow-fiber diet." The current report is based on a study of 5,849 people age 65 andol...

Cellular espionage at play in post-menopausal osteoporosis

... (IL-1) and Interleukin 8 (IL-8). Their findings reveal a "cellular espionage" scenario involving signalingreceptor proteins and decoy receptor proteins. Osdoby, Sunyer and colleaguesfound that, in the presence of estrogen, decoy receptor proteins increase inbone cells, preventing cytokines from initiati...

Heavy metal research is music to biologists' ears

...of guilt by association." In a continuing quest to reveal the secrets of how copper traffics throughout acell, recently Dr. O'Halloran teamed up with a Northwestern colleague, Dr. AmyRosenzweig, to unravel the structure, or three-dimensional shape, of the copperchaperone protein. Dr. Rosenzweig is well-ver...

Heatstroke killed four football players during 1998, expert urges precautions

... -- who want to playfootball. Such exams sometimes reveal hidden conditions that make heavy exertionhazardous. Parents should make sure their children are insured againstcatastrophic injury and that medical assistance is available during practice andgames. Players should salt their food, but should ...

Single switch triggers two immune system genes

...f pieces of the bacterialartificial chromosomes to reveal where the control elements might be," explainedNus...Nussenzweig emphasizes that there are no data that reveal which isthe correct mechanism, the theory of simultaneous activation might betterexplain why evoluti...

Researchers pave the way to protein therapy in humans

...alactosidase was chosen because its activity could reveal whetheran enzyme could continue to function after it had been transported into cells bythe PTD. Cells take up proteins better if they are at least partially unfoled,as was true for the enzyme. Dowdy's team tested whether beta-galactosidase t...

Advanced light source reveals secrets of ribosome structure

...eribosome complex. The new crystallographic images reveal more about ribosomalstructure than any previous observations had suggested, an achievement featuredon the cover of this week's issue of Science magazine (Sept. 24). Harry Noller, a professor of molecular biology at UC Santa Cruz, led theresea...

Good seed, bad seed: Evolution divides the plant world

...ween Arabidopsis and rice. These results not only reveal anevolutionary divide between dicots and monocots but also caution scientistshoping to exploit Arabidopsis sequence for understanding cereal crops like riceand wheat. When it comes to gene sequence, there may be no substitute for thereal thing....

Cancer gene is normally a 'carpenter' in the cell

...ts, this discovery of c-Abl's normal functioncould reveal new targets for cancer drugs, and it also hints at...ent and function. "In general, our findings reveal that c-Abl acts downstream of growthfactor receptors, telling us how oncogenic forms of c-Abl take o...

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