Tag: "when" at biology news
Mysterious Wildlife Disease
...ke the plastic coating around electrical wire, and when
the coating is damaged it can short- circuit the nervous system." In the winters of 1994 and 1996, this disease killed at least 55 bald eagles at three lakes in southwestern Arkansas, along with an unknown number of coots. No other birds ...
Widespread Genus Of Monkeys Gives Up Genealogical Secrets To Columbia Researchers
...except humans. New information about how, when
and where the macaques spread acrossthree continen...definingfeature, leading to considerable confusion when
appearance has been used toclassify them. There has even been some debate on whether macaques are a...
Regulator Of Fat Thermostat Found
Leptin leapt into the headlines when
it was identified in 1995 as a proteinthat trigger... hormone lost someluster as the ultimate diet drug when
scientists found last year that obesepeople already have high levels of leptin in their blood. This ...
Genetic "Short Circuit" Leads To Cleft Palate
...not just a single gene but a genetic circuit, that when
broken, causes cleft palate in newborn mice. The critical points of the circuit represent genes and gene products that interact with one another to direct palate formation. The "surge" that causes the circuit to break is an environmental assault in...
Virologists Track New Influenza Threat
... concern to virologists is a "shift," which occurs when
a radically different strain en...e. A shift is believed to occur when
genes from two different strains mix together. Kawaoka said the team will test ...
New Molecular Switch Is The Key That Unlocks DNA Repair
...tricate molecular machinery that fixes the cell when
for some reason, cell replication doesnt wor...found that the molecular switch is off when
a molecule of ATP--adenine triphosphate--is attached to the complex. When a phosphate molecule...
Increased Amount Of Enzyme In Brain May Be Marker Of Alzheimer's Disease
...tyrylcholinesterase (BChE), increases at the stage when
beta-amyloid plaquesin the brain become compact an...aque at an advanced stage of maturation, at a time when
the plaque is becomingassociated with pathogenic properties," Mesulam said. Other investiga...
Peutz-Jeghers Disease Gene Identified: Enzyme Loss Causes Polyps And Cancer
...e molecular cause was made exactly one year ago when
the responsible genetic factor was located on the tip of the short arm of chromosome 19. Affected individuals in several different families all shared the same chromosomal DNA segment around the anonymous DNA marker D19S886. Over the last...
Wake Forest University Study Takes Students In Flight With The Albatross
...Project's Web site . The project began Jan. 22 when
one of Anderson's biologists placed small radio tr... the answer to the big question, 'Where do they go when
they leave the nesting site?' along with us." The data from Anderson's study is also being distribu...
'Suicide Response' Gives Colorado State Researchers Important Clues On Preventing Bacterial Invasion In Crops Worldwide
... potato plants that give thissuicide response even when
they are invaded by bacteria for which they arehos... and whyplants do not express the suicide response when
they are exposed to bacteria forwhich they are hosts. "This has led to the identification of...
Mystery Of Vital Cell Protein Solved After 30 Years
...including ovarian,breast, and lung. Cancer occurs when
cell division runs amok. By binding to tubulin and causing the protein to lose its flexibility, taxolprevents a cell from dividing. With better knowledge of tubulin structure andits interaction with taxol, scientists believe that an even more effec...
Similarities Found In Human, Chimp Brains; Columbia, Mount Sinai, NIH Scientists Find Region That Controls Language Identical In Both Species
...eorized that the received wisdom might not be true when
heconducted magnetic resonance imaging studies of chimpanzee brains in an NIHstudy and noticed the discrepancy between the brain hemispheres. The authors of the paper proposed several possible interpretations ofthe experimental result, in ad...
Columbia Biologists Match Odor Receptor To Odor; Research Uncovers How Sense Of Smell Works; First Aroma Scientists Detect Is That Of Meat
...could bediscerned because they glowed bright green when
exposed to blue light. Professor Firestei...ctro-olfactogram. Electrical activity was highest when
the nerve cells wereexposed to octanal, an aldehyde that smells meaty to humans. Related aldehydest...
Study Reviews Medication Use In Elderly Cardiac Patients After Discharge
...ry patterns. "There are often unmet needs when
it comes to medications. The dosage ortype of medi...many things that can go wrong for cardiac patients when
so manymedications are involved." Another aspect of the study found that urban residents r...
National Laboratory Known For Environmental Technology Directing Attention On Solving Agriculture And Food Processing Problems
...on with agriculture resurfaced in asignificant way when
Pacific Northwest and various local and regional g...into commercial use. Their concept became reality when
the Agri-Business Commercialization and Development Centerwas established in Richland in 1994. ### ...
DNA Enzyme Works In Crystal Form; Yields New Insights Into Gene Copying
...ies DNA in living cells can also bemade to operate when
held in place in crystal form. Their achi...activity in crystal form. "We were excited when
we got our first crystals of enzyme with DNAincorporated," said Beese. "But we were also puzzled, be...
3-D Structure Of HIV Components May Pave The Way For New Anti-AIDS Drugs
...IDS drugs, becauseprevious studies have shown that when
it is crippled, HIV cannot spread to othercells. New drugs that block the action of the RNA component could be equallyimportant. The detailed structure of the protein-RNA complex, determined using a techniquecalled nuclear magnetic resonance (NMR) s...
Harvard Medical School Researchers Present Atomic Structure Of DNA-Replicating Enzyme Widely Used In DNA Sequencing
...about to attach another DNAbuilding block (arrow), when
it was frozen in action by the crystallizationprocess. Moreover, this work for the first time depicts a so-called replicativepolymerase. Various types of DNA polymerases occur in every cell of every livingthing, but the enzymes crystallized in earli...
Genetic Risk Factors For Anorexia Nervosa Sought
...ty, and a distorted body image of being overweight when
emaciated. Womensuffer from anorexia at rates ten times higher than men, and the disorder alsooccurs most often among women of middle and upper socio-economic standing. Abuseof laxatives and excessive exercise to promote weight loss are common behavi...
Careful Honeybee Breeding Combats Tracheal Mite Pests
...e eat. Cobey founded the NWC project in 1982 when
she was a commercial apiarist. Ohio State University is now expanding the NWC project to make breederstock available to industry....
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