Duke Researchers Discover Central Role Of Nitric Oxide In Hemoglobin Action
...contact? Stamler suspected that NO had to exist in some other form in the blood,apart from the "free" NO that is made in the vessel and destroyedby hemoglobin. So he and Jia worked with the Bonaventuras, who are expertson hemoglobin, designing investigations using blood from humans and rats. ...Humble Pocket Gophers Shed Light On The Genetic Fortitude Of Cheetahs
...apt effectively to changes in the environment. You exist at a price if you have low genetic variation. It's like having lots of clones of yourself." If animals within a population are similar to each other immunologically, Sanjayan adds, "That doesn't bode well for disease resistance. If a new disease aris...Study Examines How Mechanisms Evolve To Regulate Bee Development
...es -- who tend the hive and, when older, forage -- exist inthe drones, researchers found. When the hormone level was elevated, dronesbegan to seek virgin queens earlier than same-aged drones whose levels werenot altered. The higher hormone levels, in effect, caused the drones togrow up faster. This is simi...Bacterial Protein Structure Hints At Mechanism Of A Class Of Premature Aging Diseases
... Institutes of Health. RTP has been known to exist for 20 years, but it wasn't until two yearsago that its structure was revealed by Bastia and White. "This [recent]work relates structure to function and takes us one step further in understandinghow RTP works," Bastia said. When DNA replicates,...Merging Physics And Neuroscience: First Evidence Of Self-Organized Criticality In Brain Networks
...llion"excitable" units. Each of these units could exist in one of threestates: quiet, excited, or quiescent (recovery). The units areweakly coupled to one another, modeling the relationship betweenbrain astrocytes. Introducing random thermal noise into Jung's model createsnoise-sustained waves similar t...Study Focuses On How Plants Help Toxic Pollutants Travel Around The World
...to determine the amounts of chemicals that already exist in theenvironment. "We'll close up the system and measure what's in there, then startvarying the concentrations of chemicals in the chamber," Hornbuckle said. Theseinitial tests are designed to see how the walls, which are coated with aTeflon...One Chimp Can Perceive States Of Awareness In Others
...hese experiments removedmost of the variables that exist in the wild and tested if one chimp wouldwarn another specific chimp of a threat. "They responded dramatically when a threat was present but onlywhen the other animal in the pair was uninformed," Boysen said. Since the strongest reactions...Computer Model Offers New Insight On Bacterial Photosynthesis
...e witha different method. Because purple bacteria exist in mud, they have to use what little sunlightthat is unharvested by plants quickly and efficiently for their own metabolism,said Klaus Schulten, director of the Beckman's theoretical biophysics groupand holder of the U. of I. Swanlund Chair in Physic...Mutant Gene Not Sole Explanation For Hiv Non-Progression
...idence that protective immunity may exist in HIV infection," says Dr. Fauci. "We owe an enormous debt to the many patients who have come to Bethesda to take part in our studies. The contribution that these individuals have made to ...Limits Of Life On Earth: Are They The Key To Life On Other Planets?
...ents may be analogous to the harsh conditions that exist now, or have existed, on earth and other planets. ... the earth's surface. Very few microbial samples exist from deep within continental crust, because coring is expensive. But now Tullis Onstott of Princeto...Geologist Finds Evidence Supporting Mysterious Ancient Sea
...he believesdemonstrates a narrow Iapetus Ocean did exist during theOrdovician but closed off and disappeared by the Silurian 420million years ago. "If you look at the younger beds 420 million years ago there is no more Iapetus Ocean," said Huff. "The question iswhether there ever was one." The best way ...Husband-And-Wife Team Embarks On Search For Genes Linked To Schizophrenia
... "We'll look to see if illness and genetic markers exist together, and we'll analyze genetic patterns from ill person to ill person. We'll develop a description of each suspect gene and determine how often it occurs with illness." An important aspect of the study will be a Halpotype Relative Risk ana...Biodiversity Worth $2.9 Trillion
...alysis. Genes for perennial cereal grains already exist in wild plant species, they said, estimating the worldwide value of a perennial grain system at $170 billion a year. "We hope assessments such as this," Pimentel said, "can serve as a foundation to develop strategies and policies to preserve biologic...Increased Amount Of Enzyme In Brain May Be Marker Of Alzheimer's Disease
...deposits of diffuse (andharmless) beta-amyloid may exist in the brain for many years before leading toAlzheimer's dementia. The factors that contribute to the transformation of the beta-amyloidfrom a relatively inert to a disease-causing state remain unknown and mayinvolve interactions with addit...Peutz-Jeghers Disease Gene Identified: Enzyme Loss Causes Polyps And Cancer
...s during the first two decades of life probably exist and can now be identified. A special screening program for individuals with mutations in the STK11 gene is highly recommended to detect early stages of potentially malignant tumors. The ultimate aim in this field of research is to iden...Termites' Attraction To Small Amounts Of Carbon Dioxide Lures Pests To Their Deaths
...n genetic predispositions to elements that already exist in nature to changetheir behavior or lure them to their deaths."...Shrews May Predict Environmental Degradation
... but they share a common denominator -- all shrews exist in very small areas that must sustain them for their entire lives. Certain species, Ray says, are particularly susceptible to environmental change making them a highly sensitive ecosystem indicator. Ray says there are more questions than answ...Technique Gives Researchers New Look At Genetic Activity In Living Cells
...e separation. Such a mechanism had been thought to exist only in eukaryotic organismssuch as plants and animals....Corn Rootworm Changing Behavior, Posing New Threat To Crops
...beetles' presence last year. The problem does not exist or is minimalwest of the Illinois River and in the southern third of Illinois. The logical conclusion is that the problem eventually will spread tothe Atlantic coast. "Given what we know about prevailing winds andstorm patterns, it's only a matter ...New Sensor Will Detech Chemical And Biological Pathogens At Incredibly Small Doses
...ates there are several hundred WBAs that currently exist that caninduce battlefield and civilian casualties that can now be detected. "The newbiosensor approaches the sensitivity of a dog sniffing airborne chemicals,"Velander adds. Another advantage of the new sensor is its speed. Current technology fordet...