Tag: "seen" at biology news

Bacterial Toxin Surprises Scientists

...a few amino acids. Never before has anyone seen such a large portion of protein cross to the opposite side of a membrane to open a channel. This protein movement is especially surprising because it requires a long stretch of water-soluble amino acids to cross a membrane ...

Key to Triplet Repeat Brain Diseases Open Door For New Way To Understand, Treat Genetic Diseases"

...ysical and intellectual deterioration,such as that seen in Huntington's disease patients. Furthermore, their findings may answer why the number of genetic repeatsin these diseases determines how severe symptoms will be: More repeats producea protein that holds this "energy" enzyme more tightly, producin...

Dating A Caveman

...ate precipitates, forming the spectacular deposits seen in limestone caves, such as stalactites, stalagmites and flowstones. Fortunately for geochronologists, such limestone-forming groundwater often also contains minute quantities of dissolved uranium, which gets incorporated into the limestone crystals ...

Mutate Or Die: New Polymerase Gives Desperate Yeast An Option

...yeast, including basesubstitutions, the type often seen in cancer cells or oncogenes like p53 or ras in humans. His laboratoryis now searching for counterparts in humans to the two genes that code for zeta, and scientist Peter Gibbs has found onewhose sequence bears the markings of a zeta polymerase. ...

Humble Pocket Gophers Shed Light On The Genetic Fortitude Of Cheetahs

...etic variation--a degree of sameness close to that seen in inbred laboratory mice. Key evidence came from a surprising 1985 experiment in which unrelated captive cheetahs accepted skin grafts from each other, a sign that their immune systems were genetically almost identical. However, in recent years some...

Protein Glitch May Be Early Problem In Inherited Alzheimer's

...ectly causing the widespread damage to nerve cells seen in FAD, but it may interfere with other proteins that could. Like dominoes falling, a change in presenilin sets off a chain reaction. "Think of it as a cascade," says Sisodia. "We don't know how many steps there are in this cascade, but we have a th...

Asian Beetle, New In This Country, Threatens Brooklyn's Shade Trees

...China, this is the first time this beetle has been seen outside of Asia, said E. Richard Hoebeke, Cornell ...ca, N.Y., to determine the species. Klass had not seen the species before and showed it to her colleague, Hoebeke. "I gasped when I saw it," Hoebeke said...

Changing Continental Runoff Patterns Could Change Ocean Circulation

...models of the ancient oceans. "We have already seen some of the consequences of changing surface waterways," says Karen L. Bice, graduate student in geosciences. "The Colorado River barely flows to the ocean and the Aral Sea is drying up. We do have the capacity to alter the amounts of freshwater t...

Scientists Identify Retrovirus-Like Components In Corn Genome

...iral diseases. Active retroviruses have never been seen in plants. "Despite the fact that more than half its genome consists of this retrovirus-like DNA, corn is not known to have any retroviral diseases," Bennetzen says. "If these retrovirus agents are there, but don't succeed in making the plants sick, ...

Plants Have Future As Environmental Clean-Up Agents

...ygen is present. "In some cases, we have actually seen 10 pounds per acre a dayremoved," Davis said. "It really depends on what's present there." In either case, using plant-based bioremediation is cheaper thenmore traditional methods of clean-up such as pumping and treating orexcavation, according to L...

Methane Deep In Ocean Crust Could Feed Chemical-Hungry Microorganisms

...rapped in rock as bubbles so tiny that they can be seen clearly only with a microscope. It is more likely that the methane may be used by deep-sea microorganisms. As the rock ages it continues to fracture and admit seawater. It could be that the seawater carries microorganisms down into the rock where...

Bottom-up Ecological Processes Better For Clear Waters, Study Finds

...sponsible for the dramaticdecline in water quality seen in several of the Great Lakes during the 1960sand 1970s and is responsible for the often abysmal water clarity of urbanlakes and ponds. Lake Tahoe in the Sierra Nevada, for example, is losingabout one foot of its famous clarity a year due to algae. ...

Molecular Imposter Rebuts Long

...hing shape. Kool believes researchers haven't seen these results beforebecause they've used synthetic DNA bases with shapessignificantly different than the bases they were trying to mimic.When correct DNA synthesis failed to occur with thesemisshapen bases, researchers blamed the lack of hydrogen bon...

Malnutrition Impacts Longevity Of Females More Than Males And Shows Gender Differences In Fruit Flies

...that the early-life surge in the death rate is not seen in sterileprotein-deprived females. "It's likely that this is a particularly vulnerable window of timefor females because of the nutritional demands of reproduction and egg-laying,"said Carey. "These changes may account for the leveling off of thede...

Scientists Urge Further Study Of Alarming Coral Reef Decline

... of the rapidly declining animal populations canbe seen in the shrinking number of sponges living on coralsaround San Salvador island. Within three years beginning in 1994,the number of sponges observed by Ostrander and his colleaguesdeclined by about 50 percent. "We now know that San Salvador isnot uniqu...

Virus May Be Linked To Obesity -- Early Findings Hint At Relationship

...dy-negative obesepeople, a pattern similar to that seen in animals infected with Ad-36. Butthe two groups ...t occur with a new infectious disease, as has been seen with theAIDS virus. A great deal of further research is necessary to determine ifthe global epidemic...

Isle Royale Moose Continue Decline

... last year and ate their dried up hides. I'd never seen that before." The annual wolf-moose study on Isle Royale is funded by the National Park Service, the National Science Foundation, and Earthwatch....

Duke Study Shows Early Marrow Transplant Key To 'Bubble Boy' Disease Cure

...SCID. "This once-fatal disease should be now seen as a pediatric emergency,a condition that needs immediate diagnosis and treatment," said Dr.Rebecca Buckley, chief of Duke's division of pediatric allergy and immunology. Buckley said early diagnosis of SCID is rare because doctors do notroutin...

Beset By Human Competition, Penguins Must Take Marathon Food Trips To Avoid Starvation, A Researcher Finds

...tragedies during her years at Punta Tombo. She has seen chicks hatch and slowly starve and die as the mother patiently waits for her foraging mate to return. Often, the parents will have only enough food for one chick, and the sibling is left to starve. "The rule seems to be, feed the heaviest chick first...

Merging Physics And Neuroscience: First Evidence Of Self-Organized Criticality In Brain Networks

...eristic of self-organized criticality. Previously seen onlyin physical processes, self-organized critical...odel createsnoise-sustained waves similar to those seen by Cornell-Bell in thebrain tissue. Jung's model obeys the same power law observedexperimentally in...

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