Tag: "periodic" at biology news

Northwestern Scientists Discover How Herpes Simplex Virus Infects Cells

...ctions innerve cells and persist indefinitely with periodic reactivation of thevirus. Consequences of viral replication include cold sores and feverblisters, similar lesions on the genitalia, corneal destruction,encephalitis and severe disease of newborns. The virus can bind to manytypes of human cells but is...

NIH Team Discovers Endocrine Tumor Gene

...amilies at risk for MEN1 more easily and eliminate periodic blood tests for those with normal MEN1 genes. They hope to learn from MEN1 and its protein product, called menin , how endocrine tumors and cancers grow. The discovery also provides a target for the design of drugs to prevent or treat both benign ...

Widespread Genus Of Monkeys Gives Up Genealogical Secrets To Columbia Researchers

...isolated species of macaques furtherindicates that periodic lowering of sea levels allowed the spread and subsequentisolation of macaques on what are now offshore islands. Glaciers and riversystems probably also contributed to the isolation of populations and creationof new species. Macaques are mem...

Scientists Identify Protein Essential For Iron Absorption, Boost Understanding Of Iron-Deficiency Anemia

...riteddisease, for which the usual treatment is the periodic bleeding of patients. Other UB co-authors are Laura M. Garrick, Ph.D., clinical assistantprofessor of biochemistry, and Michelle A. Romano, research technician.Children's Hospital co-authors are Nancy C. Andrews, M.D., Ph.D.; Mark Fle...

The Fishing Hole Had Better Be Upstream From Commercial And Industrial Centers

...parking lots, McTammany says.Paved areas result in periodic high washes of water and pollutants into streams.The pollutants are those that land on the pavement, such as antifreeze and oil,as well as sediments containing toxic metals from asphalt. The research is an extension of five decades of studies...

USGS To Present Diverse Research At ESA Annual Meeting

...s. Drought and other economic pressures havecaused periodic release of some of the CRP land for hay production. USGS hasfound that some species such as the Horned Lark and Lark Bunting have actuallyincreased population the year after fields are hayed while other species havedeclined. This suggests that land-...

NYU Researchers Develop Simple, Predictable And Precise Technique For Arranging DNA Molecules Into Two-Dimensional Crystals

...arity between 6-arm DNA branched junctions and the periodic array of flyingfish in Escher's 'Depth' might lead to the rational approach to crystallizationdescribed here. He has been trying to implement it ever since, for the last tenyears at NYU. Further information is available at http://seemanlab4.chem.ny...

For Fruit Flies, Finding The Right Mate May Mean Offspring With A Longer Life Span, According To New Study

...ng, the word "chemistry" has nothing todo with the periodic table of the elements. Nothing's worse than finding outthere's no "chemistry" with your date. Something just doesn't feel right, andlater, a man or a woman will shrug and say, "There was just no chemistry betweenus." They may be more right th...

New Forest Owners Prefer Enjoying Their Land Over Working It

...heir forests. A suggested management plan includes periodic harvests, planting new treesor allowing natural regrowth. It also requires controlled burns. "There are environmentalists who say it's a good thing to leave the landalone and have no human intervention," Jacobson said. "But thatintervention is needed...

Major Clinical Findings By California AIDS Team: HIV Does More Than Kill Off T Cells

...o the DNA of dividingcells. The researchers took periodic blood samples from patients during the infusionand during the next two- to three-weeks. With the label serving as a marker fornewly divided cells, they analyzed samples by using a cell sorter to isolatepure populations of circulating T cells and a m...

Growing Up On Their Own: Smart Plastics Organize Themselves Into Useful Optical Devices

...together in a precise,ordered way to form a larger periodic structure." In the Science paper the scientists describe how hollow spheresassembled together to form photonic crystals -- structures that can create andmanipulate light signals precisely, transmitting certain wavelengths whileblocking others...

USGS Study Confirms An Urban Air-Pollution Problem At Mount Rainier National Park

...w concentrations. "It's well documented that both periodic episodes of high ozone exposure andchronic moderate ozone exposure can be harmful to plants," said Peterson. "Weknow this from other regions of NorthAmerica including national parks such as Sequoia and Great Smoky Mountains." Sources of ozone-produ...

Fighting diabetes: UD researchers move closer to chip-based control of 'smart,' implantable insulin pumps

...e early 1980s, providingpatients with an option to periodic insulin injections, Parker says. In clinicaltrials, meanwhile, some 600 diabetic patients worldwide are using MiniMedTechnologies' revolutionary implantable pump, which has not yet been approved bythe U.S. Food and Drug Administration (FDA). Compared...

USGS study casts doubt on role of fire suppression in causing catastrophic shrubland wildfires

...nalyzedcounties dominated by shrublands subject to periodic high-intensity(stand-replacing) wildfires -- from north to south, Monterey, San Luis Obispo,Santa Barbara, Ventura, Los Angeles, San Bernardino, Riverside, Orange, and SanDiego counties. Their investigation revealed several important facts. First, th...

Burrowing mayfly swarms signal a healthier ecosystem, USGS scientists say

...t regions of the lake. Otherinformation comes from periodic sampling of nymph populations, which began in1930, and from records of the incidence of mayflies in fish stomachs. In the western-most end of the lake, USGS biologists Bruce Manny and DonaldSchloesser have found that contamination of bottom sediments...

USGS fire research in the southeast

... that have adapted to, andmay be dependent on, the periodic presence of fire. Pines benefit from fire by reducing competition from hardwoods, says Snyder.Pine seeds germinate and survive better when mineral soil is exposed. And manyherbaceous species flower very little unless they have been burned recent...

USGS studies wildfire ecology in the western United States

...how that, in addition to the El Nio-La Nia cycles, periodic droughts and wet periods of much longer duration are also part of the normal climatic variability in the Southwest. A prolonged drought during the 1950s contributed to outbreaks of large, destructive fires at that time. However since then -- particul...

1999 Fall Meeting: Press conferences and special events

...tion, its relationship to El Niño and other periodic atmospheric variations, and its possible role in lowering surface temperatures in some far northern land areas. Galileo at Io Friday noon. This session will report results from spacecraft Galileo's closest ever fly-by of Io, Jupiter's volcanic moon...

El Niño triggers tropical forest reproduction

... where trees time their reproduction to match the periodic arrival of El Nino. Loss of the forest also could...al of the El Nino Southern Oscillation or ENSO, a periodic shift in tropical Pacific circulation patterns that brings drought to Indonesia. "We recorded f...

Research highlights from Pacific Northwest National Laboratory

...ace, thereby reducing inspection time and allowing periodic monitoring. Inspectors have a greater opportunity to interpret the data and make repair decisions with a complementary computer tool that gives a visual representation of the fastener and any fractures or degradation. 'Doctored up' cotton for impro...

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