Tag: "reaching" at biology news

Stronger Evidence That Global Climate Change Can Reduce The Variety Of Life

... and geographical distribution of the sun's energy reaching theupper atmosphere strongly influence Earth's climate over tens of thousandsof years. Today the Earth tilts at 23.5 degrees relative to its plane oforbit, causing the seasons, but tilt has varied from about 22 to 25 degreesin the past due to changin...

Resistance To Leptin Contributes To Obesity

...iving leptin through ICV infusion rapidly lostfat, reaching their lowest weight by the eighth day of treatment andmaintained it for the remainder of the 30-day infusion period. The micereduced their food intake to its lowest level, a drop of more than 50percent, by the third day, but their food intake crept ...

Oak Regeneration In Some Ohio Forests Is Failing, Researchers Find

...ct is having thedesired effect -- more sunlight is reaching the forest floor, which could begood news for oak seedlings. "Although we're still analyzing the data, I would expect to see asignificant increase in light in the understory," he said. "But we will need tomaintain this high-light condition fo...

Bowman Gray Scientists Find Novel Way To Block AIDS Virus

...produced CXCR4 deep withinthe lymphocyte from ever reaching the cell surface. The key is the alteration ofwhat is known as the SDF-intrakine, which binds to the CXCR4 and traps themolecules inside the lymphocyte. Hence there is no place on which the HIV-1 virus can land to infect thecell. "Th...

Hormonal Changes At Puberty Can Mask High Cholesterol In Blood

...en will definitely have to be screened again after reaching youngadulthood," says Kwiterovich. The Dietary Intervention Study in Children study found that sexual maturationhad the most powerful influence on cholesterol in boys and girls, having agreater effect than a low-fat diet. The study included 663 girl...

Banning Chemicals To Protect Ozone May Aggravate Global Warming

... atmospheric lifetimes and mostly decompose before reaching theupper atmosphere," Wuebbles said. "Effects on ozone depletionfrom some of these compounds are likely to be negligible. Nevertheless,they are still being tightly regulated and eventually the intention of therulings is that they be banned entirely...

New Company To Turn UNC-CH, Army Inventions Into Improved Vaccines

...hnston and colleagues, launching the company means reaching a goalthey have been working toward for more than 10years -- clinical testing, initially for vaccine applications, he said. "Getting ready for clinical trials is a tremendously expensive processthat isn't always practical in a university sett...

Females' Siren Song Initiates Courtship Duets In African Frogs, Columbia Biologists Find

...ales swam directly towardsvocalizing males, and on reaching the barrier began rapping. That song had adramatic effect on males, which launched into intense bouts of answer trillingand swam rapidly in search of the source. The research team was not certain that duetting was what brought malean...

Amphibian Mortality Due To UV Radiation

... which also canaffect the amount of UV-B radiation reaching amphibians. UV-B radiation also may impair disease defense mechanisms, makingamphibians more susceptible to pathogens and parasites that may hamper normaldevelopment and increase mortality, Kiesecker said. For example, he foundincreased mort...

Yale Announces New Biotech Firm

...evinggrowth of more than 185 percent on its way to reaching worldwide sales of$398 million. Millions of people with the HIV virus have been treatedwith the medication, which has been shown to significantly enhance andextend lives. Yale also expects to earn significant royalties this year from aLyme d...

New Machine Slashes Time, Cost To Make Unique Lenses

...erparts to adiameter of about an inch. Even before reaching the mass-production stage, companies often spend hundreds of thousands ofdollars creating asphere prototypes the old-fashioned way; Goliniexpects that much of the demand for the new grinder will actuallycome from large companies that spend heavily on...

Scientists Say Latently Infected Cells May Stoke the Fire of HIV Replication

...lating virus declines rapidly after reaching peak levels soon after initial infection. Dr. Paul and his co-authors, Zvi Grossman, Ph.D., of Tel Aviv University in Israel, and Mark B. Feinberg, M.D., of Emory Universit...

Montana And Other Scientists Report On Life In The Ice

...hn Priscu and his team would utter expletives when reaching a depthof about six feet, or two meters. On their way down to liquid water, which lay under a permanent ice layerabout 15 feet deep, they invariably struck a layer of sediment. "At first I cursed the sediment layer because it dulled t...

Feature: Biomaterials Are Transforming Medicine

...sales in the drug-deliverysector to almost triple, reaching $25 billion by 2006. For medicines like insulin, research is also exploring methods foradministering doses in preprogrammed "pulses," or on demand. Using anoscillating magnetic field, a wristwatch-like device could, for example, releasea dos...

News Backgrounder: Duke Primate Center Successfully Fosters Mysterious Aye-Ayes

... "We now have enough of these young animals reaching maturity so that wecan compare wild caught with captive born," said Erickson. "That's reallyimportant, because we want to make sure that we're giving them all they need tobe real aye-ayes. If we ever think about re-introduction of these animals, wewa...

CSIRO Reduces 'Cellulite' In Oranges

...e and can cause them to split in transport before reaching the consumer," Dr Treeby says. "The financial impact of albedo breakdown can be dramatic. Every one percent increase in the problem in the Australian orange crop wipes an estimated $1 or $2 million off the potential returns to producers," sa...

Rock-Eating Microbes Could Signify Life On Mars

... Microbes have been found near temperatures reaching 113 degrees C, andin freezing brines some 15 degrees below zero, Fisk pointed out. "The surface of Mars may be too cold to find life unless there is a hotspring bubbling up," Fisk said. "But every planet has a temperature gradient;they get ho...

Study Pinpoints Rare Molecular 'Transitions' As Possible Cause Of Skin 'Photoaging'

...ncreasing amount of thesunlight energy it absorbs, reaching a maximum at 340, Simon's and Hanson'sreport said. At its maximum, the absorbed energy is "almost three times the energydifference between the two isomers of UV-A," the authors wrote. "Consequently,we can conclude that photoisomerization is n...

Rapid Population Growth Is Still A Problem

...nvoluntary childlessness)prevent some couples from reaching their desired family size. The mostplausible pattern is the one now assumed by the United Nations: a modest rise infertility to a level somewhat below replacement, with large population declinesunlikely. Different Policies For Each Demographic Cond...

Inbreeding Natural Among Trees But Not Without Costs, University Of Georgia Forestry Research Shows

...ormed and many die suddenly andinexplicably before reaching maturity. A team of scientists at the University of Georgia and the New ZealandForest Research Institute have discovered why. Using inbred Monterey pines as amodel, they identified seven genes that can cause the pine to die, far more thanthe...

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