Tag: "temperatures" at biology news
Heat damage to "photosynthesis engine" in symbiotic algae may be among major causes of coral bleaching
...confirms it. It turns out,however, that the higher temperatures
aren't necessarily damaging thereef-building coral...ng has arisen. During the summer of 1997, seawater temperatures
in the Florida Keysremained above normal for weeks on end. The team sampled colonies of thedominant ...
Catastrophic draining of huge lakes tied to ancient global cooling event
...ce core data taken by scientists in Greenland show temperatures
droppedby as much as 15 degrees Fahrenheit in cent...nland is almost uninhabitable because of itscolder temperatures
and lack of viable agricultural land for crops andlivestock. But if an enormous amount of fr...
Plakin proteins brace nerve axons and allow for the transport of neurotransmitter vesicles
...esistant to cold and colchicine. Exposure to cold temperatures
or thechemical colchicine normally cause microtubules to depolymerize, or fall apart,within minutes. With the addition of the new plakin, microtubules were stableover much longer time periods. Next, Yang removed the BPAG1 plakin gene from neurons, wh...
Heatstroke killed four football players during 1998, expert urges precautions
...'s likely players were better ableto tolerate high temperatures
and humidity. During 1998, seven football players died across the United States as adirect result of injuries suffered on the field, the study showed. Seven otherplayers - including the heatstroke victims -- also died, but those fatalitieswer...
Drought worsens, spreads
...l the effects of the droughtas well. In Ohio, high temperatures
combined with lower-than-normalprecipitation are causing crops to wither and streamflows to dry up. In Indiana,low stream flows have been reported in the Silver Creek and the East Fork of theWhite River where streamflows are 55 percent below normal. ...
Discovery sheds new light on species diversity in the ocean
...ch spot in the ocean with 90 percent accuracy. The temperatures
arederived from satellite observations that measur... predicts diversitynearly as well, suggesting that temperatures
at the sea surface are highlycorrelated to the structure of the water column beneath the surface. ...
LSU Ag Center researchers look for better ways to assess pollution in Tangipahoa River
... of taking a water sample andincubating it at high temperatures
where the bacteria readily grow. The numberof coliform cultures that result is considered to be a measure of the fecalcoliform content in the water. The test is believed to be effective becausefecal coliform can live in warmer environments than oth...
Cotton fabrics damaged by high dryer temperatures
... "While cotton can be dried at the relatively high temperatures
in clothes dryerswithout immediate catastrophic damage, serious abrasions and cracking damageoccur with repeated dryings," says the study's lead author, Young-Sook LeeBuisson, Ph.D., of the U.S. Department of Agriculture's Southern RegionalResearch C...
Molecular inner workings of fruit fly clock explained
...thresholds forpain, blood pressure, and basal body temperatures
to hormone cycles," sayssenior author Amita Sehgal, PhD, associate professor of neuroscience and aHoward Hughes Medical Institute assistant investigator. In previous work, Sehgal and her team found that the fruit fly clock iscontrolled by the cycl...
Tracks in iron provide an insightful map of microbial world
...eous rock is forged deep in the Earth at very high temperatures
wherelife is absent. It also can contain iron. Working in collaboration with scientists from NASA's Jet Propulsion Laboratoryand the Institute for Great Lakes Study at UW-Milwaukee, the Wisconsin teamsampled the isotopic composition of iron from the ...
Climate change and greenhouse gases: The scientific literature reviewed
...beyondthat stemming from natural processes, global temperatures
have increased onaverage by 0.5 to 1.0 degrees Fahrenheit (0.3-0.6 degrees Celsius). The authors predict that further increases in greenhouse gases will causechanges in the climate system. These include increases in average surfacetemperature, increa...
Study indicates Indian Ocean monsoon similar to El Niño phenomenon in Pacific
...miles. Theteam measured gradient changes in water temperatures
and salinity to more than1,500 feet deep, and used...ta from European satellites to measure atmospheric temperatures
andwind speeds from the sea surface to about 12 miles high. The Indian Ocean generally has three "a...
Uncovering the role of water vapor in climate change
With global temperatures
rising, scientists from around the world arestudyi...ientist Rong Fu willdiscuss how warmer sea surface temperatures
in tropical oceans lead to anincrease in atmospheric water vapor. Because sea surface temperatures
Global warming threatens state's quality of life
...ata, scientists believe California's averagewinter temperatures
will run 5 to 6 degrees warmer in the years between 2030and 2050, said Melack, who studied how climate change might affect water availability and quality. That means more precipitation falling as rain and less as snow, which could lead to more winte...
Giant plant-eating dinosaur found; two cast skeletons to be unveiled
...d in mid stride have been constructed. Toiling in temperatures
exceeding 120, Sereno's team excavated tons of bone and rock on a 1997 expedition and then spent two years cleaning and studying the bones. "With 95 percent of its skeleton preserved, the new species stands as the most complete long-necked dinosaur ...
Evidence for historic global warming published in Science
...ace waters to sink, and intermediate to deep ocean temperatures
to rise by approximately 4 to 8 degrees centigrade...er partial pressure of carbon dioxide and elevated temperatures
quickly opened high-latitude migration routes for the widespread dispersal of mammals. Over several ...
1999 Fall Meeting: Press conferences and special events
...iations, 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. It will consist of new findings since the November 19 NASA Space Science Upda...
Meet Conan the Bacterium
...ile habitats on Earth cover a range of conditions: temperatures
near boiling or below freezing; a nearly total lack of water, or water that ranges from alkaline to acidic or salty; non-carbon foods; and a lack of oxygen. One of the tricks that less durable lifeforms use to survive such tough times is to hibernate...
One theory solves two ancient climate paradoxes
...ree months. If this sunlight were to fall on land, temperatures
would be hotter than 125 degrees Fahrenheit in sum...apidly, during the three-month, 24-hour night, the temperatures
would plummet. Twenty-four hours of sunlight for three months on water does not get as hot, but also...
Life in the inferno: researchers identify factors that determine where microorganisms can survive in the hellish world deep underground
...ence as part of its environmental mission. High temperatures
ensure nothing can live too far below the earth's ... dry land. Near geothermal hotspots, subsurface temperatures
rise much more rapidly, and life survives only near the surface. In deep ocean sediments, where kilo...
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