Tag: "temperatures" at biology news
Duke Geologists Explore Alternative Way To Measure Ice Age Sea Bottom Temperatures
...nambiguous way to reconstruct how bottom sea water temperatures
have changed during and between past ice ages. In ...rovide more reliable measurements of ancient water temperatures
than the usual indicators. The usual method involves comparing the ratios of two forms -- or isotope...
Heat-loving Microbe Repairs Its DNA With Light
...ermophiles." Theseorganisms require extremely high temperatures
to grow andreproduce, and they have been recovered...ks well atroom temperature, which is far below the temperatures
at whichmetabolic processes of hyperthermophiles normally occur. "Photoreactivation has been observe...
New Grapes From Cornell Debut
...or not grapes will survive sudden hard freezes, or temperatures
that plummet by as much as 70 degrees as they did in just 12 hours last January, are questions of bottom-line survival. It can take 20 to 30 years of careful breeding, testing, and evaluation before a variety is ready for release. New grapes that h...
Core Spins Faster Than Earth, Scientists Find
... Earth's history. It will yieldnew knowledge about temperatures
at the center of the Earth andthe flow of planetar... pressure keeps theinner core solid in a region of temperatures
in the range of 7,000degrees Fahrenheit and possibly much higher. Fluidiron in the outer core has co...
NCAR Scientist Models Earth's Climate and Vegetation Patterns At Last Glacial Peak
... and its elliptical orbit around the sun. The cold temperatures
of the last glacial maximum resulted from the exis...und like much, it translates into regional average temperatures
that were colder than today's temperatures
by 2 to 20 degrees in various parts of North America. Abo...
Methane Deep In Ocean Crust Could Feed Chemical-Hungry Microorganisms
Evidence is surfacing that searing temperatures
and crushing pressures are creating a storehouse o...tions. The second happens as the rock cools to temperatures
of 400 C and lower. As the rock solidifies it fractures and cracks, seawater rushes in and the rock...
Urbanized Watersheds More Sensitive To Climate Change
...global warming, everyone is pretty confident that temperatures
will increase, but how much precipitation will change is hotly debated," says De Walle. "We are interested in the effects of precipitation because it is the least reliable of the two variables in the climate models." The global climate models c...
Hot 'Lanta: NASA, School Kids Team To Study How Trees Help Cities Keep Their Cool
... impact of Atlanta's growth on its air quality and temperatures
over the 1973-97 period," said Dr.Dale Quattrochi,...eters into parking lots and schoolyards to measure temperatures
at noon,NASA will send its Lear 23 jet aircraft overhead to scan the area and map heat patterns in A...
Ozone 'Chat Room' Provides Real-Time Air-Quality Research
...ation of ground-level ozone, and sunlight and high temperatures
play key roles in driving atmospheric levels to the damaging point. Current EPA ozone attainment standards state that an area cannot exceed .12 parts per million of ozone averaged over an hour more than three times during the past three years. ...
Scientists To Study Effects Of Global Warming On Wetlands
... and Wood Products. "We want to see how increased temperatures
and moisture affect ecosystem productivity and bio...depending on how different species react to higher temperatures
and moisture. "This could mean changes in the endangered species list," he said. On the othe...
Lethal Parasite Prime Suspect In Fish Kills At Salton Sea
...an be completed in less than one week at high temperatures
and in high saline conditions, like those currently present at the Salton Sea, it is expected that massive and lethal infestations can develop rapidly. Now that the parasite is present in the Salton Sea, and is able to repr...
Report Notes Difficulties In Eliminating E. Coli O157:H7 From Food Supply
...e use of steam to briefly heat carcass surfaces to temperatures
that will killE. coli O157:H7 without cooking the meat is a new, promising food safety method. Steam pasteurization has been reported to achieve up to a 1000-fold reductionof E. coli O157:H7 on treated carcasses. Beyond these processing measures, the...
Researchers Improve Treatment Of Industrial Waste
...obes, the researchers treat waste air and water at temperatures
up to 70 degrees Celsius, removing various polluta...st in treating the air and water effluents at high temperatures
because that's how they're emitted," says Allen, associate director of the Pulp and Paper Centre. "O...
Colorado State Biology Professor Says Fatty Acids, Not Shadow, Determine Outcome Of Groundhog Day Feb. 2
...s of these fatty acids. Theseasonal drop to colder temperatures
in September and October trigger a seriesof physiological events that cause the animals to begin hibernating. The most important catalyst for hibernation is a slow decrease in theanimals' body temperature from about 37 degrees to 5 degrees. W...
DT104 Advice:How To Slow Salmonella Spread
...under adverse conditions -- in pHs from 4 to 8 and temperatures
between8 and 45 degrees C. Salmonella are "facultative anaerobic" bacteria thatthrive in places with little or no oxygen, such as manure slurry pits andstagnant water. UV rays and beta and gamma irradiation have a bactericidaleffect on salmonella,...
Worm Wizardry: World's Most Heat-Tolerant Creature Suggests Enzymes For Drugs OrIndustry, UD Prof Says
...pable of surviving sustained,long-term exposure to temperatures
up to 176 degrees Fahrenheit (80 degreesCelsius). ...t Certain simple, "prokaryotic" organisms grow at temperatures
above 235.4 degreesF (113°C), Cary says, but such high heat kills eukaryotes. "The nuclear andmi...
At Life's Most Sensitive Stage, Embryos Cope With Stress
... survival strategies in the intertidal zone, where temperatures
in asingle day range from the chill of ocean waves...t point, the proteins offered some protection from temperatures
that rose ashigh as 88 degrees Fahrenheit. For the first day of life, however, the earlyembryos had ...
Study Of Microbes May Hone Predictions Of Mining Impact
... Results showed that Thiobacillus prefers moderate temperatures
and lower levels of acidity. Leptospirillum survives at significantly higher concentrations of acidity and higher temperatures. The fact that Leptospirillum thrives in such conditions, suggests its role in accelerating acid mine drainage is more sign...
Global Warming Would Foster Spread Of Dengue Fever Into Some Temperate Regions
...e earth'sclimate have predicted that rising global temperatures
will increase thepotential transmission of the den...uito Aedesaegypti, often co-exist, but where lower temperatures
now limit diseasetransmission. Lead author Jonathan Patz, MD, MPH, from the Johns Hopkins School of ...
Can Plants Influence The Climate?
...orests, which are darker than tundra, createwarmer temperatures
in the subarctic. This allows boreal forests to survive highlatitude environments and maintain the conditions of their own existence. The coupling of GCMs with models of the terrestrial vegetation to investigatevegetation feedbacks on climate is st...
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