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Tag: "temperature" at biology news

Darkness unveils vital metabolic fuel switch between sugar and fat

...wer body temperature, a sign of torpor. Core body temperature measurements confirmed their lethargic state. Mice kept in constant dark also ate less, lost weight, and showed evidence of increased fat consumption, all hallmarks of hibernation in larger mammals. The authors note that 5'-AMP has previously been...

Warming trend may contribute to malaria's rise

...annot be ruled out. "Our results do not mean that temperature is the only or the main factor driving the increas...2002 study found no significant changes in average temperature in the highlands of East Africa, where malaria has become a serious public health problem, prompting...

MIT: Oceans are a major gene swap-meet for plankton

...exploit changing conditions such as altered light, temperature and nutrients. The work will be reported in two ...itude more abundant than all of the rest, and that temperature appeared to be very important in determining their distributions." Subsequent laboratory experiments...

High-tech tags on marine animals yield valuable data for biologists and oceanographers

...nd the depth and duration of dives, as well as the temperature and salinity of the seawater and how that changes ... breathe. Costa's group has been providing water temperature and salinity data gathered by California sea lions to physical oceanographer Yi Chao at the Jet Prop...

Marine mammals are on the frontline of failing ocean health

...us to people. Habitat loss and increases in water temperature also allows both pathogens and disease vectors to move into new areas. "The rest of the world is likely to see similar changes as we go forward in time. We're just seeing change more rapidly in Alaska," says Sandifer. "What is happening in the A...

Scientists discover interplay between genes and viruses in tiny ocean plankton

...xploit changing conditions, such as altered light, temperature and nutrients. "These results tell us that even the smallest organisms show genetic variation related to the environment in which they exist," said Philip Taylor, director of the National Science Foundation (NSF)'s biological oceanography program, w...

2005 was the warmest year in a century

...n a century, according to NASA scientists studying temperature data from around the world. Climatologists at NAS...ted that the highest global annual average surface temperature in more than a century was recorded in their analysis for the 2005 calendar year. Some other resear...

Tiny polyps gorge themselves to survive coral bleaching

...ical organisms survive in a narrow 4-to-6-degree C temperature range centered about 26 degrees C. While the exact... all must live within that tight range. When the temperature climbs above that range, even by only two degrees, the result is a bleaching event. Within a two-yea...

Of mice, men, trees and the global carbon cycle

...at it would have serious problems maintaining body temperature and eating fast enough to keep up. Instead of a one-to-one ratio between body size and metabolic rate, as an animal's body weight quadruples, its respiration rate only triples. In contrast, when Reich and his colleagues studied 500 plants from 43 s...

UC Berkeley researchers create a biologically-inspired artificial compound eye

...Lee and his team borrowed from nature, using a low temperature system, photopolymerization, and self-aligning, se...he resin into the dimpled molds, baked it at a low temperature just long enough to slightly harden the material, then turned out the contents: little resin hemisph...

Wisconsin scientists discover a master key to microbes' pathogenic lifestyles

...self at a comfortable 37 degrees Celsius, the body temperature of a human or other animal, it kick starts a genetic program that transforms the fungi into pathogenic yeasts. "This is a global regulator that sends signals down a molecular chain of command and governs a series of vital genetic programs," Klein ex...

Tropical Atlantic cooling and African deforestation correlate to drought, report scientists

...cean, there is a larger gradient between the ocean temperature and the land causing less moisture to be pulled fr...sts are able to correlate that information to past temperature changes in the ocean. In analyzing these records for the past 10,000 years, the scientists found thr...

NASA's AURA satellite peers into Earth's ozone hole

...or in how much ozone is destroyed each year is the temperature of the air high in the atmosphere. As with temperatures on the ground, some years are colder than others. When it's colder in the stratosphere, more ozone is destroyed. The 2005 ozone hole was approximately 386,000 square miles larger than it would h...

T-rays: New imaging technology spotlighted by American Chemical Society

...imaging has exploded as a result. Objects at room temperature emit thermal energy in the THz range that can be used to sense and image objects. A particular advantage of T-ray systems is that they can also give spectroscopic information about the composition of chemical and biological material, and are safer fo...

Superconducting magnet attracts molecular research

...tic field were bathed in liquid helium to drop the temperature to 2 degrees Kelvin or minus 456 degrees Fahrenheit. Once the coils were supercooled, electric current was able to pass through them without resistance, creating the magnetic field. Once at field, the magnet uses no power at all, although the large l...

Asleep in the deep: Model helps assess ocean-injection strategy for combating greenhouse effect

...the fate of CO2 injected into oceans under various temperature and pressure conditions. Zhang's model shows that ...s---the approximate depth at which, depending upon temperature and pressure, liquid CO2 becomes a gas. One solution is to make the droplets smaller. "Droplets inj...

Microbes under Greenland Ice may be preview of what scientists find under Mars' surface

...n surface should look for them at depths where the temperature is about 10 degrees Celsius (18 degrees Fahrenheit... meters - some 1,000 feet - underground, where the temperature is slightly warmer than freezing and such microbes should average about one every cubic centimeter, ...

Overfishing may drive endangered seabird to rely upon lower quality food

...nterparts. The researchers found that while ocean temperature was important, the era when the birds lived had a ...diets experienced less change, regardless of ocean temperature or era. The researchers explained that this might be due to the fact that krill and young rockfish a...

Health of coral reefs detected from orbit

.... "However satellite sensors measuring sea surface temperature such as Envisat's Advanced Along Track Scanning Ra...pplied to prioritise reefs that are subject to sea temperature heating anomalies-thus focusing the MERIS based bleaching detection. Australia's Great Barrier Re...

Adult stem cells aid recovery in animal model of cerebral palsy

...energy metabolism, response to sudden increases in temperature (heat shock), and ion transport across cell membranes. Future work focusing on the 67 genes hypothesized to reside in the divergent regions should yield interesting clues to the identity of genes that drive speciation, and the mechanism by which they...

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