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Tag: "temperature" at biology news

Temperature regulates circadian clock in zebrafish

...o light cycles, much less is known about how daily temperature cycles affect the clock's timing mechanism in vert...hiri, Nicholas Foulkes, and their colleagues study temperature related responses at the genetic and molecular level in zebrafish. This genetically tractable mode...

Elevated temperature enhances success of viral cancer therapy

...ogically or by incubating the cells at an elevated temperature similar to that experienced by humans when they have a fever, the RNA export function was restored. Therefore, induction of the heat shock response could rescue ONYX-015 replication in resistant tumor cells. According to Dr. O'Shea, "Our data sugges...

Plankton can run, but can't hide from basking sharks

...ing pop-up tags that measure swimming depth, water temperature and light levels. The tags were programmed to detach themselves from the sharks at a set time, float to the surface and then drift with the currents like a "electronic messages in bottles", before being washed up on beaches and found by the public. ...

Going To Extremes To Improve Human Health

... of simulating altitude up to 18,000 feet, holding temperature constant at a set point between 14 and 122 degrees Fahrenheit, and controlling humidity anywhere from 10 to 95 percent. The chamber is so finely tuned that it can swing from the coldest to hottest setting in 30 minutes. "The presence of the environm...

Researchers use 3-D imaging system to unveil swimming behavior of microscopic plankton

... by tracking well-defined cues, for example, sharp temperature gradients that occur across downwelling fronts where cold and warm waters meet. Vertical currents are common in many oceanic regions, including mid-ocean fronts, shelf breaks, submarine canyons and submerged banks. "That small zooplankton are capabl...

ORNL, UC Berkeley unravel real-world clues to Earth's mysteries

...rickling from the mine has a pH of about 0.8 and a temperature of 107 degrees Fahrenheit. "This microbial community is thriving at the extreme edge," said Bob Hettich, a co-author and member of ORNL's Chemical Sciences Division. "A pH level of 0.8 is like swimming in sulfuric acid, so we'd like to know how this...

Study Finds Moderate Hypothermia A Safe Treatment For Traumatic Brain Injury In Kids

...ned for 48 hours is safe compared with normal body temperature (36.5-37.5 degrees Celsius). By inducing hypotherm...p other more effective treatments." Lowering body temperature can help control brain swelling and intracranial pressure, which can also exacerbate secondary injur...

Scientists discover global pattern of big fish diversity in open oceans

...fferent open ocean "habitat" features. Sea surface temperature and the level of oxygen in the water were the most...eas with warm waters, sufficient oxygen, and sharp temperature gradients that serve to aggregate food supply such as zooplankton and small fish. "The peak in big ...

Life detection instrument passes key test on road to Mars

...ss or a bug for ages, and contending with dust and temperature extremes that left her either freezing or sweating, Skelley ran 340 tests that proved the instrument could unambiguously detect amino acids, the building blocks of proteins. More importantly, she and Mathies were able to detect the preference of Eart...

Climatologists discover deep-sea secret

...served that at several periods in history when the temperature has increased in the northern hemisphere, the southern hemisphere has entered a cooling period, which creates a decrease in the amount of deep water transported to the Atlantic Ocean from the south. The opposite effect also took place: when the clima...

Unlike other mammals, newborn dolphins and orcas stay active 24/7 during first months of development

...s reduce danger from predators, help maintain body temperature until mass and blubber insulation develop, allow frequent respiration at the surface, and facilitate rapid growth of brain and body and related behavioral development. "Somehow these seafaring mammals have found a way to cope with sleep deprivation,...

Molecular thermometers on skin cells detect heat and camphor

...TRPV3 suggested the protein might be communicating temperature to the brain, its distribution raised some doubts. Despite expectations that temperature sensors be present in sensory neurons innervating the skin, TRPV3 protein was found in actual skin c...

Distributed Basic Local Alignment Search Toolkit (W.ND-BLAST)

...cted by amoeba that are resistant to chlorination, temperature and osmotic pressure. The amoeba acts as a "Trojan Horse" harboring and transporting the microbes. Amoebas with waterborne resistant microorganisms have been recovered from drinking water, cooling towers and water distribution networks in hospitals. ...

New strategies to reduce hospital-aquired infections

...cted by amoeba that are resistant to chlorination, temperature and osmotic pressure. The amoeba acts as a "Trojan Horse" harboring and transporting the microbes. Amoebas with waterborne resistant microorganisms have been recovered from drinking water, cooling towers and water distribution networks in hospitals. ...

Currents could disrupt ocean food chain

...om Greenland and measured isotopes that show rapid temperature changes, which coincide with changes in ocean nutrient concentrations measured in deep-sea sediment cores. "One full oscillation of these switches took 1,500 years," Schmittner said, "but the individual transitions happened surprisingly fast. The cl...

Stealth Worms May Improve Insect Pest Control

...nalysis. The researchers determine the nematode's temperature and moisture requirements, the insect hosts it colonizes and other characteristics. Lists of EPN evolutionary associations, called phylogenies, are assembled to show how the nematodes have evolved in relation to each other and how they are related in...

Scripps scientists find potential for catastrophic shifts in Pacific ecosystems

...eristics of the North Pacific, such as sea surface temperature (which were suspected to show regimes), are not no...s dramatically due to, for example, an increase in temperature from global warming, it will not recover its previous condition simply through an equal but opposite...

Activation of thermoreceptors mediates raw garlic's burning pungency

...kable family of receptors that can be activated by temperature and chemicals. Some TRP channels, including TRPA1 and TRPV1, respond to both temperature and chemical compounds: TRPV1 is known to respond to noxious (painful) heat and to the pungent compo...

Elephant seal pups suffer from ocean warming

... Elephant seals are shown to be sensitive to ocean temperature changes associated with both long-term 25-year cyc... the ocean are known to be very sensitive to water temperature changes, as an increase in water temperature usually causes their prey to migrate to cooler areas, d...

Africa to take it on chin again with climate change

...-gas warming effect." Since 1990, the sea-surface temperature pattern has reversed, warming more rapidly in the North Atlantic than in the South. The models examined by Hurrell and Hoerling show this trend intensifying in future decades. They project that the Sahel monsoon will be some 20% to 30% wetter by 2049...

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