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Tag: "temperature" at biology news

Huddling and a drop in metabolism allow penguins to survive the South Pole cold

...und that huddling penguins maintain a lower rectal temperature than birds which were isolated from the colony (35...y). However, a sustained drop in deep body (core) temperature would be in direct conflict with the requirements for successful egg incubation. Therefore, energy s...

A potential biological cause for sudden infant death syndrome

...blood pressure, sensitivity to carbon dioxide, and temperature during waking and sleep. When babies sleep face-down or have their faces covered by bedding, they are thought to re-breathe exhaled carbon dioxide, therefore breathing in less oxygen. Normally, the rise in carbon dioxide activates nerve cells in the ...

ASU researchers test antibacterial effects of healing clays

...did a clay mineralogist whose background is in low temperature geochemistry become involved with a health care pr... lab in a few hours. They form when the chemistry, temperature and pressure conditions are right. In the case of the two French clays we are testing, their chemica...

NASA snow data helps maintain nation's largest, oldest bison herd

... and wind. Daily measurements of precipitation and temperature from USDA Snowpack Telemetry system are used to drive the model through time. "Bison have one of the longest migrations of any large mammal in the country. The fact that they are moving to low-elevation winter ranges outside the park is actually a...

Unique gene regulation gives chilly bugs survival advantage at bottom of the world

...al midges against environmental stresses including temperature changes as well as changes in water, oxygen and pH... the Antarctic coast, where the average summertime temperature is around 36°F (2°C). In laboratory experiments, the researchers exposed the larvae and adults to 39...

Why do cold animals make bigger babies?

...uggests large offspring are not directly linked to temperature at all. Instead, large offspring just happen to be... organisms. For many of these organisms, we expect temperature to also leave an imprint on reproduction." ...

Global changes alter the timing of plant growth, scientists say

...m now--a doubling of atmospheric carbon dioxide; a temperature rise of 2 degrees Fahrenheit; a 50 percent increase in precipitation; and increased nitrogen deposition--as a likely byproduct of fossil-fuel burning. Scientists applied each of the four experimental treatments--elevated carbon dioxide, warming, in...

Researchers link ocean organisms with increased cloud cover and potential climate change

...y untouched by pollution and has relatively steady temperature and meteorological conditions during the seasons in which phytoplankton blooms appear. "This seems to be one of those rare regions in the globe where the biology really takes over," Nenes explained. "That allows us to see strongly the impact of bio...

Origin of inherited pain disorder pinpointed

...y pain in the extremities triggered by exercise or temperature change. In contrast to PEPD, which is caused by mutations that disrupt inactivation the sodium channel, PE arises from mutations that lower its activation threshold. The researchers concluded that their findings "further emphasize the critical role...

Nature's process for nitrogen fixation caught in action

...ertilizer by a chemical process that involves high temperature and high pressure. Nature does the same thing at ambient temperature and pressure. The process, called nitrogen fixation, is essential to life as it provides nutrients t...

Ocean seep mollusks may share evolutionary history with other deep-sea creatures

...ulfide and methane. Seep fluids are about the same temperature as surrounding waters, but similar chemically challenging environments exist at hydrothermal vents, fissures in the ocean floor where water is superheated by magma lurking just below the crust. Although seep and vent fluids are a poisonous brew for ...

Carnegie Mellon scientists use 'green' approach to transform plastics manufacturing

...ut down or restarted at will, depending on how the temperature and other conditions of the reaction are varied. ATRP is an exceptionally robust way to uniformly and precisely control the chemical composition and architecture of polymers as well as the growth of every polymer chain, all while employing a broad ra...

From hot springs to rice farms, scientists reveal new insights into the secret lives of archaea

...eanographic Institution will discuss the effect of temperature and chemistry on archaeal communities inhabiting m...eme. The species Pyrolobus fumarii holds the world temperature record for surviving in waters of 113 C or 235 F, well above the boiling point. ''However, in the...

Seals protect brain, conserve oxygen by turning off shivering response on icy dives

...are physiologically programmed to shiver when body temperature drops below a certain "set-point." While breath...own the shivering response, a seal allows its body temperature to drop and achieves the benefits of hypothermia: a slower metabolism and lowered oxygen requirement...

Rising ocean temperatures, pollution have oysters in hot water

...lity rate, suggesting that the combination of high temperature and cadmium is more stressful than each of these c...t, water temperatures reached 32°C, she said. Each temperature group was subdivided into two subgroups, oysters that were exposed to cadmium and those that were no...

Climate experts search for answers in the oceans

...by helping us to better understand the sea surface temperature story." Phytoplankton, microscopic marine pla...ction, so it is important to know both sea-surface temperature and ocean colour." In order to make the most of all satellite information available on ocean col...

New engineered drug may offer prolonged arthritis relief

...that clump at temperatures higher than normal body temperature for treating cancers. ELPs aren't recognized by the body's immune system as foreign substances, and thus they have some unique advantages for biomedical applications, according to the researchers. Also, ELPs can be joined directly to genes that con...

Extreme environment changes fish appearance

... "Restricting food availability and raising the temperature just a few degrees shifts morphology dramatically," Lema said. The findings have implications for conserving species, Lema said. On one hand, the fish may be more adaptable to changing conditions than thought. But refuge-bred fish might well di...

Worms produce surprise insight into human fever

...1 (HSF-1) pathway, which is elicited by increased temperature independently of p38 MAPK/CED-3. Aballay identifi...ats (and people) can increase their internal body temperature in response to infection, yet even cold-blooded “poikilotherms?like worms migrate toward warmer en...

'Fruit fly dating game' provides clues to our reproductive prowess

.... "This greenhouse warming is well documented. The temperature rise was rapid, over about 20,000 years, and it stayed warm for about100,000 years, then cooled back to normal well before the mass extinction." Marine species at the time suffered from the heat. Most adapted to the stress conditions by dwarfing, g...

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