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Tag: "temperatures" at biology news

Underlying cause of massive pinyon pine die-off revealed

...ange will affect the ecosystem for decades. Hotter temperatures coupled with drought are the type of event predict...n be." The drought coupled with particularly high temperatures set the trees up to be susceptible to insect infestations. Bark beetles delivered the knock-out punc...

Polymer gel can block toxic leakage problem in gene therapy

...a liquid at 39 degrees Fahrenheit to a gel at body temperatures to block most gene-bearing viruses from being diverted through the blood stream to the wrong targets, the scientists reported in research journals. "With this method we can reduce the misdirected virus dissemination by a factor of 100 to 1,000 times...

War on terror meets war on cancer

...s about prehistoric environments, such as changing temperatures over time. In recent years, Ehleringer pioneered the use of stable isotopes to study what has been dubbed "the ecology of terrorism." He has helped the Central Intelligence Agency, Federal Bureau of Investigation, Secret Service and Drug Enforcement...

New discovery: If it weren't for this enzyme, decomposing pesticide would take millennia

...hat happened to the pesticide's residue at various temperatures and then extrapolating the results to room temperature to see how long the pesticide would last if the bacteria weren't busy digesting it in the blink of an eye. "It was just amazing that this enzyme can degrade something so quickly when otherwise i...

How 'Dirt' Could Educate The Immune System And Help Treat Asthma

...ion patterns themselves, Jain said. As sea-surface temperatures increase, the density of the water decreases and thus slows the ocean thermohaline circulation, so the ocean's ability to absorb carbon dioxide also decreases. This leaves more carbon dioxide in the atmosphere, exacerbating the problem. "At the same...

NC State researchers redesign life for Mars and beyond

...grows and dwells in underwater sea volcanoes where temperatures reach more than 100 degrees Celsius, or that of bo... to extreme conditions such as drought and extreme temperatures that we have on Earth, but also to the extreme conditions that one might find on Mars." Now that th...

Climate change will affect carbon sequestration in oceans, model shows

...ion patterns themselves, Jain said. As sea-surface temperatures increase, the density of the water decreases and thus slows the ocean thermohaline circulation, so the ocean's ability to absorb carbon dioxide also decreases. This leaves more carbon dioxide in the atmosphere, exacerbating the problem. "At the same...

Costly breeding programs for endangered species pay off

...l stress. In the "post-release" breeding scenario, temperatures in incubators were altered on a 12-hour cycle based upon the high and low temperatures recorded in Houston that day. In both strategies, all breeding lines survived in captivity. In the ...

Freeze-dried mats of microbes awaken in Antarctic streambed

...ence of life in the harsh polar environment, where temperatures are below freezing for most of the year and glacial melt water flows for only five to 12 weeks annually, said Professor Diane McKnight of CU-Boulder's Institute of Arctic and Alpine Research. Such research on life in extreme environments is of high i...

Solution to 'legionella'

...gh pressure and temperatures. These pressures and temperatures have two effects: on the one hand, they eliminate the circulating bacteria and, on the other, they generate an oxidative stress that is transmitted throughout the water refrigeration system. This stress, together with the continuous loss of circulati...

Errors in the measurement of global warming corrected

...screpancy between reports showing that atmospheric temperatures have been unchanged since the 1970's, while temperatures at the Earth's surface are rising. For the last 40 years radiosonde temperature information has bee...

Disappearing arctic lakes linked to climate change

...from the latest measurements indicate that warming temperatures lead to increased numbers of surface water bodies in the colder permafrost regions. Many lakes decreased in size or dried up completely, while other lakes actually increased in size. Researchers say as the climate warms, additional meltwater accumul...

Study uncovers dirty little secret: Soil emissions are much-bigger-than-expected component of air pollution

...spike during the growing season, spurred by warmer temperatures after a cold winter, but also perhaps magnified by fertilizer use. "The soil emissions were much larger than we expected," she said. "The biggest areas were the dry topical regions like the Sahel, and in the mid-latitude regions where there is a lot...

World-first technology enables study of ancient bacteria

...ater than 1,000 atmospheres), gradually increasing temperatures (from an icy 2°C to over 100°C), great depth (several kilometres) and age (many millions of years) may contain most of the bacteria on Earth. Some of these bacteria produce methane that accumulates in "gas hydrates" ?a super concentrated methane ice...

Lands surface change on Alaska tundra creating longer, warmer summers in Arctic

...e scientists determined that the increasing summer temperatures in northern Alaska could not be attributed to regi...ositive feedback loop that could continue to raise temperatures in the region and further lengthen the snow-free period each year. Since the early 1960s, scienti...

Temperature regulates circadian clock in zebrafish

...ven embryos can tolerate a wide range of core body temperatures (being cold-blooded animals) that can be manipulated simply by changing the water temperature. Temperature variations of as little as 2 oC (35.6 oF) can reset the zebrafish clock, Lahiri et al. show, and precise shifts in temperature trigger signific...

Discovering an ecosystem beneath a collapsed Antarctic ice shelf

...pe in the Antarctic, where the near-freezing water temperatures and almost completely uncharted territory will likely provide a baseline for researchers to probe portions of the ocean floor that have been undisturbed for nearly 10,000 years. The researchers speculate, for example, that the ice shelves themselves ...

Expanding forests darken the outlook for butterflies, study shows

.... Butterflies need sunlight to elevate their body temperatures in order to fly, and forests are generally too shady for them to travel through with quickness and ease. Parnasissus also need stone crop, a plant that grows in meadows and is the only suitable host for alpine butterfly larvae. Therefore, alpine but...

Fluorescing lab worms signal longer life spans

...resced the brightest after being subjected to high temperatures as young adults had significantly longer life expectancies than those that were less bright, the team reported. "We have shown it's possible to predict the life span in an organism on the first day of adult life based on how it responds to stress," ...

Green catalyst destroys pesticides and munitions toxins, finds Carnegie Mellon University

...stroying nitrophenols because they work at ambient temperatures and neutral pH," said Collins. "Existing detoxification methods are inefficient and work only under acidic conductions. Our method can be used over a much broader pH range, including wastewater pH conditions." Fe-TAMLs already have shown promise in...

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