Tag: "temperature" at biology news

Enzyme delivered in smaller package protects cells from radiation damage

...re plated in a growth medium and incubated at body temperature for 7 days at which time colonies of greater than 50 cells were counted. The MnSOD transfected cells were significantly more resistant to ionizing radiation than the non-tranfected cells. However, there was no significant difference in survival b...

Hormone helps mice 'hibernate,' survive starvation

...induces a hibernation-like state of decreased body temperature and physical activity, all geared to promote survival. “This hormone changes the metabolism and behavior of mice in the face of inadequate nutrition,” said Dr. Steven Kliewer, professor of molecular biology and pharmacology at UT Southwestern and ...

Dirty snow may warm Arctic as much as greenhouse gases

...gues calculated that dirty snow caused the Earth’s temperature to rise .1 to .15 degree, or up to 19 percent of t...nergy, are primarily responsible for the remaining temperature increase and are considered the Earth’s most important overall climate changing mechanism. Other hum...

Studies to find better ways to preserve human eggs, ovarian tissue under way

...e added before taking tissue from the refrigerator temperature of 4 degrees Celsius to minus 80 degrees Celsius o...t it in a control-rate freezer that takes down the temperature one degree centigrade per minute so it drops the temperature very, very slowly,” says Dr. Song. ...

Children of smokers have more than 5 times higher levels of a nicotine toxin

...get rid of it. Sleeping with parents and lower temperature rooms were also associated with increased amounts of cotinine. Cotinine was measured in 100 urine samples taken from infants aged 12 weeks. Seventy one of the babies had at least one parent that smoked and the parents of the other 33 were non-sm...

Focused ultrasound relieves fibroid symptoms in women

...e and treat the targeted fibroids while monitoring temperature changes in tissue. Ninety-six patients were treated under the original study protocol (A), and 64 patients were treated under an optimized protocol (B). Protocol A allowed a maximum treatment time of 120 minutes and a maximum fibroid treatment v...

For many insects, winter survival is in the genes

... proteins that are turned on almost as soon as the temperature dips. Until this new study, researchers knew of on...hese very same stress proteins during times of low temperature as well as during exposure to high levels of toxic chemicals, dehydration and even desiccation," Den...

Detecting cold, feeling pain: Study reveals why menthol feels fresh

...ne of the key mechanisms by which the body detects temperature sensation. But in so doing it also illuminates a m...ing how sensory receptors work, how thresholds for temperature are determined, we gain insight into how these thresholds change in the setting of injury, such as i...

Hearts of male and female rainbow trout are different

...electrically-stimulated at physiological rates and temperature in tissue baths containing buffer, with (a) glucose and (b) glucose + DCA (dichloroacetate, an activator of PDH and a therapeutic drug used to treat human heart disease and cancer), or (c) glucose + NaCN under oxygenated and hypoxic conditions. T...

Scripps research team sheds light on long-sought cold sensation gene

...on that a single gene is responsible for most cool temperature sensation," says team leader Ardem Patapoutian, wh...ld stimuli. When placed in compartments with a temperature gradient, or in an enclosure where they could choose between two temperatures, mice without TRPM8 sh...

Scientists identify prion's infectious secret

...genic fungi element was activated. In other words, temperature alone could dictate which yeast species the prion could infect. Additionally, the prion’s behavior could be altered by subtle alterations in the recognition element’s amino acid sequence. While this prion is a laboratory construct not found in na...

Sleepless for science: Flies show link between sleep, immune system in Stanford study

...ies could be kept under exactly the same light and temperature conditions as the normal flies. They looked at flies that were defective in one of two genes, called "timeless" and "period". They found that the loss of either gene's function made the flies more sensitive to bacterial infections and these sick f...

Research says boiling broccoli ruins its anti-cancer properties

.... Domestic storage of the vegetables at ambient temperature and in a domestic refrigerator showed no significant difference with only minor loss of glucosinolate levels over 7 days. However the researchers found that storage of fresh vegetables at much lower temperatures such as ?5 °C (much higher than fo...

MIT's ocean model captures diversity of underwater forests

... in their size, and in their sensitivity to light, temperature and nutrient availability, then allows the ocean to self-select those most fit for survival in any particular area. What emerged after the model completed its 10-year virtual evolution -which took four to five days on a cluster of parallel compute...

Corals that can fight global warming may one day help fragile reefs

While humans can survive large temperature fluctuations, such species as corals are only comfortable within a 12-degree temperature range. And rising global temperatures appear to be threatening their survival, according to Drew Har...

How appetite-stimulating brain cells work overtime during fasting

...s very similar to the one that regulates core body temperature in peripheral body tissues, Diano added. Thyroi..., triiodothyronine (T3), in the regulation of body temperature by heat-generating brown fat. The molecular underpinning of heat production, or thermogenesis, in...

How trees manage water in arid environments

...havior of the trees is significantly influenced by temperature changes: the trees are largely dormant in winter and have a summer growing season. The mountain-top forest that she studied was in some ways the opposite. __IMAGE_3 "During the summer season before the heavy rains, when almost all the winter pre...

When your brain talks, your muscles don't always listen

... site of injury," Knight said, "so their core body temperature can reach dangerous levels." In graduate school, he decided to pursue motor control research, and he's never looked back. "My early interests were based on sport, but my career in this field now allows me to address a much larger population tha...

UTSA researchers examine effects of global warming on Antarctic

...eabirds; biological activity in the sea water; and temperature and salinity measurements into the ocean depths. Now with one trip to the Antarctic under their belt, Xie and Cicek are enlisting the help of world-renowned sea ice expert Stephen Ackley to assist in the analysis of the data in UTSA's Laboratory...

How fish species suffer as a result of warmer waters

...elop a deeper understanding of the effect of water temperature on the biology of organisms under question. A new ...vestigated the relationship between seasonal water temperature and population density using eelpout (Zoarces viviparus), a fish species from the Southern North Sea...

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