temperature 2 7

Tag: "temperature" at biology news

Islands in the Genome Promote Speciation

...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...

Oil spills and climate change double the mortality rate of British seabirds

...a large scale climatic phenomenon affecting winds, temperature and rainfall) for the past 30 years, has had a negative effect on the guillemot population of Skomer Island. Professor Tim Birkhead of the University of Sheffield said: "Prior to our investigation of the guillemot population of Skomer Island, the i...

War on terror meets war on cancer

...ys. The researchers grew E. coli bacteria at body temperature in flasks containing a nutrient-rich liquid culture medium. There were four sets of flasks, each holding a growth medium containing water with a different ratio of oxygen-18 to oxygen-16. After the bacteria grew for three hours, the contents of each...

Student scientists create living bacterial photographs

...lington--onto the dish of bacteria growing at body temperature in an incubator. After about 12-15 hours of exposure (the time it takes for a bacterial population to grow and fill the Petri dish), the light projector is removed. What's left is a living photograph. Bacteria in the lighted regions of the Petri ...

New antifreeze protein found in fleas may allow longer storage of transplant organs

...htly warmer," says Dr. Graham. "If we can drop the temperature at which the organ is safely stored, there will be a longer preservation period." The hyperactive antifreeze protein produced by snow fleas is different from two other insect proteins discovered earlier at Queen's, the researchers say. "Unlike th...

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

...ratures 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 it would take thousands of years," Horvat said. "It's re...

Techniques available to detect soil that inhibits destructive soybean pest

...iability of plants and soil richness, moisture and temperature can affect how active and numerous soybean cyst nematodes are in particular fields. "A key find was that a small amount of suppressive soil or a cyst from a suppressive soil can lower nematode numbers," Westphal said. "We promote conditions in soil ...

DDT-resistant insects have additional genetic advantage that helps resistance spread

...phila melanogaster) in state-of-the-art controlled temperature rooms provided by the Wolfson Trust, Caroline McCart, a PhD student in the Department of Biology and Biochemistry at the University, went to great lengths to make sure that DDT resistant and susceptible strains differed only by the resistance gene it...

Women feel more pain than men, research shows

...ng the hand into an ice water bath maintained at a temperature of 1 - 2 degrees centigrade. The cold pressor tank allows researchers to monitor the pain threshold (the point at which volunteers first notice the pain) and pain tolerance (the point at which volunteers can no longer stand the pain). An upper time ...

Scientists use gene transfer technology and common virus to block neuropathic pain

...d by damage to sensory neurons that transmit pain, temperature and touch signals to and from the brain. Now, scientists at the VA Ann Arbor Healthcare System and the University of Michigan Medical School have developed a way to block the signals responsible for neuropathic pain. The secret to their success is b...

Tropical Deforestation affects rainfall in the U.S. and around the globe

...lt in a reduction in precipitation and increase in temperature in the Amazon basin, but carry no detectable impact on the global water cycle. "Our study carried somewhat surprising results, showing that although the major impact of deforestation on precipitation is found in and near the deforested regions, it a...

Mosquitoes are more attracted to individuals infected with malaria

...unding factors. Sweat, breath odour, and high body temperature all increase mosquitoes¡¦ blood lust, and no previous study had been able to isolate the effect of just the parasite. To measure how attracted the mosquitoes were to the participants, the researchers set up a chamber of uninfected female mosquitoes s...

Errors in the measurement of global warming corrected

...urnal Science, says that direct heat of the sun on temperature probes of the weather balloon (radiosonde) probabl...face are rising. For the last 40 years radiosonde temperature information has been collected twice each day from stations around the world at local times that cor...

Scientists use gene transfer technology and common virus to block neuropathic pain in animals

...d by damage to sensory neurons that transmit pain, temperature and touch signals to and from the brain. Now, scientists at the VA Ann Arbor Healthcare System and the University of Michigan Medical School have developed a way to block the signals responsible for neuropathic pain. The secret to their success is b...

Global warming increases oyster sensitivity to pollution

... Oysters are cold-blooded organisms so their body temperature changes with environmental temperature. Lannig obs... become significantly more sensitive to cadmium as temperature rises, so that cadmium levels which were not damaging to mitochondria at lower temperature become st...

A Father’s Day Gift: Free DNA Paternity Testing

... deep that live in extreme conditions of pressure, temperature and toxicity is drawing enormous interest from scientists and companies bioprospecting for possible pharmaceutical or industrial applications. Already several valuable products have been created and there is growing recognition of the potential of de...

Clear rules needed to govern deep sea bioprospecting: UNU

... deep that live in extreme conditions of pressure, temperature and toxicity is drawing enormous interest from scientists and companies bioprospecting for possible pharmaceutical or industrial applications. Already several valuable products have been created and there is growing recognition of the potential of de...

Aloe vera coating may prolong freshness, safety of fruits and vegetables

...vera gel and stored them for five weeks under low temperature while exposing a group of untreated table grapes to the same conditions. The colorless Aloe gel used in this study was developed through a special processing technique that maximized the amount of active compounds in the gel, Valero and associates sa...

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

...to an increase in cloud cover. The observed summer temperature increases are likely related to a global warming trend that has led to a longer snow-free season and an increase in the extent of woody vegetation. Both of these changes increase the amount of solar radiation that goes into heating rather than being...

Envisat and ERS-2 reveal hidden side of Hurricane Rita

...tional Envisat instruments can be used to take the temperature of the warm ocean waters that power storms during the annual Atlantic hurricane season, along with sea height anomalies related to warm upper ocean features. ...

1 2 3 4 5 6 7 8 9