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Tag: "ice" at biology news

Microfossils unravel climate history of tropical Africa

...ntly during the past 25,000 years. During the last ice age, temperatures over tropical Africa were 21°C, ...e African continent. This occurred during the last ice age and, as a consequence, the land climate in tropical Africa was drier than it is in today's world...

Satellites shed light on global warming

... climate. Because any increase in the melt rate of ice sheets and glaciers has the potential to greatly i...e Celsius a decade and are having an impact on the ice shelves and glaciers. Innsbruck University's Professor Helmut Rott has been observing the accelerate...

Dig deeper to find Martian life

... best place to look for living cells is within the ice at Elysium, the location of the newly discovered f... look for living cells on Mars would be within the ice at Elysium because the frozen sea is relatively recent ?it is believed to have surfaced in the last ...

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

...ole during this time, as the larvae are encased in ice for months, many insects respond to seasonal changes in day length, which regulate their development. Understanding what happens to larvae during this time may give researchers more insight into the nature and role of heat-shock proteins....

Reef warns of sea level rise

...st period of global warming before our most recent ice age," says Professor Malcolm McCulloch, deputy dir...h as variations in its tilt or wobble. During the ice ages atmospheric CO2 was around 180 parts per million, compared to 280 parts per million during inte...

Fast-freeze snapshot yields new picture of nerve-muscle junction

...rinkly appearance. While slow freezing can create ice crystals that tear cell structures apart, the high...o flash-freeze at minus-180 degrees Celsius, makes ice appear like liquid glass and devoid of destructive crystals. Cross-sections taken of synapses revea...

Finding an answer to Darwin's Dilemma

...ceans," says Dr. Narbonne. "Immediately after this ice age there is evidence for a huge increase in atmospheric oxygen to at least 15 per cent of modern levels, and these sediments also contain evidence of the oldest large animal fossils." Also on the research team are Don Canfield (University of Sout...

Siberian lakes burp 'time-bomb' greenhouse gas

... locked up in permafrost since the end of the last ice age," Walter said. "Now it is being released into the bottom of lakes, providing microbes a banquet from which they burp out methane as a byproduct of decomposition." "Permafrost models predict significant thaw of permafrost during this century, wh...

Squid-inspired design could mean better handling of underwater vehicles

...noes near Hawaii to the frigid depths beneath pack ice in the North and South poles. However, while the torpedo shape of some underwater vehicles ensures rapid deployment and high cruising speeds with minimal energy, their hydrodynamic design makes them more difficult to maneuver or dock at low speeds a...

New evidence of early horse domestication

...ted to cold winters, she said. "Horses can survive ice storms and don't need heated barns or winter fodder," Olsen said. They are, in fact, some of the last remaining large, Ice Age, Pleistocene mammals living in one of the last places on Earth where Pleistocene vegetation survives. Because they were d...

Scientists use an 'ice lolly' to find polar bacteria in their own backyard

...ntified using their DNA. The bacteria can modify ice and water in a number of ways. One of the species ...es isolated in this study promote the formation of ice crystals at temperatures close to melting, a property which is useful in the production of artificia...

Pollutant haze heats the Arctic

...sion." He notes that the thickness of Arctic sea ice "is affected by such things as how much the atmosphere blankets the surface. Sea ice is changing very rapidly in the Arctic because of surface warming. This may be one contributing fact...

Compound in dairy products targets diabetes

...ts that enrich foods such as butter, margarine and ice cream with CLA. "Adult-onset diabetes is fast becoming an epidemic and is largely associated with poor diet and nutrition and other lifestyle issues," Vanden Heuvel says. The reason for the increase in diabetes may have to do with the ratio of so...

Science captures the essence of fruit

...s flavours and fragrances in products ranging from ice cream to shampoo. "While manufacturers have largely been successful in copying natural tastes and scents, they generally do so either through a chemical synthesis process or extraction from harvested raw ingredients. "Neither approach is ideal. C...

Arctic expedition will investigate alien-like glacier

...dying a sulfur-spewing spring on the surface of an ice field not far from the North Pole this summer, after it was discovered by Institute Executive Director Dr. Benoit Beauchamp during his travels in the area. Beauchamp, U of C adjunct professor Dr. Steve Grasby from the Geological Survey of Canada, and...

Arctic coring expedition continues to yield new clues

...g of oceanic gas hydrates ?mixtures of methane and ice on the seafloor. ...

Researchers discover which organs in Antarctic fish produce antifreeze

... protect the intestinal fluid from being frozen by ice crystals that come in with seawater and food. Inte...ve the freezing point and is regularly filled with ice crystals. From the intestine, the AFGPs are, apparently, absorbed into the blood. This hypothesis i...

New egg freezing technique offers hope to hundreds of women

... storing in liquid nitrogen. This process prevents ice crystals forming, which do so much damage to the structure of the egg. Dr Kuwayama froze 111 eggs, of which 94.5% survived freeze-thawing, 90.5% were fertilised using ICSI (intra-cytoplasmic sperm injection), and 50% of the resulting zygotes were suc...

Slow-frozen people? Latest research supports possibility of cyropreservation

...uld be cyropreserved without formation of damaging ice crystals, according to University of Helsinki rese...ring wider use of cyropreservation is formation of ice crystals, which damage cell structures. Cyropreservation may be most familiar, however, as the cont...

Evolutionary scrap-heap challenge: Antifreeze fish make sense out of junk DNA

...pecial antifreeze proteins that work by binding to ice crystals to prevent the crystals growing larger and causing problems. Most of these antifreeze proteins evolve by natural selection from existing proteins when the DNA coding for them duplicates itself and changes over time to give new functions. How...

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