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Tag: "temperature" at biology news

Bacteria beat the heat

...ved an increase of about 10 degrees in the average temperature at which the reaction rate peaked. Scherz: "This s...ows that enzyme efficiency is tuned to the average temperature of the bacterial habitat, rather than the immediate conditions. This may protect the cells from harm...

Polymers show promise for lab-on-a-chip technology

...d to respond to specific external stimuli, such as temperature changes and UV radiation exposure, which could makes them easier to activate than silicon. And, perhaps most importantly of all, LCPs are less expensive than silicon and potentially easier to process, Elias said. "Ultimately, we believe liquid crys...

Scientists find Antarctic ozone hole to recover later than expected

...ing Instrument (OMI) aboard NASA's Aura satellite, temperature information from NOAA's polar orbiting series satellites, and data captured by NOAA ground stations and weather balloons to create the new prediction model. ...

Novel connection found between biological clock and cancer

...ties, shortening the circadian period and altering temperature compensation. For this study, the researchers cloned the gene based on its position in the genome, and found it was an important cell cycle regulator. When they eliminated the gene from the genome, the clock was normal, indicating that the mutation i...

Taking evolution's temperature: Researchers pinpoint the energy it takes to make a species

...serving changes in a unicellular animal whose body temperature varies according to its surroundings, as opposed to a mammal, which regulates a constant body temperature, scientists could more precisely measure rates of speciation caused by the environment. In the end, it is individual metabolic rate - how fast a...

Fish on acid: Hagfish cope with high levels of CO2

.... Just as cold-blooded animals have an equal body temperature to their surrounding environment, the Hagfish has the same concentration of salt in its blood as the surrounding seawater. This trait previously led scientists to believe that these fish (known as osmoconformers) could only poorly regulate their pH. ...

Secrets of the sea yield stronger artificial bone

...emely weak. But nature mixes them together at room temperature and without toxic chemical to create something that is very tough -- this fascinates us." ...

New organic substrate

...f the pine is subjected to a washing in water at a temperature of 90-115 ºC, the resulting cellulose being practically pure, free of phytotoxic products and ready to be used in the growing of agricultural crops. ...

Unraveling the viral mechanism

...electron microscopes operated at very low specimen temperature and very high energy that Chiu and others use in their work that looks at different biological nano-machineries at the nanoscale. In fact, Dr. Wen Jiang, previously trained in the BCM Graduate School for Biomedical Sciences' Graduate Program in Stru...

Contaminants linked to sturgeon decline in Columbia river

...ed to the presence of dams, which have changed the temperature and flow of the river. And despite fish ladders in place for salmon, the bottom-dwelling white sturgeon rarely navigate dams successfully making it difficult for them to expand their habitat or access oceanic food sources. Schreck and Feist studied ...

Uncovering sex-change secrets of black sea bass

...come males if raised at constant temperatures. But temperature is hardly the only factor involved. Sex ratios and...ing his experiments to clarify the role that water temperature plays and to further understand what factors determine the initial sex of captive-born fish. He's al...

Molecular mechanism may explain how fevers spark seizures

... were exposed to high temperatures. She raised the temperature of cells expressing the mutant receptors to 40 deg...currently studying where the receptors go when the temperature is raised -- are they taken inside the cell more quickly, are they degraded, is their forward insert...

Some like it hot: Worms at deep-sea vents favor a fiery 45-55°C

...ecial high-pressure seawater aquarium with a sharp temperature gradient, these worms chose to remain at roughly 5...ter is barely above freezing, a steep and variable temperature gradient exists around the thermal vents, making it difficult to measure precisely the deep-sea temp...

Novel method reveals how menthol discovery could point towards new or improved pain therapies

...drugs and proteins. "Because our ability to sense temperature is closely linked to our ability to sense pain, it is not surprising that the misregulation of temperature-activated ion channels can result in chronic pain syndromes," said Ardem Patapoutian, associate professor at Scripps Research and member of GNF...

Medieval diaries aid scientists ascertain increase in hot spots due to global warming

The temperature of the northern hemisphere has increased over a la... East Anglia, analyzed thermometer measurements of temperature from 1856 onwards to establish the spatial extent of recent warming, and compared it with evidence f...

Parts of the Caribbean and Central America are likely to have less summer rain

...t of precipitation to a low amount. The bigger the temperature rise, the larger the change in precipitation." Ne... "Precipitation change is much more difficult than temperature change to detect, and requires great precision; the models do not all agree, but the majority of the...

Deep-rooted plants have much greater impact on climate than experts thought

...eviously observed but unexplained dip in Amazonian temperature during the dry season. "Evapotranspiration stays ...ion by trees in June and July explains the drop in temperature in the Amazon." This effect changes the way the atmosphere heats and cools, and will change the way...

Australian first to save sight

...cilities, LCDS can now store corneas at human body temperature levels (34C) for up to a whole month. Previously, corneas were held at low temperatures and had to be transplanted within one week of the donation. Dr Graeme Pollock, Director of the Lions Corneal Donation Service, said no other corneal donation fac...

Sea coral's trick helps scientists tag proteins

...demonstrated that it can switch shades at the body temperature of birds and mammals, which are popular research models. Its usefulness is further enhanced by the fact that it stays red for long-term protein tracking, Sergey Lukyanov explained. Dendra is the latest addition to the growing family of photoactivata...

Study finds evolution doesn't always favor bigger animals

...idonamicus -- increased only when the global ocean temperature cooled. When temperatures remained stable, not muc... "These data show a very nice correlation between temperature and body size," said Kaustuv Roy, a professor of biology at UCSD and a coauthor of the paper. "Alt...

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