Tag: "temperature" at biology news
New technologies reveal mysteries of marine megafauna
...ed, three-dimensional maps of oceanic currents and temperature
changes that have been unattainable in the past. "...lyses show that the turtles tend to aggregate near temperature
gradients on the edges of warm water masses in the ocean. Mapping the location and depth of these ...
Bighorn sheep threatened by climate change
...ors. They also analyzed climatic variables such as temperature
and precipitation that affect the availability of ...ne," said Epps. From 1901 to 1987, the mean annual temperature
in the deserts of the southwestern United States increased by about 1.8 degrees Fahrenheit, which is...
ESA to select new Earth Explorer missions
...te measurements of areas with low humidity and low temperature
such as polar regions. ACE+ (Atmosphere and Cli...te Explorer) Accurate observations of humidity and temperature
in the troposphere and stratosphere, including their variability, are highly important in climate ch...
House dust mite project aims to reduce asthma
...ng 60 houses across the country. This will measure temperature
and humidity in bedrooms and beds, and monitor mite populations found in the beds. Harnessing building science and acarology (the study of mites and ticks), the initiative is being led by Professor Tadj Oreszczyn of UCL. He said, "we aim to identify ...
Century may bring unprecedented climate change to southern hemisphere
... minimum of one to two degrees Celsius increase in temperature
in the Andes by the end of this century," Bush said. "Our record shows that climate change of this kind has never happened in the past 48,000 years. It is not a natural phenomenon." Bush predicts that species that can migrate readily, such as birds a...
Examining cardiac performance of tunas at the cellular level
... in the different tunas, as shown by their similar temperature
sensitivities and similar values for activation energy; and Western blots revealed that increased SERCA2 protein content is associated with the higher Ca2+ uptake and ATPase activities seen in bluefin ventricles compared to albacore, yellowfin and...
Scientists report first sequencing of environmental genome
...icrobial community. For example, as the acidity or temperature
changes, how do the organisms react? How do they change their carbon or nitrogen fixation, or their scavenging of iron from the acidic groundwater? "The next step in this project is to get whole community genome arrays up and running to look at these...
Integrated animal model answers questions about environment
...ysical properties - body size, fur thickness, body temperature
and breathing rate - help determine how much energ...ch more water livestock will need when the outside temperature
is two degrees warmer. With its specificity and complexity, the model could determine parameters cr...
Findings could aid efforts to harness nature for making drugs
...er organisms typically function in water near room temperature
under ordinary pressure. The Purdue researchers demonstrated that altering the nutrients and carefully controlling fermentation time caused yeast cultures to produce an enzyme called ferulate 5-hydroxylase that has twice its normal rate of activity, ...
From neighborhoods to globe, NASA looks at land
...ed for the same day that the Houston urban surface temperature
was approximately 0.5 to 1 degree C warmer (0.9 to 1.8 degrees F) throughout the night and as much as 3 degrees C warmer (5 degrees F) around midday. Prior NASA studies have shown that built-on surfaces with few trees absorb heat and create urban hea...
OHSU-led research examines role of copper, iron in diseases
...r embryo development, connective tissue formation, temperature
control and nerve cell function, is a major focus of the project. The research team is tracking copper movement at three levels: uptake into the cell, which is mediated by a newly discovered protein called hCtrl; delivery to specific copper-dependent...
Ancient DNA mutations permitted humans to adapt to colder climates, UCI researchers find
...wo purposes: to generate heat to maintain our body temperature
and to synthesize ATP (adenosine triphosphate), a chemical form of energy that permits us to do work such as exercise, think, write, and make and repair cells and tissues. The mtDNAs are the blue prints for our mitochondrial power plants and determin...
Climate change may threaten more than one million species with extinction
...emain in its original habitat. Slight increases in temperature
can force a species to move toward its preferred, ...es. Scientists attribute the recent rise of global temperature
to human induced activities that have altered the chemical composition of the atmosphere. The buildu...
Winter weather turns on flowering gene
...w do plants know they've been exposed to the right temperature
for the right amount of time? "This is an intriguing question," says Sung. "Without a nervous system, plants must have a mechanism by which they can remember they have been through the winter season." Although plants don't have a brain like humans do...
Tiny heaters may pave way for easier tissue engineering, medical sensors
... are coated. Proteins stick to the material as its temperature
rises, and release when it goes back down. That, a...n deposited poly-N-isopropylacrylamide (pNIPAM), a temperature
sensitive polymer, onto the microheater arrays. At temperatures below about 90 degrees Fahrenheit...
AGU journal highlights - 6 January 2004
...ver the central and eastern NorthPacific. Such sea temperature
and height changes have been shownto affect the marine ecosystem and fish populations by affecting thedensity and mixing of nutrient-rich waters. Tokmakian proposes aspace-based system that can monitor the circulation patterns fromchanges in the sea ...
Endurance of plants under quartz rocks possible model for life on early Earth, Mars
...yll molecules. The algae's demonstration of high temperature
resilience presented a paradox, because chlorophyll molecules themselves normally begin to degrade at about 167 degrees, according to Schlesinger, who is a biogeochemist and ecologist. "Either they have some special kind of chlorophyll, or they were ...
OHSU team discovers compound that lacks estrogen's risks
...ch as ovulation, lactation, stress responses, body temperature
and energy balance. Key to the development of STX was the work of organic chemist Thomas Scanlan, Ph.D., a UCSF professor whose laboratory synthesized the estrogen-like compounds tested in the electrophysiological assays used by Kelly and Rnnekleiv...
Navy enlists microbes to cut costs
...xpensive but more sensitive to physical shocks and temperature
changes. Currently, butanetriol costs $30 to $40 per pound, and together the Navy and Army purchase about 15,000 pounds per year. If the costs could be reduced to $10 or $15 per pound, Indian Head estimates the services' demand could rise to 180,000 ...
New findings can help parents looking to combat number of kids' sick days
...iva samples. After collection of the first sample, temperature
of the subject was taken to ensure that cortisol contained in the second saliva sample was not affected by acute stress. SIgA in saliva was measured by radial immunodiffusion and results were expressed as a SIgA-to-Alb ratio (SIgA/Alb). Frequen...
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