Isotopic Variation Current Events | Isotopic Variation News
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Nickel isotope may be methane producing microbe biomarker
Nickel, an important trace nutrient for the single cell organisms that produce methane, may be a useful isotopic marker to pinpoint the past origins of these methanogenic microbes, according to Penn State and University of Bristol, UK, researchers. view more (2009-06-23)
Better measurements reveal seasonal changes in sulfur
Researchers from the University of Maryland (UMD) and the National Institute of Standards and Technology (NIST) have developed a new and improved technique for the simultaneous measurement of sulfur isotopic ratios and concentrations of atmospheric sulfate using snow samples from Greenland and Kyrgyzstan. view more (2005-10-10)
Archaeologists to establish true value of Roman silver coins
An archaeologist at the University of Liverpool is examining more than 1,000 Roman silver coins from museums around the world in order to establish their true economic value. view more (2006-03-03)
Ecosystem consequences of a single, genetically based plant trait
Climate is often touted as the most important regulator of decomposition and nutrient cycling processes in forest ecosystems, however, in the forthcoming issue of Ecology Letters, Schweitzer and her research team from Northern Arizona University and the University of Wisconsin, USA, demonstrate that plant genes can have strong effects on the... view more... (2004-02-05)
Antarctic snow inaccurate temperature archive
According to Dutch researcher Michiel Helsen, annual and seasonal temperature fluctuations are not accurately recorded in the composition of the snow of Antarctica. His research into the isotopic composition of the Antarctic snow has exposed the complexity of climate reconstructions. view more (2006-02-16)
Vaccine to cope with viral diversity in HIV
The ability of HIV-1 to develop high levels of genetic diversity and acquire mutations to escape immune pressures contributes to our difficulties in producing a vaccine. view more (2007-04-27)
New discovery: Molecular variation in one gene affects the growth of natural populations
For the first time, ecologists have been able to show that molecular variation in one gene may affect the growth of a population in its natural habitat. view more (2006-04-26)
Lavas from Hawaiian volcano contain fingerprint of planetary formation
Hikers visiting the Kilauea Iki crater in Hawaii today walk along a mostly flat surface of sparsely vegetated basalt. It looks like parking lot asphalt, but in November and December 1959, it emitted the orange glow of newly erupted lava. view more (2008-06-20)
Challenges of HIV-1 subtype diversity
A review article in the New England Journal of Medicine explores the genetic variation of HIV-1 and its implications for preventing and treating the disease. Francine McCutchan, Ph.D., a researcher with the U.S. Military HIV Research Program, co-authored the article, which appeared in the April 10, 2008 edition. view more (2008-05-22)
Age is more than a number — In barn owls, it reveals how susceptible one is to climate change
Fluctuations in weather and the environment affect survival and reproduction of animals. But are all individuals within a population equally susceptible? Theory on the evolution in age-structured populations suggests not - those life stages that are more important for overall fitness should be less susceptible to environmental variation than other... view more... (2007-01-11)
APPLYING SHEWHART'S CONTROL CHARTS TO CLINICAL GOVERNANCE (p 463)
A theory of variation used for quality control in the manufacturing industry since the 1920s could have helped in the earlier detection of recent UK health crises, suggest authors of an article in this week's issue of THE LANCET. The physicist and engineer Walter Shewhart devised a simple graphical method based on mathematical theory and practical... view more... (2001-02-07)
Eutrophication affects diversity of algae
Eutrophication of the seas may have an impact on genetic variation in algae, research at the University of Gothenburg shows. view more (2009-10-20)
Unusual meteorite unlocks treasure trove of solar system secrets
An unusual meteorite that fell on a frozen lake in Canada five years ago has led a Florida State University geochemist to a breakthrough in understanding the origin of the chemical elements that make up our solar system. view more (2005-09-28)
Variation in the same gene affects rate of parasite infection in both humans and baboons
Researchers at the Duke University Institute for Genome Sciences & Policy have found that variation in the same gene in humans and baboons produces the same kind of disease resistance. view more (2009-06-25)
Rhythmic genomics -- the yeast metronome and the walk of life
New genome sequence information from the humble baker's yeast has revealed surprising variation in a set of genes that can be thought of as nature's oldest clock. view more (2009-04-08)
Deprived areas show greatest increase in teenage pregnancies
From the 1980s to the 1990s rates of teenage pregnancy in Scotland increased more rapidly in areas of greater socioeconomic deprivation, finds a study in this week's BMJ. This finding has implications for allocating resources to achieve government targets in reducing pregnancy rates by 2010. Research carried out at Glasgow University investigated... view more... (2001-07-25)
UI Study Reveals Value of Schizophrenia-Related Gene Variation
University of Iowa researchers have learned more about a genetic variation that is a small risk factor for a mild form of schizophrenia, yet also is associated with improved overall survival. view more (2007-02-14)
The Value of Variation: Ecologists Consider the Causes and Consequences
Consider the case of the three-spine stickleback. These tiny fish that thrive in oceans and in fresh water might appear to be the same, yet ecologists are finding that they are actually a diverse collection of very specialized individuals. view more (2009-07-23)
Genetic variation increases HIV risk in Africans
A genetic variation which evolved to protect people of African descent against malaria has now been shown to increase their susceptibility to HIV infection by up to 40 per cent, according to new research. Conversely, the same variation also appears to prolong survival of those infected with HIV by approximately two years. view more (2008-07-17)
Genetic variation impacts aspirin's effectiveness in preventing colon cancer, Dartmouth study finds
Dartmouth researchers are among a team of doctors that have learned more about how people may or may not benefit from taking aspirin in the effort to curb colon cancer. view more (2006-10-25)
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