Isotopic Variation Current Events | Isotopic Variation News | 3
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Mean Population Size Increases with Diversity
A long-standing debate in ecology has been the effect of diversity on the temporal stability of biological systems. Ecological theory predicts that the stability of populations should decline as community diversity increases, in part, because population size is assumed to decline with community richness. In the February issue of Ecology Letters,... view more... (2003-01-28)
Gene study shows three distinct groups of chimpanzees
The largest study to date of genetic variation among chimpanzees has found that the traditional, geography-based sorting of chimps into three populations—western, central and eastern—is underpinned by significant genetic differences, two to three times greater than the variation between the most different human populations. view more (2007-04-23)
Cell's 'power plant' genes raise vision disorder risk
Genetic variation in the DNA of mitochondria - the "power plants" of cells - contributes to a person's risk of developing age-related macular degeneration (AMD), Vanderbilt investigators report May 7 in the journal PLoS ONE. view more (2008-05-07)
Strains of laboratory mice more varied than previously thought
A collaborative study by scientists at the University of North Carolina at Chapel Hill and The Jackson Laboratory in Bar Harbor, Maine, has found that the genetic variation in the most widely used strains of laboratory mice is vastly greater than previously thought. view more (2007-07-30)
Constant sunlight linked to summer suicide spike
Suicide rates in Greenland increase during the summer, peaking in June. Researchers writing in the open access journal BMC Psychiatry speculate that insomnia caused by incessant daylight may be to blame. view more (2009-05-08)
Early agriculture left traces in animal bones
Unraveling the origins of agriculture in different regions around the globe has been a challenge for archeologists. Now researchers writing in the Proceedings of the National Academy of Sciences report finding evidence of early human experiments with grain cultivation in East Asia. They gathered this information from an unlikely... view more... (2009-03-24)
Detecting synthetic fertilizers: Is it organic or not?
As organic farming becomes more common, methods to identify fraud in the industry are increasingly important. In a recent study in Journal of Environmental Quality, scientists successfully use nitrogen isotopic discrimination to determine if non-organic, synthetic fertilizers were used on sweet pepper plants. view more (2008-02-04)
New map of variation in maize genetics holds promise for developing new varieties
A new study of maize has identified thousands of diverse genes in genetically inaccessible portions of the genome. New techniques may allow breeders and researchers to use this genetic variation to identify desirable traits and create new varieties that were not easily possible before. view more (2009-11-20)
New study replicates association between genetic variation and antidepressant treatment response
Pharmacogenetics, the study of genetic variation that influences an individual's response to drugs, is an important and growing focus in all of medical research, including psychiatry. view more (2008-07-16)
New finding in studying dopamine transporter
Confirming findings in a previous study, Yale researchers observed an altered availability of the dopamine transporter in healthy persons with a genetic variation linked to substance abuse and attention deficit hyperactivity disorder (ADHD). view more (2005-06-07)
Diamonds Are Forever Revealing New Insights into Earth's Development
Diamonds will take center stage this month in countless wedding ceremonies and other celebrations. In addition to their usual role as symbols of enduring love and fidelity, diamonds are now also helping geologists unravel clues about how the earth's precious metal mineralization was formed and why diamonds and some of these metals are found in... view more... (2008-06-13)
Immune genes adapt to parasites
Thank parasites for making some of our immune proteins into the inflammatory defenders they are today. view more (2009-05-26)
Genetic and environmental influences on alcohol consumption among rhesus monkeys
There is little doubt that alcohol-related disorders in humans are genetically based. The influence of environmental factors, however, remains unclear. view more (2006-02-23)
Gene variants may determine lung function and susceptibility to maternal smoking
A tiny variation within a single gene can determine not only how quickly and well lungs grow and function in children and adolescents, but how susceptible those children will be to exposure to second-hand tobacco smoke, even in utero, according to researchers from the University of Southern California. view more (2009-03-26)
Solexa Announces Progress in its Single Molecule Array Technology at BioArrays Europe Conference
Speaking at BioArrays Europe (Cambridge, UK, 30 Sept-1 Oct), Dr Tony Smith, Chief Technology Officer (CTO) of Solexa, presented data on the progress of the Company`s proprietary Single Molecule Array™ technology for human genetic variation applications, highlighting significant progress in the massively parallel detection of single molecules... view more... (2002-10-01)
New Keys to Keeping a Diverse Planet
Variation in plants and animals gives us a rich and robust assemblage of foods, medicines, industrial materials and recreation activities. But human activities are eliminating biological diversity at an unprecedented rate. view more (2007-09-27)
Explosive growth of life on Earth fueled by early greening of planet
Earth's 4.5-billion-year history is filled with several turning points when temperatures changed dramatically, asteroids bombarded the planet and life forms came and disappeared. view more (2009-07-09)
Johns Hopkins to participate in 1000 Genomes Project
Researchers at the McKusick-Nathans Institute of Genetic Medicine (IGM) at Johns Hopkins will join other national and international scientists in the 1000 Genomes Project, an ambitious effort that will involve sequencing the genomes of numerous people from around the world to create the most detailed and medically useful picture to date of human... view more... (2008-01-22)
The importance of gene regulation for common human disease
A new study published in Nature Genetics on Sunday 16 September 2007 show that common, complex diseases are more likely to be due to genetic variation in regions that control activity of genes, rather than in the regions that specify the protein code. view more (2007-09-17)
Copy number variation may stem from replication misstep
Genome rearrangements, resulting in variations in the numbers of copies of genes, occur when the cellular process that copies DNA during cell division stalls and then switches to a different genetic "template," said researchers at Baylor College of Medicine in Houston in a report that appears today in the journal Cell. view more (2007-12-28)
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