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Isotopes, The Atomic Clues Used To Solve Crimes, Date Ancient Artifacts And Identify Chemicals
Whether it"s the summer grass that tickles your feet or the red Bordeaux smacking on your palette, nearly every part of the world around you carries special chemical markers. These markers, called isotopes, can tell scientists where the molecules that compose a substance are from, where they traveled, and what happened to them along the way. But doing these analyses has been complex and costly. Now, Stanford chemists have developed a new method to make isotopic analysis easier and less expensive.
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Study Finds Many Newborns Of South Asian And East Asian Descent Misclassified As Underweight At Birth
Babies of East Asian and South Asian descent are between two and three times more likely to be misclassified as underweight at birth when compared to their Canadian counterparts, according to a study led by St. Michael"s Hospital physician Dr. Joel Ray. Dr. Ray and a team of researchers, who developed the first-ever sex-specific birth weight curves for these ethnic groups, suggest the need to consider differences across ethnic groups to reduce parental stress and use of health-care res associated with labelling an infant as underweight, or "small for gestational age" at birth.
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Prevention Is The Highlight Theme Of This Year's ESC Congress
As the ESC Congress 2009 draws ever closer, the evidence in favour of a healthy lifestyle for the prevention of cardiovascular disease grows ever stronger. Prevention is the highlight theme of this year"s event, which will take place in Barcelona from 29 August to 2 September. Lifestyle factors are heavily on the agenda.
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Cohesin Jigsaw Begins To Fit

The essential chromosomal protein complex cohesin has crucial roles in sister chromatid cohesion, DNA repair and transcriptional regulation. Despite its conserved function, cohesin"s disparate association patterns in different organisms did not quite add up. New research published in the open access journal Genome Biology works towards completing the cohesin puzzle, reconciling some of these differences. Christine Schmidt, Neil Brookes and Frank Uhlmann working together at the Cancer Research UK London Research Institute, performed high-resolution analysis of cohesin binding patterns along fission yeast chromosomes. The authors" findings suggest that features thought to differentiate cohesin between organisms actually collectively define the overall behaviour of fission yeast cohesin. In fact cohesin"s mechanisms of action might be much more similar between organisms than previously thought. Earlier studies investigated cohesin"s chromosomal binding sites in different model organisms, including Drosophila and budding yeast. Despite its conserved function in DNA repair and mitosis, no common rule had emerged that defined these sites. "Our findings suggest that features that were thought to differentiate cohesin behaviour between organisms collectively define the overall behaviour of fission yeast cohesin", writes Uhlmann. "Apparent differences between organisms could reflect an emphasis on different aspects, rather than different principles, of cohesin behaviour." Cohesin complexes have a central role in cell division, mediating the association between sister chromosomes. Cohesin forms large proteinaceous rings, and is thought to bind to and holds sister chromatids together in a topological embrace. Conserved features of cohesin binding along fission yeast chromosomes Christine K Schmidt, Neil Brookes and Frank Uhlmann Genome Biology (in press) http://genomebiology.com/ Charlotte Webber BioMed Central


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