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  • oxygen
  • The oxygen isotope composition of human phosphatic tissues (delta18OP) has great potential for reconstructing climate and population migration, but this technique has not been applied to early human evolution. (biomedsearch.com)
  • By measuring the ratio of two isotopes of oxygen (specifically 18 O to the much more common 16 O) one can infer the air temperature at the time that the snow in each annual layer crystallized. (wattsupwiththat.com)
  • The weight of a heavy water molecule, however, is not substantially different from that of a normal water molecule, because about 89% of the molecular weight of water comes from the single oxygen atom rather than the two hydrogen atoms. (wikipedia.org)
  • When water vapor travels over the land surface, forms clouds, and precipitates as snow onto an ice sheet, the lighter oxygen isotopes are moved from the ocean into the ice sheet, leaving the ocean relatively enriched in the heavier isotopes. (waterencyclopedia.com)
  • When the sea-floor sediment cores are analyzed, large cycles in the ratio between heavy and light oxygen isotopes are found. (waterencyclopedia.com)
  • chlorine
  • Researchers from Michigan State University and the RIKEN Nishina Center in Japan discovered eight new rare isotopes of the elements phosphorus, sulfur, chlorine, argon, potassium, scandium and, most importantly, calcium. (phys.org)
  • Two of the other new isotopes of sulfur and chlorine, S-49 and Cl-52, were not predicted to exist by a number of models that paint a lower resolution picture of nuclei. (phys.org)
  • common
  • The two nuclei produced are most often of comparable but slightly different sizes, typically with a mass ratio of products of about 3 to 2, for common fissile isotopes . (wikipedia.org)
  • The presolar nature of the dust grains is revealed in the relative abundances of the isotopes of the common elements. (hawaii.edu)
  • different
  • Isotopes are different forms of elements found in nature. (phys.org)
  • Certain processes affect heavier molecules more than their lighter counterparts, leading to varying distributions of different weights across the globe. (dri.edu)
  • ones
  • Some even heavier ones might barely exist fractions of a second before disintegrating. (phys.org)
  • application
  • Timmes, F. X. and D. D. Clayton, 1996, Galactic evolution of silicon isotopes: application to presolar SiC from meteorites. (hawaii.edu)
  • early
  • Since early 2016, Argentinian isotope hydrologists have been gathering and interpreting data from two strategic regions with the help of the IAEA. (iaea.org)
  • science
  • The science behind this is called isotope hydrology - a discipline that, according to expert Solomon, "is one of the most powerful, trustworthy tools available to assess groundwater thoroughly. (iaea.org)
  • report
  • Here, we report metabolic isotope labeling to produce isotopically labeled internal standards in bacteria and yeast. (mdpi.com)