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How To Use Isotopic In A Sentence

  • Combining the isotopic dilution (ID) method with the on-line fractionation correction method, the rhenium content can be determined accurately at sub-nanogram level using the normal solution n.
  • Deformation modes involving hydrogen also drop dramatically in frequency on isotopic substitution.
  • Since the geology on the territory is not too complex and dominated by a few major rock types of very different origin (oceanic basalts, limestone, continental volcanics), this will be useful to define possible end member compositions and point sources in the local production lines, as, on geochemical-petrological grounds, the main rock types will have distinct but characteristic isotopic compositions. Interactive Dig Sagalassos - Isotope Archaeology Survey Report 1
  • Stable isotopic method can be used effectively in the diagenetic research of deep water carbonate rocks.
  • At the saeter no strong isotopic effect was expected and none was found. Archaeological study on Greenlandic Norse
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  • The critiques of Jaworowski on the shift were addressed by Hans Oeschger 1995, who pointed out that the ice core record shift was done in accordance with theoretical estimates of the rate of diffusion in gases in firn, and that these theoretical estimates were confirmed by isotopic enrichment in line with theory. Archive 2010-03-01
  • Later days DNA has in bacteria and archaebacteria bottlenecked through 70 Celsius, which is roughly the temperature the sediment chert isotopic ratios gives for most of Earth Archaean history. Astronomers Find Super-Earth With An Atmosphere | Universe Today
  • Healthy elderly volunteers were infused with normal saline either intravenously or subcutaneously, using radioisotopic triated water and technetium pertechnetate.
  • Only the most robust biominerals survive into the fossil record, and the range of isotopic systems available to study is limited.
  • By examining the volatile content of meteoritic contaminants in the lunar regolith and of volatiles cold-trapped at the lunar poles, we can determine their chemical and isotopic composition and possible source regions.
  • The combined isotopic data suggest derivation of the sediments from at least three distinct crustal source regions.
  • Comparable Pliocene palaeoclimatic fluctuations can also be seen in Southern Ocean silicoplankton records and marine isotopic records, and in seismic reconstructions of Antarctic glacial stratigraphy.
  • It has been demonstrated in the laboratory that isotopically pure Si - 28 has 60 per cent better room temperature thermal conductivity than natural silicon with its three isotopes.
  • To date, this is the best estimate for the duration of the Emsian stage because it was interpolated between two methodically consistent and biostratigraphically well-bracketed isotopic ages.
  • Glycine and valine exhibited isotopic values outside the range of our sampled end members.
  • Efficient organic carbon burial sustained over tens of millions of years, required by the high carbon isotopic compositions of preglacial carbonate, may lead to the buildup of enormous quantities of methane, presumably in hydrate reservoirs. RMS and Sulphate Emissions « Climate Audit
  • For example, the origin of ivory can be identified by its strontium isotopic composition, which reflects the diet of the elephant.
  • Other examples of relative isotopic dating are the deuterium variations in ice cores and the osmium isotope record of marine sediments.
  • In these cases, associated fluids could have modified the original isotopic signature, in particular when anhydrite was altered to secondary gypsum by surface waters.
  • The isotopic data do not conform to a simple mixing equation.
  • The slow differentiation model for the Earth is now largely abandoned in the light of evidence from planetary exploration, dynamic simulations of nebular formation, and isotopic geochemistry of mantle, meteorite, and lunar samples.
  • As diagenetic growth of authigenic apatite continues within a bone, the isotopic composition of the whole bone will trend towards a purely diagenetic signal.
  • Results of isotopic measurements of below - ground, lacunal and emitted methane indicate that methane is transported from rice predominantly via molecular diffusion with a small component due to transpiration induced bulk flow.
  • The Pb, S isotopic study shows that the mass migration and the fractional distillation of Pb isotope took place in the whole rock and in the cement.
  • This isotopic shift is supported by the presence of Musgrave-derived boulders within the tillites that are associated with the rhythmites.
  • Isotopic fingerprinting can also make an important contribution towards information about modern as well as ancient trade.
  • In the western Palearctic, the king eider has been delineated into two broadly distributed breeding populations in North America, in the western and eastern Arctic, on the basis of banding (ringing) data [50] and of isotopic signatures of their diet while on wintering grounds [51]. Effects of climate change on the biodiversity of the Arctic
  • Measuring the isotopic ratios on Mars will provide clues about possible biological activity.
  • The trace element and isotopic characteristics of these dykes imply derivation from an asthenospheric mantle source, which is likely to occur only as a result of regional lithospheric extension.
  • For example, the origin of ivory can be identified by its strontium isotopic composition, which reflects the diet of the elephant.
  • To exclude the possibility of phaeochromocytoma, case 1 underwent computed tomography and cases 3 and 4 underwent isotopic imaging.
  • Detailed elemental and isotopic studies of this crystal fractionation pathway have indicated the importance of mafic phases, notably calcic clinopyroxene and biotite.
  • Some structural, petrological and isotopic evidence suggests multi-stage and possibly polycyclic metamorphic evolution of the granulites of the Eastern Ghats belt.
  • To understand isotopic variation in Florida sirenians, we selected four teeth for serial sampling.
  • The trace element and isotopic characteristics of these dykes imply derivation from an asthenospheric mantle source, which is likely to occur only as a result of regional lithospheric extension.
  • Partial melting models, isotopic studies and the petrology of entrained ultramafic xenoliths suggest that many basanitic magmas are sourced in the asthenosphere.
  • Remarkably, when these carbon isotopes are traced back in geologic history, the average carbon isotopic composition of seawater and of most of the kerogen was similar to today.
  • The trainees will have an opportunity to learn these techniques, which include spectrophotometric, fluorescent, and radioisotopic enzyme assays and metabolic flux measurement using isotopic tracers. Laboratory Rotation
  • Trace element data and isotopic analysis demonstrate that the arc is composed of islandarc tholeiite and ocean-island basalts and calc-alkaline arc-type extrusive rocks.
  • The team used isotopic analysis to examine the chemical composition of the glycine. Times, Sunday Times
  • Finally, a U-Pb isotopic study of zircon and monazite from khondalite and sapphirine granulite was undertaken as a more reliable method for dating the metamorphic event.
  • Noble gas isotopic geochemistry is a useful tool for studying on mantle degassing and evolution of the Earth′s atmosphere.
  • With the potentiometric method, no CA activity could be measured, whereas with the isotopic disequilibrium technique, significant CA activity could be detected.
  • He showed that the glacial-interglacial range of isotopic values in the shells were very similar. Times, Sunday Times
  • The observed correlations are perhaps most simply attributed to mixing between components with differing isotopic composition and elemental abundances.
  • This supernatant was used for measurement of isotopic enrichment of free leucine.
  • For example, the origin of ivory can be identified by its strontium isotopic composition, which reflects the diet of the elephant.
  • The isotopic composition of condensed fumarolic steam is consistent with these temperatures and implies that the source water is derived primarily from either lowland meteoric waters or fossil Red Sea water, or both. Geothermics Abstract
  • Although their ages are correlative with the Parana Volcanic Province magmatism, the geochemistry, petrology and isotopic compositions of the Salta Rift magmas show different source regions and petrogenetic processes.
  • Figure 7D, the extent of isotopic labeling in the sphingosine and fatty-acyl groups of ceramide molecules was analyzed, where f1 denotes fatty acids incorporated into the sphingosine group, while f2 and f3 denote fatty acids incorporated into the fatty-acyl groups of hepatic c16 ceramide and muscular c18 ceramide, respectively. PLoS ONE Alerts: New Articles
  • The plan is that these will determine the abundance and stable isotopic compositions of elements such as hydrogen, carbon, nitrogen and oxygen.
  • The instrument was externally calibrated using the monoisotopic masses of tryptic and chymotryptic peptides from bovine serum albumin. PLoS ONE Alerts: New Articles
  • Plutonium is graded by its isotopic composition.
  • To compare the deuterium contents of the different peptides, an averaged mass was obtained by centroiding the envelope of isotopic peaks.
  • The development of isotopic tracers during the war was a by-product of the preparation of radioactive and stable isotopes in connection with work on the atomic bomb.
  • Most major extinction events are associated with pronounced isotopic excursions.
  • By correction of isotopic standards , the absolute measurement method of MC - ICPMS was established.
  • It then addresses the processes and geochemical conditions at the time of deposition that controlled the observed isotopic signal.
  • Both isotopes act the same in most chemical reactions, but reactions in the atmosphere in which sulfur dioxide gas molecules are split by ultraviolet light (UV) rays cause the isotopes to be sorted or "fractionated" into different reaction products, creating isotopic anomalies. Innovations-report
  • Development of geochronology from isotopic chronology to tectonic chronology must evolve several stages including ther- mal chronology, tectono-thermochronology and deformation chronology.
  • The array to the far left mimics the lead isotopic compositions at 130Myr.

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