WebApr 12, 2024 · Because isotopic fractionation of hydrogen in hydrocarbons occurs during gas hydrate formation, isotopic differences between the hydrate-bound gas and dissolved gas in pore water provide data for use in evaluating whether the current gas in the pore water is a contributor to the hydrate-bound gas, e.g., isotopic differences should be … WebAccording to this model, isotopic disequilibrium arises from rate dependent inorganic hydration and hydroxylation reactions during calcification. Because calcification rate is …
Aerobic biodegradation of chlorinated hydrocarbons - Isotope Fractionation
WebJan 1, 1995 · The E"C of the pure COZ gas (-36.45 ± 0.02%o) The isotopic fractionation between C species and COz gas and the solid NaHC03 (-22.04 ± 0.03%0) and Na2C0, (-1.84 is a function of temperature (Vogel et al., 1970; Mook et al., ! 0.04%0) was measured previously. In all three experiments, the 1974). WebMay 1, 1974 · The fractionation of the stable carbon isotopes between gaseous CO 2 and dissolved bicarbonate has been measured from 5 to 25°C by a method of high precision. Additional measurements of lower precision were made up to 125°C. The results are well represented by the relation:ε b (g) = −(9.483 ± 0.22)10 3 /T+(23.89 ± 0.75)‰.Using … blind fiendish librarian helm
Carbon isotope fractionations in natural gases Nature
WebJul 4, 2024 · During aerobic vinyl chloride degradation, a C-C bond breakage is suspected to occur in the initial degradation step and results in a small carbon isotopic fractionation relative to anaerobic biodegradation pathways involving a C-Cl bond breakage (Chu et al. 2004; Chartrand et al. 2005). Similar results were observed for 1,2-DCA. WebExperimental evidences confirming the theory of carbon isotope discrimination and known complications are discussed. Carbon isotope composition also varies among different metabolites, compartments and plant organs as a result of fractionation during secondary metabolism and variation in the ratio of diffusional and carboxylation limitations. WebSummary. During photosynthetic CO 2 fixation fractionation of stable carbon isotopes occurs and, consequently, plants are generally depleted in the heavier isotope 13 C. Carbon … blind fighting feat