Heavy hydrogen in the stratosphere [PDF]
Atmospheric Chemistry and Physics, 2003 We report measurements of the deuterium content of molecular hydrogen (H2) obtained from a suite of air samples that were collected during a stratospheric balloon flight between 12 and 33 km at 40º N in October 2002.
T. Röckmann, T. S. Rhee, A. Engel
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Carbon isotope anomaly in the major plant C-1 pool and its global biogeochemical implications [PDF]
, 2004 We report that the most abundant C-1 units of terrestrial plants, the methoxyl groups of pectin and lignin, have a unique carbon isotope signature exceptionally depleted in C-13.
Kalin, R. +4 more
core +4 more sources
Effects of alkalinity and salinity at low and high light intensity on hydrogen isotope fractionation of long-chain alkenones produced by Emiliania huxleyi [PDF]
Biogeosciences, 2017 Over the last decade, hydrogen isotopes of long-chain alkenones have been shown to be a promising proxy for reconstructing paleo sea surface salinity due to a strong hydrogen isotope fractionation response to salinity across different environmental ...
G. M. Weiss +6 more
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A consistent molecular hydrogen isotope chemistry scheme based on an independent bond approximation [PDF]
, 2009 The isotopic composition of molecular hydrogen (H<sub>2</sub>) produced by photochemical oxidation of methane (CH<sub>4</sub>) and Volatile Organic Compounds (VOCs) is a key quantity in the global isotope budget of (H<sub>2 ...
Sub Atmospheric physics and chemistry +8 more
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Global modelling of H2 mixing ratios and isotopic compositions with the TM5 model [PDF]
, 2011 The isotopic composition of molecular hydrogen (H2) contains independent information for constraining the global H2 budget. To explore this, we have implemented hydrogen sources and sinks, including their stable isotopic composition and isotope ...
Langenfelds, R.L. +16 more
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Hydrogen in Nominally Anhydrous Crustal Minerals [PDF]
, 2003 Systematic infrared and nuclear magnetic resonance investigations of common crustal minerals were undertaken to better understand the geologic significance of minor components of structural hydrous species within these nominally anhydrous minerals ...
Johnson, Elizabeth Ann
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Carbon isotope fractionation during aerobic biodegradation of trichloroethene by Burkholderia cepacia G4: a tool to map degradation mechanisms [PDF]
, 2002 The strain Burkholderia cepacia G4 aerobically mineralized trichloroethene (TCE) to CO2 over a time period of similar to20 h. Three biodegradation experiments were conducted with different bacterial optical densities at 540 nm (OD(540)s) in order to test
Schuth, Christoph +25 more
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Quantification of methane oxidation in the rice rhizosphere using 13C-labelled methane [PDF]
, 1994 In this paper isotope ratio mass spectrometry is used to determine the methane (CH4) oxidation fraction in the rhizosphere of intact rice plant-soil systems.
Harren, F.J.M. +11 more
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Century-to-millennial scale climatic variability in Lake Malawi revealed by isotope records. [PDF]
, 2007 Diatom-based oxygen isotope data (δ18Odiatom) from Lake Malawi show multi-centennial scale wetâ dry intervals spaced approximately every 2.3 ka throughout a 25 ka sequence.
Leng, Melanie J. +3 more
core +6 more sources
Frontiers in Microbiology, 2019 We determined 2H stable isotope fractionation at natural abundances associated with hydrogenase activity by whole cells of Desulfovibrio vulgaris strain Miyazaki F expressing a NiFe(Se) hydrogenase.
Michaela Löffler +3 more
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