Results 11 to 20 of about 149,608 (284)
15N NMR study of a mixture of uniformly labeled tRNAs [PDF]
, 1982 15N NMR spectra were taken of 15N-enriched tRNA extracted from bakers yeast; ammonium sulfate was used as a nitrogen source. The increase in the degree of denaturation of tRNA, which occurs with increase in temperature from 30 degrees C to 70 degrees C ...
Birdseye, Theresa R. +3 more
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Ecotoxicology and Environmental Safety, 2021 Stable isotope labeling of pollutants is a valuable tool to investigate their environmental transport and degradation. For the globally most frequently used herbicide glyphosate, such studies have, so far, been hampered by the absence of an analytical ...
Marisa A. Wirth +5 more
doaj +1 more source
15N-labed glycine synthesis [PDF]
Anais da Academia Brasileira de Ciências, 2006 This work describes a method for 15N-isotope-labeled glycine synthesis, as well as details about a recovery line for nitrogen residues. To that effect, amination of alpha-haloacids was performed, using carboxylic chloroacetic acid and labeled aqueous ammonia (15NH3).
Tavares, Claudinéia R.O. +4 more
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Journal of Forest Science, 2008 We analysed stable isotopes of N in a spruce forest under ambient rainfall (no further manipulation of the atmospheric input) and clean rain application (10 years of reduced inorganic N- and acid-constituent input).
S. P. Sah, R. Brumme, N. Lamersdorf
doaj +1 more source
Isotopic Anomalies in Primitive Solar System Matter: Spin-state Dependent Fractionation of Nitrogen and Deuterium in Interstellar Clouds [PDF]
, 2012 Organic material found in meteorites and interplanetary dust particles is enriched in D and 15N. This is consistent with the idea that the functional groups carrying these isotopic anomalies, nitriles and amines, were formed by ion-molecule chemistry in ...
Charnley, S. B. +3 more
core +3 more sources
Plant, Soil and Environment, 2005 This study aims to investigate the changes in isotope ratios in foliage and soils of the two spruce forests [Picea abies (L.) Karst.] differing greatly in their atmospheric N deposition and climatic conditions.
S.P. Sah
doaj +1 more source
Natural 15N abundance in two nitrogen saturated forest ecosystems at Solling, Germany
Journal of Forest Science, 2003 This research deals with a comparative study of two different N-saturated forests: 1. beech forest and 2. spruce forest at the same locality of \solling, Central Germany.
S.P. Sah, R. Brumme
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Global Ecology and Conservation, 2022 In N-limited temperate regions of China, rates of atmospheric N deposition remain high during winter due to industrial development and energy consumption. Winter-deposited N accumulates and is then released after snowmelt.
Linna Ma +3 more
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Generating and sustaining long-lived spin states in 15N,15N′-azobenzene [PDF]
, 2019 Long-Lived spin States (LLSs) hold a great promise for sustaining non-thermal spin order and investigating various slow processes by Nuclear Magnetic Resonance (NMR) spectroscopy.
Ivanov, Konstantin L. +6 more
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Analysis of the urinary glucose-[15N, 15N]-ureide content in the study of the lactose-[15N, 15N]-ureide metabolism in healthy humans [PDF]
European Journal of Clinical Nutrition, 2011 Lactose-[15N, 15N]-ureide is used to study the fate of the colonic urea-nitrogen metabolism. During the passage through the gastrointestinal tract, lactose ureide is hydrolysed to glucose ureide, which is absorbed to a limited extent from the small intestine and is excreted urinarily. In the present study, a procedure has been developed to quantify the
V De Preter +4 more
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