Results 11 to 20 of about 77,450 (294)
Chemical and isotopic switching within the subglacial environment of a high Arctic glacier. [PDF]
, 2006 Natural environmental isotopes of nitrate, sulphate and inorganic carbon are discussed in conjunction with major ion chemistry of subglacial runoff from a High Arctic glacier, Midre Lovénbreen, Svalbard. The chemical composition of meltwaters is observed
Hodson, Andrew +3 more
core +5 more sources
Synthesis of 15N-Pyridines and Higher Mass Isotopologs via Zincke Imine Intermediates [PDF]
, 2023 Methods to incorporate stable radioisotopes are integral to pharmaceutical and agrochemical development. However, despite the prevalence of pyridines in candidate compounds, methods to incorporate 15N-atoms within their structures are limited.
Marie A., Hart +5 more
core +1 more source
14N to 15N Isotopic Exchange of Nitrogen Heteroaromatics through Skeletal Editing [PDF]
, 2023 The selective modification of nitrogen heteroaromatics enables the development of new chemical tools and accelerates drug discovery. While methods that focus on expanding or contracting the skeletal structures of heteroaromatics are emerging, methods for
Richmond, Sarpong +7 more
core +1 more source
, 2022 Editorial V.15N.37Editorial V.15N.37Editorial V.15N ...
Paschoarelli, Luis Carlos +2 more
core +1 more source
Reduced flavin : NMR investigation of N(5)-H exchange mechanism, estimation of ionisation constants and assessment of properties as biological catalyst [PDF]
, 2005 Background: The flavin in its FMN and FAD forms is a versatile cofactor that is involved in catalysis of most disparate types of biological reactions.
Müller, Franz +10 more
core +1 more source
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
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
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
, 2003 Background: Tuberculosis (TB) and HIV infection are wasting diseases that frequently occur together and have severe consequences on nutritional status.Objective: The objective was to determine the effects of TB and HIV, separately and together, on ...
Jackson, Alan A. +4 more
core +2 more sources