Results 41 to 50 of about 2,400,643 (255)
Geosciences, 2019 In this paper, we study δ15N enrichment as an indicator not only of marine protein diet, but also of climate change. The slope of the variation of δ15N with precipitation was calculated equal to 0.38/100 mm of precipitation for Greek plants, 0 ...
Elissavet Dotsika +1 more
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Microbial carbon recycling – an underestimated process controlling soil carbon dynamics – Part 1: A long-term laboratory incubation experiment [PDF]
Biogeosciences, 2015 Independent of its chemical structure carbon (C) persists in soil for several decades, controlled by stabilization and recycling. To disentangle the importance of the two factors on the turnover dynamics of soil sugars, an important compound of soil ...
A. Basler +3 more
doaj +1 more source
An evaluation of migration fidelity of Ruby-throated Hummingbirds inferred from stable isotope methods [PDF]
PeerJKnowledge of spatial connectivity between breeding and non-breeding locations of migratory birds and their breeding site fidelity are important for avian conservation.
Geoff Koehler +3 more
doaj +2 more sources
Microbial carbon recycling: an underestimated process controlling soil carbon dynamics – Part 2: A C3-C4 vegetation change field labelling experiment [PDF]
Biogeosciences, 2015 The mean residence times (MRT) of different compound classes of soil organic matter (SOM) do not match their inherent recalcitrance to decomposition. One reason for this is the stabilization within the soil matrix, but recycling, i.e.
A. Basler +3 more
doaj +1 more source
Isotopic Traceability (13C and 18O) of Greek Olive Oil
Molecules, 2020 In recent years, isotopic analysis has been proven a valuable tool for the determination of the origin of various materials. In this article, we studied the 18O and 13C isotopic values of 210 olive oil samples that were originated from different regions ...
Petros Karalis +9 more
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Synthesis of Isotope Labeled Protocatechuic Acid-(13COOH)
Journal of Isotopes, 2020 A novel synthesis method of protocatechuic acid-(13COOH) was designed. 3,4-dimethoxy bromobenzene as raw material, Grignard reagent was prepared by Grignard reaction, then passed through the 13C labeled 13CO2 gas, the intermediate 3,4-dimethoxy benzoic ...
XU Jianfei;LIU Zhanfeng;LU Weijing;LEI Wen;HOU Jie;DU Xiaoning
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Manganese–pyridone-catalyzed site-selective hydrogen isotope exchange of 2-arylpyridines using D2O [PDF]
RSC AdvancesWe report a manganese-catalyzed protocol for the selective ortho-deuteration of 2-arylpyridines using D2O as a readily available deuterium source. Enabled by Mn(CO)5Br and 2-pyridone, the reaction delivers deuterated products in good isolated yields with
Jian-Fei Bai +5 more
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Frontiers in Plant Science, 2022 Subtropical regions are currently experiencing a dramatic increase in nitrogen (N) deposition; however, the contributions of nitrification and denitrification processes to soil N2O emissions and the underlying mechanisms under increasing N deposition ...
Qingyan Qiu +3 more
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Smaller is better: nanobodies meet NMR
FEBS Letters, EarlyView.Nanobodies are single‐domain antigen‐binding fragments derived from camelid heavy chain antibodies. Their small size, high stability, and exceptional specificity make nanobodies uniquely useful probes for NMR studies of protein dynamics, transient conformational states, and protein–protein interactions.
Oleg Y. Dmitriev
wiley +1 more source
Content, composition, and transfer of polyunsaturated fatty acids in an Arctic lake food web
Ecosphere, 2022 Freshwater fish production depends on the production and use of polyunsaturated fatty acids (n‐3 and n‐6 PUFA) from lower trophic levels. Here, we aimed to identify the main trophic pathways that support PUFA content in different fish species (mean 39.7 ...
Guillaume Grosbois +4 more
doaj +1 more source