Results 31 to 40 of about 100,245 (263)

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, M. Dippold, M. Helfrich, J. Dyckmans   +3 more
doaj   +1 more source

Influence of Climate on Stable Nitrogen Isotopic Values of Contemporary Greek Samples: Implications for Isotopic Studies of Human Remains from Neolithic to Late Bronze Age Greece

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, Georgios Diamantopoulos   +1 more
doaj   +1 more source

An evaluation of migration fidelity of Ruby-throated Hummingbirds inferred from stable isotope methods [PDF]

PeerJ
Knowledge of spatial connectivity between breeding and non-breeding locations of migratory birds and their breeding site fidelity are important for avian conservation.
Geoff Koehler, Kevin J. Kardynal, Ron E. Jensen, Keith A. Hobson   +3 more
doaj   +2 more sources

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, Anastasia Elektra Poutouki, Theodora Nikou, Maria Halabalaki, Charalampos Proestos, Effie Tsakalidou, Sofia Gougoura, George Diamantopoulos, Maria Tassi, Elissavet Dotsika   +9 more
doaj   +1 more source

Nitrogen-Induced Changes in Soil Environmental Factors Are More Important Than Nitrification and Denitrification Gene Abundance in Regulating N2O Emissions in Subtropical Forest Soils

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, Abubakari Said Mgelwa, Shaofei Jin, Yalin Hu   +3 more
doaj   +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, Michael Power, Marlene Evans, Geoff Koehler, Milla Rautio   +4 more
doaj   +1 more source

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

FEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho, Shin Morioka, Junko Sasaki, Takehiko Sasaki   +3 more
wiley   +1 more source

Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation

FEBS Letters, EarlyView.
Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe, Tanmay Kumar Mohanty, Rashna Bhandari, Dorothea Fiedler   +3 more
wiley   +1 more source

Computational Mass Transfer Study of Special High-efficiency Packing Used in the Separation of Carbon-13

Journal of Isotopes, 2020
The separation of stable isotope carbon-13（13C） is very difficult because the separation coefficient is only 1.007. So it is necessary that nearly three thousand theoretical stages should be required to obtain a high abundance product of 99 atom% 13C. In
TIAN Yesheng;LI Hulin
doaj   +1 more source

Stable isotopic labeling in proteomics [PDF]

PROTEOMICS, 2008
AbstractLabeling of proteins and peptides with stable heavy isotopes (deuterium, carbon‐13, nitrogen‐15, and oxygen‐18) is widely used in quantitative proteomics. These are either incorporated metabolically in cells and small organisms, or postmetabolically in proteins and peptides by chemical or enzymatic reactions.
Gevaert, Kris, Impens, Francis, Ghesquière, Bart, Van Damme, Petra, Lambrechts, Anja, Vandekerckhove, Joël   +5 more
openaire   +3 more sources