Results 11 to 20 of about 2,289,697 (227)

The potential of stable carbon and nitrogen isotope analysis of foxtail and broomcorn millets for investigating ancient farming systems

Frontiers in Plant Science, 2022
Foxtail and broomcorn millets are the most important crops in northern China since the early Neolithic. However, little evidence is available on how people managed these two crops in the past, especially in prehistory. Previous research on major C3 crops
Yu Dong, Yu Dong, Xiaoguang Bi, Rubi Wu, Eric J. Belfield, Nicholas P. Harberd, Bent T. Christensen, Mike Charles, Amy Bogaard   +8 more
doaj   +1 more source

Compound-Specific Stable Isotope Analysis of Amino Acids in Pelagic Shark Vertebrae Reveals Baseline, Trophic, and Physiological Effects on Bulk Protein Isotope Records

Frontiers in Marine Science, 2021
Variations in stable carbon and nitrogen isotope compositions in incremental tissues of pelagic sharks can be used to infer aspects of their spatial and trophic ecology across life-histories.
Sarah Magozzi, Sarah Magozzi, Simon R. Thorrold, Leah Houghton, Victoria A. Bendall, Stuart Hetherington, Gonzalo Mucientes, Gonzalo Mucientes, Lisa J. Natanson, Nuno Queiroz, Miguel N. Santos, Miguel N. Santos, Clive N. Trueman   +12 more
doaj   +1 more source

Study on Separation of Polycyclic Aromatic Hydrocarbons in Soils for Compound-specific Carbon Isotope Analysis

Yankuang ceshi, 2021
BACKGROUND Tracing the source of polycyclic aromatic hydrocarbons (PAHs) by the compound-specific carbon isotope is becoming increasingly popular. For precise carbon isotope analysis, a pretreatment process is required to reduce co-outflow and unresolved
XIE Man-man, LIU Mei-mei, WANG Shu-xian, LING Yuan, SUN Qing   +4 more
doaj   +1 more source

Application of the Data on δ¹³C and δ¹⁸O of Carbonates for the Study of Unconventional Reservoirs on the Example of the Bazhenov Source Rocks, Western Siberia, Russia

Geosciences, 2021
This paper addresses potential application of data on stable carbon and oxygen isotope composition of carbonates for study of organic rich source rocks on the example of the Late Jurassic–Early Cretaceous Bazhenov Formation (West Siberian petroleum basin,
Anna Yurchenko, Andrey Voropaev, Elena Kozlova, Nikita Morozov, Mikhail Spasennykh   +4 more
doaj   +1 more source

Limited evidence of C4 plant consumption in mound building Macrotermes termites from savanna woodland chimpanzee sites.

PLoS ONE, 2021
Stable isotope analysis is an increasingly used molecular tool to reconstruct the diet and ecology of elusive primates such as unhabituated chimpanzees.
Seth Phillips, Rudolf H Scheffrahn, Alex Piel, Fiona Stewart, Anthony Agbor, Gregory Brazzola, Alexander Tickle, Volker Sommer, Paula Dieguez, Erin G Wessling, Mimi Arandjelovic, Hjalmar Kühl, Christophe Boesch, Vicky M Oelze   +13 more
doaj   +1 more source

A view of the European carbon flux landscape through the lens of the ICOS atmospheric observation network [PDF]

Atmospheric Chemistry and Physics, 2023
The ICOS (Integrated Carbon Observation System) network of atmospheric measurement stations produces standardized data on greenhouse gas concentrations at 46 stations in 16 different European countries (March 2023).
I. Storm, U. Karstens, C. D'Onofrio, A. Vermeulen, A. Vermeulen, W. Peters, W. Peters   +6 more
doaj   +1 more source

Latest Permian carbonate carbon isotope variability traces heterogeneous organic carbon accumulation and authigenic carbonate formation [PDF]

Climate of the Past, 2017
Bulk-carbonate carbon isotope ratios are a widely applied proxy for investigating the ancient biogeochemical carbon cycle. Temporal carbon isotope trends serve as a prime stratigraphic tool, with the inherent assumption that bulk micritic carbonate ...
M. Schobben, M. Schobben, S. van de Velde, J. Gliwa, L. Leda, D. Korn, U. Struck, U. Struck, C. V. Ullmann, V. Hairapetian, A. Ghaderi, C. Korte, R. J. Newton, S. W. Poulton, P. B. Wignall   +14 more
doaj   +1 more source

The Feasibility Study of Separating Carbon Isotope by Gas Diffusion Method Using Ethanol as Processing Gas

Journal of Isotopes, 2022
As a marker for isotope tracing technology, carbon-13 is widely used and the market demand is on the rise. In order to explore the separation method of carbon-13 isotope, a gas diffusion separation experiment using ethanol as the processing gas was ...
LI Junjie;PAN Jianxiong;ZHOU Mingsheng;JIANG Dongjun;WANG Fei
doaj   +1 more source

Structure and flow of carbon and nitrogen to the western Irish Sea Nephrops norvegicus fishery: a stable isotope approach. [PDF]

, 2008
PhDStable isotope analysis was used to describe the structure and flow of organic matter (carbon and nitrogen) from primary production in the water column to the benthos, and into secondary production that supports a fishery for the lobster Nephrops ...
Hill, Jacqueline Mary, Hill, Jacqueline M   +1 more
core   +4 more sources

ISOTOPE-CONCENTRATION CHARACTERISTICS OF NATURAL WATERS IN THE NOVOSIBIRSK REGION AS A TOOL FOR CONTROL OF THEIR INTERACTION WITH THE ENVIRONMENT

Известия Томского политехнического университета: Инжиниринг георесурсов, 2023
The relevance of the research is caused by the need to develop the differentiation method for the water reservoirs with similar hydrogen and oxygen isotope composition using the combined isotope and concentration characteristic.
Aleksandr N. Pyrayev, Dmitry A. Novikov, Anastasia A. Maksimova, Fedor F. Dultsev, Anton S. Derkachev, Anatoliy V. Chernykh, Albina A. Khvacshevskaya   +6 more
doaj   +1 more source