Results 21 to 30 of about 3,012,109 (369)

Chemostratigraphy of Neoproterozoic carbonates: implications for 'blind dating' [PDF]

, 2001
The delta C-13(carb) and Sr-87/Sr-86 secular variations in Neoproteozoic seawater have been used for the purpose of 'isotope stratigraphy' but there are a number of problems that can preclude its routine use.
Aharon P., Anthony E. Fallick, Anton B. Kuznetsov, Bowring S.A., Brand U., Brasier M.D., Brasier M.D., Brasier M.D., Burns S.J., Calver C.R., Corsetti F.A., Fairchild I.J., Fairchild I.J., Gao G., Gorokhov I.M., Gorokhov I.M., Gorokhov I.M., Grotzinger J.P., Grotzinger J.P., Hoffman P.F., Igor M. Gorokhov, Kaufman A.J., Kennedy M.J., Kirschvink J.L., Knoll A.H., Knoll A.H., Knoll A.H., Kupecz J.A., Kuznetsov A.B., Kuznetsov A.B., Lambert I.B., Magaritz M., McArthur J.M., McArthur J.M., McCulloch M.T., Melezhik V.A., Morton J.P., Ovchinnikova G.V., Pelechaty S.M., Podkovyrov V.N., Pokrovsky B.G., Pokrovsky B.G., Pokrovsky B.G., Saylor B.Z., Semikhatov M.A., Singh U., Smith L.H., Tronnes R.G., Tucker M.E., Tucker M.E., Veizer J., Veizer J., Victor A. Melezhik, Wada S.-I., Walter M.R., Wang Da-Rui   +55 more
core   +1 more source

Fingerprinting Blue Carbon: Rationale and Tools to Determine the Source of Organic Carbon in Marine Depositional Environments

Frontiers in Marine Science, 2019
Blue carbon is the organic carbon in oceanic and coastal ecosystems that is captured on centennial to millennial timescales. Maintaining and increasing blue carbon is an integral component of strategies to mitigate global warming.
Nathan R. Geraldi, Alejandra Ortega, Oscar Serrano, Peter I. Macreadie, Catherine E. Lovelock, Catherine E. Lovelock, Dorte Krause-Jensen, Dorte Krause-Jensen, Hilary Kennedy, Paul S. Lavery, Michael L. Pace, Joeri Kaal, Carlos M. Duarte   +12 more
doaj   +1 more source

Modern Strategies for Carbon Isotope Exchange

Angewandte Chemie, 2023
AbstractIn contrast to stable and natural abundant carbon‐12, the synthesis of organic molecules with carbon (radio)isotopes must be conceived and optimized in order to navigate through the hurdles of radiochemical requirements, such as high costs of the starting materials, harsh conditions and radioactive waste generation.
Labiche, Alexandre, Malandain, Augustin, Molins, Maxime, Taran, Frédéric, Audisio, Davide   +4 more
openaire   +4 more sources

Factors influencing the stable carbon isotopic composition of suspended and sinking organic matter in the coastal Antarctic sea ice environment [PDF]

, 2011
A high resolution time-series analysis of stable carbon isotopic signatures in particulate organic carbon (δ¹³C_POC) and associated biogeochemical parameters in sea ice and surface waters provides an
Annett, A.L., Carson, D.S., Clarke, A., Crosta, X., Dougans, J., Fallick, A.E., Ganeshram, R.S., Henley, S.F., Tait, A., Weston, K.   +9 more
core   +6 more sources

Features and origin of oil degraded gas of Santai field in Junggar Basin, NW China

Petroleum Exploration and Development, 2015
Based on comprehensive analysis of the natural gas composition, carbon isotopes and associated oil carbon isotopes, saturated hydrocarbon chromatography, and gas chromatography-mass spectrography, the features and formation mechanisms of natural gas in ...
Jungang LU, Li WANG, Shijia CHEN, Hui HAN, Huanxu ZHANG, Youlin HUANG, Xiaobo HE, Pan ZHAN, Shiying ZHOU, Anran ZHANG, Xiaotian LI   +10 more
doaj   +1 more source

A pilot study of stable isotope fractionation in Bombyx mori rearing

Scientific Reports, 2023
Hydrogen, oxygen, carbon, and nitrogen isotopes derived from three different strains of silkworms at different life stages involved in silkworm rearing, were measured to understand the fractionation characteristics of stable isotopes at different stages ...
Hao Li, Yujie He, Jinzhong Lu, Liling Jia, Yong Liu, Dan Yang, Shuai Shao, Gang Lv, Hailiang Yang, Hailing Zheng, Yang Zhou, Zhiqin Peng   +11 more
doaj   +1 more source

Depleted carbon isotope compositions observed at Gale crater, Mars

Proceedings of the National Academy of Sciences of the United States of America, 2022
Significance Carbon isotopic analysis is among the most pervasive geochemical approaches because the fractionation of carbon isotopes produces a natural tracer of biological and chemical processes.
C. House, G. Wong, C. Webster, G. Flesch, H. Franz, J. Stern, A. Pavlov, S. Atreya, J. Eigenbrode, A. Gilbert, A. Hofmann, M. Millan, A. Steele, D. Glavin, C. Malespin, P. Mahaffy   +15 more
semanticscholar   +1 more source

Assortative Mating By Diet In A Phenotypically Unimodal But Ecologically Variable Population Of Stickleback [PDF]

, 2008
Speciation with gene flow may be driven by a combination of positive assortative mating and disruptive selection, particularly if selection and assortative mating act on the same trait, eliminating recombination between ecotype and mating type ...
Bolnick, Daniel I., Snowberg, Lisa K.
core   +1 more source

Effects of Upwelling Intensity on Nitrogen and Carbon Fluxes through the Planktonic Food Web off A Coruña (Galicia, NW Spain) assessed with Stable Isotopes

Diversity, 2020
The input of new nutrients by upwelling in shelf waters, and the associated carbon and nitrogen fluxes, can be traced by their stable isotope signatures in organic matter.
Antonio Bode, Angel F. Lamas, Carmen Mompeán   +2 more
doaj   +1 more source

Degradation changes stable carbon isotope depth profiles in palsa peatlands [PDF]

Biogeosciences, 2014
Palsa peatlands are a significant carbon pool in the global carbon cycle and are projected to change by global warming due to accelerated permafrost thaw. Our aim was to use stable carbon isotopes as indicators of palsa degradation.
J. P. Krüger, J. Leifeld, C. Alewell
doaj   +1 more source