Results 21 to 30 of about 288,749 (288)

A dataset representing the impact of aromatic nuclei on the carbon isotope of gases

Data in Brief, 2020
This work presents a dataset which provides information on the influence of aromatic nuclei on the carbon isotope of gases. Gases analyzed herein were obtained by pyrolysis of model compounds and kerogens.
Yanhong Liu, Yingqin Wu, Yanqing Xia, Lantian Xing, Chuntao Tian, Tianzhu Lei   +5 more
doaj   +1 more source

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

Equations for lipid normalization of carbon stable isotope ratios in aquatic bird eggs. [PDF]

PLoS ONE, 2014
Stable isotope ratios are biogeochemical tracers that can be used to determine the source of nutrients and contaminants in avian eggs. However, the interpretation of stable carbon ratios in lipid-rich eggs is complicated because (13)C is depleted in ...
Kyle H Elliott, Mikaela Davis, John E Elliott   +2 more
doaj   +1 more source

Freezing and chemical preservatives alter the stable isotope values of carbon and nitrogen of the Asiatic clam (Corbicula fluminea) [PDF]

, 2011
We tested the impacts of most common sample preservation methods used for aquatic sample materials on the stable isotope ratios of carbon and nitrogen in clams, a typical baseline indicator organism for many aquatic food web studies utilising stable ...
Aurélia Martino, B Fry, B Kelly, BJ Peterson, CJ Sweeting, DM Post, Dorothée Kopp, Frédéric Santoul, H Feuchtmayr, HC Sarakinos, J Dannheim, J Syväranta, J Syväranta, Jari Syväranta, KL Bosley, LM Barrow, M Ventura, MM Mullin, MS Edwards, NO Ogawa, Régis Céréghino, S Carabel, S Kaehler   +22 more
core   +5 more sources

Carbon isotope reversal of desorbed gas in Longmaxi shale of Jiaoshiba area, Sicuhan Basin

Petroleum Research, 2017
Through analysis of components and carbon isotope compositions of gas desorbed from shale cores, the carbon isotope reversal phenomenon in the shale gas from the Silurian Longmaxi Formation of Jiaoshiba area in Sichuan Basin were well studied.
Hua Qin, Xiaojun Fan, Ming Liu, Jingyu Hao, Bo Liang   +4 more
doaj   +1 more source

Discussion on genesis of coalbed methane in Fukang Mining Area

Meikuang Anquan, 2021
The research area is Fukang Mining Area in the southern margin of Junggar Basin. The gas composition, methane carbon isotope, methane carbon isotope and carbon isotope of CO2 were tested in 10 CBM wells in the research area, and combined with the ...
HAO Huili, WANG Haichao, TIAN Jijun, YANG Shengbo, CHENG Xiaoqian
doaj   +1 more source

The DIC carbon isotope evolutions during CO2 bubbling: Implications for ocean acidification laboratory culture

Frontiers in Marine Science, 2022
Ocean acidification increases pCO2 and decreases pH of seawater and its impact on marine organisms has emerged as a key research focus. In addition to directly measured variables such as growth or calcification rate, stable isotopic tracers such as ...
Hongrui Zhang, Ismael Torres-Romero, Pien Anjewierden, Madalina Jaggi, Heather M. Stoll   +4 more
doaj   +1 more source

Stable isotope analysis provides new information on winter habitat use of declining avian migrants that is relevant to their conservation [PDF]

, 2012
Winter habitat use and the magnitude of migratory connectivity are important parameters when assessing drivers of the marked declines in avian migrants. Such information is unavailable for most species.
BJM Stutchbury, BN Smith, C Eraud, C Fry, CM Perrins, CP Chamberlain, D Lack, D Norman, DI Pearson, DJ Pain, DS Wilcove, E Yohannes, FJ Sanderson, G Gory, GD Farquhar, GJ Morel, I Burfield, I Newton, JA Grey, Jason Newton, JC Sealy, JC Vogel, JF Kelly, JM Neto, John W. Mallord, JR Ehleringer, K Risely, KA Hobson, Karl L. Evans, KL Evans, L Jenni, L Svensson, L Zwarts, LA Hill, M Cardillo, M Schaub, MB Hernquist, MJA Werger, MS Webster, N Cooper, N Saino, Ofer Ovadia, P Chantler, P Marra, RA Robinson, RF Inger, RP Ellis, S Bearhop, S Bensch, S Oppel, S Shultz, SD Newsome, SH Ambrose, Shai Markman, T Szép, T Szép, TB Coplen, TB Oatley, TS Reichlin, WJ Peach   +59 more
core   +4 more sources

Carbon isotope anomaly in the major plant C-1 pool and its global biogeochemical implications [PDF]

, 2004
We report that the most abundant C-1 units of terrestrial plants, the methoxyl groups of pectin and lignin, have a unique carbon isotope signature exceptionally depleted in C-13.
Hamilton, JTG, Harper, DB, Kalin, R., Keppler, F., McRoberts, WC   +4 more
core   +1 more source

Sedimentary organic matter from a cored Early Triassic succession, Georgetown (Idaho, USA)

Swiss Journal of Palaeontology, 2020
The plant fossil record from Lower Triassic sedimentary successions of the Western USA is extremely meager. In this study, samples from a drill core taken near Georgetown, Idaho, were analyzed for their palynological content as well as their stable ...
Elke Schneebeli-Hermann, Borhan Bagherpour, Torsten Vennemann, Marc Leu, Hugo Bucher   +4 more
doaj   +1 more source