Results 31 to 40 of about 2,289,697 (227)

LEAF CARBON-ISOTOPE DISCRIMINATION AND VEGETATIVE RESPONSES OF DRYAS-OCTOPETALA TO TEMPERATURE AND WATER MANIPULATIONS IN A HIGH ARCTIC POLAR SEMIDESERT, SVALBARD [PDF]

, 1993
Integrative ecophysiological and vegetative responses of Dryas octopetala were measured in response to field perturbations of temperature, precipitation and their interactions in a polar semi-desert in Svalbard, Norway (79-degrees-N, 12-degrees-E).
CALLAGHAN, TV, PARSONS, AN, PRESS, MC, Wookey, Phil, WELKER, JM, LEE, JA, Lee, John A, Welker, Jeffery M, Parsons, Andrew N, Wookey, Philip, Callaghan, Terry V, Press, Malcolm C   +11 more
core   +1 more source

Measurements of position-specific carbon isotopic compositions in propane by on-line Gas Chromatography-Pyrolysis-Gas Chromatography-Isotope Ratio Mass Spectrometer (GC-Py-GC-IRMS) and its preliminary application

Shiyou shiyan dizhi, 2022
In this study, an on-line Gas Chromatography-Pyrolysis-Gas Chromatography-Isotope Ratio Mass Spectrometer (GC-Py-GC-IRMS) was established to conduct position-specific isotope analysis (PSIA) by enrichment of compound interested, chromatographic ...
Yuanyuan MA, Cheng TAO, Liqiang BA, Jie WANG, Jipeng LI, Luyun LI, Yongge SUN   +6 more
doaj   +1 more source

Isotope Engineering of Carbon Nanotube Systems [PDF]

Physical Review Letters, 2005
4 pages, 4 ...
Simon, F., Kramberger, Ch., Pfeiffer, R., Kuzmany, H., Zólyomi, V., Kürti, J., Singer, P.M., Alloul, H.   +7 more
openaire   +4 more sources

Carbon stable isotope analysis of cereal remains as a way to reconstruct water availability: preliminary results [PDF]

, 2011
Reconstructing past water availability, both as rainfall and irrigation, is important to answer questions about the way society reacts to climate and its changes and the role of irrigation in the development of social complexity.
Jenkins, Emma L., Jenkins, Emma, Emma Jenkins, Pascal Flohr, Muldner, Gundula, Muldner, G., Flohr, Pascal, Flohr, P., Gundula Müldner   +8 more
core   +1 more source

Progress and challenges in using stable isotopes to trace plant carbon and water relations across scales [PDF]

Biogeosciences, 2012
Stable isotope analysis is a powerful tool for assessing plant carbon and water relations and their impact on biogeochemical processes at different scales.
C. Werner, H. Schnyder, M. Cuntz, C. Keitel, M. J. Zeeman, T. E. Dawson, F.-W. Badeck, E. Brugnoli, J. Ghashghaie, T. E. E. Grams, Z. E. Kayler, M. Lakatos, X. Lee, C. Máguas, J. Ogée, K. G. Rascher, R. T. W. Siegwolf, S. Unger, J. Welker, L. Wingate, A. Gessler   +20 more
doaj   +1 more source

Geochemical characteristics of coal-measure source rocks and coal-derived gas in Junggar Basin, NW China

Petroleum Exploration and Development, 2009
Carboniferous and Jurassic coal-measure rocks with their relative coal-formed gas are developed in Junggar Basin. Carboniferous source rocks have high organic material abundance, Type III organic material, and high maturity.
Li Jian, Jiang Zhenglong, Luo Xia, Wang Dongliang, Han Zhongxi   +4 more
doaj   +1 more source

The dissolution of olivine added to soil at 32°C: the fate of weathering products and its implications for enhanced weathering at different temperatures

Frontiers in Climate
The amendment of agricultural soils by crushed silicate minerals has been proposed to enhance weathering rates and facilitate carbon dioxide (CO2) removal from the atmosphere. Laboratory dissolution experiments typically provide weathering rates that are
Nicholas Iff, Phil Renforth, Philip A. E. Pogge von Strandmann   +2 more
doaj   +1 more source

Inversion Characteristics of Hydrocarbon Gases Carbon Isotopes Varying With Temperature and Implications for Shale Exploration

Frontiers in Earth Science, 2021
In order to understand the influence of source rock types and maturity on hydrocarbon gases carbon isotope change more objectively, a closed-system pyrolysis experiment was carried out on six samples from 250 to 550°C.
Yingqin Wu, Yanhong Liu, Tong Wang, Zhiyu Wang, Zhiyu Wang, Longmiao Yuan, Longmiao Yuan, Yanqin Xia   +7 more
doaj   +1 more source

Mechanisms of carbon isotopic fractionation in the process of natural gas generation: Geochemical evidence from thermal simulation experiment

Petroleum Exploration and Development, 2020
Low maturity coal samples were taken from the Ordos Basin to conduct gold tube thermal simulation experiment in a closed system, and the characteristics of the products were analyzed to find out the fractionation mechanism of carbon isotopes and the ...
Weilong PENG, Quanyou LIU, Guoyi HU, Yue LYU, Dongya ZHU, Qingqiang MENG, Fengtao GUO, Ruoli WANG   +7 more
doaj   +1 more source

Carbon isotope fractionation during aerobic biodegradation of trichloroethene by Burkholderia cepacia G4: a tool to map degradation mechanisms [PDF]

, 2002
The strain Burkholderia cepacia G4 aerobically mineralized trichloroethene (TCE) to CO2 over a time period of similar to20 h. Three biodegradation experiments were conducted with different bacterial optical densities at 540 nm (OD(540)s) in order to test
Schuth, Christoph, Downey, Angela, Larkin, Mike, Bill, Markus, Schuth, C., Bill, M., Markus Bill, Slater, G., Kalin, Robert M., Kalin, R.M., Barth, JAC, Angela Downey, Robert M. Kalin, Larkin, Michael, Slater, Greg F., Christoph Schüth, Larkin, M., Mike Larkin, Kalin, R., Johannes A. C. Barth, Greg Slater, Downey, A., Kalin, Bob, Slater, Greg, Barth, J.A.C., Barth, Johannes A. C.   +25 more
core   +1 more source