Results 21 to 30 of about 105,636 (305)

Selenium and tellurium concentrations of Carboniferous British coals [PDF]

, 2019
The authors wish to thank Kier Group, the British Coal Utilisation Research Association (BCURA) and Uniper (E.On) for kindly providing coal samples.
Armstrong, Joseph, Bullock, Liam A., Feldmann, Joerg, Flores, Erico M. M., Henn, Alessandra S., Mello, Paola A., Mesko, Marcia F., Parnell, John   +7 more
core   +1 more source

Elution of Adsorbed n-alkanes by 5Å Molecular Sieve Using Solvent Mixtures for Compound-Specific Hydrogen Isotopic Analysis

Yankuang ceshi, 2017
The extraction procedure using solvent mixtures has been used to elute n-alkanes adsorped by 5Å molecular sieve and subsequent stable carbon isotope ratio analysis of individual n-alkanes.
CHEN Sha-sha, ZHU Xin-xu, JIA Wang-lu, YU Chi-ling, PENG Ping-an   +4 more
doaj   +1 more source

Seasonal variation of secondary organic aerosol tracers in Central Tibetan Plateau [PDF]

Atmospheric Chemistry and Physics, 2015
Secondary organic aerosol (SOA) affects the earth's radiation balance and global climate. High-elevation areas are sensitive to global climate change.
R.-Q. Shen, X. Ding, Q.-F. He, Z.-Y. Cong, Q.-Q. Yu, X.-M. Wang   +5 more
doaj   +1 more source

Early maturation processes in coal. Part 1: Pyrolysis mass balances and structural evolution of coalified wood from the Morwell Brown Coal seam [PDF]

, 2009
In this work, we develop a theoretical approach to evaluate maturation process of kerogen-like material, involving molecular dynamic reactive modeling with a reactive force field to simulate the thermal stress. The Morwell coal has been selected to study
Adler, Al Darouich, Albrecht, Bates, Behar, Behar, Dria, Elodie Salmon, Fowler, François Lorant, Françoise Behar, Hatcher, Hatcher, Hatcher, Hatcher, Hatcher, Holdgate, McKinney, Mukhopadhyay, Nelson, Nimz, Patrick G. Hatcher, Paul-Marie Marquaire, Payne, Philippi, Philp, Rappé, Root, Salmon, Solomon, Solomon, Spackman, Stout   +32 more
core   +4 more sources

Source apportionment and dynamic changes of carbonaceous aerosols during the haze bloom-decay process in China based on radiocarbon and organic molecular tracers [PDF]

Atmospheric Chemistry and Physics, 2016
Fine carbonaceous aerosols (CAs) is the key factor influencing the currently filthy air in megacities in China, yet few studies simultaneously focus on the origins of different CAs species using specific and powerful source tracers. Here, we present a
J. Liu, J. Li, D. Liu, P. Ding, C. Shen, Y. Mo, X. Wang, C. Luo, Z. Cheng, S. Szidat, Y. Zhang, Y. Chen, G. Zhang   +12 more
doaj   +1 more source

Tooth enamel nitrogen isotope composition records trophic position: a tool for reconstructing food webs

Communications Biology, 2023
Enamel-bound nitrogen isotopes in modern and fossil mammal teeth preserve dietary and trophic level information. This novel geochemical archive can be used to reconstruct trophic niche in ancient ecosystems.
Jennifer N. Leichliter, Tina Lüdecke, Alan D. Foreman, Nicolas Bourgon, Nicolas N. Duprey, Hubert Vonhof, Viengkeo Souksavatdy, Anne-Marie Bacon, Daniel M. Sigman, Thomas Tütken, Alfredo Martínez-García   +10 more
doaj   +1 more source

Fractionation of lead in soil by isotopic dilution and sequential extraction [PDF]

, 2011
‘Reactivity’ or ‘lability’ of lead is difficult to measure using traditional methods. We investigated the use of isotopic dilution with 204Pb to determine metal reactivity in four soils historically contaminated with contrasting sources of Pb, including (
A. M. Tye, Ahnstrom, Bacon, Breward, Burt, Cotter-Howells, Degryse, Degryse, E. H. Bailey, Grybos, G�bler, G�bler, Hammer, Jensen, Kaste, Lang, Li, Lombi, McBride, Morin, N. Breward, N. R. Atkinson, Nelms, Nolan, Phillips, S. D. Young, Sauv�, Semlali, Sinaj, Strawn, Terzano, Teutsch, Tongtavee, Weiss, Weiss, Welp, Wilson, Young   +37 more
core   +2 more sources

Seasonal and Day–Night Variations in Carbonaceous Aerosols and Their Light-Absorbing Properties in Guangzhou, China

Atmosphere, 2023
Carbonaceous aerosols (CAs), including elemental carbon (EC) and organic carbon (OC), have become the dominant component in PM2.5 in many Chinese cities, and it is imperative to address their spatiotemporal variations and sources in order to continually ...
Jiannan Su, Runqi Zhang, Bowen Liu, Mengxue Tong, Shaoxuan Xiao, Xiaoyang Wang, Qilong Zhao, Wei Song, Dilinuer Talifu, Xinming Wang   +9 more
doaj   +1 more source

Molecular composition and photochemical evolution of water-soluble organic carbon (WSOC) extracted from field biomass burning aerosols using high-resolution mass spectrometry [PDF]

Atmospheric Chemistry and Physics, 2020
Photochemistry plays an important role in the evolution of atmospheric water-soluble organic carbon (WSOC), which dissolves into clouds, fogs, and aerosol liquid water.
J. Cai, J. Cai, X. Zeng, G. Zhi, S. Gligorovski, G. Sheng, Z. Yu, X. Wang, P. Peng   +8 more
doaj   +1 more source

Diverse soil carbon dynamics expressed at the molecular level [PDF]

, 2017
The stability and potential vulnerability of soil organic matter (SOM) to global change remains incompletely understood due to the complex processes involved in its formation and turnover.
Angst, Angst, Baisden, Batjes, Berhe, Bull, Bush, C. I. Zell, C. P. McIntyre, Carvalhais, Cerli, Collister, Cooper, Dai, Davidson, Diefendorf, Doetterl, Doetterl, Doetterl, Drenzek, E. Graf Pannatier, Eglinton, Eglinton, Eglinton, Etzold, F. Hagedorn, Feng, Feng, Feng, Feng, Galy, Galy, Gong, Graf Pannatier, Graf Pannatier, Graf Pannatier, He, Hobbie, Huang, Ivy-Ochs, Jandl, Jansen, Kalbitz, Krull, Lutzow, Matsumoto, Meehl, Muhr, Murage, N. Haghipour, Paul, Petsch, Reiffarth, Rethemeyer, Rumpel, Saliot, Sanderman, Schaub, Schmidt, Schrumpf, Schrumpf, Schäfer, Simoneit, Six, Solly, Spinoni, T. I. Eglinton, T. S. van der Voort, Tao, Tipping, Torn, Voort, Walthert, Walthert, Wiesenberg, Wiesenberg, Wynn, Wynn, X. Feng, Zhang   +79 more
core   +1 more source