Results 11 to 20 of about 107,558 (336)

Evidence of late Quaternary environmental change in a continental east Antarctic lake from lacustrine sedimentary pigment distributions [PDF]

, 2005
A sediment core from Progress Lake, one of the oldest lacustrine sequences in East Antarctica, contains distinct zones dating from a previous interglacial (most likely Marine Isotope Stage 5e, c.
Hodgson, D A, Keely, B J, Squier, A H
core   +2 more sources

Characteristics of stable carbon isotopic composition of shale gas

Journal of Natural Gas Geoscience, 2016
A type Ⅱ kerogen with low thermal maturity was adopted to perform hydrocarbon generation pyrolysis experiments in a vacuum (Micro-Scale Sealed Vessel) system at the heating rates of 2 °C/h and 20 °C/h.
Zhenya Qu, Jianan Sun, Jianting Shi, Zhaowen Zhan, Yanrong Zou, Ping'an Peng   +5 more
doaj   +1 more source

Formation of secondary aerosols from gasoline vehicle exhaust when mixing with SO₂ [PDF]

Atmospheric Chemistry and Physics, 2016
Sulfur dioxide (SO2) can enhance the formation of secondary aerosols from biogenic volatile organic compounds (VOCs), but its influence on secondary aerosol formation from anthropogenic VOCs, particularly complex mixtures like vehicle exhaust, remains
T. Liu, T. Liu, X. Wang, Q. Hu, W. Deng, W. Deng, Y. Zhang, X. Ding, X. Fu, X. Fu, F. Bernard, F. Bernard, Z. Zhang, Z. Zhang, S. Lü, S. Lü, Q. He, Q. He, X. Bi, J. Chen, Y. Sun, J. Yu, P. Peng, G. Sheng, J. Fu   +24 more
doaj   +1 more source

Concentration, source identification, and exposure risk assessment of PM2.5-bound parent PAHs and nitro-PAHs in atmosphere from typical Chinese cities

Scientific Reports, 2017
Sixteen parent PAHs and twelve nitro-PAHs were measured in PM2.5 samples collected over one year (2013–2014) at nine urban sites in China. During the sampling period, concentrations of individual nitro-PAHs were one or two orders of magnitude lower than ...
Di Liu, Tian Lin, Jabir Hussain Syed, Zhineng Cheng, Yue Xu, Kechang Li, Gan Zhang, Jun Li   +7 more
doaj   +1 more source

Design and characterization of a smog chamber for studying gas-phase chemical mechanisms and aerosol formation [PDF]

Atmospheric Measurement Techniques, 2014
We describe here characterization of a new state-of-the-art smog chamber facility for studying atmospheric gas-phase and aerosol chemistry. The chamber consists of a 30 m3 fluorinated ethylene propylene (FEP) Teflon film reactor housed in a temperature ...
X. Wang, T. Liu, F. Bernard, X. Ding, S. Wen, Y. Zhang, Z. Zhang, Q. He, S. Lü, J. Chen, S. Saunders, J. Yu   +11 more
doaj   +1 more source

Anomalous negative excursion of carbon isotope in organic carbon after the last Paleoproterozoic glaciation in North America [PDF]

, 2010
Early Paleoproterozoic time (2.5–2.0 Ga) spanned a critical phase in Earth's history, characterized by repeated glaciations and an increase in atmospheric oxygen (the Great Oxidation Event (GOE)).
Bekker, Bekker, Bekker, Bekker, Clayton, Dutkiewicz, Eigenbrode, Eiichi Tajika, Evans, Gair, Hayes, Hayes, Hayes, Holland, Joseph L. Kirschvink, Karhu, Kazuhisa Goto, Kirschvink, Kohonen, Long, Marmo, McLennan, Nanako O. Ogawa, Naohiko Ohkouchi, Ogawa, Ohkouchi, Ojakangas, Ojakangas, Ojakangas, Papineau, Pavlov, Rainbird, Rasmussen, Ryuji Tada, Schoell, Shinji Yamamoto, Vallini, Yasuhito Sekine, Young, Young, Young, Young   +41 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

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   +3 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

The Transformation of Sediment Into Rock : Insights From IODP Site U1352, Canterbury Basin, New Zealand [PDF]

, 2017
ACKNOWLEDGMENTS We thank the crew of the RV JOIDES Resolution for professional seamanship, excellent drilling, and the scientific support on board. GHB and SCG thank the Australia–New Zealand IODP Consortium (ANZIC), and KMM thanks the Consortium for ...
Browne, Greg H., Carson, David, Dinarès-Turell, Jaume, George, Simon C., IODP Expedition 317 Scientific Party, Jaeger, John M., Kemp, David B., Marsaglia, Kathleen M., Richaud, Mathieu   +8 more
core   +1 more source