Results 61 to 70 of about 20,788 (267)

Oil‐Coated Nanoplastics Induce Rapid Membrane Disruption and Severe Intestinal Injury

Advanced Science, EarlyView.
Oil‐rich food contact dramatically amplifies MNP release from plastic takeout containers, producing oil‐coated nanoplastics with altered surface properties and rapid membrane‐disruptive effects. These particles cause severe intestinal barrier damage and immune dysfunction in mice, and risk modeling suggests that long‐term gastrointestinal burdens may ...
Ruwen Xie, Gulimire Yilihan, Qiong Chen, Dachuan Lin, Zhen Liu, Mengyi Yuan, Yujia Wang, Haoteng Xu, Weishang Zhou, Wanxin Gong, Yueer Li, Chen Peng, Tong Yang, Peng Gao, Qing Liu, Xin‐Hua Feng, Mu Xiao, Chao Jiang   +17 more
wiley   +1 more source

Sulfur isotope analyses of individual aerosol particles in the urban aerosol at a central European site (Mainz, Germany) [PDF]

Atmospheric Chemistry and Physics, 2008
Sulfur isotope analysis of atmospheric aerosols is a well established tool for identifying sources of sulfur in the atmosphere, estimating emission factors, and tracing the spread of sulfur from anthropogenic sources through ecosystems.
B. W. Sinha, P. Hoppe, J. Huth, S. Foley, M. O. Andreae   +4 more
doaj  

Assessing Sedimentary Boundary Layer Calcium Carbonate Precipitation and Dissolution Using the Calcium Isotopic Composition of Pore Fluids

Frontiers in Earth Science, 2021
We present pore fluid geochemistry, including major ion and trace metal concentrations and the isotopic composition of pore fluid calcium and sulfate, from the uppermost meter of sediments from the Gulf of Aqaba (Northeast Red Sea) and the Iberian Margin
Daniel H. James, Harold J. Bradbury, Gilad Antler, Gilad Antler, Zvi Steiner, Zvi Steiner, Alec M. Hutchings, Xiaole Sun, Raoul Saar, Mervyn Greaves, Alexandra V. Turchyn   +10 more
doaj   +1 more source

Evidence for an impact-induced biosphere from the δ34S signature of sulphides in the Rochechouart impact structure, France [PDF]

, 2017
The highly eroded 23 km diameter Rochechouart impact structure, France, has extensive evidence for post-impact hydrothermal alteration and sulphide mineralization.
Boyce, A.J., Lambert, P., Lee, M.R., Lindgren, P., Simpson, S.L.   +4 more
core   +1 more source

Fractionation of sulfur isotopes in the preparation of sulfur dioxide. An improved technique for the precision analysis of stable sulfur isotopes

GEOCHEMICAL JOURNAL, 1966
It is definitely shown that the main cause of error encountered in the precision isotope analysis of sulfur is in the isotope exchange reaction between SO2 and SO3 during the combustion process of SO2 preparation. The isotope fractionation factor between the two oxides is estimated to be 1.0035 at 1200°C.
Hitoshi Sakai, Masahiro Yamamoto
openaire   +2 more sources

Recent Advances and Challenges in Ammonia‐Hydrogen Energy Conversion

Advanced Science, EarlyView.
This work summarizes the latest progress of various catalytic methods in ammonia‐hydrogen energy conversion. The challenges and outlook of ammonia‐hydrogen energy conversion system are also emphasized. This work expects to build a blueprint of renewable and efficient ammonia‐hydrogen energy conversion systems under mild conditions.
Menghao Lv, Runchao Qin, Jianshuo Chen, Kaiwen Yang, Jianwei Lu, Weiwei Lei, Yifu Yu   +6 more
wiley   +1 more source

Sulfur Isotope Constraints on the Petrogenesis of the Kimberley Kimberlites

Geochemistry, Geophysics, Geosystems, 2021
Cretaceous kimberlites in southern Africa have been suggested to host deeply subducted material in their mantle sources based on radiogenic isotope systematics. However, potential subducted material contributions to the volatile budget, including sulfur,
Angus Fitzpayne, Andrea Giuliani, Nivea Magalhães, Ashton Soltys, Marco L. Fiorentini, James Farquhar   +5 more
doaj   +1 more source

Carbon isotope fractionation and depletion in TMC1

, 2012
12C/13C isotopologue abundance anomalies have long been predicted for gas-phase chemistry in molecules other than CO and have recently been observed in the Taurus molecular cloud in several species hosting more than one carbon atom, i.e.
Adande, Balser, Bensch, Boger, Burgh, Cambrésy, Flower, Furuya, Gerin, Goldsmith, H. S. Liszt, L. M. Ziurys, Lis, Liszt, Lucas, Maezawa, Milam, Ohishi, Pineda, Pratap, Sakai, Sheffer, Smith, Sonnentrucker, Takano, Wakelam, Willacy, Wilson, Wilson, Wolfire, Woods   +30 more
core   +1 more source

Patterns of sulfur isotope fractionation during microbial sulfate reduction [PDF]

Geobiology, 2015
AbstractStudies of microbial sulfate reduction have suggested that the magnitude of sulfur isotope fractionation varies with sulfate concentration. Small apparent sulfur isotope fractionations preserved in Archean rocks have been interpreted as suggesting Archean sulfate concentrations of <200 μm, while larger fractionations thereafter have been ...
Bradley, A. S., Leavitt, William, Schmidt, M., Knoll, Andrew, Girguis, Peter, Johnston, David   +5 more
openaire   +3 more sources

Enhancing Biogenic Formic Acid Production in the Modified OxFA Process by Acetonitrile Addition

Advanced Science, EarlyView.
In this study, the beneficial effect of using acetonitrile as a co‐solvent in the modified OxFA process is shown, outperforming methanol, demonstrating improved reaction kinetics combined with high selectivity for the HPA‐2 (H5PV2Mo10O40) catalyzed oxidation of xylose to FA.
Jan‐Dominik H. Krueger, Pegah Saedi, Maximilian J. Poller, Alberto Collauto, Jason P. Hallett, David Robinson, Maxie M. Roessler, Jakob Albert   +7 more
wiley   +1 more source