Results 81 to 90 of about 107,082 (295)

Kinetic isotope effects and how to describe them [PDF]

Structural Dynamics, 2017
We review several methods for computing kinetic isotope effects in chemical reactions including semiclassical and quantum instanton theory. These methods describe both the quantization of vibrational modes as well as tunneling and are applied to the ⋅H + H2 and ⋅H + CH4 reactions.
Karandashev, Konstantin, Xu, Zhen-Hao, Meuwly, Markus, Vaníček, Jiří, Richardson, Jeremy O.   +4 more
openaire   +5 more sources

Soil water stable isotopes reveal evaporation dynamics at the soil–plant–atmosphere interface of the critical zone [PDF]

, 2017
Acknowledgements. We are thankful for the support by Audrey Innes during all laboratory work. We further thank Jonathan Dick for running the isotope analysis of precipitation samples and Annette C. Raffan for her support in the soil texture analysis.
Soulsby, Chris, Sprenger, Matthias, Tetzlaff, Doerthe   +2 more
core   +3 more sources

Electrochemical Carbon Dioxide Reduction to Methanol on Copper‐Based Catalysts: Mechanistic Insights and Industrial Prospects

Advanced Materials, EarlyView.
This review presents a focused and integrated perspective on copper‐based catalysts for the selective electrochemical reduction of CO2 to methanol. It elucidates active site dynamics, mechanistic pathways, and structure–activity relationships, while connecting fundamental insights with catalyst design, reactor engineering, and techno‐economic ...
Debabrata Bagchi, Carsten Walter, Venkata S. R. K. Tandava, Yasmin Lucero Cobos‐Becerra, Jack C. Q. Fletcher, Nico Fischer, Tobias Sontheimer, Prashanth W. Menezes   +7 more
wiley   +1 more source

Isotope engineering achieved by local coordination design in Ti-Pd co-doped ZrCo-based alloys

Nature Communications
Deuterium/Tritium (D/T) handling in defined proportions are pivotal to maintain steady-state operation for fusion reactors. However, the hydrogen isotope effect in metal-hydrogen systems always disturbs precise D/T ratio control.
Jiacheng Qi, Xu Huang, Xuezhang Xiao, Xinyi Zhang, Panpan Zhou, Shuoqing Zhang, Ruhong Li, Huaqin Kou, Fei Jiang, Yong Yao, Jiangfeng Song, Xingwen Feng, Yan Shi, Wenhua Luo, Lixin Chen   +14 more
doaj   +1 more source

Stable carbon isotope ratios of toluene in the boundary layer and the lower free troposphere [PDF]

Atmospheric Chemistry and Physics, 2013
During the field campaign ZEPTER-2 in autumn 2008 whole air samples were collected on board a Zeppelin NT airship in the planetary boundary layer (PBL) and the lower free troposphere (LFT) over south-west Germany using the ZEppelin Based Isotope Sampler (
J. Wintel, E. Hösen, R. Koppmann, M. Krebsbach, A. Hofzumahaus, F. Rohrer   +5 more
doaj   +1 more source

Influence of mutations of Val226 on the catalytic rate of haloalkane dehalogenase [PDF]

, 1997
Haloalkane dehalogenase converts haloalkanes to their corresponding alcohols. The 3D structure, reaction mechanism and kinetic mechanism have been studied.
Janssen, Dick B.,, Kingma, Jaap,, Ridder, Anja,, Schanstra, Joost P.,   +3 more
core   +2 more sources

Engineering Bilayer Tandem Catalysts on Si‐Based Photocathodes for High‐performance CO2 Reduction to Produce Methane

Advanced Materials, EarlyView.
A Cu/Ag‐Cu bilayer tandem catalyst is designed for a pyramid‐structured p‐Si photocathode, creating multiple and functionally distinct interfaces tailored to specific reaction steps and intermediate stabilization. This Cu/Ag‐Cu‐decorated p‐Si photocathode exhibits both high photocurrent and good selectivity for photoelectrochemical CO2 reduction to CH4.
Hao Wu, Shenghe Si, Haitao Wang, Changlai Wang, Rongchi Dai, Jianuo Li, Shohei Fukaya, Zhenhua Pan, Yujie Xiong, Noritaka Usami, Koyo Norinaga, Yasuyoshi Kurokawa, Suchada Sirisomboonchai, Dong Liu, Qian Wang   +14 more
wiley   +1 more source

Stable carbon isotope discrimination by human 3-hydroxy-3-methylglutaryl-coenzyme A reductase

Journal of Lipid Research, 2008
The aim of this study was to investigate the possible existence and magnitude of stable carbon isotope discrimination by human 3-hydroxy-3-methylglutaryl-coenzyme A reductase (HMGR). The catalytic portion of HMGR was expressed and purified.
Svena M. Lüdke, Ulrich Flenker, Wilhelm Schänzer, Dietmar Schomburg   +3 more
doaj   +1 more source

Trapped Fluorine Enables Thermally Stable Broadband Photodetection in Graphene/Fluorinated Graphene Heterostructure

Advanced Materials Technologies, EarlyView.
Fluorinated graphene has opened new opportunities for real‐world applications; however, its working and thermal stability are key issues for practical use. This study successfully demonstrates the stability of a fluorinated graphene‐based photodetector, achieved through a graphene, fluorinated graphene heterostructure (Gr/F‐Gr HS).
Mukesh Kumar Thakur, Javier Varillas, Oleksandr Volochanskyi, Golam Haider, Jan Plšek, Farjana J. Sonia, Álvaro Rodríguez, Jaganandha Panda, Martin Mergl, Otakar Frank, Jana Vejpravová, Martin Kalbáč   +11 more
wiley   +1 more source

Bis-allylic Deuterated DHA Alleviates Oxidative Stress in Retinal Epithelial Cells

Antioxidants, 2019
Oxidative stress plays a crucial role in developing and accelerating retinal diseases including age-related macular degeneration (AMD). Docosahexaenoic acid (DHA, C22:6, n-3), the main lipid constituent of retinal epithelial cell membranes, is highly ...
Mélissa Rosell, Martin Giera, Philippe Brabet, Mikhail S. Shchepinov, Michel Guichardant, Thierry Durand, Joseph Vercauteren, Jean-Marie Galano, Céline Crauste   +8 more
doaj   +1 more source