Results 161 to 170 of about 1,197 (262)

Radioisotopic chronology of Ocean Anoxic Event 1a: Framework for analysis of driving mechanisms. [PDF]

Sci Adv
Li Y, Singer BS, Takashima R, Schmitz MD, Podrecca LG, Sageman BB, Selby D, Yamanaka T, Mohr MT, Hayashi K, Tomaru T, Savatic K.   +11 more
europepmc   +1 more source

Visible‐Light Driven Acetylene Semi‐Hydrogenation to Ethylene With a Copper Photosensitizer and a Cobaloxime Catalyst

Chemistry – A European Journal, EarlyView.
A fully noble‐metal‐free photocatalytic system that couples cobaloxime catalysis with Cu photosensitizer for HAT‐driven acetylene‐to‐ethylene conversion is reported. ABSTRACT The purification of ethylene streams from acetylene impurities remains a key industrial challenge, for which light‐powered strategies are emerging as sustainable alternatives to ...
Anna Fortunato, Sharon Silloni, Brando Adranno, Marianna Barbieri, Luka Đorđević, Francesca Arcudi   +5 more
wiley   +1 more source

Multi-scalar Analysis of a Southern African Assemblage: The Middle Stone Age at Ha Makotoko, Lesotho. [PDF]

J Paleolit Archaeol
Siemssen T, Arthur C, Dewar G, Lombard M, Mitchell P.   +4 more
europepmc   +1 more source

Cation‐Directed Host–Guest Assembly and Reversible Wheel to Cluster Interconversion in a 20‐Molybdate System

Chemistry – A European Journal, EarlyView.
The polyoxo‐20‐molybdate(VI) wheel [MoVI20O60{AsO2(CH3)2}12]12− (Mo20) can be prepared with or without a central guest in a controlled, cation‐directed fashion. When Mo20 is dissolved in water, it exhibits an immediate, quantitative, and fully reversible solution transformation to a tetranuclear Mo4 cluster, which transforms in the solid state again to
Arun Pal, Alisher Kuanysh, Vinaya Siby, Jana Hölscher, Nikolai Kuhnert, Albert Masip‐Sánchez, Xavier López, Josep M. Poblet, Maria Boltoeva, Pierre Bauduin, Mohamed Haouas, Emmanuel Cadot, Ulrich Kortz   +12 more
wiley   +1 more source

Initial Conditions of Planet Formation: Time Constraints from Small Bodies and the Lifetime of Reservoirs in the Solar Protoplanetary Disk. [PDF]

Space Sci Rev
Schönbächler M, Bouvier A, Kita NT, Kruijer TS.   +3 more
europepmc   +1 more source

The Role of Iron‐Hyponitrite Intermediates in Biology and Insights From Synthetic Model Complexes

Chemistry – A European Journal, EarlyView.
Despite the difference in active site architecture, NO reduction by different NOR enzymes is expected to be linked by a common intermediate: hyponitrite (N2O22−). However, experimentally, very little is known about the coordination chemistry of iron with hyponitrite and the expected Fe‐hyponitrite intermediates.
Michael O. Lengel, Nicolai Lehnert
wiley   +1 more source

Climate-carbon-cycle interactions and spatial heterogeneity of the late Triassic Carnian pluvial episode. [PDF]

Nat Commun
Zhao X, Xue N, Yang H, Zheng D, Peng J, Frieling J, De Vleeschouwer D, Fu X, Jia W, Fang Y, Li S, Wang M, Zhao X, Wang Q, Zhang H, Sha J, Jenkyns HC, Claeys P, Wang B.   +18 more
europepmc   +1 more source

Analytical Methods for Os Isotope Ratios and Re-PGE Mass Fractions in Geological Samples. [PDF]

Front Chem, 2020
Chu Z.
europepmc   +1 more source

Spotlight on the Nucleotide: Solid‐State NMR for the Investigation of ATP Hydrolysis in the ATPase SmsC

Chemistry – A European Journal, EarlyView.
Nucleotide‐detected solid‐state NMR has been applied to probe nucleotide conformations and dynamics during ATP hydrolysis using the dimeric P‐loop ATPase SmsC as a model protein. The different stages of ATP hydrolysis have been mimicked by ATP analogues for which different degrees of conformational heterogeneity have been observed. ABSTRACT Solid‐state
Nina Wehr, Laure Decamps, Julius Schlüter, Koen Linssen, Georg Künze, Kushal Sengupta, Serena DeBeer, Thomas Wiegand   +7 more
wiley   +1 more source

Evidence from Buhais Rockshelter for human settlement in Arabia between 60,000 and 16,000 years ago. [PDF]

Nat Commun
Bretzke K, Kim S, Jasim SA, Yousif E, Preusser F, Preston GW, Pallottino F, Parker AG.   +7 more
europepmc   +1 more source