Results 191 to 200 of about 52,218 (285)

Hydrogen Isotope Exchange in Pyridine Catalyzed by an Iron(II) Imido Complex: Counterion‐Directed Regioselectivity

Angewandte Chemie, EarlyView.
Anionic high‐spin iron(II) imido complexes are catalysts for the hydrogen isotope exchange (HIE) reaction with pyridine as the substrate. The alkali metal counter‐cation plays critical roles in activating the substrate and facilitating deuteration. These complexes catalyze site‐selective α‐, α,β,γ‐, and β,γ‐deuteration of pyridine, where the counter ...
Bin Feng, Guorong Li, Yafei Gao, Nobuyuki Yamamoto, Maren Pink, Qian Peng, Jeremy M. Smith   +6 more
wiley   +2 more sources

Room‐Temperature Gas‐Phase CO2‐to‐C3 Coupling by a 4f‐Aromatic Cluster

Angewandte Chemie, EarlyView.
We engineered a 4f metalla aromatic cluster, PrB2C2−, that enables efficient sequential C−C coupling with CO2 at room temperature, yielding a linear C3 backbone. This system provides a complete theoretical catalytic cycle and establishes a new design principle for lanthanide mediated CO2 activation.
Feng‐Xiang Zhang, Xiao‐Wang Li, Ning‐Zheng Li, Sheng‐Gui He, Yu‐Chen Zhang, Li‐Li Xing, Donald G. Truhlar, Jia‐Bi Ma   +7 more
wiley   +2 more sources

A Novel Light-Induced Collective Circular Movement in <i>Armadillo sordidus</i> Isopods. [PDF]

Ecol Evol
Sheizaf I, Itzkovich E, Chipman AD.
europepmc   +1 more source

Characterization and Phylogenetic Analysis of a Novel Uncultivated Magnetotactic Coccus Harbouring Multi-Chain Magnetosomes. [PDF]

Environ Microbiol Rep
Che Y, Zhang W, Dong Y, Liu M, Xiao T, Zhang JY, Pan H.   +6 more
europepmc   +1 more source

Disruption of the sea turtle magnetic map sense by a magnetic pulse. [PDF]

J Exp Biol
Mackiewicz AG, Glazener AM, Goforth KM, Lim DS, Lohmann CMF, Lohmann KJ.   +5 more
europepmc   +1 more source

Xenon isotopes reveal a geomagnetic prelude to Earth's oxygenation. [PDF]

Natl Sci Rev
Wei Y.
europepmc   +1 more source

Dogs are sensitive to small variations of the Earth's magnetic field. [PDF]

Front Zool, 2013
Hart V, Nováková P, Malkemper EP, Begall S, Hanzal V, Ježek M, Kušta T, Němcová V, Adámková J, Benediktová K, Červený J, Burda H.   +11 more
europepmc   +1 more source

Ultrasound–Calcination Synergistic Control of (Ce, La)PO4 Catalyst Structure for Enhanced Low‐Temperature NH3‐SCR Performance

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT In this study, (Ce, La)PO4 catalysts were synthesized via an ultrasound‐assisted method. The effects of ultrasound duration and calcination temperature on the low‐temperature NH3‐SCR performance were systematically investigated. The results indicated that the (Ce, La)PO4 catalyst prepared with an ultrasound treatment time of 20 min and a ...
Na Li, Kai Yan, Shuning Tan, Ruifang Wang, Zhiyu Zhang   +4 more
wiley   +1 more source

Steepening of inertial Alfvén waves. [PDF]

J Plasma Phys
DesJardin I, Dorelli J, Wilson L, Khazanov G, Shuster J.   +4 more
europepmc   +1 more source

“Hidden” Landscape of Prehistoric Burial Monuments: The Use of Remote Sensing in the Detection of Neolithic Long Barrows in Bohemia (Czech Republic)

Archaeological Prospection, EarlyView.
ABSTRACT Neolithic long barrows are among the earliest monumental structures in Europe, yet in many parts of Central Europe their surface expression has been largely erased by long‐term agricultural activity. This study evaluates the potential of integrated remote sensing approaches for identifying and contextualizing long barrows and associated ...
Petr Krištuf, Tomáš Kroupa, Peter Milo, Jan Havelka, Jan Turek, Martin Gojda   +5 more
wiley   +1 more source