Results 101 to 110 of about 9,719 (242)

High Hydrogen Isotope Concentrations Observed in CANDU Rolled Joints

Journal of Nuclear Engineering
High concentrations of hydrogen isotopes have been observed at the ends of CANDU Zr-2.5Nb pressure tubes in the region associated with the rolled joints with 403 stainless steel end fittings.
Glenn A. McRae, Christopher E. Coleman
doaj   +1 more source

Strain Engineering via W–O–Ru Interfacial Coupling to Suppress Lattice Oxygen Activation for Stable Acidic Water Electrolysis

Angewandte Chemie, EarlyView.
Constructing atomically coupled W–O–Ru interfacial units on RuO2 triggers a dynamic strain evolution during the oxygen evolution reaction. An initial tensile strain secures structural stability, while a self‐adjusting transition to interfacial compression optimizes catalytic activity.
Yi Guan, Xiaozhang Yao, Ruiwen Qi, Xiangzhong Ren, Gaowa Liu, Zhongxin Song, Lei Zhang, Xueliang Sun   +7 more
wiley   +2 more sources

Guidelines for Sample Preparation and Stable Isotope Analysis of Food for Traceability Studies

Food Safety and Health
Stable isotope analysis is a powerful and increasingly applied tool for food traceability, enabling high‐confidence determination of origin, production practices, and authenticity. This guideline provides practical recommendations for the preparation and
Bayan Nuralykyzy, Syed Abdul Wadood, Jing Nie, Hanyi Mei, Shengzhi Shao, Yongzhi Zhang, Chunlin Li, Yuwei Yuan, Karyne M. Rogers   +8 more
doaj   +1 more source

Water, Alcohols, Amines, and Amides as Formal Hydrogen‐Atom‐Transfer Reagents Through Activation With Redox‐Active Lewis Acids

Angewandte Chemie, EarlyView.
Protic molecules containing strong O─H or N─H bonds typically resist hydrogen‐atom abstraction because of the high reactivity of the resulting heteroatom‐centered radicals. However, association of the protic molecules with redox‐active Lewis acids can provide powerful hydrogen‐atom donors or proton‐coupled‐electron‐transfer reagents.
Petra Vojáčková, Armido Studer
wiley   +2 more sources

Vapor hydrogen and oxygen isotopes reflect water of combustion in the urban atmosphere. [PDF]

Proc Natl Acad Sci U S A, 2015
Gorski G, Strong C, Good SP, Bares R, Ehleringer JR, Bowen GJ.   +5 more
europepmc   +1 more source

Borylcyclopropanes: Synthetic Strategies and Applications

Angewandte Chemie, EarlyView.
Borylcyclopropanes (cyclopropanes bearing a boron substituent) sit at the intersection of two privileged frameworks in synthesis. This review provides the first exhaustive survey of their chemistry, spanning metal–carbene, nucleophilic cyclization, radical, hydroboration, and C─H activation routes, and documenting applications in medicinal chemistry ...
Aiza A. Butt, Joseph M. Ready
wiley   +2 more sources

Water‐Dispersible Ruthenium Nanocatalyst for Carbonyl Reduction With D2 or T2 in Aqueous Media

Angewandte Chemie, EarlyView.
We report the synthesis and characterization of water‐dispersible ruthenium nanoparticles that catalyze the reductive deuteration and tritiation of carbonyl compounds in aqueous media, enabling efficient access to a broad range of isotopically labeled polar molecules, including cyclic peptides, antibody‐drug conjugate linkers, pegylated derivatives ...
Elisa Martinelli, Rafael Jiménez Rioboo, Remo Weck, Sophie Feuillastre, Luis M. Martínez‐Prieto, Grégory Pieters, Volker Derdau   +6 more
wiley   +2 more sources

Cobalt‐Catalyzed Radical Ligand Transfer (RLT) Enables Remote‐Markovnikov Hydroamination of Alkenes

Angewandte Chemie, EarlyView.
A cobalt‐catalyzed remote‐Markovnikov 1,3‐hydroamination of allyl carboxylates proceeds through MHAT, 1,2‐radical acyloxy migration (1,2‐RAM), and radical ligand transfer (RLT) from a Co‐N intermediate, providing protected amino alcohols. ABSTRACT Amino alcohols are prevalent in pharmaceuticals, agrochemicals, and functional materials, yet ...
Arman Khosravi, Ho Martin Yuen, Seth Fremin, Nuwan A. Pannilawithana, Nol Supasueb, Yu Zhang, Peng Liu, Ming‐Yu Ngai   +7 more
wiley   +2 more sources

Synergy Between Photon‐to‐Phonon Pathway and Active Lattice Oxygen Enables Efficient and Stable Syngas Synthesis

Angewandte Chemie, EarlyView.
This work reports the design of a multifunctional MnOx support coupled with classic Rh catalytic centers for light‐driven dry reforming of methane. Benefiting from efficient photon‐to‐phonon conversion pathway and a dynamic OL‐OV cycle, the catalyst achieves high syngas production rates and light‐to‐chemical energy efficiency without external heating ...
Chengzhi Guo, Apoorv Jain, Junrun Feng, Xinyu Li, Xinru Li, Shuya Jia, Juncong Wang, Leirun Chen, Xinjie Luo, Xiaolei Zhang, Xiyi Li, Yang Lan   +11 more
wiley   +2 more sources

Dual Activation of H2 and CO2 by a Pincer‐Type Ni–Zn Heterobimetallic Complex

Angewandte Chemie, EarlyView.
A bimetallic Ni−Zn complex performs sequential activations of H2 (1 equiv) and CO2 (2 equiv). This bimetallic cooperativity is attributed to the weak Lewis acidic nature of Zn(II), which promotes fluxional ligand binding. Namely, an X‐type ligand at Ni, where X is hydride or formate, toggles between two different binding modes: bridging Zn(μ‐X)Ni and ...
Krishnendu Dey, Matthias Borowski, Gregor Schnakenburg, Connie C. Lu   +3 more
wiley   +2 more sources