Results 131 to 140 of about 6,045 (297)

Hydrogen Bond Mediated Dioxygen Activation in a Manganese Guanidine Complex

Zeitschrift für anorganische und allgemeine Chemie, EarlyView.
The guanidine arms of [Mn(DIG3tren)]2+ provide the reducing equivalents and H‐bonding stabilization necessary for the bimolecular activation of O2 to form a mixed valent MnIII(m‐O)2MnIV species. A high‐spin manganese(II) complex supported by a guanidine‐based DIG3tren (tris(N’, N”‐diisopropylguanidinyl‐2‐ethyl)amine) ligand has been synthesized and ...
Matthias Jux, Kallol Ray
wiley   +1 more source

Guanidines encapsulated in zeolite Y and anchored to MCM-41: synthesis and catalytic activity

, 2015
The preparation and characterisation of guanidines encapsulated in zeolite Y and anchored to MCM-41 are described. The catalytic activity of the immobilised and free guanidines were tested in the aldol reaction of benzaldehyde with acetone.
Sercheli, R, Vargas, RM, Schuchardt, U, Sheldon, RA   +3 more
core   +1 more source

European Society of Contact Dermatitis Guideline for Diagnostic Patch Testing—Recommendations on Best Practice (Update 2026)

Contact Dermatitis, EarlyView.
ABSTRACT The present guideline updates the initial ESCD patch testing guideline, summarizing all aspects of patch testing for the diagnosis of contact allergy in patients suspected of suffering, or having been suffering, from allergic contact dermatitis or other delayed‐type hypersensitivity skin and mucosal conditions. Sections with brief descriptions
Wolfgang Uter, Olivier Aerts, Tove Agner, Richard Brans, Magnus Bruze, Alicia Cannavó, Marie‐Noёlle Crépy, Ana M. Giménez‐Arnau, Margarida Gonçalo, An Goossens, Swen M. John, Carola Lidén, Suzana Ljubojević Hadžavdić, Vera Mahler, Mihaly Matura, Esen Özkaya, Maria Pesonen, Nadia Raison‐Peyron, Thomas Rustemeyer, Radoslaw Spiewak, Luca Stingeni, Ian R. White, S. Mark Wilkinson, Jeanne Duus Johansen   +23 more
wiley   +1 more source

Copper-Catalyzed Oxidative Three-Component Synthesis of N, N′,N″‑Trisubstituted Guanidines

, 2016
A copper-catalyzed three-component synthesis of trisubstituted N-aryl guanidines involving cyanamides, arylboronic acids, and amines has been developed. This operationally simple oxidative process, which is performed in the presence of K2CO3, a catalytic
Jihui Li (1580890), Luc Neuville (1580893)   +1 more
core   +1 more source

Insights into the catalytic mechanism of formate dehydrogenases from different microbial sources

The FEBS Journal, EarlyView.
This integrated study combines experimental enzyme kinetics with QM/MM simulations to map the catalytic mechanisms of four formate dehydrogenases at the atomic level. This approach reveals the key determinants of catalytic efficiency and guides the rational design of biocatalysts for effective CO2 reduction—a crucial step towards sustainable ...
Laura Legnani, Marco Gargiulo, Elia Lio, Enrico Mario Alessandro Fassi, Giovanni Grazioso, Maria Assunta Chiacchio, Barış Binay, Stefania Brocca, Francesco Secundo   +8 more
wiley   +1 more source

Guanidines as Reagents in Proton-Coupled Electron-Transfer Reactions and Redox Catalysts

, 2018
Redox-active guanidines are ideal proton-coupled electron-transfer (PCET) reagents, since they combine a high Brønsted basicity with a low and tunable redox potential.
Hans-Jörg Himmel
core   +1 more source

Degradomics for large‐scale mechanistic insights on proteases and proteolysis in human health

The FEBS Journal, EarlyView.
Proteolysis has an important role in human disease but remains relatively unexplored. Degradomics, the uncovering of proteolysis in tissues, cells, and proteins, uses mass spectrometry‐based terminomics to identify protein termini occurring therein (forward degradomics) and to define the actions of proteases (reverse degradomics).
Daniel R. Martin, Sumit Bhutada, Suneel S. Apte   +2 more
wiley   +1 more source

Crystal structures of sulfonamide protected bicyclic guanidines: (S)-8-{[(tert-butyldimethylsilyl)oxy]methyl}-1-[(2,2,4,6,7-pentamethyl-2,3-dihydrobenzofuran-5-yl)sulfonyl]-1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-a]pyrimidin-1-ium trifluoromethanesulfonate and (S)-8-(iodomethyl)-1-tosyl-1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-a]pyrimidin-1-ium iodide

Acta Crystallographica Section E: Crystallographic Communications
Two compounds, (S)-8-{[(tert-butyldimethylsilyl)oxy]methyl}-1-[(2,2,4,6,7-pentamethyl-2,3-dihydrobenzofuran-5-yl)sulfonyl]-1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-a]pyrimidin-1-ium trifluoromethanesulfonate, C27H46N3O4SSi+·CF3O3S−, (1) and (S)-8 ...
Jamal M. H. Alaboosh, Steven P. Hill, Benson M. Kariuki, James E. Redman   +3 more
doaj   +1 more source

New Cellulose-Supported Reagent:  A Sustainable Approach to Guanidines

, 2016
A new cellulose-supported reagent for the synthesis of guanidine in aqueous medium is reported starting from commercially available functionalized cellulose beads.
Alessandra Chighine (2365555), Giampaolo Giacomelli (2037643), Andrea Porcheddu (1555003), Simonetta Masala (2699065)   +3 more
core   +1 more source

Physicochemical Quality and Chemical Safety of Commercial Wet Cat Food: Composition, Oxidation, Biogenic Amines, and Trace Elements

Journal of Animal Physiology and Animal Nutrition, EarlyView.
ABSTRACT This study investigated the physicochemical characteristics and chemical safety of commercial wet cat foods marketed in Brazil. Twenty products labeled as beef, chicken and fish flavors were analyzed for proximate composition, pH, lipid and protein oxidation, biogenic amines, and essential and potentially toxic trace elements.
Marina Teixeira de Vries Mársico, Eliane Teixeira Mársico, Celso Fasura Balthazar, João Paulo de Sá Felizardo, Roberto Meigikos dos Anjos, Erick Almeida Esmerino, Sérgio Borges Mano   +6 more
wiley   +1 more source