Results 121 to 130 of about 273,322 (239)
Chemistry – A European Journal, EarlyView.Easily synthesized [Ge([12]crown‐4)2][OTf]2 catalyzes the hydrosilylation of aldehydes to give reductively coupled ethers via a carbonyl‐activated reaction pathway. The mechanism proceeds through two distinct steps: hydrosilylation followed by etherification. The open coordination face of the active cationic Ge(II) catalyst facilitates the coordination
Sarah L. McOnie +2 more
wiley +1 more source
, 2010 The size of macromolecular structures that can be solved by nuclear magnetic resonance (NMR) spectroscopy has dramatically increased over the years in the evolution of stable isotope labeling methods.
Spettel, Karen Elizabeth
core +1 more source
Chemistry – A European Journal, EarlyView.Two previously uncharacterized heterocyclic imines, 3‐iminooxetane and 3‐oxazoline, are generated simultaneously by irradiation of 3‐azidooxetane under matrix isolation conditions. The infrared spectra provide reference data for future gas‐phase studies and may facilitate their search in the interstellar medium.
Mika Maehara +4 more
wiley +1 more source
Downstream labeling and upstream price competition [PDF]
The paper analyses the economic consequences of labeling in a setting with two vertically related markets. Labeling on the downstream market affects upstream price competition through two effects : a differentiation effect and a ranking effect.
Bonroy, O., Lemarié, S.
core
Edge Fluid Turbulence Simulations of Stellarators With GRILLIX
Contributions to Plasma Physics, EarlyView.ABSTRACT The edge fluid turbulence code GRILLIX has recently been extended from axisymmetric tokamak geometries to support 3D stellarator configurations. Following successful proof‐of‐principle simulations published in Stegmeir et al., we present here a comprehensive simulation of the Wendelstein 7‐AS stellarator.
Andreas Stegmeir +4 more
wiley +1 more source
Drug Testing and Analysis, EarlyView.This method enables simultaneous carbon isotope confirmation of 6‐oxo‐androstenedione and testosterone markers from a single urine aliquot, using bench‐top extraction, two preparative HPLC steps with intermediate acetylation, and GC/C/IRMS analysis. It was fully validated according to WADA requirements, and real samples demonstrated its fitness for ...
Fábio Azamor de Oliveira +7 more
wiley +1 more source
Applications of partial metabolic deuterium oxide labeling to lipidomics
, 2019 In most quantitative mass spectrometry (MS), complete labeling of target analytes with heavy isotopes is designed for simple distinction of isotope-labeled compounds from unlabeled counterparts in a mass spectrum.
Kim, Jonghyun +2 more
core
EcoEnergy, EarlyView.Concentrated NaClO4 dynamically reconstructs interfacial hydrogen‐bond networks during CO2 electroreduction, restricting proton transport and stabilizing CO‐derived intermediates. Multinuclear NMR, infrared spectroscopy, and simulations reveal electrolyte‐mediated electric‐double‐layer regulation, which suppresses hydrogen evolution and enhances C–C ...
Hang Zhou +7 more
wiley +1 more source
European Journal of Inorganic Chemistry, EarlyView.Rollover cyclometalation is a distinctive variant of classical cyclometalation where a chelated heterocyclic ligand undergoes internal rotation, releasing one donor atom from coordination and subsequently activating a remote C─H bond with high regioselectivity.
Antonio Zucca, Maria I. Pilo
wiley +1 more source
Metabolomic insights for the authentication and traceability of antibiotic‐free pork: a pilot study
Journal of the Science of Food and Agriculture, EarlyView.Abstract BACKGROUND Antibiotic‐free production within the meat supply chain is a source of concern since new voluntary label claims need to be authenticated to prevent fraud. Therefore, an untargeted 1H NMR‐based metabolomics approach coupled to unsupervised (principal component analysis) and supervised (orthogonal partial least squares discriminant ...
Maria Olga Varrà +8 more
wiley +1 more source