Results 271 to 280 of about 1,362,496 (337)

1H-NMR-Spektroskopie

Spektroskopische Daten zur Strukturaufklärung organischer Verbindungen, 2001
Ernö Pretsch, Philippe Bühlmann, Christian Affolter, Martin Badertscher   +3 more
openaire   +2 more sources

Refining Universal Procedures for Ammonium Quantification via Rapid 1H NMR Analysis for Dinitrogen Reduction Studies

, 2020
As research on sustainable ammonia synthesis via electrochemical and photochemical N2 reduction progresses to include a wider variety of aqueous and aprotic electrolytes, 1H NMR spectroscopy is inc...
Rebecca Y. Hodgetts, A. Kiryutin, P. Nichols, H. Du, Jacinta M. Bakker, D. Macfarlane, A. Simonov   +6 more
semanticscholar   +1 more source

1H NMR-based metabolic characterization of Chinese Wuding chicken meat.

Food Chemistry, 2019
The aim of this study was to evaluate the chemical composition of precursor flavor substance of Wuding chicken with the age of 110, 140, 170, 200 and 230 days. The metabolic composition of chicken meat was studied using 1H nuclear magnetic resonance (NMR)
Zhichao Xiao, C. Ge, G. Zhou, Wangang Zhang, G. Liao   +4 more
semanticscholar   +1 more source

1H NMR combined with PLS for the rapid determination of squalene and sterols in vegetable oils.

Food Chemistry, 2019
Proton nuclear magnetic resonance (1H NMR) combined with partial least squares (PLS) was developed for the rapid determination of squalene and sterols (brassicasterol, campesterol, stigmasterol and β-sitosterol) in 119 vegetable oils from 7 different ...
Tingting Shi, Mengting Zhu, Xingyu Zhou, Xi Huo, You Long, Xian-Yu Zeng, Yi Chen   +6 more
semanticscholar   +1 more source

1H‐NMR Microscopy of Tablets *

Journal of Pharmaceutical Sciences, 1995
A 1H-nuclear magnetic resonance (NMR) microscopy method was utilized for the first time to determine the porosity distribution of physically intact tablets. The main advantage of this newly developed method was that porosity cross sections through whole tablets or specific locations could be obtained without mechanically destroying the tested tablet ...
G, Nebgen, D, Gross, V, Lehmann, F, Müller   +3 more
openaire   +2 more sources

1H NMR-based fingerprinting of eleven Mexican Capsicum annuum cultivars.

Food Research International, 2019
Approximately 90% of the chili peppers consumed in the world are harvested in Mexico. The present article describes the untargeted 1H NMR-based metabolomic profiling of 11 cultivars of Capsicum annuum species which are routinely consumed worldwide.
Elideth Florentino-Ramos, N. Villa‐Ruano, Diego Hidalgo-Martínez, Moisés Ramírez-Meraz, R. Méndez-Aguilar, R. Velásquez-Valle, L. G. Zepeda-Vallejo, Nury Pérez-Hernández, Elvia Becerra-Martínez   +8 more
semanticscholar   +1 more source

Characterization of heroin samples by 1H NMR and 2D DOSY 1H NMR

Forensic Science International, 2014
Twenty-four samples of heroin from different illicit drug seizures were analyzed using proton Nuclear Magnetic Resonance ((1)H NMR) and two-dimensional diffusion-ordered spectroscopy (2D DOSY) (1)H NMR. A careful assignment and quantification of (1)H signals enabled a comprehensive characterization of the substances present in the samples investigated:
Stéphane, Balayssac, Emmanuel, Retailleau, Geneviève, Bertrand, Marie-Pierre, Escot, Robert, Martino, Myriam, Malet-Martino, Véronique, Gilard   +6 more
openaire   +2 more sources

Computational 1H NMR: Part 1. Theoretical background

Magnetic resonance in chemistry : MRC, 2019
This is the first one of the three closely interrelated reviews to be published in Magnetic Resonance in Chemistry dealing with accordingly theoretical background, chemical applications, and biochemical studies of and by means of computational 1H NMR ...
L. Krivdin
semanticscholar   +1 more source

1H-NMR and 77Se-NMR in CsHSeO4

Solid State Ionics, 2005
Abstract Measurements of 1 H-NMR and 77 Se-NMR have been conducted with CsHSeO 4 , in order to clarify dynamics of proton and SeO 4 tetrahedron which is related to transport of proton below and above T c  = 401 K. An NMR absorption line is observed in 1 H-NMR measurement and its line width decreases with increasing temperature below T c , due
Yukihiko Yoshida, Yasumitsu Matsuo, Seiichiro Ikehata   +2 more
openaire   +1 more source

1H-NMR characterization of cucumber peroxidases

Biochimica et Biophysica Acta (BBA) - Protein Structure and Molecular Enzymology, 1991
Two peroxidase isoenzymes from Cucumber seedlings, one acidic (pI = 4) and one basic (pI = 9), were characterized by 1H-NMR spectroscopy. The NMR spectra were obtained in the native (ferric high-spin) and cyanide ligated (ferric low-spin) forms of both isoenzymes. The NMR spectral comparison of paramagnetically shifted resonances with those of the well
L B, Dugad, H M, Goff, F B, Abeles
openaire   +2 more sources