The State of Asymmetric Nitride Clusters in Endohedral Fullerenes as Studied by 14N NMR Spectroscopy: Experiment and Theory

2011 ◽  
Vol 115 (31) ◽  
pp. 15257-15265 ◽  
Author(s):  
Alexey A. Popov ◽  
Sandra Schiemenz ◽  
Stanislav M. Avdoshenko ◽  
Shangfeng Yang ◽  
Gianaurelio Cuniberti ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
The State ◽  
Endohedral Fullerenes ◽  
Spectroscopy Experiment ◽  
14N Nmr

Quantification of Chlorogenic Acid and Hyperoside Directly from Crude Blueberry (Vaccinium angustifolium) Leaf Extract by NMR Spectroscopy Analysis: Single-Laboratory Validation

2012 ◽  
Vol 95 (5) ◽  
pp. 1406-1411 ◽  
Author(s):  
Joshua M Hicks ◽  
Asim Muhammad ◽  
Jonathan Ferrier ◽  
Ammar Saleem ◽  
Alain Cuerrier ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Chlorogenic Acid ◽  
Mesh Size ◽  
Array Detector ◽  
Spectroscopy Analysis ◽  
Vaccinium Angustifolium ◽  
Spectroscopy Experiment ◽  
Tube Type ◽  
Significant Interference ◽  
Single Laboratory

Abstract A single-laboratory-validated NMR spectroscopy method was established for determining the quantity of chlorogenic acid and hyperoside from crude extract material of blueberry leaves of the species Vaccinium angustifolium var. laevifolium House. The calibration curve of chlorogenic acid showed a highly linear regression, R = 0.99998. NMR spectroscopy identification and quantification of the constituents directly from the mixture, within the error of HPLC-diode array detector analysis, were determined as 7.53 mM chlorogenic acid (64.0 mg chlorogenic acid/g powdered leaf) and 0.77 mM hyperoside (8.58 mg hyperoside/g powdered leaf). The LOD was calculated to be 0.01 mM and the LOQ 0.01 mM by the 9 min and 13 s NMR spectroscopy experiment utilized. The assay showed no significant interference from different field strengths, extraction mesh size, gravimetric scale precision, NMR spectroscopy tube type, pulse program, amount of starting dry material, or day-to-day operation. The robustness of NMR spectroscopy as a means of definitively monitoring chlorogenic acid and hyperoside content directly from crude extracts was demonstrated by Youden statistical analysis.

14N NMR Spectroscopy of Nitrate Co-ions in Ionomer Membranes

1997 ◽  
Vol 30 (15) ◽  
pp. 4357-4362 ◽  
Author(s):  
M. Rankothge ◽  
J. Hook ◽  
L. van Gorkom ◽  
G. Moran
Keyword(s):  
Nmr Spectroscopy ◽  
Ionomer Membranes ◽  
14N Nmr

scholarly journals Flow reactors integrated with in-line monitoring using benchtop NMR spectroscopy

2018 ◽  
Vol 3 (4) ◽  
pp. 399-413 ◽  
Author(s):  
Patrick Giraudeau ◽  
François-Xavier Felpin
Keyword(s):  
Nmr Spectroscopy ◽  
State Of The Art ◽  
Emerging Technology ◽  
The State ◽  
Flow Reactors

The state-of-the-art flow reactors integrated with in-line benchtop NMR are thoroughly discussed with highlights on the strengths and weaknesses of this emerging technology.

A Heteronuclear Direct-Detection NMR Spectroscopy Experiment for Protein-Backbone Assignment

2004 ◽  
Vol 116 (17) ◽  
pp. 2307-2309 ◽  
Author(s):  
Ivano Bertini ◽  
Luminita Duma ◽  
Isabella C. Felli ◽  
Michael Fey ◽  
Claudio Luchinat ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Direct Detection ◽  
Backbone Assignment ◽  
Protein Backbone ◽  
Spectroscopy Experiment ◽  
Protein Backbone Assignment

Determination of the State of Water in Hydrated Cement Phases Using Deuterium NMR Spectroscopy

1998 ◽  
Vol 120 (25) ◽  
pp. 6415-6416 ◽  
Author(s):  
Edward F. Rakiewicz ◽  
Alan J. Benesi ◽  
Michael W. Grutzeck ◽  
Stephen Kwan
Keyword(s):  
Nmr Spectroscopy ◽  
The State ◽  
Deuterium Nmr ◽  
Hydrated Cement ◽  
State Of Water

In Situ Observation of Photoswitching by NMR Spectroscopy: A Photochemical Analogue to the Exchange Spectroscopy Experiment

2019 ◽  
Vol 91 (17) ◽  
pp. 11367-11373 ◽  
Author(s):  
Eduard Stadler ◽  
Sebastian Tassoti ◽  
Pascal Lentes ◽  
Rainer Herges ◽  
Toma Glasnov ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
In Situ Observation ◽  
Exchange Spectroscopy ◽  
Spectroscopy Experiment
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