Comment on recent article “Extraction, structural analysis, derivatization and antioxidant activity of polysaccharide from chinese yam”, published in food chemistry (2021): the need to consider residue ethanol solvent signals in the NMR spectra interpretation of polysaccharides

2021 ◽  
pp. 130867
Author(s):  
Zhipeng Huo ◽  
Jiefeng Tian
Keyword(s):  
Antioxidant Activity ◽  
Structural Analysis ◽  
Recent Article ◽  
Nmr Spectra ◽  
Food Chemistry ◽  
Chinese Yam

scholarly journals Computer-assisted structural analysis of organic compounds from 13C-NMR spectra.

1994 ◽  
Vol 43 (7) ◽  
pp. 517-524
Author(s):  
Keiji SAITO ◽  
Yoshiaki ISHIDA ◽  
Tokio OOSHIMA
Keyword(s):  
Structural Analysis ◽  
Organic Compounds ◽  
13C Nmr ◽  
Nmr Spectra ◽  
Computer Assisted ◽  
13C Nmr Spectra

scholarly journals The extent of B-form structure in a 6S RNA variant that mimics DNA to bind to the Escherichia coli RNA Polymerase

2018 ◽  
Author(s):  
Nilesh K. Banavali
Keyword(s):  
Escherichia Coli ◽  
Nucleic Acid ◽  
Structural Analysis ◽  
Rna Polymerase ◽  
Rna Structure ◽  
Recent Article ◽  
Single Strand ◽  
Bacterial Rna ◽  
6S Rna

AbstractIn a recent article by Darst and coworkers, it was found that a non-coding 6S RNA variant regulates a bacterial RNA polymerase by mimicking B-Form DNA, and a few different nucleic acid duplex parameters were analyzed to understand the extent of B-form RNA structure. In this manuscript, a different structural analysis based on conformational distance from canonical A-form and B-form single-strand structures is presented. This analysis addresses the occurrence and extent of both local and global B-form structure in the published 6S RNA variant model.

Structural Analysis of Proanthocyanidins Isolated from Fruit Stone of Chinese Hawthorn with Potent Antityrosinase and Antioxidant Activity

2013 ◽  
Vol 62 (1) ◽  
pp. 123-129 ◽  
Author(s):  
Wei-Ming Chai ◽  
Chih-Min Chen ◽  
Yu-Sen Gao ◽  
Hui-Ling Feng ◽  
Yu-Mei Ding ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Structural Analysis ◽  
Fruit Stone

Structural analysis of lanthanum-containing battery materials using 139La solid-state NMR

2011 ◽  
Vol 89 (9) ◽  
pp. 1105-1117 ◽  
Author(s):  
Leigh Spencer ◽  
Eric Coomes ◽  
Eric Ye ◽  
Victor Terskikh ◽  
Adam Ramzy ◽  
...  
Keyword(s):  
Solid State ◽  
Structural Analysis ◽  
Lithium Ion Battery ◽  
Solid State Nmr ◽  
Nmr Spectra ◽  
Lithium Ion ◽  
Atomic Level ◽  
Coupling Constants ◽  
Battery Materials ◽  
Quadrupolar Coupling

139La solid-state NMR spectra, acquired at 21.1 and 11.7 T, have been used to evaluate the structural properties of the lithium ion battery materials, La32Li16Fe6.4O67 and Li3xLa2/3–xTiO3. In particular, atomic-level disorder in the second coordination sphere environment of lanthanum in these materials has been indicated by the observation of a distribution in the asymmetry parameters and the quadrupolar coupling constants derived from experimental NMR spectra, and supported by theoretical calculations. For comparison, 139La NMR has been obtained for the two model compounds La2O3 and LaNbO4, in which there is no atomic-level disorder. Quadrupolar coupling constants in the range of 17 to 59 MHz have been measured, and these values are supported by previous work as well as theoretical predictions performed in CASTEP. It has been shown that 139La NMR is a useful tool for the structural analysis of lithium ion battery materials, and when combined with 7Li MAS NMR and powder X-ray diffraction, can be used to determine the structure of complex solid-state electrolyte and electrode materials.

scholarly journals Structural Analysis of Pyridine Extract of Nakayama Lignite by 13C-and 1H-NMR Spectra

1980 ◽  
Vol 59 (9) ◽  
pp. 723-731
Author(s):  
Kiyoshi MASHIMO ◽  
Kyoya AKAMATSU ◽  
Tohru WAINAI
Keyword(s):  
Structural Analysis ◽  
1H Nmr ◽  
Nmr Spectra ◽  
1H Nmr Spectra
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