Comparison Among MIR, NIR, and LF-NMR Techniques for Quality Control of Jam Using Chemometrics

2018 ◽  
Vol 11 (7) ◽  
pp. 2029-2034 ◽  
Author(s):  
Poliana M. Santos ◽  
Luiz Alberto Colnago
Soft Matter ◽  
2021 ◽  
Author(s):  
Yahui Li ◽  
Junsheng Yang ◽  
Hong Cheng ◽  
Linkun Cai ◽  
Ke Ye ◽  
...  

The network structure in the amorphous domain of swollen iodine-doped poly (vinyl alcohol) (PVA) were systematically investigated by low-field (LF) NMR techniques to reveal the PVA-iodine complex formation mechanism. Three...


2015 ◽  
Vol 407 (7) ◽  
pp. 1937-1949 ◽  
Author(s):  
Mohamed A. Farag ◽  
Andrea Porzel ◽  
Engy A. Mahrous ◽  
Mo’men M. El-Massry ◽  
Ludger A. Wessjohann

2021 ◽  
Vol 14 (11) ◽  
pp. 1152
Author(s):  
Qian Zhang ◽  
Niara Moura Porto ◽  
Carolina Carvalho Guilhon ◽  
Thais Biondino Sardella Giorno ◽  
Daniela Sales Alviano ◽  
...  

Elsholtzia ciliata (Thunb.) Hyl, family Lamiaceae, is an important and popular anti-bacterial and anti-inflammatory Traditional Chinese Medicine (TCM). However, there are limited scientific studies on its anatomy and pharmacological activities. Moreover, the information of chemical constituents in relation to its non-volatile constituents are still missing. The current study aimed to evaluate the anatomic, pharmacological and phytochemical profile of Elsholtzia ciliata, providing means for the quality control of this herbal drug. The methodology designed for this study included the preparation of anatomic sections and their description, extraction, chromatography, structural elucidation of isolated compounds by NMR techniques and their quantification by HPLC using pharmacological assays (Formalin, hot plate, DPPH, antimicrobial-Gram positive, Gram Negative and fungus, and MTT assays) to confirm the activities described for this species. Results of the anatomic study are aligned with the pattern expected for plants belonging to the Lamiaceae family; Ursolic acid and Oroxylin were isolated from this plant species. The findings observed in this study indicate that Elsholtzia ciliata possess anti-inflammatory, antinociceptive, antioxidant, antimicrobial and anticancer activities. The chemical compounds isolated from its leaves and the anatomy profile of its parts provide the basis for further quality control for this plant.


2021 ◽  
Vol 8 ◽  
Author(s):  
Ye Tian ◽  
Xiao-Meng Chong ◽  
Ying Liu ◽  
Ying Han ◽  
Chang-Qin Hu ◽  
...  

In this study, two isomeric impurities were identified in cefotiam hydrochloride injection preparation and were characterized. Column-switching HPLC-MS and NMR techniques were used to identify the impurity 1 as the Δ3(4) isomers of cefotiam. Using software-based calculations, it was predicted that neither of the isomeric impurities was embryotoxic. This study provides a reference for the production, storage, and quality control of cefotiam and related cephalosporin antibiotics.


Author(s):  
W.A. Jacob ◽  
R. Hertsens ◽  
A. Van Bogaert ◽  
M. De Smet

In the past most studies of the control of energy metabolism focus on the role of the phosphorylation potential ATP/ADP.Pi on the regulation of respiration. Studies using NMR techniques have demonstrated that the concentrations of these compounds for oxidation phosphorylation do not change appreciably throughout the cardiac cycle and during increases in cardiac work. Hence regulation of energy production by calcium ions, present in the mitochondrial matrix, has been the object of a number of recent studies.Three exclusively intramitochondnal dehydrogenases are key enzymes for the regulation of oxidative metabolism. They are activated by calcium ions in the low micromolar range. Since, however, earlier estimates of the intramitochondnal calcium, based on equilibrium thermodynamic considerations, were in the millimolar range, a physiological correlation was not evident. The introduction of calcium-sensitive probes fura-2 and indo-1 made monitoring of free calcium during changing energy metabolism possible. These studies were performed on isolated mitochondria and extrapolation to the in vivo situation is more or less speculative.


2003 ◽  
Vol 118 (3) ◽  
pp. 193-196 ◽  
Author(s):  
Jeffrey W McKenna ◽  
Terry F Pechacek ◽  
Donna F Stroup

1971 ◽  
Vol 127 (1) ◽  
pp. 101-105 ◽  
Author(s):  
L. L. Weed

2009 ◽  
Author(s):  
Morris Goldsmith ◽  
Larry L. Jacoby ◽  
Vered Halamish ◽  
Christopher N. Wahlheim

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