scholarly journals Recent Applications of Mass Spectrometry in the Study of Grape and Wine Polyphenols

2013 ◽  
Vol 2013 ◽  
pp. 1-45 ◽  
Author(s):  
Riccardo Flamini
Keyword(s):  
Mass Spectrometry ◽  
Molecular Weight ◽  
Quality Control ◽  
Structural Characterization ◽  
Antioxidant Activities ◽  
Soft Ionization ◽  
Wine Consumption ◽  
Highly Effective ◽  
Wine Polyphenols

Polyphenols are the principal compounds associated with health benefic effects of wine consumption and in general are characterized by antioxidant activities. Mass spectrometry is shown to play a very important role in the research of polyphenols in grape and wine and for the quality control of products. The soft ionization of LC/MS makes these techniques suitable to study the structures of polyphenols and anthocyanins in grape extracts and to characterize polyphenolic derivatives formed in wines and correlated to the sensorial characteristics of the product. The coupling of the several MS techniques presented here is shown to be highly effective in structural characterization of the large number of low and high molecular weight polyphenols in grape and wine and also can be highly effective in the study of grape metabolomics.

scholarly journals Structural Characterization of a Polysaccharide from Gastrodia elata and Its Bioactivity on Gut Microbiota

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4443
Author(s):  
Jiangyan Huo ◽  
Min Lei ◽  
Feifei Li ◽  
Jinjun Hou ◽  
Zijia Zhang ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Citric Acid ◽  
Gut Microbiota ◽  
Structural Characterization ◽  
Hot Water ◽  
Nmr Analysis ◽  
Gastrodia Elata ◽  
Hot Water Extraction ◽  
Hydroxybenzyl Alcohol

A novel homogeneous polysaccharide named GEP-1 was isolated and purified from Gastrodia elata (G. elata) by hot-water extraction, ethanol precipitation, and membrane separator. GEP-1, which has a molecular weight of 20.1 kDa, contains a polysaccharide framework comprised of only glucose. Methylation and NMR analysis showed that GEP-1 contained 1,3,6-linked-α-Glcp, 1,4-linked-α-Glcp, 1,4-linked-β-Glcp and 1,4,6-linked-α-Glcp. Interestingly, GEP-1 contained citric acid and repeating p-hydroxybenzyl alcohol as one branch. Furthermore, a bioactivity test showed that GEP-1 could significantly promote the growth of Akkermansia muciniphila (A. muciniphila) and Lacticaseibacillus paracasei (L.paracasei) strains. These results implied that GEP-1 might be useful for human by modulating gut microbiota.

Structural characterization of chelator-terminated dendrimers and their synthetic intermediates by mass spectrometry

2005 ◽  
Vol 40 (9) ◽  
pp. 1203-1214 ◽  
Author(s):  
Ursula E. Ch. Berndt ◽  
Tao Zhou ◽  
Robert C. Hider ◽  
Zu D. Liu ◽  
Hendrik Neubert
Keyword(s):  
Mass Spectrometry ◽  
Structural Characterization ◽  
Synthetic Intermediates

Structural Characterization of Monosialo-, Disialo- and Trisialo-gangliosides by Negative Ion AP-MALDI-QIT-TOF Mass Spectrometry with MSn Switching

2012 ◽  
Vol 37 (6) ◽  
pp. 1315-1324 ◽  
Author(s):  
Emi Ito ◽  
Akio Tominaga ◽  
Hiroaki Waki ◽  
Kozo Miseki ◽  
Azusa Tomioka ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Structural Characterization ◽  
Negative Ion
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