The assessment of grape products (berry, juice, and wine) quality using vibrational spectroscopy coupled with multivariate analysis

2022 ◽  
pp. 187-206
Author(s):  
A.C. Power ◽  
J. Chapman ◽  
S. Chandra ◽  
J.J. Roberts ◽  
R. Dambergs ◽  
...  
Keyword(s):  
Multivariate Analysis ◽  
Vibrational Spectroscopy ◽  
Wine Quality

Univariate and Multivariate Analysis of Tannin-Impregnated Wood Species Using Vibrational Spectroscopy

2014 ◽  
Vol 68 (4) ◽  
pp. 488-494 ◽  
Author(s):  
Thomas Schnabel ◽  
Maurizio Musso ◽  
Gianluca Tondi
Keyword(s):  
Multivariate Analysis ◽  
Vibrational Spectroscopy ◽  
Wood Species ◽  
Impregnated Wood

scholarly journals To What Extent Are the Effects of UV Radiation on Grapes Conserved in the Resulting Wines?

Plants ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1678
Author(s):  
María-Ángeles Del-Castillo-Alonso ◽  
Laura Monforte ◽  
Rafael Tomás-Las-Heras ◽  
Javier Martínez-Abaigar ◽  
Encarnación Núñez-Olivera
Keyword(s):  
Climate Change ◽  
Fatty Acids ◽  
Multivariate Analysis ◽  
Phenolic Compounds ◽  
Antioxidant Capacity ◽  
Uv Radiation ◽  
Wine Quality ◽  
Hydroxybenzoic Acids ◽  
Wine Color ◽  
Ambient Levels

Ultraviolet (UV) radiation strongly influences grape composition, but only a few studies have focused on how this influence is conserved in the resulting wines. Here we analyzed to what extent the changes induced by exposing Tempranillo grapes to UV radiation from budbreak to harvest were conserved in wine. By using different cut-off filters and lamps, we differentiated the effects of ambient levels of UV-A and UV-B wavelengths, as well as the effects of a realistic UV-B enhancement associated with climate change. Among phenolic compounds, the most consistent responses to UV were those of flavonols (particularly quercetin-, kaempferol-, isorhamnetin- and myricetin-glycosides), which significantly increased in wines whose grapes had been exposed to a synergic combination of UV-A and UV-B radiation. This confirms that flavonols are the phenolic compounds most reliably conserved from UV-exposed grapes to wine, despite the possible influence of the winemaking process. Flavonols are important compounds because they contribute to wine co-pigmentation by stabilizing anthocyanins, and they are interesting antioxidants and nutraceuticals. Hydroxycinnamic acids also increased under the same UV combination or under UV-A alone. Wine VOCs were much less reactive to the UV received by grapes than phenolic compounds, and only esters showed significantly higher values under (mainly) UV-A alone. This was surprising because (1) UV-A has been considered to be less important than UV-B to induce metabolic changes in plants, and (2) esters are produced during winemaking. Esters are relevant due to their contribution to the fruity aroma in wines. In general, the remaining phenolic compounds (stilbenes, flavanols, hydroxybenzoic acids, and anthocyanins) and VOCs (alcohols, hydrocarbons, and fatty acids), together with wine color and antioxidant capacity, showed inconsistent or non-significant responses to UV radiation. These results were summarized by a multivariate analysis. Our study opens up new possibilities to artificially manipulate UV radiation in grapevine cultivation to improve both grape and wine quality.

Prediction of diesel fuel properties by vibrational spectroscopy using multivariate analysis

2012 ◽  
Vol 67 (12) ◽  
pp. 939-949 ◽  
Author(s):  
Slavica Marinović ◽  
Marko Krištović ◽  
Branka Špehar ◽  
Vinko Rukavina ◽  
Ante Jukić
Keyword(s):  
Multivariate Analysis ◽  
Vibrational Spectroscopy ◽  
Diesel Fuel ◽  
Fuel Properties

Interactions of water confined in a metal–organic framework as studied by a combined approach of Raman, FTIR, and IR electroabsorption spectroscopies and multivariate curve resolution analysis

2020 ◽  
Vol 22 (32) ◽  
pp. 17798-17806
Author(s):  
Takayuki Hiraoka ◽  
Shinsuke Shigeto
Keyword(s):  
Multivariate Analysis ◽  
Vibrational Spectroscopy ◽  
Metal Organic Framework ◽  
Multivariate Curve Resolution ◽  
Combined Approach ◽  
Curve Resolution ◽  
Resolution Analysis ◽  
Metal Organic ◽  
Organic Framework

Distinct interactions of water in heterogeneous confinement of a pillared-layer type MOF elucidated by a joint vibrational spectroscopy-multivariate analysis investigation.

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