[HTML][HTML] Comparative quantification of chlorophyll and polyphenol levels in grapevine leaves sampled from different geographical locations

E Martín-Tornero, RNM de Jorge Páscoa… - Scientific Reports, 2020 - nature.com
Near infrared spectroscopy (NIRS) and mid-infrared spectroscopy (MIRS) in combination
with chemometric analysis were applied to discriminate the geographical origin of grapevine …

[HTML][HTML] Support vector machine and artificial neural network models for the classification of grapevine varieties using a portable NIR spectrophotometer

S Gutierrez, J Tardaguila, J Fernandez-Novales… - PloS one, 2015 - journals.plos.org
The identification of different grapevine varieties, currently attended using visual
ampelometry, DNA analysis and very recently, by hyperspectral analysis under laboratory …

Feasibility study on the use of a portable micro near infrared spectroscopy device for the “in vineyard” screening of extractable polyphenols in red grape skins

B Baca-Bocanegra, JM Hernández-Hierro… - Talanta, 2019 - Elsevier
There is substantial variation in levels of extractable phenolic compounds of red grapes
(Vitis vinifera L.). Therefore, it could be desirable to known the aforesaid parameter at least …

[HTML][HTML] Geographical discrimination of grapevine leaves using fibre optic fluorescence data and chemometrics. Determination of total polyphenols and chlorophylls …

E Martín-Tornero, ID Martín-Merás, AE Mansilla… - Microchemical …, 2022 - Elsevier
Auto fluorescence of grapevine leaves has been employed to discriminate vineyards from
two different geographical regions and to quantify the amount of total polyphenols and …

Assessment of maturity of loire valley wine grapes by mid-infrared spectroscopy

D Picque, P Lieben, P Chrétien, J Béguin, L Guérin - OENO One, 2010 - oeno-one.eu
Aim: The objective of the present study was to assess the ripening of grapes collected at
different stages of maturation between the “véraison” and harvest periods from mid-infrared …

Feasibility study on the use of near infrared spectroscopy to determine flavanols in grape seeds

R Ferrer-Gallego, JM Hernández-Hierro… - Talanta, 2010 - Elsevier
The potential of near infrared spectroscopy to determine the content of flavanols directly
recording the infrared spectra of grape seeds has been evaluated. Moreover, the study …

Infrared spectroscopy investigation of fresh grapevine (Vitis vinifera) shoots, leaves, and berries using novel chemometric applications for viticultural data

E van Wyngaard, E Blancquaert, H Nieuwoudt… - … and Electronics in …, 2022 - Elsevier
Infrared spectroscopy provides extensive spectral and chemical information for plant
material. However, the raw spectral data of fresh grapevine organs are poorly understood …

Characterization of the medium infrared spectra of polyphenols of red and white wines by integrating FT IR and UV–Vis spectral data

P Scano - Lwt, 2021 - Elsevier
Infrared spectroscopy is widely applied in the wine sector. The medium infrared (MIR)
spectral region between 1800 and 900 cm-1 is very informative for polyphenols. Aim of this …

[HTML][HTML] Determination of phenolic compounds of grape skins during ripening by NIR spectroscopy

R Ferrer-Gallego, JM Hernández-Hierro… - LWT-Food Science and …, 2011 - Elsevier
The potential of near infrared spectroscopy (NIRS) to determine the content of phenolic
compounds in red grapes has been evaluated. The near infrared spectra of intact grapes …

[PDF][PDF] Near infrared spectroscopy, cluster and multivariate analysis-contributions to wine analysis

W Guggenbichler, CW Huck, A Kobler… - Journal of Food …, 2006 - academia.edu
In this work we investigated different vine grapes (genus Vitis), grape varieties and bottled
red wines using fiber-optics based near infrared transflectance and transmission …