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Mostrando ítems 1-10 de 16
Artículo
Feasibility Study on the Use of a Portable Micro Near Infrared Spectroscopy Device for the “in Vneyard” Screening of Extractable Polyphenols in Red Grape Skins
(Elsevier, 2019)
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 for each vine. Nowadays, interest has ...
Artículo
Evaluation of the influence of white grape seed extracts as copigment sources on the anthocyanin extraction from grape skins previously classified by near infrared hyperspectral tools
(Elsevier, 2017)
Hyperspectral imaging has been used to classify red grapes (Vitis vinifera L.) according to their predicted extractable total anthocyanin content (i.e. extractable total anthocyanin content determined by a hyperspectral ...
Artículo
Reduction of the Number of Samples for Cost-Effective Hyperspectral Grape Quality Predictive Models
(MDPI, 2021-01)
Developing chemometric models from near-infrared (NIR) spectra requires the use of a representative calibration set of the entire population. Therefore, generally, the calibration procedure requires a large number of ...
Artículo
A novel method for evaluating flavanols in grape seeds by near infrared hyperspectral imaging
(Elsevier, 2014)
Chemical composition of seeds changes during grape ripening and this affects the sensory properties of wine. In order to control the features of wines, the condition of seeds is becoming an important factor for deciding ...
Artículo
Phenolic Compounds and Antioxidant Activity of Twelve Grape Cultivars Measured by Chemical and Electrochemical Methods
(Springer Nature, 2018)
Five red (Rondo, Cabernet carol, Merlot, Pinot noir, Cabernet sauvignon), five white (Solaris, Riesling, Johanniter, Aurora, Saphira), and two pink (Freiminer, Gewurztraminer) grape cultivars were investigated. The phenolic ...
Artículo
Influence of Oak Wood Chips–grape Mix Maceration on the Extraction of Anthocyanins from Low‑extractable Anthocyanin Content Red Grapes
(Springer Nature, 2017)
Wine color depends not only on the amount of anthocyanin present in the grapes, but also on the amount of them that may be extracted from grapes and their interac- tions with other phenolic compounds. Color stabilization ...
Artículo
Cyclic Voltammetry to Evaluate the Antioxidant Potential in Winemaking by-products
(Elsevier, 2017)
Grape pomace is composed of seeds, skins and stems that are an important source of phenolic substances, which have antioxidant properties and potential benefits to human health. Cyclic voltammetry (CV) has been used to ...
Artículo
Interaction between Wine Phenolic Acids and Salivary Proteins by Saturation-Transfer Difference Nuclear Magnetic Resonance Spectroscopy (STD-NMR) and Molecular Dynamics Simulations
(American Chemical Society, 2017)
The interaction between phenolic compounds and salivary proteins is highly related to the astringency perception. Recently, it has been proven the existence of synergisms on the perceived astringency when phenolic acids ...
Artículo
Trying to set up the flavanolic phases during grape seed ripening: A spectral and chemical approach
(Elsevier, 2016)
Grape seeds were collected in ten different dates and classified in seven groups according to their individual hyperspectral imaging characteristics. Proanthocyanidin composition was studied using HPLC-MS for oligomers ...
Artículo
On the Use of Vibrational Spectroscopy and Scanning Electron Microscopy to Study Phenolic Extractability of Cooperage Byproducts in Wine
(Springer Nature, 2019)
Wood is an important source of phenolic compounds, which can be transferred to wine during aging process, improving its properties, from an organoleptic point of view. Therefore, understanding and optimizing the extractability ...