Investigation of the traditional organic vinegars by UV-VIS spectroscopy and rheology techniques
Küçük Resim Yok
Tarih
2021
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Pergamon-Elsevier Science Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Optical, rheological and metabolic properties of the apple, hawthorn, artichoke, grape, rosehip and blackberry organic vinegar produced by deep culture method (handmade traditional method) were analysed using UV-Vis spectroscopy and rheology techniques. Flow behaviours for all samples were analysed in the shear rate range of 10(-3) to 10(3) 1/s and in frequency range of 10(-3) to 10(3) rad/s, respectively. Absorption spectra for six organic vinegars was observed two peaks around 215 and 285 nm due to the presence of phenolic compounds and organic acids such as acetic. The effects of optical transitions of organic molecules on the absorption coefficient values for vinegars were determined. Optical energy band gaps of all samples were found to be consistent with Planck's radiation approach known as Rayleigh-Jeans law and Tauc law. The rheological/flow properties of the all vinegars were found to be relevant with non-Newtonian flow behaviour and Ostwald-de Waele model. From the results of optical and rheological analysis, which determines the quantity and quality characteristics of all organic vinegars, it was concluded that these vinegars are in a level that people can drink easily. (c) 2020 Published by Elsevier B.V.
Açıklama
Anahtar Kelimeler
Organic vinegar, UV-Vis spectroscopy, Absorbance spectra, Rheology, Viscosity, Organic acids, Phenolic compounds
Kaynak
Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy
WoS Q Değeri
Q1
Scopus Q Değeri
Q2
Cilt
246
