منابع مشابه
Polyphenol extraction from grape wastes: Solvent and pH effect
World wine industry transforms 10% 25% of raw grapes into residues, mainly represented by lees, grape marcs, seeds and stems. These byproducts are a rich source of polyphenols and therefore they can be used to produce new added value products. The aim of this work was to determine the best process conditions (treatment time, % of ethanol and pH of the solvent) during solid-liquid extraction of ...
متن کاملmodified method for production of grape juice concentrate
utilizing natural clay in the traditional production of the grape concentrates in the villages cause the input of large amounts of some metals (solutes) in the product which will be harmful for the consumers. to eliminate the natural clay from this procedure in non-industrial scale, bentonite was selected as an aid-clarifier and examined in treatments under these conditions: two levels of bento...
متن کاملPolyphenol Oxidase Activity during Rooting in Cuttings of Grape (Vitis vinifera L.) Varieties
Polyphenol oxidase (PPO) activity was investigated during rooting in cuttings from three different grape cultivars (Vitis vinifera L. cvs. Muscat, Cardinal and Perlelte), and the enzyme activity and rooting ability were compared. Rooting was observed on the Muscat and Perlelte cuttings, but not on the Cardinal cuttings. PPO activity started to increase in the early stage of the experiment, and ...
متن کاملDietary grape polyphenol resveratrol increases mammary tumor growth and metastasis in immunocompromised mice
BACKGROUND Resveratrol, a polyphenol from grapes and red wine has many health beneficial effects, including protection against cardiovascular and neurodegenerative diseases and cancer. However, our group and others have provided evidence for a dual cancer promoting or inhibitory role for resveratrol in breast cancer, dependent on estrogenic or antiestrogenic activities. Moreover, much of the in...
متن کاملPolyphenol content and antioxidant properties of colored soybean seeds from central Europe.
The antioxidant activity and contents of various polyphenol classes in the seeds of seven soybean varieties of different seed color and one yellow seed cultivar, representing a reference genotype, were evaluated. Total polyphenols and tannins were determined after extraction of plant material with 70% aqueous acetone, and total flavonoids were extracted with methanol and acetic acid, whereas an...
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ژورنال
عنوان ژورنال: Annals of Agrarian Science
سال: 2017
ISSN: 1512-1887
DOI: 10.1016/j.aasci.2017.08.004