Cercetari privind compozitia chimica si proprietatile reologice ale mixturilor din faina de grau si epicarp de struguri

Abstract

Grape skin is considered a valuable by-product for antioxidant and antibacterial agent preparation. The grape skin contains some active compounds, such as, dietary fiber, polyphenols, flavonols, and resveratrol; it is commonly used as a nutritional supplement. The main aim of this study was to establish the optimum dose of grape skin flour, to be used as a functional ingredient in the bakery products industry, from both chemical and rheological point of view. The laboratory experiments evaluated the functional potential of wheat flour enriched with grape skin flour, in different proportions, by examining the chemical composition and rheological behaviour of the doughs. Protein, crude fibre, fat, ash and mineral contents were determined. Using �H-NMR spectral technique, the fatty acids composition was determined, especially the concentrations of short-chain saturated fatty acids (C4-C8), di-unsaturated fatty acids, mono-unsaturated fatty acids and long-chain saturated fatty acids (]C8). 1H-NMR spectra were recorded on a Bruker Ascend 400 MHz spectrometer. The rheological behaviour was analyzed using the predefined Chopin + protocol on Mixolab, an equipment of CHOPIN Technologies. Grape skin flour was incorporated into wheat flour at three different levels, 5, 10 and 15% and it was found that incorporation up to a 15% level into the formulation of wheat flour yielded an acceptable product in terms of rheological parameters, with improved chemical, nutritional and functional properties.

Composition and Antioxidant Activity of Aqueous Extracts Obtained from Herb of Tansy (Tanacetum Vulgare L.)

“…Meteorological conditions are another factor that influences the content in active substances of any plant [11,[27][28][29].…”

“…Very numerous papers of us and other authors are focused to determine the composition and biologic activities of essential oils and extracts obtained from diverse parts of plants harvested in Romania [27][28][29][30][31][32][33]. In the present study, extracts from aerial parts -flowers and leaves from tansy collected in the western part of Romania, were obtained with water and analysed using HPLC.…”

Study on the Stability and Compatibility of the Cosmetic Products with Lavandula angustifolia Oil Kept in PPH Polypropylene Homopolymer Plastic Containers

“…The products used in cosmetic formulations are constantly diversifying as a result of researches in the field, which combine the healing and prevention of many skin conditions with the use of natural products such as vegetable extracts and essential oils [9,18,19]. Research and innovation in this field, as well as in pharmaceutical and environmental fields [20,21] have become necessary, especially nowadays when physical, chemical, and environmental aggressions on the skin cause increasing incidence of skin cancers [22,23].…”

A New, Rapid and Efficient HPLC Method to Assay Resveratrol in Food Supplements

“…Resveratrol is very abundant in beverages such as red wine, fruits such as grape berry and particularly in dried roots of the plant Polygonum cuspidatum. Also, resveratrol can be found in other natural foods such as bilberries, blueberries, peanuts, pistachios and in valuable by-products like grape skin and grape pomace [2,3].…”