4 results about "GRAPE SKIN EXTRACT" patented technology

The present invention provides an astaxanthin-based antioxidant composition, a preparation method thereof, and an application thereof. The antioxidant composition comprises the following components in parts by weight: 0.02-1.0 parts of astaxanthin, 0.01-4 parts of a plant enzymatic hydrolysate, 0.01-3 parts of a plant fermentation product, and 0.01-1.5 parts of a grape skin extract. The present invention, by adding the plant enzymatic hydrolysate and the plant fermentation product, can synergistically improve the antioxidant properties of the antioxidant composition with astaxanthin; simultaneously, the addition of the plant enzymatic hydrolysate and the plant fermentation product can improve the stability of the antioxidant composition; and when astaxanthin, the plant enzymatic hydrolysate, and the plant fermentation product are mixed under specific ratios, the soothing effect of the antioxidant composition on the skin can be improved.

The invention relates to the technical field of microecological preparations, in particular to a composition and application thereof in preparation of a product for improving liver injury. The novel composition provided by the invention contains probiotics, a radix puerariae extract and a grape skin extract, and the composition can effectively improve liver injury from an intestine-liver axis mechanism level. Animal tests prove that the effect is very ideal, the main components have a synergistic effect, the effect of remarkably improving liver injury can be achieved from multiple mechanism levels, and the traditional Chinese medicine composition is safe and free of side effects.

The invention discloses a method for preparing cuprous oxide from grape skin and application of the cuprous oxide in photocatalytic synthesis of hydrogen peroxide, and belongs to the field of green chemistry and photocatalytic synthesis of high-value chemicals. According to the method disclosed by the invention, the biomass waste grape skin is taken as a raw material, rich resveratrol and the like in the raw material are extracted as a green reducing agent, a traditional cuprous oxide synthesis process is innovated, and an environment-friendly and sustainable nano cuprous oxide preparation strategy is developed. The method comprises the following steps: drying fresh grape skin, grinding into powder, adding deionized water, fully heating and stirring, standing, cooling to room temperature, and reserving clear liquid to obtain a grape skin extracting solution; and sequentially adding copper sulfate pentahydrate, sodium hydroxide and the grape skin extracting solution into deionized water, heating and stirring until the reaction is finished, cooling to room temperature, washing and drying to obtain cuprous oxide solid powder.