111results about How to "Play a role" patented technology

The invention relates to a photocatalyst air purifying device, comprising a fan and a photocatalyst purifying module. The fan provides air flow and the photocatalyst purifying module comprises a plurality of light supplies, a plurality of first photocatalyst strainers and a plurality of second photocatalyst strainers. The first photocatalyst strainers are arranged around the light supplies in parallel and are vertical to the air flow, but the second photocatalyst strainers are arranged around the light supplies and are vertical to the first photocatalyst strainers and parallel with the air flow.

The invention discloses a rosa roxburghii polysaccharide, as well as a preparation method and application thereof. The preparation method mainly comprises raw material pretreatment, extraction, deproteinization, de-coloration, alcohol precipitation, as well as separation and purification, wherein the extraction is to mix pretreated rosa roxburghii dry powder and water in a mass volume ratio of (1to 15) to (1 to 35), and perform extraction at a temperature of 55 to 95 DEG C; perform centrifugal separation to obtain a rosa roxburghii polysaccharide extracting solution, and concentrate the rosaroxburghii polysaccharide extracting solution under reduced pressure to 1 / 3 to 1 / 6 of the original volume to obtain a concentrated solution of the rosa roxburghii polysaccharide. The rosa roxburghii polysaccharide prepared by the invention has the advantages of high purity and uniform molecular weight. Compared with the existing rosa roxburghii polysaccharide, as proved by in-vitro fermentation experiments, the rosa roxburghii polysaccharide disclosed by the invention can promote the generation of short-chain fatty acids such as acetic acid, propionic acid and butyric acid, promote the growthof beneficial bacteria such as lactic acid bacteria and bifidobacterium, and can be taken as prebiotics. Meanwhile, the rosa roxburghii polysaccharide can inhibit the activity of alpha-glucosidase, and can be applied to healthy foods or medicines having auxiliary therapy effects on intestinal diseases and diabetes mellitus.

The invention discloses a clamp for metal thin-wall whole segment tube axial tension and compression fatigue test, and is used for realizing the clamping of a thin-wall tubular sample in fatigue test in liquid lead-based alloy environment. The clamp is rotationally connected onto a core sleeve with a taper through a conical core rod, and is assembled on a fixed frame with a reversed T-shaped groove; an outer clamp cover is connected with the fixed frame through a bolt; a lock nut is rotationally connected with the fixed frame till being fastened with the fixed frame to form the clamp. By adopting the clamp, the clamping force to the tubular sample is enhanced through internal and external clamping, the stress concentration of the clamp is reduced, the probability that the liquid lead-based alloy is in direct contact with the interior of the clamp is decreased, the corrosion of the liquid lead-based alloy to main structural components inside the clamp is reduced, and the service life of the clamp is prolonged.