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320 results about "Zeaxanthin" patented technology

Zeaxanthin is one of the most common carotenoid alcohols found in nature. It is important in the xanthophyll cycle. Synthesized in plants and some micro-organisms, it is the pigment that gives paprika (made from bell peppers), corn, saffron, wolfberries, and many other plants and microbes their characteristic color.

Microcrystalline zeaxanthin with high bioavailability in oily carrier formulations

Zeaxanthin (ZX) or other medically or commercially important carotenoids can be prepared in microcrystalline form, in an oily carrier liquid, to increase their bioavailability following oral ingestion. Initial processing is carried out to prepare a “rough” or “coarse-grained” carotenoid preparation containing relatively large particles of the ZX or other carotenoid, in a suitable form such as a lyophilized stable powder. The coarse-grain preparation is dissolved in a suitable solvent such as tetrahydrofuran, and mixed with a carrier liquid comprising a digestible oil (such as a vegetable oil) and an emulsifying agent. The resulting oil-and-solvent mixture is injected, along with inert gas such as nitrogen, into a vacuum chamber, where a suitable vacuum and temperature combination is used to remove the solvent in a rapid “flash” manner which does not give the carotenoid crystals time to grow larger through accretion or aggregation. This generates a microcrystalline suspension containing very small particles of the ZX or other cartenoid, in the oily liquid carrier. This product can be further processed if desired, or it can be loaded directly into watertight capsules for oral ingestion. Tests on human volunteers have confirmed that the bioavailability of this microcrystalline form is substantially higher than prior art preparations having larger particles of the carotenoid.
Owner:ZEAVISION LLC

Method for preparing lycium barbarum lutein by HSCCC (high-speed countercurrent chromatography) separation

The invention discloses a method for preparing lycium barbarum lutein by HSCCC (high-speed countercurrent chromatography) separation. The method mainly comprises the following steps: grinding and extracting lycium barbarum berry, concentrating extract, saponifying, eluting and dissolving, and carrying out HSCCC separation to obtain a lycium barbarum lutein solution; concentrating, and freeze-drying to obtain a lutein pure product of which the purity is over 90.6 percent by means of HPLC analysis and detection. According to the method, a methanol and tetrahydrofuran composite solvent is adopted for ultrasonic extraction, and a saponification technology is combined and synergized with HSCCC, so that the problem that main carotinoid lutein and zeaxanthine in lycium barbarum belong to isomers and are difficult to separate can be successfully solved; autumn berry of lycium barbarum is utilized as a raw material, so that the production cost is greatly reduced, effective separation of lutein and zeaxanthine can be successfully realized by repeatedly regulating the solvent proportion in the counter-current chromatography separating and purifying phase, a high-purity lutein monomer can be obtained, and a new thought is provided to implementation of separating and purifying lutein from lycium barbarum and implementation of industrial production.
Owner:NINGXIA ACADEMY OF AGRI & FORESTRY SCI
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