Abstract: The invention provides a tocopherol derivative, preparation method therefor, and uses thereof. The tocopherol derivative is a compound with the following structure. wherein R? is hydrogen or an acetyl group; the theanine and tocopherol are esterified in the presence of a catalyst and a co-catalyst to obtain the tocopherol derivative. The compound can be used as an antioxidant in cosmetics, food and health products, pet products, etc. The method has mild reaction conditions, simple operation, high yield, high synthesis efficiency, economic and environmental protection, and has good application prospects.

Abstract: The present invention relates to a small molecular compound and its application as an active ingredient in cosmetics, as well as its preparation method. The small molecular compound is represented by the following chemical formula: Wherein, R1 is selected from compounds represented by the following formula: C1 represents a five-or six-membered carbon ring or heterocycle, while R11 stands for alkyl or ester groups with multiple substitutions on the ring. C2 represents an aromatic ring, while R12 stands for alkyl, ester, carbonyl, ether groups, or cyclic substituents formed by bridging two adjacent substituents on the ring with multiple substitutions. R13, R13?, R13?, identical or different, are selected from hydrogen, ester groups, alkyl, alkenyl, and cycloalkenyl. R2 is chosen from This compound exhibits antioxidant properties when used as a reagent.

Abstract: An assembly process of a Halbach magnetic ring component, including an adsorbing each magnetic shoe on the outer surface of a positioning cylinder; sleeving the sleeve on the outer surface of a circular ring; moving the sleeve downwards so that the upper part of each magnetic shoe is exposed; performing first dispensing on the exposed part of the upper part of each magnetic shoe; sleeving the aluminum ring on the outer surface of the exposed part of the upper part of each magnetic shoe, so that the aluminum ring covers the first dispensing area of each magnetic shoe; moving the sleeve downwards until the sleeve is completely separated from the magnetic shoe, and performing second dispensing on the lower region of each magnetic shoe; moving the aluminum ring downwards until the aluminum ring is completely sleeved on the outer surface of each magnetic shoe.

Abstract: An assembly process of a Halbach magnetic ring component, including an adsorbing each magnetic shoe on the outer surface of a positioning cylinder; sleeving the sleeve on the outer surface of a circular ring; moving the sleeve downwards so that the upper part of each magnetic shoe is exposed; performing first dispensing on the exposed part of the upper part of each magnetic shoe; sleeving the aluminum ring on the outer surface of the exposed part of the upper part of each magnetic shoe, so that the aluminum ring covers the first dispensing area of each magnetic shoe; moving the sleeve downwards until the sleeve is completely separated from the magnetic shoe, and performing second dispensing on the lower region of each magnetic shoe; moving the aluminum ring downwards until the aluminum ring is completely sleeved on the outer surface of each magnetic shoe.