38 results about "Dehydroascorbic acid" patented technology

Compounds of the formula: are described wherein: A1 is ascorbic acid, dehydroascorbic acid, ascorbyl-2-phosphate, an analog thereof, or a salt thereof; L is a linking group coupled to A1 at the C5 or C6 position thereof; and B1 is an active agent such as an imaging agent or therapeutic agent (e.g. a bisphosphonate), along with pharmaceutically acceptable salts and prodrugs thereof. The compounds are useful for, among other things, improving cartilage uptake of active agents administered for joint diseases such as osteoarthritis and rheumatoid arthritis, and for improving gastrointestinal absorption of bisphosphonates.

A process for manufacturing a black leaf tea that is infusible in hot or cold water. The process involves macerating freshly plucked tea leaves, allowing them to ferment, firing the leaves to arrest fermentation and then drying them to yield black leaf tea, wherein the tea leaves are treated with a solubilising compound selected ascorbic acid, dehydroascorbic acid, 1-scorbamic acid, 5-phenyl-3,4-diketo-gamma-butyrolactone (4-phenyl-2,3-diketo-gamma-butyrolactone) or their salts and mixtures thereof in an amount that is sufficient for the black leaf tea to be soluble in water at 5 to 100° C.

The present invention provides a gypsum composition, a gypsum board and their preparation method and the use of DHA as an anti-sagging additive in a gypsum product. Said gypsum board comprises set gypsum prepared from the composition; while said composition comprises gypsum, and an anti-deformation additive, wherein the anti-deformation additive comprises at least one selected from a group consisting of dehydroascorbic acid, dehydroascorbate and semidehydroascorbic acid. The set gypsum prepared from the said composition shows better anti-sagging or deformation resisting property. The gypsum product of the present invention is hardly distorted and has stronger stability even in the condition of high humidity, thus improve the quality of the gypsum product to meet the demands of the customer.

Cosmetic compositions for artificially coloring the skin contain, formulated into a physiologically acceptable medium,a) at least dehydroascorbic acid and / or a monomeric derivative and / or isomeric form and / or polymeric derivative thereof, andb) at least one preferably monocarbonyl or polycarbonyl self-tanning agent;the dehydroascorbic acid may be formed “in situ” from ascorbic acid or a derivative thereof or a salt thereof via chemical oxidation and / or via enzymatic oxidation.

The invention relates to stable liquid compositions containing the oxidized form of vitamin C known as dehydroascorbic acid (DHAA). The compositions comprise DHAA and a pharmacologically acceptable liquid organic polyol solvent. The polyol solvent comprises about 50% or greater of the total weight of the composition. The compositions are useful as dietary supplements, skin-enhancers, concentrates, or research solutions.

The invention relates to fermented milk with DHA (dehydroascorbic acid) and EPA (eicosapentaenoic acid) and a preparation method thereof; the fermented milk is prepared by fermenting, by bacteria, milk with trehalose, white granulated sugar, a stabilizer, whey protein powder, fish oil or fish oil powder, an antioxidant, an emulsifier and a sweetener; sterilizing; filling with opaque oxygen-tight packaging material. Through burdening, preparation, and packaging study and design for the fermented milk with DHA and EPA, the technical problem that the fermented milk with fish oil or fish oil power products has unstable flavor is solved, product stability in shelf life is guaranteed, and the fermented milk with DHA and EPA is provided, having good flavor.

A gas concentration regulator for culturing anaerobic bacteria, comprising: (a) dehydroascorbic acid; (c) a transition metal catalyst; (d) activated carbon; (e) at least one element selected from the group consisting of alkali metal carbonates, alkali metal hydroxides, and alkaline earth metal hydroxides; and (f) water.

The invention relates to a gas field gas dehydrated ethanediol regenerator corrosion inhibitor, which is applied to the technical field of oil gas field gas extraction equipment corrosion inhibition and belongs to a special composite corrosion inhibitor for inhibiting the corrosion of a gas field gas dehydrated ethanediol regenerator. The gas field gas dehydrated ethanediol regenerator corrosion inhibitor comprises the following ingredients in weight parts: 0.35 to 0.55 part of imidazolone, 0.09 to 0.15 part of dormison, 0.1 to 0.5 part of 1-hydroxy ethylidene-1,1-diphosphonic acid (HEDPA), 16 to 18 parts of triethanolamine, 0.35 to 0.55 part of Mannich base, 0.09 to 0.15 part of dehydroascorbic acid and 0.02 to 0.1 part of ditertbutylhydroquinone. The gas field gas dehydrated ethanediol regenerator corrosion inhibitor has the effect that the serious corrosion problems of serious corrosion in parts of process pipelines, valves, regeneration towers and the like of the existing gas field gas dehydrated ethanediol regenerating system , even perforation and the like are solved.