945 results about "Isothiocyanate" patented technology

The present invention aims at extracting, separating and purifying the active components of Maka as one natural plant to obtain extractive with several medicinal and health care values. Fresh or dried Maka root material is extracted and separated to obtain active components and extracted residue. The active components includes glucosinolate and its decomposed product isothiocynate in 10-90 wt%,Maka amide and Maka olefin 5-70 wt% and sterol 2-30 wt%. The active components may be further prepared into capsule, tablet, and delayed releasing forms, and the prepared medicine and health food have the functions of treating climacteric syndrome, strengthening male's and female's sexuality, improving sexual function, etc.

An aminated complex-type oligosaccharide derivative, for example, of the formula (1) wherein R1 is H—(CO)—CH2X, —NH—(CO)—(CH2)b—CH2X, isothiocyanate group, —NH—(CO)a—(CH2)b—CO2H or —NH—(CO)a—(CH2)b—CHO, X being a halogen atom, a being 0 or 1, b being an integer of 1 to 4, R2 and R3 are a hydrogen atom or a group of the formulae (2) to (5) and may be the same or different, except for the case where both R2 and R3 are hydrogen or the formula (5), and the case where one of R2 and R3 is a hydrogen atom, with the formula (5) serving as the other thereof.

The invention discloses a wide-spectrum plant cold-resisting agent for plants such as food crops, economic crops, vegetables, fruit trees, economic trees, flowers, and lawns. The active component of the agent is chitosanoligosaccharide or a derivative thereof. The chitosanoligosaccharide is oligosaccharide of glucosamine linked through beta-1,4-glucosidic bond, and has a molecular weight of 300-10000Da, and a deacetylation degree of 50-100%. The chitosanoligosaccharide derivatives are chitosanoligosaccharide sulfuric acid derivative, chitosanoligosaccharide hydrochloric acid derivative, chitosanoligosaccharide phosphoric acid derivative, chitosanoligosaccharide sulfonamide derivative, chitosanoligosaccharide acyl isothiocyanate derivative, chitosanoligosaccharide phosphoric derivative, chitosanoligosaccharide guanidine derivative, chitosanoligosaccharide nicotinicacyl isothiocyanate derivative, chitosanoligosaccharide-cerium (IV) complex, and the like.

The invention discloses a fluorescence quantitative PCR detection kit of hepatitis B virus and an application thereof. The kit is composed of the following independent components: DNA extraction solution I, DNA extraction solution II, DNA extraction solution III, DNA extraction solution IV, positive control interior label, PCR reaction liquid, probe HBV-SP, enzyme mixed liquor containing heat resistant DNA polyase and uracil DNA glycosylase, quantitative hepatitis B virus reference material, hepatitis B virus positive control serum and hepatitis B virus negative control serum, wherein DNA extraction solution I contains 0.2-1.0% of lauryl sodium sulphate (mass / volume), 1.0-4.0% of Triton (volume / volume) and 0.2-1.0mol / L of guanidinium isothiocyanate; DNA extraction solution II contains 100-300mmol / L of 4-HEPES, 100-300mmol / L of sodium chloride with pH of 6.5+ / -0.2 and 100-400 mu g / ml of magnetic beads; DNA extraction solution III contains 0.1-1.0% of Triton (volume / volume) and 100-300mmol / L of sodium chloride; DNA extraction solution IV contains mineral oil. The fluorescence quantitative PCR detection kit of hepatitis B virus of the invention can be used for detecting the HBV-DNA concentration in samples of serum, blood plasma or latex and the like.

The invention provides an extration method of plant RNA by utilizing guanidinium isothiocyanate-chloroform extractive and Tris purification. The invention improves traditional guanidinium isothiocyanate method, adopts the two steps of chloroform extration after cracking and phenol-adding for purification, and respectively extract high-quality total RNA from the leaf blade and seed case of red-skinned pears, the leaf blade, fruit flesh and seed case tissues of grapes, the fruit of strawberries and the callus of arnebia euchroma. The extraction buffer liquid in the method contains guanidinium isothiocyanate, sodium dodecyl sarcosinate, sodium citrate, soluble polyvinylpyrrolidone and beta-mercaptoethanol, which can not only crack plant cells efficiently and release RNA, but also effectivelyinhibit the activity of RNA enzyme, and can also prevent the oxidation of phenolic compounds and suppress the interference of secondary metabolites. In the second step, Tris purification is utilized for crude extraction of RNA solution, which can eliminate the polysaccharides and protein which can coprecipitate with RNA. The invention is simple in operating steps, economic and practical, good in stability, and suitable for extracting high-quality total RNA from plant tissue rich in polysaccharides and polyphenols and secondary metabolites.

The present invention relates to a composition for optical materials, comprising (a) a compound having in one molecule at least one structure represented by the following Formula 1: wherein R<1 >is a C0-10 hydrocarbon group, each of R<2>, R<3 >and R<4 >is a C1-10 hydrocarbon group or hydrogen, Y is O, S, Se or Te, m is 1 to 5, and n is 0 to 5; (b) a compound having in one molecule at least one isocyanate group and / or at least one isothiocyanate group; (c) a compound having in one molecule at least one mercapto group; and (d) an inorganic compound having sulfur atom and / or selenium atom, and also relates to an optical material produced by polymerization curing the composition, a production method thereof, and an optical lens comprising the optical material. The present invention provides a high refractive, high Abbe's number optical material having an improved impact resistance.

Agents that stimulate nuclear translocation of Nrf2 protein and the subsequent increases in gene products that detoxify and eliminate cytotoxic metabolites are provided in a method for treating glaucomatous retinopathy or optic neuropathy. The structurally diverse agents that act on the Nrf2 / ARE pathway induce the expression of enzymes and proteins that possess chemically versatile cytoprotective properties and are a defense against toxic metabolites and xenobiotics. Agents include certain electrophiles and oxidants such as a Michael Addition acceptor, diphenol, thiocarbamate, quinone, 1,2-dithiole-3-thione, butylated hydroxyanisole, flavonoid, an isothiocyanate, 3,5-di-tert-butyl-4-hydroxytoluene, ethoxyquin, a coumarin, combinations thereof, or a pharmacologically active derivative or analog thereof.