Abstract: A cordycepin-based derived compound with an anti-tumor effect, and a structure of the compound is as shown in formula I; a cordycepin derivative and a pharmaceutical composition thereof provided by the invention have a good anti-tumor proliferation effect; compared with a parent drug, the cordycepin derivative has better affinity to cell membranes, so that a half-life period of in-vivo metabolism of the drug is longer, and in-vivo remaining time of the drug is longer; compared with other nucleoside anti-tumor drugs, the cordycepin derivative and the pharmaceutical composition thereof provided by the invention have wider types and action ranges of tumors, have excellent inhibition effects on a gastric cancer, a pancreatic cancer, a liver cancer, a small cell lung cancer, a colorectal cancer, melanoma, an ovarian cancer and the like, and have lower side effects and better curative effects.

Abstract: A method for preparing a nitrogen-containing heterocyclic compound and a derivative thereof by an enzymatic-chemical cascade method, comprising: reacting an alcohol, an amine, an alcohol dehydrogenase, a flavin molecule and a coenzyme in a solvent to obtain the nitrogen-containing heterocyclic compound and the derivative thereof; compared with the prior art, the method is a green and economical enzymatic-chemical cascade method, and is used for synthesizing nitrogen-containing heterocyclic compounds and derivatives thereof; compared with a common toxic chemical catalyst, the alcohol dehydrogenase is selected as a catalyst in the method, which has the characteristics of high substrate specificity, no pollution, high catalytic efficiency, no toxic solvents and simple post-treatment.

Abstract: The invention belongs to the field of rubber tire processing, and particularly discloses an application of a lignin in preparing a radial tire, wherein the lignin is capable of completely or partially replacing resorcinol, and meanwhile, the lignin is also capable of completely or partially replacing an anti-aging agent. Compared with the prior art, the resorcinol is replaced or partially replaced by a biomass-derived lignin or a modified lignin in the invention, so that requirements of cost reduction, environmental protection and no toxicity are satisfied. Especially, the lignin modified by demethylation according to the invention is capable of effectively enhancing various properties of rubber.

Abstract: A modified lignin reinforced rubber is obtained by subjecting a lignin to composite modification by a compound containing a carbon-carbon double bond, a compound containing a sulfur element and a compound capable of blocking a hydroxyl; the lignin is modified with the compound containing the carbon-carbon double bond, and the contained double bond and an olefin in the rubber generate a bonding effect, which improves a binding force between the lignin and the rubber; furthermore, by modifying the lignin with the compound containing the sulfur element, the lignin contains a certain amount of the element sulfur, which improves an interaction between the lignin and the rubber, improves properties of the rubber, and reduces the use of a vulcanizing agent, and further increases a replacement amount of the lignin to carbon black.

Abstract: The invention belongs to the field of rubber tire processing, and particularly discloses an application of a lignin in preparing a radial tire, wherein the lignin is capable of completely or partially replacing resorcinol, and meanwhile, the lignin is also capable of completely or partially replacing an anti-aging agent. Compared with the prior art, the resorcinol is replaced or partially replaced by a biomass-derived lignin or a modified lignin in the invention, so that requirements of cost reduction, environmental protection and no toxicity are satisfied. Especially, the lignin modified by demethylation according to the invention is capable of effectively enhancing various properties of rubber.

Abstract: It discloses a lignin enhanced wood-plastic composite, belonging to the field of polymer based composites. The wood-plastic composite is composed of one or more of plant fiber, lignin, a recycled thermoplastic plastic, mineral powder and a processing aid, and is processed by a screw granulating extrusion process. Compared with the prior art, the mechanical properties, heat stability and aging resistance of a wood-plastic material are improved by adding lignin into the wood-plastic material according to the present invention.

Abstract: It discloses a lignin enhanced wood-plastic composite, belonging to the field of polymer based composites. The wood-plastic composite is composed of one or more of plant fiber, lignin, a recycled thermoplastic plastic, mineral powder and a processing aid, and is processed by a screw granulating extrusion process. Compared with the prior art, the mechanical properties, heat stability and aging resistance of a wood-plastic material are improved by adding lignin into the wood-plastic material according to the present invention.

Abstract: It discloses a chemical regeneration method of oxidized coenzyme NAD(P)+ which is under an oxygen or air atmosphere condition, adding a catalytic amount of bridged flavin, and oxidizing NAD(P)H to obtain NAD(P)+. The catalyst for regeneration of cofactor is cheap and easily available small organic molecule having no noble metal; this regeneration system can regenerate NADH and NADPH; this regeneration system has a wide pH range and temperature range, being applicable to various oxidation reactions catalyzed by nicotinamide-dependent oxidoreductase.

Abstract: It discloses a chemical regeneration method of oxidized coenzyme NAD(P)+ which is under an oxygen or air atmosphere condition, adding a catalytic amount of bridged flavin, and oxidizing NAD(P)H to obtain NAD(P)+. The catalyst for regeneration of cofactor is cheap and easily available small organic molecule having no noble metal; this regeneration system can regenerate NADH and NADPH; this regeneration system has a wide pH range and temperature range, being applicable to various oxidation reactions catalyzed by nicotinamide-dependent oxidoreductase.