4results about How to "Moderate use" patented technology

The invention belongs to the technical field of chemical catalysis, and particularly relates to a supported catalyst, a preparation method of the supported catalyst and application of the supported catalyst to preparation of dihydroxyacetone through glycerol oxidation. The supported catalyst provided by the invention is an Au-based catalyst, the carrier of the supported catalyst is a copper-cerium composite oxide, the gold loading capacity is low, and even if the gold content is low, glycerol oxidation can be efficiently catalyzed in a heterogeneous and non-alkaline environment to prepare DHA. The invention also provides an application of the supported catalyst provided by the scheme or the supported catalyst prepared by the preparation method provided by the scheme in preparation of dihydroxyacetone by glycerol oxidation. The supported catalyst disclosed by the invention is used for preparing DHA through catalytic oxidation under mild reaction conditions by taking glycerol as a raw material, and is small in equipment corrosion and environment-friendly, so that the supported catalyst has wide application potential in the future.

The invention provides a glass photoresist removing solution as well as a preparation method and application thereof. The glass photoresist removing solution is prepared from the following components in parts by weight: 10 to 20 parts of a flexible glue solvent, 5 to 10 parts of a penetrant, 6 to 12 parts of a solubilizer, 1 to 3 parts of a protective agent and 60 to 80 parts of water. The glass degumming liquid provided by the invention is mild in use condition and good in degumming effect, and glass after degumming is high in cleanliness, low in scratch rate and high in visible light transmittance.

The invention discloses a preparation method of a biphenyl compound for synthesizing cephalotaxine, belongs to the technical field of catalytic synthesis, and particularly relates to the preparation method of the biphenyl compound for synthesizing the cephalotaxine. In order to solve the problems that the existing preparation method for synthesizing the biphenyl compound of cephalotaxine is expensive in initial raw materials, complex in operation and low in yield of the obtained product, the biphenyl compound is synthesized by taking commercial reagents homopiperony lamine and ferulic acid as initial raw materials and taking a Suzuki coupling reaction as a key step; and the compound can be used as a synthesis precursor of cephalotaxine. According to the route, commercial reagents are used as raw materials, the reaction cost is reduced, meanwhile, the use conditions are mild, experimental operation is easy, the biphenyl compound is obtained with the good yield, and meanwhile a certain foundation is laid for synthesis of cephalotaxine. The method is used for synthesizing the biphenyl compound.

This invention relates to a three-dimensional scaffold based on chirality and peptides for selective cell adhesion, its preparation method, and its applications, relating to the field of medical products. The three-dimensional scaffold is a stacked, three-dimensional ordered structure, with each layer comprising several ordered polyelectrolyte multilayer membrane soft carriers arranged at an angle between adjacent layers. Each layer of the polyelectrolyte multilayer membrane is formed by alternating deposition of positively charged chiral molecules grafted with specific recognition groups and negatively charged supramolecular polyelectrolytes on the soft carriers, followed by modification with peptides. The two peptides in adjacent polyelectrolyte multilayer membranes are different and are used to promote the specific adhesion of different cells. The three-dimensional scaffold provided by this invention has specific adhesion properties, thereby avoiding excessive cell proliferation in incorrect locations and helping to prevent problems such as re-injury and stenosis of artificial blood vessels.