4results about How to "Improve application features" patented technology

This invention discloses a method for reducing the viscosity of potato starch, belonging to the fields of enzyme engineering and biomodified starch technology. This invention provides a method for preparing macrocyclodextrin by reacting starch with 4-α-glycosyltransferase, which is then added to potato starch to provide a suitable substrate for subsequent starch processing. This application in starch processing offers a new approach and has great potential and application prospects.

The invention belongs to the technical field of lithium ion batteries, and relates to a cyano electrolyte additive, an electrolyte and a lithium ion battery. The cyano electrolyte additive comprises a nitrile additive and a functional additive; the structural formula of the functional additive is shown in the specification. The nitrile additive and the functional additive are compounded, the functional additive has a cyano group and a triazine ring, the triazine ring is chelated with transition metal ions and cooperates with the cyano group to form a film, and a benzene ring rigid structure can enhance the thermal stability. The nitrile additive and the functional additive have a cyano complementation effect, three phenyl groups in the functional additive are connected with a triazine ring, so that the functional additive has a larger structure and steric hindrance and cannot be completely complexed with transition metal ions on the surface of the positive electrode, and the short-chain nitrile additive has a smaller structure and can make up the space of the functional additive; and the two synergistically form a complementary effect to form a compact interfacial film on the surface of the positive electrode so as to improve the high-temperature performance.

The invention discloses a phenylalanine ammonialyase mutant and application thereof, and belongs to the technical field of bioengineering. The technical problems that existing natural phenylalanine ammonialyase is poor in thermal stability and limited in catalytic efficiency and has cross catalytic activity are solved. According to the mutant provided by the invention, 73rd-site serine of an amino acid sequence as shown in SEQ ID NO: 1 is substituted into asparagine, 84th-site phenylalanine is substituted into tyrosine, 90th-site valine is substituted into arginine or 95th-site glutamic acid is substituted into valine, or conservative substitution derivation is carried out on the basis, so that the mutant is obtained. Therefore, the phenylalanine ammonialyase mutant with significantly improved catalytic efficiency and thermal stability and strict substrate specificity is obtained. The mutant is mainly used for efficiently removing phenylalanine in protein raw materials, and has important application value in preparation of low-phenylalanine formula food for special medical purposes and related health care products suitable for phenylketonuria patients.

The invention provides a preparation process and application of novel phosphatidylated carnosic acid, and the preparation process comprises the following steps: mixing 3-5 parts by mass of soybean phospholipid and 1-3 parts by mass of modified soybean phospholipid, melting at low temperature, adding 5-10 parts by mass of carnosic acid, mixing, and curing at low temperature to obtain the novel phosphatidylated carnosic acid. The preparation method of the modified soybean phospholipid comprises the following steps: (1) adding organic acid into soybean concentrated phospholipid serving as a raw material, and uniformly stirring for later use; and (2) continuously adding the material prepared in the step (1) into an absorption tower, intermittently or continuously blowing ozone into the absorption tower at the same time, enabling the material to be in contact with the ozone to carry out oxidation reaction, discharging the material from the absorption tower, and drying at the vacuum degree of 0.095-0.1 Mpa to prepare the modified soybean phospholipid. After the carnosic acid is phosphatized, the stability can be improved, and the bioavailability of the carnosic acid can be enhanced. The application of the compound in the fields of food, food additives, animals, pets, cosmetics or other antioxidation and the like is expanded.