Abstract: There is provided a novel ionic composite material that can be molded into various shapes using lignin sulfonic acid as one of raw materials thereof, and having flexibility and elasticity, to significantly improve the strength and toughness and impart complete biodegradability thereto. It was found that a combination of ?-polylysine (?-PL) which is a cationic polymer that is produced by microorganisms and lignin sulfonic acid exhibits excellent strength and toughness. In addition, ?-PL used in this technology is a biodegradable polymer that is completely degraded by microorganisms and the like in the environment. Since lignin sulfonic acid is also a biodegradable polymer, it is thought that a complex in which ?-PL and lignin sulfonic acid are mixed in this technology will exhibit complete biodegradability, and more applications thereof can be expected when utilizing the strength, durability, and biodegradability thereof in addition to the improved strength and toughness.

Abstract: The purpose of the present invention is to provide a PHA, in particular PHBV, having a molecular weight exceeding 3,610,000 and/or a method for producing such a PHA while controlling the molecular weight thereof. Provided is a copolymer of random copolymerization of 3-hydroxybutanoic acid and 3-hydroxyvaleric acid, having a weight-average molecular weight exceeding 3,610,000.

Abstract: There is provided a novel ionic composite material that can be molded into various shapes using lignin sulfonic acid as one of raw materials thereof, and having flexibility and elasticity, to significantly improve the strength and toughness and impart complete biodegradability thereto. It was found that a combination of ?-polylysine (?-PL) which is a cationic polymer that is produced by microorganisms and lignin sulfonic acid exhibits excellent strength and toughness. In addition, ?-PL used in this technology is a biodegradable polymer that is completely degraded by microorganisms and the like in the environment. Since lignin sulfonic acid is also a biodegradable polymer, it is thought that a complex in which ?-PL and lignin sulfonic acid are mixed in this technology will exhibit complete biodegradability, and more applications thereof can be expected when utilizing the strength, durability, and biodegradability thereof in addition to the improved strength and toughness.

Abstract: The present invention provides a compound having a structure represented by the general formula (1): (wherein n is 2 to 100; P represents a (C1-C5) alkylene group substituted with one amino group; Q is represented by the following general formula (2): (wherein X represents an oxygen atom, Y1 and Y2 each represent an alkylene group of 1 to 6 carbon atoms, and m is an integer of 1 to 30); and Z represents a click functional group) or a salt thereof and also provides a pharmacological substance which has the compound or a salt thereof attached thereto by a chemical bond and has an improved biomembrane permeability as well as an improved water solubility.