Abstract: Provided are a modified vinyl alcohol (VA) having a reduced water content to exhibit a practically-required form stability, a producing method for the same, and an ion exchange membrane. (1) A copolymer (P) including, as structural units, a vinyl alcohol monomer unit (A), a vinylene monomer unit (B), and a polymer unit (C) having a polar group other than a hydroxyl group. (2) A method for producing the copolymer (P) including: providing a copolymer (P?) including a vinyl alcohol polymer unit (A?) and a polymer unit (C) having a polar group other than a hydroxyl group, and heat-treating the copolymer (P?) under an acidic condition to form a polyene structure by dehydration so as to introduce a vinylene monomer unit (B). (3) An ion-exchange membrane containing as a main component a copolymer (PA) in which the polymer unit (C) having a polar group other than a hydroxyl group is a polymer unit (CA) having an ionic group.

Abstract: A novel polymer which has high solubility and good processability and is suitable as an electrically conductive material, and a novel compound which is a starting material of the polymer. The novel compound to be used as a starting material is a thiophene derivative represented by formula (I) shown below, In the formula (I), A is S; and B is R2 (R2 is an alkylene group having a carbon number of 2 to 3 and optionally having a substituent), provided that A and B are intramolecularly cyclized to form, together with the thiophene group, a bicyclic heterocyclic structure. The novel polymer that is produced by polymerizing the thiophene derivative is suitable as an electrically conductive material.

Abstract: To provide a cell culture chamber capable of reproducing a cell function in vivo, and a method of producing the same. The cell culture chamber according to the present invention has a concave-convex pattern formed on the surface on which cells are cultured. A concave portion of the concave-convex pattern includes cell culture portions and micro flow channels communicating with the cell culture portions. The bottom surface of each of the cell culture portions has a width 1.0 to 20 times an equivalent diameter of each of the cultured cells. A cell adhesion-inducing substance is formed only on the bottom surface and the side walls of the concave portion.

Abstract: Disclosed is a polythiophenes having high electrical conductivity, excellent solubility, long-term stability, excellent processability and high regioregularity. Specifically disclosed is regioregular polythiophene represented by chemical formula (1) wherein R1— represents a 4-substituent including an alkyl having 1 to 20 carbon atoms; R2—O— represents a 3-substituent including an alkyl having 1 to 20 carbon atoms; and n represents such a numeral value that the number average molecular weight of the regioregular polythiophene becomes 200 to 1,000,000, wherein the regioregularity of the Head-Tail repeating structure is at least 98%.

Abstract: A novel polymer which has high solubility and good processability and is suitable as an electrically conductive material, and a novel compound which is a starting material of the polymer. The novel compound to be used as a starting material is a thiophene derivative represented by formula (I) shown below, In the formula (I), A is S; and B is R2 (R2 is an alkylene group having a carbon number of 2 to 3 and optionally having a substituent), provided that A and B are intramolecularly cyclized to form, together with the thiophene group, a bicyclic heterocyclic structure. The novel polymer that is produced by polymerizing the thiophene derivative is suitable as an electrically conductive material.

Abstract: To provide a cell culture chamber capable of reproducing a cell function in vivo, and a method of producing the same. The cell culture chamber according to the present invention has a concave-convex pattern formed on the surface on which cells are cultured. A concave portion of the concave-convex pattern includes cell culture portions and micro flow channels communicating with the cell culture portions. The bottom surface of each of the cell culture portions has a width 1.0 to 20 times an equivalent diameter of each of the cultured cells. A cell adhesion-inducing substance is formed only on the bottom surface and the side walls of the concave portion.