Abstract: A 1,2,3-thiadiazole derivative represented by general formula (I) or a salt thereof: wherein R1 is H, (halo) C1-C4 alkyl, 5- or 6-membered heterocycle containing 1 to 3 same or different O, N or S or the like, A is a group of the following formulas: wherein R2 and R3 are H, halogen, cyano, formyl, alkylthio, alkoxycarbonyl, substituted or unsubstituted phenyl, or the like, or R2 and R3, taken conjointly, may form a 3- to 7-membered ring including a C2-C6 alkylene group which may be intercepted by —O—, —S(O)n— (n is 0-2), —CO— or —NR8— (R8 is H, halogen or the like), B is cyano or an unsubstituted or substituted 5- or 6-membered heterocycle containing 1-3 hetero atoms selected from O, N and S, and m is 0-4; salts thereof; an agrohorticultural disease controller containing said derivative or salt; and method for using said disease controller.

Abstract: A 1,2,3-thiadiazole derivative represented by general formula (I) or a salt thereof: wherein R1 is H, (halo) C1-C4 alkyl, 5- or 6-membered heterocycle containing 1 to 3 same or different O, N or S, A is a group of the following formulas: wherein R2 and R3 are H, halogen, cyano, formyl, alkylthio, alkoxycarbonyl, substituted or unsubstituted phenyl, B is cyano or an unsubstituted or substituted 5- or 6-membered heterocycle containing 1-3 hetero atoms selected from O, N and S, and m is 0-4; an agrohorticultural disease controller containing said derivative.

Abstract: A process for producing a tinted contact lens, which includes dissolving a soluble vat dye in a monomer capable of dissolving the soluble vat dye therein, mixing the monomer having the soluble vat dye dissolved therein and other monomers, polymerizing the monomer mixture and processing the resulting polymer into a shape of a contact lens.

Abstract: A method for treating the surface of an oxygen permeable hard contact lens, which comprises applying high-frequency glow discharge treatment to an oxygen permeable hard contact lens made of a copolymer consisting essentially of at least one monomer selected from the group consisting of a silicone-containing (meth)acrylate, a fluorine-containing (meth)acrylate, a silicone-containing styrene and a fluorine-containing styrene, in a gas atmosphere of at least one member selected from the group consisting of helium, neon, argon and nitrogen gas, containing substantially no oxygen.

Abstract: A method for treating the surface of an oxygen permeable hard contact lens, which comprises applying high-frequency glow discharge treatment to an oxygen permeable hard contact lens made of a copolymer consisting essentially of a silicone-containing (meth)acrylate and/or a fluorine-containing (meth)acrylate, in a gas atmosphere of at least one member selected from the group consisting of helium, neon, argon and nitrogen gas, containing substantially no oxygen.

Abstract: A contact lens material composed of a copolymer of a monomer mixture comprising, as essential monomers, from 5 to 20 parts by weight, based on 100 parts by weight of the total monomer mixture, of a hydrophilic monomer consisting of from 40 to 60 mol % of N-vinyl-2-pyrrolidone and from 40 to 60 mol % of metharylic acid and from 30 to 95 parts by weight, based on 100 parts by weight of the total monomer mixture, of at least one of a silicon-containing acrylate and a silicon-containing methacrylate.

Abstract: A soft contact lens made of a copolymer composed essentially of:(a) from about 30 to about 60 parts by weight of at least one monomer selected from the group consisting of long chain alkyl acrylates and methacrylates represented by the general formula: ##STR1## where R.sub.1 is a hydrogen atom or a methyl group, and R.sub.2 is a straight chained or branched alkyl group having from 5 to 18 carbon atoms;(b) from about 40 to about 70 parts by weight of at least one hydrophilic monomer selected from the group consisting of dimethylacrylamide, N-vinylpyrrolidone, a hydroxyalkyl acrylate and a hydroxyalkyl methacrylate; and(c) from about 0.05 to about 2.0 parts by weight of a cross-linking agent; and having a water content of from about 25 to about 50% by weight.