Abstract: The present invention provides a method for conveniently stabilizing an aqueous acrylamide solution using a stabilizer which can be separated and removed easily. In the method for stabilizing an aqueous acrylamide solution according to the present invention, a microbial cell is added to the aqueous acrylamide solution at a dried cell weight concentration of 1 to 14000 mg/L.

Abstract: The present invention provides a method for conveniently stabilizing an aqueous acrylamide solution using a stabilizer which can be separated and removed easily. In the method for stabilizing an aqueous acrylamide solution according to the present invention, a microbial cell is added to the aqueous acrylamide solution at a dried cell weight concentration of 1 to 14000 mg/L.

Abstract: In a method for producing an amide compound of the present invention including obtaining an amide compound from a nitrile compound using a microbial catalyst and transferring a solution containing the microbial catalyst and the amide compound, a positive-displacement pump is used for transferring the solution containing a microbial catalyst and an amide compound to obtain an amide compound having few impurities. A monomer including (meth)acrylamide obtained by the method for producing an amide compound is polymerized to prepare an acrylamide polymer having a high-molecular mass and high solubility and being colorless.

Abstract: This invention relates to a process for producing an amide compound from a nitrile compound using a microbial catalyst, wherein a microbial cell having nitrile hydratase activity of 50 U or higher per mg of dry cell at a reaction temperature of 10° C. is brought into contact with a nitrile compound in an aqueous medium without being immobilized. This method utilizes a microbial cell that exhibits high nitrile hydratase activity in the reaction without being entrap-immobilized. Thus, an amide compound can be effectively produced from a nitrile compound without problems of decreased reaction speed or lowered amount produced per unit cell amount, which are caused by entrap-immobilization. Accordingly, an amide compound can be produced within a very short period of time in the case of a batch reaction and with a very small-scale facility in the case of a continuous reaction.

Abstract: In a method for producing an amide compound of the present invention including obtaining an amide compound from a nitrile compound using a microbial catalyst and transferring a solution containing the microbial catalyst and the amide compound, a positive-displacement pump is used for transferring the solution containing a microbial catalyst and an amide compound to obtain an amide compound having few impurities. A monomer including (meth)acrylamide obtained by the method for producing an amide compound is polymerized to prepare an acrylamide polymer having a high-molecular mass and high solubility and being colorless.

Abstract: The object of the present invention is to obtain a highly soluble and colorless acrylamide polymer having a high molecular weight. A method for producing such acrylamide polymer involves comprises steps of: hydrating acrylonitrile containing oxazole at a concentration of 5 mg/kg or less and hydrogen cyanide at a concentration of 1 mg/kg or less by an enzymatic method to yield acrylamide; andt polymerizing monomers containing acrylamide.

Abstract: Provided is a method for producing a compound using a biocatalyst. In the method for continuously producing a compound using a biocatalyst in one or a plurality of reaction tanks, the downstream reaction temperature is set higher than the upstream reaction temperature of the flow of the catalyst in a reaction tank or between reaction tanks.

Abstract: A lure having a shape that represents a small fish, a bug, or the like, including a tail fin part, a dorsal fin part or a pectoral fin part made of soft material like synthetic resin, rubber or the like, and the remaining portion made of hard material.

Abstract: Provided is a method for producing a compound using a biocatalyst. In the method for continuously producing a compound using a biocatalyst in one or a plurality of reaction tanks, the downstream reaction temperature is set higher than the upstream reaction temperature of the flow of the catalyst in a reaction tank or between reaction tanks.

Abstract: This invention relates to a process for producing an amide compound from a nitrile compound using a microbial catalyst, wherein a microbial cell having nitrile hydratase activity of 50 U or higher per mg of dry cell at a reaction temperature of 10° C. is brought into contact with a nitrile compound in an aqueous medium without being immobilized. This method utilizes a microbial cell that exhibits high nitrile hydratase activity in the reaction without being entrap-immobilized. Thus, an amide compound can be effectively produced from a nitrile compound without problems of decreased reaction speed or lowered amount produced per unit cell amount, which are caused by entrap-immobilization. Accordingly, an amide compound can be produced within a very short period of time in the case of a batch reaction and with a very small-scale facility in the case of a continuous reaction.

Abstract: A process for producing an amide compound is described, wherein from a nitrile compound, the corresponding amide compound is produced by the action of nitrile hydratase, characterized in that the hydrocyanic acid concentration in a composition containing the nitrile compound is reduced by a chemical process, and thereafter nitrile hydratase acts on the nitrile compound. According to the invention, the decrease of the activity of the enzyme nitrile hydratase can be effectively suppressed so that an amide compound can be effectively produced from a nitrile compound.

Abstract: A method for purifying a nitrile which comprises contacting a nitrile containing an aldehyde with a cation exchange resin carrying a polyamine to remove the aldehyde from the nitrile. The ion exchange resin can be regenerated and reused repeatedly.