Abstract: Provided is a hair-treatment composition containing: a first amphoteric surfactant having a structure represented by general formula (1) below; at least one type of second amphoteric surfactant selected from the group consisting of fatty acid amide propyldimethylaminoacetic acid betaines, alkyldimethylaminoacetic acid betaines, N-acylaminoethyl-N-2-hydroxyethylaminocarboxylic acid salts and N-acylaminoethyl-N-carboxymethoxyethylaminocarboxylic acid salts fatty acid amide propyldimethylaminoacetic acid betaines, alkyldimethylaminoacetic acid betaines; and an acidic amino acid. In general formula (1), R1 represents an alkyl group the carbon number of which is 6 to 20; R2 represents a methyl group, an ethyl group, or a hydroxyethyl group; R3 represents a methyl group, an ethyl group, or a —CH2COOH group; and n is an integer from 1 to 3.

Abstract: Provided is a hair-treatment composition containing: a first amphoteric surfactant having a structure represented by general formula (1) below; at least one type of second amphoteric surfactant selected from the group consisting of fatty acid amide propyldimethylaminoacetic acid betaines, alkyldimethylaminoacetic acid betaines, N-acylaminoethyl-N-2-hydroxyethylaminocarboxylic acid salts and N-acylaminoethyl-N-carboxymethoxyethylaminocarboxylic acid salts fatty acid amide propyldimethylaminoacetic acid betaines, alkyldimethylaminoacetic acid betaines; and an acidic amino acid. In general formula (1), R1 represents an alkyl group the carbon number of which is 6 to 20; R2 represents a methyl group, an ethyl group, or a hydroxyethyl group; R3 represents a methyl group, an ethyl group, or a —CH2COOH group; and n is an integer from 1 to 3.

Abstract: According to the electromagnetic cooking apparatus of the present invention, a ventilation hole, through which air after cooling an interior compartment of the main casing of the cooking apparatus is exhausted, communicates with the exhaust passage of the exhaust device so that the suction force of a fan member of the exhaust device is also utilized for exhausting the cooling air, thereby contributing to an improvement in the exhausting efficiency of the cooking apparatus, and the fact that a relatively small fan motor for the cooling device can be used. Consequently the cooling device can be small, which in turn enables the size of the electromagnetic cooking apparatus itself to be relatively small.