Abstract: A method for preparing a highly purified N-long chain acyl neutral amino acid for use of a detergent and the like in a simple and convenient manner and in a high yield by reacting a neutral amino acid such as glycine, &ggr;-aminobutyric acid, and alanine, with a saturated or unsaturated fatty acid halide having 8 to 22 carbon atoms, wherein the reaction is performed in a mixture of water and one or more kinds of hydrophilic organic solvents selected from the group consisting of acetone, acetonitrile, a secondary alcohol having 3 or 4 carbon atoms, and a tertiary alcohol having 4 carbon atoms such as isopropanol, sec-butanol, and tert-butanol in the presence of a base.

Abstract: A cosmetic composition for skin and/or hair, which comprises at least one kind of substance selected from the group consisting of an N&agr;,NG-di-acylarginine, for example, a compound represented by the following general formula (I): 1

Abstract: The object of the present invention is to provide a cutting oil composition excellent in solubility, lubricity, cutting properties, antirust ability, safety, and washing ability and reduced in foaming, and for that purpose, an N-acylamino acid having a long chain acyl group and/or a salt thereof, or an N-alkylamino acid having a long chain alkyl group and/or a salt thereof is used concurrently with an alkylalkylene oxide and/or an acylalkylene oxide.

Abstract: A method for preparing a highly purified N-long chain acyl neutral amino acid for use of a detergent and the like in a simple and convenient manner and in a high yield by reacting a neutral amino acid such as glycine, &ggr;-aminobutyric acid, and alanine, with a saturated or unsaturated fatty acid halide having 8 to 22 carbon atoms, wherein the reaction is performed in a mixture of water and one or more kinds of hydrophilic organic solvents selected from the group consisting of acetone, acetonitrile, a secondary alcohol having 3 or 4 carbon atoms, and a tertiary alcohol having 4 carbon atoms such as isopropanol, sec-butanol, and tert-butanol in the presence of a base.

Abstract: Herein is disclosed a cosmetic composition comprising, as active ingredients, one or more members selected from the group consisting of mono-N&agr;-acylarginines and cosmetic powders whose surfaces have been treated with a mono-N&agr;-acylarginine (Ingredient A) and one or more members selected from the group consisting of polyhydric alcohols (Ingredient B), which cosmetic composition is excellent in conditioning effects such as moist feeling and voluminous feeling in the case of hair cosmetics and excellent in feelings upon use such as smoothening property and moist feeling without sticky feeling and occlusive feeling in the case of skin cosmetics.

Abstract: Herein is disclosed a cosmetic composition comprising, as active ingredients, one or more members selected from the group consisting of mono-N&agr;-acylarginines and cosmetic powders whose surfaces have been treated with a mono-N&agr;-acylarginine (Ingredient A) and one or more members selected from the group consisting of water-soluble polymers and alcohol-soluble polymers (Ingredient B), which cosmetic composition is excellent in conditioning effects such as moist feeling and voluminous feeling in the case of hair cosmetics and excellent in feelings upon use such as smoothening property and moist feeling without sticky feeling and occlusive feeling in the case of skin cosmetics.

Abstract: There are provided cosmetics which have not only a reduced effect on the “gleam” caused by irregular light reflection but also a reduced effect on “stickiness” based on an oil raw material, giving a good feeling during use such as spreadability, etc., and being excellent in the sustaining of the makeup effect. There are used N&egr;-long chain acyllysine crystals whose average diameter or mode diameter lies in the range of 3˜15 &mgr;m without being subjected to the mechanical pulverization.

Abstract: A compound represented by the following general formula (I), wherein R1 and R2 represent a hydrocarbon group having 1 to 26 carbon atoms, preferably a linear or branched alkyl group, R3 represents a hydrocarbon group having 7 to 10 carbon atoms, preferably a linear or branched alkyl group, n represents 1 or 2 provided that the acidic amino acid residue in the molecule is L-aspartic acid residue when n is 1 and said acidic amino acid residue is L-glutamic acid residue when n is 2, and a gelling agent for an oil comprising said compound.