Abstract: A cruciferous plant, cut pieces thereof, and juice of the plant and the cut pieces are subjected to at least one treatment selected from the group consisting of anaerobic treatment, 25 to 50° C. thermal retention treatment, and glutamic acid treatment, to enrich &ggr;-aminobutyric acid (GABA), thereby obtaining a cruciferous plant, cut pieces, and juice containing GABA in various concentrations. By performing microwave radiation, blanching, drying, and the like for the GABA-enriched plant and the like as required, dried powder of the cruciferous plant, the cut pieces, and the juice, containing GABA in a high concentration and maintaining green color, is obtained. Food material, medicine material, and feed made of the cruciferous plant containing GABA in a high concentration are obtained.

Abstract: Fine-clustered water made from pure water is obtained by fine clustering treatment of pure water and is able to disperse at least about 1.5 times as much glyceryl trioleate as purified water can disperse.

Abstract: Young leaves of a grass plant selected from the group consisting of barley, wheat, rye, oats, adlay, Italian ryegrass, and rice, having &ggr;-aminobutyric acid, known as an antihypertensive substance, in which the amount of &ggr;-aminobutyric acid is enriched or retained, are provided. The content of &ggr;-aminobutyric acid in the young leaves is 500 mg/100 g or more in terms of dry weight. Young leaf powder, young leaf juice, and young leaf juice powder of the grass plant having &ggr;-aminobutyric acid in large amounts are also provided.

Abstract: The present invention provides a method for retaining or enriching &ggr;-aminobutyric acid in green grass leaves, which comprises the step of subjecting green grass leaves or processed products thereof to at least one treatment selected from the group consisting of incubation treatment, anaerobic treatment, and microwave treatment.

Abstract: Pure water discharged from a pure water tank 9 by means of a pump 27 is returned again to the tank 9 through a cyclic water channel 37. Midway in the cyclic water channel 37, a magnetic force generator 31 is provided. In the magnetic force generator 31, permanent magnets are arranged in such a manner that they interpose therebetween three water channels each made of a non-magnetic material and each having a long and narrow section and that magnetic poles of the magnets face each other outside the longer side of the section.