Abstract: A whey protein having a phosphorus content reduced to below 0.15 mg per gram of protein, a manufacturing method thereof, a low-phosphorus hydrolysate highly purified having a low phosphorus content. The method comprises the steps of adjusting pH of the solution containing the whey protein to below 4, and contacting the solution with a cation exchange resin, sequentially contacting the solution with an anion exchange resin, thereby reducing the phosphorus content to below 0.15 mg per gram of protein, and the highly purified low-phosphorus whey protein hydrolysate of the present invention is available by hydrolyzing the above-mentioned low-phosphorus whey protein with proteases.

Abstract: A magnetic recording medium having a magnetic layer and optionally a backing layer, wherein at least one of said magnetic layer and said backing layer contains a fungicide selected from the group consisting of 2-(4-thiazolyl) benzimidazole, N-(fluorodichloromethylthio)-phthalimide, N,N-dimethyl-N'-phenyl-N'-fluorodichloromethylthio-sulfamide.

Abstract: The combination of an optical information recording and reproducing medium and a container for storing said optical information recording and reproducing medium, at least one of said optical information recording and reproducing medium and said container comprising a fungicide wherein said fungicide is in a layer selected from the group consisting of a layer comprising fine metal particles dispersed in a hydrophilic colloid dispersion medium; a layer comprising a metal or an alloy formed by a vacuum evaporation method or a sputtering method; and a layer comprising a coloring substance or consisting essentially of a polymeric substance. The invention also provides said medium when it contains a fungicide and a method for making the claimed combination and components thereof.

Abstract: There is disclosed a light-sensitive silver halide photographic material comprising at least one hydrophilic colloid layer containing at least one compound represented by the following general formula [I]: ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 have the same meanings as defined in the specification.The light-sensitive silver halide photographic material according to this invention has excellent bacteriocidal properties and does not adversely affect photographic performance.