Nitrogen containing polysaccharide and process for preparing same
AssigneeKureha Kagaku Kogyo Kabushiki Kaisha
InventorsKiro Asano, Tsuyoshi Saito, Masayoshi Hatanaka, Susumu Ikeda
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Abstract
A novel product comprising nitrogen-containing polysaccharides is produced by bringing a culture product of fungi Basidiomycetes into reaction with an aqueous ammoniacal solution at a temperature of 100.degree. to 250.degree. C. The product is remarkably effective in controlling various plant viruses.
Claims6
A product consisting of nitrogen-containing polysaccharides of the elementary composition of 38-50% of carbon, 2.5-10% of nitrogen, 5.5-7.5% of hydrogen and the balance of oxygen, having a systemic anti-plant viral activity, molecular weights between 500 and 10,000 and a characteristic infrared absorption band at about 1620 cm.sup.-1, obtained by bringing a culture product of a fungus Basidiomycetes into reaction with an aqueous ammoniacal solution of the normality of 0.03 to 17 N, at a temperature of 150.degree.-250.degree. C. under pressure of said aqueous ammoniacal solution at said reaction temperature and by filtering the reaction product then by drying the filtered solution.
A process for producing a product consisting of nitrogen-containing polysaccharides of the elemental composition of 38-50% of carbon, 2.5-10% of nitrogen, 5.5-7.5% of hydrogen and the balance of oxygen, having a molecular weight range of 500-10,000, showing a characteristic infrared absorption band at about 1620 cm.sup.-1 and having a systemic anti-plant viral activity by bringing a culture product of a fungus Basidiomycetes into reaction with an aqueous ammoniacal solution of the normality of 0.03 to 17 N, at a temperature of 150.degree.-250.degree. C. under pressure of said aqueous ammoniacal solution at said reaction temperature, then by filtering the reaction product and then purifying the filtrate and drying said purified filtrate.
Dependencies are inferred from the claim text.