Food or edible material: processes – compositions – and products – Treatment of live animal
Patent
1991-02-28
1992-07-28
Naff, David M.
Food or edible material: processes, compositions, and products
Treatment of live animal
426 69, 426807, 435115, 435843, A23K 100, A23K 122, C12P 1308
Patent
active
051339765
ABSTRACT:
A stable composition containing 35 to 48% lysine sulphate for animal nutrition is prepared by culturing a lysine-producing microorganism in a culture medium and adding sulfuric acid or ammonium sulphate during culturing to convert lysine as it is formed to lysine sulphate. The culture medium contains ammonia and ammonium sulphate, and a carbon source selected from glucose, sucrose and starch hydrolyzates in an amount such that the total weight ratio of fermentable substances/solids is greater than 80%. The concentration of the carbon source is maintained at 5 to 15 g/liter and ammonia is added during culturing to maintain an ammonium ion concentration of 1 to 5 g/liter. After allowing concentration of the carbon source to fall to less than 2 g/liter, culturing is stopped and the resultant cultured medium is concentrated and dried. The composition has good stability in moist air and preferably has a microporosity of about 0.3 cm.sup.3 /g and a surface area of about 0.5 m.sup.2 /g.
REFERENCES:
patent: 3527672 (1970-09-01), Kubota et al.
patent: 3871960 (1975-03-01), Kubota et al.
patent: 39359075 (1976-05-01), Inuzuka et al.
Naff David M.
Rhone-Poulenc Sante
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