agar

(ah'(a')gar) [Bengalese.] (U.S.) gelatinous substance prepared from seaweed in Japan and India, used in the East to thicken soup; ' largely used as a base for culture media in bacteriology; when unqualified, it is usually, and properly, called agar-agar, beer-wort a., beerwort made from crushed malt, to which is added 2 per cent. agar, blood a., a mixture of blood and a., used for the cultivation of trypanosomes. chol'era a., an alkaline agar medium for cultures of the cholera vibrio; it is made by di olving by heat agar, 30, in nutrient bouillon, 1000; and ac^ding a 10 per cent, solution of pota ium hydrate, 30. Drigal's ki-Conra'di a., a nutrient a. containing horse-meat infusion, Witte's peptone, nutrose, sodium chloride, lactose, litmus, and crystal violet, used in the differentiation of the typhoid bacillus. En'do's fuch's in a., nutrient a. containing lactose, alcoholic solution of fuchsin, sodium sulphite, and soda solution, used as a culture medium to differentiate the typhoid bacillus from the colon bacillus and others of that group, gel'at in a., made by di olving peptone, gelatin, glucose or mannite, sodium chloride, and pota ium chloride in water and adding • agar, glu'cose a., nutrient a., containing 2 per cent, glucose, glyc'erln a., nutrient a. containing 5 per cent.'glycerin. Guarnie'ri's gel'at in a., similar to Stoddart's gelatin a., used for the cultivation of the pnSumococcus. lac'tose-lit'mus a., made by adding 2 per cent, lactose and litmus to acid-free nutrient agar, used in the diflerentiation of the typhoid bacillus. MacConk'ey'a