. Cultural studies of species of Penicillium. Penicillium -- Cultures and culture media; Fungi -- Cultures and culture media. 64 CULTUBAL STUDIES OF SPECIES OF PENICILL1UM. CULTURAL DATA. Color light blue-green, olive, or gray in various media; reverse, white or cream; color in media, none or slightly yellowish. Odor, none. Fifteen per cent gelatin in water, small olive-green colonies; liquefaction, rapid— 6 to 7 days; litmus reaction, alkaline. Potato agar and bean agar, typical. Potato plugs, typical. Raulin's fluid, typical. Cohn's solution, slow and weak-growing colony. Synthetic fluid (Do
. Cultural studies of species of Penicillium. Penicillium -- Cultures and culture media; Fungi -- Cultures and culture media. 64 CULTUBAL STUDIES OF SPECIES OF PENICILL1UM. CULTURAL DATA. Color light blue-green, olive, or gray in various media; reverse, white or cream; color in media, none or slightly yellowish. Odor, none. Fifteen per cent gelatin in water, small olive-green colonies; liquefaction, rapid— 6 to 7 days; litmus reaction, alkaline. Potato agar and bean agar, typical. Potato plugs, typical. Raulin's fluid, typical. Cohn's solution, slow and weak-growing colony. Synthetic fluid (Dox's), carbon supplied as: Cane sugar, good growth even up to 60 per cent, acid reaction. Lactose, 3 per cent, slow abnormal growth. Lactic acid, per cent, small but characteristic colony. Levulose, 3 per cent, small colo-. Fig. 2Z.—Penicillium No. 37: a, typical branched fructification, two verticils of conidiiferouscells (XI,600); 6, c, conidiiferous cell and conidia (X 1,600); d, e, sketches of conidial fructifications from potato-agar culture (X 140); /, g, sketches from an old culture on 3 per cent cane-sugar agar, showing simple (g) and branched (/) forms (X 140); h, j, fc, branching of conidiophore, swollen ends of branches (X 1,600); I, m, germination of conidia (X 1,600). nies. Galactose, 3 per cent, typical. Glycerin, 3 per cent, small growth. Potato starch, typical. Butterfat, slow growth, deep heavy green colony. Milk, curdling ( per cent calcium chlorid added), rapid;0 digestion rapid and complete; color, none. At 37° C, killed; check at 20° C, grew well. PENICILLIUM No. 12. This form differs from P. citrinum in producing no coloration of the medium and in producing conidial fructifications in which the chains of conidia are more or less divergent instead of aggregated into columns. In culture there is general corre- ct The time of curdling is almost impossible to determine in cases where digestion begins quickly and progresses Please note th
Size: 1644px × 1519px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublisherwashi, bookyear1910
