Production of Riboflavin (Vitamin B2) With Ashbya Gossypii (Classic Reprint)

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Excerpt from Production of Riboflavin (Vitamin B2) With Ashbya Gossypii Characteristic colonies of.ashbya gossypii form.on a medium composed of peptone percent, yeastoextract percent, malt-extract percent, glucose percent, and agar percent.9'10 Colonies are circular, flat to slightly raised, and mold-like, attaining a diameter of 35 to 55 millimeters in 10 days at 27° to 30° C. To 86°. After 2 days of growth, colonies of riboflavin-producing strains begin to show yel low pigment (riboflavin) which in 7 to 10 days, intensifies to a brilliant orange-yellow. Sporadic production of the pigment often results in concentric ringing of colonies. After the second day of growth, the surface of the colonies is covered with numerous tiny, spiny projections. Under certain conditions (growth on thin layers of medium), riboflavin-pro ducing strains form pale yellow colonies which are flat and moist. Natural variation leading to substrains which produce lesser amounts of riboflavin occurs very infrequently. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.