Elwyn T. Reese's Advances in Enzymic Hydrolysis of Cellulose and Related PDF

By Elwyn T. Reese

ISBN-10: 0080099475

ISBN-13: 9780080099477

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Additional info for Advances in Enzymic Hydrolysis of Cellulose and Related Materials. Including a Bibliography for the Years 1950–1961

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Verrucaria and have shown that a limit (30 %) is rapidly reached after which no further loss can be detected. Although loss of strength is not perhaps capable of such precise interpretation in terms of molecular changes as, for example, loss of weight or development of reducing power, it is nevertheless the most important textile property. Moreover, as Blum and Stahl showed, significant losses of strength can be produced by culture filtrates acting on fibrous cellulose. O n the basis mainly of measurements of loss of strength we (the writer, C.

V I I . The Nature of the Substances With Which the Cellulose is Associated and the Nature of that Association As shown in Table 1, cellulose in cotton and wood is associated with a variety of other materials. Each of these substances has a characteristic influence on the susceptibility of the cellulose to enzymatic hydrolysis. The influence of each substance will be discussed in turn. Mineral content. Cellulose fibers usually contain about 1 % ash. The mineral elements contained in the ash include all those essential for the growth and development of cellulolytic micro-organisms.

Mandels and Reese have studied the induction of cellulase by various metal ions and have shown that cobalt is particularly stimu1 50 latory to cellulase production. Gascoigne and Gascoigne have summarized recent literature on the inhibition and activation of cellulases by various inorganic substances. They conclude that mercury, silver, copper, chromium, and zinc salts are generally inhibitory whereas manganese, cobalt, magnesium, and calcium in the presence of phosphate have been reported as stimulatory, though exceptions to these generalizations also have been reported.

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Advances in Enzymic Hydrolysis of Cellulose and Related Materials. Including a Bibliography for the Years 1950–1961 by Elwyn T. Reese


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