Download or read book Fundamental Study of the Mechanism and Kinetics of Cellulose Hydrolysis by Acids and Enzymes Final Report June 1 1978 January 31 1981 written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: There are three basic enzymes (e.g., endoglucanase (C3, exoglucanase (C1) and cellobiase) comprising the majority of extracellular cellulase enzymes produced by the cellulolytic mycelial fungi, Trichoderma reesei, and other cellulolytic microorganisms. The enzymes exhibited different mode of actions in respect to the hydrolysis of cellulose and cellulose derived oligosaccharides. In combination, these enzymes complimented each other to hydrolyze cellulose to its basic constituent, glucose. The kinetics of cellobiase were developed on the basis of applying the pseudo-steady state assumption to hydrolyze cellobiose to glucose. The results indicated that cellobiase was subjected to end-product inhibition by glucose. The kinetic modeling of exoglucanase (C1) with respect to cellodextrins was studied. Both glucose and cellobiose were found to be inhibitors of this enzyme with cellobiose being a stronger inhibitor than glucose. Similarly, endoglucanase (C3 is subject to end-product inhibition by glucose. Crystallinity of the cellulose affects the rate of hydrolysis by cellulases. Hence, the changes in crystallinity of cellulose in relation to chemical pretreatment and enzyme hydrolysis was compared. The study of cellulase biosynthesis resulted in the conclusion that exo- and endo-glucanases are co-induced while cellobiase is synthesized independent of the other two enzymes. The multiplicity of cellulase enzymes are the end results of post-translational modification during and/or after the secretion of enzymes into growth environment.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1981 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fundamental Study of the Mechanism and Kinetics of Cellulose Hydrolysis by Acids and Enzymes Progress Report June 1 1975 December 31 1975 written by and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This project deals with acidic and enzymatic hydrolysis of cellulosic materials. Highlights of the first eight months of out project are as follows. (1) Essentially homogeneous C1, C3 and Cellobiase enzyme have been isolated from Cellulase-Onozuka of Trichodeima viride origin. Besides the 3 major components, one protein of a molecular weight of 10,000 was purified, which has strong C3 activity and also another (M.W. 23,000) with strong C1 activity. (2) Kinetics of Cellobiase has been investigated and its kinetics constant accurately determined. Immobilization of this enzyme on porous glass was successful. (3) Absorption of SO2 at atmospheric pressure increased digestibility of delignated cellulose but not the natural materials such as corn stalk. A pressurizable absorption unit is being built. (4) Kinetics models for purified C1 and C3 are postulated and equations derived. Experimental tests will be made when sufficient quantities of purified C1 and C3 enzyme are prepared. (5) A lignin digesting, white-rot fungus, Pleurotus ostreatus, has cultivated in our laboratory. It has grown well and heavy. (6) A number of electron micrographs were made with untreated cellulosic materials, which showed that the method of drying the specimens for electromicroscopy is important. Ordinary drying procedures will alter their physical structures. A technique, critical point drying, is being practiced, which will not change the structure. (auth).
Download or read book Solar Energy Update written by and published by . This book was released on 1981 with total page 698 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the Symposium on Biotechnology for Fuels and Chemicals written by and published by . This book was released on 1985 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1981 with total page 1192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1981 with total page 1374 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seventh Symposium on Biotechnology for Fuels and Chemicals written by Charles D. Scott and published by John Wiley & Sons. This book was released on 1986 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today, much research and development for advanced biotechnology is directed toward biomedical applications; however, exciting new concepts for bioprocessing continue to be developed for fuel and chemical production.
Download or read book Cellulose Hydrolysis written by Liang-tseng Fan and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent economic trends, especially the worldwide decline in oil prices, and an altered political climate in the United States have combined to bring about major reductions in research on renewable energy resources. Yet there is no escaping the "facts of life" with regard to these resources. The days of inexpensive fossil energy are clearly numbered, the credibility of nuclear energy has fallen to a new low, and fusion energy stands decades or more from practical realization. Sooner than we may wish ,we will have to turn to renewable raw materials - plant "biomass" and, especially, wood - as significant suppliers of energy for both industry and everyday needs. It is therefore especially important to have a single, comprehensive and current source of information on a key step in any process for the technological exploitation of woody materials, cellulose hydrolysis. Further more, it is essential that any such treatment be unbiased with respect to the two methods - chemical and biochemical - for the breakdown of cellulose to sugars. Researchers on cellulose hydrolysis have frequently been chided by persons from industry, especially those individuals concerned with determining the economic feasibility of various technological alternatives. They tell us that schemes for the utilization of wood and other such resources fly in the face of economic realities.
Download or read book Enzymatic Hydrolysis of Cellulose written by Dale Francis Wiley and published by . This book was released on 1985 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanism of Depolymerization of Cellulose in Low Sulfuric Acid Medium Kinetic Investigation and Stochastic Simulation written by Zin Eddine Dadach and published by GRIN Verlag. This book was released on 2018-02-02 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt: Doctoral Thesis / Dissertation from the year 1994 in the subject Engineering - Chemical Engineering, grade: 3.7, Université Laval, language: English, abstract: The final objective of this investigation is to model the kinetic behaviour of cellulose during hydrolysis by means of stochastic simulation. Part I of this study will thus report the experimental determination of kinetic parameters to be used in the simulation. These were established from kinetic experiments on cellobiose hydrolysis and glucose degradation. Furthermore, both cotton morphology and outer layer are analysed and the effects of cotton wax on cellulose depolymerization are studied. Finally, the effects of cotton milling on both cellulose depolymerization and glucose yield are investigated and presented in this first part. Part II will deal more specifically with the stochastic modelling of these data. This simulation should be realistic enough to allow a representation of the effect of milling on the cellulose structure and its influence on acid hydrolysis kinetics.
Download or read book Hydrolysis of Cellulose written by Ross D. Brown and published by . This book was released on 1979 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrolysis of Cellulose written by Ross D. Brown, Jr. and published by . This book was released on 1979-01-01 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Kinetics of the Enzymatic Hydrolysis of Cotton Cellulose by Cellulase written by Ajoy Kumar Sarkar and published by . This book was released on 2000 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrolysis of Cellulose Mechanisms of Enzymatic and Acid Catalysis written by and published by . This book was released on 1979 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Study of Enzyme Adsorption and Reaction Kinetics for Cellulose Hydrolysis written by Ivan Gale Gilbert and published by . This book was released on 1984 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Enzymatic Hydrolysis of Cellulose written by Larry Phillip Walker and published by London ; New York : Elsevier Applied Science. This book was released on 1991-01-01 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
