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Author: Françoise Delpech-Barrie
Publisher:
ISBN:
Category :
Languages : fr
Pages : 241
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Book Description
LE MEMOIRE FAIT LE POINT SUR L'UTILISATION INDUSTRIELLE DE L'OXYGENE POUR LE BLANCHIMENT DES PATES CELLULOSIQUES ET LA DELIGNIFICATION DES VEGETAUX. RELATIVEMENT A LA DELIGNIFICATION DES PATES CELLULOSIQUES, LE PROCEDE CLASSIQUE UTILISANT O#2 EN MILIEU ALCALIN, PERMET DE REALISER UNE DELIGNIFICATION COMPLEMENTAIRE IMPORTANTE MAIS ENTRAINE UNE DEGRADATION DES POLYSACCHARIDES. CE PHENOMENE EST SOIGNEUSEMENT ANALYSE ET DES POSSIBILITES DE PROTECTION DE LA CELLULOSE SONT PROPOSEES. PARALLELEMENT A LA TECHNIQUE HABITUELLE, DEUX INNOVATIONS SONT PRESENTEES: LA DELIGNIFICATION PAR O#2 EN MILIEU SOLVANT ORGANIQUE-EAU ET, PLUS SIMPLEMENT ENCORE, O#2 EN MILIEU AQUEUX. UNE DEUXIEME PARTIE ABORDE LA DELIGNIFICATION DES VEGETAUX. L'ETUDE TRES ORIGINALE DU PROCEDE DE DELIGNIFICATION PAR O#2 EN MILIEU ACETONE-EAU PERMET DE MONTRER QUE LE TRANSFERT DE O#2 DE LA PHASE GAZEUSE VERS LES FIBRES EST L'ETAPE LIMITANTE DU PHENOMENE. CETTE CONCLUSION, TRANSPOSEE AU CAS DES CUISSONS O#2-NAOH, PERMET, NON SEULEMENT D'EXPLIQUER LES ECHECS SYSTEMATIQUES DE DELIGNIFICATION DIRECTE DES VEGETAUX EN UNE SEULE PHASE, MAIS SURTOUT DE DEFINIR DES CONDITIONS DEBOUCHANT SUR DES RESULTATS POSITIFS. UNE INTERPRETATION THEORIQUE DES MECANISMES DE DELIGNIFICATION PAR L'OXYGENE, EN PARFAIT ACCORD AVEC LES VALEURS EXPERIMENTALES TROUVEES, EST FINALEMENT PROPOSEE
Author: Françoise Delpech-Barrie
Publisher:
ISBN:
Category :
Languages : fr
Pages : 241
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Book Description
LE MEMOIRE FAIT LE POINT SUR L'UTILISATION INDUSTRIELLE DE L'OXYGENE POUR LE BLANCHIMENT DES PATES CELLULOSIQUES ET LA DELIGNIFICATION DES VEGETAUX. RELATIVEMENT A LA DELIGNIFICATION DES PATES CELLULOSIQUES, LE PROCEDE CLASSIQUE UTILISANT O#2 EN MILIEU ALCALIN, PERMET DE REALISER UNE DELIGNIFICATION COMPLEMENTAIRE IMPORTANTE MAIS ENTRAINE UNE DEGRADATION DES POLYSACCHARIDES. CE PHENOMENE EST SOIGNEUSEMENT ANALYSE ET DES POSSIBILITES DE PROTECTION DE LA CELLULOSE SONT PROPOSEES. PARALLELEMENT A LA TECHNIQUE HABITUELLE, DEUX INNOVATIONS SONT PRESENTEES: LA DELIGNIFICATION PAR O#2 EN MILIEU SOLVANT ORGANIQUE-EAU ET, PLUS SIMPLEMENT ENCORE, O#2 EN MILIEU AQUEUX. UNE DEUXIEME PARTIE ABORDE LA DELIGNIFICATION DES VEGETAUX. L'ETUDE TRES ORIGINALE DU PROCEDE DE DELIGNIFICATION PAR O#2 EN MILIEU ACETONE-EAU PERMET DE MONTRER QUE LE TRANSFERT DE O#2 DE LA PHASE GAZEUSE VERS LES FIBRES EST L'ETAPE LIMITANTE DU PHENOMENE. CETTE CONCLUSION, TRANSPOSEE AU CAS DES CUISSONS O#2-NAOH, PERMET, NON SEULEMENT D'EXPLIQUER LES ECHECS SYSTEMATIQUES DE DELIGNIFICATION DIRECTE DES VEGETAUX EN UNE SEULE PHASE, MAIS SURTOUT DE DEFINIR DES CONDITIONS DEBOUCHANT SUR DES RESULTATS POSITIFS. UNE INTERPRETATION THEORIQUE DES MECANISMES DE DELIGNIFICATION PAR L'OXYGENE, EN PARFAIT ACCORD AVEC LES VALEURS EXPERIMENTALES TROUVEES, EST FINALEMENT PROPOSEE
Author:
Publisher:
ISBN:
Category : Cellulose
Languages : en
Pages : 732
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Book Description
Author: Matheus Poletto
Publisher: BoD – Books on Demand
ISBN: 9535122290
Category : Science
Languages : en
Pages : 286
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Book Description
Cellulose - Fundamental Aspects and Current Trends consists of 10 chapters written by international subject matter experts investigating the characteristics and current applications of this fascinating material. This book will help the reader to develop a deeper understanding about the concepts related to cellulose and the nanocellulose structure, modification, production, dissolution, and application. Biosynthesis mechanisms and medical applications of microbial cellulose are also discussed. This book will serve as the starting point for materials science researchers, engineers, and technologists from diverse backgrounds in physics, chemistry, biology, materials science, and engineering who want to know and better understand the unique characteristics of the most abundant biopolymer on earth.
Author: Marja-Sisko Ilvessalo-Pfäffli
Publisher: Springer Science & Business Media
ISBN: 3662072122
Category : Technology & Engineering
Languages : en
Pages : 400
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Book Description
This richly-illustrated book presents the information necessary for fiber analysis in the field of pulp and paper. A discussion of raw-material structure and the features used for species identification in pulp is followed up by the description of 117 fiber species. Of these, 83 are wood fibers and 34 are of nonwood origin. The tree species range across all five continents, 29 from Eurasia, 38 from North America and 16 from the southern hemisphere and the tropics. Informative micrographs, identification tables, and distribution maps aid species differentiation, making this atlas ideal for everyone interested in fiber identification.
Author: David N.-S. Hon
Publisher: Marcel Dekker
ISBN:
Category : Science
Languages : en
Pages : 1100
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Book Description
Details the basics of wood formation, structure, and chemistry, by describing both fundamental and applied studies. Reviews Japanese approaches on wood chemistry research and interpretation of data, examines chemical modifications of wood and its constituents, and introduces biomass conversion. Topi
Author: Ryszard M. Kozlowski
Publisher: Woodhead Publishing
ISBN: 0128190701
Category : Science
Languages : en
Pages : 754
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Book Description
The Handbook of Natural Fibres: Volume Two, Processing and Applications, Second Edition provides detailed coverage of the latest processing techniques and industrial applications of a wide range of natural fibers. Natural fibrous resources, both lignocellulosic and protein ones, are renewable, biodegradable, and nontoxic, making them an important source of sustainable textile solutions. A broad range of sources of natural fibers are covered in the book, including flax, hemp, bast, jute, coir, linen, cotton and silk. This wealth of expert information provides a uniquely detailed reference for the processing, characterization, selection and application of natural fibers. - Connects natural fibers to a wide range of industries, including construction, automotive, packaging and medical - Helps readers appraise natural fibers on the basis of their mechanical, electrokinetic, antimicrobial or flame retardant qualities - Provides a rare glimpse of emerging manufacturing methods for silk
Author: Alain Dufresne
Publisher: Walter de Gruyter
ISBN: 3110254603
Category : Science
Languages : en
Pages : 476
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Book Description
This specialist monograph provides an overview of the recent research on the fundamental and applied properties of nanoparticles extracted from cellulose, the most abundant polymer on the planet and an essential renewable resource. Given the rapid advancements in the field and the high level of interest within the scientific and industrial communities, this timely book will be required reading for all those working with nanocellulose in the life sciences and bio-based applications, biological, chemical and agricultural engineering, organic chemistry and materials science. The author pioneered the use of cellulose nanoparticles (cellulose nanocrystals or whiskers and cellulose microfibrils) in nanocomposite applications.The book combines a general introduction to cellulose and basic techniques with more advanced chapters on specific properties and applications of nanocellulose.
Author: Canada. Patent Office
Publisher:
ISBN:
Category : Copyright
Languages : un
Pages : 1236
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Book Description
Includes annual cumulative index of inventors and patentees.
Author: Bertie Lee Browning
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 532
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Book Description
Author: Charles B. Beck
Publisher: Cambridge University Press
ISBN: 1139486365
Category : Science
Languages : en
Pages : 465
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Book Description
A plant anatomy textbook unlike any other on the market today. Carol A. Peterson described the first edition as 'the best book on the subject of plant anatomy since the texts of Esau'. Traditional plant anatomy texts include primarily descriptive aspects of structure, this book not only provides a comprehensive coverage of plant structure, but also introduces aspects of the mechanisms of development, especially the genetic and hormonal controls, and the roles of plasmodesmata and the cytoskeleton. The evolution of plant structure and the relationship between structure and function are also discussed throughout. Includes extensive bibliographies at the end of each chapter. It provides students with an introduction to many of the exciting, contemporary areas at the forefront of research in the development of plant structure and prepares them for future roles in teaching and research in plant anatomy.
