Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Valorisation De Fibres De Papiers Recuperes Par Traitement Chimique De Delignification
Download Valorisation De Fibres De Papiers Recuperes Par Traitement Chimique De Delignification full books in PDF, epub, and Kindle. Read online Valorisation De Fibres De Papiers Recuperes Par Traitement Chimique De Delignification ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Valorisation de fibres de papiers récupérés par traitement chimique de délignification by : Rabi Behrooz Eshkiki
Download or read book Valorisation de fibres de papiers récupérés par traitement chimique de délignification written by Rabi Behrooz Eshkiki and published by . This book was released on 2006 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les pâtes recyclées sont constituées de mélanges de pâtes mécanique et chimique dont les fibres se différencient structuralement et chimiquement. L'étude présentée vise à appréhender les facteurs déterminants de la réactivité chimique de ces mélanges avec des réactifs oxydants de blanchiment. Le rapport du taux de lignine sur l'indice Kappa est un bon indice d'oxydabilité de la lignine des pâtes. La valeur obtenue pour la pâte kraft est de 30% inférieure à celle de la pâte mécanique, ce qui s'explique principalement par l'importance des teneurs en fonctions OH phénoliques de la lignine. Ceci a été confirmé par modification chimique (diazométhane et periodate de sodium), par analyse spectroscopique IRFT et RMN 13C et par l'étude de composés modèles de lignine. Une méthode originale et simple d'analyse in situ des fonctions OH phénoliques présentes dans les pâtes a été développée, basée sur la réactivité spécifique du dioxyde de chlore sans interférence avec les autres structures chimiques de la lignine. La méthode a été testée sur des composés modèles de lignine et comparée avec la RMN 13C. Les évolutions des teneurs en OH phénoliques sur des pâtes traitées par des agents de blanchiment ont été comparées, ainsi que les effets des stades alcalins. Les résultats obtenus confortent en général les mécanismes réactionnels présentés dans la littérature. En complément, une méthode d'analyse in situ des fonctions quinones a été développée, fondée sur le dosage dès OH phénoliques après réduction des quinones. Les résultats obtenus recoupent assez bien les données d'analyse par RMN 31 P, seule méthode comparative permettant de situer un ordre de grandeur de ces fonctions.
Book Synopsis Advances in Solid State Fermentation by : S. Roussos
Download or read book Advances in Solid State Fermentation written by S. Roussos and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 641 pages. Available in PDF, EPUB and Kindle. Book excerpt: G.HAINNAUX Departement Milieu et Activites Agricoles, Centre ORSTOM, 911 Avenue d' Agropolis, B.P. 5045, 34032 Montpellier Cedex , France. Solid state fermentation, popularly abbreviated as SSF, is currently investigated by many groups throughout the world. The study of this technique was largely neglected in the past in European and Western countries and there is now a high demand for SSF, meaning in food, environment, agricultural, phannaceutical and many other biotechnological applications. It gives me satisfaction to note that the importance of this technique was realised at my department way back in 1975 since then, our team has put concentrated efforts on developing this technique. xvii Foreword Advances in Solid State Fermentation Foreword M. PUYGRENIER Agropolis Valorisation, Avenue d' Agropolis, 34394 Montpellier Cedex 5, France. On the name of the Scientific Community, I would like to express the wish that this International Symposium on SSF should be successful. Solid State Fermentation is part of biotechnology research. It consists on seeding solid culture medium with bacteria or fungi (filamentous or higher) and on producing, in this medium (solid components and exudates) metabolites and high value products. In fact, this process is very old. In older industries such the food and agricultural, this technique has been extensively used. An example of this is the production of pork sausages and Roquefort cheese. Pharmaceutical industry could make extensive use of SSF in the production of secondary metabolites of many kinds and development in this direction is soon expected.
Book Synopsis Solid-State Fermentation Bioreactors by : David A. Mitchell
Download or read book Solid-State Fermentation Bioreactors written by David A. Mitchell and published by Springer Science & Business Media. This book was released on 2006-08-02 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: This concise professional reference provides a fundamental framework for the design and operation of solid-state fermentation bioreactors, enabling researchers currently working at laboratory scale to scale up their processes. The authors survey bioreactor types in common use, and describe in depth how to plan a project, and model heat transfer phenomena. The book includes case studies, and a review of practical issues involved in bioreactor performance.
Book Synopsis Advances in Bioprocess Engineering by : Enrique Galindo
Download or read book Advances in Bioprocess Engineering written by Enrique Galindo and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bioprocess engineering has played a key role in biotechnology, contributing towards bringing the exciting new discoveries of molecular and cellular biology into the applied sphere, and in maintaining established processes, some centuries-old, efficient and essential for today's industry. Novel developments and new application areas of biotechnology, along with increasing constraints in costs, product quality, regulatory and environmental considerations, have placed the biochemical engineer at the forefront of new challenges. This second volume of Advances in Bioprocess Engineering reflects precisely the multidisciplinary nature of the field, where new and traditional areas of application are nurtured by a better understanding of fundamental phenomena and by the utilization of novel techniques and methodologies. The chapters in this book were written by the invited speakers to the 2nd International Symposium on Bioprocess Engineering, Mazatlan, Mexico, September 1997.
Book Synopsis Enzymes in Industry by : Wolfgang Gerhartz
Download or read book Enzymes in Industry written by Wolfgang Gerhartz and published by . This book was released on 1990 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Enzyme nomenclature. Structure of enzymes. Enzymes and molecular biology. Catalytic activity of enzymes. Quality evaluation of enzyme preparations. General production methods: fermentation, isolation and purification, immobilization. Industrial uses of enzymes: survey of industrial enzymes, enzymes in starch processing and baking, glucose isomerization, meat processing, dairy products, processing of fruit, vegetables, and wine, hidrolysis of protein, fat, and cellusose, and inversion of sucrose. Enzymes in organic synthesis. Enzymes in analysius and medicine. Enzymes in genetic engineering. Modifying enzymes.
