Author: FABRICE.. DUMONT
Publisher:
ISBN:
Category :
Languages : fr
Pages : 132
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Book Description
LES POLYBENZYLES ET LES POLYIMIDES SONT CONNUS POUR LEUR BONNE RESISTANCE AUX TEMPERATURES ELEVEES MAIS EGALEMENT POUR LEUR INSOLUBILITE DANS LES SOLVANTS ORGANIQUES USUELS. NOUS AVONS SYNTHETISE PAR POLYCONDENSATION DIFFERENTS POLYBENZYLS ET POLYIMIDES A CHAINES LINEAIRES SUR LESQUELLES NOUS AVONS GREFFE DES GROUPEMENTS ALKYLES OU ALCOXY NON RAMIFIES ET DE DIFFERENTES LONGUEURS. NOUS AVONS AINSI OBTENU DES POLYMERES SOLUBLES DANS LA PLUPART DES SOLVANTS ORGANIQUES TESTES. NOUS AVONS CARACTERISE CES POLYMERES PAR RESONANCE MAGNETIQUE NUCLEAIRE DU PROTON ET DU CARBONE (RMN 1H ET 1 3C), PAR SPECTROSCOPIE INFRAROUGE (IR), PAR CHROMATOGRAPHIE D'EXCLUSION STERIQUE (CES), PAR CALORIMETRIE DIFFERENTIELLE A BALAYAGE A MODULATION DE TEMPERATURE (MT-DSC) ET PAR ANALYSE THERMOGRAVIMETRIQUE (ATG). NOUS AVONS ETUDIE L'INFLUENCE DE LA NATURE DE LA CHAINE AINSI QUE DE LA LONGUEUR DE CELLE-CI SUR LA SOLUBILITE ET LA TEMPERATURE DE TRANSITION VITREUSE (TG). LA NATURE DE LA CHAINE PENDANTE JOUE ESSENTIELLEMENT UN ROLE SUR LA SOLUBILITE ALORS QUE SA LONGUEUR JOUE UN ROLE AUSSI BIEN SUR LA SOLUBILITE QUE LA TEMPERATURE DE TRANSITION VITREUSE. PLUS LA CHAINE PENDANTE EST LONGUE, PLUS LE POLYMERE EST SOLUBLE ET PLUS LA TEMPERATURE DE TRANSITION VITREUSE EST FAIBLE.
Author: Thi Le Anh Nguyen
Publisher:
ISBN:
Category :
Languages : fr
Pages : 386
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Book Description
Cette thèse porte sur la synthèse et les caractérisations structurales et physico-chimiques de nouveaux polymères de coordination cristallins (encore appelés MOFs), poreux ou non, qui possèdent des propriétés redox. Deux approches ont été mis en oeuvre pour préparer de tels matériaux, soit en utilisant un ligand actif (l’acide TétraThiaFulvalène TétraCarboxylique, (TTF-TC)H4) soit un cation métallique actif (le titane). La synthèse hydro- ou solvo-thermale classique a permis de produire des solides dans lesquels le centre redox présente son degré d’oxydation habituel (TTF0,TiIV). Leurs caractéristiques structurales, ainsi que leurs propriétés de stabilité thermique et de porosité ont été étudiées. Leur propriétés redox ont quant à elles été mises à profit par des réactions post-synthèse (photo-réduction, utilisation comme électrode de batterie au lithium). Enfin, le couplage électrocristallisation / synthèse hydrothermale a permis de produire un solide dans lequel le ligand TTF-TC se trouve à l’état oxydé +1. Les propriétés de ce solide, notamment celles de conduction électronique ont été évaluées.
Author: Osvaldo Jaeggli
Publisher: ISSN
ISBN: 9783112420218
Category : Language Arts & Disciplines
Languages : en
Pages : 0
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Book Description
The architecture of the human language faculty has been one of the main foci of the linguistic research of the last half century. This branch of linguistics, broadly known as Generative Grammar, is concerned with the formulation of explanatory formal accounts of linguistic phenomena with the ulterior goal of gaining insight into the properties of the 'language organ'. The series comprises high quality monographs and collected volumes that address such issues. The topics in this series range from phonology to semantics, from syntax to information structure, from mathematical linguistics to studies of the lexicon. To discuss your book idea or submit a proposal, please contact Birgit Sievert
Author: Jin Huang
Publisher: John Wiley & Sons
ISBN: 3527342699
Category : Technology & Engineering
Languages : en
Pages : 514
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Book Description
Comprehensively introduces readers to the production, modifications, and applications of nanocellulose This book gives a thorough introduction to the structure, properties, surface modification, theory, mechanism of composites, and functional materials derived from nanocellulose. It also provides in-depth descriptions of plastics, composites, and functional nanomaterials specifically derived from cellulose nanocrystals, cellulose nanofibrils, and bacterial cellulose. It includes the most recent progress in developing a conceptual framework of nanocellulose, as well as its numerous applications in the design and manufacture of nanocomposites and functional nanomaterials. The book also looks at the relationship between structure and properties. Featuring contributions from many noted experts in the field, Nanocellulose: From Fundamentals to Advanced Materials examines the current status of nanocomposites based on nanocelluloses. It covers surface modification of nanocellulose in the nanocomposites development; reinforcing mechanism of cellulose nanocrystals in nanocomposites; and advanced materials based on self-organization of cellulose nanocrystals. The book studies the role of cellulose nanofibrils in nanocomposites, as well as a potential application based on colloidal properties of cellulose nanocrystals. It also offers strategies to explore biomedical applications of nanocellulose. Provides comprehensive knowledge on the topic of nanocellulose, including the preparation, structure, properties, surface modification and strategy Covers new reports on the application of nanocellulose Summarizes three kinds of nanocellulose (cellulose nanocrystals, cellulose nanofibrils, and bacterial cellulose) and their production, modification, and applications Nanocellulose: From Fundamentals to Advanced Materials is a useful resource for specialist researchers of chemistry, materials, and nanotechnology science, as well as for researchers and students of the subject.
Author: Trevor Letcher
Publisher: Academic Press
ISBN: 0128141050
Category : Business & Economics
Languages : en
Pages : 822
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Book Description
Managing Global Warming: An Interface of Technology and Human Issues discusses the causes of global warming, the options available to solve global warming problems, and how each option can be realistically implemented. It is the first book based on scientific content that presents an overall reference on both global warming and its solutions in one volume. Containing authoritative chapters written by scientists and engineers working in the field, each chapter includes the very latest research and references on the potential impact of wind, solar, hydro, geo-engineering and other energy technologies on climate change. With this wide ranging set of topics and solutions, engineers, professors, leaders and policymakers will find this to be a valuable handbook for their research and work. Presents chapters that are accompanied by an easy reference summary Includes up-to-date options and technical solutions for global warming through color imagery Provides up-to-date information as presented by a collection of renowned global experts
Author: Moghis U. Ahmad
Publisher: Elsevier
ISBN: 012809544X
Category : Science
Languages : en
Pages : 617
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Book Description
Fatty Acids: Chemistry, Synthesis and Applications is a comprehensive source of information about a wide range of industrially important fatty acids. This practical resource provides key insights into the chemistry, synthesis, industrial applications, derivatives, and analysis of fatty acids, and the chemical modifications that transform them for use in products from biodiesel fuels to pharmaceuticals. Written by a team of industry experts, Fatty Acids includes detailed descriptions of fatty acid crystallization, enzymatic synthesis, and microbial production. This book focuses heavily on the chemistry of trans fatty acids, with extensive explanations of their synthesis and measurement. Further, the book addresses advances in the analytical methodology, including mass spectrometry, of fatty acids as well as their derivatives. This book serves as a reference manual to a new generation of lipid scientists and researchers; a useful resource for oleochemical industries; and a valuable teaching aid for undergraduate and graduate students who are interested in fields related to the chemistry of oils, fats, and food. - Includes recent developments in the synthesis of fatty acid derivatives, as renewable raw materials for the chemical industry - Presents efficient synthetic methods for the dietary trans fatty acids in multi-gram scale allowing scientists and researchers to study dietary effects of individual trans fatty acids on human health - Addresses uses of fats and fatty acids in foods and nutrition - Identifies the roles of fatty acids and derivatives in cosmetic technology
Author: Food and Agriculture Organization of the United Nations
Publisher: Food & Agriculture Org.
ISBN: 9789251045411
Category : Business & Economics
Languages : en
Pages : 20
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Book Description
The actual Code of conduct is also available (1996) (ISBN 9251038341).
Author: Konstantinos N. Papadopoulos
Publisher: Nova Publishers
ISBN: 9781604562620
Category : Science
Languages : en
Pages : 320
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Book Description
Food chemistry is the study of chemical processes and interactions of all biological and non-biological components of foods. The biological substances include such items as meat, poultry, lettuce, beer, and milk as examples. It is similar to biochemistry in its main components such as carbohydrates, lipids, and protein, but it also includes areas such as water, vitamins, minerals, enzymes, food additives, flavours, and colours. This discipline also encompasses how products change under certain food processing techniques and ways either to enhance or to prevent them from happening. An example of enhancing a process would be to encourage fermentation of dairy products with lactic acid; an example of a preventing process would be stopping the Maillard reaction on the surface of freshly cut Red Delicious apples whether by hand or mechanical methods. This book presents the recent research from around the world in this field.
Author: Antonio Pizzi
Publisher: CRC Press
ISBN: 9780203912225
Category : Science
Languages : en
Pages : 1060
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Book Description
The Handbook of Adhesive Technology, Second Edition exceeds the ambition of its bestselling forerunner by reexamining the mechanisms driving adhesion, categories of adhesives, techniques for bond formation and evaluation, and major industrial applications. Integrating modern technological innovations into adhesive preparation and application, this greatly expanded and updated edition comprises a total of 26 different adhesive groupings, including three new classes. The second edition features ten new chapters, a 40-page list of resources on adhesives, and abundant figures, tables, equations.
Author:
Publisher: Elsevier
ISBN: 012408107X
Category : Science
Languages : en
Pages : 593
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Book Description
Advances in Botanical Research publishes in-depth and up-to-date reviews on a wide range of topics in plant sciences. The series features several reviews by recognized experts on all aspects of plant genetics, biochemistry, cell biology, molecular biology, physiology and ecology. This thematic volume, number 71, features reviews on sea plants. Its chapters cover topics such as the role of algae in sustainability; the status of kelp exploitation and marine agronomy; potential applications for enzymatic recovery of metabolites from seaweeds; and many more. - Publishes in-depth and up-to-date reviews on a wide range of topics in plant sciences - Features a wide range of reviews by recognized experts on all aspects of plant genetics, biochemistry, cell biology, molecular biology, physiology, and ecology - Volume features reviews on sea plants
