Download or read book ETUDE EXPERIMENTALE DE LA TRANSITION SOL GEL written by Catherine Amiel and published by . This book was released on 1986 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: COPOLYMERISATION RADICALAIRE ACRYLAMIDE-BIS-ACRYLAMIDE. EVOLUTION DE LA LONGUEUR DE CORRELATION DU GEL PENDANT LA RETICULATION SUIVIE PAR MESURE DE LA PERMEABILITE

Download or read book ETUDE EXPERIMENTALE DE LA TRANSACTION SOL GEL written by BERNARD.. GAUTHIER MANUEL and published by . This book was released on 1986 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: ETUDE DE LA TRANSITION DANS LA ZONE CRITIQUE AFIN DE METTRE EN EVIDENCE EXPERIMENTALEMENT LES ANOMALIES DE COMPORTEMENT MACROSCOPIQUE (DIVERGENCE DE LA VISCOSITE DE L'INVERSE DU MODELED'ELASTICITE, DE LA MASSE MOLECULAIRE MOYENNE, DE LA LONGUEUR DE CORRELATION) PREVUES PAR LES DIVERSES THEORIES

Download or read book ETUDE D UNE TRANSITION SOL GEL PAR MESURES RHEOLOGIQUES ET DE DIFFUSION DE LA LUMIERE written by ABDELHAK.. BAKKALI and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: LE SYSTEME CHIMIQUE MODELE EST FONDE SUR LA RETICULATION ALEATOIRE DE CHAINES LINEAIRES DE POLYSTYRENE PAR DU DICHLOROMETHYLANTHRACENE. IL CONSTITUE UN SUPPORT EXPERIMENTAL POUR CONFRONTER LES THEORIES (LA THEORIE CLASSIQUE ET LA PERCOLATION) QUI DECRIVENT LA TRANSITION SOL-GEL. LES DIFFERENTES ETAPES DE LA GELIFICATION SONT CARACTERISEES PAR DES MESURES RHEOLOGIQUES ET DE DIFFUSION DE LA LUMIERE (STATIQUE ET DYNAMIQUE). LA DISTANCE AU POINT DE GEL EST DETERMINEE PAR SPECTROSCOPIE D'ABSORPTION UV-VISIBLE. L'ETUDE DE LA PHASE SOL REVELE UN COMPORTEMENT REMARQUABLE QUI SE MANIFESTE PAR DES LOIS DE PUISSANCE POUR LES VARIATIONS DE GRANDEURS PHYSICOCHIMIQUES (COMME LA MASSE MOLECULAIRE MOYENNE EN POIDS OU LA VISCOSITE INTRINSEQUE) EN FONCTION E L'AVANCEMENT DE LA REACTION. LES MESURES D'INTENSITE DIFFUSEE ET LES MESURES DE VISCOSITE EN FONCTION DE LA CONCENTRATION MONTRENT QUE LE COMPORTEMENT DES ECHANTILLONS RAMIFIES DIFFERE DE FACON NOTABLE DE CELUI DES LINEAIRES. NOUS AVONS DONC FAIT UNE DISTINCTION ENTRE ENCHEVETREMENT DES CHAINES LINEAIRES ET IMBRICATION DES CHAINES RAMIFIEES. LA PHASE GEL A ETE ETUDIEE A TRAVERS DES MESURES D'ELASTICITE ET DE COEFFICIENT DE DIFFUSION COOPERATIF. LA DISTINCTION ENTRE LES MODULES ELASTIQUES DES GELS BRUTS, DES GELS BRUTS GONFLES ET DES GELS LAVES A LEUR EQUILIBRE DE GONFLEMENT, MET EN EVIDENCE L'IMPORTANCE DE LA CONCENTRATION EN POLYSTYRENE PRECURSEUR DANS LE BAIN DE REACTION. L'ANALOGIE GEL-SOLUTION SEMI DILUEE EN BON SOLVANT EST RESPECTEE LORSQU'IL S'AGIT DE GELS LAVES, SECHES, PUIS REGONFLES A LEUR EQUILIBRE DE GONFLEMENT. CETTE ANALOGIE EST CONFIRMEE AUTANT PAR LES MESURES RHEOLOGIQUES QUE PAR LES MESURES DE DIFFUSION QUASI-ELASTIQUE DE LA LUMIERE

Download or read book CJChE written by and published by . This book was released on 2001-02 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Elaboration par voie sol gel et tude microstructurale de gels et de couches minces de SnO2 written by Wael Hamd and published by . This book was released on 2009 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce travail est consacré à l’élaboration par voie sol-gel de gels et de couches minces de SnO2 à partir d’alkoxydes et de sels d’étain modifiés. L’étude de la gélification a concerné plus particulièrement les gels préparés dans un solvant mixte toluène/isopropanol. Bien que la cinétique de gélification soit considérablement influencée par le taux de complexation et par la concentration en alkoxyde, ces deux paramètres n’ont pas d’effet notable sur la structure finale des gels. Au contraire, cette dernière est remarquablement dépendante du taux de toluène. Nous avons d’autre part étudié les processus de croissance granulaire et de texturation au sein des couches minces réalisées à partir de ces précurseurs. A basse température, la croissance granulaire est régie par un mécanisme de diffusion de surface alors qu’au-delà de 1100 °C c’est le processus d’évaporation-condensation qui prédomine. Parallèlement, à cette croissance granulaire, on observe une texturation progressive des couches.

Download or read book Journal de physique th orique et appliqu e written by and published by . This book was released on 1985 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS)* at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dis semination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volumes were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 39 (thesis year 1994) a total of 13,953 thesis titles from 21 Canadian and 159 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this impor tant annual reference work. While Volume 39 reports theses submitted in 1994, on occasion, certain uni versities do report theses submitted in previous years but not reported at the time.

Download or read book Mat riaux hybrides obtenus par voie sol gel written by Shubhajit Ghosh and published by . This book was released on 2002 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sol Gel Technologies for Glass Producers and Users written by Michel Andre Aegerter and published by Springer Science & Business Media. This book was released on 2013-03-19 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sol-Gel Techniques for Glass Producers and Users provides technological information, descriptions and characterizations of prototypes, or products already on the market, and illustrates advantages and disadvantages of the sol-gel process in comparison to other methods. The first chapter entitled "Wet Chemical Technology" gives a summary of the basic principles of the sol-gel chemistry. The most promising applications are related to coatings. Chapter 2 describes the various "Wet Chemical Coating Technologies" from glass cleaning to many deposition and post-coating treatment techniques. These include patterning of coatings through direct or indirect techniques which have became very important and for which the sol-gel processing is particularly well adapted. Chapter 3 entitled "Bulk Glass Technologies" reports on the preparation of special glasses for different applications. Chapter 4 entitled "Coatings and Materials Properties" describes the properties of the different coatings and the sol-gel materials, fibers and powders. The chapter also includes a section dedicated to the characterization techniques especially applied to sol-gel coatings and products.

Download or read book Expository Science Forms and Functions of Popularisation written by T. Shinn and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: The prevailing view of scientific popularization, both within academic circles and beyond, affirms that its objectives and procedures are unrelated to tasks of cognitive development and that its pertinence is by and large restricted to the lay public. Consistent with this view, popularization is frequently portrayed as a logical and hence inescapable consequence of a culture dominated by science-based products and procedures and by a scientistic ideology. On another level, it is depicted as a quasi-political device for chan nelling the energies of the general public along predetermined paths; examples of this are the nineteenth-century Industrial Revolution and the U. S. -Soviet space race. Alternatively, scientific popularization is described as a carefully contrived plan which enables scientists or their spokesmen to allege that scientific learn ing is equitably shared by scientists and non-scientists alike. This manoeuvre is intended to weaken the claims of anti-scientific protesters that scientists monopolize knowledge as a means of sustaining their social privileges. Pop ularization is also sometimes presented as a psychological crutch. This, in an era of increasing scientific specialisation, permits the researchers involved to believe that by transcending the boundaries of their narrow fields, their endeavours assume a degree of general cognitive importance and even extra scientific relevance. Regardless of the particular thrust of these different analyses it is important to point out that all are predicated on the tacit presupposition that scientific popularization belongs essentially to the realm of non-science, or only concerns the periphery of scientific activity.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Food Hydrocolloids written by K. Nishinari and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 509 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is now well recognised that the texture of foods is an important factor when consumers select particular foods. Food hydrocolloids have been widely used for controlling in various food products their viscoelasticity, emulsification, gelation, dispersion, thickening and many other functions. An international journal, FOOD HYDROCOLLOIDS, launched in 1986 has published a number of stimulating papers, and established an active forum for promoting the interaction between academics and industrialists and for combining basic scientific research with industrial development. Although there have been various research groups in many food processing areas in Japan, such as fish paste (kamaboko, surimi), soybean curd (tofu), agar jelly dessert, kuzu starch jelly, kimizu (Japanese style mayonnaise), their activities have been conducted in isolation of one another. The interaction between the various research groups operating in the various sectors has been weak. Symposia on food hydrocolloids have been organised on several occasions in Japan since 1985. Professor Glyn O. Phillips, the Chief Executive Editor of FOOD HYDROCOLLOIDS, suggested to us that we should organise an international conference on food hydrocolloids. We discussed it on many occasions, and eventually decided to organise such a meeting, and extended the scope to include recent development in proteinaceous hydrocolloids, and their nutritional aspects, in addition to polysaccharides and emulsions.

Download or read book Sol Gel Materials written by John D. Wright and published by CRC Press. This book was released on 2018-10-03 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sol-Gel processing methods, first used historically for decorative and constructional materials, were extensively developed in the last century for applications such as glasses, ceramics, catalysts, coatings, composites and fibres. Today they are reaching their full potential, enabling the preparation of new generations of advanced materials not easily accessible by other methods yet using mild, low-energy conditions. The topic is therefore increasingly included in advanced undergraduate, MSc and PhD programmes in the areas of chemistry, physics and materials science. This concise introductory text, written at the advanced undergraduate/first-year postgraduate level, is also suitable as an introduction to the development, mechanisms, chemistry, characterisation methods and applications of the technique. It provides readers with an extensive yet concise grounding in the theory of each area of the subject and details the real and potential applications and the future prospects of sol-gel chemistry.

Download or read book Caract risation de la transition sol gel en milieu micellaire inverse par incorporation de sondes locales luminescentes written by Jean-Charles Achddou and published by . This book was released on 1991 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2007 with total page 924 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1996 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bulletin de L Institut International Du Froid written by and published by . This book was released on 2008 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt: