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Nouvelles Phases Stationnaires A Base De Cyclodextrine
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Book Synopsis Nouvelles phases stationnaires à base de cyclodextrine by : Grégorio Crini
Download or read book Nouvelles phases stationnaires à base de cyclodextrine written by Grégorio Crini and published by . This book was released on 1995 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les supports chromatographiques d'enrobage « coating supports » ont connu ces dernières années un essor considérable. Dans le but d'apporter notre contribution au développement de ce type de supports, nous avons préparé une famille de supports à base de silice passivée avec une phase stationnaire de type polymère greffée par la bêta-cyclodextrine. Les cyclodextrines appartiennent à la famille des molécules dites cages car elles comportent au sein de leur structure une cavité indéformable et hydrophobe qui leur permet d'emprisonner ou d'encapsuler d'autres molécules. Notre choix s'est porté sur les poly(alkylamines) comme polymères. Ces polymères sont des polybases de structure relativement simple, qui présentent de fortes interactions avec les gels de silice. Nous avons utilisé la poly(éthylèneimine), la poly(allylamine) et la poly(vinylamine). Ce dernier polymère n'étant pas commercial, a été synthétisé. Ces polymères ont été fonctionnalisés par la bêta-cyclodextrine. Ces polymères greffés ont alors servi de matériaux de base dans la préparation de nouveaux supports pour la chromatographie liquide haute performance. Les phases stationnaires préparées nous ont permis de séparer des dérivés disubstitués du benzène (nitrophénol, acide nitrobenzoïque, crésol) et d'autres molécules telles que la caféine, la théophylline, l'indométhacine le mécanisme de rétention est basé non seulement sur la formation de complexe d'inclusion, mais aussi sur des interactions de type acide-base et des interactions stériques. Nous avons tenté d'établir une corrélation entre les caractéristiques physique et chimique de nos supports et leur comportement chromatographique. La quantité et la nature du polymère déposé, la teneur en cyclodextrine, ainsi que certains paramètres chromatographiques (la nature et la proportion de la phase éluante, longueur de la colonne...) ont été étudiés.
Book Synopsis The History of Cyclodextrins by : Grégorio Crini
Download or read book The History of Cyclodextrins written by Grégorio Crini and published by Springer Nature. This book was released on 2020-09-29 with total page 409 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the historical development of Cyclodextrins by scientists who have made outstanding contribution to the field. Cyclodextrins are safe, cage-like molecules that have found major applications in many industrial sectors such as medicine, food, agriculture, environment and chemistry.
Book Synopsis Synthèse de nouvelles phases stationnaires mixtes [beta]-cyclodextrines-acide aminé. Etude de leurs propriétés énantiosélectives en chromatographie en phase gazeuse by : Olivier Stephany
Download or read book Synthèse de nouvelles phases stationnaires mixtes [beta]-cyclodextrines-acide aminé. Etude de leurs propriétés énantiosélectives en chromatographie en phase gazeuse written by Olivier Stephany and published by . This book was released on 2009 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthèse de mono et dihydroxy cyclodextrines per-O-méthylées et de leurs dérivés. Etude en chromatographie en phase gazeuse énantiosélective by : Thomas Chaise
Download or read book Synthèse de mono et dihydroxy cyclodextrines per-O-méthylées et de leurs dérivés. Etude en chromatographie en phase gazeuse énantiosélective written by Thomas Chaise and published by . This book was released on 2004 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce travail se situe dans un axe de recherche du laboratoire qui consiste en la synthèse de nouveaux sélecteurs chiraux à base de dérivés de cyclodextrines pour la chromatographie en phase gazeuse énantiosélective. Les synthèses organiques décrites dans ce manuscrit permettent d’obtenir des dérivés de cyclodextrine possédant une ou deux unités glucosidiques différentes des autres. Ces composés sont préparés selon deux stratégies distinctes : la voie directe par dé-O-méthylation de l’α-cyclodextrine perméthylée pour obtenir des composés mono et di hydroxylés, ou après dérivatisation, des composés acétylés et trifluoroacétylés ; et la voie indirecte, par homologation de l’α-cyclodextrine perméthylée (ouverture du cycle de la cyclodextrine, insertion d’une ou deux unités glucosidiques différentes et macrocyclisation). Ces nouvelles molécules, ainsi synthétisées, sont caractérisées par résonance magnétique nucléaire et chromatographie liquide haute performance couplée à un spectromètre de masse. La dernière partie de ce travail présente l’application de ces molécules, diluées dans un polysiloxane (OV-1701-OH), comme nouvelles phases stationnaires chirales pour la chromatographie en phase gazeuse énantiosélective. L’analyse de ces sélecteurs chiraux déposés dans des capillaires de silice fondue nous a permis d’évaluer leur énantiosélectivité vis à vis de solutés chiraux en étudiant les phénomènes d’inclusion. Cette étude préliminaire, par injections de séries homologues de dérivés de l’hydantoïne, du 1-phényléthanol, de γ-lactones et des solutés de structures variées, nous a permis d’apporter une première évaluation des mécanismes de reconnaissance chirale. Les résultats chromatographiques ont permis de mettre en évidence qu’une des phases, la 3-monotrifluoroacétyl-α-cyclodextrine perméthylée, présente une énantiosélectivité significativement différente de l’α-cyclodextrine perméthylée prise comme phase de référence.
Book Synopsis Synthèse et étude de nouvelles phases stationnaires à base de cristaux liquides by : Isabelle Terrien
Download or read book Synthèse et étude de nouvelles phases stationnaires à base de cristaux liquides written by Isabelle Terrien and published by . This book was released on 1998 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE TRAVAIL A CONSISTE EN LA PREPARATION ET L'ETUDE DE NOUVELLES PHASES STATIONNAIRES A BASE DE CRISTAUX LIQUIDES EN VUE D'APPLICATIONS EN CHROMATOGRAPHIE LIQUIDE. DES VARIANTES AU NIVEAU DE LA FORMULATION NOUS ONT PERMIS DE CONVERGER VERS UN TYPE DE PHASES STATIONNAIRES PREPAREES PAR IMPREGNATION DE POLYMERES MESOMORPHES A CHAINES LATERALES DE TYPE HALTERE, FORTEMENT SELECTIVES EN TERMES DE RECONNAISSANCE DE FORME. UNE MODELISATION MOLECULAIRE A PERMIS D'APPREHENDER LES MECANISMES DE DISCRIMINATIONS DE CES PHASES STATIONNAIRES. DE PLUS, POUR LA PREMIERE FOIS, UN PROTOCOLE DE GREFFAGE DE LA COUCHE DE POLYMERE MESOMORPHE SUR LA SILICE EST PROPOSE. LES NOUVELLES PHASES STATIONNAIRES RESULTANTES ONT ETE APPLIQUEES POUR SEPARER LES CONSTITUANTS DE MELANGES COMPLEXES SANS RESTRICTION DANS LE CHOIX DE LA PHASE MOBILE.
Download or read book Analusis written by and published by . This book was released on 1993 with total page 1098 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cyclodextrin Applications in Medicine, Food, Environment and Liquid Crystals by : Sophie Fourmentin
Download or read book Cyclodextrin Applications in Medicine, Food, Environment and Liquid Crystals written by Sophie Fourmentin and published by Springer. This book was released on 2018-06-22 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the second volume of two volumes on cyclodextrins published in the series Environmental Chemistry for a Sustainable World. This volume focuses on cyclodextrin applications. The first chapter by Divya Arora and Sundeep Jaglan presents cyclodextrin-based carriers for delivery of dietary phytochemicals. The second chapter by Éva Fenyvesi et al. describes the interactions of steroids with cyclodextrins and their applications to pharmaceuticals, food, biotechnology and environment. Nazli Erdoğar and Erem Bilensoy discuss cyclodextrin-based nanosystems in targeted cancer therapy. Miriana Kfoury et al. review the use of cyclodextrins for essential oils applications in chapter 4. Hiroshi Ikeda demonstrates in chapter 5 that chromophore-appended cyclodextrins are effective for chemosensors to detect organic molecules by fluorescence or absorbance changes. Then Grégorio Crini et al. describe silica materials-containing cyclodextrin for pollutant removal. The final chapter by Chang-Chun Ling et al. summarizes the synthesis and characterization of supramolecular liquid crystals based on cyclodextrins and their applications.
Book Synopsis Sorption Processes and Pollution by : Grégorio Crini
Download or read book Sorption Processes and Pollution written by Grégorio Crini and published by Presses Univ. Franche-Comté. This book was released on 2010 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cyclodextrin Fundamentals, Reactivity and Analysis by : Sophie Fourmentin
Download or read book Cyclodextrin Fundamentals, Reactivity and Analysis written by Sophie Fourmentin and published by Springer. This book was released on 2018-04-26 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the first volume of two volumes on cyclodextrins published in the series Environmental Chemistry for a Sustainable World. After a brief description of the cyclodextrin fundamentals, the first chapter by Grégorio Crini et al. provides an overview of cyclodextrin research during the last 5 years. The second chapter by Michal Řezanka discusses the synthesis of novel cyclodextrin systems by selective modifications. Then Eric Monflier et al. describes the synthesis of nanostructured porous materials based on cyclodextrins, and applications in heterogeneous catalysis and photocatalysis. The use of thermal analyses for assessing cyclodextrin inclusion complexes is reviewed in chapter 4 by Daniel Hădărugă et al. Experimental methods for measuring binding constants of cyclodextrin inclusion compounds are presented by David Landy. The second volume reviews cyclodextrin applications in medicine, food, environment and liquid crystals.
Book Synopsis Masters Theses in the Pure and Applied Sciences by : Wade H. Shafer
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer. This book was released on 1976 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and dis· seminated 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 dissemination phases of the ac· tivity 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 volume 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 20 (thesis year 1975) a total of 10,374 theses titles from 28 Canadian and 239 United States universities. We are sure that this broader base for theses titles reported will greatly enhance the value of this important annual reference work. The organization of Volume 20 is identical to that of past years. It consists of theses titles arranged by discipline and by university within each discipline.
Book Synopsis Cyclodextrin Technology by : J. Szejtli
Download or read book Cyclodextrin Technology written by J. Szejtli and published by Springer Science & Business Media. This book was released on 1988-08-31 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Phytochemicals in Nutrition and Health by : Mark S. Meskin
Download or read book Phytochemicals in Nutrition and Health written by Mark S. Meskin and published by CRC Press. This book was released on 2002-03-19 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt: Are soy isoflavones neuroprotective? Just how different is one species of Echinacea from another? Which phytochemicals will be effective as therapeutic agents in vivo? Supported by solid scientific research, Phytochemicals in Nutrition and Health helps provide answers to these and other probing questions concerning the mechanisms of action associat
Book Synopsis Green Chemistry for Dyes Removal from Waste Water by : Sanjay K. Sharma
Download or read book Green Chemistry for Dyes Removal from Waste Water written by Sanjay K. Sharma and published by John Wiley & Sons. This book was released on 2015-02-25 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of synthetic chemical dyes in various industrial processes, including paper and pulp manufacturing, plastics, dyeing of cloth, leather treatment and printing, has increased considerably over the last few years, resulting in the release of dye-containing industrial effluents into the soil and aquatic ecosystems. The textile industry generates high-polluting wastewaters and their treatment is a very serious problem due to high total dissolved solids (TDS), presence of toxic heavy metals, and the non-biodegradable nature of the dyestuffs in the effluent. The chapters in this book provide an overview of the problem and its solution from different angles. These problems and solutions are presented in a genuinely holistic way by world-renowned researchers. Discussed are various promising techniques to remove dyes, including the use of nanotechnology, ultrasound, microwave, catalysts, biosorption, enzymatic treatments, advanced oxidation processes, etc., all of which are "green." Green Chemistry for Dyes Removal from Wastewater comprehensively discusses: Different types of dyes, their working and methodologies and various physical, chemical and biological treatment methods employed Application of advanced oxidation processes (AOPs) in dye removal whereby highly reactive hydroxyl radicals are generated chemically, photochemically and/or by radiolytic/ sonolytic means. The potential of ultrasound as an AOP is discussed as well. Nanotechnology in the treatment of dye removal types of adsorbents for removal of toxic pollutants from aquatic systems Photocatalytic oxidation process for dye degradation under both UV and visible light, application of solar light and solar photoreactor in dye degradation
Book Synopsis Unsteady Transonic Flow by : Mårten T. Landahl
Download or read book Unsteady Transonic Flow written by Mårten T. Landahl and published by Courier Dover Publications. This book was released on 2019-04-17 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: This classic monograph on unsteady transonic flow — the flow of air encountered at speeds at or near the speed of sound — is of continuing interest to students and professionals in aerodynamics, fluid dynamics, and other areas of applied mathematics. After a brief Introduction, Swedish physicist Mårten T. Landahl presents a chapter in which the two-dimensional solution is derived, succeeded by a discussion of its relation to the subsonic and supersonic solutions. Three chapters on low aspect ratio configurations follow, covering triangular wings and similar planforms with curved leading edges, rectangular wings, and cropped delta wings, and low aspect ratio wing-body combinations. The treatment concludes with a consideration of the experimental determination of air forces on oscillating wings at transonic speeds.
Download or read book Cellulose written by Matheus Poletto and published by BoD – Books on Demand. This book was released on 2015-12-09 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Advances in Liquid Chromatography by : Toshihiko Hanai
Download or read book Advances in Liquid Chromatography written by Toshihiko Hanai and published by World Scientific. This book was released on 1996 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a contemporary review of selected subjects in liquid chromatography, especially of the technical development, rather than the applications. The subjects are focused in the biomedical and environmental fields. This is also a troubleshooting record. Complex analytical problems such as sensitivity (sensitive detection by chemiluminescence, coulometric detection, laser based detection, necessity of degassing the system for sensitive detection), difficulty (free radical detection by Electron Spin Resonance, Polarimeter for chiral recognition) and reproducibility (packings for chiral separation and stable bonded silica gels) are solved. Theoretically and environmentally important miniaturizations are described. Individual chapters written by specialists provide information beyond what can be found in general textbooks of liquid chromatography.
Book Synopsis The U.S. Sheep Industry by : Richard P. Stillman
Download or read book The U.S. Sheep Industry written by Richard P. Stillman and published by . This book was released on 1990 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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