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Contribution A Letude De Lhydroxylation Catalytique De Derives Aromatiques Par Oxygene En Phase Homogene
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Book Synopsis CONTRIBUTION A L'ETUDE DE L'HYDROXYLATION CATALYTIQUE DE DERIVES AROMATIQUES PAR OXYGENE EN PHASE HOMOGENE by : UDOM.. JINGJIT
Download or read book CONTRIBUTION A L'ETUDE DE L'HYDROXYLATION CATALYTIQUE DE DERIVES AROMATIQUES PAR OXYGENE EN PHASE HOMOGENE written by UDOM.. JINGJIT and published by . This book was released on 1985 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'HYDROXYLATION EST REALISEE PAR L'OXYGENE, A TEMPERATURE AMBIANTE A L'AIDE DU SYSTEME CATALYTIQUE FE/EDTA ASSOCIE A UN REDUCTEUR, L'ACIDE ASCORBIQUE. POUR SUPPRIMER L'EFFET INHIBITEUR INHERENT A LA PRESENCE D'ACIDE ASCORBIQUE, CELUI-CI A ETE REMPLACE PAR UNE REDUCTION ELECTROCHIMIQUE. MECANISME DE LA REACTION. L'ACTIVITE ET LA SELECTIVITE DU SYSTEME ONT PU ETRE AMELIOREES PAR ADDITION DE DERIVES PERFLUORES (PERFLUORODICATION) ET PAR UTILISATION D'UNE ELECTRODE A LA SURFACE DE LAQUELLE A ETE GREFFE L'ENSEMBLE DU SYSTEME CATALYTIQUE
Book Synopsis Hydroxylation électroassistée de composés aromatiques en phase liquide by : VALERIE.. DOIDY
Download or read book Hydroxylation électroassistée de composés aromatiques en phase liquide written by VALERIE.. DOIDY and published by . This book was released on 1992 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'ACTIVATION DE L'OXYGENE MOLECULAIRE PAR LES METAUX DE TRANSITION EST FONDAMENTALE POUR DE NOMBREUSES OXYDATIONS BIOLOGIQUES DANS LESQUELLES INTERVIENNENT DES SYSTEMES ENZYMATIQUES QUI PEUVENT ETRE MODELISES. CELUI DU CYTOCHROME P-450 EST IMITE PAR UN CATALYSEUR CHIMIQUE A BASE DE FER: LE SYSTEME D'UDENFRIEND (FER FERREUX-EDTA-OXYGENE). CE SYSTEME BIOMIMETIQUE PERMET D'OXYDER SELECTIVEMENT DES COMPOSES AROMATIQUES ET, DANS CETTE ETUDE, LE CATALYSEUR EST REGENERE PAR REDUCTION ELECTROCHIMIQUE. LES OBJECTIFS DE CE TRAVAIL SONT, D'UNE PART, L'AMELIORATION DU SYSTEME ELECTROCHIMIQUE ET, D'AUTRE PART, UNE MEILLEURE COMPREHENSION DES MECANISMES DES REACTIONS D'HYDROXYLATION DES COMPOSES AROMATIQUES EN PHASE LIQUIDE. L'ETUDE ELECTROCHIMIQUE DU CATALYSEUR A MONTRE QU'IL S'OXYDAIT RAPIDEMENT ET QUE SES PROPRIETES ETAIENT MODIFIEES EN FONCTION DE LA NATURE DE L'ELECTRODE. LORS DE L'HYDROXYLATION DU PHENOL, PREMIER SUBSTRAT MODELE CHOISI, ON A MIS EN EVIDENCE QUE LA CATHODE (TRESSE DE CARBONE) AMELIORAIT L'ACTIVITE DU SYSTEME CATALYTIQUE. CEPENDANT, CE TYPE DE CATHODE N'EST PAS STABLE CE QUI NOUS A CONDUIT A UTILISER PLUTOT UNE CATHODE EN MOUSSE DE NICKEL. D'AUTRE PART, LE FAIT QUE LA CATHODE NE SOIT PAS SEPAREE DE L'ANODE ENTRAINE DES REACTIONS SECONDAIRES QUE NOUS AVONS SIGNIFICATIVEMENT DIMINUEES EN UTILISANT UNE CELLULE A COMPARTIMENTS SEPARES. L'HYDROXYLATION DU TOLUENE (SECOND SUBSTRAT MODELE) A ETE ETUDIEE EN UTILISANT COMME SOLVANT UN MELANGE CH#3CN, H#2O, ACOH DE COMPOSITION VARIABLE. ON A MONTRE QUE LA SELECTIVITE (L'HYDROXYLATION DU NOYAU AROMATIQUE PAR RAPPORT A L'OXYDATION DU GROUPEMENT METHYLE) DEPENDAIT DE LA COMPOSITION ET DE LA POLARITE DU SOLVANT AINSI QUE L'ACIDITE DU MILIEU. ENFIN CETTE ETUDE NOUS A PERMIS DE PROPOSER PARMI TOUTES LES ESPECES ACTIVES SUSCEPTIBLES D'ETRE MISES EN JEU (LES ESPECES FEROXO, FERRYL ET FER-DIHYDROXO) UN SCHEMA REACTIONNEL FAISANT INTERVENIR L'ESPECE FERRYL
Book Synopsis HYDROXYLATION AROMATIQUE ET EPOXYDATION D'ALCENES PAR DES DERIVES DU BORE. EPOXYDATION ASYMETRIQUE by : ERIC.. MANOURY
Download or read book HYDROXYLATION AROMATIQUE ET EPOXYDATION D'ALCENES PAR DES DERIVES DU BORE. EPOXYDATION ASYMETRIQUE written by ERIC.. MANOURY and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: CETTE THESE EST CONSACREE A L'ETUDE DES SYSTEMES D'OXYDATION PAR LES COUPLES HYDROPEROXYDE D'ALKYLE/COMPOSES DU BORE DANS LES DOMAINES DE L'HYDROXYLATION DES HYDROCARBURES AROMATIQUES ET DE L'EPOXYDATION DES ALCENES NON-FONCTIONNALISEES. CES SYSTEMES PEUVENT ETRE MIS EN UVRE SOIT EN SYNTHETISANT LE PERBORATE DESIRE PUIS EN UTILISANT CELUI-CI COMME OXYDATION STCHIOMETRIQUE, SOIT EN FORMANT LE PERBORATE IN SITU EN PRESENCE DE SUBSTRAT A OXYDER. DANS LA PREMIERE PARTIE CONSACREE A LA SYNTHESE DE PERBORATES, NOUS AVONS MONTRE QUE SI LES TRIPERBORATES SONT DES ESPECES STABLES ET ISOLABLES, LES MONOPERBORATES TARTRIQUES SE DECOMPOSENT TRES RAPIDEMENT, MEME A TEMPERATURE AMBIANTE. IL EST CEPENDANT POSSIBLE DE LES STABILISER EN PRESENCE D'UNE BASE DE LEWIS MAIS PAS DE FACON SUFFISANTE POUR ETRE CAPABLE DE LES ISOLER ET DE LES PURIFIER. DANS LA DEUXIEME PARTIE, NOUS AVONS UTILISE LES PERBORATES PREPARES IN SITU POUR ETUDIER LA REACTION D'HYDROXYLATION DES HYDROCARBURES AROMATIQUES ET L'EPOXYDATION ASYMETRIQUE DES OLEFINES. L'ETUDE DE LA REACTIVITE DES PERBORATES VIS-A-VIS DE DIVERS NOYAUX AROMATIQUES ET DE L'HYDROXYLATION D'HYDROCARBURES MONODEUTERES NOUS ONT PERMIS D'ECARTER DIVERSES POSSIBILITES MECANISTIQUES ET DE PROPOSER UN MECANISME D'ADDITION-REARRANGEMENT IONIQUE POUR LA REACTION D'HYDROXYLATION. DE PLUS, DIVERS BORATES ET QUELQUES ALUMINATES CHIRAUX ASSOCIES A DES HYDROPEROXYDES D'ALKYLE ONT ETE TESTES DANS LA REACTION D'EPOXYDATION ASYMETRIQUE. LES MEILLEURS RESULTATS ONT ETE OBTENUS AVEC LES BORATES TARTRIQUES (E.E. JUSQU'A 51%), POUR CERTAINES OLEFINES REACTIVES, LE SYSTEME PEUT FONCTIONNER AVEC UNE QUANTITE CATALYTIQUE DE BORE (20 MOL%)
Book Synopsis Advanced Oxidation Processes for Water and Wastewater Treatment by : Simon Parsons
Download or read book Advanced Oxidation Processes for Water and Wastewater Treatment written by Simon Parsons and published by IWA Publishing. This book was released on 2004-03-01 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: The suitability of Advanced Oxidation Processes (AOPs) for pollutant degradation was recognised in the early 1970s and much research and development work has been undertaken to commercialise some of these processes. AOPs have shown great potential in treating pollutants at both low and high concentrations and have found applications as diverse as ground water treatment, municipal wastewater sludge destruction and VOCs control. Advanced Oxidation Processes for Water and Wastewater Treatment is an overview of the advanced oxidation processes currently used or proposed for the remediation of water, wastewater, odours and sludge. The book contains two opening chapters which present introductions to advanced oxidation processes and a background to UV photolysis, seven chapters focusing on individual advanced oxidation processes and, finally, three chapters concentrating on selected applications of advanced oxidation processes. Advanced Oxidation Processes for Water and Wastewater Treatment will be invaluable to readers interested in water and wastewater treatment processes, including professionals and suppliers, as well as students and academics studying in this area. Dr Simon Parsons is a Senior Lecturer in Water Sciences at Cranfield University with ten years' experience of industrial and academic research and development.
Book Synopsis Side Reactions in Organic Synthesis by : Florencio Zaragoza Dörwald
Download or read book Side Reactions in Organic Synthesis written by Florencio Zaragoza Dörwald and published by John Wiley & Sons. This book was released on 2006-03-06 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most syntheses in the chemical research laboratory fail and usually require several attempts before proceeding satisfactorily. Failed syntheses are not only discouraging and frustrating, but also cost a lot of time and money. Many failures may, however, be avoided by understanding the structure-reactivity relationship of organic compounds. This textbook highlights the competing processes and limitations of the most important reactions used in organic synthesis. By allowing chemists to quickly recognize potential problems this book will help to improve their efficiency and success-rate. A must for every graduate student but also for every chemist in industry and academia. Contents: 1 Organic Synthesis: General Remarks 2 Stereoelectronic Effects and Reactivity 3 The Stability of Organic Compounds 4 Aliphatic Nucleophilic Substitutions: Problematic Electrophiles 5 The Alkylation of Carbanions 6 The Alkylation of Heteroatoms 7 The Acylation of Heteroatoms 8 Palladium-Catalyzed C-C Bond Formation 9 Cyclizations 10 Monofunctionalization of Symmetric Difunctional Substrates
Book Synopsis Chemisorption and Reactivity on Supported Clusters and Thin Films: by : R.M. Lambert
Download or read book Chemisorption and Reactivity on Supported Clusters and Thin Films: written by R.M. Lambert and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heterogeneous catalysis provides the backbone of the world's chemical and oil industries. The innate complexity of practical catalytic systems suggests that useful progress should be achievable by investigating key aspects of catalysis by experimental studies on idealised model systems. Thin films and supported clusters are two promising types of model system that can be used for this purpose, since they mimic important aspects of the properties of practical dispersed catalysts. Similarly, appropriate theoretical studies of chemisorption and surface reaction clusters or extended slab systems can provide valuable information on the factors that underlie bonding and catalytic activity. This volume describes such experimental and theoretical approaches to the surface chemistry and catalytic behaviour of metals, metal oxides and metal/metal oxide systems. An introduction to the principles and main themes of heterogeneous catalysis is followed by detailed accounts of the application of modern experimental and theoretical techniques to fundamental problems. The application of advanced experimental methods is complemented by a full description of theoretical procedures, including Hartree-Fock, density functional and similar techniques. The relative merits of the various approaches are considered and directions for future progress are indicated.
Book Synopsis Ageing and Stabilisation of Paper by : M. Strlic (ed.)
Download or read book Ageing and Stabilisation of Paper written by M. Strlic (ed.) and published by . This book was released on 2005 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Chemistry and Significance of Condensed Tannins by : Richard W. Hemingway
Download or read book Chemistry and Significance of Condensed Tannins written by Richard W. Hemingway and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 539 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book was developed from the proceedings of the first North American Tannin Conference held in Port. Angeles, Washington, August 1988. The objective of the conference was to bring together people with a common interest in condensed tannins and to promote interdisciplinary interactions that will lead to a better understanding of these important substances. Anot. her objective was the publicat. ion of this book because there has not been a monograph devoted to the chemistry and significance of tannins for several decades. The book is organized into sections dealing with the biosynthesis, structure, re actions, complexation with other biopolymers, biological significance, and use of tannins as specialty chemicals. The authors made a special attempt to focus on what we don't know as well as to provide a summary of what we do know in an effort to assist in planning future research. Our thanks go to the authors who so kindly contributed chapters and so pa tiently responded to our requests. We also thank Rylee Geboski and the Conference Assist. ance Staff, College of Forestry, Oregon State University, for their assistance in planning and conducting t. he conference, and Julia Wilson, Debbie Wolfe, Helen Coletka, and Nancy Greene of the Southern Forest Experiment Station, Pineville, Louisiana, who typed the chapt. ers. Linda Chalker-Scott was especially helpful in assisting us wit. h editing. Dick Hemingway is indebted t. o the staff of the Alexandria Forest.
Book Synopsis Non-Conventional Yeasts in Genetics, Biochemistry and Biotechnology by : Klaus Wolf
Download or read book Non-Conventional Yeasts in Genetics, Biochemistry and Biotechnology written by Klaus Wolf and published by Springer Science & Business Media. This book was released on 2003-03-04 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most information on yeasts derives from experiments with the conventional yeasts Saccaromyces cerevisiae and Schizossaccharomyces pombe, the complete nuclear and mitochondrial genome of which has also been sequenced. For all other non-conventional yeasts, investigations are in progress and the rapid development of molecular techniques has allowed an insight also into a variety of non-conventional yeasts. In this bench manual, over 70 practical protocols using 15 different non-conventional yeast species and in addition several protocols of general use are described in detail. All of these experiments on the genetics, biochemistry and biotechnology of yeasts have been contributed by renowned laboratories and have been reproduced many times. The reliable protocols are thus ideally suited also for undergraduate and graduate practical courses.
Book Synopsis Active Oxygen in Chemistry by : Christopher S. Foote
Download or read book Active Oxygen in Chemistry written by Christopher S. Foote and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt: Taking an interdisciplinary approach, this book and its counterpart, Active Oxygen in Biochemistry, explore the active research area of the chemistry and biochemistry of oxygen. Complementary but independent, the two volumes integrate subject areas including medicine, biology, chemistry, engineering, and environmental studies.
Book Synopsis Chemistry and Analysis of Volatile Organic Compounds in the Environment by : H.J. Bloemen
Download or read book Chemistry and Analysis of Volatile Organic Compounds in the Environment written by H.J. Bloemen and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interest in the occurrence and behaviour of volatile organic compounds (VOCs) is increasing due to their adverse effects on the environment and human health. It is essential that information is made available on the various aspects of research on VOCs to enable better understanding and control of the various environmental and human health threats. The information in this book will be used to improve communication and understanding of the various approaches. In particular the potential and limitations of the described analytical methods will be essential in defining environmental studies and interpreting the results.
Download or read book Biopolyesters written by Wolfgang Babel and published by Springer. This book was released on 2003-07-01 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: Living systems synthesize seven different classes of polymers. They provide structure and form for cells and organisms, function as catalysts and energy storage and carry the genetic information. All these polymers possess technically interesting properties. Some of these biopolymers are already used commercially. This special volume of Advances in Biochemical Engineering/Biotechnology comprises 10 chapters. It gives an overview of the water insoluble biopolyesters, in particular of the microbially synthesized poly-hydroxyalkanoate (PHA) family. It reports the state of the art of metabolism, regulation and genetic background, the latest advances made in genetic optimization of bacteria, "construction" of transgenic plants and in vitro synthesis by means of purified enzymes. Furthermore, it describes relevant technologies and evaluates perspectives concerning increasing the economic viability and competitiveness of PHA and discusses applications in medicine, packaging, food and other fields.
Book Synopsis Flavours and Fragrances by : Ralf Günter Berger
Download or read book Flavours and Fragrances written by Ralf Günter Berger and published by Springer Science & Business Media. This book was released on 2007-03-06 with total page 649 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an introduction to the world of aroma chemicals, essential oils, fragrances and flavour compositions for the food, cosmetics and pharmaceutical industry. Present technology, the future use of resources and biotechnological approaches for the production of the respective chemical compounds are described. The book has an integrated and interdisciplinary approach on future industrial production and the issues related to this topic.
Book Synopsis Photosensitisation by : Giuliana Moreno
Download or read book Photosensitisation written by Giuliana Moreno and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radiation induces a variety of chemical processes in biological tissues. This volume is a synthesis of up-to-the-minute reviews on such photochemical and photobiological sensitized reactions with particular relevance to photomedicine. The first part gives a description of experimental techniques for the study of the primary processes after radiation absorption by biological systems. It is followed by chapters on singlet oxygen and photomedicine, considering both phototherapy and photochemotherapy. These sections also discuss the next generation of potential photosensitizing drugs.
Book Synopsis Pillared Clays and Related Catalysts by : Antonio Gil
Download or read book Pillared Clays and Related Catalysts written by Antonio Gil and published by Springer Science & Business Media. This book was released on 2010-08-28 with total page 531 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the first works introducing the aluminum intercalated clay family in the early 1970s, interest in the synthesis of pillared interlayered clays has increased tremendously, especially research into the properties and applications of new synthesis methods. The need for solids that could be used as cracking catalysts with larger pores than zeolitic materials has spurred the synthesis of new porous materials from clays. Pillared Clays and Related Catalysts reviews the properties and applications of pillared clays and other layered materials used as catalysts, focusing on: the acidity of pillared clays and the effect it has on catalytic performance the use of pillared clays as supports for catalytically active phases, and the use of the resulting solids in environmentally friendly reactions the applications of the selective reduction of NOx the comparison between the reactions of pillared clays and anionic clays.
Book Synopsis Transition Metal Sulphides by : Th. Weber
Download or read book Transition Metal Sulphides written by Th. Weber and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 357 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrotreating catalysis with transition metal sulphides is one of the most important areas of industrial heterogeneous catalysis. The present book deals with the chemical and catalytic aspects of transition metal sulphides, focusing on their use in hydrotreating catalysis. The book¿s 12 chapters present reviews of solid-state, coordination and organometallic chemistry, surface science and spectroscopic studies, quantum chemical calculations, catalytic studies with model and real catalysts, as well as refinery processes. A presentation of state-of-the-art background to pertinent work in the field. Can be used as an introduction to the chemical and catalytic properties of transition metal sulphides as well as an advanced level reference.
Book Synopsis Biological Adhesives by : Andrew M. Smith
Download or read book Biological Adhesives written by Andrew M. Smith and published by Springer Science & Business Media. This book was released on 2007-01-12 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many creatures use adhesive polymers and structures to attach to inert substrates, to each other, or to other organisms. This is the first major review that brings together research on many of the well-known biological adhesives dealing with bacteria, fungi, algae, and marine and terrestrial animals. As we learn more about their molecular and mechanical properties we begin to understand why they adhere so well and with this comes broad applications in areas such as medicine, dentistry, and biotechnology.
