Conjugated polymers suoh as polyaoetylene (CH)x polyphenylene (C6H4)x' poly thiophene (C4H2S)x' etc., which are insulators in their pristine state, can be brought to the metallic state after "doping" with ohemioal speoies whioh oan be either eleotron donors or I aoceptors. . This doping prooess involves a oharge transfer between the dopant moleoule and the polymer ohain whioh are then supposed to be spatially olose to each other. It follows that the meohanism of doping must be oonsidered as an aotual interoalation process, which will greatly affeot the struotural oharacteristios of the starting material, as well as its morphology, as has been observed during the 2 intercalation of graphite and layered compounds . In parallel with these modifioations, the band struoture of the system changes yielding a new set of eleotronio properties. It is evident therefore that the struotural and eleotronio properties are intimately related, and must be studied simultaneously in the same system to give reliable information. A great number of studies have been devoted to the structural and electronic properties of conjugated polymers after a chemical or 2 electrochemical doping process . Most of these concern the properties of the system for a given dopant concentration. With this approach a universal pioture of the polymer/dopant system is very diffioult to obtain, as a comparison between different experiments is very hazardous. On the other hand, only a small number of measurements have been performed during the continuous electroohemioal doping of various polymers.
Many recent studies of French politics have tended to concentrate on the French political system in isolation. Contemporary France aims to set the working of the French political system into its historical, social and economic context. The first section gives a succinct description of the main developments since 1944 in all major contexts - economy, society, domestic politics and foreign relations. The authors then analyse the economic, social and cultural structures of present-day France, and discuss the institutional framework of decision-making and the major political forces involved in it. There are also chapters on French external and defence policy and on the education system, all of which are set in the context of the political system as a whole. Aimed primarily at students of European history and politics or of French society and culture, the book assumes little knowledge in the social sciences and will be readily accessible to beginners in this field.
Byzantium, that dark sphere on the periphery of medieval Europe, is commonly regarded as the immutable residue of Rome's decline. In this highly original and provocative work, Alexander Kazhdan and Ann Wharton Epstein revise this traditional image by documenting the dynamic social changes that occurred during the eleventh and twelfth centuries.
Manual of Local Anaesthesia in Dentistry is the third edition of this highly illustrated guide, which provides an overview of anatomy, neurophysiology and anaesthetic techniques in dentistry. Divided into seven sections, this book begins with a history of anaesthesia, followed by applied anatomy of maxilla and mandible, neurophysiology and pharmacology. Subsequent sections cover indications and contraindications of local anaesthesia, equipment, techniques of local anaesthesia including new injection techniques, complications and their management. The final section is brand new to this edition and features guidelines for managing exposure to blood borne pathogens, and a chapter featuring questions and answers on anaesthesia topics. Other new chapters in this edition include Ergonomics in Dental Practice, Local Anaesthesia in Children, and Medical Emergencies in Dental Office. Manual of Local Anaesthesia in Dentistry is enhanced by over 270 full colour images and illustrations, making this an ideal visual guide for undergraduates and practising dental professionals. Key Points Third edition of this highly illustrated manual Previous edition published 2009 (9788184487015) Three new chapters and one brand new section: Guidelines for Managing Occupational Exposures to Blood Borne Pathogens 272 full colour illustrations and images
Conjugated polymers suoh as polyaoetylene (CH)x polyphenylene (C6H4)x' poly thiophene (C4H2S)x' etc., which are insulators in their pristine state, can be brought to the metallic state after "doping" with ohemioal speoies whioh oan be either eleotron donors or I aoceptors. . This doping prooess involves a oharge transfer between the dopant moleoule and the polymer ohain whioh are then supposed to be spatially olose to each other. It follows that the meohanism of doping must be oonsidered as an aotual interoalation process, which will greatly affeot the struotural oharacteristios of the starting material, as well as its morphology, as has been observed during the 2 intercalation of graphite and layered compounds . In parallel with these modifioations, the band struoture of the system changes yielding a new set of eleotronio properties. It is evident therefore that the struotural and eleotronio properties are intimately related, and must be studied simultaneously in the same system to give reliable information. A great number of studies have been devoted to the structural and electronic properties of conjugated polymers after a chemical or 2 electrochemical doping process . Most of these concern the properties of the system for a given dopant concentration. With this approach a universal pioture of the polymer/dopant system is very diffioult to obtain, as a comparison between different experiments is very hazardous. On the other hand, only a small number of measurements have been performed during the continuous electroohemioal doping of various polymers.
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