This volume examines an important aspect of the search for effective anti-tumour agents -- the superoxide dismutase models. The authors consider the complex compounds of transition metals which imitate the catalytic properties of superoxide dismutases from the point of view of their pharmacological applicability.
The interest in polymer composites research is due to their enlarged application. Filling with hard particles gives to polymers a number of desirable properties: increases hardness, decreases heat expansion coefficient, improves resistance to creep and fracture toughness. Difficulties in structure-properties relationships researching for polymer composites are due to their structure complexity. Till now, composites studies were conducted within the frameworks of continuum mechanics and thermodynamic conceptions. However, these conceptions applications does not allow satisfactory descriptions nor predictions of such materials properties. As a matter of fact, an experimental data set dictates one or another physical model of structure choice for composites macroscopic properties description.
Since the early investigations by Berthelot (1862) and N.A. Menshutkin (1887) the solvent effects on the chemical reaction rate is an object of regard for chemists. Primarily, solvents were considered as reaction media, and attempts were made to explain solvent effects by pure physical interactions. In recent decades, specific (chemical) interactions between solutes and the medium became of greater attention. Further on, the necessity of combined consideration of all solvation interactions in the solution was highly apprehended. Hence, a solvent may not only solvate the initial reagents and the initial state, but also take active part in its formation. Such consideration may be performed using linear free energy relationships (LFER). Numerical accuracy of the description will depend on adequacy of a formal solvation model which forms the basis of corresponded linear free energy (LFE) equation. At present, Koppel-Palm and Kamlet-Taft models are the most widespread. Corresponded reviews of various models are discussed. However, it should be remembered that these approaches are not the final dogma and are permanently changed and modified.
If you want to provide an information service that truly fulfils your users' needs, this book is essential reading. Analysing and assessing the information needs of clients is key to the provision of effective service and appropriate collections in both face-to-face and virtual library services. The importance of information needs analysis is widely recognized by information professionals, but currently there is little substantive, detailed work in the professional literature devoted to this important topic. This new book is designed to fill that gap, by supporting practitioners in developing an information needs analysis strategy, and offering the necessary professional skills and techniques to do so. It will offer guidance to team leaders and senior managers in all areas of library work, especially those involved in collection management, service provision and web development, and is equally applicable to the needs of academic, public, government, commercial and other more specialized library and information services. The text adopts a hands-on, jargon-free approach, and includes relevant examples, case studies, reader activities and sources of further reading. Key areas covered include:what is information needs analysis?how is needs analysis conducted?what are the varieties of needs analysis?how are analyses evaluated and reported? Readership: The book will be essential reading for library and information practitioners, team leaders and senior managers. It will also be a core text on course reading lists in departments of library and information studies.
If you want to provide an information service that truly fulfils your users' needs, this book is essential reading. Analysing and assessing the information needs of clients is key to the provision of effective service and appropriate collections in both face-to-face and virtual library services. The importance of information needs analysis is widely recognized by information professionals, but currently there is little substantive, detailed work in the professional literature devoted to this important topic. This new book is designed to fill that gap, by supporting practitioners in developing an information needs analysis strategy, and offering the necessary professional skills and techniques to do so. It will offer guidance to team leaders and senior managers in all areas of library work, especially those involved in collection management, service provision and web development, and is equally applicable to the needs of academic, public, government, commercial and other more specialized library and information services. The text adopts a hands-on, jargon-free approach, and includes relevant examples, case studies, reader activities and sources of further reading. Key areas covered include:what is information needs analysis?how is needs analysis conducted?what are the varieties of needs analysis?how are analyses evaluated and reported? Readership: The book will be essential reading for library and information practitioners, team leaders and senior managers. It will also be a core text on course reading lists in departments of library and information studies.
For many applications powder metallurgy (PM) is the only way to economically produce so-called impossible materials e.g. homogenous fine grained immiscible materials, nanomaterials, highly alloyed segregation free tool steels or nickel base alloys, functionally graded materials, bonded hard materials or rare earth hard magnets, just to name few. The scope of this data collection is the authoritative coverage of critically evaluated and reviewed data on physical, chemical and mechanical properties, including information available from conference proceedings, company literature and the internationally very different standards on PM materials, industry catalogues and brochures, research reports and scientific journals. The collected data was so extensive that the editors decided to divide the volume in two parts, subvolume VIII/2A1: Metals and Magnetic Materials, and subvolume VIII2A2: Refractory, Hard and Intermetallic Materials. The editors are obliged to the authors which achieved a density of hard core information that will long stay unsurpassed and that is invaluable for application and for all practicians, engineers and scientists, which are working in this field.
Explore the captivating history of one of London's most iconic streets with "The Strand District: The Fascination of London," by Sir Walter Besant and Geraldine Edith Mitton. This meticulously researched volume delves into the rich tapestry of the Strand, offering a glimpse into its past and its enduring appeal. Journey through time as you discover the historical significance of this vital London artery. More than just a travel guide, this book illuminates the Strand's place in London history, revealing the stories embedded in its buildings and its very stones. Perfect for history enthusiasts, armchair travelers, and anyone fascinated by the allure of London's historical streets. Discover the Strand and its fascinating story in this timeless exploration of one of the world's great cities.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
This book discusses pure and applied chemistry studying polymers, materials and compounds with specific properties; as well as physical and chemical processes involved in this analysis. This new studies are the result of the first International conference "Compounds and materials with specific properties" celebrated in the Republic of Georgia, Eastern Europe, on 2007.
In the present monograph, theoretical structural analysis of the main processes of gas transport in polymeric materials (diffusion, solubility, permeability and selectivity) was offered. The mentioned analysis uses fractal (multifractal) analysis and cluster model of polymers amorphous state structure, based on the local order notions, as a tool for polymeric materials structure description. Besides, for the mentioned gas transport processes description, such modern physical treatments as a multifractal model of fluctuation free volume and the conception of anomalous (strange) diffusion were used. Such approach allows the quantitative description of gas transport processes and their prediction as a function of testing temperature, degree of crystallinity, cross-linking and grafting, and so on. Special attention is given to gas transport processes in multicomponent polymeric systems. A number of practical aspects of theoretical structural analysis application was considered in cases of thermal degradation, interfacial layers formation in polymer composites, stability to cracking in active environments and chemical reactions.
Nanotechnology is revolutionising the world of materials. The research and development of nanofibres has gained much prominence in recent years due to the heightened awareness of its potential applications in the medical, engineering and defence fields. Among the most successful methods for producing nanofibres is the electrospinning process. Electrospinning introduces a new level of versatility and broader range of materials into the micro/nanofibre range. An old technology, electrospinning has been rediscovered, refined, and expanded into non-textile applications. Electrospinning has the unique ability to produce ultrathin fibres from a rich variety of materials that include polymers, inorganic or organic compounds and blends. This book presents some fascinating phenomena associated with the remarkable features of nanofibres in electrospinning processes and new progress in applications of electrospun nanofibres.
