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Health Science

PHASE TRANSITIONS IN POLYMERS - STEPHEN Z.D. CHENG (EX)

Author

STEPHEN Z.D. CHENG

Cover Price : Rs 2,995.00

Imprint : Elsevier
ISBN : 9789382291121
YOP : 2013

Binding : Hardback
Total Pages : 324
CD : No

Phase transition play a central role in connecting the field of structural analysis and dynamics in changes. This book attempts to utilize the concepts of metastable states and metastability to link these two research fields and illuminate the physics beind polymeric phase transitions. A classical metastable state possesses a local free energy minimum at infinite size but not a global one, This concept is phase size independent. We now know that two types of metastable states can be identified. The first type is associated with the supercooling or superheating of a phase before a phase transition has time to occur, while the second type is associated with competing kinetic pathways caused by the existence of multiple free energy paths to reach the equilibrium phase. We have studied a number of experimental results and proposed that there are a wide range of metastable states in polymers at different length and time scales. The effect of phase size on metastability is specifically introduced and discussed. Metastable states can be identified by structural and morphological investigations of crystallization along with mesophase transitions, liquid-liquid phase separation, vitrification and gel formation, as well as combinations of these transformation processes. The phase behavior of polymers is thus dominated by the interdependence of metastable states at different length and time scales. Contents Foreword Preface and Acknowledgments 1. Introduction. 1.1. Phases in single component systems 1.2. Phase transitions in single component systems. 2. Thermodynamics and kinetics of phase transitions. 2.1. Thermodynamics of phase transitions in single component systems. 2.2. Kinetic aspects of phase transitions in single component systems. 2.3. Phase and phase transitions in mutiple component system 3. Concepts of metastable states. 3.1. Ostwald’s stage rule and definition of a metastable state. 3.2. Examples of metastable states in phase transitions. 3.3. Appearance of metastable states controlled by competing kinetics. 3.4. What are the limitations of this current understanding of metastable states? 3.5. Concept of metastability. 4. Metastable states in phase transitions of polymers. 4.1. Supercooled liquids and crystallization. 4.2. Superheated crystals and crystal melting. 4.3. Metastable states in phase separated polymer Blends and copolymers. 5. Metastable states observed due to phase transformation kinetics in polymers. 5.1. Appearance of metastable states based on their crystal nucleation barriers. 5.2. Polymorphs and their competing formation kinetics. 5.3. Monotropic phase transitions in polymers. 5.4.Surface and interface induced metastable phases. 6. Interdependence of metastable states on different length scales. 6.1. Combining phase size effect with polymorphs. 6.2. Liquid-liquid phase separation coupled with vitrification. 6.3. Liquid-liquid phase separation coupled with crystallization. 6.4. Liquid-liquid phase separation associated with gelation and crystallization. 7. Outlook - A personal view. Index.

Practical Public Health Nutrition (EX)

Author

Roger Hughes
Barrie M. Margetts

Cover Price : $ 71.99

Imprint : Blackwell / Ane Books
ISBN : 9781405183604
YOP :

Binding : Paperback
Total Pages : 304
CD : No

Providing the reader with a practice-focussed approach to public health nutrition intervention management, Practical Public Health Nutrition is a crucial resource for dietitians, community and public health nutritionists and related health professionals in need of a practical guide to practicing public health nutrition. Internationally recognised experts Hughes and Margetts describe in detail the rationale, processes and tools that can be used to assess population needs, analyse problems and develop effective interventions at a community level. Exercises in each section of the book contribute to a collective PHN intervention plan, providing the reader with the opportunity to demonstrate an outcome of intervention management. Unique in its approach to teaching the practical applications of this increasingly crucial discipline, Practical Public Health Nutrition is a vital purchase for anyone working in the public health arena. • Clearly outlines the practice of PHN intervention management • Covers rationale, processes and tools needed to develop effective interventions at community level • Written by two internationally respected authorities on the discipline of Public Health Nutrition • Essential text for dietitians, community and public health nutritions and related health professionals Contents Preface. Acknowledgements. Glossary. Part 1 Introduction and context. 1 The big picture: The context for a textbook on public health nutrition practice. 2 Defining public health nutrition as a field of practice. 3 A framework for public health nutrition practice. Part 2 Intelligence. 4 Step 1: Community engagement and analysis. 5 Step 2: Problem analysis. 6 Step 3: Stakeholder analysis and engagement. 7 Step 4: Determinant analysis . 8 Step 5: Capacity analysis. 9 Step 6: Mandates for public health nutrition action. 10 Step 7: Intervention research and strategy options. 11 Step 8: Risk assessment and strategy prioritisation. Part 3 Action. 12 Step 9: Writing action statements. 13 Step 10: Logic modelling. 14 Step 11: Implementation and evaluation planning. 15 Step 12: Managing implementation. Part 4 Evaluation. 16 Step 13: Process evaluation. 17 Step 14: Impact and outcome evaluation. 18 Step 15: Evaluating capacity gains. 19 Step 16: Economic evaluation . 20 Step 17: Reflective practice and valorisation. Appendices. 1 Intervention plan template. 2 Capacity building analysis tool. References. Index. Professor Roger Hughes is based at Griffith University, Gold Coast Campus, Australia. Professor Barrie Margetts is based at the University of Southampton, UK.


   

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