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Ashok Kumar - Author

About the Author

Books by Ashok Kumar

Drugs in Obstetrics & Gynecology

Drugs in Obstetrics & Gynecology

Author: Ashok Kumar, Krishna Agarwal, Sudha Prasad Format: Paperback / softback Release Date: 20/01/2020

Supermacroporous Cryogels Biomedical and Biotechnological Applications

Supermacroporous Cryogels Biomedical and Biotechnological Applications

Author: Ashok Kumar Format: Paperback / softback Release Date: 12/12/2019

The process of cryogelation has been vigorously studied over the past two decades, with recent research focussing on applications of these polymer systems in various biomedical and biotechnological fields. While there is significant literature available as research publications, limited reviews, and book chapters, Supermacroporous Cryogels: Biomedical and Biotechnological Applications is the first dedicated book on the subject. It thoroughly explores all aspects of cryogels from synthesis to applications in medical and biotechnological research and practice. Presenting the work of researchers from around the globe, this book addresses three key components of cryogelation, starting with an overview of the unique inherent properties of cryogels and their synthesis and optimization from various natural and synthetic polymers. It also focusses on the surface modification of cryogels as well as factors that affect their properties. The second component is a discussion of the biomedical aspects of cryogels, categorically describing their biocompatible nature and their recent usage in medical imaging by creating phantoms of various tissues and using tissue engineering to regenerate various tissues. The third reviews a wide range of applications of cryogels in biotechnology, including biocatalysis, cell separation, wastewater treatment, high throughput processes, and bioreactors. A comprehensive look at the process of cryogelation and an up-to-date account of significant developments in cryogel research, Supermacroporous Cryogels provides a single source of information beneficial to unacquainted readers as well as experts wanting to know about current research and practice regarding cryogels in medicine, technology, chemistry, and materials science and engineering.

Microbes and Enzymes in Soil Health and Bioremediation

Microbes and Enzymes in Soil Health and Bioremediation

Author: Ashok Kumar Format: Hardback Release Date: 03/12/2019

Microbial enzymes play a vital role in maintaining soil health and removing pollutants from contaminated land. Soil microflora is closely associated with maintaining soil fertility, and the use of chemical pesticides, fertilizers and other volatile sprays in agriculture threatens the health ofthe microbial population in the soil. Every single particle of healthy soil contains millions of bacteria, which interact with the nutrients available, sustaining the nutrient cycle and making this microflora an essential component of life on earth. How do microbes help in the nutrient cycle? Either by intracellular digestion of macromolecules and converting these into smaller units in their metabolic pathways, or by secreting enzymes into the extracellular environment to facilitate the conversion of complex macromolecules into micro-molecules that can be easily absorbed by other living species. To meet demands for energy and food for the growing global population, it is important to protect agricultural land from contamination and maintain its productivity. Heavy metal ions from contaminated land canenter crops, fish or aquatic organismsvia contaminated water, and theseare then taken up by the human body, where they can accumulate and alter the normal microflora. The microbiological component of the soil is ahighly complex system and is still not fully understood. How do microbes survive in the changing physicochemical environment of soil?. This book helps readers understand the mechanism, various routes of microbialsoil remediation, the interactionsof different genera, and how microbial enzymes support the sustainable restoration of healthy soil.

Plant Growth Promoting Rhizobacteria for Agricultural Sustainability From Theory to Practices

Plant Growth Promoting Rhizobacteria for Agricultural Sustainability From Theory to Practices

Author: Ashok Kumar Format: Hardback Release Date: 10/07/2019

To meet the food security needs of the 21st century, this book focuses on ecofriendly and sustainable production technologies based on plant growth promoting rhizobacteria (PGPR). It is estimated that the global population could increase to 9 billion by 2050. Further, the amount of land devoted to farming has decreased. Soil is a living entity, and is not only a valuable natural resource for agricultural and food security, but also for the preservation of all life processes. Agricultural productivity rests on the foundation of microbial diversity in the soil, and in recent years, PGPR have emerged as an important and promising tool for sustainable agriculture. The injudicious use of agrochemicals by farmers has created a range of negative impacts, not only threatening the environment, but also destroying useful microorganisms in the soil. The efficient use of PGPR reduces the need for these chemicals while simultaneously lowering production costs. In turn, increased yields could provide a more favourable environment and encourage sustainability. This book assesses the impacts of PGPR on crops, environmental and socio-economic sustainability, and demonstrates these ecofriendly technologies' three critical advantages, namely (a) enhanced crop productivity, (b) reduced application of agrochemicals, and (c) increased incomes for farmers. Besides offering an economically attractive and ecologically sound means of augmenting the nutrient supply and combatting soil-borne pathogens, PGPR play an important part in boosting soil fertility, bioremediation and stress management for the development of ecofriendly and sustainable agriculture.

Urban and Regional Planning Education Learning for India

Urban and Regional Planning Education Learning for India

Author: Ashok Kumar Format: Paperback / softback Release Date: 27/05/2018

This is the first volume exclusively dedicated to planning education, with a focus on India and learning from global experiences for India. Prior to the 1990s, planning education in India was largely confined to national and local economic concerns. Within a globalized scenario, such pedagogies and theories have become outmoded. With new concerns emerging in planning, new pedagogical tools and theorizations need to be developed within planning curricula to provide today's planners with the wherewithal to adapt to changing and globalizing cities and regions in India. Therefore, the eminent contributors to this volume deal exclusively and comprehensively with planning education in a globalized context. Divided into four thematic sections, this volume provides a comprehensive view of planning education in India, with focus on: * The trajectory of planning education in India.* The kinds of knowledge used for teaching in Indian planning schools, and whether some sort of integration of diverse knowledges is achieved. * The ethical foundations of urban and regional planning in Indian planning schools. * The role of international planning perspectives in providing new insights for Indian planning education. Comprehensive and topical, this volume is of interest to academics and researchers from planning institutes, urban and regional planners and policy makers, as well as architects, social geographers and economists.

Energy Storage and Conversion Materials and Devices

Energy Storage and Conversion Materials and Devices

Author: Ashok Kumar, Shyamal Kumar Das Format: Hardback Release Date: 31/10/2016

Energy Storage and Conversion primarily focuses on topics profoundly relevant to electrochemical devices such as rechargeable batteries, supercapacitors and fuel cells. Ion transport plays a pivotal role in the overall output efficiency of these devices. Faster ion transport remains a limiting barrier for achieving high power/energy density electrochemical energy storage and generation devices. Hence, ion conducting materials hold the most notable key to the development of such devices. These devices have established themselves as indispensable in modern society. Their uses range from small scale electronics to large scale electric vehicles. As the scope of this research area is expanding significantly, researchers worldwide are working on increasing number of systems where the ionic conductivity in solid electrolytes is comparable not only to liquid electrolytes but to the electronic conductivity in semiconductors or metals. The outcome will certainly be reflected with emergence of high energy and power density energy storage and generation technologies. This book highlights some of the latest advances in ionic materials and their implementation in batteries, supercapacitors and fuel cells.

Urban and Regional Planning Education Learning for India

Urban and Regional Planning Education Learning for India

Author: Ashok Kumar Format: Hardback Release Date: 28/04/2016

This is the first volume exclusively dedicated to planning education, with a focus on India and learning from global experiences for India. Prior to the 1990s, planning education in India was largely confined to national and local economic concerns. Within a globalized scenario, such pedagogies and theories have become outmoded. With new concerns emerging in planning, new pedagogical tools and theorizations need to be developed within planning curricula to provide today's planners with the wherewithal to adapt to changing and globalizing cities and regions in India. Therefore, the eminent contributors to this volume deal exclusively and comprehensively with planning education in a globalized context. Divided into four thematic sections, this volume provides a comprehensive view of planning education in India, with focus on: * The trajectory of planning education in India.* The kinds of knowledge used for teaching in Indian planning schools, and whether some sort of integration of diverse knowledges is achieved. * The ethical foundations of urban and regional planning in Indian planning schools. * The role of international planning perspectives in providing new insights for Indian planning education. Comprehensive and topical, this volume is of interest to academics and researchers from planning institutes, urban and regional planners and policy makers, as well as architects, social geographers and economists.

Supermacroporous Cryogels Biomedical and Biotechnological Applications

Supermacroporous Cryogels Biomedical and Biotechnological Applications

Author: Ashok Kumar Format: Hardback Release Date: 25/02/2016

The process of cryogelation has been vigorously studied over the past two decades, with recent research focussing on applications of these polymer systems in various biomedical and biotechnological fields. While there is significant literature available as research publications, limited reviews, and book chapters, Supermacroporous Cryogels: Biomedical and Biotechnological Applications is the first dedicated book on the subject. It thoroughly explores all aspects of cryogels from synthesis to applications in medical and biotechnological research and practice. Presenting the work of researchers from around the globe, this book addresses three key components of cryogelation, starting with an overview of the unique inherent properties of cryogels and their synthesis and optimization from various natural and synthetic polymers. It also focusses on the surface modification of cryogels as well as factors that affect their properties. The second component is a discussion of the biomedical aspects of cryogels, categorically describing their biocompatible nature and their recent usage in medical imaging by creating phantoms of various tissues and using tissue engineering to regenerate various tissues. The third reviews a wide range of applications of cryogels in biotechnology, including biocatalysis, cell separation, wastewater treatment, high throughput processes, and bioreactors. A comprehensive look at the process of cryogelation and an up-to-date account of significant developments in cryogel research, Supermacroporous Cryogels provides a single source of information beneficial to unacquainted readers as well as experts wanting to know about current research and practice regarding cryogels in medicine, technology, chemistry, and materials science and engineering.

Textbook of Movement Disorders

Textbook of Movement Disorders

Author: Ashok Kumar Format: Paperback / softback Release Date: 15/01/2014

Movement disorders in neurology concern involuntary movements of parts of the body. Many movement disorders are caused by nerve diseases such as Parkinson's disease. Other causes include injuries, autoimmune diseases, infections and certain medicines. Many movement disorders are inherited so run in families (MedlinePlus). This book is a comprehensive guide to movement disorders for practising neurologists and trainees. Divided into 55 chapters, it discusses the basic science, clinical concepts, diagnosis and treatment of numerous conditions. Parkinson's disease is covered in-depth and complete chapters are dedicated to movement disorders in children, MR imaging, and emergencies in movement disorders. Presented in an easy to read format, this manual includes 800 clinical photographs, illustrations and tables, as well as extensive references for each chapter. Key points Comprehensive guide to movement disorders for practising neurologists and trainees Parkinson's disease covered in-depth Includes 800 images, illustrations and tables Extensive references for each chapter

Algorithmic and Architectural Gaming Design Implementation and Development

Algorithmic and Architectural Gaming Design Implementation and Development

Author: Ashok Kumar Format: Hardback Release Date: 15/07/2012

Algorithmic and Architectural Gaming Design: Implementation and Development discusses the most recent advances in the field of video game design, with particular emphasis on practical examples of game development, including design and implementation. The target audience of this book includes educators, students, practitioners, professionals, and researchers working in the area of video game design and development. Anyone actively developing video games will benefit from the practical application of fundamental computer science concepts demonstrated in this book.

Cell Separation Fundamentals, Analytical and Preparative Methods

Cell Separation Fundamentals, Analytical and Preparative Methods

Author: Ashok Kumar Format: Paperback / softback Release Date: 19/11/2010

Cell separation, which was once limited to merely being a basic technique for fractionating different cell populations, has come a long way in the last two decades. New, advanced and more speci?c and selective techniques have emerged as the demand for isolating a speci?c cell type for various biological applications has increased. Ef?cient and cost-effective techniques for fr- tionation and isolation of target cell types are necessary to provide pure cell populations for diagnostics, biotechnological and biomedical applications. One can see a considerable need, both in biomedical research and in di- nostic medicine, for the speci?c separation of a discrete population of cells from a mixture. For example, in the ?eld of tissue engineering, isolation of stemcellsfromtissuesororgansisofparticularlygreatimportance.Moreover, understanding cell developmental pathways becomes increasingly signi?cant as diagnosis and treatment of diseases turns more to the molecular level. The diagnosis of cell-related diseases requires methods of detection, isolation and theanalysisofindividualcells,regardlessoftheirrelativecontentinthetissue. Since cell-based therapies now turn towards more realistic medical options, developing an effective separation system for large-scale cell separation has becomechallengingresearchgoalforcellbiologistsandbiotechnologists.The ideal technique should provide in a short time a good yield of cells with high puritywhile maintaining cellfunction.Despite the growingneed formethods to separate cells into cell subpopulations, the existing cell-separation te- niques stillhave somelimitations when the desired degree ofperformance on apreparativescaleisrequired.Wewillseemoreresearchfocusinthisdirection in the future. The traditional techniques of micro?ltration, ultra?ltration and ultrac- trifugation, which exploit differences in cell size, shape and density, have remainedtheworkhorsesdespitelowspeci?cityandproblemswithscalingup.

Science and Technology of Chemical Mechanical Planarization (CMP): Volume 1157

Science and Technology of Chemical Mechanical Planarization (CMP): Volume 1157

Author: Ashok Kumar Format: Hardback Release Date: 31/03/2010

This book demonstrates the swift progress achieved in the field of diamond for electronic and bioelectronic applications. Predicted to become the 'ultimate semiconductor' in the early 1990s, diamond initially failed to match the impressive developments made with other wide-bandgap semiconductors. The situation is changing, with single-crystal electronic-grade diamond becoming a commercially available material. As importantly, the spectacular properties of single-point defects in diamond, as well as its superlative thermal conductivity, radiation 'hardness' and inherent biocompatibility, are being recognized as vital for devices used in biosensing, quantum informatics, and environmentally challenging applications. Not all recent advances relate to single-crystal diamond. Nanocrystalline diamond (NCD), ultra-nanocrystalline diamond (UNCD) and diamond-like carbon (DLC) are very important forms of carbon, as are multiphase carbon nanostructures and graphene. It features results in all areas of high-performance diamond research. Chemical, electrochemical, and biochemical sensing, including nanodiamond for sensing in-cellular environment and the integration of diamond within biological systems are highlighted.

Common Medical Disorders in Obstetrics

Common Medical Disorders in Obstetrics

Author: Ashok Kumar Format: Paperback / softback Release Date: 09/10/2009

Cell Separation Fundamentals, Analytical and Preparative Methods

Cell Separation Fundamentals, Analytical and Preparative Methods

Author: Ashok Kumar Format: Hardback Release Date: 08/11/2007

Cell separation, which was once limited to merely being a basic technique for fractionating different cell populations, has come a long way in the last two decades. New, advanced and more speci?c and selective techniques have emerged as the demand for isolating a speci?c cell type for various biological applications has increased. Ef?cient and cost-effective techniques for fr- tionation and isolation of target cell types are necessary to provide pure cell populations for diagnostics, biotechnological and biomedical applications. One can see a considerable need, both in biomedical research and in di- nostic medicine, for the speci?c separation of a discrete population of cells from a mixture. For example, in the ?eld of tissue engineering, isolation of stemcellsfromtissuesororgansisofparticularlygreatimportance.Moreover, understanding cell developmental pathways becomes increasingly signi?cant as diagnosis and treatment of diseases turns more to the molecular level. The diagnosis of cell-related diseases requires methods of detection, isolation and theanalysisofindividualcells,regardlessoftheirrelativecontentinthetissue. Since cell-based therapies now turn towards more realistic medical options, developing an effective separation system for large-scale cell separation has becomechallengingresearchgoalforcellbiologistsandbiotechnologists.The ideal technique should provide in a short time a good yield of cells with high puritywhile maintaining cellfunction.Despite the growingneed formethods to separate cells into cell subpopulations, the existing cell-separation te- niques stillhave somelimitations when the desired degree ofperformance on apreparativescaleisrequired.Wewillseemoreresearchfocusinthisdirection in the future. The traditional techniques of micro?ltration, ultra?ltration and ultrac- trifugation, which exploit differences in cell size, shape and density, have remainedtheworkhorsesdespitelowspeci?cityandproblemswithscalingup.