Bøger af Ashok Kumar

Cancer is a devastating disease that affects almost all ages. Basically, cancer cells are those cells which have lost the usual control over their growth and division. They are characterized by immortalization, transformation and metastasis. Metastasis actually distinguishes a malignant tumor (ability to invade normal tissue) from a clinically benign tumor (do not invade normal tissue). Tumor formation may be spontaneous or induced by carcinogens or tumor viruses. On molecular basis it is caused by activation of oncogenes, loss of function of tumor suppressor genes, deregulation of DNA repair and genomic stability genes

Development in Wastewater Treatment Research and Processes: Innovative Trends in Removal of Refractory Pollutants from Pharmaceutical Waste Water sorts out emerging and burning issues faced by the pharmaceutical industry, along with common effluent treatment plans. The book provides a comprehensive view of recent advents of various novel, advanced and hybrid treatment technologies in pharmaceutical wastewater treatment to treat emerging pollutants released by the pharmaceutical industry in their untreated wastewater. In addition, the book gives insights into recent developments with a physico-chemical and microbiological focus on the treatment of emerging contaminants (pollutants) present in pharmaceutical wastewater.

Die in diesem Buch vorgestellten Forschungsarbeiten wurden am ältesten Einzeldee-Variable Energy Cylotron (VEC) der Welt durchgeführt, das an der Panjab-Universität in Chandigarh, Indien, installiert ist. Das klassische 26-Zoll-VEC ist in der Lage, Strahlen von 1H, 2H, 3H und 4He zu liefern. Seit fünfzehn Jahren wird die Anlage ausgiebig für die Ionenstrahlanalyse (IBA) mit Protonenstrahlen genutzt. Vor kurzem wurde die Anlage für die gleichzeitige Röntgen- und Rückstreuionenanalyse biologischer Proben standardisiert. Die Vorteile des Einsatzes gekoppelter Ionenstrahltechniken für die umfassende Elementanalyse von metallorganischen Proben sind unübertroffen. So wird die Standardisierung die Wechselwirkung von Metallionen mit Metalloproteinen erleichtern, die mit gleichzeitiger Partikel-induzierter Röntgenemissionsspektroskopie (PIXE) und Protonen-Elastik-Streuungsanalyse (PESA) untersucht werden. Die Kalibrierung des Beam Dumps wurde durchgeführt, um eine zuverlässige Schätzung der gesamten einfallenden Projektil-Ionen zu erhalten.

"There's Plenty of Room at the Bottom" ¿ this was the title of the lecture Prof. Richard Feynman delivered at California Institute of Technology on December 29, 1959 at the American Physical Society meeting. He considered the possibility to manipulate matter on an atomic scale. Indeed, the design and controllable synthesis of nanomaterials have attracted much attention because of their distinctive geometries and novel physical and chemical properties. For the last two decades nano-scaled materials in the form of nanofibers, nanoparticles, nanotubes, nanoclays, nanorods, nanodisks, nanoribbons, nanowhiskers etc. have been investigated with increased interest due to their enormous advantages, such as large surface area and active surface sites. Among all nanostructures, nanofibers have attracted tremendous interest in nanotechnology and biomedical engineering owing to the ease of controllable production processes, low pore size and superior mechanical properties for a range of applications in diverse areas such as catalysis, sensors, medicine, pharmacy, drug delivery, tissue engineering, filtration, textile, adhesive, aerospace, capacitors, transistors, battery separators, energy storage, fuel cells, information technology, photonic structures and flat panel displays, just to mention a few. Nanofibers are continuous filaments of generally less than about 1000 nm diameters. Nanofibers of a variety of cellulose and non-cellulose based materials can be produced by a variety of techniques such as phase separation, self assembly, drawing, melt fibrillation, template synthesis, electro-spinning, and solution spinning. They reduce the handling problems mostly associated with the nanoparticles. Nanoparticles can agglomerate and form clusters, whereas nanofibers form a mesh that stays intact even after regeneration. The present book is a result of contributions of experts from international scientific community working in different areas and types of nanofibers. The book thoroughly covers latest topics on different varieties of nanofibers. It provides an up-to-date insightful coverage to the synthesis, characterization, functional properties and potential device applications of nanofibers in specialized areas. We hope that this book will prove to be timely and thought provoking and will serve as a valuable reference for researchers working in different areas of nanofibers. Special thanks goes to the authors for their valuable contributions.

'Human in Khaki' strings together real life incidents and anecdotes of an Indian Police Service officer who having been born and bred in a rural landscape emerges from IIT Delhi with an intention to serve finding his true calling as a cop. Written in a 'short stories' mode the gripping narrative brings to the fore the essence of proactive people-oriented and effective policing. With the background of real life incidents the stories bring out different facets of how outcomes could have been much worse had the police not been sensitive and perceptive to the needs of the ordinary individuals who do not have the backing of wealthy or influential people. The book addresses contemporary issues that plague modern India such as terror the widening gap between the haves and have-nots crime against women the changing value system and most significantly basic police procedure that is designed to serve the powerless and yet mostly ends up serving a powerful few. It is a very bold and honest book from a serving Police Officer which depicts stark realities of policing at district level including the tout culture in Police Stations that keeps common man away from the Police. While the book should serve as a mirror to men in uniform and the public services about their own functioning it will also allow the public at large a 'peep' into the working of the police and thus encourage and empower the man-on-the street to ensure that he is served with greater efficiency.

In northern part of India maize-wheat is prominent cropping systems covering around 8.0 and 27.7 mha area under cultivation, respectively. Due to decline in soil organic matter, over mining of nutrient reserve and non-availability of cost effective fertilizer, productivity of this cropping system is declining. Among the various factors for improving productivity, nutrients particularly nitrogen plays a vital role. Fertilizers and biosources are the major sources of nitrogen supply for crops. But experiments revealed that continuous use of chemical fertilizers in an indiscriminate manner leads to deleterious effect on soil fertility and yield sustainability. This calls for a search on alternative sources of nutrients, which can at least partially substitute the fertilizer nitrogen for cereal-cereal system. Since, fertilizer is not a complete substitute for organic matter and vice-versa and their role is complementary to each other. Incorporation of farm waste as straw as well as practice of green manuring is viable options. Hence, an inquiry was made to explore the possibilities of substitution of fertilizer nitrogen through organic sources under maize-wheat sequence.