Bøger af Rajeev Ranjan

The field of molecular biology has become increasingly important in recent years, as scientists seek to understand the molecular mechanisms underlying the complex processes of life. This comprehensive molecular biology book is designed to provide students with a deep understanding of these mechanisms, preparing them for knowledge and competitive examinations. The book covers all the fundamental concepts, theories, and techniques of molecular biology, from the structure and function of biomolecules to genetic material, gene expression, and regulation, recombinant DNA technology, genomics, and proteomics. Written in a clear and concise manner, the book is an ideal resource for both learners and instructors. This book is a valuable resource for academic students as well as students preparing for exams such as the NEET, Medical entrances, Grade 11 and 12, IB Diploma, Cambridge A and AS Level, B.Sc. (H), B.Sc. Life Science, GRE, CSIR-NET, GATE, and more. With its comprehensive coverage, this molecular biology book is a must-have for anyone seeking to deepen their understanding of the molecular basis of life.

This book is concerned an experimental study of turning on Austenitic Stainless steel of grade AISI 202. The objective is to optimize machining parameters so as to minimize the surface roughness and maximize the MRR for the selected work materials in the chosen domain of the experiment. The experiment has been conducted in an experiment matrix of Taguchi L9 experiment. The relationship between the machining parameters and the response variables have been modelled and analyzed using the optimization plot. Analysis of Variance (ANOVA) was used to investigate the significance of these parameters on the response variables, and to determine a regression equation for the response variables with the machining parameters as the independent variables, with the help of a quadratic model. Main effects and interaction plots from the ANOVA were obtained and studied along with contour and 3-D surface plots.

Solar air heater is one of the basic equipment through which solar energy is converted into thermal energy. A solar air heater is a type of heat exchanger which transfers solar radiation into heat energy. Solar air heaters, because of their simple designing, are cheap and most widely used as a collection devices of solar energy. Solar air heaters are one of the simplest and cost effective solar energy utilization systems for various drying applications. The thermal efficiency of solar air heaters is found to be low due to low heat transfer coefficient on the air side. Attempts have been made to enhance the heat transfer rate from the absorber plate to air by using different roughness elements. Enhancement of heat transfer coefficient is achieved by providing artificial roughness, always goes with an increment of pressure drop and more pumping power is required. So, there is a need to optimize the system parameters to maximize heat transfer, while keeping the friction losses as low as possible.