N. L. Choudhary – författare

The development of new synthetic drug compounds has resulted in the incorporation of many other disciplines, such as biochemistry and molecular biology, into medicinal chemistry. Compounds used as medicines are most often organic compounds, which are often divided into the broad classes of small organic molecules and “biologics”, the latter of which are most often medicinal preparations of proteins. Pharmaceutical chemistry or Medicinal chemists apply their chemistry training to the process of synthesizing new pharmaceuticals. They also work on improving the process by which other pharmaceuticals are made. In this field, it is to work with a team of scientists from different disciplines, including biologists, toxicologists, pharmacologists, theoretical chemists, microbiologists, and biopharmacists. This book provides updated information on various aspects of this subject. This book will be invaluable to students dealing with this topic.

Photochemistry, a sub-discipline of chemistry, is the study of chemical reactions that proceed with the absorption of light by atoms or molecules. Everyday examples include photosynthesis, the degradation of plastics and the formation of vitamin D with sunlight. The efficiency with which a given photochemical process occurs is given by its Quantum Yield. Since many photochemical reactions are complex, and may compete with unproductive energy loss, the quantum yield is usually specified for a particular event. The energy that is absorbed from light can result in photochemical changes in the absorbing molecule, or in an adjacent molecule (e.g., photosensitization). The energy can also be given off as heat, or as lower energy light, i.e., fluorescence or phosphorescence, in order to return the molecule to its ground state. The book will be an indispensable source for all professionals, researchers and students in this subject and for anyone working in the related areas for acquiring an up-to-date overviews.

Theoretical chemistry is the discipline that uses quantum mechanics, classical mechanics, and statistical mechanics to explain the structures and dynamics of chemical systems and to correlate, understand, and predict their thermodynamic and kinetic properties. Modern theoretical chemistry may be roughly divided into the study of chemical structure and the study of chemical dynamics. The former includes studies of:; electronic structure, potential energy surfaces, and force fields; vibrational-rotational motion; and equilibrium properties of condensed-phase systems and macro-molecules. Chemical dynamics includes: bimolecular kinetics and the collision theory of reactions and energy transfer; unimolecular rate theory and metastable states; and condensed-phase and macromolecular aspects of dynamics. This book is focused more on the theory than on the computation. It deals primarily with the basic ideas upon which theoretical chemistry is centred, and discusses the equations and tools that enter into the three main sub-disciplines of theory- electronic structure, statistical mechanics, and reaction dynamics.

Quantum Chemistry is a branch of theoretical chemistry, which applies quantum mechanics and quantum field theory to address issues and problems in chemistry. The description of the electronic behaviour of atoms and molecules as pertaining to their reactivity in one of the applications of quantum chemistry. Quantum chemistry lies on the border between chemistry and physics, and significant contributions have been made by scientists from both fields. It has a strong and active overlap with the field of atomic physics and molecular physics, as well as physical chemistry. Modern research in quantum chemistry is focused on improving its multi faceted utility calculating molecular properties. The book is designed to provide an integrated approach to the conceptual development of quantum chemistry and to its application in current research question. It is intended to be modest and straightforward, easily completed in its entirety either in one-semester formal course. This modern introduction to quantum chemistry covers quantum mechanics, atomic structure, and molecular electronics, and clearly demonstrates the usefulness and limitations of current quantum-mechanical methods for the calculation of molecular properties.

Food science is the applied science devoted to the study of food. The Institute of Food Technologists defines food science as "the discipline in which the engineering, biological, and physical sciences are used to study the nature of foods, the causes of deterioration, the principles underlying food processing, and the improvement of foods for the consuming public". The food you consume on a daily basis is the result of extensive food research, a systematic investigation into a variety of foods'' properties and compositions. After the initial stages of research and development comes the mass production of food products using principles of food technology. This textbook defines food science in simpler terms as "the application of basic sciences and engineering to study the physical, chemical, and biochemical nature of foods and the principles of food processing".