Indian Institute of Technology Bombay

About: Indian Institute of Technology Bombay is a education organization based out in Mumbai, India. It is known for research contribution in the topics: Catalysis & Computer science. The organization has 16756 authors who have published 33588 publications receiving 570559 citations.

Centrality determination of Pb-Pb collisions at root s(NN)=2.76 TeV with ALICE

Abstract: This publication describes the methods used to measure the centrality of inelastic Pb-Pb collisions at a center-of-mass energy of 2.76 TeV per colliding nucleon pair with ALICE. The centrality is a key parameter in the study of the properties of QCD matter at extreme temperature and energy density, because it is directly related to the initial overlap region of the colliding nuclei. Geometrical properties of the collision, such as the number of participating nucleons and the number of binary nucleon-nucleon collisions, are deduced from a Glauber model with a sharp impact parameter selection and shown to be consistent with those extracted from the data. The centrality determination provides a tool to compare ALICE measurements with those of other experiments and with theoretical calculations.

The Force Concept in Chemistry

Abstract: The applications, most of which have been developed in the last decade, of the Hellmann-Feynman (H-F) theorem in molecular quantum mechanics are reviewed. In general, the forces (on the nuclei of molecules) calculated with the use of this theorem provide great qualitative insight into the nature of the phenomena investigated; outstanding examples of these are in the concepts of chemical binding and molecular shapes. However, there are serious limitations in quantitative applications of the H-F theorem with approximate wave functions, since the calculated forces are extremely sensitive to small inaccuracies in the wave functions, especially near the nuclei of interest. Nevertheless, in view of the fact that it is difficult to discern general qualitative features in very accurate or ab initio molecular calculations, the H-F theorem is likely to be a highly useful tool for developing much needed qualitative chemical models which will be based on firm quantum mechanical foundations and will also remain open to quantitative extension, at least in principle.

Natural extracts using supercritical carbon dioxide

Abstract: INTRODUCTION Importance of Nature Cure Naturopathy Natural Extracts CO2 as an SCF Solvent SCFE Process SCFE Applications References Figure Captions - Chapter 1 Figures 11 - 13 FUNDAMENTALS OF SUPERCRITICAL FLUIDS AND PHASE EQUILIBRIA Process Schemes and Parameters in SCFE Thermodynamics of SCF State Variability of Density with P and T Addition of Cosolvent to SCF Solvent Solubility Behavior in SCF Solvent Solubility Isotherms and Cross Over Phenomena Solubility Isobars Pressure and Temperature Effects Solvent Capacity and Selectivity Cosolvent Effects SCF Phase Equilibrium Behavior Liquid-Fluid Phase Equilibria Solid-Fluid Phase Equilibria Polymer-Fluid Phase Equilibria Thermodynamic Modelling The Equation of State Approach Solid-Fluid Equilibrium Calculations Mixing Rules CS and GC Methods Solubility Predictions of Solid from Pure Components Properties Liquid-Fluid Equilibrium Calculations Mixing Rules Regression of Binary Adjustable Parameters Prediction of Multicomponent Data from Binary Interaction Constants Prediction of Phase Boundaries Mixture Critical Point Calculations Multiphase (L-L-V) Calculations Solubility Predictions Using Solvent-Cluster Interaction Model Solubility Calculations from Correlations Selectivity of Natural Molecules from Pure Component Solubilities Thermophysical Properties of CO2 Nomenclature References Figure Captions - Chapter 2 Figures 21 - 227 (b) FUNDAMENTAL TRANSPORT PROCESES IN SUPERCRITICAL FLUID EXTRACTION Transport Properties of SCFs Viscosity Diffusivity Thermal Conductivity Interfacial Tension Mass Transfer Behavior SCFE From Solid Feed Mechanism of Transport from Solids Stages of Extraction from Different Natural Materials SCFF from Liquid Feed Fractionation of Liquids by SFC Mass Transfer Modelling For SCFE from Solids Process Parameters Mass Transfer Coefficients Effect of Axial Dispersion and Convective Flows Shrinking Core Leaching Model Heat Transfer in SCFs Heat Transfer Coefficients Effects of Free Convective Flow Heat Transfer Coefficient for Two Phase Flow Heat Exchanger Specifications Nomenclature References Figure Captions - Chapter 3 Figures 31(a) - 316 FLAVOR AND FRAGRANCE EXTRACTS Market Demand Natural Essential Oils Methods of Recovery of Natural Essential Oils Steam Distillation Maceration Enfleurage Cold Expression Extraction with Volatile Organic Solvents Choice of Solvents Purification of Crude Extract Vacuum Distillation Molecular Distillation Liquid-Liquid Fractionation Supercritical CO2 Extraction Commercial Advantage SC CO2 Extracted Floral Fragrance Jasmine Fragrance Rose Fragrance Bitter Orange Flower Fragrance Lavender Inflorescence Fragrance Marigold Fragrance Sandalwood Fragrance Vetiver Fragrance References Figure Captions - Chapter 4 Figures 41 - 47(b) FRUIT EXTRACTS Importance of Recovery Citrus Oil Recovery During Juice Extraction Flavoring Components in Fruits Stability and Quality CO2 Extraction Processes Deterpenation of Citrus Oil by SC CO2 Dealcoholation of Fruit Juice by SC CO2 Enzyme Inactivation and Sterilization by +SC CO2 References Figure Captions - Chapter 5 Figures 51 - 56 SPICE EXTRACTS Importance of Recovery Classification of Spices Therapeutic Properties of Spices Spice Constituents Production of Spice Extracts SC CO2 Extraction and Fractionation Celery Seeds Red Chili Paprika Ginger Nutmeg Pepper Vanilla Cardamom Fennel, Caraway and Coriander Garlic Cinnamon Market Trends References Figure Captions - Chapter 6 Figure 61 HERBAL EXTRACTS Importance of Recovery Herbal Remedies Recovery Methods Antioxidative and Antimicrobial Constituents Anti-inflammatory Constituents Anti-Cancerous Alkaloids Anti-Carcinogenic Polyphenols Medicinal Constituents of Tea Extract Fat Regulating Agent Therapeutic Oils and Fatty Acids References NATURAL ANTIOXIDANTS Importance of Recovery Classification Botanicals with Antioxidative Activity Tocopherols as Antioxidants Recovery by SC CO2 Spice and Herbal Extracts as Antioxidants Recovery by SC CO2 Plant Leaf Extracts as Antioxidants Flavonoids Recovery of Flavonoids Carotenoids as Antioxidants Recovery of ? Carotene by SC CO2 Solubility of Antioxidants in SC CO2 References Figure Captions - Chapter 8 Figures 81 - 87 NATURAL FOOD COLORS Carotenoids as Food Colors Recovery of Carotenoids by SC CO2 Grass Orange Peel Turmeric Paprika Red Chili Carrot Marigold Flowers Annatto Other Natural Colors Anthocyanins as Food Colors Classification of Anthocyanins Recovery of Anthocyanins Commercial Anthocyanin-based Food Colors Betacyanins References Figure Captions - Chapter 9 Figures 91 - 92 PLANT AND ANIMAL LIPIDS Importance of Recovery Recovery Methods Separation of FFA from Vegetable Oil by SC CO2 Fractionation of PUFA from Animal Lipids Refining and Deodorisation of Vegetable Oil Fractionation of Glycerides Extraction of Oil from Oil Bearing Materials Sunflower Oil Corn Germ Oil Soybean Oil Olive Husk Oil Grape Seed Oil Animal Lipids Deoiling of Lecithin by SC CO2 Soya Phospholipids Oat Lecithin Canola Lecithin PC from Deoiled Cottonseed PC from Egg Yolk Dilipidation and Decholesterification of Food Butter Egg Yolk Powder Fish and Meat Muscles References Figure Captions - Chapter 10 Figures 101 - 1012 NATURAL PESTICIDES Importance of Recovery Bioactivity of Neem Neem Based Pesticides Azadirachtin-based Formulations Commercial Production Recovery of Azadirachtin from Neem Kernel Conventional Processes Supercritical CO2 Extraction Pyrethrum Based Pesticides Recovery of Pyrethrins Nicotine Based Pesticides Reovery of Nicotine by SC CO2 References APPENDICES Thermophysical Properties of Carbon Dioxide Definitions of Fatty Acids and Their Compositions in Various Oils Some Statistics on Major Vegetable Oils and Oilseeds INDEX