Chapter 3 Pressure-activated membrane processes M. J. LEWIS, Department of Food Science and Technology, The University of Reading, Reading RG6 6AP 3.1 INTRODUCTION Over the last 30 years, a number of membrane processes have evolved, which make use of a pressure driving force and a semi-permeable membrane in order to effect a separa- tion of components in a solution or colloidal dispersion. The separation is based mainly on molecular size, but to a lesser extent on shape and charge. The three main processes

Chapter 2 Supercritical fluid extraction and its application in the food industry DAVID STEYTLER, School of Chemical Sciences, University of East Anglia, Norwich NR4 7TJ 2.1 INTRODUCTION Solvent extraction is one of the oldest methods of separation known and certainly dates back to prehistory. The science of solvent extraction has evolved accordingly over a long period of time and much progress has been made in the understanding of solvation and

Chapter 1 Separation processes-an overview A. S. GRANDISON and M. J. LEWIS Department of Food Science and Technology, The University of Reading, Whiteknights PO Box 226, Reading, RG6 6AP 1.1 FOODS- THE RAW MATERIAL Food and drink play a vital role in all our lives, providing us with the nutrients essential

第一章微生物在食品工业中的应用 第二章微生物引起的食品腐败变质 第三章微生物与食品卫生 第四章微生物与食品保藏

Who might be immuno-compromised or have a weakened immune system? Examples of persons with weakened immune systems include those with AIDS; cancer and transplant patients who are taking certain immunosuppressive drugs; and those with inherited diseases that affect the immune system

Dr Jean W Flour Major Components of Flour Moisture 12.13% Protein 8-15% Starch 74-76%

What is an enzyme? A biological catalyst that promotes and speeds up a chemical reaction without itself being altered in the process. Lowers the activation energies of a substance

Composition of eggs %o Water Protein Fat CHO Whole10074.612.111212 White5888.010.10.20.8 Yok314801643292.0

Experimental Foods Carbohydrates Starch and Sugars Alternative Sweeteners

Heat Treatments bLanching- Heat to deactivate enzymes Pasteurization Heat to kill pathogenic bacteria Sterilization heat to kill all bacteria and other organisms