1). Derive the equation describing the time variation of the amount of microbes during the sterilization process. 2). Propose an acceptable A value. Justify your choice with equations. 3). Which model do you use to calculate the gas-liquid mass transfer? List the two main assumptions 4). Draw a schematic of the two-layer model including the real and assumed concentrations profiles in both phases. Name all relevant concentrations. 5). Write the equation for molar flow of oxygen from air into a liquid phase. Name all terms. 6). Assuming that there is significant resistance in both phases write the global mass transfer coefficient equation from the gas and from the liquid side. 7). Assuming that there is no resistance in gas phase write the equation for the global mass transfer coefficient from the liquid side. 8). Assuming that there is no resistance in liquid phase write the equation for the global mass transfer coefficient from the gas side