3- Why could using too much Ethanol actually lead to increased probability for contamination? O Excess liquid would provide an entry route for microorganisms O It is corrosive EtOH is not effective at killing O bacteria when used a too high a volume O Evaporation of the excess EtOH would lead to salt build up

3- Why could using too much Ethanol actually lead to increased probability for contamination? O Excess liquid would provide an entry route for microorganisms O It is corrosive EtOH is not effective at killing O bacteria when used a too high a volume O Evaporation of the excess EtOH would lead to salt build up

Body Structures & Functions

12th Edition

ISBN:9781285695495

Author:Scott

Publisher:Scott

Chapter16: Infection Control And Standard Precautions

Section: Chapter Questions

Problem 6RQ

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A PhD student leaving for vacation has asked an undergraduate student to perform daily media changes forhis iPSCs while he is gone. The culture is happening in 12-well plates where a volume of 2 mL is optimal. OnSaturday, when changing the media, the undergraduate decides to add 4 ml of media to the dishes (insteadof 2 ml) because he wants to skip lab and watch the Super Bowl on Sunday. He decides to add twice thevolume of media (4 mL) to tide the cells over till Monday. However, when the graduate student returns onMonday, he finds that some of his cells have died. Your job is to determine whether the cells died due to alack of oxygen. For the calculations that follow, diffusion and reaction occurs only in one direction. Also,assume that reaction only occurs at the cell-media interface. Use Michaelis-Menten type kinetics for oxygenuptake. You may use the following information:Ps = 150 mmHg (ambient oxygen tension)K = 1.19 nmol / mL / mmHg (solubility of oxygen in medium)D = 2…
A PhD student leaving for vacation has asked an undergraduate student to perform daily media changes forhis iPSCs while he is gone. The culture is happening in 12-well plates where a volume of 2 mL is optimal. OnSaturday, when changing the media, the undergraduate decides to add 4 ml of media to the dishes (insteadof 2 ml) because he wants to skip lab and watch the Super Bowl on Sunday. He decides to add twice thevolume of media (4 mL) to tide the cells over till Monday. However, when the graduate student returns onMonday, he finds that some of his cells have died. Your job is to determine whether the cells died due to alack of oxygen. For the calculations that follow, diffusion and reaction occurs only in one direction. Also,assume that reaction only occurs at the cell-media interface. Use Michaelis-Menten type kinetics for oxygenuptake. You may use the following information:Ps = 150 mmHg (ambient oxygen tension)K = 1.19 nmol / mL / mmHg (solubility of oxygen in medium)D = 2…