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Compare and contrast the action of alcohols, halogens, and oxidizing agents in controlling microbial growth.
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- Describe the advantages and disadvantages of aldehyde agents in microbial control.Distinguish between the terms halophilic and halotolerant microorganisms. Give one example of each.List 5 physical methods of controlling microbial growth, and give an example of each. Why is moist heat much more effective than dry air?
- Design a concept map on microbial growth that would contain the key features of the following concepts (Requirements of microbial growth, Bacterial Growth, Control of Bacterial Growth and Antimicrobial methods).Explain the mechanism of action of several of the physical and chemical agents employed to control microbial growth.distinguish between antiseptics and disinfectants. Are the terms interchangeable? explain quantitative and qualitative proceedure in effects of chemicals in microbial populations.
- Oxygen is always beneficial to micro-organisms. Discuss this statement in the context of factors that influence microbial growth.Provide three reasons why the use of aseptic technique is essential when handling microbial cultures in the laboratory.What is the difference between a disinfectant and an antiseptic? Which is most effective at removing microbes from a product: sanitization, degerming, or sterilization? Explain
- Outline the different physical and chemical methods of sterilization. Briefly describe how each method control microbial growthExplain the usage as antimicrobial agents and disinfectants of Phenol and phenolics, alcohols, halogens, oxidizing agents, surfactants, Heavy metals, aldehydes, gaseous agents and enzymesDiscuss the principle of flame sterilization.