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- What are the advantages and disadvantages of the filter method in the analysis of water samples? Why is the incubation temperature critical for this test?Explain why is it important to follow proper precautions and use aseptic technique when working with clinical samples.In sterilization, which among the supplies, instruments, glassware, etc. under the list of materials can be sterilized using either or both equipment below? List them down under the category: a) For “autoclaving” only, B) For Dry heat oven sterilization ,And C) Can be sterilized with either. Materials: 200-ml Erlenmeyer flask Stove 500-ml Erlenmeyer flask Autoclave 10-mL graduated cylinder Analytical balance 100-ml graduated cylinder pH meter Spatula Stirring rod 100-mL beaker Test tubes Distilled water Petri dish Stirring rod Alcohol lamp Glass dropper
- Design a serial dilution of a sample to achieve a A) Final dilution of 10-4 using 9.0 mL blanks B) Final dilution of 10-6 using 99 mL blanks C) Final dilution of 10-6 using 9.0 mL blanksWhat are the common three most important environmental considerations for the production, dissemination and contamination of compounds as different as detergents, insecticides, or electrical insulator fluids?Discuss the correct laboratory technique in using the centrifuge for qualitative analysis. Give two tips on its proper use. Explain how calcium ions are confirmed present in a solid salt by using flame test. Discuss a method to confirm the presence of a) phenol and b) ketone in a test compound. How are proteins confirmed present in a sample? Explain the laboratory process.
- How is storage and transportation affect your samples results in general?From a water sample, you must determine the number of colonies present (CFU's/ml.). However, looking at the plates of the dilutions you find some cultures with scattered colonies. Briefly explain the reason for eliminating or not considering these plates in the data collection. Short answer please..Differentiate individual sampling and pooled sampling in dissolution.