You saw no color change in both the first step and second step of the Nitrate Reduction test. What is the result of this experiment? Also, explain what happens when an excessive amount of zinc is added in the second step of this test.
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You saw no color change in both the first step and second step of the Nitrate Reduction test. What is the result of this experiment? Also, explain what happens when an excessive amount of zinc is added in the second step of this test.
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- Why do we add powdered zinc to the nitrate reduction test?Why are basic dyes more effective for bacterial staining than acidic dyes? State two ways that can confirm whether a bacterial smear has been correctly prepared or not. Why should you be careful not to underheat a smear during the heat-fixing process? Why do you think the presence of grease or dirt on a glass slide will result in a poor smear preparation? Cite two or three reasons.Can you show the step by step process of Methyl Red test using a schematic diagram?
- Can you show the step by step process of Nitrate Redution Test using a schematic diagram?What is the function of the mordant used in the Gram staining procedure? If the iodine step is skipped, what color are Gram-negative cells observedWhat are the mechanisms of samples separation work in Thin layer Chromatography? Please shortly write at your own words. Answer should be to the point (5-6 lines maximum).
- In this experiment, a culture was serially diluted to the concentrations below. Each plate was plated with 0.25mL of the dilution. Using the most diluted plate, what is the correct concentration of the original culture? A) 2.0 X 10^-3 cells/mL B) 2.0 X 10^5 cells/mL C) 4.0 X 10^5 cells/mL D) 5.0 X 10^4 cells/mLwhere will you dispose of the waste from Molisch test?The Duquenois–Levine test is a valuable color test for___________.
- The agar turns pink because the enzyme produces blank which causes a ph change to blank?What would be the expected out come of a Nitrate reduction test If the bacteria is a pathogenic intestinal bacteria?You perform a nitrate test. After adding solutions A and B, the broth remains colorless. Why should you not interpret this as a negative test? What do you do next, and how do you interpret the results?