Suppose you have an initial chlorine concentration of 5%. Then out of that, you are told to prepare 1L chlorine solution with concentration of 200ppm to sanitize the stainless steel table at the processing area. How are you going to prepare the solution?
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Suppose you have an initial chlorine concentration of 5%. Then out of that, you are told to prepare 1L chlorine solution with concentration of 200ppm to sanitize the stainless steel table at the processing area. How are you going to prepare the solution?
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- What is the purpose of the vial that does not contain chara? (the solution with chara turned green showing that it is neutral) (the btb solution was yellow so it was acidic)0.33% sodium chloride 500mL has been ordered for a patient. The pharmacy carries only 0.9% sodium chloride 1000mL. How much diluent will you need?You have prepared the following serial dilution using tryptone broth:d1: 0.1ml culture + 9.9 ml brothd2: 300µl d1 + 4.7 ml brothd3: 0.2ml d2 + 9800 µl broth1) Write your dilutions as a rational number AND in scientific format? What was your total dilution (in scientific notation)?2) What was the original concentration of your culture if you spread 0.1 ml of d3 and counted360 cfu?
- What concentration of ethanol is considered optimum for disinfectant? Why not 100%?A pharmacist prepares 80 mL of an isotonic solution of 1.1 %w/v Lidocaine HCl (E-value 0.2). To prepare the solution, he dissolves Lidocaine HCl in purified water to make an isotonic solution. Then he dilutes the Lidocaine HCl solution with 0.9%w/v sterile sodium chloride to complete the formulation. How many milliliters of purified water is needed to make the formulation by this method?You are using a spectrophotometer to see whether you accurately performed a serial dilution of a colored water sample of unknown absorbance. You perform the following dilutions: Cuvet #1: 1600 uL of DI water + 400 uL of colored water Cuvet #2: 1600 uL of DI water + 400 uL of solution from Cuvet #1 Cuvet #3: 1600 uL of DI water + 400 uL of solution from Cuvet #2 What is the final dilution factor of your solution in Cuvet #3? 1:4 1:5 1:12 1:15 1:64 1:125 1:400
- You need to make 20 mL of a 1/100 (10-2) dilution of a crystal violet solution? How much diluting fluid will be required? Note: Your answer should be in numerical format to the nearest 0.1 mL.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. For "autoclaving" For Dry heat oven Can be sterilized only sterilization 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 dropperThree sugars (Sugar A, B and C) were applied to a line as part of the set-up of a Paper Chromatography experiment (method was as described in Practical Manual. After running the chromatography and staining, the following Retention factor (Rf) values were determined. Note that the distance travelled by the solvent was equal across the width of the chromatography paper. Sugar A, Rf = 0.23 Sugar B, Rf = 0.65 Sugar C, Rf = 0.27 What can be drawn from the results of this Paper Chromatography experiment? O Sugars A and C had a stronger interaction with the mobile phase, relative to Sugar B. O Sugar B had the strongest interaction with the stationary phase among Sugars A, B, and C. O Sugar B had the strongest interaction with the mobile phase among Sugars A, B, and C. O Distance travelled by Sugar B must have been shorter than that of Sugars A and C. O Sugar B must be a non-reducing sugar given its high Rf value.
- If you were asked to make a preservative, which combination would you choose to be more effective against the bacteria (Mustard + 0.5% acetic acid or Mustard +1% acetic acid)Sample contains (A, B, C, D) analyzed by thin layer chromatography using solvent system X the result showed: Rf Values: (A: 0.6, B: 0.8, C: 0.2, D: remained in the base line).1) If the sample was separated by using column chromatography. Which of these substances eluted first? And what is the detecting method? 2) If the sample was separated by using HPLC (1.Normal phase 2. Reversed phase) which RT of these substances comes first of both phases? And what is the meaning of RT? *UV detection in liquid chromatography requires that the analyte have a