During reflux, what is the most suitable heater setting? How long the liquid needs to be boiled at this heat setting? options: A) Heater setting = 9, Continue heating till 2-3 mL of the liquid is left behind in the boiling flask. B) Heat setting = 9 for 30-45 minutes C) Heat setting = 6 for 30-45 minutes D) Heat setting = 5 for 45-60 minutes

Reflux involves the condensation of vapor and returns the condensate to the solution. It is one of…

Answered: During reflux, what is the most…

Basic Clinical Laboratory Techniques 6E

6th Edition

ISBN:9781133893943

Author:ESTRIDGE

Publisher:ESTRIDGE

Chapter2: Basic Hematology

Section2.5: Manual Red Blood Cell And White Blood Cell Counts

Problem 11RQ

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From a 5% normal saline (NaCl) solution, take 2 ml and dilute it 1:5. Take 5 ml of this solution and dilute it 1:10. A 2:100 dilution is made from this last solution. Determine: a) How many times less concentrated is the 2nd dilution than the original? b) What is the dilution factor in each step of the series and what is the final volume of each dilution? c) How many grams of NaCl will be in 1 ml of the last solution?
What does CFU stand for? Why do we use the term CFU instead of reporting bacteria per ml? Explain.
It is possible to measure the number of cells in a broth by measuring the amount of light that goes through the tube. (Spectrophometric analysis). This method measures both live and dead cells. If one measures the same sample by spectrophometric analysis and the spread plate method than a) The CFU>the number calculated by the spectrophometric analysis b) The CFU = the number calculated spectrophometric analysis c) The CFU
Which of the following statements is correct about column chromatography? a) Resolution improves as column length increases b) Mobile phase is a porous solid material kept in the column with appropriate chemical characteristics c) Stationary phase is a buffered solution that percolates through the mobile phase d) Large proteins exit the column faster than tiny proteins
fill in the blank (3 blanks for 3 tubes) with the correct dilution for each tube in the series.
If you transferred 15 mL of an undiluted sample into 35 mL of diluting fluid, what dilution have you created? (Note: provide your answer in decimal format to three decimal places.)
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 blanks
An iodine solution was sealed inside dialysis tubing, then immersed in a cup of water containing fructose and starch and allowed to react. Recall that iodine solution is red, Iodine + starch = purple. After reaction a) the color outside the dialysis bag would be (red, purple, clear) b) the color inside the bag would be purple (true/false) c) fructose would be present inside the dialysis bag (true/false)
Observe the following Plate counts and then determine the correct number of CFU/ml Plate 1 = 564 colonies at 10^-5 dilution Plate 2 = 422 colonies at 10^-6 dilution Plate 3 = 317 colonies at 10^-7 dilution Plate 4 = 93 colonies at 10^-8 dilution 93 x 10^10 CFU/ml 9.3 x 10^-9 CFU/ml 93 x 10^9 CFU/ml 93x 10^8 CFÜ/ml 93x 10^-8 CFU/ml asap please
You are observing the results from a standard plate count and you observe 53 CFUS. To make the plate count, you transferred 1 mL of a 10-4 dilution. How many CFU/mL are in the original sample? 1) 5.3 x 10-4 O 2) 5.3 x 103 O 3) 5.3 x 104 4) 5.3 x 105 O 5) 5.3 x 10-5
USING THE CONVERSION TABLE, MAKE THE FOLLOWING CALCULATIONS. 1) 26 lb= 2) 15 kg = 3) 3 oz =_ 4) 300g= 5) 4 Tbsp=_ 6) 800 mL = 7) 64 oz- 8) 1,800µg = 9) 800L= 10) 6mL= kg lb _mg mL cup. lb ML gotas. (Ctrl) - H
Oven sterilization at 121˚C was performed on glassware for 15 minutes only. Effect: Rationale:

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