How would you prepare 10 to the power -4 dilution from a culture?

What is meant by the term plating efficiency?

25. Assume we are performing a 2x serial dilution series of methylene similar to WL-1. If your original, 1x tube is designated "Tube 1", then what would be the relative concentration of methylene blue in Tube 4? a. Tube 4 is the 8x dilution tube. The concentration of methylene blue in this tube is 1/8 that of the original tube. b. Tube 4 is the 8x dilution tube. The concentration of methylene blue in this tube is 8 times that of the original tube. c. Tube 4 is the 4x dilution tube. The concentration of methylene blue in this tube is 4 times that of the original tube. d. Tube 4 is the dilution 10x tube. The concentration of methylene blue in this tube is 1/10 that of the original tube. e. None of the above

So would it be 22kD after conversion? Option are in kD. 67, 52, 22, and 13kD

Which of the following types of data produce curves similar in shape to the graph? Select all that apply 1.Bacterial growth in a culture 2.A normal distribution of height in a population of students 3.Exponential population growth 4.Haemoglobin binding of oxygen 5.Log transformations of drug dose curves 6.Osmotic fragility of red blood cells 7.A standard curve for an enyme assay

I was trying to set this problem where the units cancel out. You are given ampicillin, with a recommended dose of 35 mg/kg , to a child with a mass of 21 kg. If stock on hand is 250 mg/ capsule, how many capsules should be given. How should I set this conversion problem up and it's also asking to express the number of capsules as an integer

7. E. Coli bacteria were grown in a 5.0 L batch cell culture reactor, with the following data collected: Cell Count (per mL) 10,277,000 Inoculation Time ---> Time 11:19 am 11:35 am 11:57 pm 12:08 pm 12:45 pm 1:07 pm 1:11 pm 1:16 pm 1:19 pm 1:34 pm 1:46 pm 1:57 pm 2:09 pm 2:33 pm 10,313,000 20,984,000 29,750,000 60,202,000 210,909,000 224,750,000 227,960,000 229,216,000 229,115,000 227,260,000 204,935,000 183,745,000 146,103,000 (inoculation is when the cells are first put in the growth media) A. Draw a log10 X vs. time graph and label the phases for batch cell growth. B. Calculate the specific growth rate, μ, and mass doubling time, td, for the exponential growth phase. C. Calculate kd, the specific rate of cell mass loss due to cell death (For B & C, it will be helpful to re-plot the y-axis as In X or In (X/X.), and focus on only the data in that phase) Using spreadsheet software will be helpful in drawing this graph and analyzing data for parts B & C. Be as quantitative as possible,…

6. A valid question for Jim's next experiment would be? a) is strawberry production different in lime treated vs. normal (unacidic) soil? b) Does Jim really like strawberries? c) Are strawberries always red? d) Will strawberries be available in the market? 7. Your tire blew out on the way coming to this exam. What would your hypothesis for the cause of the blowout be? a) A nail pricked into the tire b) The weather was bad c) Your dog chewed on the tire d) Tires are made to blow out 8. A scientist testing the affects of a chemical on apple yield sprays an orchard with the chemical. A second orchard does not receive the chemical. In the fall, the number of apples harvested from each forest is counted. Which of the following is the independent (manipulated) variable in the experiment? a) chemical b) Number of apples c) First orchard d) Second orchard 9. Sitting in class sweating profusely, you notice that the door seems to be closed every time you perspire in class. This is most closely…

The table below is from the lethal effects of heat for E. coli. What is the TDP for this organism? (Please include the unit.)

how did you get 104 as the dilution factor? I got 10-2 as the dilution factor for the CNFL plate