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- mead. Post Lab #2 Smear & Stain Preparation Name: Leidiawa MontaNo Date: 1. Why are thick or dense smears less likely to provide a good smear preparation for microscopic evaluation? Please explain. Becapse, it will diminish the amount ds latcan Pass through by mam 1t difficult to See under the micioscol e, s less liket to Prowde a go image. 2. What could potentially happen if you leave the slide exposed for too long to the open flame? Why do you have to be careful? we can form ring Patterns if we expose the slide for ta0 the flame 3. During the preparation of a smear leading into simple staining of the bacterial culture S. epidermidis you forgot to heat fix the slide. What would you see on this slide as compared to a slide that was properly prepared? Please explain. 4. You partner stained bacterial cells and saw only the background and not the actual cell was stained. Your partner thought this was a mistake. Please explain what type of staining method this is, how it works and why the…Z40 7 @ ۱۲:۶۲ لا يوجد SIM و السؤال Roller compactor and chilsonators are used in preparation of granules of aspirin. false true حفظ الإجابةA urine sample is diluted 1:1,000. If 0.1 ml were put into a Petri dish with melted agar, how many CFU/ml are in the urine if 158 colonies grow?
- DILUTION COLONY COUNT CFU/mL 1:106 155000 1:107 15500 1:108 1550 1:109 155 Given these values how would I fill in the rest of this serial dilution table? Also, what would be a 1:1 CFU/mL value based on this table?What are the advantages of granulation ? during tablet formulation. DefineA) Draw and label the set-up of Manual paraffin wax infiltration. B) Answer the following questions:1. Differentiate the 3 types of tissue Impregnation in terms of: 2. Impregnation Techniques Advantages Disadvantages A. Paraffin Infiltration B.Celloidin Infiltration C.Gelatin Impregnation C) What is the required volume of embedding medium for routine tissue processing? D) What is Plastic embedding? What is Double embedding?
- 8. A. Use Excel (or another graphing program) to draw the growth curve, In (X/X.) vs time, for bacteria grown in a 20 L suspension cell culture, given the following data: - initial concentration: 0.120 gdw cells/L Also report: - lag time: 1.5 hours - mass doubling time during exponential growth: 250 minutes - duration of exponential growth phase: 1 day (24 hours) - negligible time in the deceleration phase - 13 hours in the endogenous metabolism phase with no change in cell concentration - cell death rate with k = 0.0178 min -¹. B. What is the specific growth rate, µ? C. What is the maximum concentration of cells in the reactor? (gdw cells/L) and when does this occur? D. Other than time zero or the end of lag phase, at what time is the concentration of living cells in the reactor equal to the initial concentration of 0.120 gdw/L?Determine what percentage of the culture was living (viable) and what percentage was dead (mortality). Plates Plate Dilution Volume plated No.of colonies Avg No Concentration of diluted sample Cd(cells/mL) Concentration of original sample Cu(cells/mL) 1 10^-3 10ul R1=130,R2= 110,R3=210 150 150mL 1.50*10^6 Volume of cells(mL) Volume of diluent(mL) Total dilution(D) Hemocytometer count Avg cells in 1 mm^2 area Concentration of diluted sample Cd(cells/mL) Concentration of original sample Cu(cells/mL) 4.3 0.5 0.1 grid 1= 171 , grid2 = 185 178 1.78*10^5 1.78*10^6blackboardcdn.com/5bfc08ba3fldc/14683296?X-Blackboard-Expiration=16245468000008X-Blackboard- 19 / 47 100% 1.4. Functions of the light mlcroscope parts Complete the following table by writing the function(s) of each of the parts indicated. Structure Function Diaphragm / iris Stage opehing Lamp Objective lenses Eye piece Coarse and find adjustment knobs Stage Stage rack prt sc delete home backspace lock enter pause t shift
- Look at the table below and answer the following questions: Culture 1/10 1/50 1/100 1/200 dilution OD Reading 1 2.0 0.36 0.18 0.11 OD Reading 2 1.9 0.35 0.18 0.08 OD Reading 3 1.8 0.33 0.16 0.09 1. Which 2 dilution levels of the culture are the best to use to compute for its optical density? 2. What is the average optical density of the culture? (use values from 2 dilution levels)1mL Stock #1 1mL 2000060 9mL #2 9mL wwwww #3 4. 1mL 0000000 A 9mL wooooo #4 0.1m/L O 1mL 5000000 B 9mL #5 1mL 1mL 9mL wwwwww #6 0.1mL 1mk O. D Using the picture serial dilution scheme and the following information (plate A has 276 colonies, plate B has 298, plate C has 2, and plate D has 30), calculate the average number of colony forming units per mL in the stock tube. Make sure to only use countable plates. Round your answer to the nearest one. Write only the number with any needed commas or decimals. Do not include units.How would you make two-fold serial dilutions such that the last tube is a 1:32 dilution of the original, concentrated material? Assume that you need to have at least 500 µl of each dilution, and you should be able to perform the dilutions in microfuge tubes with a maximum capacity of 1.5 ml.