A neighboring group claims to have achieved a 120% recovery after weighing their compound immediately after completing vacuum filtration. What could be the cause of this? What helpful advice might you share with this group to bring the recovery to 100%?
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A neighboring group claims to have achieved a 120% recovery after weighing their compound immediately after completing vacuum filtration. What could be the cause of this? What helpful advice might you share with this group to bring the recovery to 100%?
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- Using my chart can you help me answer this question? Why did we select distilled water to be the negative control?Calculate the amount of phycocyanin in Sample 1 in mg where A620=0.204 and A650=0.061, taking into account the dilution factor as per question 6, and the total volume of extract as per question 4. Note your answer to 2 decimal places Sample 1 Total Extract Volume (ml) is 45 Dilution factor is 100 A280 is 1.07 A620 is 0.221 A650 is 00.97 Specific Absorbance Ratio (SAR) A620/A280 is 0.206Which of the following is an important measure that may prevent bacterial contamination in tube feeding formulas? Question 71 options: a) Discarding opened containers of formula not used within 24 hours b) Adding formula to the feeding container before it empties completely c) Using the same feeding bag and tubing each day d) Adding the full days worth of formula to the bag at the start of each day
- With the action of detergents learned from this experiment, describe the potential harm to aquatic organisms of the practice of disposing large amounts of detergent into bodies of water.What statistical analysis should you use to determine LD50 of solutions of treated and un-treated effluent with 100, 50, 26, 13, 6, and 0 percentage dilution over a 1, 24, and 48 hour period? The species used for the lab is Daphnia magna. Can you use a paired t-Tes? CheersPlease explain Now that the laboratory scientist has a 1:10 dilution, what dilution should he make next to create a 1:100 dilution? Choose best letter answer and give a brief explanation. A. 1:2 B. 1:5 C. 1:10 D. 1:100
- Explain this example of the following water quality serial dilution. Note the dilution factors and how you would calculate #’s from the incubated plates. ……A serial dilution yielded TNTC in the 1:1 plate and the 1:10 plate, 50 cfu’s in the 1:100 plate and 3 cfu’s in the 1:1000 plate . What is the concentration (CFU)/ml of the raw sample? Is water acceptable for potable or Recreational use? Explain. When do you use filtration rather than serial dilutionCan you please interpret this blood gas and the solution to the problem. PH-7.46, PaCo2- 44.4, Pao2- 67, HCo3- 31.6In a tabulated form, list down the advantages and disadvantages of "each" preservatives used in a urine sample.
- Which of the following can most likely increase the yield of recrystallized benzoic acid? CHOICES: A fluted filter paper was used during cold filtration. The receiving flask from hot filtration does not contain a small amount of solvent. Activated charcoal was not added to the solution. The solution was filtered immediately after hot filtration.How do you use a student t-Test for a Daphnia magna lab to determine the LD50 of treated and non-treated effluent concentrations over a 1, 24, and 48 hour period? WordPlease explain in detail Question #1: A urine and culture should be performed on which type of sample? Question #2: Please explain the consequences of ketone in urine.