Release of drug from a 20mm gel cube (B) was tested by placing it in a large dissolution apparatus containing a buffered solution into which the drug (A) was extracted. 4 of the sides are sealed, while 2 opposite sides are not. If Xp = 0.4, and DAB = 1.8 x 106 cm/s, what is t (hr)?
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- What is the minimum volume of dissolution media required to provide sink condition in dissolution test of a tablet dosage form (its weight: 1350 mg; dose strength: 1000 mg) regarding the following conditions? The molecular weight of an active drug substance is 500 Da; the dissolution media is water and the solubility of active drug substance in water is 10 mg/Ml (4. SLAYT) 500 ml 1000 ml 1350 ml 100 ml 135 mlA 2.5mg/ml solution of ampicillin is available for use, what volume would youadd to 200ml of LB medium to obtain a final concentration of 50µg/ml ofampicillin?After three minutes, the concentration of drug Zip in the red blood cells is 10 mmoles l-1. What is the average rate of entry of drug Zip into the red blood cells in units of moles min-1 red blood cell-1 during the first three minutes after placing the red blood cells into the bathing solution? Assume that each red blood cell occupies about 1 x 10-13 liters.
- Calculate the elution volume of blue dextran (blue), myoglobin (red), and Bromocresol purple (purple) in the gel filtration chromatography below with a flow rate of 2.5 mL/min. (Take note that the black colored test tubes represent colorless eluents)a)Determine the amount of X (in gram) in order to prepare 100 mL of 50 mM stock solution of X. Show your work. (MW of X= 225) b)Determine the volume required (mL) from the stock solution X in (i) to prepare 500 mL of MS medium containing 5 mg/L X. Show your work.The standard curve to determine the amount of betacyanin is shown below. You extracted a red pigment from a beet disc (the mass of a disc is 2 g) using 10 ml of 20% ethanol solution. You measured absorbance of the solution above the beet disc every minute for a total time of 20 minutes. The increase in absorbance was linear during a period of time from 1 min to 10 min. The absorbance at 10 min was 0.8. Calculate the amount of betacyanin extracted from 1g of a beet tissue per minute. Explain your calculations. You can use Excel or a calculator.
- If 400 mL of a 20% w/v solution were diluted to 2 L, what would be the finalpercentage strength?A vial containing 400 mg hydrocortisone sodium succinate powder for injection is to be reconstituted to produce 8 mL of injection. What is the amount of Water for Injections, BP that should be added to the powder? The displacement volume of hydrocortisone sodium succinate is 0.05 mL/100 mg.The reults for the macroscopic part: 0.30M glycerin – solution was translucent (could see text behind the test tube) 0.15M NaCl – solution was opaque (could not see text behind the test tube) 0.30M NaCl – solution was opaque (could not see text behind the test tube) 0.15M glucose – solution was translucent (could see text behind the test tube) 0.30M glucose – solution was opaque (could not see text behind the test tube) 0.30M Urea – solution was translucent (could see text behind the test tube) Results for microscopic part: 0.30M glycerin – no cells present 0.15M NaCl – normal sized cells 0.30M NaCl – crenated (shrunken and star-shaped) cells 0.15M glucose – no cells present 0.30M glucose – normal sized cells 0.30M Urea – no cells present Determine the osmolarity (hypoosmotic, isosmotic, or hyperosmotic) and tonicity (hypotonic, isotonic, hypertonic) of the following solutions.In which solutions did the osmolarity NOT match the tonicity? For those solutions, why did the osmolarity…
- Prepare one dose of 0.6 mg kanamycin in 2mL diluted from a stock solution of 20 mg/ml. How much kanamycin and how much diluent are used?A 5% dextrose in 1/2 normal saline (D5 1/2 NS) solution is commonly administered to patients needing post-operative IV fluids. How could you prepare 500 mL of this solution? Dextrose is 5% (m/v) and the NaCl is 0.45% (m/v).The doctor ordered Oxacillin 650mg every 6 hours. The instructions on the 2gm vial states to reconstitute with powder with 11.5ml of sterile water for injection, yielding 220mg/1.5ml. How many ml will you administer? using dimensional analysis and show work