47. Tretinoin gel (RETIN-A MICRO) is avail-able in two strengths: 0.1% w/w and0.04% w/w. Which of these representsequivalent concentrations of the twostrengths?(a) 15 mg/15 g and 30 mg/30 g(b) 5 mg/5 g and 0.06 g/15 g(c) 15 mg/15 g and 60 mg/15 g(d) 30 mg/30 g and 6 mg/15 g47. (d) 30 mg/30 g and 6 mg/15 g

Answered: 47. Tretinoin gel (RETIN-A MICRO) is…

Phlebotomy Essentials

6th Edition

ISBN:9781451194524

Author:Ruth McCall, Cathee M. Tankersley MT(ASCP)

Publisher:Ruth McCall, Cathee M. Tankersley MT(ASCP)

Chapter1: Phlebotomy: Past And Present And The Healthcare Setting

Section: Chapter Questions

Problem 1SRQ

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0.03 The uv spectrum of a protein solution shows A280 nm = 0.43 and A260 nm = What is the approximate protein concentration in mg/mL?
2. A. If 100 mls of 0.03 M HCI is added to 400 mls of 0.5 M glycine buffer at pH 10.4, what is the resultant pH? (pK1 for Gly= 2.2, Pk2=9.4) Gly.4L X.5mol/L= .2 mol HCI.1LX.03mol/L = .003mol Glyº .02mol +.003 mol .023mol [HA] = .023/.5L =.046M, [A-] =.177/.5L = .354M pH = pka +log [A-]/[HA] pH = 9.4 +log.354/.046 = 10.3 [HCI] = [H+] = .003mol/.5L = .006M pH =2.2 Gly + H+ .18mol -.003mol .177mol end start B. What would the pH be if the same amount of HCl as in part A was added to 400 mls of water?
* Express the strength of a solution in the form of a fraction, a ratio, and a percent if 200 mL of the solution contain 50 mL of a drug. * Express the strength of a solution in the form of a fraction, a ratio, and a percent if 8 mL of the solution contain 3 g of a drug. * How many milliliters of a 0.5% solution contain 4 grams of a drug?
30. A patient weighing 77 kg should receive a dose of 1.23 g of daratumumab (DARZALEX) in treating multiple myeloma. The drug is available in a 20-mL vial containing 400 mg of daratumumab. How many milliliters of this solution should be administered to provide the recommended dose?
2 if there is a stock solution of 2000 (ug/ml) , is it possible to use SERIAL DILUTION to generate the following 8 tubes with their concentrations? A 2000 (ug/ml) B 1500 (ug/ml) C 1000 (ug/ml) D 750 (ug/ml) E 500 (ug/ml) F 250 (ug/ml) G 125 (ug/ml) H 0 (ug/ml)
Calculate the amount of phycocyanin in Sample 1 in mg where A620=0.192 and A650=0.090, taking into account the dilution factor (100), and the total volume of extract (45). Note your answer to 2 decimal places.
A patient presents to the emergency department in a critical condition. The patient’s blood was tested and the concentration of carbonic acid (H2CO3) was found to be 4.0×10-4 M and bicarbonate ion (HCO3-) 3.062×10-3 M. Ka = 4.3 × 10-7 H2CO3(aq) ⇌ HCO3-(aq) + H+(aq) Show all calculations including equation(s) used. Calculate the pH of the patients’ blood. Based on your answer would you say the patient is suffering from Acidosis or Alkalosis?
The image shows a whole body bone scan using MDP (mono-diphosphonate) labelled with technetium-99m. • Patient is injected with 600 MBq of Tc-99 MDP • Technetium-99m is a pure gamma emitter, with physical half life of 6 hours. a) Use the data to explain why technetium 99-m is a suitable radionuclide (AC 3.1)
50 g of dextrose is added to1 L of SWFI. What is the final concentration?
16. How many milliliters of a 0.9% (w/v) solution of sodium chloride can be pre- pared from 50 tablets, each containing 2.25 g of sodium chloride? 16. 12,500 mL
If equal portions of tretinoin gel, 0.1% w/w and 0.04% w/w are combined, what would be the resultant percentage strength?
Protein Solubility 3.5 5.5 5 5 0.068 0.028 Absorbance 0.098 Conc.(mg/ml) 0.195 0.130 0.044 0.9% 2.786% 9.429% 11.3: % solubility 4.179% The above table indicates the concentration of protein in the diluted supernatant and the supernatant before dilution at different pH. Dilution Factor 30 22.5 15 PH 7.5 1.5 4.5 5 0.027 3 0.042 Protein Solubility Versus pH 6.5 6 4.5 pH Value The above figure shows a plot of protein solubility versus pH. 50 7.5 7.5 50 0.032 0.053 8.5 50 0.054 0.100 21.429% 9 Please provide a brief discussion and explanation of the results. (using isoelectric point and net charge to explain)

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