why is there a need to maintain a hot temperature in separating the supernatant liquid containing the Lead Ions and the residue containing the Silver and Mercurious Ions?
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why is there a need to maintain a hot temperature in separating the supernatant liquid containing the Lead Ions and the residue containing the Silver and Mercurious Ions?
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- A vial of Doxorubicin reads 0•5g per vial. Instructions say to reconstitute each 12mg with 2•5ml of NS. How many ml of NS will be needed to reconstitute the vial of the recommended concentration? please show workingTo analyze a sample by mass spectrometry, the sample must consist of gas phase ions. a) Explain why it is difficult to make gas phase ions of proteins. b) Generally explain how electrospray ionization turns proteins in solution into gas phase ions.a) A bottle is labeled Demerol (meperidine) 50 mg/cc. How many cubic centimeters are needed to give a 125 mg dose? b) Promazine HCL comes as 500 mg/10 ml. How many milliliters are needed to give 150 mg dose? c) Hyaluronidase comes as 150 U/cc. How many cubic centimeters for a 30 U dose?
- What is the concentration of a 50% solution after completing three 1:10 serial dilutions?I am trying to figure out how much albumin and globulin are in our egg white sample. The egg white is 38.51g. It was diluted with 200 mL of water, and I was told to find the dilution factor. We were told that 38.5g is equal to 1mL of water. The dilution factor I calculated was 38.51mL (egg white)/238.51mL (total volume)= 1:6 dilution factor. We then took 40mL of the diluted sample and centrifuged it to separate the albumin and globulin. Using a given standard curve, we calculated the concentrations of albumin and globulin for each tube with different amounts of each protein. There were other solutions added to each tube for the spectrophotometer, but each one had a total volume of 5mL including the albumin and globulin. To find mg protein in the tube, do I multiply the concentration by the total volume in the tube or by the mL of protein added to each tube? To calculate the amount of each protein in the egg white, I multiplied each concentration in the table by the dilution factor,…4 mL of 10% TCA solution was added to 1 mL of serum and after mixing, it was waited for two minutes and filtered through non-phosphorus filter paper. 1 mL of the filtrate was taken and 13 mL of distilled water, 4 mL of sulfomolybdic acid and 2 mL of dilute SnCl2 solution were added and mixed, and after waiting for 15 minutes, the absorbances of the obtained solutions against pure water at 520 nm were read. If the function of the calibration graph obtained with 0.5-2.5 mg/mL standard phosphorus solutions is y= 0.245x + 0.107 and the absorbance value of the serum sample is 0.109, what is the amount of phosphorus in the sample?
- You have a 1000X stock solution of sodium chloride (NaCl). The concentration of NaCl in the stock solution is 5M. a)How would you make 300mL of a 1X solution? b)What is the concentration of NaCl in your 1X solution?In making red blood cell suspension, why do we need to wash red blood cells in saline?How will you know when the endpoint of the titration is reached? Why is it necessary to mix the solution after you add base?. Single line text.
- Which of the following statements is TRUE about the band of molecules labeled X ( close to where it says positive electrode). ( NOTE: previous answer said that a,b, and d are true; nevertheless I can choose only one). Need help. A) it contains DNA fragments that are shorter than the ones in any of the other bands. B) it contains fewer DNA molecules than any of the other bands from lane 3. C) it contains more negatively charged particles than any other band on the gel. D) it contains fewer genes than any of the other bands on the gel. Which of the following is true of the gel electrophoresis shown? Note: Only one can be true... I'm still between c or d. Need help A) the power source has not been turned on yet. B) the three wells contained the same DNA molecules. C) well #1 had fewer molecules of DNA than well #2 or #3 D) well #3 had more different sized molecules of DNA than well #1 or #2After blood collection, the red cells are separated from the serum to be used for the preparation of the stock solution. How is it done? For the serial dilution, your stock solution must have a concentration of 3.5 mg/mL. How much diluent must be added to the 5.3 mg/mL red cell to prepare the stock solution? Show pertinent solution/s. What is the appropriate diluent used for the preparation of the red cell suspension?You have an order for 1 gram of Cefazolin in D5W 100 ml. You have added 5 ml of sterile water to the 1 gram vial to reconstitute powder. However the recommended manufacturer’s diluent amount is 10 ml of sterile water for a final concentration of 100 mg/ml. How would reconstituting the vial with 5 mls affect the concentration and the final calculated dose?
