User:Nader A. Khamis/Notebook/Experimental Biological Chemistry AU Fall 2011/2011/09/01: Difference between revisions

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==Description==
==Description==
# Approximately 9 mL of ethanol and 1 mL of distilled H<sub>2</sub>O were placed in a 10 mL graduated cylinder to prepare  a 90% ethanol solution.
# Approximately 1g of Zein was placed into an erlenmeyer flask.
#Approximately 240μl of glycerol was carefully inserted into the erlenmeyer flask.
#Approximately 8.7 mL of ethanol was pipetted into the erlenmayer flask and the mixture was mixed using a stir bar.
# 5g of the mixture was transfered to a 9cm diameter Petri dish.
# The cover of the petri dish was removed and the petri dish was placed into the oven for 24hours. The oven temperature was 40°C.


==Data==
==Data==

Revision as of 13:35, 9 December 2011

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Objective

Description

Data

  • A solution of Zein (10% w/v) along with Ethanol (90%v/v) and Glycerol (30% on Zein weight basis) was prepared by using the following procedure.
  • Approximately 9 mL Ethanol and 1 mL distilled water were added to a 10 mL graduated cylinder.
 Calculation: (9ml/10ml)*100%= 90% v/v Ethanol
  • To prepare 10%w/v Zein: 0.1 = x grams of zein / 10ml of solution
                          x= 1g of Zein.
  • To prepare Glycerol (30% on Zein weight basis): 0.3*(1g of Zein)= 0.3g of Glycerol
  • The density of Glycerol equals 0.261g/cm3.
  • 1.261g/ml=0.3g/x ml of Glycerol.
x = 0.24ml of Glycerol

Notes

This area is for any observations or conclusions that you would like to note.


Use categories like tags. Change the "Course" category to the one corresponding to your course. The "Miscellaneous" tag can be used for particular experiments, as instructed by your professor. Please be sure to change or delete this tag as required so that the categories remain well organized.



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