Which separation technique do you think will be the fastest, flash chromatography or chromatotron? Explain. What separation method is most applicable to supercritical-fluid chromatography? Explain why the center of the band is used to calculate the Rf ...
Explain why the center of the band is used to calculate the Rf value for a cation rather than the leading edge of the band in chromotagraphy. Explain how enzymes are specific for their substrates (stereospecific and geometric specificity). ...
How would you go about extracting caffeine from coffee? Caffeine: Caffeine is a stimulant substance that occurs naturally and is commonly found in tea, coffee, and cocoa plants. Depending upon the coffee bean used, a cup of coffee can contain between 80 to 170 mg of caffeine. ...
Let us, however, underline that experimentally it is more difficult to determine the amount of waste in a process (required to calculate E factor) than the amount of entering materials (required to calculate PMI). 5. The EcoScale When a more exhaustive determination of the greenness of a ...