List various advantages of HPLC

With the help of suitable diagrams, explain different stages of the elution process in column chromatography. 

Discuss the experimental aspects of DNA Gel electrophoresis including instruments and reagents used. 

Give a schematic representation and a list of various components of HPLC instrument.

Briefly explain the following:

i) Reverse Osmosis

ii) Nanofiltration

iii) Ultrafiltration

iv) Microfiltration

v) Dialysis

How does the moisture content and particle size affect the rasin properties? 

What is HPLC? Give its characteristic features and advantages.