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ALPHABETICAL DIET

 ALPHABETICAL DIET Alphabetical diet is one in which one's take one letter diet for 26 days regularly. It starts from A and end in Z. It is basically a cooking and eating challenge and allows a variety of diet in every day life. It is not a weight loss plan. Here we discuss food and drinks available in Pakistan. LETTER 'A' APPLES Pakistan is the 10th largest apple producing country globally. The popular varities included Granny Smith, Golden Delicious, KallaKaku, Pink Lady and Red Delicious. Apples contain pectin, a natural fibre found in plants.It has a cholesterol lowering effect. Apples are low on the glycaemic index (GI) prevents diabetes. Apples are rich in polyphenols ' querctin' lower risk of hearth diseases and respiratory problems.  APRICOTS The apricot's native region is Central Asia. It is a fruit with a firm exterior and a soft interior that is smaller than a peach but looks remarkably similar. Apricots are a great food for supporting eye health sinc...
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INTRODUCTION TO CHROMATOGRAPHY

 CHROMATOGRAPHY

DEFINITION

Chromatography is derived from two Greek words, Chroma means "color" and Graphein means "to write".

"Chromatography is a physical method of separation in which components to be separated  are distributed in two phases, one is mobile and other is stationary phase".

PRINCIPLE OF CHROMATOGRAPHY 

Chromatography is a physical and dynamic process in which mobile phase moves in a definite direction.

COMPONENTS OF CHROMATOGRAPHY

Chromatography is based on three components:

STATIONARY PHASE

  • Liquid or solid phase.
  • Coated on the surface of solid phase.

MOBILE PHASE

  • Flow over the stationary phase.
  • Mobile phase is liquid called Liquid Chromatography.
  • Mobile phase is gas called Gas Chromatography.

SEPRATED MOLECULES

  • Interaction between stationary, mobile and substances contained in a mixture is a basic component effect on separation molecules from each other.

FACTORS AFFECTING CHROMATOGRAPHY

  1. Molecular characteristics, related to adsorption(liquid-solid).
  2. Partition(liquid-solid)
  3. Affinity or differences among their molecular weight.
Because of these differences, some components stay longer in the stationary phase and move slowly in chromatography system, while other move rapidly from the mobile phase, leaves system faster.

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