Define descending type of paper chromatography, Biology

Assignment Help:

Define Descending type of paper chromatography?

In descending chromatography, the movement or flow of mobile phase is in downward direction. In this technique the solvent is kept in a trough at the top of chamber and then allowed to flow down the paper. The movement of the liquid is caused by capillary action, as well as, by gravitational pull.

The rate of flow of mobile phase is more rapid in this case as compared to that in ascending development. The basic material of the paper use for chromatography is a cellulose of high purity, which is present in 98.99 %. This paper is composed of randomly directed cellulose fibers. The cellulose itself is a network of long chains of carbohydrate with molecular weight of more than 1,00,000 possessing hydrophilic.


Related Discussions:- Define descending type of paper chromatography

Standardization of hcl for saponification number of fats, Define Procedure ...

Define Procedure for Standardization of HCl for Saponification Number of Fats? Precisely weigh 2.65 g of anhydrous sodium carbonate and transfer it to 100 ml volumetric flask.

What is the main moral problem about the cloning, What is the main moral pr...

What is the main moral problem about the cloning of human individuals? Besides biological perils, a very serious moral problem includes the nucleus transplantation technology c

Body fluids of marine teleost, Body Fluids of Marine Teleost The body ...

Body Fluids of Marine Teleost The body fluids of marine teleost are hypotonic to seawater, so these fishes lose water to the environment especially across the gill epithelium.

Aerobic cellular respiration during muscle exercise, Q. What happens when t...

Q. What happens when the oxygen supply is inadequate to maintain aerobic cellular respiration during muscle exercise? If oxygen from myoglobin or hemoglobin is not enough for t

Explain cigrates smoking from lifestyle risk factors, Explain cigrates smok...

Explain cigrates smoking from lifestyle risk factors ? Smoking is the single most important preventable risk factor for CAD. There is strong evidence that smoking can significa

Patent ductus arteriosus , Patent Ductus Arteriosus  (PDA)   PDA is one...

Patent Ductus Arteriosus  (PDA)   PDA is one of  the most common cardiac anomalies. It occurs twice as frequently in girls as in boys.  In patent ductus Arteriosus there is

Perception of light - floral induction, Perception of Light - Floral Induct...

Perception of Light - Floral Induction Stimulus Leaves are found to be organs that perceive light 'stimulus', K.C. Hamner and J. Bonner showed in 1938 that even if all the lea

What are the types of leukocytes, What are the types of leukocytes and how ...

What are the types of leukocytes and how are they classified into granulocytes and agranulocytes? The types of leukocytes are monocytes, lymphocytes, neutrophils, eosinophils

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd