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

How are antivenoms produced, How are antivenoms produced? Why are antivenom...

How are antivenoms produced? Why are antivenoms an example of passive immunization? Antivenoms are getting by the following process: the venom (antigen) is inoculated into othe

Symptoms of constipation, Q. show the Symptoms of constipation? Have yo...

Q. show the Symptoms of constipation? Have you ever suffered from constipation? Do you recall the symptoms associated with the problem? Yes, the symptoms were specific to havin

Phospholipids exhibit important biological functions, Phospholipids exhibi...

Phospholipids exhibit  important biological functions. They are: a)  increase  the rate of fatty acid oxidation b)  act as inorganic ion carrier across the membrane c) hel

Portal circulation, POR T AL CIRCULATION When a vein branches into se...

POR T AL CIRCULATION When a vein branches into set of capillary to distribute blood in some parts, such venous circulation is called portal system. Three types of portal syst

Erythrocytes or red blood cells, Erythrocytes or red blood cells: Th...

Erythrocytes or red blood cells: These are otherwise called Red Blood cells or corpuscles. These are the most numerous cells in the blood.There are about 4.5 to 5.5x 10 9

Difference between living and non-living beings, DIFFERENCE BETWEEN LIVING ...

DIFFERENCE BETWEEN LIVING AND NON-LIVING BEINGS - S .No. C h a ra cte r L i v i n g be ings N o n - l i v i n g be

A decrease in parasympathetic discharge to the heart, A decrease in parasym...

A decrease in parasympathetic discharge to the heart leads to A. a decrease in the conductance of F-channels in SA node cells. B. an increase in the conductance of potassium

Show the process of healing abutment, Q. Show the process of Healing abutme...

Q. Show the process of Healing abutment? Healing abutments are therefore not considered ideal. It is for this reason that the definitive abutment, selected at first stage surge

Lab report, Why making a smoke print of a leaf

Why making a smoke print of a leaf

Define food availability and food access, Define Food availability and Food...

Define Food availability and Food Access? Food availability: This refers to availability of necessary types of food in sufficient quantity, to the individual. The sources may b

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