What is gel transition sol?
The sol-gel transition (also known as gelation) is simply a change from a liquid state to a gel state. In the liquid state, components dispersed in the liquid are relatively free to move about. In the gel state, these subunits bond together to form a network extending throughout the whole substance (see figure 1).
What is a sol or a gel?
Sol vs Gel Sol, Gel and Emulsion are the different states of colloidal solutions. Sol: The liquid state of a colloidal solution is called the sol. Gel: The solid or semi-solid (Jelly like) stage of a colloidal solution is called the gel.
When the gel form can change into sol form called?
The reaction is called hydrolysis, because a hydroxyl ion becomes attached to the silicon atom as follows: Si(OR)4 + H2O → HO−Si(OR)3 + R−OH. Depending on the amount of water and catalyst present, hydrolysis may proceed to completion to silica: Si(OR)4 + 2 H2O → SiO2 + 4 R−OH.
What is sol-gel theory in amoeba?
Sol-Gel Theory or Change of Viscosity Theory: It is supposed to be the best to explain the locomotion in Amoeba. This theory is based on the reversible change of protoplasm from sol to gel state. This theory was proposed by Hyman (1917) and strongly supported by Pantin (1923-26), Mast (1925-31) and others.
What is example of sol?
A sol is a colloid made out of solid particles in a continuous liquid medium. Sols are quite stable and show the Tyndall effect. Examples include blood, pigmented ink, cell fluids, paint, antacids and mud. Artificial sols may be prepared by dispersion or condensation.
Which one is example of gel?
Some of the examples of gels are curd, cheese, butter, etc. Emulsion: These are the type of colloidal solution in which both the dispersed phase and the dispersed medium are in their liquid state. Some of the examples of emulsion are milk, cold cream, oil in water, etc.
Which type of protozoan locomotion is explain by sol-gel theory?
This type of locomotion is also called as pseudopodial locomotion. Here locomotion is brought about by the pseudopodia. It is the characteristic of rhizopod protozoans like Amoeba proteus and Entamoeba histolytica….AMOEBOID MOVEMENT.
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What are the Locomotory organelles found in protozoa describe the sol-gel theory of amoeboid movement?
Amoeboid movement is achieved by pseudopodia and involves the flow of cytoplasm as extensions of the organism. The process is visible under the light microscope as a movement of granules within the organism. The basic locomotory organelle is the pseudopodium.
What are the five kinds of gels?
Hydrophilic gels. Non-aqueous gels. Bioadhesive gels. Thermosensitive sol-gel reversible hydrogels.