What is the sol-gel theory?
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.
Why sol-gel method is used?
The sol–gel approach is a cheap and low-temperature technique that allows the fine control of the product’s chemical composition. Even small quantities of dopants, such as organic dyes and rare-earth elements, can be introduced in the sol and end up uniformly dispersed in the final product.
What is sol-gel theory in amoeba?
Sol-gel theory The protoplasm of an amoeba is made up of an outer layer termed the ectoplasm which surrounds an inner portion called the endoplasm. The ectoplasm consists of a gelatinous semisolid called plasma gel whereas the endoplasm is made up of a less viscous fluid called plasma sol.
Why sol-gel is used?
In materials science, the sol–gel process is a method for producing solid materials from small molecules. The method is used for the fabrication of metal oxides, especially the oxides of silicon (Si) and titanium (Ti).
What is sol-gel theory in Amoeba?
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.
| Name of theory | Proposed by |
|---|---|
| Sol-gel theory | Hyman |
Which precursor is used in sol-gel process?
metal alkoxide
The sol-gel process is a more chemical method (wet chemical method) for the synthesis of various nanostructures, especially metal oxide nanoparticles. In this method, the molecular precursor (usually metal alkoxide) is dissolved in water or alcohol and converted to gel by heating and stirring by hydrolysis/alcoholysis.
Which type of Protozone locomotion is explain by sol-gel theory?
What is sol example?
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.