Suspensions
Monday, November 1, 2010
Method of Flocculated suspensions:
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There are three general methods of producing colloidally stable dispersions: Adsorption of a smaller hydrophilic and lypophilic colloid on l...
Flocculated suspensions:
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Flocculation: It refers to the formation of a loose aggregation of discrete particles held together in a net-work like structure either by ...
Structured vehicle:
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The vehicle is said to behave like a “false body” which is able to maintain the suspended particle in a state of more or less permanent susp...
Bingham-type plastic flow:
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Vehicles that exhibit the unusual property of Bingham-type plastic rheological flow are distinguished by the need to overcome a finite yield...
Thixotropic flow:
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Thixotropic flow is defined as a reversible, time dependent, isothermal gel-sol transition. Thixotropic systems exhibit easy flow at relativ...
Formulation of suspensions:
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During the preparation of physically stable pharmaceutical suspensions, a number of formulation components are employed to help keep the sol...
Wetting agents:
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The degree of wettability depends on the affinity of drugs for water and whether the solids are hydrophilic of hydrophobic. Hydrophilic soli...
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