FINAL 06 - Gels (Aluminum Hydroxide Gel) Flashcards
A suspension in a water medium of insoluble drugs in hydrated form
Gel
An aqueous suspension of insoluble, inorganic drugs; differs from gels mainly in that the suspended particles are larger
Magmas
A class of gels in which the structural coherent matrix contains a high proportion of liquid, usually water
Jellies
Taking up of a certain amount of liquid without increase in volume
Imbibition
Taking up of a liquid by a gel with an increase in volume
Swelling
The dispersing medium is squeezed out in droplets and the gel shrinks
Syneresis
A reversible gel-sol formation with no change in volume/temperature
Thixotrophy
Gels may contain a preservative in a total amount of not exceeding __________
0.5%
The liquid is removed from a gel and only the framework remains
Xerogel
Gels that have two phase systems; examples include aluminum hydroxide gel and bentonite magma (Classifications of gels)
Inorganic hydrogels
Gels that have single phase systems; usually includes carbomer, tragacanth, and Plastibase (Classification of gels)
Organic gels
Has ingredients that are dispersible as colloidals or soluble in water (Types of gels)
Hydrogels
Has hydrocarbons, animal and vegetable fats, and soap base greases (Types of gels)
Organogels
A combination of mineral oils and heavy hydrocarbon waxes with a molecular weight of about 1300
Jelene/Plastibase
Jelene/Plastibase is a combination of mineral oils and heavy hydrocarbon waxes with a molecular weight of about __________
1300
