EXP 15 : Liquid petroleum emulsion 1.0

37問 • 2年前

問題一覧

A dispersed system containing at least two immiscible liquid phases

Emulsion.

The majority of conventional emulsions in pharmaceutical use have dispersed particles ranging in diameter from 0.1 to 100 um

Emulsion.

Oils, petroleum hydrocarbons, and / or waxes are the dispersed phase, and water or an aqueous solution is the continuous phase

O/W emulsion.

Water is dispersed as droplets in an oil or oleaginous medium

W/O emulsion.

Used for external preparations when emollient, lubricating, or protective properties are desired

W/O emulsion.

Appear as translucent or transparent and have droplet diameter in the nanometer range

Microemulsion.

What are the theories of emulsification.

Surface tension theory, Oriented-wedge theory and Interfacial film theory.

Substances derived either form animal or plant sources

Natural emulsifying agent.

What are the examples of natural emulsifying agent?

Gelatin, eggyolk, starch, acacia and alginate.

Employed primarily as thickening agents and stabilizers for o/w emulsions of certain lotions and ointments used externally.

High molecular weight alcohol.

What are the example of high molecular weight alcohol

Glyceryl monostearate.

Substances adsorbed in the water interface to form a coherent film.

Finely divided solid.

What are the examples of finely divided solids.

Veegum, aluminum hydroxide, bentonite, magnesium hydroxide and magnesium trisilicate.

AKA “Surface-active agents” Contain both the lipophilic & hydrophilic groups

Synthetic emulsifying ageant.

What are the types of synthetic emulsifying ageant.

Anionic, cationic and non-ionic.

The type of emulsion formed is based on the Hydrophilic Lipophilic Balance (HLB). The HLB system is associated with the logical means of selecting emulsifying agents based on balance between the hydrophilic and lipophilic portions of an emulsifying agent (True/False)

True.

These are organic salts, which are ionized in the presence of water

Anionic agents.

They are widely used in external preparations as o/w emulsifying agents

Anionic agents.

What is the example of anionic.

Sodium lauryl sulfate.

These are quaternary ammonium compounds, which are inactivated by the presence of soaps.

Cationic surfactant.

Emulsions which used this type are generally stable at acidic pH

Cationic surfactant.

What is the example of cationic surfactant.

Benzalkonium chloride.

These are the polysorbates and sorbitan series which tend to be of low order toxicity, nonirritating, tasteless and chemically stable and are compatible with ionic, anionic and nonionic drugs or adjuvant

Non-ionic surfactant.

What are the examples of non-ionic surfactant

Spans and tweens.

indicate hydrophilic moleculesand will produce o/w type of emulsion

8-18.

indicates lipophilic molecules and will produce w/o emulsions

3-6.

Gelatin.

Natural emulsifying agent.

Eggyolk.

Natural emulsifying agent.

Starch

Natural emulsifying agent.

Acacia

Natural emulsifying agent.

Alginates

Natural emulsifying agent.

Glyceryl monostearate.

High molecular weight alcohol.

Veegum

Finely divided solid.

Aluminum hydroxide

Finely divided solid.

Bentonite

Finely divided solid.

Magnesium hydroxide

Finely divided solid.

Magnesium trisilicate

Finely divided solid.

Cell structure.

Quinn Karylle Fuentes · 28問 · 2年前

Cell structure.