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Questions and Answers
What is the fraction of Tween 80 used in the emulsion formulation?
What is the fraction of Tween 80 used in the emulsion formulation?
- 0.25
- 0.75
- 0.42
- 0.58 (correct)
What is the fraction of Span 80 used in the emulsion formulation?
What is the fraction of Span 80 used in the emulsion formulation?
- 0.58
- 0.25
- 0.75
- 0.42 (correct)
How much Sorbitan monooleate is required for the emulsion formulation?
How much Sorbitan monooleate is required for the emulsion formulation?
- 50 g
- 2.1 g (correct)
- 2.9 g
- 5 g
How much Polyoxyethylene 20 sorbitan monoleate is required for the emulsion formulation?
How much Polyoxyethylene 20 sorbitan monoleate is required for the emulsion formulation?
What is the purpose of heating the oil-soluble sorbitan monooleate to 75°?
What is the purpose of heating the oil-soluble sorbitan monooleate to 75°?
Why is the water-soluble polyoxyethylene 20 sorbitan monooleate added to the aqueous phase at 70°?
Why is the water-soluble polyoxyethylene 20 sorbitan monooleate added to the aqueous phase at 70°?
What does the formulator mean by not being restricted to using only the mentioned emulsifying agents?
What does the formulator mean by not being restricted to using only the mentioned emulsifying agents?
Why are various methods employed for emulsion preparation?
Why are various methods employed for emulsion preparation?
What is the primary indication for Castor Oil Emulsion?
What is the primary indication for Castor Oil Emulsion?
Which type of emulsion are many hand and body lotions for dry skin?
Which type of emulsion are many hand and body lotions for dry skin?
What are liniments intended for?
What are liniments intended for?
What does Simethicone Emulsion act as?
What does Simethicone Emulsion act as?
What is the emulsifying agent formed from the combination of olive oil and calcium?
What is the emulsifying agent formed from the combination of olive oil and calcium?
What equipment is used on a larger scale for emulsion formation?
What equipment is used on a larger scale for emulsion formation?
Which process refers to the aggregation or joining of droplets without any change in primary droplet size?
Which process refers to the aggregation or joining of droplets without any change in primary droplet size?
What contributes to the tendency of aggregates of globules to rise to the top or fall to the bottom of an emulsion?
What contributes to the tendency of aggregates of globules to rise to the top or fall to the bottom of an emulsion?
What is the primary purpose of pharmaceutical emulsions?
What is the primary purpose of pharmaceutical emulsions?
Which factor plays a significant role in affecting the stability of emulsions?
Which factor plays a significant role in affecting the stability of emulsions?
What distinguishes microemulsions from macroemulsions?
What distinguishes microemulsions from macroemulsions?
What is the primary function of emulsifying agents in pharmaceutical emulsions?
What is the primary function of emulsifying agents in pharmaceutical emulsions?
What is the ratio of surfactant A to surfactant B to achieve a total HLB value of 9.0?
What is the ratio of surfactant A to surfactant B to achieve a total HLB value of 9.0?
How is the total HLB value of a mixture of surfactants calculated?
How is the total HLB value of a mixture of surfactants calculated?
Why may combining two or more emulsifiers be necessary to achieve the required HLB value?
Why may combining two or more emulsifiers be necessary to achieve the required HLB value?
What is assumed to be an algebraic summation of the HLB for a mixture of surfactants?
What is assumed to be an algebraic summation of the HLB for a mixture of surfactants?
What is the crucial step to consider prior to emulsion preparation?
What is the crucial step to consider prior to emulsion preparation?
Why is it important to warm the aqueous phase 2-3°C above the oil phase?
Why is it important to warm the aqueous phase 2-3°C above the oil phase?
Why should alcohol or solutions containing alcohol not be added directly to the primary emulsion?
Why should alcohol or solutions containing alcohol not be added directly to the primary emulsion?
When should substances that might interfere with the stability of the emulsion be added?
When should substances that might interfere with the stability of the emulsion be added?
Why is the Forbes bottle method not suitable for viscous oils?
Why is the Forbes bottle method not suitable for viscous oils?
What is the purpose of passing an emulsion through a hand homogenizer?
What is the purpose of passing an emulsion through a hand homogenizer?
What type of soaps are developed by the In Situ Soap Method?
What type of soaps are developed by the In Situ Soap Method?
Why are viscous oils not suitable for the Forbes bottle method?
Why are viscous oils not suitable for the Forbes bottle method?
In emulsion terminology, what is the dispersed phase also known as?
In emulsion terminology, what is the dispersed phase also known as?
What is the primary role of an emulsifying agent in preparing a stable emulsion?
What is the primary role of an emulsifying agent in preparing a stable emulsion?
Which type of emulsion can be diluted or extended with water or an aqueous preparation?
Which type of emulsion can be diluted or extended with water or an aqueous preparation?
What distinguishes multiple emulsions from macroemulsions?
What distinguishes multiple emulsions from macroemulsions?
Why is the dry gum method generally employed when the intended dispersed phase is a mixture of fixed oil and volatile oil?
Why is the dry gum method generally employed when the intended dispersed phase is a mixture of fixed oil and volatile oil?
What is the primary reason for passing an emulsion through a hand homogenizer?
What is the primary reason for passing an emulsion through a hand homogenizer?
What are the two types of soaps developed by the In Situ Soap Method?
What are the two types of soaps developed by the In Situ Soap Method?
Why is the Forbes bottle method not suited for viscous oils?
Why is the Forbes bottle method not suited for viscous oils?
What is the fraction of Polyoxyethylene 20 sorbitan monoleate required for the emulsion formulation?
What is the fraction of Polyoxyethylene 20 sorbitan monoleate required for the emulsion formulation?
What is the total HLB value of the mixture of Tween 80 and Span 80 used to produce a physically stable liquid paraffin emulsion?
What is the total HLB value of the mixture of Tween 80 and Span 80 used to produce a physically stable liquid paraffin emulsion?
Why might combining two or more emulsifiers be necessary to achieve the required HLB value?
Why might combining two or more emulsifiers be necessary to achieve the required HLB value?
What contributes to the tendency of aggregates of globules to rise to the top or fall to the bottom of an emulsion?
What contributes to the tendency of aggregates of globules to rise to the top or fall to the bottom of an emulsion?
Why is it important for o/w emulsions to be easily removed from the skin?
Why is it important for o/w emulsions to be easily removed from the skin?
What is a crucial step required to prevent the separation of phases in pharmaceutical emulsions?
What is a crucial step required to prevent the separation of phases in pharmaceutical emulsions?
Which characteristic makes w/o emulsions more suitable for dry skin?
Which characteristic makes w/o emulsions more suitable for dry skin?
What is a disadvantage of pharmaceutical emulsions?
What is a disadvantage of pharmaceutical emulsions?
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