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Questions and Answers
What are the disadvantages associated with packaging semisolids in tubes?
What are the disadvantages associated with packaging semisolids in tubes?
- Aluminum corrosion, plastic degradation, loss of formulation components
- Bacterial contamination, product oxidation, increase in water loss (correct)
- Product leakage, tube breakage, incompatibility with formulation components
- Water absorption, reduced product shelf life, environmental hazards
Which of the following materials are commonly used for making tubes for semisolids?
Which of the following materials are commonly used for making tubes for semisolids?
- Aluminum and plastic (correct)
- Titanium and silicone
- Ceramic and cardboard
- Glass and steel
What coatings are applied to aluminum tubes to prevent interaction with components?
What coatings are applied to aluminum tubes to prevent interaction with components?
- Polyethylene or polypropylene
- Rubber or latex
- Epoxy resin or vinyl (correct)
- Polystyrene or acrylic
Which tube sizes are commonly used for semisolid preparations?
Which tube sizes are commonly used for semisolid preparations?
What is the approximate weight of ophthalmic semisolid preparation tubes?
What is the approximate weight of ophthalmic semisolid preparation tubes?
Which feature makes tubes a preferable choice over jars for packaging semisolids?
Which feature makes tubes a preferable choice over jars for packaging semisolids?
What makes aluminum tubes suitable for packaging semisolid preparations?
What makes aluminum tubes suitable for packaging semisolid preparations?
Thixotropy in gels refers to the ability of the gel to become ______ when sheared and regain its viscosity when the shearing force is removed.
Thixotropy in gels refers to the ability of the gel to become ______ when sheared and regain its viscosity when the shearing force is removed.
______ is the expulsion of liquid from a gel upon standing or aging.
______ is the expulsion of liquid from a gel upon standing or aging.
The process of ______ occurs when a polymer matrix swells and absorbs water or another solvent.
The process of ______ occurs when a polymer matrix swells and absorbs water or another solvent.
To prepare a carbopol gel, the polymer is first dispersed in ______ before neutralizing with a base.
To prepare a carbopol gel, the polymer is first dispersed in ______ before neutralizing with a base.
The pH of the dispersion medium can affect the ______ of the polymer chains in a hydrophilic gel.
The pH of the dispersion medium can affect the ______ of the polymer chains in a hydrophilic gel.
Preparation conditions, such as ______, can influence the final properties of a gel.
Preparation conditions, such as ______, can influence the final properties of a gel.
The concentration of the gelling agent plays a crucial role in determining the ______ of the resulting gel.
The concentration of the gelling agent plays a crucial role in determining the ______ of the resulting gel.
Carbopol gels are typically prepared by first dispersing the polymer in water and then ______ with a base.
Carbopol gels are typically prepared by first dispersing the polymer in water and then ______ with a base.
The rate of ______ can affect the swelling and gel formation process.
The rate of ______ can affect the swelling and gel formation process.
Gels can exhibit ______ behavior, where they can flow under shear stress and regain their structure when the stress is removed.
Gels can exhibit ______ behavior, where they can flow under shear stress and regain their structure when the stress is removed.
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