78. Molecular dispersions with <1nm sized particles can pass through semi-permeable membrane but not through ultra filters. 79. Butter, shaving creams, and milk are examples of colloidal dispersions. 80. Suspensions are heterogenous system composed of at least 2 phases.
True or False.
78. Molecular dispersions with <1nm sized particles can pass through semi-permeable membrane but not through ultra filters.
79. Butter, shaving creams, and milk are examples of colloidal dispersions.
80. Suspensions are heterogenous system composed of at least 2 phases.
81. Particle size range for coarse dispersions would be 1nm to 500nm
82. The label for Amoxicillin 125mg/5ml powder for suspension says to add 72mL of distilled water. The therapeutic ingredient is the internal phase.
83. Drugs in suspension have higher rate bioavailability compared to compressed tablets but lower rate of bioavailability compared to solutions.
84. Suspension of drug can be formulated for topical application.
85. The phenomenon of sedimentation is directly affected by gravitational force.
86. Stoke’s equation is used to predict the rate of sedimentation
87. Structured vehicles like a thickening agent are used in parenteral suspensions because it imparts higher viscosity.
88. Xanthan gum and carrageenan are suspending agents that give thixotropy to the media.
89. Polysorbate 80, a non-ionic surfactant reduces interfacial tension thus allowing wetting agents to penetrate through pores of drug particles
90. Brownian movement of particles prevents sedimentation by keeping the dispersed material in random motion.
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