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Powder Mixing (Ordered mixing (Segregation (Displacement of drug,…
Powder Mixing
Ordered mixing
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Tablet mix, dry powder inhaler
Segregation
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Percolation - according to carrier particle size - small carriers,drug reach
Segregation
Reduce
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Granulation - increase size, narrow distribution
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< 30 micrometer, sieving. remove fines
Types
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Trajectory
Size different, large more kinetic energy, move greater distance,
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Factors
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Composed of particles diff shape, size and density
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Mixers
Powder Volume
Appropriate, not overfilling (insufficient bed dilation) or under filling (cost)
Good
Dust tight, easy cleaning
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Tumbling - hollow vessel rotate, mix themselves
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