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- W4234465769 abstract "Turbula bottle blenders are often used in lab-scale experiments during early-stage pharmaceutical product development. Unfortunately, applying knowledge gained with these blenders to larger-sized diffusion mixers is limited by the lack of blending models that include Turbula mixers. To address this need for lubrication blending scale-up, 2:1 blends of microcrystalline cellulose and spray-dried lactose or dibasic calcium phosphate were mixed with 1% magnesium stearate using Turbula bottle blenders, varying bottle volume, V (30–1250 mL); bottle headspace fraction, Fheadspace (30–70%); and the number of blending cycles, r (24 to ∼190,000 cycles). The impact of lubrication blending on tensile strength and bulk specific volume quality attributes, QA, was modeled by:where QA0 is initial QA value, β is sensitivity of QA to lubrication, γ is formulation-specific lubrication rate constant, and L is characteristic mixing length scale (i.e. 1.5V1/3 for Turbula blenders, V1/3 for simple diffusion mixers). The factor of 1.5 captures the bottle dimensions and the more complex mixing dynamics of the Turbula blender. This lubrication blending process model is valid for scale-up from 30-mL to 200-L blenders. Assessing bulk specific volume may provide a simpler, more material-sparing means for determining γ than tensile strength, since these QAs exhibited similar γ values." @default.
- W4234465769 created "2022-05-12" @default.
- W4234465769 date "2000-02-01" @default.
- W4234465769 modified "2023-10-17" @default.
- W4234465769 title "Turkish PM conference attracts international audience" @default.
- W4234465769 doi "https://doi.org/10.1016/s0026-0657(00)94235-8" @default.
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