Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"crystal size distributions"”.
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Modeling and Simulation of Antisolvent Crystallization: Mixing and Control
… the issues of mixing and control in antisolvent crystallization processes, and to aid the development of systematic and scientific design approaches. The first part presents the development of an algorithm that couples macromixing and micromixing models with the population balance equation. It …
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Optimal Control of Antisolvent and Cooling Crystallization
Common quality requirements for crystallization products is so critical in the pharmaceutical industry, including the demands of the drug administration and customers (e.g. bioavailability, size uniformity, and polymorphic form) and the concern of the manufacturer for downstream processes such as …
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Order and chaos in the olivine underworld: two mechanisms for the formation of basal olivine layers
… element compositions, mineral compositions, crystal size distributions and modal mineralogy. Parent-Daughter modeling, Pearce Element Ratio Analysis, trace element modeling, and MELTS (Ghiorso and Sack, 1995; Asimow and Ghiorso, 1998) were then used to model formation mechanisms. Finally, the …
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Crystalization studies in hollow fiber devices
Crystallization was examined under a new perspective and in a flow environment much different from that available in currently used industrial devices. Three crystallization techniques were tested in the unique flow environment offered by hollow fiber devices. In addition, a new type of heat …
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Assessing the dependence of bulk ice properties from probes with anti-shatter tips on environmental conditions
… data are not available to characterize how ice crystal properties vary as a function of environmental conditions. Furthermore, many of these assumptions are derived from historical datasets collected by in situ probes, namely optical array probes that can be contaminated by shattered artifacts …
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Bubbles and crystals: time-resolved sonoluminescence, sonocrystallization, and sonofragmentation
… is also employed in the preparation of molecular crystals, although the field remains in its infancy. The effects of high-intensity ultrasound on the preparation of pharmaceutical compounds are explored here, with emphasis on the breakage of particles post-crystallization. A model compound, …
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The design, development and testing of a non-invasive continuous crystalliser system for the study of calcium oxalate crystallisation processes
… for conventional MSMPR analysis. Various crystalliser offtakes and six system designs were developed and tested to allow measurements using the thermostatted flow cell. The flow cell allows for continuous measurement of the sample dispersion using a noninvasive monitoring instrument - a …
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Chiral resolution control in batch and continuous crystallization processes for a conglomerate forming compound
… in the pharmaceutical industry is preferential crystallization. In a preferential crystallization process, supersaturated racemic (equal mixture of both enantiomers) solution is seeded with pure crystals of the preferred enantiomer. Over time these crystals grow, removing the preferred …
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Deciphering the Signature of Magma Mixing: Examples from the Castle Creek Eruptive Period, Mount St. Helens, Washington
… compositional imaging integrated with feldspar crystal chemistry data collected by electron microprobe. Petrographic and quantitative petrographic analyses were performed on 5 samples of Castle Creek basalt. MELTS closed-system fractional crystallization simulations were also executed to model …