A New Microcrystalline Phytosterol Polymorph Generated Using CO<sub>2</sub>-Expanded Solvents
Why this work is in the frame
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Bibliographic record
Abstract
Phytosterols have been receiving increasing attention due to their demonstrated health benefits. Micronization of phytosterol particles is desirable to enhance their physiological efficacy. Utilization of the environmentally friendly compressed fluid-based technology, called Depressurization of an Expanded Liquid Organic Solution (DELOS) was investigated to micronize a phytosterol mixture. A new polymorph of β-sitosterol, which was more crystalline than the native form, was obtained from the DELOS process regardless of the process conditions. In addition, particle size was reduced by an order of magnitude. The crystal structure of the new polymorph was determined from X-ray powder diffraction data. The proposed crystal structure for β-sitosterol, which contains a number of nearly isosteric vicariant molecules of lower molecular weight (mostly campesterol and campestanol, accounting in a crystalline solid-solution for nearly 10% of the molecular mixture) allows the presence of small cavities, in which some residual solvent molecules are temporarily trapped. Further structural analysis of the new and native polymorphs were performed by laser diffractometry, scanning electron microscopy, differential scanning calorimetry, thermogravimetric analysis, and X-ray powder diffraction. Findings of the study provide a route to obtain nutraceutical products that might show enhanced functional properties.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it