Bibliographic record
Abstract
Here we report on the discovery of a new triclinic crystal polymorphic form (β 1 ) of 1,2,3-stearoyl glycerol, or tristearin (SSS), CAS No. 555-43-1. This most stable polymorph of SSS has a melting point of 75.7 ± 0.5 °C and an enthalpy of fusion of 243.9 ± 10.5 J/g. The most stable polymorphic form for this well-known trisaturated monoacid triacylglycerol was obtained by static crystallization from a dilute solution of SSS in acetone at 4 °C over a period of 2 years. In contrast to the well-known β 2 form of tristearin, which displays wide-angle X-ray scattering reflection positions (relative intensities) at 4.61 Å (very strong), 3.86 Å (medium), and 3.70 Å (medium), the new β 1 tristearin displayed short-spacing positions (relative intensities) at 4.57 Å (weak), 3.84 Å (weak), and 3.68 Å (very strong). The small-angle X-ray scattering long-spacings corresponding to the lamellar sizes from the (001) plane were 44.91 Å, in contrast to 45.21 Å for the β 2 polymorph. This work clarifies controversies and uncertainties related to the number of triclinic polymorphs in trisaturated monoacid triaclyglycerols.
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How this classification was reachedexpand
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 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".