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 machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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 | 0.000 |
| 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 source (direct Gemma or distilled Codex), 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".