Bibliographic record
Abstract
Silks are natural protein fibers produced by insects and spiders. The mechanical properties of silks span a wide range, and include combinations, for example, strength and extensibility, that are difficult to achieve in synthetic polymers. A variety of solid-state NMR techniques have played a crucial role in the understanding of the structure and microscopic basis of the properties of silks. Isotropic chemical shifts measured with CP/MAS reflect the secondary structure of the protein backbones. Two-dimensional correlation spectroscopy experiments have allowed more direct measurement of backbone conformations, and measurements of anisotropic interactions such as chemical shift anisotropies, and dipolar and quadrupolar couplings have allowed measurement of molecular orientation in oriented fiber samples. The silks that have been most thoroughly studied with NMR, domesticated silkworm (Bombyx mori) cocoon silk and spider dragline silks, are semicrystalline fibers containing oriented β-sheet crystallites. The noncrystalline regions in these silks are much less well ordered, but in at least some cases do appear to have preferred structures. To date, only a handful of different silks from the enormous variety of silk-producing organisms in nature have been studied with NMR in any detail.
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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) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".