Synthesis and Characterization of SAMs and Tethered Bilayer Membranes from Unsymmetrically Substituted 1,2-Dithianes
Bibliographic record
Abstract
The synthesis of a series of new membrane-forming compounds, based on previously established components used in an ion-channel switch (ICS) biosensor (Nature1997, 387, 580) is described. All new compounds are derived from 4,5-dihydroxy-1,2-dithiane, and contain a hydrophilic reservoir section (based on ethylene glycol units) and a lypophilic section (based on the natural lipid phytanol). Ellipsometry and contact angle measurements indicate that self-assembled monolayers (SAMs) formed from the new materials possess thicknesses and membrane packing comparable to previously reported biosensor components. Tethered bilayer lipid membranes (t-BLMs) incorporating the novel materials were studied using impedance spectroscopy with the ion-carrier valinomycin. The electrical behavior and calculated membrane thickness of the t-BLMs are comparable to those derived from the standard ICS components and this demonstrates that the novel membrane-forming compounds form stable membranes that are sufficiently fluid to transport potassium ions in the presence of valinomycin.
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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".