First- and Zero-Order Kinetics of Porogen Release from the Cross-Linked Cores of Diblock Nanospheres
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Bibliographic record
Abstract
The porogen poly(2-hydrocinnamoyloxyethyl methacrylate) containing some adenine groups P(hCEMA- r -A) was prepared and separated into five fractions. The porogen and diblock copolymer poly{(2-cinnamoyloxyethyl methacrylate)- random -(2-hydrocinnamoyloxyethyl methacrylate)- random -[2-(1-thyminylacetoxyethyl methacrylate)]}- block -poly( tert -butyl acrylate), P(CEMA- r -hCEMA- r -T)- b -P t BA, formed micelles with P t BA coronas and P(CEMA- r -hCEMA- r -T)/P(hCEMA- r -A) cores in chloroform/cyclohexane. The cores of the micelles were cross-linked due to photodimerization of the CEMA units. Dispersion of the nanospheres in deuterated N, N -dimethylformamide (DMF- d 7 ) triggered porogen release, and the kinetics were followed by NMR spectroscopy. While the release of the low-molar-mass fractions followed approximately the first-order rate law, zero-order kinetics was observed for the release of the fraction with the highest molar mass. The rationale for the first- to zero-order kinetic transition was given. Also justified is the scaling relation observed between the diffusion coefficient and molar mass of the porogens. This zero-order release kinetics may find applications in controlled drug delivery.
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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 | 0.000 |
| 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