Synthesis of an optically transparent poly(<i>N</i>-isopropylacrylamide)-based thermally gelling material
Bibliographic record
Abstract
Restrictive barriers and efficient clearance mechanisms make delivery of therapeutics to the back of the eye particularly challenging. An optically transparent, thermally gelling copolymer scaffold that can simply be mixed with an active pharmaceutical ingredient of choice and injected directly into the vitreous chamber has been designed. The poly( N-isopropylacrylamide) (PNIPAAm)-based copolymer possesses a lower critical solution temperature near body temperature. Incorporating acrylic acid and poly(ethylene glycol) methacrylate into the polymer at optimized ratios modulates the lower critical solution temperature to transition the aqueous copolymer solution into a volume-consistent gel, which does not expel water, a common challenge with PNIPAAm-based materials. The addition of acryloyloxy dimethyl-γ-butyrolactone to the copolymer enables the polymer to slowly degrade and be cleared from the body. Herein, the synthesis and characterization of the novel copolymer scaffolds are described. A detailed report is provided on the intraocular biocompatibility profile as assessed via in vivo imaging techniques, histology, and immunostaining. Overall, the scaffolds were well tolerated in the rodent eye for the duration of the 17-day experiment.
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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 | 0.001 |
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".