Poly[<i>N</i>‐isopropyl acrylamide]‐<i>co</i>‐polyurethane copolymers for controlled release of urea
Bibliographic record
Abstract
Abstract A novel block copolymer of poly[N‐isopropyl acrylamide]‐co‐polyurethane was designed, synthesized, and applied as controlled release fertilizer coating. Structural confirmation of the copolymer was performed using FTIR and 1H‐NMR spectra and elemental analysis. The coating process consists essentially of immersing urea granules in molten polymer and removing the coated urea from the melt by centrifugal action. The morphology of the coated urea was studied using scanning electron microscope (SEM). The polymer coat of the urea granules was found to swell in water forming pores and enabling the release of urea. The urea released from the granule, monitored using a mass spectroscopy technique, was found to be governed by pH of the aqueous medium. The study anticipates development of a beneficiary fertilizer coat in terms of improving controlled release over a period of time which can be tailored by soil temperature, pH and moisture. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 3236–3243, 2010
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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) | 0.000 | 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 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".