A Kinetic Model of the Magnesium Hydroxide–Based Peroxide Bleaching Process of a TMP
Bibliographic record
Abstract
In this study, a kinetic model of the magnesium hydroxide–based peroxide bleaching was developed. A thermo‐mechanical pulp (TMP) was used to determine how the bleaching rate is affected by the peroxide and alkali concentrations, and temperature at a high pulp consistency (30% pulp consistency). The model was based on the rate of chromophore elimination characterized by the decrease in the light absorption coefficient of bleached pulp at 457 nm, Ck. The reaction rate of chromophore destruction proceeds via a very fast phase initially, followed by a second phase, which is much slower and approaches asymptotically a “floor level” of chromophore concentration. The rate equation is: The term of Ck−Ckf represents reactive chromophores available in the pulp. Ckf was determined as 3.04 m2/kg, which corresponds to a brightness of 79.6% ISO.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.002 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 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".