Development and evaluation of a multimedia environmental fate and food web model for phthalate esters in False Creek, British Columbia
Bibliographic record
Abstract
There is limited information on the environmental fate of di-alkyl phthalate esters (DPEs).To better understand the fate of DPEs and their primary metabolites, mono-alkyl phthalates (MPEs), a steady-state multimedia environmental fate and food-web model was developed and tested.The model suggests that the lower log K ow DPEs mainly flow out of the system and by a smaller extent in the ionized form of MPEs, or further biodegrade into phthalic acid.The higher log K ow DPEs are mainly bound to sediment that is buried and flow out of the system.The model also predicted that in fish, lower log K ow DPEs are mainly eliminated through gills whereas the higher log K ow DPEs undergo fecal route.Biotransformation of DEHP and mixture of C8 isomers are also predicted.This model can be used in preliminary ecological risk assessment to predict exposure concentrations, internal body burdens, and remediation targets in aquatic ecosystems.
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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 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".