Measuring the Effect of Dietary Microplastic on Biomagnification Potential of Environmental Contaminants and Plastic Additives
Bibliographic record
Abstract
Orally ingested microplastics (MPs) have been theorized to increase, decrease, and/or negligibly affect the uptake of hydrophobic organic contaminants (HOCs) and plastic additives in the gastrointestinal tract. Concentrations of selected polychlorinated biphenyls (PCBs) and two additives (UV-328 and octabenzone) in weathered polyvinyl chloride MPs and polar bear diet and feces were determined using modified total extraction methods. Analyte fugacities were investigated by equilibrating dietary or fecal mixtures, with and without added MP, within silicone polymer-coated vessels. High MP concentrations slightly decreased fugacities of PCBs and significantly increased those of the additives. Overall, results suggest MPs are not a major source of dietary HOCs, possibly exerting a cleansing effect instead, but potentially sources of plastic additives in a “Trojan Horse” effect. The presence of MPs had no major impact on fugacity-based biomagnification factors (BMFF) or thermodynamic biomagnification limits (BMFlim).
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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 | 0.000 |
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".