Bibliographic record
Abstract
Abstract Dechlorane plus (DP) is a high-production volume chlorinated flame retardant, which is under consideration for listing under the Stockholm Convention on Persistent Organic Pollutants. In this study, we provide additional and timely information to help evaluate the spatial and temporal trends and long-range transport potential of DP at 67 sampling sites. The Global Atmospheric Passive Sampling network has been deploying passive air samplers quarterly since 2005. A retrospective analysis of samples from 2005 and 2006 indicates that DP is globally distributed in air with total DP levels ranging from nondetect to 30 pg/m3. The median value at urban sites (∼0.9 pg/m3) was approximately 10 times greater than at background, rural, and agricultural sites. The anti-DP/syn-DP ratio was relatively consistent across most site categories and in the range of values measured in commercial products containing DP. This suggests that both isomers are about equally capable of long-range transport in air. A retrospective analysis for selected sites covering the period of 2005–2011 showed declining levels of DP at urban sites in Paris and Toronto.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.001 |
| 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".