The duckweed Lemna minor recovers following 7, 14, 21, and 28 day exposures to atrazine at environmental concentrations
Bibliographic record
Abstract
We characterized the ability of the duckweed Lemna minor to recover from 7, 14, 21, and 28-day exposures to the herbicide atrazine. Static renewal assays were performed for each duration (with an exposure series of 0, 10, 20, 40, 80, 160 and 320 µg/L atrazine) followed by a 7-day recovery period in clean media. We observed full recovery (no statistical difference from control) in dry mass, frond number, and plant number growth rates at concentrations typically found in the environment ( ≥80 µg/L atrazine), regardless of the exposure duration. The USEPA currently regulates atrazine on an aquatic plant Concentration Equivalent Level of Concern of 10 µg/L (60-day average concentration) and our data support this decision.
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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".