Removal of Aqueous 17α-Ethinylestradiol by <i>Rhodococcus</i> Species
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Pharmaceutical substances such as 17α-ethinylestradiol (EE2), the active component of the contraceptive pill, are often not eliminated during wastewater treatment and are persistent in the environment. Using solid-phase extraction and chromatography methods for analyzing low concentrations of EE2 and metabolites, biodegradability of EE2 was studied using four bacteria grown under aerobic conditions in the absence or presence of a readily available carbon source (2.5 g/L of adipic acid or glucose). Preliminary identification of produced metabolites was also completed. In presence of a cosubstrate, Rhodococcus erythropolis removed EE2 up to 47% of its initial concentration (1.4 and 0.5 mg/L) in 13 h, while it removed only 10% after 75 h without a cosubstrate. In the presence of a cosubstrate, Rhodococcus equi removed EE2 up to 39% of its initial concentration (1.4 mg/L) after 65 h, whereas no significant EE2 removal was observed using Rhodococcus rhodochrous and Rhodococcus zopfii. Preliminary analysis of EE2 transformation products confirmed the presence of phenol and a compound of high molecular weight (331 amu). These results improve our understanding of the effect of common biological wastewater treatment variables such as bacteria strains, acclimation, and presence of cosubstrate, on the removal of EE2.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| 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 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 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 it