Purification and Characterization of Molybdenum Species from <i>Medicago sativa</i> (Alfalfa) Grown on Mine Tailings
Bibliographic record
Abstract
Extraction, purification, and identification procedures were developed for the chemical investigation of molybdenum (Mo) in freeze-dried aerial portions of alfalfa (Medicago sativa L.) collected from a reclaimed tailings pond at the Highland Valley Copper mine in British Columbia. The purification procedures were guided by ICP and colorimetric analyses. The methods included development of an efficient aqueous extraction protocol, sample cleanup by partitioning against n-butanol, and filtration through diatomaceous earth. Further purification was achieved by anion-exchange chromatography, elution with aqueous NaCl, and desalting by gel filtration. Final purification of the Mo-containing fraction was carried out using preparative anion-exchange HPLC. Molybdenum was found to be present in its purified form as the molybdate anion (MoO(4)(2-)) primarily on the basis of multinuclear ((1)H, (13)C, and (95)Mo) NMR studies.
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How this classification was reachedexpand
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 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 teacher head, 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".