Flow injection-chemiluminescent assay for the determination of superoxide dismutase activity
Bibliographic record
Abstract
Superoxide dismutase (SOD) activity was measured using a flow injection-chemiluminescent assay (FI-CLA) based on xanthinexanthine oxidase dependent superoxide (O2.) formation. The mobile phase consists of 50 mM potassium phosphate buffer (pH 7.4) containing lucigenin (5 µM) and xanthine (0.3 mM). Under optimum conditions, bovine albumin did not affect chemiluminescence at concentrations of 11000 µg mL1 and KCN inhibited 100% of the Cu, Zn-SOD activity using 5 µL of a 0.23 mM concentration. The analysis of one sample was done in less than 30 s with a relative standard deviation of ±3.1%. SOD activity in the biological samples was correlated to the amount of exogenously applied SOD. The FI-CLA method reported here appears to be one of the faster and more useful tools used to assay SOD activity.Key words: superoxide dismutase, flow injection-chemiluminescent assay, superoxide, xanthine oxidase, lucigenin.
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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 | 0.004 | 0.002 |
| Meta-epidemiology (narrow) | 0.004 | 0.001 |
| Meta-epidemiology (broad) | 0.003 | 0.001 |
| Bibliometrics | 0.003 | 0.002 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.003 | 0.001 |
| Research integrity | 0.002 | 0.005 |
| Insufficient payload (model declined to judge) | 0.025 | 0.006 |
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".