Determination of Active Components in St. John's Wort (Hypericum Perforatum) by Capillary Electrophoresis with Electrochemical Detection
Why this work is in the frame
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Bibliographic record
Abstract
Abstract St. John's Wort ( Hypericum perforatum ) is a medicinal plant which has been known in traditional medicine as an anti‐inflammatory and healing agent. Nowadays, the alcoholic extract of its aerial parts finds wide application for its antidepressant activity. A capillary electrophoresis method for the identification of its constituents using electrochemical detection was developed. Effects of several important factors were investigated to acquire the optimum conditions. The working electrode was a 300 μm carbon disc electrode at a working potential of +0.90 V (vs. SCE). The analytes can be well separated within 20 min in a 75 cm length fused‐sillica capillary at a separation of 16 kV in 50 mmol L −1 borate buffer (pH=9.0). The current response was linear over about three orders of magnitude with detection limits ( S/N =3) ranging from 0.2 to 0.5 mg L −1 for all the analytes. The method was successfully used in the analysis of Hypericum perforatum with relatively simple extraction procedures, and the assay results were satisfactory.
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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 | 0.001 |
| 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 it