Chromatographic and SCDP measurements of fossil phorbins and
Bibliographic record
Abstract
Estimates are compared of total chlorophyll derivatives from the sediments of mero-mictic Little Round Lake, Ontario, as determined. by the relative SCDP procedure and by quantitative paper Chromatographic fractionation. Contrasting profiles of total phorbins were obtained with the two techniques. By comparing SCDP:chromatographic phorbin ratios with extinction coefficients of purified derivatives, the discrepancies are tentatively ascribed to errors in the SCDP procedure resulting from variations in a phorbin compo-sition, interference by b phorbins, and possible interference by nonphorbin contaminants in the 90 % acetone extracts. SCDP data must, therefore, be interpreted with great care. FSom the algal phorbin data and additional information on bacterial phorbins, bacterial carotenoids, and the contemporary limnology of Little Round Lake, it appears that primaly productivity increased to a maximum early in postglacial time and then declined pro-gressively to the present low levels. The decline began with the probable onset of biogenic meromixis shortly after the early production maximum. The a:b phorbin ratio indicates strong differential diagenesis of the a phorbins in the lake and also the dominance of
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".