Characterization of Residue (C5-C7) Asphaltene (Soluble in n-Heptane but Insoluble in n-Pentane)
Bibliographic record
Abstract
(C5-C7) asphaltene(soluble in n-heptane but insoluble in n-pentane) of Canada oilsand bitumen vacuum residue(VTB) was charactered and compared with n-pentane asphaltene and n-heptane asphaltene with the help of GPC,XRD,1H-NMR,SEM measurements and HyperChem simulation.(C5-C7) asphaltene has a small yield of 9.80% and composes mainly small moleculars,whose average structure unit possesses the lowest aromaticity and aromatic ring number but maximum naphthenic ring number(2.60).The length of(C5-C7) asphaltene alkane chains connected with aromatic rings is 0.5 more carbons than the other two asphaltenes.There is no aromatic sheet stacking structures existing in(C5-C7) asphaltene,which is different from n-pentane and n-heptane asphaltenes.(C5-C7) asphaltene has the biggest stable energy(266.73 kJ/mol),leading to a worst stability,whose particles have a large dimension and smooth surface.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 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) | 0.001 | 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 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".