Effect of α-tocopherol on in vitro culture of bovine embryos
Bibliographic record
Abstract
Bovine oocytes were matured and fertilised under 5% CO2. Presumptive zygotes were co-cultured in synthetic oviductal fluid droplets, supplemented with either 0 (control), 25, 50, 100, or 200 µM of α-tocopherol. Blastocyst development rates were significantly influenced (P < 0.05) by the level of antioxidant in the culture media. Control showed a blastocyst yield of 18.46, 21.11, 27.92, and 31.66%, respectively, at α25; α50 and α100. Blastocyst yield for α200 was severely decreased, to 8.01%. An increase in overall IVF results was also observed as the concentration of α-tocopherol increased (control, 14.21%; α25, 14.35%; α50, 19.52%; α100, 21.11%), decreasing to 5.75% for the concentration of α200. The present study clearly demonstrates that α-tocopherol at a concentration of 100 µM significantly improves the proportion of oocytes that develop to the blastocyst stage. Key words: Antioxidant, α-tocopherol, reactive oxygen species, bovine, embryo
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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 | 0.000 | 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) | 0.001 | 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".