The interactive effects of enriched sources of <i>Aspergillus</i> ferulic acid esterase and <i>Trichoderma</i> xylanase on the quantitative release of hydroxycinnamic acids from oat hulls
Bibliographic record
Abstract
Oat hulls contain relatively high amounts of hydroxycinnamic acids, mainly ferulic (4-hydroxy-3-methoxycinnamic) and p-coumaric acids (4-hydroxy-cinnamic), which are inhibitory to cell wall biodegradability by rumen microorganisms. In this paper, a study of the interactive effects of enriched sources of Aspergillus ferulic acid esterase (A-FAE) and Trichoderma xylanase (T-XYL) at different levels on the quantitative release of ferulic acid and p-coumaric acid from oat hulls was carried out. The results show that relative to A-FAE alone, the combined action of A-FAE and T-XYL was superior in causing the release of ferulic acid [up to 41.0% (± 2.1%)], indicating that T-XYL is important in acting with A-FAE in the degradation of feruloyl-polysaccharides of oat hulls. There was no effect of A-FAE alone, but a significant effect of A-FAE in combination with T-XYL on the release of p-coumaric acid from oat hulls. However, there was no extensive release of p-coumaric acid [(maximum release of 9.0% (± 0.7%)] by A-FAE in the presence of T-XYL, indicating a specificity of A-FAE for feruloyl groups, which only efficiently releases ferulic acid and not p-coumaric acid from oat hulls. This study suggests that A-FAE with T-XYL has an interactive effect to be able to break the ester linkage between ferulic acid and the attached sugar, releasing a significant proportion of the ferulic acid from oat hulls. This action, which causes disruption of crosslinks, has the potential to improve hydrolysis of the remaining polysaccharides by rumen microorganisms, which, in turn, would improve rumen degradability of oat hulls. Key words: Ferulic acid esterase, oat hulls, hydroxycinnamic acids, biodegradation
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How this classification was reachedexpand
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 | 0.000 |
| Science and technology studies | 0.000 | 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) | 0.000 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".