Metabolic availability of threonine in common foodstuffs in pigs
Bibliographic record
Abstract
Availability of amino acids (AA) in foodstuffs must be known to ensure adequate dietary supply. Ileal digestibility and protein digestibility amino acid score do not account for the true metabolic utilization of absorbed AA. Availability of AA in adult animals may be different from growing pigs. The metabolic availability (MA) of threonine (THR) in corn and barley was determined in 8 pregnant sows and 8 growing pigs using the indicator amino acid oxidation method ([1‐ * C] phenylalanine). Reference diets provided 40 – 80% of the THR requirement; other nutrients were set at 120% of requirement, and test diets provided THR at 80% of requirement. Tracer phenylalanine was given orally in 8 ½‐hourly meals and expired 13 CO 2 and 14 CO 2 was quantified. The MA of THR in corn and barley in sows was 88.0 and 89.3%, respectively. The MA of corn in growing pigs was 82.2%, similar to the published true ileal digestibility of THR in corn (82.0%). Metabolic availability is therefore, a good estimate of the true availability of AA in foodstuffs. Pregnant mature animals have a greater capacity to digest and utilize AA in common ingredients than growing animals. Funding: AB Pork, ON Pork, ALIDF, ACAAF, Ajinomoto.
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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".