Gallic acid reduces the viscosity and water binding capacity of soluble dietary fibers
Bibliographic record
Abstract
Water binding capacity and viscosity of soluble dietary fibers are known to be essential drivers of their nutritional benefits. Phenolic compounds, often found in the presence of dietary fibers, are also known to bind non-covalently with soluble dietary fibers. In this study, we characterized the impact of gallic acid (1-30 mM) on the physical properties of four soluble dietary fibers in solution (0.75% w/w oat β-glucans with medium and high molecular weights, 0.75% w/w guar galactomannan and 0.5% w/w xanthan mannoglucuronoglucan). Isothermal titration calorimetry and particle size analysis showed that gallic acid and soluble dietary fibers formed poorly dissociable non-covalent complexes, leading to colloidal aggregation of the fibers. Upon complexation, the physical properties of the fibers changed dramatically with up to a 65% increase in water mobility (reflecting a dramatic decrease in water binding capacity), up to a 41% increase in pseudo-plastic behavior leading to near-Newtonian behavior, and up to a 95% decrease in viscosity. This suggests that combinations of free phenolic compounds and soluble dietary fibers may be detrimental to the physical and potentially the nutritional properties of the fibers.
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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".