Antimicrobial activity of glucosamine-derived flavour compounds
Bibliographic record
Abstract
Glucosamine is an amino sugar capable of non-enzymatic browning reactions at temperatures normally considered mild as compared to the standard browning processes. Glucosamine caramel solutions can be produced under mild temperature conditions to generate flavour compounds like fructosazine (FR) and deoxyfructosazine (DOFR). This study produced FR and DOFR at mild temperatures from GlcN to evaluate their antimicrobial activities. Glucosamine browning was conducted at 50°C for 48 h, and FR and DOFR were quantified and purified through liquid chromatography, and then their antimicrobial activity was determined against Escherichia coli (E. coli) AW 1.7 with the minimum inhibitory concentration assay (MIC50) at pHs 5 and 7. The mechanism of action for FR and DOFR was evaluated based on the integrity of E. coli’s outer membrane using the N-phenyl-1-napthylamine (NPN) uptake assay. FR but not DOFR possess a MIC50 of 3.3 g/L at pH 5. At pH 7 no MIC50 was reached for both FR and DOFR. This is due the permeabilization of E. coli’s outer membrane, which was the greatest at pH 5 (p < 0.01). Results suggest that FR has both flavour and antimicrobial activity.
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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".