ORIGINAL RESEARCH: Direct fermentation oftriticale starch to lactic acid by <i>Rhizopus oryzae</i>
Why this work is in the frame
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Bibliographic record
Abstract
The production of lactic acid from triticale starch was demonstrated for the first time. Direct fermentation by Rhizopus oryzae in batch mode led to a conversion yield of 0.74 g lactic acid/g starch. Kinetics analysis of the fermentation suggested a multiphase process which consisted of quick hydrolysis of starch, rapid glucose accumulation followed by fast production of lactic acid. In batch fermentation mode, correct timing and proper dosage of a neutralizing agent (calcium carbonate) were found to be critical factors that affect the organic acid yield. Addition of CaCO3 at the time point when glucose accumulation had reached its peak (24 h) resulted in the highest lactic acid yield. The best ratio (by weight) of triticale starch to CaCO3 for lactic acid production was 1:1. It was important to maintain a pH of about 5 during the whole fermentation process. Fermentation carried out in an optimized, commercially available small-scale parallel bioreactor (DASGIP) yielded up to 0.87 g lactic acid/g triticale starch when R. oryzae spores were directly added to the fermentation medium. Our fermentation results indicated that triticale starch from this nonfood crop is a promising renewable feedstock for production of lactic acid.
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
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 it