Aerobic fermentation of ethanol by a mutant strain NF 1-1 of sake yeast Kyokai no.7
Bibliographic record
Abstract
To obtain higher productivity under aerobic fermentation, we screened for mutant strains of Sake yeast Kyokai no. 7 (K-7). A high concentration of ethanol producing mutant was isolated from 18 strains of non-foaming mutants. The NF 1-1 strain was placed in some media containing molasses and/or tomato extract, and the effect of culture conditions was studied. By shaking the culture at 30°C, a concentration of ethanol of 125.3 g/L with a productivity of 3.0 g/L·h, which was 1.1 times higher than that of the K-7 used, and a fermentation efficiency of 81.7% were obtained in a tomato extract medium that initially contained 30%(w/v) sugar. NF 1-1 showed lower ethanol tolerance, but higher heat tolerance and osmotic stress than its parent strain. The NF 1-1 strain was used in tomato wine brewing test on a fermentor for 20 h. As compared with the K-7 strain, the NF 1-1 strain produced a low concentration of succinic acid and malic acid, but the concentration of ethanol (7.6%) was higher than that of the K-7 used (6.7%) in a tomato juice that initially had 10%(w/v) sucrose added. The taste of the wine fermented by NF 1-1 was milder than its parent strain.
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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 | 0.001 |
| 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) | 0.000 | 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".