Enhanced biobutanol production using novel clostridial fusants in simultaneous saccharification and fermentation of green renewable agriculture residues
Why this work is in the frame
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Bibliographic record
Abstract
Abstract Thermostable Clostridia species were developed in the present study through protoplast fusion between mesophilic and thermophilic clostridial species. Two parental strains of Clostridia species, Clostridium acetobutylicum ( ATCC 4259) and Clostridium beijerinckii ( ATCC BA101 ), along with three fused strains, Clostridium acetobutylicum Clostridium thermocellum ( CaCt ), Clostridium beijerinckii Clostridium thermocellum ( CbCt ) and Clostridium acetobutylicum Clostridium beijerinckii ( CaCb ), were examined for biobutanol production using wheat straw ( WS ) as a feedstock in a batch process of simultaneous saccharification and fermentation ( SSF ). The objective of the study was to use the thermotolerant fused strains to enhance enzymatic activity during the SSF by raising the incubation temperature and thereby eventually increasing biobutanol production. Results from the current study indicated that the fused strains were able to produce the required enzymes at higher temperature essential for the saccharification of WS (i.e., endoglucanase , exoglucanase , and β‐ glucosidase ). This will have a major impact on eliminating costs associated with adding enzymes to the saccharification process. Fused strain CbCt achieved the highest biobutanol production of up to 14.13 g/L (i.e., a yield of 0.29) at 45 °C with total sugar consumption of 82%. Enzymatic activity of CbCt was found to be 61.67 FPU (filter paper unit) which was the highest in comparison with other fused strains evaluated in this study. These results indicate a breakthrough for the technological and economical obstacles associated with industrialization of the SSF process. © 2015 Society of Chemical Industry and John Wiley & Sons, Ltd
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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 | 0.000 | 0.000 |
| 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 | 0.000 |
| 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 it