Beta‐carotene production within <i>Dunaliella salina</i> cells under salt stress condition in an indoor hybrid helical‐tubular photobioreactor
Bibliographic record
Abstract
For the cultivation of Dunaliella salina (a green unicellular eukaryote photosynthetic microalga), a 20 L indoor helical‐tubular photobioreactor was designed. The inner diameter and the thickness of the PU (polyurethane) tube were 12 and 2 mm, respectively, and its length was 75 m. An open pond was located on the top of the PBR structure and a pump circulated the culture medium from the pond to the tubes. Another part of the tube was connected to an airlift column (which was connected to the bottom of the pond), and the culture medium completed its circulation by moving from the airlift column that connected the closed system (tubular) to the open system (open pond). Eight LED lamps with 10 000 lx were set around the tube and a 2000 lx LED was adjusted on the top of the pond. The culture salinity within the PBR was 1 mol L −1 and four intermittent steps of 0.5 mol L −1 salt stresses were injected into the culture medium. The highest beta‐carotene production within this hybrid helical‐tubular PBR was 4.85 µg of beta‐carotene per mg of dry weight of microalgae at 2.5 mol L −1 salinity.
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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) | 0.001 | 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) | 0.000 | 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 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".