Untargeted metabolomic analysis of strawberries exposed to pulsed electric fields and cold plasma before postharvest storage
Why this work is in the frame
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Bibliographic record
Abstract
After being harvested, strawberries experience a decline in nutrients and anthocyanins, which is further exacerbated by their vulnerability to plant pathogen-related decay. As postharvest losses encompass up to 50 % of total production, the development of a physical method complementary to refrigeration to reduce these losses is a goal pursued globally, given a global market of US$19 B per year. In this study, two non-thermal technologies, pulsed electric fields (PEF) and cold plasma (CP), were used to evaluate their effectiveness in maintaining phytochemical integrity in exposed strawberries. A PEF treatment of 1 pulse at 1 kV/cm field strength in 3 L of tap water could significantly alter the volatile and metabolomic composition of the fruit, while simultaneously reducing its firmness during cold storage. However, subjecting the fruit to a CP treatment at 15 % (210 watts) for 1 min did not impact the quality parameters. Furthermore, unlike the PEF treatment, the strawberries retained their firmness during storage and exhibited a consistent volatile and metabolomic profile. Based on these results, CP treatment enhances firmness and maintains the compounds found in strawberries, meanwhile, while PEF treatment might not be ideal for preserving the physicochemical parameters of fruit
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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 | 0.002 |
| 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