Water activity - An efficient tool for seed testing
Bibliographic record
Abstract
Water activity (aw) is a non destructive, portable and a rapid technique currently used to assess the moisture of hygroscopic materials (e.g. agro-food, pharmaceutical) and particularly, the one of intermediate products such as orthodox seeds . This technique (aw), as well as equilibrium Relative Humidity (eRH), is a reliable moisture indicator because it is directly related to the water potential (Ψ), which indicates the energy status of water in hygroscopic matrixes. While gravimetric moisture content (GMC) quantifies only the total amount of water in a product, aw qualifies the intensity of the bonds between water and other molecules (e.g. lipids, carbohydrates or proteins) and therefore, it illustrates the water availability and mobility within a substance. Water activity (aw) has three main advantages : this technique is rapid (less than 20 min per sample), non destructive (very interesting for small samples of great value such as seeds for ex situ genetic conservation), and easy to use (light training required). / La mesure de l'Activité de l'eau (aw) est un essai non destructif, portable et rapide actuellement utilisé pour évaluer l'état hydrique des matériaux hygroscopiques (p. ex., agro-alimentaire, pharmaceutique) et en particulier, les produits à humidité intermédiaire tels que les semences orthodoxes. Cette technique (aw), de même que " humidité relative d'équilibre " (HRE), est un indicateur d'humidité fiable car il est directement lié au potentiel de l'eau (Ψ), lequel indique l'état de l'énergie de l'eau dans les matrices hygroscopiques. Alors que le taux d'humidité gravimétrique (GMC) quantifie uniquement la quantité totale d'eau dans un produit, l' aw qualifie l'intensité des liens entre l'eau et les autres molécules (p. ex., lipides, glucides ou protéines) et, par conséquent, illustre la disponibilité et la mobilité de l'eau au sein d'une substance. L'activité d'eau (aw) possède trois principaux avantages : cette mesure est rapide (moins de 20 mn par échantillon), non destructive (très intéressante pour les petits échantillons de grande valeur comme les graines de conservation ex situ de ressources génétiques) et facile à utiliser (formation requise très limitée).
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.006 | 0.004 |
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".