Localization and modeling of reaction and diffusion to explain folate behavior during soaking of cowpea
A first modeling approach was used to understand the behavior of folate in cowpea seeds during soaking at different temperatures (30 °C, 60 °C and 95 °C). Folic acid, 10-formylfolic acid, 5-methyltetrahydrofolate, and 5-formyltetrahydrofolate were quantified in both the seeds and the soaking water during the process. A 2D-axisymmetric seed soaking simulator was then built considering these 4 folate vitamers to simultaneously describe diffusion, oxidation and interconversion of the single vitamers. The model adjustments revealed the predominance of folate diffusion at 60 °C and 95 °C (apparent diffusivity 2–3 × 10−11 m2 s−1) whereas at 30 °C enzymatic interconversions of all vitamers into 5-methyltetrahydrofolate were observed (reaction rate of 8.0 × 10−5 s−1 for 5-formyltetrahydrofolate). The results of this study allow us to recommend a preliminary soaking step to retain folate in seeds and to improve the bioavailability of folates for human nutrition.
| Main Authors: | , , , , , , |
|---|---|
| Format: | article biblioteca |
| Language: | eng |
| Subjects: | Q02 - Traitement et conservation des produits alimentaires, niébé, Vigna unguiculata, trempage, acide folique, diffusion, vitesse, modèle de simulation, http://aims.fao.org/aos/agrovoc/c_1938, http://aims.fao.org/aos/agrovoc/c_8247, http://aims.fao.org/aos/agrovoc/c_7127, http://aims.fao.org/aos/agrovoc/c_3009, http://aims.fao.org/aos/agrovoc/c_24936, http://aims.fao.org/aos/agrovoc/c_24098, http://aims.fao.org/aos/agrovoc/c_24242, http://aims.fao.org/aos/agrovoc/c_875, |
| Online Access: | http://agritrop.cirad.fr/591744/ http://agritrop.cirad.fr/591744/7/591744_MMA.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|