## Abstract The objective of the present investigation was to analyze the relative influence of oxalic acid, phytic acid, tannin and dietary fiber on __in vitro__ availability of iron and calcium from green leafy vegetables (GLV). Thirteen GLV were selected and analyzed for iron, calcium, oxalic ac
Bioavailability of iron in selected cereal based preparations — Anin vitro study
✍ Scribed by Sunitha, S. V. ;Urooj, Asna ;Puttaraj, Shashikala
- Publisher
- John Wiley and Sons
- Year
- 1995
- Tongue
- English
- Weight
- 437 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0027-769X
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✦ Synopsis
The percent available iron was determined in some commonly consumed cereal-based Indian food preparations using an in vitro method. Proximate composition, including ash content (by both dry and wet methods) of the food preparations was analysed. In rice-based preparations total iron content analysed after dry and wet ashing showed significant differences. Total iron content (by dry ashing) of the foods ranged from 5.0 (Pongal) to 42.3 mg (upittu). The percent soluble iron ranged from 74.2% (rice flakes upittu) to 12.2% (upittu). However, ionizable iron which ranged from 52.1% (Pongal) to 6.3% (upittu) depending on the food preparation, did not show similar pattern. Ionizable iron which varied significantly between foods showed a significant positive correlation with energy. The results not only emphasize the fact that it is important to understand the interaction between different foods but also that of meal composition for bioavailability of iron.
Zusammenfassung
Bioverfugbarkeit von Eisen in ausgewahlten auf Getreide basierenden Nahrungszubereitungeneine in vitro Studie
In Indien iibliche auf Getreide basierende Nahrungszubereitungen werden auf ihren Gehalt an prozentual verfiigbarem Eisen untersucht. Dazu werden die Lebensmittelmischungen bereitet, ihre Zusammensetzung analysiert und mittels trockener (Veraschung) und feuchter Methoden der Eisengehalt als Gesamteisen, ionisches und losliches Eisen bestimmt. Zubereitungen auf Reisgrundlage ergaben signifikante Unterschiede im Gesamteisen. Sein Gehalt bewegte sich im Bereich von 5,O mg Fe je 100 g (Pongal) und 42,3 mg Fe je 100 g (Upittu). Der prozentuale Anteil an losiichem Eisen erreichte Werte von 74,2% (4.9 mg FE) (Reisfladen, Upittu) und 12,2% (5,l mg Fe) (Upittu). Jedoch zeigt das in Ionen vorliegende Eisen mit 52,1% (2,6 mg Fe) (Pongal) und 6,3% (2,6 mg Fe) (Upittu) keine entsprechende Abstufung. Der Gehalt an ionischem Eisen, der sich in den Lebensmittelzubereitungen signifikant unterscheidet, weist eine positive Korrelation zum Energiewert auf. Die Ergebnisse zeigen, dal3 es fur die Verfiigbarkeit des Eisens wichtig ist, sowohl die Wechselwirkungen zwischen den verschiedenen Bestandteilen der Zubereitungen als auch deren Zusammensetzung zu kennen.
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