บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Effect of some post-harvested treatments on the bioavailability of zinc from some selected tropical vegetables.

Akindaunsi, A. A.; Oboh, G.;

Rivista Italiana delle Sostanze Grasse Year: 1999 Vol: 76 Issue: 6 Pages: 285-287 Ref: 14 ref.

1999

บทคัดย่อ

Effect of some post-harvested treatments on the bioavailability of zinc from some selected tropical vegetables.

The effects of sun drying, oven drying (75 and 100 deg C) and blanching at 100 deg C for 5 min on the bioavailability of Zn from Celosia argentea, Talinum triangulare, jute, Vernonia amygdalina, Basella alba and Amaranthus hybridus was investigated. Phytate and Ca contents were also analysed and phytate:Zn, Ca:phytate and [Ca][phytate]/[Zn] molar ratios were calculated. The phytate levels were high (1128.2-2752.9 mg/100 g) and were further increased by the drying treatments, but blanching reduced phytate levels by 33.3-65.0%. The phytate:Zn molar ratio was generally lower than the critical value of 15:1. However, while sun drying and oven drying at both 75 and 100 deg C gave high figures for the calculated [Ca][phytate]/[Zn] molar ratios, 5 min blanching at 100 deg C gave normal figures for this ratio, except in T. triangulare. Vernonia amygdalina had the lowest values for the 3 ratios, indicating that this species was the best source of zinc. The results of the study indicate reduced zinc bioav

ailability from vegetables caused by postharvest treatments such as sun drying and oven drying compared with blanching which gave excellent results.