Department of Agricultural Sciences, University of Helsinki, Finland.
Food Chem. 2013 Jan 1;136(1):87-93. doi: 10.1016/j.foodchem.2012.07.105. Epub 2012 Aug 3.
Common bean (Phaseolus vulgaris L.), the staple crop of Nicaragua, provides protein and nonhaem iron, but inhibitors such as phytate may prevent absorption of iron and zinc by the consumer. Warehouses in Nicaragua do not have controlled atmospheres, so beans are exposed to high temperatures and humidities that may accelerate quality loss. To evaluate the impact of 6months of storage on quality, four national accessions of common bean were submitted to two treatments, a conventional warehouse with uncontrolled temperature and humidity, and accelerated ageing at 40°C and 75% RH. Iron content was 61-81mg/kg of which 3-4% was bioavailable, and zinc content was 21-25mg/kg, of which 10-12% was bioavailable. Bioavailability generally increased in storage, significantly so in year-old INTA Linea 628 in accelerated ageing. The concentration of phytate was 8.6-9.6mg/g and it contained 54-63% of the total phosphorus. Improvement in bioavailability of divalent cations is needed.
普通菜豆（Phaseolus vulgaris L.）是尼加拉瓜的主要作物，为人们提供蛋白质和非血红素铁，但植酸等抑制剂可能会阻止消费者吸收铁和锌。尼加拉瓜的仓库没有控制的大气环境，因此豆子会暴露在高温高湿的环境中，这可能会加速质量损失。为了评估 6 个月储存对质量的影响，四个国家的普通菜豆品种分别进行了两种处理，一种是在没有温度和湿度控制的常规仓库中，另一种是在 40°C 和 75% RH 的加速老化条件下。铁含量为 61-81mg/kg，其中 3-4%是生物可利用的，锌含量为 21-25mg/kg，其中 10-12%是生物可利用的。生物可利用性通常在储存过程中增加，在加速老化的 INTA Linea 628 中尤为明显。植酸盐的浓度为 8.6-9.6mg/g，其中含有 54-63%的总磷。需要提高二价阳离子的生物利用度。
