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首页> 外文期刊>African Journal of Food, Agriculture, Nutrition and Development >Proximate composition and the functional properties of defatted seed and protein isolates of kargo (Piliostigma reticulatum) seed
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Proximate composition and the functional properties of defatted seed and protein isolates of kargo (Piliostigma reticulatum) seed

机译：kargo（Piliostigma reticulatum）种子的脱脂种子和分离蛋白的近成分和功能特性

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The proximate composition of the Kargo seeds and the physico-chemical properties of the seed oil have been determined. Matured dried seeds were collected. They were then dehusked and pulverized into a fine powder and kept in air tight sample bottle for further analysis. Functional properties of the defatted sample and its protein isolate were also determined. The seed is rich in both crude protein (40.4%) and lipid (27.9%) and, therefore, could be classified as an oil seed. The crude protein for the defatted sample is significantly (p<0.05) higher than the protein value recorded for the undefatted (303g/kg). At room temperature the lipid extract was a liquid. The lipid is a clear golden yellow colour with low acid value (0.5%), but high saponification value of 205.1 mg KOH/g and iodine value of 103.9. The elemental analysis carried out on both the undefatted and the defatted seed shows that, the seed is a good source of potassium, phosphorus, magnesium and calcium. The defatted flour samples recorded a higher values for all the mineral elements determined except for the manganese which though very minute in quantity was observed to be doubled in the undefatted sample. The value recorded for both potassium and magnesium are significantly higher (p≤0.05) in the defatted sample than in the undefatted sample. Both the defatted flour and protein isolate show good foaming, emulsion and water binding properties. The defatted sample has a low water and oil binding capacity (1.84 and 0.41%, respectively) compared to the values recorded for the protein isolates (2.77 and 0.94% respectively). There is a significant difference (p≤0.05) in the values obtained for the foaming stability of the defatted flour sample (3.92%) and the protein isolate (0.01%). This indicates that Kargo seed protein isolate with estimated protein content of 86.0% and good functional properties has a potential for dietary improvement in the food industries.
机译：已经确定了Kargo种子的最接近组成和种子油的理化性质。收集成熟的干燥种子。然后将它们去壳并粉碎成细粉，并保存在气密样品瓶中以进行进一步分析。还确定了脱脂样品及其蛋白质分离物的功能特性。种子富含粗蛋白（40.4％）和脂质（27.9％），因此可以归类为油料种子。脱脂样品的粗蛋白显着（p <0.05）高于未脱脂记录的蛋白值（303g / kg）。在室温下，脂质提取物为液体。脂质为透明的金黄色，酸值低（0.5％），但皂化值为205.1 mg KOH / g，碘值为103.9。对未脱脂和脱脂种子进行元素分析表明，种子是钾，磷，镁和钙的良好来源。脱脂面粉样品记录了所有测定的矿物质元素的较高值，但锰含量虽然很小，但在未脱脂样品中却增加了一倍。脱脂样品中钾和镁的记录值均显着高于未脱脂样品中（p≤0.05）。脱脂面粉和蛋白质分离物均显示出良好的起泡，乳化和水结合性能。与蛋白质分离物记录的值（分别为2.77和0.94％）相比，脱脂样品的水和油结合能力较低（分别为1.84和0.41％）。脱脂面粉样品（3.92％）和蛋白质分离物（0.01％）的发泡稳定性值存在显着差异（p≤0.05）。这表明估计蛋白质含量为86.0％且功能特性良好的Kargo种子蛋白质分离物在食品工业中具有改善饮食的潜力。

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