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首页> 外文期刊>Journal of King Saud University >Nutritional compositions and antioxidative capacity of the silk obtained from immature and mature corn
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Nutritional compositions and antioxidative capacity of the silk obtained from immature and mature corn

机译：从未成熟玉米和成熟玉米获得的蚕丝的营养成分和抗氧化能力

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The silks of immature and mature corn were evaluated for their variations in nutritional compositions, mineral content and antioxidant capacity. Both immature and mature silks were good source of nutritional compositions. Immature silks contained significantly higher moisture (89.31%) (fresh basis), lipid (1.27%) and protein (12.96%) content than the mature silk. Mature silks contained higher composition of ash (5.51%), carbohydrate (29.74%) and total dietary fiber (51.25 g/100 g), than the immature silk, but the difference was not significant. In mineral determination, immature silk was rich source of Ca (1087.08 μg/g), Mg (1219.17 μg/g), Cu (5.60 μg/g) and Zn (46.37 μg/g) than the mature silks. In contrast, other minerals such as K (35671.67 μg/g), Na (266.67 μg/g), Fe (4.50 μg/g) and Mn (35.57 μg/g) were found higher in the mature silk. The silks were extracted with ethyl acetate, ethanol and water using the Soxhlet extraction method to determine the polyphenol and ABTS radical scavenging capacity. From this study, the highest content of total polyphenol of immature silks was exhibited by ethanol extract (92.21 mg GAE/g) while water extract (64.22 mg GAE/g) had the highest polyphenol content among mature silk extracts. Total flavonoid content of both immature and mature silks was higher in the water extract at 8.40 mg CAE/g and 2.31 mg CAE/g, respectively. In the ABTS free radical assay method, all immature silk extracts had higher percentage of inhibition compared to the mature silks. Among all three crude extracts, the ethanol extract of immature (EC 50 = 0.478 mg/ml) and mature silk (EC 50 = 0.799 mg/ml) exhibited the strongest antioxidant capacity followed by the water and ethyl acetate extract.
机译：评价未成熟和成熟玉米的丝的营养组成，矿物质含量和抗氧化能力的变化。未成熟和成熟的蚕丝都是营养成分的良好来源。未成熟的蚕丝比成熟的蚕丝所含的水分（89.31％）（新鲜度），脂质（1.27％）和蛋白质（12.96％）明显更高。成熟的蚕丝比未成熟的蚕丝含更多的灰分（5.51％），碳水化合物（29.74％）和总膳食纤维（51.25 g / 100 g），但差异不显着。在矿物质测定中，未成熟的丝比成熟的丝富含Ca（1087.08μg/ g），Mg（1219.17μg/ g），Cu（5.60μg/ g）和Zn（46.37μg/ g）。相反，在成熟丝中发现其他矿物质如K（35671.67μg/ g），Na（266.67μg/ g），Fe（4.50μg/ g）和Mn（35.57μg/ g）较高。使用索氏提取法，用乙酸乙酯，乙醇和水提取丝绸，以确定多酚和ABTS自由基清除能力。根据这项研究，未成熟蚕丝中总酚含量最高的是乙醇提取物（92.21 mg GAE / g），而水提取物（64.22 mg GAE / g）在成熟蚕丝提取物中的多酚含量最高。水提取物中未成熟和成熟丝的总黄酮含量分别较高，分别为8.40 mg CAE / g和2.31 mg CAE / g。在ABTS自由基测定方法中，与成熟丝相比，所有未成熟丝提取物均具有更高的抑制率。在所有三种粗提取物中，未成熟的乙醇提取物（EC 50 = 0.478 mg / ml）和成熟的蚕丝（EC 50 = 0.799 mg / ml）表现出最强的抗氧化能力，其次是水和乙酸乙酯提取物。

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