High starch and carbohydrate content in rice (Oryza sativa Linn.) disparages this food responsible for postprandial hyperglycemic excursions. However, rice is an Asian food synonym. Additionally, in traditional Indian healing practices, rice is used for treatment of various disorders. In this research, we analyzed micronutrient and phytochemical contents in different rice samples available in market. Effect of aqueous-ethanol extract of each type of rice was evaluated against intestinal α-glucosidase to examine extract’s influence on carbohydrate digestion. Free-radicals scavenging activities as a measure of antioxidant potential in different rice were also examined. Brown-rice presented highest (54%) α-glucosidase inhibition followed by parboiled-rice (52%), idly-rice (48%), hand-pounded rice (42%), dosa-rice (40%) and basmati-rice (39%). Polished white sona-masoori rice presented least enzyme inhibitory (31%) activity. Presence of higher α-glucosidase inhibitory activity was regarded as slow digesting rice that would impart lesser postprandial glycemic excursion. Brown and parboiled-rice presented highest ABTS֗⁺ radical scavenging (74%) activity whereas; idly-rice displayed highest DPPH scavenging (50%) activity. Higher polyphenol and niacin contents in rice were found significantly (p<0.0001 and p<0.01 respectively) correlated with enzyme inhibitory activity. Higher polyphenol content was found responsible for enhanced free-radicals scavenging activity. Increasing concentrations of niacin and pantothenic acid correlated with ABTS֗⁺ radical scavenging activity.

中文翻译：

---

各种大米（Oryza sativa Linn。）样品中微量营养素和植物化学物质的含量可不同地控制碳水化合物的消化，并呈现出不同的抗氧化活性：一项体外评估

高淀粉和大米碳水化合物含量（水稻Linn。）剥夺了这种食物，使餐后血糖升高。但是，大米是亚洲食品的代名词。另外，在印度传统的治疗方法中，大米用于治疗各种疾病。在这项研究中，我们分析了市场上可获得的不同大米样品中的微量营养素和植物化学成分。评估了每种大米的水乙醇提取物对肠道α-葡萄糖苷酶的影响，以检查提取物对碳水化合物消化的影响。还检查了自由基清除活性，作为不同大米中抗氧化能力的量度。糙米对α-葡萄糖苷酶的抑制作用最高（54％），其次为半熟米（52％），空饭（48％），手捣米（42％），多沙米（40％）和印度香米。大米（39％）。抛光的白色sona-masoori稻表现出最小的酶抑制（31％）活性。存在较高的α-葡萄糖苷酶抑制活性被认为是消化缓慢的大米，其将赋予较少的餐后血糖偏移。棕色和米饭呈现出最高的ABTS֗⁺清除自由基（74％）的活性，而；稻米显示出最高的DPPH清除率（50％）。发现水稻中较高的多酚和烟酸含量与酶抑制活性显着相关（分别为p <0.0001和p <0.01）。发现较高的多酚含量负责增强的自由基清除活性。烟酸和泛酸浓度的增加与ABTS֗ ⁺自由基清除活性有关。