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Old 09-08-2011, 01:02 PM   #1
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Default 做菜勾芡保护胃--健康资讯-

很多人做菜时喜欢勾芡,光波炉团购,可别小看这么个动作,勾过芡的菜不仅营养物质得到了很好的保存,盟特
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  很多人做菜时喜欢勾芡,可别小看这么个动作,勾过芡的菜不仅营养物质得到了很好的保存,芡汁还能起到保 护胃黏膜的作用。勾芡所用的芡汁大部分用淀粉和水搅拌而成,淀粉在高温下糊化,具有一定的黏性,有很强的吸 水和吸收异味的能力。
  一般的菜肴,其汤比菜味浓,而且汤中还有许多无机盐、维生素等营养物质。勾芡会使汤汁裹在原料上,减少 食物中营养素的损失。特别值得一提的是,勾过芡的菜适合有胃病的人吃,光波炉原理。因为淀粉是由多个葡萄糖分子缩合而成的多糖聚合物,它可与胃酸作用,形成胶状液,附在胃壁上,形成一层保 护膜,防止或减少胃酸对胃壁的直接刺激,保护胃黏膜。
  一般来说,勾芡要掌握好时间,应在菜肴九成熟时进行。过早会使芡汁发焦;过迟则易使菜受热时间长,失去 脆嫩的口味。二是勾芡的菜肴用油不能太多,否则芡汁不易黏在原料上,盟特新奇特加盟。三是菜肴汤汁要适当,汤汁过多或过少,会造成芡汁过稀或过稠,影响菜的质量。勾芡用的淀粉,主要有绿豆淀 粉、马铃薯淀粉、麦类淀粉等,这些淀粉对人体健康是绝对安全的,可以放心食用。由于淀粉吸湿性较强,容易发 生霉变,霉变后千万不要食用,其中会产生一种可导致肝癌的黄曲霉素。另外,有些菜是不需勾芡的,如口味清爽 的菜(如炒豆芽),含胶原蛋白较多的菜(如红烧蹄筋),需加入酱、糖的菜(如酱汁鱼),含淀粉较多的菜(如 炒土豆丝)等。 ■文/于惠
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