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問問Master Joe
早前有謠言指食用鹽內含有可抗幅射的物質「碘」,掀起一輪「搶鹽」的恐慌,但事實上這說法毫無科學根據,而且過度攝取鹽份更會使身體出現其他健康問題呢!雖然鹽並不可以助大家抗幅射,但它還有很多與科學有關的用途,鹽能調味,既可帶出食物的鮮味,又有保鮮作用。此外,鹽也可以令人脫水。為甚麼鹽有這些的功效?聽聽Master Joe 的講解吧﹗ 兩隻雞蛋分別放於清水與鹽水中,雞蛋會浮於鹽水水面上但沉於清水水底,到底鹽與浮力之間的關係是怎樣的呢?人們喜歡以鹽來醃製食物,利用鹽的特質使食物脫水,減少食物腐壞的機會,令食物得以保存一段長時間,究竟當中的原理是怎麼樣的呢?另外,當大家吃了太鹹的食物時隨即會感到口渴,原來這跟鹽和體內細胞的含水量也息息相關,一起從實驗中了解一下鹽的各項特性吧﹗
Video Length: 0
Date Found: April 16, 2011
Date Produced:
View Count: 7
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