二莲叶防水和自洁之谜
The mystery of two lotus leaves' waterproof and self-cleaning
荷叶的表面附着着无数个微米级的蜡质乳突结构。用电子显微镜观察这些乳突时,可以看到在每个微米级乳突的表面又附着着许许多多与其结构相似的纳米级颗粒,科学家将其称为荷叶的微米-纳米双重结构。正是具有这些微小的双重结构,使荷叶表面与水珠儿或尘埃的接触面积非常有限,因此便产生了水珠在叶面上滚动并能带走灰尘的现象。而且水不留在荷叶表面。
The surface of lotus leaf is attached with numerous micron scale wax papillae. When observing these papillae with electron microscope, we can see that there are many nano particles on the surface of each micro papilla, which are similar to their structures. Scientists call them the micro nano double structure of lotus leaf. It is these tiny double structures that make the contact area between the lotus leaf surface and water droplets or dust very limited, so that water droplets roll on the leaf surface and can take away dust. And water doesn't stay on the surface of lotus leaves.
三藕断丝连的科学解释
The scientific explanation of three lotus roots' disconnection
谈到荷,自然就要提到藕。荷属睡莲科,是多年生草本植物,种植在浅水塘中。其茎生于淤泥中,变态为根状茎,即是藕,也称莲藕。藕横长在泥中,靠基茎节上的须状根吸取养分。由于藕肉质肥厚,脆嫩微甜,含有大量的淀粉,营养丰富,所以自古以来就是人们喜爱的食品。
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