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Science:没有干净地剥橘子的方法

标签:剥桔 干净 方法
摘要 : 剥桔子时,无论你的动作有多慢、多小心,仍然可能将橘汁弄在手上。为了了解这背后的原因,研究人员用高速相机通过慢动作捕捉了在挤压或弯曲柠檬、脐橙和巴伦西亚橙子的外壳时发生了什么。

 

剥桔子时,无论你的动作有多慢、多小心,仍然可能将橘汁弄在手上。为了了解这背后的原因,研究人员用高速相机通过慢动作捕捉了在挤压或弯曲柠檬、脐橙和巴伦西亚橙子的外壳时发生了什么。

研究人员随后利用工程工具测量充满液体的油腺体内累积的压力,这些油腺体位于柑橘类水果皮的下方。腺体从球形到近圆柱状形状各异。科学家发现,它们能够以每秒10.5米的速度向外喷射出液滴,这比昆虫飞翔或雨点滴落的速度更快。

该团队在近日举行的社会综合与比较生物学年会上报告称,这些液滴可以在1毫米的形变之内从静止达到最高速度,其承受的加速度是宇航员飞往太空时经历的1000倍。

目前,该研究团队正在设法弄清楚这一速度为何会如此快地获得,为什么油会如此快地变为小液滴。他们表示,这些信息有助于设计充满药物的爆炸性口袋的紧急哮喘吸入器。

原文链接:

This video reveals why there’s no clean way to peel an orange

原文摘要:

No matter how slowly and carefully you peel an orange, you’re likely to get juice on your hands. To find out why, researchers used high-speed video to capture in slow motion what happens when the rinds of lemons, and navel and Valencia oranges are squeezed or bent. They then applied engineering tools to measure the pressure that built up inside the fluid-filled oil glands that sit just under the skin of citrus fruits. The glands vary from spherical to almost cylindrical, building up enough pressure inside before rupturing that they can shoot droplets out at 10.5 meters per second (faster than an insect can fly or a raindro can fall), the scientists found. And the droplets go from standing still to top speed in less than a millimeter, being subjected to acceleration 1000 times that experienced by astronauts taking off in space, the team reported here today at the annual meeting of the Society for Integrative and Comparative Biology. The researchers are still trying to figure out exactly how this speed is so quickly achieved and why the oil quickly breaks into small droplets, information that could help them design an emergency asthma inhaler filled with exploding pockets of medicine, they note.

来源: Science 浏览次数:0

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