利用類澱粉蛋白來傳輸水分子 水分子單向擴散

 陽明交通大學生命科學暨基因體科學研究所教授許世宜的研究團隊，利用類澱粉蛋白來傳輸水分子，發現可以使海水 100% 脫鹽，找到淡化海水的不同方式。

這項方法是用三片類澱粉蛋白組成的奈米微管（nanotube），透過蛋白薄膜表面上的電位差來推動水分子往單一方向移動，同時又能達到阻擋鹽離子穿過（鈉離子、氯離子），形成一個自帶分子馬達，不需外部提供任何能量。

許世宜：「水分子單向擴散在生物界是很常見的現象，例如蜘蛛絲、蝴蝶翅膀都可以觀察到水分子單向流動，這些流動不需要外部能量，而是透過基本的生化及物理機制來完成。」

文字編輯：騰騰

scientists turned to neutron tomography for answers.

Unable to open this heavily corroded, likely 12th-century pendant—but curious about what's inside—scientists turned to neutron tomography for answers.



ARSTECHNICA.COM
Neutron imaging revealed the secrets of this gold-plated medieval pendant

 neutron tomography

Neutron tomography is a form of computed tomography involving the production of three-dimensional images by the detection of the absorbance of neutrons produced by a neutron source.^[1] It creates a three-dimensional image of an object by combining multiple planar images with a known separation.^[2] It has a resolution of down to 25 μm.^[3][4] Whilst its resolution is lower than that of X-ray tomography, it can be useful for specimens containing low contrast between the matrix and object of interest; for instance, fossils with a high carbon content, such as plants or vertebrate remains.^[5]

Neutron tomography can have the unfortunate side-effect of leaving imaged samples radioactive if they contain appreciable levels of certain elements such as cobalt,^[5] however in practice this neutron activation is low and short-lived such that the method is considered non-destructive.

中性子断層撮影法（ちゅうせいしだんそうさつえいほう NCT）は、非破壊検査の一種で、中性子線を検査対象に照射して内部を透過させて3次元構造を生成する撮影法^[1]。

概要