Pivoting colloidal assemblies exhibit mechanical metamaterial behaviour

· · 来源:data资讯

The British weren’t alone in their hunt. Chileans, New Zealanders, and South Africans, among others, were also scrambling to source this strategic substance. A few months after the Pearl Harbor attack, the U.S. War Production Board restricted American civilian use of agar in jellies, desserts, and laxatives so that the military could source a larger supply; it considered agar a “critical war material” alongside copper, nickel, and rubber.1 Only Nazi Germany could rest easy, relying on stocks from its ally Japan, where agar seaweed grew in abundance, shipped through the Indian Ocean by submarine.2

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(新华社北京2月27日电 记者韩洁、胡璐、古一平、韩佳诺)

A windfall, delayed

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