It is difficult to know exactly when the shift from gelatine to agar occurred. As often happens for scientific breakthroughs, agar was likely adopted incrementally alongside the use of other growth media. In 1913, for example, the first diagnosis of Serratia marcescens as a human pathogen was made by growing it on agar as well as on potatoes.
record equipment or "business machines," arguably the first form of business
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这向上的顽强冲力无声无息，却比任何呐喊都更加撼动人心。它不问为何而生，更不虑如何终老，只是存在着、生长着，完成一次“生”的庄严历程。相比之下，人类或许因了太多的意义追问，反而失了这份自然的纯粹的勃发劲头。人们总在不断地张望、回溯，像一棵犹豫该往何处分蘖枝丫的树，却忘了生命最初也是最本质的冲动，便是如这草芽一般向着光，沉默而坚定地肆意生长。