Source: Computational Materials Science, Volume 267
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.
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朋友是江苏如皋人，她说小时候家里种的黑塌菜遍地都是，谁也没把它当回事。可如今，靠着冷链技术，这不起眼的“土菜”竟坐上飞机出了海，成了外国人餐桌上的稀罕物。还有哈尔滨，那片冰雪本是当地人习以为常的冬日，用好用足，叠加热情服务，乐了八方来客，连本地人也感慨“尔滨，你让我感到陌生”。绿水青山、冰天雪地都是金山银山，思想入心、思路出新，寻常风景也有新的价值坐标。