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.
全球每年钪产量仅为几十吨，但它在燃料电池、特种铝合金以及先进芯片工艺和封装环节中承担关键角色。
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