A rapid micromethod for the determination of nitrogen in organic compounds, such as pyridine, pyrimidine, purine, thiazole, alkaloids and amino acids, is described.
2
之前，一项称为微量分光光度测定法的技术显示，鲨鱼的近亲鳐鱼和奇美拉都有辨色能力。
A technique known as microspectrophotometry had previously shown that rays and chimaeras, both close relatives of sharks, have color vision.
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