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单词 protagon
释义 protagon Physiol. Chem.|ˈprəʊtəgɒn|
[a. G. protagon (Liebreich), f. Gr. πρῶτ-ος first + ἄγον, neut. pres. pple. of ἄγειν to lead.]
A highly complex crystalline substance, containing nitrogen and phosphorus, found in brain and nerve tissue.
1869Roscoe Elem. Chem. xli. 407 The Brain and other nerve-centres contain a substance termed Protagon.1871H. Spencer Princ. Psychol. (ed. 2) I. i. v. 83 Fibrous nerve-tissue is chemically distinguished from..vesicular nerve-tissue by the presence..of a substance called protagon.1904Titchener tr. Wundt's Physiol. Psychol. I. 54 Protagon, a highly complex body, to which Liebreich [Ann. Chem. & Phar. CXXXIV. (1865) 29] has assigned the empirical formula C116H241N4PO22.
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