Berthold, Arnold Adolph

Japanese: ベルトルト（英語表記）Berthold， Arnold Adolph

Born: 26 February 1803, Soest
Died: February 3, 1861. Göttingen. German physiologist. After receiving his medical degree from the University of Göttingen in 1823, he studied comparative anatomy and zoology in Paris, and became a lecturer (1825) and professor (35) at the University of Göttingen. He showed that when the testes were removed from male chickens, secondary sexual characteristics did not appear, and that when testes were transplanted into such chickens, secondary sexual characteristics were produced (49), proving that the presence of the testes causes secondary sexual characteristics. This was a pioneering experiment proving the existence of an endocrine system for biological regulation.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

[生]1803.2.26. ゾースト
[没]1861.2.3. ゲッティンゲン
ドイツの生理学者。 1823年にゲッティンゲン大学で医学の学位取得後，パリで比較解剖学，動物学を修め，ゲッティンゲン大学講師 (1825) ，教授 (35) 。雄のニワトリから精巣を取除くと二次性徴が現れないこと，このようなニワトリに他から精巣を移植すれば二次性徴を生じることを示し (49) ，精巣の存在が二次性徴を引起すことを証明した。これは内分泌による生体調節機構の存在を立証する実験として先駆的なものであった。

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