Dittmar, D.

Japanese: Dittmar,D.(英語表記)DittmarD
Dittmar, D.

…Water sampler
[Chemical properties of seawater]

[Chemical composition]
When seawater collected from all over the world is analyzed in this way, it is found that the amount of salt contained in seawater varies somewhat depending on the location and depth, but the concentration ratio of major elements is constant. This fact gradually became clear through the analytical results of chemists in the 19th century, and was largely established through research by D. Dittmar on seawater samples from various ocean areas obtained during the Challenger voyage in the 1870s. The amount of salt (in grams) dissolved in 1 kg of seawater is called salinity, and it is customarily expressed in parts per thousand (‰). …

*Some of the terminology that mentions "Dittmar, D." is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…採水器
【海水の化学的性質】

[化学組成]
 このようにして全世界の海から採取した海水を分析してみると,海水中に含まれる塩の量は場所や深さによっていくらか異なるが,主要な元素の濃度比は一定であるということがわかる。この事実は,19世紀の化学者たちの分析結果からしだいに明らかになり,1870年代のチャレンジャー号の航海で得られた各海域の海水試料についてのディットマーD.Dittmarの研究によってほぼ確立された。 海水1kg中に溶けている塩の量(g数)が塩分salinityであり,千分率(‰)で表す習慣になっている。…

※「Dittmar,D.」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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