reduction

Japanese: reduction
reduction

...In the narrow sense, oxidation is when a substance combines with oxygen, and reduction is when an oxide loses oxygen. For example, when copper (Cu) is heated in air, it undergoes the reaction 2Cu + O 2 - → 2CuO to become copper oxide (CuO). ...

From [Arrangement]

…There are many types of arrangements, ranging from those faithful to the original to those that incorporate significant originality. In vocal scores for operas and piano arrangements of symphonies, faithfulness to the original is required, and in these cases the term reduction is used. In the West, especially from the 15th and 16th centuries onwards, arrangements became an important means of composition. …

*Some explanations of terms that mention "reduction" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…狭義の定義として,物質が酸素と結合することを酸化oxidationといい,酸化物が酸素を失うことを還元reductionという。たとえば,銅Cuを空気中で加熱すると, 2Cu+O2―→2CuOの反応をして酸化銅CuOとなる。…

【編曲】より

…原作に忠実なものから,パロディや大幅な独創性を加味したものなど,その用途や目的によって多くの種類がある。オペラのボーカル・スコアや交響曲のピアノ編曲などでは原作に忠実であることが求められ,この場合はとくにリダクションreductionなどの語が用いられる。 西洋では,とくに15,16世紀以降,編曲は重要な作曲手段となった。…

※「reduction」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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