改かい質しつ

か

い

し

つ

Meanings

Technical term used in chemistry and materials science for altering the properties or structure of a substance, often to improve quality or performance.

触しょく媒ばいを使つかってナフサを改かい質しつし、高こうオクタン価かガソリンを製せい造ぞうする。
Naphtha is reformed using a catalyst to produce high-octane gasoline.
このプロセスは、ポリマーの表ひょう面めん改かい質しつに用もちいられる。
This process is used for surface modification of polymers.

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Kanji

改reformation, change, modify
質substance, quality, matter

Related words

改かい良りょう
改良 is a general term for improvement or betterment, while 改質 specifically refers to altering the inherent properties or structure, especially in technical contexts.
改かい変へん
改変 means alteration or modification, often with a nuance of changing the original form, whereas 改質 focuses on quality or property enhancement.

Word family

接せっ触しょく改かい質しつ
catalytic reforming
水すい蒸じょう気き改かい質しつ
steam reforming

Etymology

Compound of 改 (kai, 'reform, change') and 質 (shitsu, 'quality, substance'). The exact historical derivation is uncertain, but the term is used in modern technical fields to mean reforming or modifying the quality of a material.