Japanese word

活性

Pronunciation

Romajikassei

温度が低いと、酵素の活性が下がります。on do ga hiku i to kō so no kas sei ga sa ga ri ma su

When the temperature is low, enzyme activity decreases.

研究者は新しい薬の活性を測定します。ken kyū sha wa atara shi i kusuri no kas sei o soku tei shi ma su

Researchers measure the activity of a new medicine.

Expresses how actively something performs its function or produces an effect.

効力kōryoku: The power of a substance, treatment, or other thing to produce an effect.

物質や生体などが機能を発揮する度合いや、働きが盛んな性質。bus shitsu ya sei tai na do ga ki nō o hak ki su ru do a i ya hatara ki ga saka n na sei shitsu

活性 (kassei) is a Sino-Japanese compound of 活 (katsu, "living") and 性 (sei, "nature"), referring to an active quality.

In science, 活性 (kassei) often describes how strongly an enzyme or other substance works, rather than how many actions occur.