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the time on stream during which the rate constant for the catalytic reaction, , falls to a specified fraction of its original value, often 0.5, aeg, mille jooksul katalüütilise reaktsiooni kiiruskonstant langeb algväärtuseni
lagunemisaeg . Keemiaterminite baas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//kem/lagunemisaeg/1/est (11.07.2026)