argon isotope ratioの例文

例文

1. "I think the argon isotope ratio measurement is very convincing, " said Dr . Kenneth A . Farley, a professor of geochemistry at the California Institute of Technology.
2. Meanwhile, gases at small planets such as Venus and Mars have isotopic differences indicating atmospheric escape processes . { argon isotope ratio planet meteorite } { neon isotope ratio meteorite}
3. Analysis of three fragments using isotopic composition techniques used to date Solar System objects, showed the isotopic clocks in the asteroids ( rubidium and strontium ratios, argon isotope ratios ) appear to have partially or totally reset in past collisions.