| 21. | The isotope effect showed that materials with heavier ions ( different nuclear isotopes ) had lower superconducting transition temperatures.
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| 22. | Of the various theoretical treatments of kinetic isotope effects, Bigeleisen's seems to be the most popular.
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| 23. | The subscript " s " refers to these " semiclassical " kinetic isotope effects, which disregard quantum tunneling.
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| 24. | In addition, strong isotope effects observed affect the retention time of differently labeled isotopomers in the GC column.
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| 25. | A generalized treatment of kinetic isotopic effects is via the GEBIK and GEBIF equations describing transient kinetic isotope effects.
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| 26. | Hydrogen Minerals generally have large isotope effects, and the isotopic composition often follows the pattern observed for precipitation.
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| 27. | This mechanism is contested by a possible alternative 13 C and deuterium kinetic isotope effects points toward the aldol mechanism.
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| 28. | A stepwise or a largely asynchronous mechanism has been proposed for the catalyzed reaction based on kinetic isotope effect studies.
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| 29. | Hence, more often than not, weakening of bending frequencies is not an important cause of large kinetic isotope effects.
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| 30. | Transpiration exhibits a normal isotope effect, causing enrichment of deuterium in plant leaf water and therefore enrichment of leaf waxes.
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