1. Plutonium is graded by its isotopic composition.

2. Both naturally-occurring and artificial isotopic mixtures can give useful information.

3. The problem was resolved using a trick called isotopic substitution.

4. As we have seen in Section 5.12, isotopic substitution can lead to changes in vibration frequencies.

5. Isotopic fingerprinting can also make an important contribution towards information about modern as well as ancient trade.

6. Their chemical and isotopic compositions are meteoritic and they have had long histories of flight through space.

7. This supernatant was used for measurement of isotopic enrichment of free leucine.

8. Isotopic compositions of continental intraplate mantle-derived magmas commonly vary as a function of lithospheric age.

9. Isotopic discrimination is not likely.

10. By correction of isotopic standards ,(sentencedict.com) the absolute measurement method of MC - ICPMS was established.

11. Based on isotopic geochemistry, relationship between mineralization of Shanmen deposit and regional magmatic activity is discussed.

12. The results agree with those by using isotopic method reported in the literature.

13. The isotopic signatures of most ancient limestones indicated the same process.

14. Stable isotopic method can be used effectively in the diagenetic research of deep water carbonate rocks.

15. Stable isotopic composition of fossil ostracode is used as an ideal proxy for paleo- lake sedimentary environments.

16. Development of geochronology from isotopic chronology to tectonic chronology must evolve several stages including ther- mal chronology, tectono-thermochronology and deformation chronology.

17. The relative large lithium isotopic fractionation in natural samples has useful application in the fields of geochemistry, cosmo-chemistry and nuclear chemistry.

18. S isotopic evidence suggests that sulphur originated from marine sulfate and stored in the interlayer water, consisted of intercrystalline water, void water and muckle water.

19. The proportional and carbon isotopic compositions of hydrocarbon and non-hydrocarbon gases are almost identical among these gold capsules.

20. Deformation modes involving hydrogen also drop dramatically in frequency on isotopic substitution.

21. The observed correlations are perhaps most simply attributed to mixing between components with differing isotopic composition and elemental abundances.

22. For example, the origin of ivory can be identified by its strontium isotopic composition,(http://sentencedict.com/isotopic.html) which reflects the diet of the elephant.

23. The array to the far left mimics the lead isotopic compositions at 130Myr.

24. Fluor carbonate minerals from the late stage veins have relatively low carbon and oxygen isotopic values, implying an involvement of mantle derived solution.

25. "We are currently undertaking osteological and forensics studies, but it will be some months before we have this information and we can compare it with the isotopic information, " he said.

26. It is showed that compensated neutron logging can be realized by using neutron generator instead of isotopic neutron source.

27. This paper discussed the relationship between solid content and density of aluminium hydroxide slurry and describes the measurement method and in situ applications of isotopic densitometer.

28. The succession, division and correlation of these strata are studied with lithostratigraphy, biostratigraphy and isotopic geochronology methods and by the combination of of point, line and area.

29. As a versatile example, the feasibility of this scheme applied to lutetium isotopic analysis by Laser Resonance ionization Spectrometry was discussed.

30. Micropore abundance increases with increasing coal maturity, which imposes much restriction on the gas flow and results in distinct isotopic fractionation.