31. Siderite is commonly found in isotopic composition of meteoric water shortly after deposition. 32. Isotopic substitution can modify the rate of reaction in a variety of ways.33. Even isotopic differences must be considered when examining chirality. 34. This, and further experiments used carbon isotopic labelling. 35. Evidence for this mechanism is found in isotopic labeling. 36. The extension is marked by the isotopic ages of the previously mentioned rocks. 37. Hence the isotopic composition of lithium can vary somewhat depending on its source. 38. First the monoisotopic peak may not be resolved from the other isotopic peaks. 39. Eighteen different values were attained using six isotopic species. 40. Isotopic profiles of Gal�pagos rocks can be matched with those from CLIP rocks.
