Daughter Isotopes and Half-Life The half-life of an isotope is used to predict the time half of a sample will decay into a daughter isotope, but it cannot predict when an individual atom will decay into a daughter product. However, the nature of the decay product(s) form is highly predi...
The Pb isotope chemistry of the Aleutian arc serves to illustrate this point. From: Gondwana Research, 2012 About this pageSet alert Also in subject area: Chemical EngineeringDiscover other topics On this page Definition Chapters and Articles Related Terms Recommended Publications Chapters and Articles...
Fluorine‐18 Chemistry for Molecular Imaging with Positron Emission Tomography 3.1.9Bromo [18F]fluoride Bromo [18F]fluoride is different from the other electrophilic radiolabelling agents discussed so far in the sense that the electrophilic part of the molecule is not fluorine but bromine. This is ...
Simultaneous analysis of carbon dioxide isotopologues involved in the isotope exchange between the doubly substituted13C16O18O molecule and12C16O2has become an exciting new tool for geochemical, atmospheric and paleoclimatic research with applications ranging from stratospheric chemistry to carbonate-based g...
ISOTOPE LABELLING AND MASS SPECTROMETRY OF NATURAL PRODUCTSt CARL DJERASSI Department of Chemistry, Stanford University, Stariford, California, U.S.A. INTRODUCTION Mass spectrometry-as a tool in physical and chemical investigations- has been known for many years. Applications to structural problems in...
we extrapolate our results to constrain the oceanic Mg and Mg isotope budget over the past ~20 Myr and the implications for past variations in ocean chemistry and sedimentation patterns. This budget calculation suggests a significant LTH Mg sink, which requires a significant Mg sink to dolomite...
In contrast, vapour phase introduction of OsO4, also known as sparging, produces better intensities and fewer memory effects as well as providing an efficient separation of 187Os from 187Re without additional chemistry (Russ et al. 1987; Richardson et al. 1989; Gre- goire 1990). Hassler et ...
For the purposes of the scope of this book this definition is enough even if, as seen in Chapter 2, the world is far more complex than that. Although this is a simplification most observable patters of nuclear chemistry can be explained and the nomenclature can be kept simple. For example...
AI generated definition based on: Journal of Water Process Engineering, 2024 About this pageSet alert Also in subject areas: Biochemistry, Genetics and Molecular Biology Chemistry Physics and AstronomyDiscover other topics On this page Definition Chapters and Articles Related Terms Recommended Publications...
System-wide metabolic homeostasis is crucial for maintaining physiological functions of living organisms. Stable-isotope tracing metabolomics allows to unravel metabolic activity quantitatively by measuring the isotopically labeled metabolites, but has b