Isotope principles

Faure, G. (1986). Principles of Isotope Geology. John Wiley, New York, 2nd edn. Faure, G. and Mensing, T.M. (2005). Isotopes Principles and Applications. Wiley, Hoboken, NJ. 

Faure, G. and Messing, T. M. (2005) Isotopes Principles and Applications. New Jersey John Wiley and Sons, 897 pp. A tremendous resource for details about various techniques of radiometric dating. 

Diet and stable isotopes, western Mediterranean prehistory, 118-120 Dietary reconstruction from coprolites, human mtDNA extraction, Hinds Cave, Texas, 81 Dietary research through stable isotopes, principles and interpretation, 115-117 Dikgatlampi workings, Botswana, specularite sourcing, 465 Discriminant function analysis, INAA geochemical data, 466,469-477/... 

Faure, G., T.M. Mensing, 2005. Isotopes Principles and Applications. New York John Whey. Feller, R.L. (ed.) 1986. Artists Pigments A Handbook of Their History and Characteristics. 

Faure G, Hurley PM (1963) The isotopic composition of strontium in oceanic and continental basalts Application to the origin of igneous rocks. J Petrol 4(l) 31-50 Faure G, Mensing TM (2005) Isotopes principles and applications. Wiley, Hoboken, NJ... 

Faure G, Mensing TM (2005) Isotopes Principles and applications, 3rd edn. WUey, Hoboken, NJ Faure G, Mensing TM (2007) Introduction to planetary science The geological perspective. Springer, Dordrecht, The Netherlands... 

Faure G, Elliot DH (1971) Isotope composition of strontimn in Mesozoic basalt and dolerite from Dronning Maud Land. British Antarctic Surv Bull 25 23-27 Faure G, Mensing TM (2005) Isotopes Principles and applications, 3rd edn. WUey, Hoboken, NJ Faure G, HiU RL, Jones LM, EUiot DH (1972) Isotope composition of strontium and silica content of Mesozoic basalt and dolerite from Antarctica. In Adie RJ (ed) Antarctic geology and geophysics. Universitetsforlaget, Oslo, Norway, pp 617-624... 

The rapid fission of a mass of or another heavy nucleus is the principle of the atomic bomb, the energy liberated being the destructive power. For useful energy the reaction has to be moderated this is done in a reactor where moderators such as water, heavy water, graphite, beryllium, etc., reduce the number of neutrons and slow those present to the most useful energies. The heat produced in a reactor is removed by normal heat-exchange methods. The neutrons in a reactor may be used for the formation of new isotopes, e.g. the transuranic elements, further fissile materials ( °Pu from or of the... 

For those who are familiar with the statistical mechanical interpretation of entropy, which asserts that at 0 K substances are nonnally restricted to a single quantum state, and hence have zero entropy, it should be pointed out that the conventional thennodynamic zero of entropy is not quite that, since most elements and compounds are mixtures of isotopic species that in principle should separate at 0 K, but of course do not. The thennodynamic entropies reported in tables ignore the entropy of isotopic mixing, and m some cases ignore other complications as well, e.g. ortho- and para-hydrogen. 

Limbach H H 1991 Dynamic NMR spectroscopy in the presence of kinetic hydrogen/deuterium isotope effects NMR Basic Principles and Progress vol 23, ed P Diehl, E Fluck, H Gunther, R Kosfeld and J Seelig (Berlin ... 

Isotopes sufficiently long-Hved for work in weighable amounts are obtainable, at least in principle, for all of the actinide elements through fermium (100) these isotopes with their half-Hves are Hsted in Table 2 (4). Not all of these are available as individual isotopes. It appears that it will always be necessary to study the elements above fermium by means of the tracer technique (except for some very special experiments) because only isotopes with short half-Hves are known. 

Raman Spectroscopy. Raman spectroscopy is an excellent method for the analysis of deuterium containing mixtures, particularly for any of the diatomic H—D—T molecules. For these, it is possible to predict absolute light scattering intensities for the rotational Raman lines. Hence, absolute analyses are possible, at least in principle. The scattering intensities for the diatomic hydrogen isotope species is comparable to that of dinitrogen, N2, and thus easily observed. 

J. Bigeleisen ia P. A. Rock, ed.. Isotopes and Chemical Principles, American Chemical Society Symposium Series No. 11, 1975, pp. 1—43. 

The abundance of a trace element is often too small to be accurately quantihed using conventional analytical methods such as ion chromatography or mass spectrometry. It is possible, however, to precisely determine very low concentrations of a constituent by measuring its radioactive decay properties. In order to understand how U-Th series radionuclides can provide such low-level tracer information, a brief review of the basic principles of radioactive decay and the application of these radionuclides as geochronological tools is useful. " The U-Th decay series together consist of 36 radionuclides that are isotopes (same atomic number, Z, different atomic mass, M) of 10 distinct elements (Figure 1). Some of these are very short-lived (tj j 1 -nd are thus not directly useful as marine tracers. It is the other radioisotopes with half-lives greater than 1 day that are most useful and are the focus of this chapter. 

G. Fame, Principles of Isotope Geology, 2nd edn., 1991, Wiley, New York. 

Atomic masses calculated in this manner, using data obtained with a mass spectrometer can in principle be precise to seven or eight significant figures. The accuracy of tabulated atomic masses is limited mostly by variations in natural abundances. Sulfur is an interesting case in point. It consists largely of two isotopes, fiS and fgS. The abundance of sulfur-34 varies from about 4.18% in sulfur deposits in Texas and Louisiana to 4.34% in volcanic sulfur from Italy. This leads to an uncertainty of 0.006 amu in the atomic mass of sulfur. 

The isotope dilution principle, first employed by Hevesy and Hobbie (133) in 1932 for the determination of lead in ores, was applied by Schoenheimer et al. (241) to the determination of amino acids. [Shemin and Foster (248) have reviewed this topic.] An N15-amino acid derivative was added to a protein hydrolyzate, a sample of the amino acid to be determined was isolated and purified, the excess N15 in this product was estimated with the mass spectrograph, and the grams of amino acid originally present were calculated from Equation 2. 

The mechanism proposed for the production of radicals from the N,N-dimethylaniline/BPO couple179,1 involves reaction of the aniline with BPO by a Sn-2 mechanism to produce an intermediate (44). This thermally decomposes to benzoyloxy radicals and an amine radical cation (46) both of which might, in principle, initiate polymerization (Scheme 3.29). Pryor and Hendrikson181 were able to distinguish this mechanism from a process involving single electron transfer through a study of the kinetic isotope effect. 

This scheme requires a rate-determining (second) proton-transfer, against which there is considerable experimental evidence in the form of specific-acid catalysis, the solvent isotope effect and the hg dependence discussed earlier. Further, application of the steady-state principle to the 7i-complex mechanism results in a rate equation of the form... 

Most of the chemical reactions presented in this book have been studied in homogeneous solutions. This chapter presents a conceptual and theoretical framework for these processes. Some of the matters involve principles, such as diffusion-controlled rates and applications of TST to questions of solvent effects on reactivity. Others have practical components as well, especially those dealing with salt effects and kinetic isotope effects. 

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