Fourier transform nuclear

The crystalline mineral silicates have been well characterized and their diversity of stmcture thoroughly presented (2). The stmctures of siHcate glasses and solutions can be investigated through potentiometric and dye adsorption studies, chemical derivatization and gas chromatography, and laser Raman, infrared (ftir), and Si Fourier transform nuclear magnetic resonance ( Si ft-nmr) spectroscopy. References 3—6 contain reviews of the general chemical and physical properties of siHcate materials. 

The objective of this study is to characterize tin-containing polymers on a molecular level by means of high field, high resolution, multinuclear Fourier Transform Nuclear Magnetic Resonance (FT-NMR) (4 ). This study is generally an applied approach dealing with composition and configuration of specific formulations of the copolymer. 

Geick, R. Fourier Transform Nuclear Magnetic Resonance, 95, 89-130 (1981). 

Robins, D., A. Alstin, and D. Fletton (1987), The examination of organic components in historical non-metallic seals with C-13 Fourier transform nuclear magnetic resonance spectroscopy, in Grimstad, K. (ed.), 8th Triennial Mtg., Int. Council of Museums Committee for Conservation, Sidney, pp. 82-87. 

Fourier Transform Mass Spectrometry Fourier Transform Nuclear Magnetic Resonance Spectrometry... 

Fourier transform nuclear magnetic resonance (nmr), 21 278 Fourier transform spectrometers, 19 671 23 137... 

NMR spectrum. Fourier transform nuclear magnetic resonance (FTNMR) instruments, which are similar in principle to Fourier transform infrared spectrometry (FTIR) instruments, are popular today. We will briefly describe these instruments later in this section. 

The advent of computers and Fourier transform completely revolutionized the detection and identification of organic compounds. Modern automated instruments allow very small samples in the nanogram (10 g) range to be characterized in a very short time. The application of Fourier transform nuclear magnetic resonance (FTNMR) and Fourier transform infrared (FTIR) allows recovery of the sample in contrast to mass spec-trometric (MS) determination which is a destructive but quite often a necessary technique. 

E.P. Mazzola, A.P. Borsetti, S.W. Page, D.W. Bristol, Determination of pesticide-residues in foods by F-19 fourier-transform nuclear magnetic-resonance spectroscopy, J. Agric. Food Chem. 32 (1984) 1102-1103. 

I. P. Gerothanassis, Methods of avoiding the effects of acoustic ringing in pulsed Fourier transform nuclear magnetic resonance spectroscopy. Prog. Nud. Magn. Reson. Spectrosc., 1987,19, 267-329. 

With the advent of advanced characterization techniques such as multiple detector liquid exclusion chromatography and - C Fourier transform nuclear magnetic resonance spectroscopy, the study of structure/property relationships in polymers has become technically feasible (l -(5). Understanding the relationship between structure and properties alone does not always allow for the solution of problems encountered in commercial polymer synthesis. Certain processes, of which emulsion polymerization is one, are controlled by variables which exert a large influence on polymer infrastructure (sequence distribution, tacticity, branching, enchainment) and hence properties. In addition, because the emulsion polymerization takes place in an heterophase system and because the product is an aqueous dispersion, it is important to understand which performance characteristics are influended by the colloidal state, (i.e., particle size and size distribution) and which by the polymer infrastructure. 

Armitage, I.M., Pajer, R.T., Uiterkamp, A.J.M.S., Chlebowski,J.F. and Coleman, J.E. (1976) Cadmium-133 Fourier Transform nuclear magnetic resonance of cadmium(II) carbonic anhydrase and cadmium(II) alkaline phosphatase./. Am. Chem. Soc., 98, 5710-5712. 

IV. Fourier-transform, Nuclear Magnetic Resonance Spectroscopy. 43... 

Comparing FTMS with Fourier transform nuclear magnetic resonance (FTNMR), we first notice how the frequency range to be covered here is very large. Second, relaxation in NMR is invariably linked with the interaction among liquid-phase or solid-phase molecules. In the gas phase, relaxation depends on the vacuum and on the stability of the ions being observed. If the vacuum is not sufficient, collisions slow the ions and their movement becomes incoherent. The observation of an ion is also limited to its lifetime. 

Andrewartha KA, Brownlee RTC, Phillips DR. Fourier-transform nuclear magnetic resonance determination of degree of hydration of dilute solutions of biopolymers. Arch. Biochem. Biophys. 1978 185 423-428. 

FI. Farrar, T. C., Pulsed and Fourier transform nuclear magnetic resonance spectroscopy. Anal. Chem. 42, 109A-112A (1970). 

D. Doddrell and A. Allerhand, Study of anomeric equilibria of ketoses in water by natural-abundance Carbon-13 Fourier Transform Nuclear Magnetic Resonance. D-Fmctose and D-Turanose, J. Am. Chem. Soc., 93 (1971) 2779-2781. 

A. G. Redfield and R. K. Gupta, Pulsed-Fourier-Transform Nuclear Magnetic Resonance Spectrometer, J. S. Waugh, ed. (Academic Press, New York, 1971), pp. 81-115. 

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