Download e-book for kindle: Annual Reports on NMR Spectroscopy, Vol. 28 by I. Ando, G.A. Webb (Eds.)

By I. Ando, G.A. Webb (Eds.)

ISBN-10: 0125053282

ISBN-13: 9780125053280

This choice of stories show the wide purview of NMR and its purposes. The pellucid shows supplied contain debts on program of NMR spectroscopy to sciences and applied sciences of glassand ceramics; high-resolution solid-state NMR reports on ceramics; NMR stories of zeolite; NMR experiences of higher-order constructions of good polymers; and natural skinny movies. Taken including studies in different volumes of this sequence, the current accountsably exhibit that NMR is facile princeps by way of challenge fixing in so much parts of technology, together with the clinical sciences. learn more... summary: This selection of studies show the broad purview of NMR and its functions. The pellucid displays supplied contain money owed on program of NMR spectroscopy to sciences and applied sciences of glassand ceramics; high-resolution solid-state NMR reports on ceramics; NMR reviews of zeolite; NMR experiences of higher-order constructions of strong polymers; and natural skinny movies. Taken including stories in different volumes of this sequence, the current accountsably reveal that NMR is facile princeps in terms of challenge fixing in such a lot parts of technological know-how, together with the scientific sciences

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R. Grimmer, M. Magi, M. H b e r t , H. Stade, A. Samoson, W. Wieker and E. Lippmaa, Phys. Chem. Glasses, 1984, 25, 105. 21. R. -U. Chun, H. Goretzki and M. Sammet, J. Non-Cryst. Solids, 1980, 42, 49. 22. H. Kawazoe, M. Takagi, T. Kanazawa and I. Yasui, Glasrechn. , 1983, 56K, 1035. 23. P. C. Taylor, J. F. Baugher and H. M. Kriz, Chem. , 1975,75,203. 24. J . F. Emerson, P. E. Stallworth and P. J . Bray, J . Non-Cryst. Solids, 1989, 113, 253. 25. E. LeII, N. J. Kreidl and J. R. Hensler, in Progress in Ceramic Science, Vol.

8ms duration and a hard 180" pulse of 54ps duration were employed in the imaging sequence. TE, defined as the time from the centre of the soft 90" pulse to mid-echo, was 8ms, and TR, the delay between repetitions, was set to 500ms. Sixteen scans were acquired at each of 256 phase encoding steps, for a total acquisition time of approximately 34 min per image. 6 X 10d4T/cm and acquisition of a 256 x 256 data point matrix. 8 mm. APPLICATION OF NMR SPECTROSCOPY TO GLASSES AND CERAMICS 25 Fig. 14. 8mm-thick slices of the sample, spaced 4 mrn apart.

1. Structure of kaolins Kaolins, A12Si205(OH)4, are layered aluminosilicates with a dioctahedral 1:1 layer structure consisting of an octahedral aluminium hydroxide sheet and a tetrahedral silica sheet. Kaolinite, dickite, and nacrite belong to the kaolins, and the layer stacking manner is different from each other. Figure 2 shows the structure of kaolinite. The 29Si chemical shift of kaolinite is about -91ppm from pure tetramethylsilane, which is attributed to Si04 tetrahedra linked with three S O 4 tetrahedra and having a non-bridging oxygen, denoted as Q3(OAl).

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Annual Reports on NMR Spectroscopy, Vol. 28 by I. Ando, G.A. Webb (Eds.)


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