Hydration spectroscopic studies

X-ray photoelectron spectroscopic study of the spontaneously passive amorphous Fe-10Cr-13P-7C alloy in 1 N HCl revealed that the passive film consists of Cr, 0 , OH" and HjO, and hence the passive film has been called a passive hydrated chromium oxyhydroxide film (CrO (OH)j Subsequent investigations have revealed that... 

Recent work by Stipp and Hochella (1991) provide evidence for the processes of reconfiguration and hydration at the calcite surface. These results may provide a basis for future spectroscopic studies of trace metal adsorption and subsequent solid-solution formation. 

When hydrated phospholipids (containing about 50% water) are squeezed between two flat quartz plates, one can frequently obtain highly ordered, uniaxial, parallel arrays of about 100 to 10,000 bilayers (see, for example, Ref. 33). These lipid multilayers are ideal for a number of spectroscopic studies of phospholipids. Most of the membrane work described in the present work has been carried out using liposomes and oriented multilayers. 

N(I) Compounds. Hydration of nrtrogen(I) oxide, NjO to hyponitrous arid, H2N2O2, is not possible. However, the latter decomposes (in three steps) to yield the former, which is thus its anhydride. Spectroscopic studies indicate a linear structure for N50, resonating between... 

Fukuhara, K., Tachikake, M. (1995), Raman Spectroscopic Study of the Hydrates of 18-Crown-6, J. 

Williams JM (1976) Spectroscopic studies of hydrated proton species, H+(H20)n in crystalline compounds. Chap 14. In Schuster P, Zundel G, Sandorfy C (eds) The hydrogen-bond, vol II. North Holland, Amsterdam, pp 655-682... 

Falk M, Hartmann KA Jr, Lord RC, (1963) Hydration of deoxyribonucleic acid. III. A spectroscopic study of the effect of hydration on the structure of deoxyribonucleic acid. J Am Chem Soc 85 391-394... 

Hansen, J. R. and Yellin, W. NMR and infrared spectroscopic studies of stratum comeum hydration. In Water Structure at the Water-Polymer Interface. H. H. G. Jellinek, ed. Plenum Publishing New York, 1972, pp. 19-28. 

Liu X, Zhang G, Thomas JK. (1997) Spectroscopic studies of electron and hole trapping in zeolites Formation of hydrated electrons and hydroxyl radicals. JPhys Chem B 101 2182-2194. 

NMR success motivated other spectroscopic studies to measure the hydrate phase directly. This work represented an experimental departure, because previously only the fluid phases (vapor and liquid(s)) were measured, and any experimental error was incorporated in the solid-phase model of van der Waals and Platteeuw, However, with modem solid-phase measurements, the errors in the van der Waals and Platteeuw model could be clarified and corrected. Raman spectroscopy and diffraction (X-ray and neutron, supplemented by Rietveld analysis ) have been successful the first method to measure the relative occupation of single guest cages, and the second to extend the work to hydrate isothermal, adiabatic, and isobaric compressibilities. As shown in Section 4, these measurements combine with spectroscopic hydrate phase measurements to enable improvements of the model. 

Electron spectroscopic studies by Coughlan show that in 27% Ni " L the nickel is located in the main tunnels of the hydrated zeolite, but on dehydration Ni + migrates to less accessible sites as indicated by increasing inaccessibility to both water and ammonia. In contrast to this, migration of Ni " into hexagonal prisms in Y zeolite could be reversed by admitting ammonia to the system. ... 

We have claimed that the hydrate generated in the ternary system of H2, CO2 and water (without THF) can be regarded as the pure CO2 hydrate crystal (s-1) from Raman spectroscopic study. The gas hydrate crystal generated in H2 + CO2 + THF + water mixed system is the s-II. The D-cage of s-ll is somewhat smaller than that of s-I. Therefore, it is possible that the H2 molecule occupies the D-cage to generate H2 + CO2 + THF mixed hydrate crystal. 

Raman Spectroscopic Study on Single Crystals of Structure-H hydrate... 

Spectroscopic studies on periodate-oxidized ribonucleosides and ribonucleotides, which are used for affinity columns and for affinity labelling, inter alia, suggest that they exist in solution in hydrated and condensed forms, and not as the free dialdehydes (Scheme 4). Periodate-oxidized UDP has been used for affinity labelling of... 

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