1,720,965 research outputs found
Meso-alpo Prepared By Thermal Decomposition Of The Organic-inorganic Composite: A Ftir Study
No full textMesporous ALPO was synthesised using cetyltrimethylammonium bromide (CTAB) as a structure-directing agent. FTIR spectroscopy was used to follow the formation of the ALPO mesophase by thermal decomposition of the aluminophosphate/surfactant composite and NH3 was used as probe molecule to monitor the surface acidity of the product.141417422Estermann, M., McCuster, L.B., Baerlocher, C., Merrouche, A., Kessler, H., (1991) Nature, 352, p. 320Davis, M.E., Saldarriaga, C., Montes, C., Garces, J., Crowder, C., (1998) Nature, 331, p. 698Kimura, T., Sugahara, Y., Kuroda, K., (1998) Micropor. Mesopor. Mater., 22, p. 115Masson, N.C., Pastore, H.O., (2001) Micropor. Mesopor. Mater., 44, p. 173Oliveira, E.C., Masson, N.C., Mascarenhas, A.J.S., Pastore, H.O., Colloids and SurfacesPeña, M.L., Dellarocca, V., Rey, F., Corma, A., Coluccia, S., Marchese, L., (2001) Microporous Mesoporous Mat., 44-45, p. 345Marchese, L., Gianotti, E., Maschmeyer, T., Martra, G., Coluccia, S., Thomas, J.M., (1997) Il Nuovo Cimento, 19 D, p. 1707Gianotti, E., Dellarocca, V., Martra, G., Marchese, L., Coluccia, S., Maschmeyer, T., in preparatio
Ti Ions in Mesoporous Silicas: Synthesis, Spectroscopic Characterization and Catalytic Activity
No full textAcidity Of Mesoporous Aluminophosphates And Silicas Mcm-41. A Combined Ftir And Uv-vis-nir Study
No full textThe surface acidity of new mesoporous aluminophosphates, silicoaluminophosphates and [Si]-MCM-41 was studied by means of FTIR and DR UV-Vis-NIR spectroscopies using ammonia as probe molecule. Moreover, a novel Ti-grafted mesoporous ALPO was synthesised and studied by the use of DR-UV-Vis spectroscopy.142 B14191426Wilson, S.T., Lok, B.M., Messina, C.A., Cannan, T.R., Flanigen, E.M., (1982) J. Am. Chem. Soc., 104, p. 1146Estermann, M., McCuster, L.B., Baerlocher, C., Merrouche, A., Kessler, H., (1991) Nature, 352, p. 320Davis, M.E., Saldarriaga, C., Montes, C., Garces, J., Crowder, C., (1998) Nature, 331, p. 698Kimura, T., Sugahara, Y., Kuroda, K., (1998) Micropor. Mesopor. Mater., 22, p. 115Masson, N.C., Pastore, H.O., (2001) Micropor. Mesopor. Mater., 44, p. 173Maschmeyer, T., Rey, F., Sankar, G., Thomas, J.M., (1995) Nature, 378, p. 159Kresge, C.T., Leonowicz, M.E., Vartuli, W.J., Beck, J.S., (1992) Nature, 359, pp. 710MPeña, L., Dellarocca, V., Rey, F., Corma, A., Cosuccia, S., Marchese, L., (2001) Micron. Mesop. Mater., 44-45, p. 345Little, L.H., (1966) Infrared Spectra of Adsorbed Species, , Academic press, New YorkPuurunen, R.L., Root, A., Haukka, S., Iiskola, E.I., Lindblad, M., Krause, A.O.I., (2000) J. Phys. Chem. B, 104, p. 6599Marchese, L., Gianotti, E., Maschmeyer, T., Martra, G., Coluccia, S., Thomas, J.M., (1997) Il Nuovo Cimento, 19 D, p. 1707Gianotti, E., Dellarocca, V., Marchese, L., Martra, G., Coluccia, S., Maschmeyer, T., in preparationSinclair, P.E., Sankar, G., Catlow, C.R.A., Thomas, J.M., Maschmeyer, T., (1997) J. Phys. Chem. B, 101, p. 4232Marchese, L., Maschmeyer, T., Gianotti, E., Coluccia, S., Thomas, J.M., (1997) J. Phys. Chem. B, 101, p. 883
NH3 adsorption on Mesoporous Silicas MCM-41 and Ti-MCM-41: A Combined FTIR and UV-Vis Study
No full textNH3 adsorption on MCM-41 and Ti-grafted MCM-41. FTIR, DR UV-Vis-NIR and photoluminescence studies
No full text
Synthesis and characterization of MgB2 thick films obtained by electrophoresis technique
No full textUnequivocal Evidence of the Presence of Titanols in Ti-MCM-48 Mesoporous Materials. A Combined Diffuse Reflectance UV-Vis-Nir and 29Si-MAS-NMR Study
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
- …
