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Abstract
Water adsorption at temperatures of 286 and 296 K on silicalite-I, ZSM-5 (Si/Al=16), ZSM-48 (Si/Al=50) and AlPO4-5 is followed by gravimetry with a quasi-equilibrium continuous adsorptive introduction. The results show that all of these samples are characterized by a continuous distribution of strongly energetic water adsorption sites (from 60 to 120 kJ·mol−1) for which the adsorption is irreversible at the experimental temperature. This probably justifies the presence of hysteresis on desorption at very low relative pressure values. Adsorption of water in these systems firstly occurs by site. This is then followed by cluster formation and it is suggested that it is the ability of the adsorbent to build up these clusters within the microporous structure which determines intracrystalline uptake. It is put forward that the zeolites, silicalite-I and ZSM-5, do not accommodate cluster formation within its microporous network. However, an external flexible microporous structure, containing Lewis sites, may be present for large crystals. This flexible secondary structure may then be able to opened (swelled) at high relative pressures. On the other hand, for the aluminophosphate AlPO4-5, it is believed that a change in the aluminium coordination on the formation of a crystal hydrate together with capillary condensation results in a large step in the adsorption isotherm, which is itself preceded by a smaller step, revealing a brutal densification of the adsorbed phase.
Abstract
A silico alumino phosphate with AFI structure (SAPO-5) was prepared in a two-phase medium and characterized by XRD, followed by the addition of TEA+. The kinetics of the TEA+/SAPO-5 thermal decomposition reaction was studied by isothermal and dynamic thermogravimetry. Two kinetic models, D3 and D4 based on diffusion processes were found as best to fit the isothermal data. On the other hand, the best fit for the dynamic data is the F1 first order reaction model. According to the apparent activation energy values, the use of the dynamic method indicates a higher temperature dependence than the isothermal method.
251 299 Kutscher, Silvia, Johanna Mattissen and Anke Wodarg. 1995. Das Mut’afi-Lazische. Köln: Universität zu Köln. Wodarg A
vibrating platform, the animals were rotated among the stalls [ 16 ], with one stall always remaining empty. Functionality was assessed by the Achilles tendon Functional Index (AFI) [ 17 ]. The AFI measurements were performed on the following days: one day
collaboration by comparing the number of co-authorship between the two countries to the square root of the product of total publication made by each country. OCH is frequently used to map the international collaboration network (Zitt et al. 2000 ). AFI
Factors associated with postural control in nursing home residents
Oral presentation at the 13th Conference of the Hungarian Medical Association of America – Hungary Chapter (HMAA-HC) at 30–31 August 2019, in Balatonfüred, Hungary
physiological profile assessments . Age Ageing 2005 ; 34 ( 6 ): 567 – 71 . 10.1093/ageing/afi178 14. Dodds RM , Syddall HE , Cooper R , Benzeval M , Deary IJ , Dennison EM , Grip strength across the life course: normative data from twelve
intervention in a falls clinic using the Timed Up and Go test and physiological profile assessments . Age Ageing . 2005 ; 34 ( 6 ): 567 – 71 . 10.1093/ageing/afi178 16
-incompatible when ISI is > 0.2 but < 1 and fully self-incompatible when ISI is < 0.2 or 0. An auto-fertility index (AFI) was also calculated from fruit set and seed production through autonomous self-pollination/hand self-pollination (Eckert et al . 2006, Lloyd and
this paper. References 1. Murphy , C. , Veron , M. , Cullen , M. : Intravenous immunoglobulin for resistant Clostridium difficile infection . Age Ageing 35 , 85 – 86 ( 2006 ). 16303776 10.1093/ageing/afi212 2. Hall , I. C. , O’Toole , E
seriously. The 2020 CoE Resolution points out that ‘academic freedom and autonomy are not properly taken into account in any university rankings today, making some higher educational institutions of countries with the lowest scores of AFI appear to excel
