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, β-unsaturated organic acids as acylating agents is given by Castro et al. [ 5 ]. Bellussi et al. [ 6 ] have studied the liquid phase alkylation of benzene with light olefins. They have reported that H-beta is a more active catalyst than zeolite Y for

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Journal of Thermal Analysis and Calorimetry
Authors: Ana C. R. Melo, Edjane F. B. Silva, Larissa C. L. F. Araujo, Mirna F. Farias, and Antonio S. Araujo

literature for Beta zeolite [ 7 ]. These plans are attributed to structural defects of Beta zeolite. Fig. 1 X-ray powder diffraction pattern H-Beta zeolite Nitrogen adsorption

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Abstract  

This work is focused on the gas and liquid-phase adsorption of pollutants: propanol, 2-butanone, phenol and nicotine onto zeolites (H-BETA, H-ZSM-5, H-MCM-22, and clinoptilolite). Textural properties and origin of zeolites were taken into account as criteria of adsorbents selection. The aldehyde and the ketone were adsorbed in the gas phase using microcalorimetry linked to a volumetric line to evaluate adsorption. Adsorptions in water were carried out for phenol and nicotine and the evolved heats during adsorption were measured by a differential heat flow reaction calorimeter with stirring. Results are discussed in relation with the pore sizes and various interactions which could occur between the adsorbent and the adsorbate.

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Abstract  

With the use of an 80 MeV isochronous cyclotron, a preparation procedure for123I is outlined. The nuclear reaction applied in the process is:

\documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{upgreek} \usepackage{portland,xspace} \usepackage{amsmath,amsxtra} \pagestyle{empty} \DeclareMathSizes{10}{9}{7}{6} \begin{document} $$^{127} I\left( {p,5n} \right)^{123} Xe\xrightarrow[{2.1h}]{{\beta ^ + CE}}^{123} I$$ \end{document}
A liquid target is irradiated and a continuous gas-liquid extraction of parent123Xe is performed. After a short growth time the daughter123I is dissolved and treated for various applications. The radionuclidic purity is very high, only125I is detectable with a maximum of 0.2% to the end of the preparation process. In this production of carrier-free123Xe and123I, the major chemical problem consists of a separation into microquantities. Attempts to find a solution to various technical problems are also described.

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Orvosi Hetilap
Authors: János Tomcsányi, Kinga Jávor, Hrisula Arabadzisz, András Zsoldos, Vince Wagner, and Balázs Sármán

149 2387 2389 Frishman, W. H.: Beta-adrenergic blocker withdrawal. Am. J. Cardiol., 1987, 59 , 26F–32F

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–158. Lawton J.H. Beta diversity on geographic gradients in Britain J. Animal Ecol. 1992 61 151 158

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, Napp A, Schwinger RH: Beta 3-adrenergic stimulation in the human heart: signal transduction, functional implications and therapeautic perspectives. Pharmazie 61, 255–260 (2006) Schwinger R.H

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flora. J. Ecol. 94:110–117. Viers J.H. Beta diversity and the scale-dependence of the productivity-diversity relationship: a test in the Californian serpentine flora

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nanoclusters are supported on H-ZSM-5 and H-Beta of various Si/Al ratios [ 29 ], for the conversion of the non-edible microalgae oil without competing with food production. This approach opens a new route to produce sulfur-free high grade green diesel with the

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