ethylene polymerization was carried out using phillips chromium catalyst based on silica supports such as silicaaerogel, sio2 (grace 643), and titanium modified sio2 (g 643), and the results were compared with othercatalysts based on sio2 (aldrich), sba-15(hex), sba-15(sp) and mcm-41. a combination of tga, dsc, xrd,nitrogen adsorption, sem, icp, ftir and other analyses were used to characterize...

Ethylene polymerization was carried out using Phillips chromium catalyst based on silica supports such as silica aerogel, SiO2 (Grace 643), and titanium modified SiO2 (G 643), and the results were compared with other catalysts based on SiO2 (Aldrich), SBA-15(Hex), SBA-15(Sp) and MCM-41. A combination of TGA, DSC, XRD, nitrogen adsorption, SEM, ICP, FTIR and other analyses were used to character...

Johan Cilliers relates that Grace upon came to existence in his experience of "being retired late", where he could "ponder the meaning life from a different angle" (xi). On one hand, implies does not have purpose academic contemplation. other it takes no time interaction with realise is indeed thoroughly grounded contemplating sophisticated theological manner.

The aims of the “Visualization in Parallel” (Vipar) project is to produce a comprehensive environment for the development of parallel visualization modules in systems such as the Application Visualization System (AVS), Iris Explorer, IBM Data Explorer (DX) and Khoros. This paper presents an overview of the project and describes the libraries developed to support the first phase of the work whic...

BACKGROUND Fibrinolytic therapy is the main reperfusion therapy for most STEMI patients in several countries. Current practice guidelines recommended routine early pharmacoinvasive (within 3-24 h after successful fibrinolysis, however it cannot be performed in timely fashion due to limitation of PCI-capable hospitals. This study aimed to evaluate the prognostic utility of the GRACE score in pat...

whence she had come nor whither she was bound, for she had no record of any kind with her. When she was questioned her vocabulary seemed to consist solely of head shakings and a few utterly unintelligible syllables. It is not recorded how Grace happened to be thrust into a second grade that first day. But it was the second grade teacher who began to complain, a few days later, of "that little n...