the potential of carbon nanotubes (cnt) supported cobalt catalysts for fischer-tropsch (ft) reaction is shown. using the wet impregnation method cobalt on carbon nanotubes catalysts were prepared with cobalt loading varying from 15 to 45 wt. %. the catalysts are characterized by different methods including: bet physisorption, x-ray diffraction, hydrogen chemisorption, and temperature-programmed...

The learning styles of students vary both among individuals and across different disciplines they choose to study. In higher education, academic discipline appears be a key factor influencing students’ distinctive styles. This study, which aims determine the dominant models talented pre-service teachers, was designed with survey model. study group research consisted 1019 volunteer teachers who ...

the interaction of the external donor (propyltrimethoxysilane - ptms) with titanium-magnesium catalysts (tmcs) containing dibutylphthalate (dbp) as internal donor, which were prepared in different ways, was studied by chemical analysis and infrared diffuse reflectance spectroscopy (drifts). the chemical composition of the catalysts after their interaction with heptane solutions of ptms, ptms/al...

Hierarchical Catalysts In article number 2106436, Liangbing Hu and co-workers report an interface engineering strategy to improve the stability of multi-elemental alloy (MEA) nanoparticles on a carbon substrate. The MEA-oxide–carbon hierarchical catalysts synthesized by rapid high-temperature shock method demonstrate excellent thermal electrochemical stabilities, hold great promise for various ...

the aim of this study was to investigate the relationship between test anxiety with mental health and implicit-explicit self esteem. the comparison of these constructs between talented and normal schools students was assessed as well.  112 talented school male students and 96 normal school male students from khorasan razavi were selected by convenience sampling and completed the package of inst...

Recent developments in catalysts have enhanced the potential for the utilisation of carbon dioxide as a chemical feedstock. Using the appropriate energy efficient catalyst enables a range of chemical pathways leading to desirable products. In doing so, CO2 provides an economically and environmentally beneficial source of C1 feedstock, while improving the issues relating to security of supply th...