November 2013

Extraction and separation of Ni(II) from by functionalized graphene oxide with covalently linked porphyrin (GO–H2NP) adsorbed on surfactant coated C18

A novel, simple, sensitive and effective method has been developed for preconcentration of Ni (II) on functionalized Graphene oxide with covalently linked porphyrin (GO–H2NP) solid-phase extraction adsorbent. The stability of a chemical (GO–H2NP), especially in concentrated hydrochloric acid, was then used as a recycling and pre-concentration reagent. The method is based on selective chelation of Ni(II) on...

Author(s): Ali Moghimi, Mahdi Alijanianzadeh and Rezvan Pourahmad

November 2013

Microstructure contradistinction for indirect/direct desulfurization product layer of limestone particle in coal-fired flue gas

The micro morphology of limestone sorbent is a key for improving the SO2 removal efficiency in the coal-fired power plant. The tube furnace system was built for imitating the indirect desulfurization reaction in traditional boiler atmosphere (65%N2, 15%CO2, 4.7%O2, 15%H2O, 0.3%SO2) and the direct desulfurization reaction in oxygen-fired atmosphere (80%CO2, 4.7%O2, 15%H2O, 0.3%SO2). The reacted limestone particle samples...

Author(s): Jian-yu Shang, Zhong-liang Liu and Chun-bo Wang

November 2013

Didecanoate compound: Isolated from Momordica charantia Linn. seeds from Nigeria

The seeds of Momordica charantia were extracted with hexane, ethyl acetate and 95% ethanol successively by percolation and concentrated at 37°C. Fractions 19-21 and 247 gave two compounds. However, only one has been elucidated to be 4a-phorbol-12, 13-didecanoate using the state- of –art- tools of spectrometry. The phytochemical screening of seeds of M. charantia showed the presence of...

Author(s): Oragwa Leonard N., Olajide Olutayo O., Efiom Otu O. and Okwute Simon K.