Author:Ryan-Keogh, Thomas J; Thomalla, Sandy JDate:May 2020Chlorophyll fluorescence, primarily used to derive phytoplankton biomass, has long been an underutilized source of information on phytoplankton physiology. Diel fluctuations in chlorophyll fluorescence are affected by both photosynthetic ...Read more
Author:Agboola, BO; Pillay, J; Makgopa, K; Ozoemena, KIDate:Sep 2010The redox activities of water-soluble iron(II) tetrasulfophthalocyanine (FeTSPc) and single-walled carbon nanotube-poly(m-aminobenzene sulfonic acid) (SWCNT-PABS) adsorbed on a gold surface precoated with a self-assembled monolayer (SAM) of ...Read more
Author:Akinbulu, IA; Ozoemena, KI; Nyokong, TDate:Oct 2011Molecular thin films of manganese (SAM-2), iron (SAM-3), and cobalt (SAM-4) phthalocyanine complexes, non-peripherally tetra-substituted with benzylmercapto, were formed on polycrystalline gold disc electrode by selfassembly technique. Surface ...Read more
Author:Makgwane, Peter R; Ray, SSDate:Mar 2015A highly active and magnetically recyclable nanostructured copper–iron oxide (CuFe) catalyst has been synthesized for hydroxylation of benzene to phenol under mild reaction conditions. The obtained catalytic results were correlated with the ...Read more
Author:Pityana, Sisa L; Rossouw, RDate:Oct 2008The aim of this work was to produce crack-free thin surface layers consisting of binary (Al-Ni, Al-Fe) and ternary (Al-Ni-Fe) intermetallic phases by means of a high power laser beam. The laser surface alloying was carried out by melting Fe ...Read more
Author:Tshilombo, KG; Pistorius, PCDate:2007The authors argue the possibility of using an oxygen probe to follow iron removal during converting, if local equilibrium is established between iron in the matte and the iron oxides in the fayalitic slag. The oxygen activity is expected to ...Read more
Author:Vaid, A; Ranjan, R; Verma, G; Smythe, WA; Hoppe, HC; Sharma, PDate:Mar 2010phosphorylated phosphoinositides (PIPs) are potent second messengers, which trigger a wide variety of signaling and trafficking events in most eukaryotic cells. However, the role and metabolism of PIPs in malaria parasite Plasmodium have ...Read more
Author:Nkosi, SS; Mwakikunga, Bonex W; Sideras-Haddad, E; Forbes, ADate:Jun 2013Highly crystalline nanospherical iron–platinum systems were produced by 248 nm laser irradiation of a liquid precursor at different laser fluences, ranging from 100–375 mJ/cm2. The influence of laser intensity on particle size, iron composition, ...Read more