African Evaluation Database

9120 records found

Source	Electronic ID	Title	Authors	Publication Year	Source Title	Volume	Issue	DOI	Affiliations	Authors with Affiliations	Abstract	Author Keywords	Index Keywords	Funding Details
Scopus	2-s2.0-77952825265	Monolayer-protected clusters of gold nanoparticles: Impacts of stabilizing ligands on the heterog...	Pillay J., Ozoemena K.I., Tshikhudo R.T., Moutloali R.M.	2010	Langmuir	26	11	10.1021/la904463g	Department of Chemistry, University of Pretoria, Pretoria 0002, South Africa; Advanced Materials ...	Pillay, J., Department of Chemistry, University of Pretoria, Pretoria 0002, South Africa, Advance...	Surface electrochemistry of novel monolayer-protected gold nanoparticles (MPCAuNPs) is described....	None	Aqueous medium; Ascorbic acids; Concentration of; COOH group; Electrocatalytic; Electron-transfer...	None	View
Scopus	2-s2.0-77953666872	Confidence versus performance as an indicator of the presence of alternative conceptions and inad...	Potgieter M., Malatje E., Gaigher E., Venter E.	2010	International Journal of Science Education	32	11	10.1080/09500690903100265	Department of Chemistry, University of Pretoria, Pretoria 0002, South Africa; Department of Educa...	Potgieter, M., Department of Chemistry, University of Pretoria, Pretoria 0002, South Africa; Mala...	This study investigated the use of performance-confidence relationships to signal the presence of...	Alternative conceptions; Confidence; Mechanics; Performance; Rasch model	None	None	View
Scopus	2-s2.0-84888353954	Investigation of the crystalline phase morphology of a β-nucleated impact polypropylene copolymer	Motsoeneng T.S., Luyt A.S., Van Reenen A.J.	2014	Journal of Applied Polymer Science	131	4	10.1002/app.39923	Department of Chemistry, University of the Free State (Qwaqwa Campus), Phuthaditjhaba, South Afri...	Motsoeneng, T.S., Department of Chemistry, University of the Free State (Qwaqwa Campus), Phuthadi...	This study covers the preparation and the characterization of β-nucleated impact polypropylene co...	copolymers; crystallization; differential scanning calorimetry (DSC); kinetics; X-ray	Chemical interactions; Crystallization behavior; Impact polypropylene copolymer; Nonisothermal cr...	None	View
Scopus	2-s2.0-84876586787	High-performance aqueous asymmetric electrochemical capacitors based on graphene oxide/cobalt(ii)...	Lekitima J.N., Ozoemena K.I., Jafta C.J., Kobayashi N., Song Y., Tong D., Chen S., Oyama M.	2013	Journal of Materials Chemistry A	1	8	10.1039/c2ta01325h	Department of Chemistry, University of Pretoria, Pretoria 0002, South Africa; Energy Materials, M...	Lekitima, J.N., Department of Chemistry, University of Pretoria, Pretoria 0002, South Africa; Ozo...	A novel asymmetric electrochemical capacitor (AEC) with high energy and power densities has been ...	None	Capacitors; Electric resistance; Hybrid vehicles; Electrochemical capacitor; Equivalent series re...	None	View
Scopus	2-s2.0-84929992405	Oxygen reduction reaction at MWCNT-modified nanoscale iron(ii) tetrasulfophthalocyanine: Remarkab...	Fashedemi O.O., Ozoemena K.I.	2015	RSC Advances	5	29	10.1039/c5ra03133h	Department of Chemistry, University of Pretoria, Pretoria, South Africa; Energy Materials, Materi...	Fashedemi, O.O., Department of Chemistry, University of Pretoria, Pretoria, South Africa; Ozoemen...	A nanoscale iron(ii) tetrasulfophthalocyanine (nanoFeTSPc) catalyst obtained by co-ordinating wit...	None	Alkaline fuel cells; Catalysts; Electrolytic reduction; Fuel cells; Iron compounds; Methanol; Nan...	None	View
Scopus	2-s2.0-84925047350	Electro-oxidation of ethylene glycol and glycerol at palladium-decorated FeCo@Fe core-shell nanoc...	Fashedemi O.O., Miller H.A., Marchionni A., Vizza F., Ozoemena K.I.	2015	Journal of Materials Chemistry A	3	13	10.1039/c5ta00076a	Department of Chemistry, University of Pretoria, Pretoria, South Africa; Istituto di Chimica Dei ...	Fashedemi, O.O., Department of Chemistry, University of Pretoria, Pretoria, South Africa; Miller,...	Half-cell reactions and alkaline direct ethylene glycol and glycerol fuel cells (DEGFC and DGFC) ...	None	Alkaline fuel cells; Alkalinity; Direct alcohol fuel cells (DAFC); Electrocatalysis; Electrooxida...	None	View
Scopus	2-s2.0-77955796764	Inaccuracy of self-evaluation as additional variable for prediction of students at risk of failin...	Potgieter M., Ackermann M., Fletcher L.	2010	Chemistry Education Research and Practice	11	1	10.1039/c001042c	Department of Chemistry, University of Pretoria, South Africa; Department of Statistics, Universi...	Potgieter, M., Department of Chemistry, University of Pretoria, South Africa; Ackermann, M., Depa...	Early identification of students at risk of failing first-year chemistry allows timely interventi...	Chemistry; Logistic regression; Overconfidence; Prediction; Prediction model; Predictor variables...	None	None	View
Scopus	2-s2.0-58149100167	The impacts of anthropogenic factors on the environment in Nigeria	Madu I.A.	2009	Journal of Environmental Management	90	3	10.1016/j.jenvman.2008.08.009	Department of Geography, University of Nigeria, Nsukka 410001, Nigeria	Madu, I.A., Department of Geography, University of Nigeria, Nsukka 410001, Nigeria	Generally speaking, there has been a consensus on the primary drivers of anthropogenic induced en...	Anthropogenic drivers; Ecological elasticity; Environment and development; Environmental impacts;...	anthropogenic effect; carbon dioxide; carbon emission; developing world; elasticity; environmenta...	None	View
Scopus	2-s2.0-84940259267	Structure and properties of a β-nucleated polypropylene impact copolymer	Motsoeneng T.S., van Reenen A.J., Luyt A.S.	2015	Polymer International	64	2	10.1002/pi.4778	Department of Chemistry, University of the Free State (Qwaqwa Campus), Phuthaditjhaba, South Afri...	Motsoeneng, T.S., Department of Chemistry, University of the Free State (Qwaqwa Campus), Phuthadi...	The effect of a β-nucleating agent (β-NA) on the properties and structure of a commercial impact ...	Impact polypropylene copolymer; Mechanical properties; Thermal stability; β-nucleation	Copolymers; Mechanical properties; Propylene; Thermodynamic stability; Chemical compositions; Imp...	None	View
Scopus	2-s2.0-84940197167	ICP-OES monitoring of the instability of [OsCl<inf>6</inf>]2- and Evaluation of [OsO<inf>2</inf>(...	Chiweshe T.T., Purcell W., Venter J.A.	2015	Bulletin of the Chemical Society of Japan	88	8	10.1246/bcsj.20150025	Department of Chemistry, University of the Free State, Nelson Mandela Drive, Bloemfontein, South ...	Chiweshe, T.T., Department of Chemistry, University of the Free State, Nelson Mandela Drive, Bloe...	A spectrometric method using inductively coupled plasma optical emission spectrometry (ICP-OES) f...	None	Calibration; Cesium; Inductively coupled plasma; Optical emission spectroscopy; Plasma diagnostic...	NRF, Neurosurgical Research Foundation	View
Scopus	2-s2.0-84856234669	Binuclear Pd-methyl complexes of N,N′-{1, n}-alkanediyl- bis(pyridinyl-2-methanimine) ligands (n ...	Sibanyoni J.M., Bagihalli G.B., Mapolie S.F.	2012	Journal of Organometallic Chemistry	700	None	10.1016/j.jorganchem.2011.11.019	Department of Chemistry, University of the Western Cape, Bellville, South Africa; Department of C...	Sibanyoni, J.M., Department of Chemistry, University of the Western Cape, Bellville, South Africa...	A series of bifunctional ligands of the type N,N′-{1, n}-alkanediyl-bis(pyridinyl-2-methanimine) ...	Diimine complexes; N,N′-{1,n}-alkanediyl-bis(pyridinyl-2-methanimine) ligands; Pd-methyl complexe...	Active catalyst; Bifunctional ligand; Catalyst precursors; Catalysts precursors; Counterions; Dii...	None	View
Scopus	2-s2.0-44349099730	Design and evaluation of anacardic acid derivatives as anticavity agents	Green I.R., Tocoli F.E., Lee S.H., Nihei K.-i., Kubo I.	2008	European Journal of Medicinal Chemistry	43	6	10.1016/j.ejmech.2007.08.012	Department of Chemistry, University of the Western Cape, P/Bag X17, Bellville, 7530, South Africa...	Green, I.R., Department of Chemistry, University of the Western Cape, P/Bag X17, Bellville, 7530,...	On the basis of antibacterial anacardic acids, 6-pentadecenylsalicylic acids, isolated from the c...	6-(4′,8′-Dimethylnonyl)salicylic acid; Anacardic acid; Antibacterial activity; Streptococcus mutans	anacardic acid; salicylic acid derivative; antibacterial activity; article; cashew nut; dental ca...	None	View
Scopus	2-s2.0-84861130274	Performance and kinetics of Pt-CNT catalyst electrodes in a PEM fuel cell	Afolabi A.S., Abdulkareem A.S., Iyuke S.E., Pienaar H.C.V.Z.	2012	Journal of Materials Research	27	11	10.1557/jmr.2012.71	Department of Civil and Chemical Engineering, College of Science, Engineering and Technology, Uni...	Afolabi, A.S., Department of Civil and Chemical Engineering, College of Science, Engineering and ...	This study investigated the performance of membrane electrode assembly (MEA) fabricated with vari...	None	Catalyst-electrodes; Constant conditions; Membrane electrode assemblies; Overpotential; PEM fuel ...	None	View
Scopus	2-s2.0-29244454556	Furoyl and thiophene carbonyl linker pyrazolyl palladium(II) complexes - Synthesis, characterizat...	Ojwach S.O., Tshivhase M.G., Guzei I.A., Darkwa J., Mapolie S.F.	2005	Canadian Journal of Chemistry	83	42528	10.1139/v05-092	Department of Chemistry, University of the Western Cape, Private Bag X17, Bellville 7535, South A...	Ojwach, S.O., Department of Chemistry, University of the Western Cape, Private Bag X17, Bellville...	Reactions of 2-furoyl chloride and 2-thiophene carbonyl chloride with substituted pyrazoles produ...	Ethylene oligomerization; Furoyl and thiophene carbonyl linker pyrazolyl compounds; Palladium com...	Ethylene; Infrared spectroscopy; Nuclear magnetic resonance; Oligomers; Polymerization; Single cr...	None	View
Scopus	2-s2.0-84874962807	Preparation and evaluation of cucumeropsis mannii naud. Seed oil metallic soaps as driers in glos...	Essien E.A., Umoren S.A., Essien E.E., Udoh A.P.	2012	Journal of Materials and Environmental Science	3	3	None	Department of Chemistry, University of Uyo, P. M. B. 1017, Uyo, Nigeria	Essien, E.A., Department of Chemistry, University of Uyo, P. M. B. 1017, Uyo, Nigeria; Umoren, S....	The physicochemical properties and fatty acid composition of Cucumeropsis mannii (egusi, melon) s...	Cucumeropsis mannii; Gloss paint; Linoleic acid; Metallic soaps; Seed oil	None	None	View
Scopus	2-s2.0-52649159267	Evaluation of the effect of azo group on the biological activity of 1-(4-Methylphenylazo)-2-naphthol	Mkpenie V., Ebong G., Obot I.B., Abasiekong B.	2008	E-Journal of Chemistry	5	3	None	Department of Chemistry, University of Uyo, P. M. B. 1017, Uyo, Nigeria; Department of Science an...	Mkpenie, V., Department of Chemistry, University of Uyo, P. M. B. 1017, Uyo, Nigeria; Ebong, G., ...	Azo-2-naphthol and 2-naphthol were tested against five microorganisms: Staphylococcus aureus, Esc...	2-Naphthol; Antibacterial activity; Azo compound; p-Toluidine	None	None	View
Scopus	2-s2.0-84876473966	Evaluation of proximate composition, mineral element and anti-nutrient in almond (Terminalia cata...	Akpakpan A.E., Akpabio U.D.	2012	Research Journal of Applied Sciences	7	9	10.3923/rjasci.2012.489.493	Department of Chemistry, University of Uyo, P.M.B. 1017, Uyo, Akwa Ibom State, Nigeria	Akpakpan, A.E., Department of Chemistry, University of Uyo, P.M.B. 1017, Uyo, Akwa Ibom State, Ni...	Proximate composition, mineral elements, anti-nutrients (toxicants) and lipid characteristics wer...	Almond seed; Anti-nutrients; Mineral elements; Oil characteristic; Proximate composition	None	None	View
Scopus	2-s2.0-23844552375	Damage, deterioration and the long-term structural performance of cooling-tower shells: A survey ...	Bamu P.C., Zingoni A.	2005	Engineering Structures	27	12 SPEC. ISS.	10.1016/j.engstruct.2005.04.020	Department of Civil Engineering, University of Cape Town, Rondebosch 7701 Cape Town, South Africa	Bamu, P.C., Department of Civil Engineering, University of Cape Town, Rondebosch 7701 Cape Town, ...	The last 50 years have seen a gradual shift in trend in research on concrete hyperbolic cooling-t...	Concrete cracking; Cooling towers; Damage modelling; Deterioration phenomena; Durability; Long-te...	Cooling towers; Crack initiation; Defects; Deterioration; Durability; Mathematical models; Perfor...	None	View
Scopus	2-s2.0-84934764742	Biological activities of (E)-N-(CH<inf>3</inf>-substituted-phenyl)-1-phenylmethanimine: Evaluatio...	Mkpenie V.N., Mkpenie I.V., Essien E.E.	2015	Der Pharma Chemica	7	6	None	Department of Chemistry, University of Uyo, Uyo, Nigeria	Mkpenie, V.N., Department of Chemistry, University of Uyo, Uyo, Nigeria; Mkpenie, I.V., Departmen...	Schiff bases with ortho-, meta- and para-methyl substituents were synthesized by thecondensation ...	Antibacterial activity; Antifungal activity; Schiff bases; Substitution effect; Toluidine	2 methylaniline; 3 methylaniline; 4 methylaniline; aniline derivative; antiinfective agent; benza...	None	View
Scopus	2-s2.0-36948998622	Impact of mechanized farming on the heavy metals load of an ultisol located in the Niger Delta Re...	Ebong G.A., Etuk H.S., Essien J.P.	2007	Journal of Applied Sciences	7	20	None	Department of Chemistry, University of Uyo, Uyo, Nigeria; Department of Microbiology, University ...	Ebong, G.A., Department of Chemistry, University of Uyo, Uyo, Nigeria; Etuk, H.S., Department of ...	Top soil samples from a mechanized farm located in Awot Uta, Akwa Ibom State in the Niger Delta R...	Heavy metal; Mechanized farming; Niger Delta; Nigeria	Atomic absorption spectrophotometer; Coefficient of variation; Health implications; Mean concentr...	None	View

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