Browsing Faculty of Applied Sciences by Title
Now showing items 32-51 of 209
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A Box-Behnken Design and Response Surface Approach for the Simultaneous Determination of Chromium (III) and (VI) Using Catalytic Differential Pulse Polarography
(ESGhttp://www.electrochemsci.org/papers/vol9/91206751.pdf, 2004-09-29)The present paper describes an optimized Box-Behnken design using a catalytic-differential pulse polarograhic technique for the simultaneous determination of chromium (III) and (VI) in wastewater samples using ammonium ... -
Characterisation of biodiesel from Litsea glutinosa
(2014-08-08)Global warming is a major concern to the world’s population. It is caused by greenhouse gases that result from the burning of fossil fuel. The fossil fuel reserves are rapidly depleting as the needs and wants of man in ... -
Characterisation of the microbial communities present in an anaerobic baffled reactor utilising molecular techniques
(2005)The provision of safe and sanitary water is a constitutional right and above all, a necessity of life. As a result of the rapid urbanisation and the past policies of apartheid, a large population of South Africa dwell in ... -
Chemical composition of essential oil from the seed Arils of Strelitzia nicolai Regel & Koern from South Africa
(Taylor and Francis, 2015-02-23)The essential oil components of arils from seeds of Strelitzia nicolai were investigated by GC and GC-MS. The oil yields of dried arils obtained by hydrodistillation were 0.86 %. Twenty-five compounds representing 94.2 % ... -
Chemical composition of essential oil of Psidium cattleianum var. lucidum (Myrtaceae)
(Academic Journalshttp://www.academicjournals.org/AJB, 2012-04-12)The aim of this study was to investigate the essential oil composition of Psidium cattleianum var. lucidum from South Africa. The essential oils were extracted by hydrodistillation and the components were identified by gas ... -
The chemical composition of leaf essential oils of Psidium guajava L. (white and pink fruit forms) from South Africa
(Taylor and Francis, 2015-02-23)The leaf oils of Psidium guajava (white fruit) and Psidium guajava (pink fruit) collected in KwaZulu-Natal province of South Africa has been examined by Gas chromatography-Mass spectrometry (GC-MS), and the apparent ... -
Chemoprotective action of natural products on cultured human epithelial cells exposed to aflatoxin B1
(2005)Previous studies indicate that a mutation in the non-oncogenic p53 gene is epidemiologically linked to human HCC (Ozturk, 1991; Chan et al., 2003). Hsu et al. (1991) found this link in Chinese, South African and Asian ... -
Cibulka correlation for ternary excess molar volumes for [MOA]⁺[Tf₂N]⁻ at different temperatures
(2012-08-20)In this work, the binary and ternary excess molar volumes have been calculated from the density, ρ, measurements using an Anton Paar (DMA 38) vibrating tube digital densimeter. One component of the ternary systems studied ... -
Comment on invalid JWKB unstable solutions of combined inertial-Rossby waves
(Annales Geophysicaewww.ann-geophys.net/30/571/2012/, 2012) -
Comparative analysis of genetically modified maize by implementation of a half-seed extraction technique
(2007)The development of transgenic plants resulted in the need to utilize the various molecular methods (e.g., ELISA, real - time PCR etc.) for the detection or analysis of the presence or absence of a specific trait in a ... -
A comparative analysis of stability and structure-functional relationships of different xylanases
(2013-07-30)A comparative thermostability analysis of different partially purified xylanases from Rhodothermus marinus, Bacillus halodurans, Thermomyces lanuginosus and Pulpzyme HC was studied using differential scanning fluorometry ... -
Comparison of packed school lunches of boys and girls in primary schools in East London
(2015)Objective: To determine the contribution of packed school lunches to the daily food intake of girls and boys in two Primary Schools in East London. Methods: The study was conducted among 199 girls and boys aged 9-13 ... -
Complete group classification of systems of two linear second-order ordinary differential equations
(Elsevierhttp://dx.doi.org/10.1016/j.cnsns.2013.04.012, 2013-11)We give a complete group classification of the general case of linear systems of two second-order ordinary differential equations excluding the case of systems which are studied in the literature. This paper gives the ... -
Complete group classification of systems of two linear second-order ordinary differential equations : the algebraic approach
(Wiley Online Library, 2013-08-23)We give a complete group classification of the general case of linear systems of two second-order ordinary differential equations. The algebraic approach is used to solve the group classification problem for this class of ... -
Computational studies of anti-cancer Aurein peptides
(2015-01-14)Peptide folding is a very complicated and dynamic process taking place in all living systems. The understanding of a bioactive conformation of the peptides is very important to understand their biological functions and ... -
Computational studies of the folding patterns of small and medium-size polypeptides
(2010)This study involved a series of molecular dynamics (MD) simulations applied to case studies of small and medium-size polypeptides to assess the thermodynamics of their folding characteristics. Peptide folding is a complex ... -
Correlation and prediction of the physical and excess properties of the ionic liquid 1-butyl-3-methylimidazolium methyl sulphate with several alcohols at T= (298.15 to 313.15) K
(2013-07-30)The thermodynamic properties of binary liquid mixtures using an ionic liquid (IL) with alcohols were determined at different temperatures. The ionic liquid used was 1-butyl-3- methylimidazolium methylsulphate [BMIM]+[MeSO4]-. ... -
Cycloaddition reactions of Azatrienes with Sulfene
(Scientific Researchhttp://dx.doi.org/10.4236/ijoc.2012.22019, 2012-04-23)Unprecedented cycloaddition reactions of azatrienes (1) with sulfene leading to the synthesis of functionalized thiazine-dioxide derivatives (5) are described. The reactions were found be highly regioselective resulting ... -
Cytotoxicity and gene expression of selected apoptotic markers in the human laryngeal carcinoma cell line (HEp-2) by Bulbine spp. fractions
(2013-07-30)Apoptosis, or programmed cell death, is a process which is pivotal in eliminating damaged, infected, or unwanted cells from the body. It has been studied in numerous types of cell lines ranging from normal to infected ... -
Densities and excess molar volume for the ternary systems (1-Butyl-3-methylimidazolium methyl sulphate + Nitromethane + Methanol or Ethanol or 1-Propanol) at T = (303.15 and 313.15) K
(SA Epublicationshttp://www.journals.co.za/WebZ/FETCH?sessionid=01-48159-474903037&recno=2&resultset=1&format=F&next=images/ejour/chem/chem_v66_a31.pdf&bad=ej/ej_badfetch.html&, 2013)The densities of the ternary systems containing the ionic liquid 1-butyl-3-methylimidazolium methyl sulphate ([BMIM]+[MeSO4]–) were determined. The ternary systems studied were ([BMIM]+[MeSO4]– + nitromethane + methanol ...