https://vital.seals.ac.za/vital/access/manager/Index ${session.getAttribute("locale")} 5 Determination of the botanical composition of black rhinoceros (Diceros bicornis) dung using the rbcL gene as a molecular marker, and analysis of antioxidant and phenolic content of its browse https://vital.seals.ac.za/vital/access/manager/Repository/vital:4070 ethyl acetate > chloroform. The DPPH free radical scavenging activity of the methanol plant extracts increased in the order Brachylaena elliptica > Plumbago auriculata > Grewia robusta > Azima tetracantha. Methanol extracts on the TLC plate sprayed with Fe³⁺-2,4,6-Tri-2-pyridyl-s-triazine (TPTZ) showed that the compounds present in the extracts react differently to ferric ion, with most compounds unable to reduce ferric ion. Furthermore the methanol extracts were able to exhibit reduction potentials vs. Ag/AgCl at low concentrations. The compounds in the extracts were shown to be phenolic acids and flavonoid glycosides.]]> Wed 12 May 2021 20:35:11 SAST ]]> Capillary membrane-immobilised polyphenol oxidase and the bioremediation of industrial phenolic effluent https://vital.seals.ac.za/vital/access/manager/Repository/vital:4095 Wed 12 May 2021 19:10:05 SAST ]]> Electrospun nanofibers as solid phase extraction sorbents and support for alkylphenols colorimetric probes https://vital.seals.ac.za/vital/access/manager/Repository/vital:4486 Wed 12 May 2021 18:44:44 SAST ]]> Investigation of the bioconversion of constituents of olive effluents for the production of valuable chemical compounds https://vital.seals.ac.za/vital/access/manager/Repository/vital:4078 Wed 12 May 2021 18:28:46 SAST ]]> Characterization and application of phthalocyanine-gold nanoparticle conjugates https://vital.seals.ac.za/vital/access/manager/Repository/vital:4293 Wed 12 May 2021 17:24:17 SAST ]]> The oxidative coupling of phenols using stoichiometric metal oxidants https://vital.seals.ac.za/vital/access/manager/Repository/vital:10977 Thu 13 May 2021 06:35:34 SAST ]]> Homogenous and heterogenous catalytic activity of metallophthalocyanines towards electrochemical detection of organic compounds https://vital.seals.ac.za/vital/access/manager/Repository/vital:4316 Mn⁽¹¹⁾ > Fe⁽¹¹⁾Pc > Ni⁽¹¹⁾Pc > Cu⁽¹¹⁾Pc > H₂Pc > Zn⁽¹¹⁾Pc > Bare GCE. A report is also given on electrocatalysis using [CoTSPc]⁴⁻ electrochemically deposited on the glassy carbon electrode. This was also found to enhance the anodic peak currents for the oxidation of all phenolic compounds. A report on the effects of scan rate, operating potential, analyte concentration and other variables is also given.]]> Thu 13 May 2021 06:04:02 SAST ]]> The development and evaluation of procedures for the synthesis of phenolic ethers by Baeyer-Villiger oxidation https://vital.seals.ac.za/vital/access/manager/Repository/vital:10955 Thu 13 May 2021 04:43:14 SAST ]]> Molecular and biochemical analysis of the diet of the black rhinoceros https://vital.seals.ac.za/vital/access/manager/Repository/vital:4064 Thu 13 May 2021 00:22:11 SAST ]]>