http://vital.seals.ac.za:8080/vital/access/manager/Index ${session.getAttribute("locale")} 5 Working with cultural-historical activity theory and critical realism to investigate and expand farmer learning in Southern Africa http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:43835 Wed 24 Apr 2024 13:49:34 SAST ]]> Capturefoundry: a gpu accelerated packet capture analysis tool http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:72666 Wed 22 May 2024 13:28:36 SAST ]]> A computer network attack taxonomy and ontology http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:72663 Wed 22 May 2024 12:50:27 SAST ]]> Mapping the most significant computer hacking events to a temporal computer attack model http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:72654 Wed 22 May 2024 12:03:33 SAST ]]> Remote fingerprinting and multisensor data fusion http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:72641 Wed 22 May 2024 10:25:24 SAST ]]> Geo-spatial autocorrelation as a metric for the detection of fast-flux botnet domains http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:72640 Wed 22 May 2024 10:19:08 SAST ]]> Building a Graphical Fuzzing Framework http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:72638 Wed 22 May 2024 09:42:33 SAST ]]> An Analysis and Implementation of Methods for High Speed Lexical Classification of Malicious URLs http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:72637 Wed 22 May 2024 09:34:21 SAST ]]> A network telescope perspective of the Conficker outbreak http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:72635 Wed 22 May 2024 07:54:07 SAST ]]> Interaction of CdTe quantum dots with 2, 2-diphenyl-1-picrylhydrazyl free radical http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51402 Wed 10 Apr 2024 15:13:46 SAST ]]> Spectroscopic and physicochemical behavior of magnesium phthalocyanine derivatives mono-substituted with a carboxylic acid group http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51258 Wed 10 Apr 2024 15:13:45 SAST ]]> Imidazole-functionalized polymer microspheres and fibers–useful materials for immobilization of oxovanadium (IV) catalysts http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51431 99%) were obtained in under 240 min with turn-over frequencies ranging from 21.89 to 265.53 h−1, depending on the quantity of catalyst and temperature. The microspherical catalysts also proved to be recyclable with no drop in activity being observed after three successive reactions. The vanadium functionalized fibers were applied in a pseudo continuous flow set-up. Factors influencing the overall conversion and product selectivity, including flow rate and catalyst quantity, were investigated. At flow rates of 1–4 mL h−1 near quantitative conversion was maintained over an extended period. Keeping the mass of catalyst constant (0.025 g) and varying the flow rate from 1–6 mL h−1 resulted in a shift in the formation of the oxidation product methyl phenyl sulfone from 60.1 to 18.6%.]]> Wed 10 Apr 2024 14:17:42 SAST ]]> PhDs by publications http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:55693 Wed 08 May 2024 19:51:22 SAST ]]> Single walled carbon nanotubes functionalized with nickel phthalocyanines http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51410 Wed 08 May 2024 17:51:48 SAST ]]> Unquenched fluorescence lifetime for β-phenylthio substituted zinc phthalocyanine upon conjugation to gold nanoparticles http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51404 Wed 08 May 2024 16:18:02 SAST ]]> Synthesis of phthalocyanine conjugates with gold nanoparticles and liposomes for photodynamic therapy http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51406 Wed 08 May 2024 16:17:46 SAST ]]> Synthesis and physicochemical behaviour of aluminium trikis and tetrakis (diaquaplatinum) octacarboxyphthalocynine http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51068 Wed 08 May 2024 16:17:18 SAST ]]> Synthesis and photophysicochemical properties of novel zinc phthalocyanines mono substituted with carboxyl containing functional groups http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51037 Wed 08 May 2024 16:16:48 SAST ]]> Synthesis and photophysical behavior of a novel zinc phthalocyanine containing a single carboxylic acid and three phenylthio substituents http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51127 Wed 08 May 2024 16:16:20 SAST ]]> Photooxidation of 4-chlorophenol sensitized by lutetium tetraphenoxy phthalocyanine anchored on electrospun polystyrene polymer fiber http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51405 Wed 08 May 2024 16:15:58 SAST ]]> Oxovanadium (IV)-catalysed oxidation of dibenzothiophene and 4, 6-dimethyldibenzothiophene http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51429 Wed 08 May 2024 16:15:32 SAST ]]> Synthesis, density functional theory, molecular dynamics and electrochemical studies of 3-thiopheneacetic acid-capped gold nanoparticles http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51477 Wed 08 May 2024 15:45:08 SAST ]]> Facile deposition of gold nanoparticle thin films on semi-permeable cellulose substrate http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51063 Wed 08 May 2024 15:44:46 SAST ]]> Synthesis and photophysical properties of covalent conjugates of aqua platinum (II) and octacarboxy-substituted zinc phthalocyanine http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51073 Wed 08 May 2024 15:30:00 SAST ]]> A highly selective and sensitive pyridylazo-2-naphthol-poly (acrylic acid) functionalized electrospun nanofiber fluorescence “turn-off” chemosensory system for Ni 2+ http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51428 Wed 05 Apr 2023 08:50:33 SAST ]]> Tetra and octa (2, 6-di-iso-propylphenoxy)-substituted phthalocyanines http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51411 Tue 24 May 2022 23:32:35 SAST ]]> Electrocatalytic behavior of cobalt phthalocyanine complexes immobilized on glassy carbon electrode towards the reduction of dicrotophos pesticide http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51409 Tue 24 May 2022 23:11:37 SAST ]]> Schottky barrier diode parameters of Ag/MgPc/p-Si structure http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51408 Tue 24 May 2022 22:59:57 SAST ]]> In vitro photodynamic effect of aluminum tetrasulfophthalocyanines on melanoma skin cancer and healthy normal skin cells http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51403 Tue 24 May 2022 22:06:43 SAST ]]> A comparative study on the sensitive detection of hydroxyl radical using thiol-capped CdTe and CdTe/ZnS quantum dots http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51077 MPA-CdTe@ZnS > TGA-CdTe > MPA-CdTe QDs. Under the optimum conditions, a limit of detection as low as 8.5 × 10-8 M was obtained using GSH-CdTe@ZnS. The effects of foreign reactive oxygen species and the Fenton reactants and products as possible interferences on the proposed probe were negligible for CdTe@ZnS QDs. Besides, experimental results indicated that CdTe@ZnS QDs were more attractive for the selective recognition of ●OH than CdTe QDs. The mechanistic reaction pathway between the QDs and ●OH is proposed.]]> Tue 17 May 2022 14:45:18 SAST ]]> Synthesis and physicochemical behavior of new low symmetry Ge, Ti and Sn phthalocyanines http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51040 Tue 17 May 2022 10:47:52 SAST ]]> The use of hot and cold high pressure homogenization to enhance the loading capacity and encapsulation efficiency of nanostructured lipid carriers for the hydrophilic antiretroviral drug, didanosine for potential administration to paediatric patients http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:44170 Tue 14 May 2024 11:57:11 SAST ]]> Syntheses, protonation constants and antimicrobial activity of 2-substituted N-alkylimidazole derivatives http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:44165 2500 µg mL–1) bacteria and all the compounds were inactive against the yeast (Candida albicans).]]> Tue 14 May 2024 11:56:44 SAST ]]> The use of response surface methodology in the evaluation of captopril microparticles manufactured using an oil in oil solvent evaporation technique http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:44191 Tue 14 May 2024 11:03:22 SAST ]]> Trends in the optical and redox properties of tetraphenyltetraphenanthroporphyrins http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51407 Tue 07 May 2024 16:00:38 SAST ]]> The economics of suicide in South Africa http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:69155 Tue 07 May 2024 09:09:34 SAST ]]> Firm age, collateral value, and access to debt financing in an emerging economy: evidence from South Africa http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:69147 Tue 07 May 2024 09:08:50 SAST ]]> A production function for cricket: the South African perspective http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:69143 Tue 07 May 2024 09:08:21 SAST ]]> Lost in translation: Transformation in the first round of institutional audits http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:44627 Tue 05 Oct 2021 14:13:15 SAST ]]> Students’ navigation of the uncharted territories of academic writing http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:44626 Tue 05 Oct 2021 14:10:53 SAST ]]> A qualitative analysis to determine the readiness of rural communities to adopt ICTs: A Siyakhula Living Lab Case Study http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:72771 Thu 23 May 2024 15:25:46 SAST ]]> Living lab methodology as an approach to innovation in ICT4D: The Siyakhula Living Lab experience http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:72762 Thu 23 May 2024 13:07:44 SAST ]]> Challenges experienced in the first year of implementation of a teaching and learning virtual partnership at the University of Namibia http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:72756 Thu 23 May 2024 12:13:58 SAST ]]> The syntheses and photophysical properties of 4, 4′-isopropylidendioxydiphenyl substituted ball-type dinuclear Mg (II) and Zn (II) phthalocyanines http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51163 Thu 19 May 2022 22:16:04 SAST ]]> Electrospun polyacrylic acid polymer fibers functionalized with metallophthalocyanines for photosensitizing and gas sensing applications http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51162 Thu 19 May 2022 22:09:21 SAST ]]> The synthesis, photophysical and dielectric properties of ball-type dinuclear zinc phthalocyanine http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51161 Thu 19 May 2022 22:01:52 SAST ]]> Physico-chemical properties of lutetium phthalocyanine complexes in solution and in solid polystyrene polymer fibers and their application in photoconversion of 4-nitrophenol http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51160 Thu 19 May 2022 21:54:29 SAST ]]> Layer by Layer Electrode Surface Functionalisation Using Carbon Nanotubes, Electrochemical Grafting of Azide‐Alkyne Functions and Click Chemistry http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51159 Thu 19 May 2022 21:40:16 SAST ]]> Reverse saturation absorption spectra and optical limiting properties of chlorinated tetrasubstituted phthalocyanines containing different metals http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51158 Thu 19 May 2022 21:29:44 SAST ]]> A study on the morphology of thin copper films on para-aramid yarns and their influence on the yarn’s electro-conductive and mechanical properties http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51157 Thu 19 May 2022 21:16:19 SAST ]]> Synthesis and photophysical properties of peripherally and non-peripherally mercaptopyridine substituted metal free, Mg (II) and Al (III) phthalocyanines http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51131 Thu 19 May 2022 12:25:05 SAST ]]> Photophysical and photochemical studies of sulfur containing phthalocyanine derivatives in the presence of folic acid http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51124 Thu 19 May 2022 11:57:52 SAST ]]> Molecular catalysis of the oxygen reduction reaction by iron porphyrin catalysts tethered into Nafion layers http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51123 Thu 19 May 2022 11:42:31 SAST ]]> The photophysical and energy transfer behaviour of low symmetry phthalocyanine complexes conjugated to coreshell quantum dots http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51111 Thu 19 May 2022 09:49:11 SAST ]]> The art of dying http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:55073 Thu 18 Aug 2022 14:34:43 SAST ]]> A lover’s shame http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:55071 Thu 18 Aug 2022 14:30:45 SAST ]]> Higher education, academic communities, and the intellectual virtues http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:55066 Thu 18 Aug 2022 13:54:00 SAST ]]> Spectral, photophysical and photochemical properties of tetra-and octaglycosylated zinc phthalocyanines http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51256 Fri 20 May 2022 23:47:11 SAST ]]> Photophysics and photochemistry of octaglucosylated zinc phthalocyanine derivatives http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51255 Fri 20 May 2022 23:36:40 SAST ]]> 4-Azidoaniline-based electropolymer as a building block for functionalisation of conductive surfaces http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51254 Fri 20 May 2022 23:25:33 SAST ]]> CdTe quantum dots functionalized with 4-amino-2, 2, 6, 6-tetramethylpiperidine-N-oxide as luminescent nanoprobe for the sensitive recognition of bromide ion http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51253 Fri 20 May 2022 23:08:42 SAST ]]> Characterization of 2,(3)-tetra-(4-oxo-benzamide) phthalocyaninato cobalt (II)—single walled carbon nanotube conjugate platforms and their use in electrocatalysis of amitrole http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51252 Fri 20 May 2022 23:00:31 SAST ]]> Comparison of carbon screen-printed and disk electrodes in the detection of antioxidants using CoPc derivatives http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51251 Fri 20 May 2022 22:54:21 SAST ]]> Photophysical and photochemical properties of novel phthalocyanines bearing non-peripherally substituted mercaptoquinoline moiety http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:51250 Fri 20 May 2022 22:43:23 SAST ]]> The effect of harvesting approaches on fruit yield, embelin concentration and regrowth dynamics of the forest shrub, Embelia tsjeriam-cottam, in central India http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:43698 100 t/yr), which has imposed tremendous pressure on some natural populations. The fruits contain embelin (a benzoquinone derivative), which has wide clinical applications. Considering the importance, growing use and decreasing populations in some areas of its natural habitat, a study on development of sustainable harvesting practices of E. tsjeriam-cottam fruits was conducted in Chhattisgarh, in central India. Experiments were laid out in Dhamtari, Marvahi and Bilaspur forest divisions of the state covering both protected and open forests in a randomized design with three replications. At each site, quadrats of 40 × 20 m were laid out to study the effect of two fruit harvesting methods and four harvesting intensities on fruit yield, and regeneration of the species. Fruits were analyzed for their embelin content by HPLC method. This study is the first to experimentally assess the consequences of harvesting of E. tsjeriam-cottam fruits from India. It was found that up to 70% fruits could be hand plucked at the right time of maturity (December) to obtain quality produce without impacting the current population size. Since every year is not a good fruiting year, it is difficult to develop universal harvest regime for sustainable management of E. tsjeriam-cottam. The embelin content increased as fruits ripened, ranging from 1.01% to 5.63%. The adoption of sustainable harvesting practices will be helpful in sustainable management of E. tsjeriam-cottam and also provide income and livelihood opportunities to rural people on a sustainable basis.]]> Fri 10 May 2024 15:16:11 SAST ]]> Is there no urban forestry in the developing world? http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:43695 Fri 10 May 2024 15:15:02 SAST ]]> How do HIV and AIDS impact the use of natural resources by poor rural populations?: The case of wild animal products http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:43822 Fri 10 May 2024 15:13:55 SAST ]]> Linking poverty, HIV/AIDS and climate change to human and ecosystem vulnerability in southern Africa: Consequences for livelihoods and sustainable ecosystem management http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:43697 Fri 10 May 2024 13:01:37 SAST ]]> The direct use value of municipal commonage goods and services to urban households in the Eastern Cape, South Africa http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:43696 Fri 10 May 2024 03:31:52 SAST ]]> The implacable grandeur of the stranger http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:49673 Fri 08 Apr 2022 10:34:45 SAST ]]> The pump room http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:49256 Fri 01 Apr 2022 12:45:20 SAST ]]> Part II Zef/poor white kitsch chique http://vital.seals.ac.za:8080/vital/access/manager/Repository/vital:49255 Fri 01 Apr 2022 12:38:44 SAST ]]>