https://vital.seals.ac.za/vital/access/manager/Index ${session.getAttribute("locale")} 5 Being Brave: Writing Environmental Education Research https://vital.seals.ac.za/vital/access/manager/Repository/vital:44267 Wed 24 Apr 2024 16:13:10 SAST ]]> Counter-hair/gemonies: hair as a site of black identity struggle in post-apartheid South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:3024 Wed 12 Oct 2022 10:10:04 SAST ]]> A historical study of John Graham Lake and South African/United States pentecostalism https://vital.seals.ac.za/vital/access/manager/Repository/vital:2587 Wed 12 May 2021 23:06:18 SAST ]]> "Ufunda de ufe" : the story of a village psychologist in a rural, South African school setting https://vital.seals.ac.za/vital/access/manager/Repository/vital:689 Wed 12 May 2021 23:03:54 SAST ]]> Critical literacy in South Africa : possibilities and constraints in 2002 https://vital.seals.ac.za/vital/access/manager/Repository/vital:6330 Wed 12 May 2021 22:46:29 SAST ]]> Barkly East bells and the British Empire https://vital.seals.ac.za/vital/access/manager/Repository/vital:6178 Wed 12 May 2021 22:44:39 SAST ]]> Convergence of old and new: a case study analysis of the development online by a South African radio station: Radiosondergrense/www.rsg.co.za https://vital.seals.ac.za/vital/access/manager/Repository/vital:3498 Wed 12 May 2021 22:36:21 SAST ]]> A cyclic approach to business continuity planning https://vital.seals.ac.za/vital/access/manager/Repository/vital:10788 Wed 12 May 2021 22:23:51 SAST ]]> Building project management within financial institutions, a comparative assessment https://vital.seals.ac.za/vital/access/manager/Repository/vital:10893 Wed 12 May 2021 20:06:49 SAST ]]> Can formal language planning link to grassroots cultural initiatives?: an informal investigation https://vital.seals.ac.za/vital/access/manager/Repository/vital:7041 Wed 12 May 2021 20:02:08 SAST ]]> An analysis of how to improve customer relations in local government with particular reference to the Buffalo City Municipality in East London https://vital.seals.ac.za/vital/access/manager/Repository/vital:10917 Wed 12 May 2021 19:28:31 SAST ]]> An investigation of the effect of time of pruning on the growth and fruiting of lemons [Citrus limon(L.) Burmann f.] cv. Eureka https://vital.seals.ac.za/vital/access/manager/Repository/vital:10974 Wed 12 May 2021 19:26:20 SAST ]]> Gender discourse and Malawian rural communities: a study of the meaning the people of traditional authority Likoswe of Chiradzulo make from human rights and gender messages https://vital.seals.ac.za/vital/access/manager/Repository/vital:3456 Wed 12 May 2021 19:17:42 SAST ]]> An investigation of the neuroprotective effects of estrogen in a model of quinolinic acid-induced neurodegeneration https://vital.seals.ac.za/vital/access/manager/Repository/vital:3759 Wed 12 May 2021 19:03:28 SAST ]]> Continuity and generalized continuity in dynamics and other applications https://vital.seals.ac.za/vital/access/manager/Repository/vital:5404 Wed 12 May 2021 18:57:22 SAST ]]> A phenomenological investigation of Windhoek Senior Secondary school principals' perceptions and experiences of their leadership roles https://vital.seals.ac.za/vital/access/manager/Repository/vital:1700 Wed 12 May 2021 18:56:53 SAST ]]> An investigation of the effects of leadership training on junior managements' (sic) morale at three manufacturing organisations within the Buffalo City Area https://vital.seals.ac.za/vital/access/manager/Repository/vital:10908 Wed 12 May 2021 18:51:49 SAST ]]> A study of recruitment and selection policies with specific reference to the Sundays River Valley Municipality https://vital.seals.ac.za/vital/access/manager/Repository/vital:10773 Wed 12 May 2021 18:50:59 SAST ]]> Finite element simulations of shear aggregation as a mechanism to form platinum group elements (PGEs) in dyke-like ore bodies https://vital.seals.ac.za/vital/access/manager/Repository/vital:5561 Wed 12 May 2021 18:11:32 SAST ]]> A comparative study of atmospheric dynamics in the mesosphere and lower thermosphere (MLT) near Grahamstown (South Africa) and Adelaide (Australia) https://vital.seals.ac.za/vital/access/manager/Repository/vital:5506 Wed 12 May 2021 17:56:29 SAST ]]> Dynamics of early stage fishes associated with selected warm temperate estuaries in South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:5262 Wed 12 May 2021 17:39:21 SAST ]]> English in the prison services: a case of breaking the law? https://vital.seals.ac.za/vital/access/manager/Repository/vital:6133 Wed 12 May 2021 17:38:29 SAST ]]> Asthenospheric and lithospheric sources for Mesozoic dolerites from Liberia (Africa): trace element and isotopic evidence https://vital.seals.ac.za/vital/access/manager/Repository/vital:37887 Wed 12 May 2021 17:28:42 SAST ]]> "The wife of Lucifer" : women and evil in Charles Dickens https://vital.seals.ac.za/vital/access/manager/Repository/vital:2189 Wed 12 May 2021 17:21:49 SAST ]]> Design, evaluation and comparison of evolution and reinforcement learning models https://vital.seals.ac.za/vital/access/manager/Repository/vital:4625 Wed 12 May 2021 16:30:45 SAST ]]> Broken vessels : the im-possibility of the art of remembrance and re-collection in the work of Anselm Kiefer, Christian Boltanski, William Kentridge and Santu Mofokeng https://vital.seals.ac.za/vital/access/manager/Repository/vital:2395 Wed 12 May 2021 16:30:11 SAST ]]> Catalytic behaviour of metallophthalocyanines towards the detection of nitric oxide https://vital.seals.ac.za/vital/access/manager/Repository/vital:4418 Wed 12 May 2021 16:25:06 SAST ]]> Evaluation of broiler performance under small-scale and semi-commercial farming conditions in the Northern Province https://vital.seals.ac.za/vital/access/manager/Repository/vital:10964 Wed 12 May 2021 16:23:33 SAST ]]> 'n Kritiese evaluering na die effektiwiteit van bestuurstrategieë vir ekstensiewe wolskaapboerdery in die groter Burgersdorp omgewing https://vital.seals.ac.za/vital/access/manager/Repository/vital:10953 Wed 12 May 2021 16:15:27 SAST ]]> Biological generation of reactive alkaline species and their application in a sustainable bioprocess for the remediation of acid and metal contaminated wastewaters https://vital.seals.ac.za/vital/access/manager/Repository/vital:21049 Cu > Zn >>Fe. The binding capacity of the Spirulina for each of the metals was relatively low when compared to a range of other biosorbents. The toxicity thresholds of the algae was determined for copper and zinc. These were low (10umoles/g) and as such, the algae were not suitable for application in a treatment system in which they came into direct contact with the toxic metals. The algae were able to increase the pH of the surrounding medium. This occurred as a result of the accumulation of inorganic carbon, from bicarbonate, as a response to low concentrations of carbon dioxide in the medium. The resulting release of a hydroxide ion into solution led to the increase in pH. The increase in pH was shown to be due to a reduction in acidity, rather than an increase in alkalinity. The enzyme carbonic anhydrase was shown to be pivotal in this system. Attempts to determine the enzyme activity directly were unsuccessful, due to the inherent inaccuracy of the assay system. An indirect method of determining enzyme activity, by measuring changes in the carbonate species equilibrium, was developed. Under optimal conditions Spirulina was able to reduce the acidity by an amount equivalent to the addition of 3670umoles NaOH g·' h·'. Predictive modelling showed that this enhanced the potential of the medium to effect metal precipitation. For the algal system to be sustainable, a readily available source of bicarbonate was needed. This was achieved by the oxidation of organic carbon, under sulphidogenic conditions, by a bacterial consortium isolated from the anaerobic component of a facultative pond. The consortium was shown to consist of sulphate reducing (most likely Desulvovibrio and Desulfotomaculum)and acetogenic bacteria. Sulphate removal rates of 500mg 1·' day·' and 135mg 1·' day·' were achieved in a 21 agitated and 281 upflow reactor respectively. The bicarbonate generation rate in the 281 reactor was calculated as 4033umoles 1·' day·', which proved sufficient to act as a feed for the algal system. Sparging the anaerobic digester overflow with air and nitrogen resulted in a reduction in the aqueous sulphide concentration. Using nitrogen, a 70% recovery of sulphide, as H2S gas, was achieved in 60 minutes, while with air, this dropped to 40%, due to the oxidation of the aqueous sulphide. The stripping ofH2S resulted in an increase in pH. The H2S gas was used for the selective precipitation of copper and lead in the integrated system. The dynamics of metal precipitation was investigated. For simple reactions, between individual IV metal and base species, it was possible to generate an accurate predictive model and confirm the precipitating species using wavelength dispersive X-ray spectroscopy (WDS). In more complex systems, where precipitation of the artificial acid mine drainage was examined, the predictive modelling and WDS could not accurately describe the system. The addition of aqueous sulphide to copper and iron resulted in the formation of metastable, amorphous precipitates, which remained in suspension. Ageing of the copper precipitate resulted in the evolution of a stable crystalline structure (covellite) and the aggregation and settling of the precipitate. In the case of iron, the amorphous precipitate underwent oxidation before a stable iron sulphide could evolve and the settled precipitate was an iron oxide or oxyhydroxide. The artificial acid mine drainage was treated with sulphide, hydroxide, anaerobic digester overflow and algal overflow. The best metal removal was achieved with the sulphide and hydroxide, while the algal overflow outperformed the anaerobic digester overflow. The precipitate generated by the addition of sulphide was the most compact, followed by the algal overflow, the anaerobic digester overflow and the hydroxide. Efficient precipitation of all the heavy metals, except manganese, was achieved using the algal overflow at an acidity to alkalinity ratio of 1 :2. This ratio was selected for use in the pilot system. The Spirulina based pilot system was effectively used to treat an effluent from the Black Mountain base metal mine. The necessity to maintain the algae in suspension and avoid biomass washout were practical considerations which counted against this system. The replacement of the Spirulina by Oscillatoria, which adhered to a solid support, overcame these problems. The integrated biological system was able to effectively treat an artificial acid mine drainage for 90 days, reducing the concentration of all metals, except manganese, to below the acceptable environmental risk levels. The treatment of the final effluent in a second anaerobic digester reduced the manganese concentration to 4.5uM and proved that the sulphate reducing bacteria could be cultivated on enriched, partially treated acid mine drainage. The integrated biological treatment system performed well, effectively treating an effluent modelled closely on the quality of the water being discharged from the East Rand Basin. The cost of such a system would be considerably less than a "high tech" physico-chemical system. This, coupled with the potential long term sustainability of a biological system, would make it a potentially attractive option for the treatment of future acid mine drainage discharges.]]> Wed 12 May 2021 16:00:34 SAST ]]> Evaluation of manufacturing processes for the production of atrazine https://vital.seals.ac.za/vital/access/manager/Repository/vital:10960 97% could be achieved where the resultant product was well within stipulated product specifications. In view of the results obtained, the following recommendations regarding the synthesis of atrazine in toluene as reaction solvent can be made: · Use a reagent addition sequence that staggers the addition of amine and NaOH in such a manner that amine is added first for a short while, followed by the simultaneous addition of amine and NaOH, and ending with NaOH. Use two reaction vessels in series, one for the IPA addition reaction and one for the MEA addition reaction. In this manner the reaction can be run on a continuous basis since no lag time between amine additions is required. Also, smaller reactors may be used whilst maintaining high production rates. Smaller reactors will improve both temperature control and mixing of reagents.]]> Wed 12 May 2021 15:57:46 SAST ]]> A comprehensive study of the social responsibility practices of two selected financial insitutions https://vital.seals.ac.za/vital/access/manager/Repository/vital:10857 Wed 12 May 2021 15:47:07 SAST ]]> Deconstructive discourse analysis: extending the methodological conversation https://vital.seals.ac.za/vital/access/manager/Repository/vital:6259 Wed 10 Aug 2022 05:18:17 SAST ]]> A taxonomic revision of the genus Bergeranthus Schwantes (Mesembryanthemaceae) in South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:4248 Wed 07 Jul 2021 14:02:53 SAST ]]> Fuel wood use in South Africa: Where to in the 21st Century? https://vital.seals.ac.za/vital/access/manager/Repository/vital:43905 Wed 04 Aug 2021 14:51:34 SAST ]]> Effects of axial ligands on the photophysical properties of silicon octaphenoxyphthalocyanine https://vital.seals.ac.za/vital/access/manager/Repository/vital:56651 Tue 20 Sep 2022 14:36:09 SAST ]]> Cyclic voltammetric studies of octabutylthiophthalo-cyaninato-cobalt (II) and its self-assembled monolayer (SAM) on gold electrode https://vital.seals.ac.za/vital/access/manager/Repository/vital:56650 Tue 20 Sep 2022 14:34:16 SAST ]]> Accelerated sludge solubilisation under sulphate reducing conditions: the effect of hydrolytic enzymes on sludge floc size distribution and EPS composition https://vital.seals.ac.za/vital/access/manager/Repository/vital:6455 Thu 21 Sep 2023 14:58:54 SAST ]]> From conflict to negotiation: nature-based development on the South African Wild Coast. Special edition https://vital.seals.ac.za/vital/access/manager/Repository/vital:543 Thu 15 Jul 2021 19:31:35 SAST ]]> Exploring the suitability of the evaluation criteria used in the MPT projects, by looking at hard and soft components of development programmes https://vital.seals.ac.za/vital/access/manager/Repository/vital:3397 Thu 13 May 2021 16:40:34 SAST ]]> Effects of Axial Ligands on the Photosensitising Properties of Silicon Octaphenoxyphthalocyanines https://vital.seals.ac.za/vital/access/manager/Repository/vital:4553 600 nm) in dimethylsulphoxide solution. All the ligands were transformed into the dihydroxy silicon octaphenoxyphthalocyanine with varying degrees of phototransformation quantum yields ranging in order from 10⁻³ to 10⁻⁵ depending on the axial ligand involved. During and after axial ligand transformations a photodegredation of the dihydroxy silicon octaphenoxy phthalocyanine was observed upon continued irradiation. The oligomers were found to undergo the same axial ligand transformation process with a phototransformation quantum yield of 10⁻⁵ The singlet oxygen quantum yields of the unaggregated monomeric silicon octaphenoxy phthalocyanines were all found to be approximately 0.2 with the exception of a compound with two (trihexyl)siloxy axial substituents that had a singlet oxygen quantum yield of approximately 0.4 in dimethylsulphoxide solutions. The oligomers showed a surprising trend of an increase in singlet oxygen quantum yield with an increase in phthalocyanine ring number up to the pentamer and then a dramatic decrease to the nonamer. The triplet quantum yield and triplet lifetime were determined by laser flash photolysis for selected compounds and no correlation was observed with any of these properties and the singlet oxygen quantum yields. These selected compounds all fluoresce and a very good correlation was found between the fluorescence lifetimes determined experimentally by laser photolysis and the Strickler-Berg equation for the non-aggregated compounds. Electrochemical measurements also indicate the importance of the axial ligands upon the behaviour of the phthalocyanines as cyclic voltammetric behaviour was determined by the nature of the axial ligand.]]> Thu 13 May 2021 14:52:35 SAST ]]> A case study of the language policy in practice in the foundation phase of schooling https://vital.seals.ac.za/vital/access/manager/Repository/vital:1442 Thu 13 May 2021 13:14:16 SAST ]]> "Effulgent in the firmament" the politics of representation and the politics of reception in South Africa's 'poetry of commitment', 1968-1983 https://vital.seals.ac.za/vital/access/manager/Repository/vital:10987 Thu 13 May 2021 13:05:57 SAST ]]> A description of spatial and temporal aspects of the lifecycle of chokka squid Loligo vulgaris reynaudii on the inshore spawning grounds and Agulhas bank off the South Coast of South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:5253 Thu 13 May 2021 10:49:07 SAST ]]> An evaluation of family poultry production systems in the Northern region https://vital.seals.ac.za/vital/access/manager/Repository/vital:10962 Thu 13 May 2021 10:21:05 SAST ]]> A systems approach to marketing in less developed agriculture with reference to Bululwane Irrigation Scheme https://vital.seals.ac.za/vital/access/manager/Repository/vital:11192 Thu 13 May 2021 08:52:35 SAST ]]> An investigation into the conflict management styles used in organisations with special reference to some organisations in the northern region of the Eastern Cape Province https://vital.seals.ac.za/vital/access/manager/Repository/vital:10911 Thu 13 May 2021 08:17:51 SAST ]]> An assessment of the genetic diversity and origin of the invasive weed Chromolaena Odorata (L.) King and Robinson in South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:4233 Thu 13 May 2021 08:16:26 SAST ]]> A critical review of literature on the expected roles of principals in schools https://vital.seals.ac.za/vital/access/manager/Repository/vital:1914 Thu 13 May 2021 08:09:25 SAST ]]> Determining and improving the level of service quality at International Healthcare Distributors https://vital.seals.ac.za/vital/access/manager/Repository/vital:10897 Thu 13 May 2021 07:07:05 SAST ]]> Dublin founders of ringing bells https://vital.seals.ac.za/vital/access/manager/Repository/vital:6174 Thu 13 May 2021 07:06:02 SAST ]]> Biological sulphide oxidation in heterotrophic environments https://vital.seals.ac.za/vital/access/manager/Repository/vital:3919 Thu 13 May 2021 07:05:18 SAST ]]> Development of nickel-selective molecularly imprinted polymers https://vital.seals.ac.za/vital/access/manager/Repository/vital:4292 Thu 13 May 2021 06:51:05 SAST ]]> Effect of selected physical and production traits on the tick burdens of beef cattle https://vital.seals.ac.za/vital/access/manager/Repository/vital:10966 Thu 13 May 2021 06:47:43 SAST ]]> Formulation and assessment of monolithic beta blocker sustained release tablets prepared by direct compression https://vital.seals.ac.za/vital/access/manager/Repository/vital:3764 Thu 13 May 2021 06:45:58 SAST ]]> Effects of substituents on the photosensitizing and electrocatalytic properties of phthalocyanines https://vital.seals.ac.za/vital/access/manager/Repository/vital:4554 SnPc>ZnPc. Triplet lifetimes of the GePc (168-340μs) are very similar to that of the ZnPc (197 - 366μs), but the triplet lifetimes of the SnPc are ten fold shorter (10 - 32μs ). Triplet quantum yields are higher for the GePc (0.20 - 0.50) and SnPc (0.08 - 0.45) than for the ZnPc (0.02 - 0.25). Fluorescence lifetimes of GePc ( 4.0 - 5.1 ns) are significantly longer than that of ZnPc (1.9 - 3.0 ns) and SnPc (0.2 - 0.4 ns). Fluorescence quantum yields decrease in the following order: GePc(0.21-0.31)>ZnPc(0.02-0.21)>SnPc(0.02- 0.06). Ring-substituted cobalt phthalocyanine complexes of the form CoPc(R)4 (R= NH2, N02, C(CH3)3, S03H and COOH) are compared for their catalytic activities towards the oxidation of cysteine. The potential for the electrocatalytic oxidation of cysteine is closely related to the Com/Co11 couple of the CoPc(R)4 complexes in acidic media and to the Con/Co1 couple in basic media. The catalytic current and the oxidation potential for cysteine are dependent on the pH of the solution, the potential becoming less positive and the currents increasing with increase in pH.]]> Thu 13 May 2021 06:41:11 SAST ]]> Bad faith: the psychological life of a satanist who committed murder https://vital.seals.ac.za/vital/access/manager/Repository/vital:3152 Thu 13 May 2021 06:33:02 SAST ]]> An investigation into the viability of deploying thin client technology to support effective learning in a disadvantaged, rural high school setting https://vital.seals.ac.za/vital/access/manager/Repository/vital:4627 Thu 13 May 2021 06:32:06 SAST ]]> A history of confession: the dialogue between cynicism and grace in selected novels of J.M. Coetzee https://vital.seals.ac.za/vital/access/manager/Repository/vital:2190 Thu 13 May 2021 06:28:27 SAST ]]> Case studies of equivalent fuzzy subgroups of finite abelian groups https://vital.seals.ac.za/vital/access/manager/Repository/vital:5401 Thu 13 May 2021 05:48:23 SAST ]]> Building brand loyalty within selected segments of the South African fast moving consumer goods market https://vital.seals.ac.za/vital/access/manager/Repository/vital:10774 Thu 13 May 2021 05:44:27 SAST ]]> Diamondback Moth, Plutella xylostella (L.), (Lepidoptera: Plutellidae ), and Other Insects of Canola, Brassica napus L., in Gauteng Province, South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:5937 Thu 13 May 2021 05:33:32 SAST ]]> Extension theorems on L-topological spaces and L-fuzzy vector spaces https://vital.seals.ac.za/vital/access/manager/Repository/vital:5405 Thu 13 May 2021 05:32:14 SAST ]]> Achieving successful implementation of lean manufacturing control systems, to achieve world class status, at Ford Motor Componay of Southern Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:10909 Thu 13 May 2021 05:30:06 SAST ]]> Biosulphidogenic hydrolysis of lignin and lignin model compounds https://vital.seals.ac.za/vital/access/manager/Repository/vital:3917 Thu 13 May 2021 05:04:53 SAST ]]> Design, development and analysis of the friction stir welding process https://vital.seals.ac.za/vital/access/manager/Repository/vital:10809 Thu 13 May 2021 05:04:11 SAST ]]> Employee ownership in the context of globalisation: a developing country perspective https://vital.seals.ac.za/vital/access/manager/Repository/vital:39532 Thu 13 May 2021 04:48:21 SAST ]]> An investigation into the progress made towards achieving employment equity at Calsonic Kansei South Africa (PTY) Limited in terms of the Employment Equity Act no. 55 of 1998 https://vital.seals.ac.za/vital/access/manager/Repository/vital:10895 Thu 13 May 2021 04:43:03 SAST ]]> Genetic characterization of conspecific populations of Tilapia Sparrmanii (A.Smith 1840) in the dolomitic sinkholes and springs of the North-West Province (South Africa), and their comparison to Tilapia Guinasana (Trewavas 1936) https://vital.seals.ac.za/vital/access/manager/Repository/vital:4079 Thu 13 May 2021 04:31:19 SAST ]]> A workers handbook on HIV and AIDS https://vital.seals.ac.za/vital/access/manager/Repository/vital:37253 Thu 13 May 2021 04:18:53 SAST ]]> Society, the body and pain : sociological factors in assessing the meaning and experience of pain in myalgic encephalomyelitis ("yuppie flu") sufferers https://vital.seals.ac.za/vital/access/manager/Repository/vital:3360 Thu 13 May 2021 04:15:55 SAST ]]> Alkane oxidation using metallophthalocyanine as homogeneous catalysts https://vital.seals.ac.za/vital/access/manager/Repository/vital:4449 Thu 13 May 2021 04:08:44 SAST ]]> An exploration of the social worker's role in promoting sustainability of poverty alleviating projects https://vital.seals.ac.za/vital/access/manager/Repository/vital:6058 Thu 13 May 2021 04:06:15 SAST ]]> An exploration of functional and numerical flexibility in South African organisations: a qualitative study in two textile factories in Cape Town https://vital.seals.ac.za/vital/access/manager/Repository/vital:3347 Thu 13 May 2021 04:02:08 SAST ]]> A preliminary investigation into the patterns of performance on a computerized adaptive test battery implications for admissions and placement https://vital.seals.ac.za/vital/access/manager/Repository/vital:11030 Thu 13 May 2021 04:00:43 SAST ]]> An investigation into the possible neuroprotective properties of phenytoin https://vital.seals.ac.za/vital/access/manager/Repository/vital:3780 Thu 13 May 2021 04:00:04 SAST ]]> Distributed control applications using local area networks: a LAN based power control system at Rhodes University https://vital.seals.ac.za/vital/access/manager/Repository/vital:5461 Thu 13 May 2021 03:37:19 SAST ]]> Assessing the effectiveness of project management practices in the South African communications industry https://vital.seals.ac.za/vital/access/manager/Repository/vital:10918 Thu 13 May 2021 03:37:14 SAST ]]> Action research : exploring the use [of] print media as a resource in the teaching of English as a second language https://vital.seals.ac.za/vital/access/manager/Repository/vital:2376 Thu 13 May 2021 03:21:41 SAST ]]> Assessing the need for specific services for HIV/AIDS affected people using participatory needs assessment processes https://vital.seals.ac.za/vital/access/manager/Repository/vital:713 Thu 13 May 2021 03:20:14 SAST ]]> Elucidation and manipulation of the Hydantoin-Hydrolysing Enzyme System of Agrobacterium tumefaciens RU-OR for the Biocatalytic production of D-amino acids https://vital.seals.ac.za/vital/access/manager/Repository/vital:3916 Thu 13 May 2021 03:16:52 SAST ]]> Exploring the perceived value of work as part of psychosocial rehabilitation of the state patient : Komani Hospital, Queenstown https://vital.seals.ac.za/vital/access/manager/Repository/vital:5953 Thu 13 May 2021 02:36:04 SAST ]]> An investigation to determine the readiness of management at selected manufacturing organisations in the Buffalo City area to manage the HIV/AIDS epidemic https://vital.seals.ac.za/vital/access/manager/Repository/vital:10906 Thu 13 May 2021 02:22:55 SAST ]]> Accelerated carbon dioxide deliming of cattle hides and sheepskins https://vital.seals.ac.za/vital/access/manager/Repository/vital:3918 Thu 13 May 2021 02:17:58 SAST ]]> Chemical studies of selected chromone derivatives https://vital.seals.ac.za/vital/access/manager/Repository/vital:4434 Thu 13 May 2021 02:00:59 SAST ]]> Aspects pertinent to the provision of sustainable water supply projects in the Eastern Cape Province: a case study of Nomzamo Water Supply Project https://vital.seals.ac.za/vital/access/manager/Repository/vital:5952 Thu 13 May 2021 01:34:30 SAST ]]> Economic impact of international labour migration on Lesotho's development, 1986-1998: towards an international labour migration policy for the Southern African region https://vital.seals.ac.za/vital/access/manager/Repository/vital:1058 Thu 13 May 2021 01:32:41 SAST ]]> A critical investigation into the managerial implications of inclusive education https://vital.seals.ac.za/vital/access/manager/Repository/vital:1477 Thu 13 May 2021 01:16:39 SAST ]]> An assessment of the impact of the black village communities, their associated land-use and related practices on water quality of the Kat River in the Eastern Cape, South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:4810 Thu 13 May 2021 01:07:19 SAST ]]> An investigation of the management and leadership experiences of female school principals in the Ondangwa education regions https://vital.seals.ac.za/vital/access/manager/Repository/vital:1653 Thu 13 May 2021 01:06:18 SAST ]]> An investigation into the possible neuroprotective role of antidepressant drugs https://vital.seals.ac.za/vital/access/manager/Repository/vital:3792 Thu 13 May 2021 00:49:52 SAST ]]> An analysis of the trawl and longline fisheries for Merluccius capensis off the west coast of South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:5218 Thu 13 May 2021 00:48:32 SAST ]]> De-scribing the Timaeus: a transgression of the (phal) logocentric convention that discourse has only one form, language https://vital.seals.ac.za/vital/access/manager/Repository/vital:10763 Thu 13 May 2021 00:44:58 SAST ]]> Detection of neurotransmitters using metallophthalocyanines as electrocatalysts https://vital.seals.ac.za/vital/access/manager/Repository/vital:4435 Thu 13 May 2021 00:36:20 SAST ]]> Aphid (Sitobion yakini) investigation shows thin-walled sieve tubes in barley (Hordeum vulgare L) to be more functional than thick-walled sieve tubes https://vital.seals.ac.za/vital/access/manager/Repository/vital:6526 Thu 11 Aug 2022 07:06:05 SAST ]]> Foucauldian feminism: the implications of governmentality https://vital.seals.ac.za/vital/access/manager/Repository/vital:6261 Sat 20 Apr 2024 09:12:45 SAST ]]> Economic security and the social science literature on teenage pregnancy in South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:6253 Sat 20 Apr 2024 09:12:09 SAST ]]> A comparison of anthropogenic and elephant disturbance on Acacia xanthophloea (fever tree) populations in the Lowveld, South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:43753 26 %. The degree of harvesting on private land was relatively low, with the majority of trees having been harvested at rates of less than 10 % of the stem below 2 m. Despite this, ringbarking had occurred (4 %). The basal diameters and heights were significantly lower in the protected population than in the harvested one, suggesting that over time elephant impact was the more severe disturbance. Acacia xanthophloea exhibited high resilience to disturbance, with all the elephant damaged trees and harvested individuals surviving. However, the mean bark thickness measured in local markets (6.3±1.4 mm) was significantly lower than that measured in either the harvested (12.4±1.0 mm) or the KNP (10.3±0.8 mm) populations. As harvesters tend to select the largest individuals in a population to maximise their financial returns, this could mean that smaller individuals are being harvested, and/or bark is not being given sufficient time to grow back after harvesting. Acacia xanthophloea outside protected areas thus need to be monitored and the management improved, preferably in conjunction with the resource users. In addition, traditional healers, those selling medicinal plants and other members of the community need to continue to be encouraged to cultivate this fast growing species.]]> Mon 19 Jul 2021 09:22:41 SAST ]]> An assessment of the efficacy of two lysine microencapsulation techniques to determine the quantitative lysine requirement of the South African abalone, Haliotis midae L https://vital.seals.ac.za/vital/access/manager/Repository/vital:44197  0.05). The failure of the crystalline L-lysine to illicit growth and nutritional responses is discussed.]]> Mon 04 Dec 2023 09:28:53 SAST ]]> A bi-directional SOAP/SMS gateway service https://vital.seals.ac.za/vital/access/manager/Repository/vital:6600 Fri 09 Feb 2024 15:54:51 SAST ]]>