https://vital.seals.ac.za/vital/access/manager/Index ${session.getAttribute("locale")} 5 The development of a cultural family business model of good governance for Greek family businesses in South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:1163 Wed 30 Mar 2022 14:38:05 SAST ]]> South African farm wages and working conditions: with special reference to the Albany district, 1957 to 1977 https://vital.seals.ac.za/vital/access/manager/Repository/vital:1028 Wed 23 Jun 2021 09:01:39 SAST ]]> The fishes of Tristan Da Cunha and Gough Island (South Atlantic), and the effects of environmental seasonality on the biology of selected species https://vital.seals.ac.za/vital/access/manager/Repository/vital:5284 Wed 16 Feb 2022 11:03:49 SAST ]]> Incidence of porcine circovirus type 2 and porcine parvoviruses in swine herds of some communities in Eastern Cape, South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:34820 Wed 12 May 2021 23:22:26 SAST ]]> A framework for cloud computing adoption in small and medium-sized enterprises : a case of the Accra - Tema metropolis in Ghana https://vital.seals.ac.za/vital/access/manager/Repository/vital:39713 Wed 12 May 2021 23:21:49 SAST ]]> A qualitative assessment of the achievement of gender equality under education for all (EFA) goals : study of Lagos State, Nigeria https://vital.seals.ac.za/vital/access/manager/Repository/vital:34357 Wed 12 May 2021 23:13:59 SAST ]]> Structural studies on some capsular antigens from escherichia coli and klebsiella https://vital.seals.ac.za/vital/access/manager/Repository/vital:3730 Wed 12 May 2021 20:50:58 SAST ]]> Construction material logistics management: the case of north-central Nigeria https://vital.seals.ac.za/vital/access/manager/Repository/vital:38179 Wed 12 May 2021 20:50:21 SAST ]]> A lean production approach to materials management in the Nigerian construction industry https://vital.seals.ac.za/vital/access/manager/Repository/vital:39408 Wed 12 May 2021 20:27:28 SAST ]]> Possible futures for the Republic of South Africa towards 2055 https://vital.seals.ac.za/vital/access/manager/Repository/vital:24294 Wed 12 May 2021 20:14:19 SAST ]]> Public procurement reforms in Ghana: impact on the growth of the local construction industry https://vital.seals.ac.za/vital/access/manager/Repository/vital:28285 Wed 12 May 2021 20:10:07 SAST ]]> Learning styles, availability, and utilization of instructional materials as correlates of grade 6 learners’ mathematics performance in Buffalo city https://vital.seals.ac.za/vital/access/manager/Repository/vital:39066 0.05), and gender (∆R2 = .000, ∆F (1,1223) = .036, p>0.05) emerged as better predictors. The study further iv revealed that, Grade six learners with visual learning style ( = 13.242, SD = 5.565) had the best performance in Mathematics at Buffalo City, followed by learners with auditory learning style ( = 12.996, SD = 3.883), and learners with Kinaesthetic learning style ( = 11.525, SD =3.800). The study concluded that one of the most fundamental issues to consider in improving Mathematics performance is the understanding of the learners’ learning styles and effective use of appropriate instructional materials for teaching Mathematics.]]> Wed 12 May 2021 19:59:29 SAST ]]> Molecularly imprinted polymeric materials for adsorptive removal of nitrogen compounds from fuel oils https://vital.seals.ac.za/vital/access/manager/Repository/vital:30542 Wed 12 May 2021 19:54:48 SAST ]]> Commensal bacteria belonging to the Staphylococcus Acinetobacter and Stenotrophomonas genera as reservoirs of antibiotic resistance determinants in the environment of Nkonkobe Municipality, Eastern Cape Province , South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:30551 2 for Staphylococcus species, Acinetobacter species and Stenotrophomonas maltophilia suggest that they have arisen from high-risk sources where antibiotics are in constant arbitrary use resulting in high selective pressure. The presence of tetracycline resistance genes in Acinetobacter species justifies the observed phenotypic resistance to oxytetracycline and intermediate resistance to minocycline. High phenotypic resistance and the presence of some resistance genes in Staphylococcus species is a possible threat to public health and suggests animals to be important reservoirs of antibiotic resistance determinants in the environment. Indiscriminate use of antibiotics induces this kind of antibiotic resistance and should be discouraged. Personal hygiene is encouraged as it reduces the load of Acinetobacter species contacted from the environment that may be difficult to control. Commensal Stenotrophomonas maltophilia are as important as their clinical counterparts due to their roles in opportunistic infection, antibiotic resistance and their associated genes, especially sul gene. Personal hygiene is hereby advocated especially when in contact with soil, plants and plants’ rhizospheric soil]]> Wed 12 May 2021 19:45:00 SAST ]]> The tropical environment and malaria in southwestern Nigeria, 1861 – 1960 https://vital.seals.ac.za/vital/access/manager/Repository/vital:30605 Wed 12 May 2021 19:34:18 SAST ]]> Integrating information and communications technology (ICT) into teaching and learning: the case of mathematics, science and technology education in one higher education institution https://vital.seals.ac.za/vital/access/manager/Repository/vital:16224 Wed 12 May 2021 19:32:39 SAST ]]> Synergistic potententials and isolation of bioactive compounds from the extracts of two helichrysum species indigenous to the Eastern Cape province https://vital.seals.ac.za/vital/access/manager/Repository/vital:11268 5 mg/ml for all the extracts. Average log reductions in viable cell counts for all the extracts ranged between 0.1 Log10 and 7.5 Log10 cfu/ml after 12 h interaction at 1 × MIC and 2 × MIC. Most of the extracts were rapidly bactericidal at 2 × MIC achieving a complete elimination of most of the test organisms within 12 h exposure time. The effect of combinations of the crude extracts of H. pedunculatum leaves and eight antibiotics was investigated by means of checkerboard and time-kill methods. In the checkerboard method, synergies of between 45.83-56.81 percent were observed and this is independent of Gram reaction, with combinations in the aqueous extract yielding largely antagonistic interactions (18.75 percent). The time kill assay also detected synergy that is independent of Gram reaction with a ≥ 3Log10 potentiation of the bactericidal activity of the test antibiotics. We conclude that the crude leaf extracts of H. pedunculatum could be potential source of broad spectrum antibiotics resistance modulating compounds. The interactions between crude extracts of H. longifolium in combination with six first-line antibiotics using both the time-kill and the checkerboard methods were carried out. The time-kill method revealed the highest bactericidal activity exemplified by a 6.7 Log10 reduction in cell density against Salmonella sp. when the extract and Penicillin G are combined at ½ × MIC. Synergistic response constituted about 65 percent, while indifference and antagonism constituted about 28.33 percent and 6.67 percent in the time kill assay, respectively. The checkerboard method also revealed that the extracts improved bactericidal effects of the antibiotics. About 61.67 percent of all the interactions were synergistic, while indifference interactions constituted about 26.67 percent and antagonistic interactions was observed in approximately 11.66 percent. The in vitro antioxidant property and phytochemical constituents of the aqueous crude leaf extracts of H. longifolium and H. pedunculatum was investigated. The scavenging activity on superoxide anions, DPPH, H2O2, NO and ABTS; and the reducing power were determined, as well as the flavonoid, proanthocyanidin and phenolic contents of the extracts. The extracts exhibited scavenging activity in all radicals tested due to the presence of relatively high total phenol and flavonoids contents in the extracts. Our findings suggest that H. longifolium and H. pedunculatum are endowed with antioxidant phytochemicals and could serve as a base for future drugs. Bioactivity-guided fractionation of the leaves of H. longifolium and H. pedunculatum yielded two known compounds. From the n-hexane fraction of H. longifolium a compound was isolated (Stigmasterol) and from the ethyl acetate fraction of H. pedunculatum another compound (β-sitosterol) was isolated. The compounds were isolated and identified using various techniques. The antimicrobial, anti-inflammatory, antioxidant, analgesic and anti-pyretic activities of these compounds have been reported in literatures. In general, the experiments and tests conducted in this study appear to have justified the folkloric medicinal uses of H. longifolium and H. pedunculatum for the treatment of stress related ailments and wound infections and make a substantial contribution to the knowledge base of the use of herbal medicine for the treatment of the microbial infections.]]> Wed 12 May 2021 19:21:16 SAST ]]> Towards theorizing human resource development in South Africa: a critical analysis and the development of a tool to facilitate improved understanding and practice https://vital.seals.ac.za/vital/access/manager/Repository/vital:16130 Wed 12 May 2021 19:05:44 SAST ]]> Financial literacy training in the small, medium and microenterprises sector : effect on business growth in the Eastern Cape, South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:39684 Wed 12 May 2021 19:03:13 SAST ]]> Strategies to facilitate the use of birth care provided by skilled birth attendants in the rural areas of Ghana https://vital.seals.ac.za/vital/access/manager/Repository/vital:30541 Wed 12 May 2021 18:44:24 SAST ]]> Conflict related sexual violence against males:recognition by and responses of humanitarian organizations in Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:39605 Wed 12 May 2021 18:39:49 SAST ]]> Enhancing the role of the Kaizen suggestion tool in South African lean automotive companies of the Eastern Cape https://vital.seals.ac.za/vital/access/manager/Repository/vital:8644 Wed 12 May 2021 18:38:39 SAST ]]> Quantification of the cross-sectoral impacts of waterweeds and their control in Ghana https://vital.seals.ac.za/vital/access/manager/Repository/vital:5748 Wed 12 May 2021 18:28:57 SAST ]]> Multivariate morphometric analysis and behaviour of honeybees (Apis Mellifera L.) in the southern regions of Ethiopia https://vital.seals.ac.za/vital/access/manager/Repository/vital:5616 Wed 12 May 2021 18:24:47 SAST ]]> Balanced scorecard components as predictors of service performance management in first bank Nigeria plc 2009 – 2014 https://vital.seals.ac.za/vital/access/manager/Repository/vital:11721 Wed 12 May 2021 18:23:13 SAST ]]> A linguistic account of quantifiers in English and their place in the development of some modern approaches to syntax and semantics https://vital.seals.ac.za/vital/access/manager/Repository/vital:20966 Wed 12 May 2021 18:22:52 SAST ]]> The role of family structure and financial socialisation in influencing students' financial capabilities https://vital.seals.ac.za/vital/access/manager/Repository/vital:29531 Wed 12 May 2021 18:21:22 SAST ]]> Effect of processing on the efficacy and safety of Solanum Aculeastrum Dunal berries https://vital.seals.ac.za/vital/access/manager/Repository/vital:11302 Wed 12 May 2021 18:20:05 SAST ]]> Investigating the experiences of grade 8 English first additional language learners within an English home language classroom: a case study https://vital.seals.ac.za/vital/access/manager/Repository/vital:30050 Wed 12 May 2021 18:19:39 SAST ]]> A theoretical model for successful management of revenue for beneficiary communities of renewable energy companies in South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:21351 Wed 12 May 2021 18:03:03 SAST ]]> Molecular studies on cholera and non-cholera causing vibrio pathogens isolated from some water resources and aquatic animals in Eastern Cape Province, South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:34283 Wed 12 May 2021 17:58:29 SAST ]]> A multi-stakeholder approach to productivity improvement in the South African construction industry https://vital.seals.ac.za/vital/access/manager/Repository/vital:28902 Wed 12 May 2021 17:54:31 SAST ]]> Biodiversity conservation and rural livelihoods across four nature reserves in the Eastern Cape Province, South Africa: Striving towards a balance between livelihoods and conservation https://vital.seals.ac.za/vital/access/manager/Repository/vital:37649 Wed 12 May 2021 17:51:01 SAST ]]> The psycho-social functioning and experiences of children in child-headed households in Gauteng Province, South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:35651 Wed 12 May 2021 17:36:05 SAST ]]> The coordination chemistry of Rhenium(V) with multidentate no-donor ligands https://vital.seals.ac.za/vital/access/manager/Repository/vital:10370 Wed 12 May 2021 17:22:09 SAST ]]> The adoption of employee share ownership plans (ESOPs) in Nigeria https://vital.seals.ac.za/vital/access/manager/Repository/vital:27312 Wed 12 May 2021 17:05:54 SAST ]]> The implementation of inclusion policy for learners with special education needs in primary schools in Fort beafort district :Towards a rights based approach to education https://vital.seals.ac.za/vital/access/manager/Repository/vital:29413 Wed 12 May 2021 16:52:31 SAST ]]> Maintenance management systems of on-campus student hostels at Nigerian universities https://vital.seals.ac.za/vital/access/manager/Repository/vital:9710 Wed 12 May 2021 16:45:59 SAST ]]> Apparent digestibility coefficients of feed ingredients and essential amino acid requirements of dusky kob (Argyrosomus japonicus) https://vital.seals.ac.za/vital/access/manager/Repository/vital:24014 Wed 12 May 2021 16:35:23 SAST ]]> A best-practice guideline for facilitating adherence to anti-retroviral therapy for persons attending public hospitals in Ghana https://vital.seals.ac.za/vital/access/manager/Repository/vital:27256 Wed 12 May 2021 16:35:05 SAST ]]> Prevalence of Escherichia coli O157:H7 in water and meat and meat products and vegetables sold in the Eastern Cape Province of South Africa and its impact on the diarrhoeic conditions of HIV/AIDS patients https://vital.seals.ac.za/vital/access/manager/Repository/vital:11263 Wed 12 May 2021 16:31:22 SAST ]]> Removal and recovery of gold and platinum from aqueous solutions utilising the non-viable biomass Asolla filiculoides https://vital.seals.ac.za/vital/access/manager/Repository/vital:3894 Wed 12 May 2021 16:06:52 SAST ]]> An investigation of the attitudes of South African Police Service management with respect to the viability of computer-assisted training in the Eastern Cape Province https://vital.seals.ac.za/vital/access/manager/Repository/vital:8190 Wed 12 May 2021 15:57:39 SAST ]]> In vivo toxicological evaluation of peptide conjugated gold nanoparticles for potential application in colorectal cancer diagnosis https://vital.seals.ac.za/vital/access/manager/Repository/vital:42050 Wed 12 May 2021 15:09:56 SAST ]]> Analyses of Retail and Transport Geography of Liquefied Petroleum Products in Ibadan metropolis, Nigeria https://vital.seals.ac.za/vital/access/manager/Repository/vital:40090 .05). The model chi-square value of 43.47 (approximately 44% ) was significant. Thus, the indication is that the model has a good fit in predicting the possibility of a fuel retail outlet being located in the core or peripheral zone of the metropolis as determined by the explanatory variables (the independent variables accounted for about 44% of possible factors which determined whether a fuel retail outlets is located either within the core or peripheral zones of the metropolis. The remaining 56% are factors not considered in the study). The result gotten from the in depth interview sessions corroborated the findings from the tested hypothesis. The third objective was to examine the effects which the supply chain technique employed (either vertically integrated model or third-party arrangement) has on the achievement of efficient and effective distribution of the products. In order to achieve this objective, all the 389 registered members of Petroleum Tanker Drivers (PTD) association who are members of the PTD in the metropolis were sampled, 265 (around 70%) of the distributed questionnaires were retrieved and used for the analysis. In depth interview sessions were also conducted with three different managers of the three major conglomerates in the downstream sector of the Nigerian petroleum sector. The result of one-way between subjects (ANOVA) which was conducted to compare differences in the management and performances of haulage services outsourced to the 3PLS and those run under VIM showed that there was a significant effect of ownership type on management performance (F (2,262) = 60.26, p<.05). The null hypothesis was therefore rejected while the alternate hypothesis was accepted. The findings from the interview sessions posted similar results. The fourth and final objective was to analyze the effect that the socio-economic attributes of the participants (haulers and managers of retail outlets) involved in the distribution of xxvi petroleum products has on the safe, efficient and cost-effective distribution of product and this was done through the use of descriptive statistics, inferential statistics and incisive analysis of the interview sessions. A total number of 265 (70%) out of the 389 registered members of Petroleum Tanker Driver Association (PTDA) participated in the study. Multiple regression analysis (MRA) was used to test this hypothesis. The result from the statistical analysis show that the use of stimulant, work condition, marital status and educational attainment/literacy level have joint influence on compliance (R2 = 0.31, F (4,260) = 29.72, p<.05). On the basis of the foregoing, the hypothesis is thus accepted. The result from the interview sessions confirmed the existence of strong relationship between the explanatory variables and the hypothetical dependant variable. The study recommended a review of the planning processes guiding the establishment of fuel retail outlets. The study also advocated that retailers should endeavour to have stronger control over the supply chain of their products this could done by investing more in VIM rather than outsourcing such functions to 3PLs. This will help in better business performances. Government agencies in charge of monitoring drug abuse among haulers are advised to be more proactive by the duo of prevention and punishment strategies. This should include advocacy campaign against drug abuse. Different ranges of punishments should also be meted out for individual haulers found culpable.]]> Wed 12 May 2021 15:06:55 SAST ]]> Commercial maritime higher education needs in South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:42111 Wed 12 May 2021 15:04:32 SAST ]]> Elucidating Tuta absoluta (Meyrick) invasion and enhancing its management in Eastern Africa : spread, socio-ecological impacts, and potential of a newly imported larval parasitoid for classical biological control Eastern in Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:41920 Wed 12 May 2021 15:01:32 SAST ]]> Effect of service and collaborative learning strategies on students’ environmental knowledge in selected junior secondary schools in Oyo State, Nigeria https://vital.seals.ac.za/vital/access/manager/Repository/vital:40736 .05, partial η2 = 0.00). Based on these findings, it was recommended that teachers should adopt service learning and collaborative learning strategies in the teaching of environmental concepts and problems in Social Studies in order to improve students’ performance in Social Studies. Teachers should facilitate the use of service learning and collaborative learning strategies in schools to improve students’ environmental problem-solving skills and their achievement in the subject. Teaching institutions should not only include service learning and collaborative learning strategies in their curriculum but should endeavour to provide practical experience for pre-service teachers to be well grounded and equipped on the use of these strategies.]]> Wed 12 May 2021 14:46:14 SAST ]]> The role of custodial grandparents in psychosocial well-being of adolescents from single parents in Buffalo City Municipality of Eastern Cape, South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:41994 Wed 12 May 2021 14:35:26 SAST ]]> Genetic diversity, resistance profile of hiv and risk assessment of mother-to-child transmission in pregnant women on antiretroviral therapy in the Eastern Cape, South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:40183 Wed 12 May 2021 14:32:23 SAST ]]> An examination of practices and experiences of teacher educators in the supervision of a national early childhood home based programme https://vital.seals.ac.za/vital/access/manager/Repository/vital:41695 Wed 12 May 2021 14:30:28 SAST ]]> Synthesis, characterization and evaluation of photophysical and electrochemical properties of ruthenium(II) complexes for dye-sensitized solar cells https://vital.seals.ac.za/vital/access/manager/Repository/vital:41363 Wed 12 May 2021 14:25:59 SAST ]]> Antidiabetic and toxicological properties of Dianthus thunbergii (Caryophyllaceae) roots and Hypoxis argentea (Hypoxidaceae) corms https://vital.seals.ac.za/vital/access/manager/Repository/vital:40606 Wed 12 May 2021 14:20:28 SAST ]]> Commercial maritime higher education needs in South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:40117 Wed 12 May 2021 14:02:44 SAST ]]> Design of immunosensor for the detection of C-reactive protein using oriented antibody immobilization https://vital.seals.ac.za/vital/access/manager/Repository/vital:41010 Wed 12 May 2021 14:00:32 SAST ]]> Design of Immunobiosensors for Detection of Tumor-Associated Anti-P53 Autoantibodies: Method Development https://vital.seals.ac.za/vital/access/manager/Repository/vital:41002 Wed 12 May 2021 13:59:29 SAST ]]> Exploring learners’ proficiency in stoichiometry and attitudes towards science through Process Oriented Guided Inquiry Learning (POGIL) intervention https://vital.seals.ac.za/vital/access/manager/Repository/vital:42474 Wed 12 May 2021 13:51:58 SAST ]]> Participatory mapping, learning and change in the context of biocultural diversity and resilience https://vital.seals.ac.za/vital/access/manager/Repository/vital:1689 Tue 22 Nov 2022 10:29:59 SAST ]]> Household food insecurity and its association with psychological well-being of pregnant women in Ghana: the role of selected psychosocial factors https://vital.seals.ac.za/vital/access/manager/Repository/vital:39286 Thu 13 May 2021 16:25:01 SAST ]]> Catalytic activities of metallophthalocyanines towards detection and transformation of pollutants https://vital.seals.ac.za/vital/access/manager/Repository/vital:4427 Thu 13 May 2021 13:48:05 SAST ]]> A management model for human settlements: a case study of Nigeria and South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:39403 Thu 13 May 2021 08:54:11 SAST ]]> The impact of child sexual abuse (CSA) on the school life experiences and academic performance of adult CSA survivors https://vital.seals.ac.za/vital/access/manager/Repository/vital:9478 Thu 13 May 2021 08:13:02 SAST ]]> An experimental study of self-regulated learning with mildly gifted learners in grade 3 mathematics https://vital.seals.ac.za/vital/access/manager/Repository/vital:36623 Thu 13 May 2021 08:05:54 SAST ]]> A structural investigation of the sulphated polysaccharide from Aeodes ulvoidea Schmitz https://vital.seals.ac.za/vital/access/manager/Repository/vital:4437 Thu 13 May 2021 07:35:25 SAST ]]> Plastochron index - an indicator of plant structure and function a case study using Pisum sativum L https://vital.seals.ac.za/vital/access/manager/Repository/vital:4183 Thu 13 May 2021 07:33:33 SAST ]]> The evolution of the Lepilemuridae-Cheirogaleidae clade https://vital.seals.ac.za/vital/access/manager/Repository/vital:35989 Thu 13 May 2021 07:31:09 SAST ]]> The design, synthesis and antiplasmodial activity of a series of halogenated fosmidomycin analogues and hybrid drugs https://vital.seals.ac.za/vital/access/manager/Repository/vital:28538 Thu 13 May 2021 07:11:33 SAST ]]> Customer satisfaction with the guesthouse experience in Ghana https://vital.seals.ac.za/vital/access/manager/Repository/vital:21036 Thu 13 May 2021 06:54:53 SAST ]]> Anti-diabetic and phytochemical analysis of sutherlandia frutescens extracts https://vital.seals.ac.za/vital/access/manager/Repository/vital:20441 Thu 13 May 2021 06:50:39 SAST ]]> Characterisation of dissimilar friction stir welds between 5754 Aluminium alloy and C11000 copper https://vital.seals.ac.za/vital/access/manager/Repository/vital:9629 75 percent joint efficiency). High Vickers microhardness values were measured at the joint interfaces, which corresponded with the intermetallic compounds. The Energy Dispersive Spectroscopy analysis revealed the presence of thin layers of intermetallics in nanoscale at the interfacial regions. The diffractograms of the X-Ray Diffraction analysis showed small peaks for intermetallics in some of the welds. Low electrical resistivities were measured at the joint interfaces. The statistical analysis showed that the downward vertical force, (Fz) can significantly influence the resulting weld qualities. An overall summary of the analysis of the weld qualities - with respect to the shoulder diameter tools employed showed that the 18 mm shoulder diameter tool is most appropriate among the three shoulder diameters considered, and a process window of medium spindle speed of 950 rpm and low-to-medium feed rate between 50 and 150 mm/min is established for FSW of Aluminium and Copper. Welds produced at 1200 rpm and 300 mm/min with low heat input did not have intermetallics formed at the joint interface.]]> Thu 13 May 2021 06:36:12 SAST ]]> Rural-urban migration and its impact on rural development in Nigeria https://vital.seals.ac.za/vital/access/manager/Repository/vital:39714 Thu 13 May 2021 06:27:44 SAST ]]> Lead-radium dating of two deep-water fishes from the southern hemisphere, Patagonian toothfish (Dissostichus eleginoides) and Orange Roughy (Hoplostethus atlanticus) https://vital.seals.ac.za/vital/access/manager/Repository/vital:5295 1.0 dpm.g⁻¹). An analysis revealed ontogenetic differences in radium-226 uptake that may be attributed to changes in habitat or diet. Radiometric age from otolith core studies was used to describe a radium-226 uptake time-series for some species, which revealed interesting patterns over long periods. This synopsis provides information on the uptake of radium-226 to otoliths from an environmental perspective, which can be used as a basis for future studies.]]> Thu 13 May 2021 06:26:57 SAST ]]> Peer group supervision as an adjunct to individual supervision: an investigation of models of learning https://vital.seals.ac.za/vital/access/manager/Repository/vital:2922 Thu 13 May 2021 06:07:09 SAST ]]> Inmate incarceration and rehabilitation : a cross sectional study of rehabilitation programmes and facilities in correctional centres in North Western Nigeria https://vital.seals.ac.za/vital/access/manager/Repository/vital:35215 0.05). This study recommends that it is imperative for the Nigerian government to make more efforts with the provision of adequate rehabilitation programmes and facilities in the two correctional centres and correctional centres across the country as an exploration of existing literature reveals that most correctional centres in Nigeria lacked basic facilities for inmate rehabilitation as inmates were idle during incarceration.]]> Thu 13 May 2021 05:54:12 SAST ]]> Young veterans, not always social misfits: a sociological discourse of Liberian transmogrification experiences https://vital.seals.ac.za/vital/access/manager/Repository/vital:3316 Thu 13 May 2021 05:43:26 SAST ]]> Construction material logistics management: the case of North-Central Nigeria https://vital.seals.ac.za/vital/access/manager/Repository/vital:38132 Thu 13 May 2021 05:24:24 SAST ]]> Between the 'sectional' and the 'national' : oil, grassroots discontent and civic discourse in Nigeria https://vital.seals.ac.za/vital/access/manager/Repository/vital:3294 Thu 13 May 2021 05:01:37 SAST ]]> Development of InSb/GaSb quantum dots by MOVPE https://vital.seals.ac.za/vital/access/manager/Repository/vital:30537 B ± 0.1ᵒ and (111) ± 0.1ᵒ] using similar growth conditions yielded a higher dot density on the (100) substrate compared to the (111) substrate. This was attributed to the presence of terraces/atomic steps induced by the misorientation on the (100) substrate, which invariably gives rise to increased adsorption and an enhanced sticking coefficient of adatoms. Studies on the influence of a buffer layer on the morphology of uncapped dots showed that the shape and size of the dots are sensitive to the thickness of the buffer layer. In some case a corrugated buffer surface resulted, which introduced order in the arrangement of the dots, which formed preferentially inside the troughs. An increase in the V/III ratio from 1.0 to 3.0 was found to reduce the areal density of the QDs, while an analysis of the diameter histograms showed a narrowing of the size distribution with an increase in V/III ratio. The larger size distribution at low V/III was ascribed to the increase in indium species and the increased indium adatom migration length. This leads to increased dot density and nucleation sites, and thus triggers an increase in the conversion of tiny QDs into thermodynamically more suitable larger dots via coalescence. However, as the V/III ratio increased, the number of indium adatoms available for growth on the surface reduced, which automatically led to a decrease in the migration length of indium species which is unfavourable for the production of nucleation sites and to a decrease in dot density. Low growth rates were found to be beneficial for the growth of a high density (~5×1010cm-2) of QDs. Photoluminescence (PL) analysis of the capped samples at low temperature (~10 K), using an excitation power of 2 mW, showed a PL peak at ∼732 meV. Upon an increase in laser power to 120 mW, a blue shift of ∼ 8 meV was noticed. This emission typically persisted up to 60–70 K. An increase in the number of InSb QD-layers, was observed to cause an increase in the luminescence spectral line width and a long-wavelength shift of the PL lines, together with an enhancement in the strength of the PL emission. However, high resolution transmission electron microscopy (HRTEM) of the capped dots revealed the formation of an InGaSb quantum well-like structure, ∼10 nm thick, which was responsible for the PL signal mentioned above. The absence of QDs in the capped sample was attributed to inter-diffusion of Ga and In during the deposition of the cap layer, giving rise to a quantum well (QW) instead of the intended QDs. The presence of threading dislocations and stacking faults were also observed in the TEM micrographs of the samples containing multilayers, which can account for the fast quenching of the PL emission with increasing temperature from these samples. Theoretical simulations of the band alignment, wave functions and energy levels were in good agreement with the data collected from the PL spectra of the samples.]]> Thu 13 May 2021 04:56:31 SAST ]]> An evaluation of leadership characteristics required to meet the demands of a strategic change process in the automative cluster in the Eastern Cape region https://vital.seals.ac.za/vital/access/manager/Repository/vital:9341 Thu 13 May 2021 04:41:25 SAST ]]> Thaumatotibia leucotreta (Meyrick) (Lepidoptera: Tortricidae) population ecology in citrus orchards: the influence of orchard age https://vital.seals.ac.za/vital/access/manager/Repository/vital:28213 Thu 13 May 2021 04:33:28 SAST ]]> Active learning strategies used by teachers during English reading comprehension lessons in six selected primary schools in Nigeria https://vital.seals.ac.za/vital/access/manager/Repository/vital:32838 Thu 13 May 2021 03:55:05 SAST ]]> Surface properties and electrocatalytic applications of 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