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 ]]> Elands River, Uitenhage https://vital.seals.ac.za/vital/access/manager/Repository/vital:13309 Wed 12 May 2021 23:07:52 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 ]]> Enon Church, inside and out, Witte River, Uitenhage https://vital.seals.ac.za/vital/access/manager/Repository/vital:12495 Wed 12 May 2021 22:58:04 SAST ]]> Gembos https://vital.seals.ac.za/vital/access/manager/Repository/vital:12507 Wed 12 May 2021 22:49:08 SAST ]]> New Unity Movement Bulletin https://vital.seals.ac.za/vital/access/manager/Repository/vital:31947 Wed 12 May 2021 22:47:30 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 ]]> Looking north to the Suurberg Enon village https://vital.seals.ac.za/vital/access/manager/Repository/vital:12492 Wed 12 May 2021 22:33:15 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 ]]> Sacramento Reserve, Schoenmakerskop, Port Elizabeth https://vital.seals.ac.za/vital/access/manager/Repository/vital:12930 Wed 12 May 2021 20:58:45 SAST ]]> New Unity Movement Presidential Address https://vital.seals.ac.za/vital/access/manager/Repository/vital:32121 Wed 12 May 2021 20:19:40 SAST ]]> N. Border of Grassridge, Uitenhage https://vital.seals.ac.za/vital/access/manager/Repository/vital:12590 Wed 12 May 2021 20:18:21 SAST ]]> Sacramento Reserve, Schoenmakerskop, Port Elizabeth https://vital.seals.ac.za/vital/access/manager/Repository/vital:12929 Wed 12 May 2021 19:52:58 SAST ]]> Church hall (right) and minister's house (left) at Enon Mission, Witte River, Uitenhage https://vital.seals.ac.za/vital/access/manager/Repository/vital:12498 Wed 12 May 2021 19:52:01 SAST ]]> Enon Church, inside and out, Witte River, Uitenhage https://vital.seals.ac.za/vital/access/manager/Repository/vital:12496 Wed 12 May 2021 19:51:48 SAST ]]> Elands River on Echodale, Lower Eland's River valley https://vital.seals.ac.za/vital/access/manager/Repository/vital:13307 Wed 12 May 2021 19:36:45 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 ]]> The land is crying for justice: a discussion document on Christianity and environmental justice in South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:29333 Wed 12 May 2021 19:17:01 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 ]]> 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 ]]> New Unity Movement Bulletin https://vital.seals.ac.za/vital/access/manager/Repository/vital:31864 Wed 12 May 2021 18:41:34 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 ]]> Far western end of Grassridge, Uitenhage https://vital.seals.ac.za/vital/access/manager/Repository/vital:12587 Wed 12 May 2021 17:54:08 SAST ]]> Sacramento Reserve, Schoenmakerskop, Port Elizabeth https://vital.seals.ac.za/vital/access/manager/Repository/vital:12928 Wed 12 May 2021 17:29:21 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 ]]> Bargaining monitor https://vital.seals.ac.za/vital/access/manager/Repository/vital:37760 Wed 12 May 2021 17:24:26 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 ]]> Enon Church, inside and out, Witte River, Uitenhage https://vital.seals.ac.za/vital/access/manager/Repository/vital:12497 Wed 12 May 2021 17:17:28 SAST ]]> View of Long Hill on Echodale farm, lower Elands River valley, Uitenhage https://vital.seals.ac.za/vital/access/manager/Repository/vital:13308 Wed 12 May 2021 17:10:44 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 ]]> 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 ]]> 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 ]]> Towards qualifications for environmental practitioners: a study of roles and competencies of entry level environmental managers https://vital.seals.ac.za/vital/access/manager/Repository/vital:51388 Tue 24 May 2022 14:58:37 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 ]]> 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 ]]> The Educational Journal https://vital.seals.ac.za/vital/access/manager/Repository/vital:34743 Thu 13 May 2021 12:30:36 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 ]]> Enon Church, inside and out, Witte River, Uitenhage https://vital.seals.ac.za/vital/access/manager/Repository/vital:12494 Thu 13 May 2021 07:15:26 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 ]]> New Unity Movement Bulletin https://vital.seals.ac.za/vital/access/manager/Repository/vital:31859 Thu 13 May 2021 07:04:45 SAST ]]> The advantages and disadvantages of long-term collective bargaining within the Metal & Engineering Industry and Mining Industry https://vital.seals.ac.za/vital/access/manager/Repository/vital:27745 Thu 13 May 2021 06:52:42 SAST ]]> Gembos https://vital.seals.ac.za/vital/access/manager/Repository/vital:12508 Thu 13 May 2021 06:47:58 SAST ]]> The Educational Journal https://vital.seals.ac.za/vital/access/manager/Repository/vital:34882 Thu 13 May 2021 06:44:52 SAST ]]> Clifftop path on Sacramento trail, Schoenmakerskop https://vital.seals.ac.za/vital/access/manager/Repository/vital:12925 Thu 13 May 2021 06:44:08 SAST ]]> Looking northwards up the Witte River to Enon village, Uitenhage, with the Suurberg in the background https://vital.seals.ac.za/vital/access/manager/Repository/vital:12493 Thu 13 May 2021 06:33:31 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 ]]> Entrance to cave in low dune in wide open valley in Sacramento Reserve, Schoenmakerskop, Port Elizabeth https://vital.seals.ac.za/vital/access/manager/Repository/vital:12933 Thu 13 May 2021 06:26:35 SAST ]]> Advanced organiser development course https://vital.seals.ac.za/vital/access/manager/Repository/vital:37483 Thu 13 May 2021 06:11:18 SAST ]]> Only remainder of much larger Parson's Vlei at Bridgemead, Port Elizabeth, after exceptional winter rains https://vital.seals.ac.za/vital/access/manager/Repository/vital:12377 Thu 13 May 2021 06:07:27 SAST ]]> Far western end of Grassridge, Uitenhage https://vital.seals.ac.za/vital/access/manager/Repository/vital:12588 Thu 13 May 2021 05:30:53 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 ]]> Only remainder of much larger Parson's Vlei at Bridgemead, Port Elizabeth, after exceptional winter rains https://vital.seals.ac.za/vital/access/manager/Repository/vital:12375 Thu 13 May 2021 05:28:12 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 ]]> View at western end of Grassridge, Uitenhage https://vital.seals.ac.za/vital/access/manager/Repository/vital:12589 Thu 13 May 2021 05:03:48 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 ]]> 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 ]]> 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 ]]> Clifftop path on Sacramento trail, Schoenmakerskop https://vital.seals.ac.za/vital/access/manager/Repository/vital:12926 Thu 13 May 2021 03:55:10 SAST ]]> NUM Education strategic plan https://vital.seals.ac.za/vital/access/manager/Repository/vital:33867 Thu 13 May 2021 03:47:17 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 ]]> The advantages and disadvantages of long-term collective bargaining within the Metal & Engineering Industry and Mining Industry https://vital.seals.ac.za/vital/access/manager/Repository/vital:33465 Thu 13 May 2021 03:16:07 SAST ]]> The Educational Journal https://vital.seals.ac.za/vital/access/manager/Repository/vital:34865 Thu 13 May 2021 03:06:29 SAST ]]> Eland's River, on Echodale farm, Uitenhage https://vital.seals.ac.za/vital/access/manager/Repository/vital:13310 Thu 13 May 2021 03:05:18 SAST ]]> Petunia https://vital.seals.ac.za/vital/access/manager/Repository/vital:12550 Thu 13 May 2021 02:56:10 SAST ]]> Sacramento Reserve, Schoenmakerskop, Port Elizabeth https://vital.seals.ac.za/vital/access/manager/Repository/vital:12927 Thu 13 May 2021 02:44:30 SAST ]]> Photo taken from bridge over narrowgauge railway between Bridgemead & Rowallan Park (in distance) https://vital.seals.ac.za/vital/access/manager/Repository/vital:12376 Thu 13 May 2021 02:29:07 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 ]]> The Educational Journal https://vital.seals.ac.za/vital/access/manager/Repository/vital:34737 Thu 13 May 2021 01:35:18 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 ]]> 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 ]]> Gembos Hotel https://vital.seals.ac.za/vital/access/manager/Repository/vital:12509 Thu 13 May 2021 01:01:39 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 ]]> The Educational Journal https://vital.seals.ac.za/vital/access/manager/Repository/vital:36368 Thu 13 May 2021 00:27:20 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 ]]> 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 ]]>