https://commons.ufh.ac.za/vital/access/manager/Index ${session.getAttribute("locale")} 5 Magma flow inferred from AMS fabrics in a layered mafic sill, Insizwa, South Africa https://commons.ufh.ac.za/vital/access/manager/Repository/vital:6733 1000-m-thick layered mafic intrusion, part of the Karoo Igneous Province in South Africa. The peridotitic and gabbronoritic rocks are undeformed and mineral fabrics demonstrably result from magma flow. A horizontal, centimeter-scale model layering is visible in numerous outcrops. Plagioclase crystals are both tabular and elongated. Their preferred orientation, parallel to the layering, forms a foliation and a NW–SE lineation, respectively interpreted as the magma flow plane and flow direction. Throughout the 78 stations of this study (699 specimens), magnetic susceptibilities (K[subscript m]) range from 750 to 10,000×10[superscript (−6)] SI. The magnetic anisotropy (P[subscript j]) ranges from 1.03 to 1.08. Magnetic ellipsoids are both prolate and oblate (average T[subscript j]≈0). Anisotropy of magnetic susceptibility (AMS) fabrics are dominated by multidomain to pseudo-single domain magnetite. High-field magnetic experiments indicate that the paramagnetic contribution from the mafic silicates is less than 50 percentage for low susceptibility rock types. The anisotropy results from magnetite grain shape solely as shown by no significant increase in P[subscript j] with increasing K[subscript m]. The magnetic lineation (305°, 05°) is consistent throughout the sill at various scales and coincides with the mineral lineation in average. In contrast, the magnetic foliation (125° NE 10°) is generally perpendicular to the mineral foliation and to the layering. Several explanations for this odd configuration are discussed. The variations of magnetic parameters across the layering and field observations point to a multiple injection. The magnetic lineation is consistent with the presence of a single feeder dike situated to the SE of the sill.]]> Wed 12 May 2021 23:40:31 SAST ]]> Reengineering the business processes in small, medium and micro enterprises (SMME'S) in order to improve profitability https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10850 Wed 12 May 2021 23:24:42 SAST ]]> The registration of generic topical corticosteroid formulations in South Africa: a report https://commons.ufh.ac.za/vital/access/manager/Repository/vital:6368 Wed 12 May 2021 23:13:38 SAST ]]> A historical study of John Graham Lake and South African/United States pentecostalism https://commons.ufh.ac.za/vital/access/manager/Repository/vital:2587 Wed 12 May 2021 23:06:18 SAST ]]> Barkly East bells and the British Empire https://commons.ufh.ac.za/vital/access/manager/Repository/vital:6178 Wed 12 May 2021 22:44:39 SAST ]]> A cyclic approach to business continuity planning https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10788 Wed 12 May 2021 22:23:51 SAST ]]> Open source in South African schools : two case studies https://commons.ufh.ac.za/vital/access/manager/Repository/vital:6601 Wed 12 May 2021 20:57:44 SAST ]]> The development of a marketing plan for an emergency medical service https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10853 Wed 12 May 2021 20:13:23 SAST ]]> The relationship between three anxiety related clusters in projective drawings and anxiety and ego-strength scales of the Minnesota multiphasic personality inventory-2 https://commons.ufh.ac.za/vital/access/manager/Repository/vital:2942 Wed 12 May 2021 20:07:37 SAST ]]> Radiocarbon dates and the Late Quaternary palaeogeography of the Province of the Eastern Cape, South Africa https://commons.ufh.ac.za/vital/access/manager/Repository/vital:6693 Wed 12 May 2021 19:54:41 SAST ]]> The effects of control design and working posture on strength and work output: an isokinetic investigation https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5118 Wed 12 May 2021 19:45:01 SAST ]]> Speed-related isokinetic and psychophysical responses of female military personnel https://commons.ufh.ac.za/vital/access/manager/Repository/vital:21028 Wed 12 May 2021 19:36:12 SAST ]]> The effect of selenium in the detoxification of the microcystin hepatotoxins https://commons.ufh.ac.za/vital/access/manager/Repository/vital:11070 Wed 12 May 2021 19:26:52 SAST ]]> Terracettes and active gelifluction terraces in the Drakensberg of the Province of Eastern Cape, South Africa: a process study https://commons.ufh.ac.za/vital/access/manager/Repository/vital:6688 Wed 12 May 2021 19:21:00 SAST ]]> An investigation of the neuroprotective effects of estrogen in a model of quinolinic acid-induced neurodegeneration https://commons.ufh.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://commons.ufh.ac.za/vital/access/manager/Repository/vital:1700 Wed 12 May 2021 18:56:53 SAST ]]> The effect of energy and protein nutritional levels on production of breeding ostriches https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5805 Wed 12 May 2021 18:53:48 SAST ]]> The biotransformation of phenolic pollutants using polyphenol oxidase https://commons.ufh.ac.za/vital/access/manager/Repository/vital:3976 Wed 12 May 2021 18:46:00 SAST ]]> The relationship between the leadership, internal quality, and customer satisfaction levels of dealerships in a South African motor vehicle organisation https://commons.ufh.ac.za/vital/access/manager/Repository/vital:1185 Wed 12 May 2021 18:36:05 SAST ]]> The independent high rate algal pond as a unit operation in tertiary wastewater treatment https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4092 Wed 12 May 2021 18:30:08 SAST ]]> Selecting an appropriate process for the formulating of an operations strategy for Bridgestone/Firestone, Port Elizabeth plant, in a changed market environment https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10945 Wed 12 May 2021 18:10:45 SAST ]]> The variation of conditions of employment https://commons.ufh.ac.za/vital/access/manager/Repository/vital:11043 Wed 12 May 2021 17:56:19 SAST ]]> English in the prison services: a case of breaking the law? https://commons.ufh.ac.za/vital/access/manager/Repository/vital:6133 Wed 12 May 2021 17:38:29 SAST ]]> Physiological and perceptual responses of SANDF personnel to varying combinations of marching speed and backpack load https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5128 Wed 12 May 2021 17:30:14 SAST ]]> Asthenospheric and lithospheric sources for Mesozoic dolerites from Liberia (Africa): trace element and isotopic evidence https://commons.ufh.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://commons.ufh.ac.za/vital/access/manager/Repository/vital:2189 Wed 12 May 2021 17:21:49 SAST ]]> The development of a financial plan to partly cover the cost of frail care in a retirement village in George https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10919 Wed 12 May 2021 16:48:52 SAST ]]> The molecular microbial ecology of sulfate reduction in the Rhodes BioSURE process https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4082 Wed 12 May 2021 16:43:32 SAST ]]> Use of indigenous and indigenised medicines to enhance personal well-being: a South African case study https://commons.ufh.ac.za/vital/access/manager/Repository/vital:7106 Wed 12 May 2021 16:39:26 SAST ]]> John Jolly : the Grahamstown bell founder https://commons.ufh.ac.za/vital/access/manager/Repository/vital:6173 Wed 12 May 2021 16:35:02 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://commons.ufh.ac.za/vital/access/manager/Repository/vital:2395 Wed 12 May 2021 16:30:11 SAST ]]> The development of effective promotional strategies to market public FET/Technical Colleges in the Eastern Cape Province https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10940 Wed 12 May 2021 16:20:18 SAST ]]> 'n Kritiese evaluering na die effektiwiteit van bestuurstrategieë vir ekstensiewe wolskaapboerdery in die groter Burgersdorp omgewing https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10953 Wed 12 May 2021 16:15:27 SAST ]]> Removal and recovery of gold and platinum from aqueous solutions utilising the non-viable biomass Asolla filiculoides https://commons.ufh.ac.za/vital/access/manager/Repository/vital:3894 Wed 12 May 2021 16:06:52 SAST ]]> Open source in South African schools : two case studies https://commons.ufh.ac.za/vital/access/manager/Repository/vital:6089 Wed 12 May 2021 16:05:33 SAST ]]> A comprehensive study of the social responsibility practices of two selected financial insitutions https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10857 Wed 12 May 2021 15:47:07 SAST ]]> Workplace Reorganisation Course https://commons.ufh.ac.za/vital/access/manager/Repository/vital:42606 Wed 12 May 2021 13:49:58 SAST ]]> The influence of education on the interpretation of pharmaceutical pictograms for communicating medicine instructions: https://commons.ufh.ac.za/vital/access/manager/Repository/vital:40079 Wed 12 May 2021 13:48:17 SAST ]]> A taxonomic revision of the genus Bergeranthus Schwantes (Mesembryanthemaceae) in South Africa https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4248 Wed 07 Jul 2021 14:02:53 SAST ]]> Physical and biological variability in the Antarctic Polar Frontal Zone: report on research cruise 103 of the MV SA Agulhas https://commons.ufh.ac.za/vital/access/manager/Repository/vital:6910 Wed 05 Apr 2023 07:00:23 SAST ]]> Issues in contemporary geographical hydrology https://commons.ufh.ac.za/vital/access/manager/Repository/vital:7083 Tue 31 Aug 2021 12:45:56 SAST ]]> Iron perchlorophthalocyanine and tetrasulfophthalocyanine catalyzed oxidation of cyclohexane using hydrogen peroxide, chloroperoxybenzoic acid and tert-butylhydroperoxide as oxidants https://commons.ufh.ac.za/vital/access/manager/Repository/vital:56653 Tue 20 Sep 2022 14:39:40 SAST ]]> Accelerated sludge solubilisation under sulphate reducing conditions: the effect of hydrolytic enzymes on sludge floc size distribution and EPS composition https://commons.ufh.ac.za/vital/access/manager/Repository/vital:6455 Thu 21 Sep 2023 14:58:54 SAST ]]> Reporting indigenous knowledge: the choices they deserve the local is the global https://commons.ufh.ac.za/vital/access/manager/Repository/vital:29804 Thu 15 Jul 2021 20:34:35 SAST ]]> A case study of the language policy in practice in the foundation phase of schooling https://commons.ufh.ac.za/vital/access/manager/Repository/vital:1442 Thu 13 May 2021 13:14:16 SAST ]]> South Africa's `Rainbow People', national pride and optimism: a trend study https://commons.ufh.ac.za/vital/access/manager/Repository/vital:7114 Thu 13 May 2021 08:24:07 SAST ]]> The determination of a strategy for the implementation of learnerships in the catalytic converter canning industry in the Eastern Cape https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10851 Thu 13 May 2021 08:20:38 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://commons.ufh.ac.za/vital/access/manager/Repository/vital:10911 Thu 13 May 2021 08:17:51 SAST ]]> The impact of multi-skilling training on the paintshop production environment and its employees at Volkswagen South Africa (VWSA) https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10852 Thu 13 May 2021 08:17:50 SAST ]]> The adaptation of the Clark (1997) treatment for social phobia into a group therapy format, and a preliminary evaluation https://commons.ufh.ac.za/vital/access/manager/Repository/vital:3109 Thu 13 May 2021 07:39:05 SAST ]]> The selection paradox: selecting and evaluating trainee psychologists in the context of narrative theory https://commons.ufh.ac.za/vital/access/manager/Repository/vital:3001 Thu 13 May 2021 07:28:43 SAST ]]> The implementation of environmental education policy in Namibia: perceptions of a range of decision-makers https://commons.ufh.ac.za/vital/access/manager/Repository/vital:1563 Thu 13 May 2021 07:23:38 SAST ]]> Workshop theatre in post-apartheid South Africa : a case study https://commons.ufh.ac.za/vital/access/manager/Repository/vital:2156 Thu 13 May 2021 07:16:39 SAST ]]> The land question in South Africa, Zimbabwe and Kenya: a geographical perspective on resource endowment https://commons.ufh.ac.za/vital/access/manager/Repository/vital:6664 Thu 13 May 2021 07:07:57 SAST ]]> The medicinal chemistry of the isomers of the cyclic dipeptide: cyclo(Trp-Pro) https://commons.ufh.ac.za/vital/access/manager/Repository/vital:11023 Thu 13 May 2021 07:07:36 SAST ]]> Dublin founders of ringing bells https://commons.ufh.ac.za/vital/access/manager/Repository/vital:6174 Thu 13 May 2021 07:06:02 SAST ]]> The advantages and disadvantages of long-term collective bargaining within the Metal & Engineering Industry and Mining Industry https://commons.ufh.ac.za/vital/access/manager/Repository/vital:27745 Thu 13 May 2021 06:52:42 SAST ]]> Effect of selected physical and production traits on the tick burdens of beef cattle https://commons.ufh.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://commons.ufh.ac.za/vital/access/manager/Repository/vital:3764 Thu 13 May 2021 06:45:58 SAST ]]> Bad faith: the psychological life of a satanist who committed murder https://commons.ufh.ac.za/vital/access/manager/Repository/vital:3152 Thu 13 May 2021 06:33:02 SAST ]]> A history of confession: the dialogue between cynicism and grace in selected novels of J.M. Coetzee https://commons.ufh.ac.za/vital/access/manager/Repository/vital:2190 Thu 13 May 2021 06:28:27 SAST ]]> The investigation of the hydrolysis reaction of m-phenylene to resorcinol https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10961 Thu 13 May 2021 06:08:05 SAST ]]> New views on the Jurassic Clarens Formation: volcano-sedimentary interaction https://commons.ufh.ac.za/vital/access/manager/Repository/vital:36874 Thu 13 May 2021 05:56:33 SAST ]]> Traditional leaders in post-1996 South Africa, with particular reference to the Eastern Cape https://commons.ufh.ac.za/vital/access/manager/Repository/vital:2857 Thu 13 May 2021 05:39:23 SAST ]]> Achieving successful implementation of lean manufacturing control systems, to achieve world class status, at Ford Motor Componay of Southern Africa https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10909 Thu 13 May 2021 05:30:06 SAST ]]> Towards a broader socio-ecological education : a case study of school based curricular reform https://commons.ufh.ac.za/vital/access/manager/Repository/vital:20973 Thu 13 May 2021 05:23:13 SAST ]]> Sensorless speed estimation in three phase induction motors https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10810 Thu 13 May 2021 05:15:54 SAST ]]> Design, development and analysis of the friction stir welding process https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10809 Thu 13 May 2021 05:04:11 SAST ]]> Rumours of war : de-constructing media discourses of HIV/AIDS in South Africa https://commons.ufh.ac.za/vital/access/manager/Repository/vital:3177 Thu 13 May 2021 04:44:56 SAST ]]> Teacher responses to the Namibian education reform : a case study of two Caprivi schools https://commons.ufh.ac.za/vital/access/manager/Repository/vital:1791 Thu 13 May 2021 04:36:39 SAST ]]> Heal my heart: stories of hurt and healing from group therapy https://commons.ufh.ac.za/vital/access/manager/Repository/vital:6263 Thu 13 May 2021 04:34:21 SAST ]]> The trade in medicinal plants in the Eastern Cape Province, South Africa https://commons.ufh.ac.za/vital/access/manager/Repository/vital:6512 Thu 13 May 2021 04:28:11 SAST ]]> A workers handbook on HIV and AIDS https://commons.ufh.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://commons.ufh.ac.za/vital/access/manager/Repository/vital:3360 Thu 13 May 2021 04:15:55 SAST ]]> Alkane oxidation using metallophthalocyanine as homogeneous catalysts https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4449 Thu 13 May 2021 04:08:44 SAST ]]> Mental illness and the consciousness of freedom: the phenomenology of psychiatric labelling https://commons.ufh.ac.za/vital/access/manager/Repository/vital:6264 Thu 13 May 2021 03:58:21 SAST ]]> The establishment of an effective farming system for the Allan Waters communal area in the Eastern Cape Province https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10821 Thu 13 May 2021 03:50:11 SAST ]]> Study South Africa https://commons.ufh.ac.za/vital/access/manager/Repository/vital:28744 Thu 13 May 2021 03:44:25 SAST ]]> The development of a model on which to base franchise relationships https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10920 Thu 13 May 2021 03:28:56 SAST ]]> The growth and reproduction of the freshwater limpet Burnupia stenochorias (Pulmonata, Ancylidae), and an evaluation of its use as an ecotoxicology indicator in whole effluent testing https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5703 Thu 13 May 2021 03:25:08 SAST ]]> Action research : exploring the use [of] print media as a resource in the teaching of English as a second language https://commons.ufh.ac.za/vital/access/manager/Repository/vital:2376 Thu 13 May 2021 03:21:41 SAST ]]> Elucidation and manipulation of the Hydantoin-Hydrolysing Enzyme System of Agrobacterium tumefaciens RU-OR for the Biocatalytic production of D-amino acids https://commons.ufh.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://commons.ufh.ac.za/vital/access/manager/Repository/vital:5953 Thu 13 May 2021 02:36:04 SAST ]]> Accelerated carbon dioxide deliming of cattle hides and sheepskins https://commons.ufh.ac.za/vital/access/manager/Repository/vital:3918 Thu 13 May 2021 02:17:58 SAST ]]> Psychological resilience: the role of unconscious and conscious coping strategies in the mediation of stress in high risk occupational contexts https://commons.ufh.ac.za/vital/access/manager/Repository/vital:3092 Thu 13 May 2021 02:16:56 SAST ]]> A multivariate model of the offence behaviours of South African serial killers https://commons.ufh.ac.za/vital/access/manager/Repository/vital:3169 Thu 13 May 2021 02:00:04 SAST ]]> The evolution of online news: a comparative case study of the process of implementation at two South African news organisations https://commons.ufh.ac.za/vital/access/manager/Repository/vital:3447 Thu 13 May 2021 01:53:14 SAST ]]> The life history of selected coastal foredune species of South Africa https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4207 Thu 13 May 2021 01:26:22 SAST ]]> Leaders' and participants' perceptions of the management of the Life Science Project in Namibia https://commons.ufh.ac.za/vital/access/manager/Repository/vital:1662 Thu 13 May 2021 01:18:36 SAST ]]> A critical investigation into the managerial implications of inclusive education https://commons.ufh.ac.za/vital/access/manager/Repository/vital:1477 Thu 13 May 2021 01:16:39 SAST ]]> The remote configuration of devices within home entertainment networks https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4685 Thu 13 May 2021 00:56:50 SAST ]]> The evaluation of waste minimization/waste treatment strategies for a commercial production process of 4-methyl-3-thiosemicarbazide https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10951 Thu 13 May 2021 00:49:02 SAST ]]> An analysis of the trawl and longline fisheries for Merluccius capensis off the west coast of South Africa https://commons.ufh.ac.za/vital/access/manager/Repository/vital:5218 Thu 13 May 2021 00:48:32 SAST ]]> In the best interests of the child? : a case study of the psychological discourses of the custody decision-making process in a South African context https://commons.ufh.ac.za/vital/access/manager/Repository/vital:3153 Thu 13 May 2021 00:43:39 SAST ]]> The biology and molecular ecology of floating sulphur biofilms https://commons.ufh.ac.za/vital/access/manager/Repository/vital:4056 Thu 13 May 2021 00:37:11 SAST ]]> Process for the preparation of vanillin from a mixed m-cresol/p-cresol stream https://commons.ufh.ac.za/vital/access/manager/Repository/vital:10968 95%) and selectivities (>95%) may be obtained. However, the use of DMF, which poses a serious chronic health risk, is unacceptable in this process since the products are intended for use as food and flavouring chemicals. In view of the above the main objectives of this study were: · To find a suitable alternative solvent system, which could produce comparable results while still being economically viable; · To develop an appropriate experimental protocol in the laboratory based on the alternative solvent system; · To determine the important reaction variables by conducting statistically designed experiments; · To optimise the reaction to produce a reproducible and robust experimental protocol; and · To test the reaction thoroughly at bench-scale level and to obtain experimental data for scale-up to pilot plant The most promising alternative solvent system was a methanol/methyl acetate mixture, which produced satisfactory results in the preliminary assessment (conversion of 98.3% and selectivity of 92.0%). DMA and acetonitrile also produced promising results but were not considered for further investigation because of toxicity and cost issues. A set of statistically designed experiments was carried out on the methanol/methyl acetate solvent system where four variables were tested i.e., substrate concentration, temperature, catalyst loading, and methanol to methyl acetate volume ratio. The experimentally determined response surface model showed that the most important variable was catalyst loading (63.2%) for conversion. With respect to selectivity, the most important variables were catalyst loading (31.9%) and methanol to methyl acetate ratio (33.1%). The optimum reaction conditions were as follows: · Temperature: 120°C · Methanol:methyl acetate: 15:1 vol/vol · Catalyst loading: 8 mol % to substrate · Substrate concentration: 22 %m/m on solvent · Catalyst: Copper(I) bromide · Sodium Equivalents: 2.7 wrt substrate · Time: 3 hours The optimum conditions were tested for reproducibility in a 1 Labmax pressure reactor. Replicated reactions, two at a 10% and two at a 20% substrate concentration gave conversions and selectivities all greater than 90%. Although the reaction mixture was a slurry at these concentrations, the reactions were very fast and virtually complete within the first hour (~95% conversion). Initial scale-up studies were conducted in an 8 Parr reactor where five reactions were carried out using the optimum conditions described above. The conversion of substrate and vanillin selectivity was consistently high and compared favourably to the Labmax reactions. The average conversion was 97.3% (96.3 to 98.5%) at an average selectivity of 98.2% (97.4 to 99.1%). A study of the reaction kinetics confirmed that the reaction was first order with respect to the substrate as a plot of substrate concentration versus reaction rate gave a straight line. The rate constant was calculated as 1.1096 k(h-1). The reaction mechanism proposed for the copper assisted nucleophilic aromatic substitution involves the formation of an adduct between sodium methoxide, methyl acetate and copper(I) bromide. The formation of a transient intermediate with the substrate allows intramolecular delivery of the methoxide ion to the aryl moiety through a CuI – CuIII type cycle.]]> Thu 13 May 2021 00:19:35 SAST ]]> Naming students problems: an analysis of language-related discourses at a South African university https://commons.ufh.ac.za/vital/access/manager/Repository/vital:6086 Thu 11 Aug 2022 12:26:54 SAST ]]> A comparison of anthropogenic and elephant disturbance on Acacia xanthophloea (fever tree) populations in the Lowveld, South Africa https://commons.ufh.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 ]]> Maybe the courts are not such a Bleak House after all - or please sir, I want some more copyright https://commons.ufh.ac.za/vital/access/manager/Repository/vital:29749 Mon 13 Sep 2021 13:20:43 SAST ]]> A bi-directional SOAP/SMS gateway service https://commons.ufh.ac.za/vital/access/manager/Repository/vital:6600 Fri 09 Feb 2024 15:54:51 SAST ]]>