https://commons.ru.ac.za/vital/access/manager/Index ${session.getAttribute("locale")} 5 https://commons.ru.ac.za/vital/access/manager/Repository/vital:3238 Wed 26 Oct 2022 16:17:53 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:3233 Wed 26 Oct 2022 16:17:27 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:3377 Wed 12 Oct 2022 12:05:50 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:1155 Wed 12 Jul 2023 08:28:48 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:6624 Wed 10 Aug 2022 06:16:59 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:28605 Tue 13 Jun 2023 12:32:30 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5362 Thu 29 Sep 2022 14:15:59 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5361 Thu 29 Sep 2022 14:15:25 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5977 Thu 13 May 2021 16:59:13 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:4693 Thu 13 May 2021 16:06:23 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:2881 Thu 13 May 2021 15:46:00 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:4464 Thu 13 May 2021 14:21:31 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:1098 Thu 13 May 2021 13:22:37 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:3371 Thu 13 May 2021 13:17:27 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:1979 Thu 13 May 2021 11:32:22 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:4105 Thu 13 May 2021 10:52:51 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5152 Thu 13 May 2021 10:14:56 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:26580 99 % in selectively extracting the metalloporphyrins. The impact of the template on the affinity of recognition for NTPP was evaluated. The results showed that the NTPP adsorption capacity increased as the molar ratio of NTPP to styrene was increased from 1:1 to 3:1. The optimal ratio of template to functional monomer which yielded the best specific affinity and highest recovery (99.9 %) was 3:1. The effects of trifluoroacetic acid (TFA), dichloromethane (DCM), dimethyl sulphoxide (DMSO), pentane (PEN) on electro-spinnability of the polymer solutions and the morphological appearance of the nanofibers were investigated. The imprinted nanofibers exhibited the same selectivity specialism for both NTPP and VTPP. A remarkable stability in relation to reusability was observed when imprinted nanofibers were used, as they could be reused nine times without incurring any significant loss in removal efficiency. The results were validated by analysing a certified reference material. The imprinted sorbents were therefore found to be selective sorbents that are well suited for handling trace metals in organic media.]]> Thu 13 May 2021 09:54:20 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:3227 Thu 13 May 2021 09:34:50 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:1326 Thu 13 May 2021 09:30:16 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:3539 Thu 13 May 2021 09:27:37 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:4778 Thu 13 May 2021 08:53:57 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:3231 Thu 13 May 2021 08:23:03 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:19990 Thu 13 May 2021 08:18:56 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:1199 Thu 13 May 2021 08:18:24 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:1198 Thu 13 May 2021 08:11:48 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:1971 Thu 13 May 2021 08:07:44 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:4266 Thu 13 May 2021 08:07:04 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5074 Thu 13 May 2021 07:43:59 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:3232 Thu 13 May 2021 07:41:37 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5976 Thu 13 May 2021 07:40:08 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:28540 Thu 13 May 2021 07:35:41 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:29380 20% habitat loss due to invasion). Upstream invasion by centrarchids isolated and fragmented P. afer populations into headwater refugia, while top down invasion by salmonids excluded B. trevelyani from invaded, more pristine stream reaches, by forcing the species into degraded unsuitable lower stream reaches. Predation also disrupted population processes such as adult dispersal for P. afer, and centrarchid-invaded zones acted as demographic sinks, where adults dispersing through invaded reaches were rapidly depleted. While the Mandela lineage of P. afer exhibited little within or between drainage genetic structuring, B. trevelyani was >4% divergent between drainages, and up to 2% divergent between streams within the Keiskamma River system (Chapter 7). The distribution of genetic diversity for B. trevelyani also indicated that the loss of diversity was imminent without immediate conservation interventions. This thesis has provided conclusive evidence that native fishes are vulnerable to invasion and that non-native predatory fishes have significant impacts on native fishes in Eastern Cape headwater streams. If management and conservation measures are implemented, the unwanted introduction and spread of non-native fishes may be restricted, allowing native fishes opportunities for recovery.]]> Thu 13 May 2021 07:28:56 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:4700 Thu 13 May 2021 07:28:05 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5155 Thu 13 May 2021 07:27:29 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5051 Thu 13 May 2021 07:26:32 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:4113 Thu 13 May 2021 07:20:46 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:3379 Thu 13 May 2021 07:15:33 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5388 Thu 13 May 2021 07:10:52 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5969 Thu 13 May 2021 07:08:53 SAST ]]> 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https://commons.ru.ac.za/vital/access/manager/Repository/vital:3370 Thu 13 May 2021 06:25:53 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:3528 Thu 13 May 2021 06:25:15 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:3254 Thu 13 May 2021 06:23:19 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:1991 Thu 13 May 2021 06:20:53 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:2003 Thu 13 May 2021 06:16:30 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:7883 Thu 13 May 2021 06:15:41 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:1201 Thu 13 May 2021 06:14:45 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:3211 Thu 13 May 2021 06:11:58 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5983 Thu 13 May 2021 06:08:21 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:1987 Thu 13 May 2021 06:07:45 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:1154 Thu 13 May 2021 06:00:53 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:3646 Thu 13 May 2021 06:00:50 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5882 Thu 13 May 2021 05:49:20 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:1982 Thu 13 May 2021 05:47:38 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:3365 Thu 13 May 2021 05:45:16 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:3236 Thu 13 May 2021 05:44:54 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:3228 Thu 13 May 2021 05:41:23 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:1097 Thu 13 May 2021 05:40:21 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:1968 Thu 13 May 2021 05:36:23 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:3245 Thu 13 May 2021 05:33:10 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5059 Thu 13 May 2021 05:24:10 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:911 Thu 13 May 2021 05:23:14 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5543 Thu 13 May 2021 05:21:09 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:1976 Thu 13 May 2021 05:19:48 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5057 Thu 13 May 2021 05:16:32 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5517 Thu 13 May 2021 05:10:35 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:3243 Thu 13 May 2021 05:06:54 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:26609 2.5Ga) and are located to the south and east of Lake Victoria on the Tanzania craton. The Tanzania Craton is surrounded by Usagaran 1.9 Ga rocks (the east African orogenic belt (EAO) better known as the Mozambique belt) to the east and the Ubendian belt to the south and west. Published reports show that the eastern part of the Tanzania Craton is dominated by the fragments of Archaean rocks. Metamorphism along East Africa and the Tanzania Craton is due to several geological events. These geological events include the intrusion of granites in the Archaean Tanzania Craton (3 Ga), subduction of ocean plate resulted to the formation of Usagaran belt (1.9 Ga), opening and closure of Mozambique Ocean, which resulted in the formation of the Mozambique belt between 700 – 800 Ma and the Pan African orogeny at 640 – 620 Ma, which is associated with the formation of Gondwana. It is believed that fragments from the Archaean Tanzania craton were re - metamorphosed during these events. The Handeni project (the focus of this thesis) is located in the northern portion of the eastern part of the Usagaran belt (1.9 Ga) comprising the eastern part of Archaean Tanzania Craton. The area is characterized by Proterozic rocks of basaltic composition. The documented 2.7 Ga rocks at the Kilindi Handeni Superterrane at the northern part of the Usagaran belt correlate well with 2.7 Ga of Nyanzian rocks of Archaean Tanzania craton. The Handeni project area is geologically dominated by metamorphosed and deformed units of quartzofeldspathic gneisses, migmatitic gneiss, garnet silicified rock, garnetiferous amphibolite, garnetiferous granulite, graphitic schist and hornblende pyroxenite. Intensive deformation features that were developed include folds (sheath folds, micro and macro scales), faults, shears and regional thrusts. This thesis focuses on identifying the protolith of the rocks, alteration minerals, and metamorphic assemblages in the project area in order to understand the timing of gold mineralization. Geological investigation of core, ore petrology and mineralogy, mineral composition by using JEOL microprobe analysis and XRF analysis of bulk rocks were utilized. All the analytical work was done at the Geology laboratory, Rhodes University. Petrographic analysis shows that the rocks sampled in the study area are characterized by alteration minerals such as calcite, dolomite and sericite. Sulphide minerals including chalcopyrite, pyrrhotite, pyrite, pentlandite and gersdorffite were identified. Gold mineralization is associated with disseminated sulphides in association with trace amounts of base metals. Four rock types were proposed as host rocks for the mineralization, namely garnet silicified rock with superimposed quartz veins, garnetiferous amphibolite, garnetiferous granulite and hornblende pyroxenite. Fold troughs, filled fractures associated with episodes of folding, quartz veins and shear zones are suggested as gold precipitation sites. The presence of high grade metamorphic rocks containing gold, intermediate to low grade assemblages with sulphides and associated hydrothermal alteration as well as a complex deformation history suggests that the Handeni mineralization took place over an extended time period stretching from a ductile to a brittle environment.]]> Thu 13 May 2021 05:05:57 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:2382 Thu 13 May 2021 05:01:16 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:1203 Thu 13 May 2021 04:56:44 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:5849 Thu 13 May 2021 04:53:41 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:3524 Thu 13 May 2021 04:48:25 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:1985 Thu 06 Apr 2023 14:25:46 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:28722 Thu 01 Feb 2024 09:42:41 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:29390 Sat 04 Dec 2021 12:43:33 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:45440 Mon 24 Apr 2023 14:44:54 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:45408 Mon 24 Apr 2023 13:21:05 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:47448 Mon 24 Apr 2023 12:10:59 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:45410 Mon 24 Apr 2023 11:43:19 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:6622 Fri 10 May 2024 13:00:17 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:25956 Fri 10 May 2024 12:57:53 SAST ]]>