https://vital.seals.ac.za/vital/access/manager/Index ${session.getAttribute("locale")} 5 https://vital.seals.ac.za/vital/access/manager/Repository/vital:28506 Wed 31 May 2023 15:41:19 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:27975 Wed 17 May 2023 13:00:18 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28308 Wed 15 Sep 2021 12:38:53 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:29807 Wed 13 Mar 2024 10:05:29 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28349 Wed 12 May 2021 23:17:40 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:26870 Wed 12 May 2021 23:06:43 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:33916 Wed 12 May 2021 22:57:31 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:33435 direction perpendicular to the coating/ZIRLO interface. The corrosion testing at various temperatures from 400 to 900 ℃ for 30 minutes showed that the TiZrN coating oxidises slowly and retained its microstructure, composition and crystallinity up to 600 ℃. At higher temperatures above 600 ℃, the TiZrN layer completely oxidised to a non-protective TiZr-oxide layer and resulted in rapid corrosion of the underlying ZIRLO substrate. The rapid corrosion was not observed in the uncoated ZIRLO sample for all temperatures. The results of samples subjected to annealing treatment at 500 ℃ in an oxygen atmosphere at various times up to 24 hours revealed that the TiZrN layer oxidises faster than ZIRLO. This was confirmed by sub-cubic and sub-parabolic oxide growth kinetics observed in the uncoated ZIRLO which are slower than the parabolic kinetics of TiZrN coated samples. In all coated samples, the spallation was observed near the edges of the samples. The spallation was caused by rapid corrosion of the underlying ZIRLO substrate which resulted from the penetration of oxygen ions between the TiZrN coating and ZIRLO substrate along the edges of the samples. In pure steam for 30 days at 360 ℃, a complete loss of the TiZrN layer occurred but the results show that the coating might have delayed the corrosion of ZIRLO. In summary, corrosion resistance of nc-TiZrN coated ZIRLO was lower than that of uncoated ZIRLO. The study shows that the failure of TiZrN coatings leads to rapid corrosion of the underlying ZIRLO substrate which was not observed on the uncoated ZIRLO. It is not yet understood why the presence TiZrN coatings reduced the oxidation resistance of ZIRLO.]]> Wed 12 May 2021 22:53:06 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:33432 Wed 12 May 2021 22:40:52 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:27400 Wed 12 May 2021 22:26:01 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28203 Wed 12 May 2021 21:01:40 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28422 Wed 12 May 2021 21:00:47 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28072 Wed 12 May 2021 20:53:20 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:31183 0.70). There was significant difference in pH in the year 2017 between the Bay West wetlands and the reference wetland (p<0.05; df=19; f= 3.56; n=3) and in 2018 (p<0.01; df=22; f= 8.90; n=3). No significant difference was found between the wetlands for dissolved oxygen. TDS between the wetlands was found to be significantly different in the year 2017 (p<0.01; df=23; f= 44.16; n=3) and 2018 (p<0.05; df=22; f=2.62; n=3), where conductivity and salinity returned the same p value for 2017 and 2018 as TDS respectively. There was a significant difference in chlorophyll a between the Bay West wetlands in 2017 (p<0.05; df=20; f=3.29; n=3) and Wetland Seven measured eutrophic at 22.45 mg/L-1. Remote sensing red band values and the field sample absorption values were highly correlated at R2= 0.5. Chlorophyll a content of wetland water correlated with NDVI data at R2= 0.6. Thus, remote sensing proved to be a successful estimator for wetlands health analysis and a proxy for wetland management. These results yielded an environmental management plan where monitoring water quality via chlorophyll a indicated health levels of the wetlands via trophic state.]]> Wed 12 May 2021 20:22:00 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28481 Wed 12 May 2021 20:11:23 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:31006 Wed 12 May 2021 20:10:15 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:29929 Wed 12 May 2021 20:04:39 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28503 Wed 12 May 2021 20:02:27 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28161 Wed 12 May 2021 20:01:04 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:29966 0.05) differences between the 1592 and EW phytoplankton biomass. However, the MPB biomass showed significant (p<0.05) differences between the two sediments (EW high, 1592 low) and the experiments, respectively. In the winter experiment, the 1592 sediment had high phytoplankton biomass compared to EW, the reverse was observed for the MPB biomass. In summer experiment, similar results were observed in terms of phytoplankton biomass. For the MPBs, 1592 had greater biomass for all treatments compared to EW. The phytoplankton community for both field samples and experiments was dominated by chlorophytes (>50 %), followed by cyanophytes and euglenophytes (with cryptophytes in summer experiment) for both field and experiments. The MPB community was dominated by bacillariophytes (55 %) and chlorophytes (25 %) in the 1592 sediments and this was also the case with EW sediments bacillariophytes (70 %), although cyanophytes (15 %) made up the remainder of the MPB community. The 1592 sediments supported higher diatom abundances under the HSAV compared to the same treatment from the EW wetland suggesting that possibly grain size or texture might be responsible. In contrast, sediments from EW under LSAV conditions showed higher diatom cell numbers possibly indicating that increased water depth has the propensity to support greater diatom assemblages compared with the same water level for sediments from 1592. The results indicate that microalgae community is influenced by sediment type more than it is by water level. From this study it was also established that microalgae were able to reemerge from their dormancy state upon inundation and that tank experiments were successful in simulating natural ephemeral wetland conditions. The findings from this study will add to the available baseline data on microalgal dynamics in the ephemeral wetlands in South Africa, especially in semi-arid areas. This information can be valuable in enhancing our understanding regarding the role of microalgae in ephemeral wetlands in order to conserve them.]]> Wed 12 May 2021 19:50:51 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:34303 Wed 12 May 2021 19:45:50 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:31504 Wed 12 May 2021 19:42:59 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:29813 Wed 12 May 2021 19:39:48 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28046 2mm) under BSE imagery were identified, with the abundance of gypsum salts (below surface level) and rock coatings indicating active sulphuric acid weathering, in western Dronning Maud Land, Antarctica. Were mechanical processes faster than chemical, weathering rinds and solution features on silicate rocks would be uncommon in the Antarctic, periglacial landscape. However, this is not the case as the existence of these landforms implies that chemical weathering may occur faster than mechanical weathering processes (Pope et al., 1995). In a changing world, one needs to monitor these processes at a micro-scale in order to fully understand how periglacial environments react to global climatic changes, and the subsequent impacts on these sensitive environments.]]> Wed 12 May 2021 19:32:00 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:29965 Wed 12 May 2021 19:28:04 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:27811 Wed 12 May 2021 19:16:30 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:30835 Wed 12 May 2021 19:12:00 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:33784 Wed 12 May 2021 19:01:50 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:27040 Wed 12 May 2021 18:33:38 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28474 Wed 12 May 2021 18:27:48 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28433 Wed 12 May 2021 17:54:50 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:27807 Wed 12 May 2021 17:38:22 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28367 116 Moz of endowment and contribute to making south-west Ghana the greatest Paleoproterozoic gold province in the world. Gold deposits in the Kumasi Basin are shear zone hosted and mineralisation ranges from disseminated to massive sulphide refractory deposits, to free milling quartz vein style deposits. Structural relationships and age dating indicate that most deposits are genetically related and were formed during a single episode of gold mineralisation during the D4 NNW-SSE crustal shortening deformation event of the Eburnean Orogeny (2125 – 1980 Ma). The understanding of structural controls on mineralisation is critical for exploration success as it allows exploration to focus on areas where these structural controls exist. This study uses a mineral systems approach to understand the relationship between the geodynamic history and structural controls on gold mineralisation in the Kumasi Basin at various scales, and define targeting criteria which can be applied for the purpose of developing predictive exploration models for making new discoveries in the Asanko Gold Mine camp located in the Asankrangwa Belt. The study used a quantitative analysis to establish residual endowment potential in the Asankrangwa Belt, providing the basis for a business model and resulting exploration strategy. Once established, a Fry autocorrelation analysis was applied to identify trends in deposit and camp spatial distribution to which critical geological processes were ascribed. Observed trends were mapped from multi-scale geophysical data sets and through interpretation of existing geophysical structure models, and structural criteria for targeting orogenic gold deposits at the regional and camp scales were developed. Results show that different structural controls on mineralisation act at the regional and camp scale. At the regional scale the distribution of gold camps was found to be controlled by fundamental N-S and NW-SE basement structures with gold camps forming where they intersect NE-SW first and second order structural corridors. At the Asanko Gold Mine camp scale, deposit distribution was found to be related to the intersection between major second order D3 NE-SW shear zones, minor third order D4 NNE-SSW brittle faults, and cryptic NW-SE upward propagating basement structures. In addition to these structural criteria, deposits in the Asanko Gold Mine camp were found to be aligned along a NNE-SSW lineament caused by the interaction between the N-S basement structure and the NE-SW trending Asankrangwa Belt shear corridor.]]> Wed 12 May 2021 17:27:00 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28201 Wed 12 May 2021 17:17:07 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28211 Wed 12 May 2021 16:44:41 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:27014 Wed 12 May 2021 16:39:54 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:29895 Wed 12 May 2021 16:34:57 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:29526 Wed 12 May 2021 16:12:20 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:29840 Wed 12 May 2021 15:58:17 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:33451 Wed 12 May 2021 15:54:16 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:40024 Wed 12 May 2021 15:09:01 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:39997 Wed 12 May 2021 14:39:56 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:40014 Wed 12 May 2021 14:37:56 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:40016 Wed 12 May 2021 14:09:56 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:40366 Wed 12 May 2021 14:08:04 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28387 Tue 16 May 2023 14:59:05 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:27470 Tue 13 Jun 2023 09:02:08 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:27799 Thu 29 Sep 2022 14:18:31 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28489 Thu 25 May 2023 13:00:06 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28386 Thu 22 Jul 2021 15:55:21 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:27615 Thu 18 May 2023 09:02:06 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:39385 Thu 13 May 2021 15:40:17 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:31629 Thu 13 May 2021 14:14:04 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:30647 Thu 13 May 2021 13:17:33 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:39122 Thu 13 May 2021 08:55:22 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28153 Thu 13 May 2021 08:34:59 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28044 Thu 13 May 2021 07:39:35 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:29713 Thu 13 May 2021 07:38:23 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:33756 Thu 13 May 2021 07:38:03 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28523 Thu 13 May 2021 07:20:26 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28392 Thu 13 May 2021 07:14:39 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:27211 Thu 13 May 2021 07:11:15 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:35400 Thu 13 May 2021 06:41:37 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:35484 Thu 13 May 2021 06:26:25 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28404 Thu 13 May 2021 06:13:40 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:31225 Thu 13 May 2021 06:11:08 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:34048 Thu 13 May 2021 05:53:12 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:35376 Thu 13 May 2021 05:52:42 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28406 Thu 13 May 2021 05:46:15 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:27816 Thu 13 May 2021 05:41:05 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:33655 Thu 13 May 2021 05:33:52 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28431 Thu 13 May 2021 05:30:51 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:27112 0.8 at baseline and week 8) in the PEx group throughout the intervention. Medium between-group effect sizes (d>0.5) were noted for PEx BMI and waist circumference measures at all time points. Further, although not significant, the large within-group effect size (d=-0.84) between baseline and week 8 for PEx systolic blood pressure, suggested the 9 mm Hg was meaningful. The same time period also indicated a large within-group effect size (d=-0.8) for PEx dynamic balance, and a medium Cohen’s d for (d=0.57) PEx static balance. Conclusion: The local population of young adult females was found to be significantly healthier than those of comparable national samples. Further, Pilates participation significantly improved lumbo-pelvic stability and muscular endurance with meaningful changes in systolic blood pressure, and balance in previously sedentary young, adult females. Body mass was also maintained.]]> Thu 13 May 2021 05:25:08 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:30624 Thu 13 May 2021 05:24:13 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:35364 Thu 13 May 2021 05:22:05 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:27812 Thu 13 May 2021 05:20:12 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:38924 Thu 13 May 2021 05:08:08 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:32516 Thu 13 May 2021 05:07:29 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:31243 Thu 13 May 2021 05:02:01 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:32962 Thu 13 May 2021 04:46:25 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28397 Thu 13 May 2021 04:20:19 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:27364 Thu 13 May 2021 04:05:45 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28514 Thu 13 May 2021 03:32:04 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28419 Thu 13 May 2021 03:17:54 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:34309 Thu 13 May 2021 02:00:02 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:33248 Thu 13 May 2021 01:52:59 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:27802 Thu 13 May 2021 01:47:20 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28105 Thu 13 May 2021 01:32:49 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:32395 Thu 13 May 2021 01:11:24 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:29816 Thu 13 May 2021 00:55:43 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:30937 Thu 13 May 2021 00:33:13 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:29507 Thu 13 May 2021 00:22:19 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28155 Thu 13 May 2021 00:03:45 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:27805 Thu 13 Jul 2023 12:34:14 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:27791 Thu 01 Sep 2022 09:29:45 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28216 Thu 01 Jun 2023 09:58:06 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28417 Mon 22 May 2023 15:47:55 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:27617 Fri 19 May 2023 09:37:03 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:27038 Fri 17 Sep 2021 10:11:50 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28204 Fri 06 Aug 2021 11:56:45 SAST ]]>