https://vital.seals.ac.za/vital/access/manager/Index ${session.getAttribute("locale")} 5 https://vital.seals.ac.za/vital/access/manager/Repository/vital:49114 Wed 30 Mar 2022 16:22:35 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:49055 Wed 30 Mar 2022 10:25:36 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:49035 Wed 30 Mar 2022 09:57:32 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:49026 Wed 30 Mar 2022 07:44:29 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:43639 Wed 30 Jun 2021 11:27:41 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:62984 Wed 29 Mar 2023 11:29:02 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:46549 Wed 23 Feb 2022 18:14:57 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:51102 Wed 18 May 2022 11:56:56 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:46732 Wed 16 Feb 2022 14:32:15 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:46726 Wed 16 Feb 2022 13:41:40 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:46708 Wed 16 Feb 2022 12:24:41 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:46703 Wed 16 Feb 2022 11:21:40 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:46686 Wed 16 Feb 2022 11:07:48 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:72380 Wed 15 May 2024 13:00:15 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:52064 Wed 15 Jun 2022 11:41:27 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:2085 Wed 12 Oct 2022 08:28:23 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4902 Wed 12 May 2021 19:10:06 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4909 11Oppm) are the most evolved. They are tholeiitic andesites which display fairly limited compositional variation. It is likely that more evolved compositions are present in other areas where the porphyritic lavas which characterize this unit are better developed. The overlying Orkney lavas are characterized by 110ppm>Zr>90ppm. They are tholeiitic andesites of similar composition to the Alberton lavas, but have lower incompatible element levels, higher siderophile element levels, and are of extremely uniform composition. The uppermost Loraine/Edenville lavas range from magnesian tholeiites to tholeiitic andesites. They are distinguished by Zr< 90ppm, and contain the most primitive magmas af the Witwatersrand triad, with up to 17,5% MgO, 2600ppm Cr, 600ppm Ni and M-values up to 77. The most primitive liquids evolved by 38% fractional crystallization of orthopyroxene ∓ chromite, followed by 35% fractional crystallization of an extract containing clinopyroxene and plagioclase. The absence of olivine precipitation is a result of the inherently high Si0₂ content of the magma. The Loraine/Edenville, Orkney and Alberton lavas do not lie on a common liquid line of descent, but are probably consanguinous. The Platberg Group overlies the Kliprivierberg Group, and has a coarse-clastic sedimentary unit, the Kameeldoorns Formation, at the base. Three petrographically distinct porphyritic lava sequences overlie the Kameeldoorns Formation, namely the informal "Goedgenoeg formation", the Makwassie quartz-feldspar porphyries and the Rietgat Formation. Despite petrographic differences, the Goedgenoeg and Rietgat lavas are chemically indistinguishable and thus form a single magma-type. The Makwassie porphyries are dacitic in composition with a high proportion of feldspar and quartz phenocrysts. Rational variation trends are attributed to a nett loss of Si0₂ during secondary alteration. The porphyries are probably of crustal origin. The Goedgenoeg/Rietgat lavas display unusual chemistry and a broad, irrational compositional spectrum. They contain very high incompatible element levels, high nonnative quartz, as well as high MgO, M-values, Cr and Ni relative to the other tholeiitic andesites of the Witwatersrand triad. It is tentatively suggested that they are hybrid magmas containing both crust and mantle components, the former possibly represented by the Makwassie porphyries. Field evidence suggests that Platberg volcanism commenced directly after Klipriviersberg volcanism ceased, and was accompanied by a period of enhanced tectonic activity. The Platberg lavas thus probably reflect a crustal melting cycle associated with the Klipriviersberg magmatic event. The Allanridge lavas are the youngest rocks of the Witwatersrand triad. They are separated from the Platberg Group by a unit of flat-lying sediments, the Bothaville Formation, which was deposited after an extended period of peneplanation. The Allanridge lavas form a separate magma-type. They are tholeiitic andesites of similar composition to the Alberton lavas, but have higher incompatible element levels and are not consanguinous. The compositional similarities amongst the basic magma-types of the Witwatersrand triad suggests that all were generated in an hydrous mantle. Interelement ratio differences between the various magma-types nevertheless support the concept that the mantle was chemically heterogeneous during the early Proterozoic.]]> Wed 12 May 2021 18:23:53 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5967 Wed 12 May 2021 15:47:34 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:46308 Wed 09 Feb 2022 11:29:10 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:46310 38 weeks) regardless of the APGAR score. Placentas were submitted for histopathology and used for detection of Ureaplasmaspp. by culture (U9 broth, MycoDuo kits;BioRad) and PCR (DNA was extracted from culture and homogenized placental tissue). Antibiotic susceptibility profiles of Ureaplasmaspp isolates were determined by the SIR Antibiogram kit (BioRad) and microbroth dilution method. Molecular mechanisms of resistance were ascertained by PCR amplification of target genes. Placentas were sent to National Health Laboratory Servicesfor routine histopathology. Next generation sequencing was performed on 16S rRNA amplicons from placental DNA for analysis of microbial diversity.]]> Wed 09 Feb 2022 10:54:08 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:46302 Wed 09 Feb 2022 10:12:11 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:51916 Wed 08 Jun 2022 12:18:05 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:51915 Wed 08 Jun 2022 11:29:12 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:58305 Wed 04 Jan 2023 13:06:43 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:69381 Tue 31 Oct 2023 10:00:35 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:69380 Tue 31 Oct 2023 09:45:25 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:52594 Tue 28 Jun 2022 13:27:44 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:45759 Tue 25 Jan 2022 19:17:51 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:53364 Tue 19 Jul 2022 12:03:39 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:48352 Tue 15 Mar 2022 14:02:39 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:46617 Tue 15 Feb 2022 14:58:47 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:46618 Tue 15 Feb 2022 13:41:44 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:46619 Tue 15 Feb 2022 12:03:49 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:46603 Tue 15 Feb 2022 10:04:52 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:60168 Tue 13 Dec 2022 12:10:43 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:47926 Tue 08 Mar 2022 13:20:24 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:46305 Tue 08 Feb 2022 13:55:42 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:46303 Tue 08 Feb 2022 12:45:34 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:46307 Tue 08 Feb 2022 12:31:34 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:46284 Tue 08 Feb 2022 10:32:34 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:60249 Tue 03 Jan 2023 13:44:56 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:47442 Tue 01 Mar 2022 10:53:40 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:46025 3000 plastic particles/day), with the relatively natural Sundays River to showing minimal evidence of river macroplastic (<100 plastic particles/day). The types of plastic were noted using the RIMMEL app (premier African implementation), enabling proportional comparison of different plastic litter types to be completed.]]> Tue 01 Feb 2022 14:37:46 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:46023 Tue 01 Feb 2022 13:48:39 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:52375 Thu 23 Jun 2022 08:33:46 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:46306 Thu 20 Oct 2022 12:38:48 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:45680 Thu 20 Jan 2022 19:03:38 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:44733 Thu 14 Oct 2021 09:29:24 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:1363 Thu 13 May 2021 06:32:07 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:1358 Thu 13 May 2021 05:34:04 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:549 Thu 13 May 2021 04:51:37 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:2756 Thu 13 May 2021 04:39:16 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:2527 Thu 13 May 2021 03:00:52 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5964 Thu 13 May 2021 02:28:11 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:11655 Thu 13 May 2021 01:12:45 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:45144 Thu 11 Nov 2021 15:41:30 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:45131 Thu 11 Nov 2021 14:03:30 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:46304 Thu 10 Feb 2022 19:55:02 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:46311 Thu 10 Feb 2022 18:49:33 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:62423 130%. This assessment ultimately provides a platform for regional governance development at the basin scale and Earth Stewardship science in East Africa. These changes require transdisciplinary action from researchers to civil society. The AAC provides the foundation for understanding the dynamics of the systems that support life across broader spatial and temporal resolutions in Africa, highlighting the need for future generations to build socio-ecological resilience to anticipate challenges such as biodiversity loss posed by climate change and excessive land cover change.]]> Thu 09 Mar 2023 15:39:54 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:62418 Thu 09 Mar 2023 15:18:58 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:51990 Thu 09 Jun 2022 17:32:36 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:51989 Thu 09 Jun 2022 16:57:43 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:71823 Thu 07 Mar 2024 09:50:42 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:70969 Thu 07 Mar 2024 09:01:13 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:49596 Thu 07 Apr 2022 10:53:38 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:49586 Thu 07 Apr 2022 10:00:36 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:49131 Thu 07 Apr 2022 09:42:49 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:63985 Thu 04 May 2023 10:37:59 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:46027 Thu 03 Feb 2022 11:49:30 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:47656 Sat 05 Mar 2022 12:11:37 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:45139 Mon 22 Nov 2021 09:20:55 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:52374 Mon 14 Nov 2022 08:43:49 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:46584 Mon 14 Feb 2022 15:39:48 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:46541 Mon 14 Feb 2022 12:03:49 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:46517 Mon 14 Feb 2022 10:36:11 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:52017 Mon 13 Jun 2022 12:24:52 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:45690 Mon 11 Jul 2022 11:36:49 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:58191 Mon 07 Nov 2022 11:07:45 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:69320 Fri 27 Oct 2023 12:29:26 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:69319 Fri 27 Oct 2023 11:36:29 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:69318 Fri 27 Oct 2023 11:22:03 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:69316 Fri 27 Oct 2023 11:15:40 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:48830 Fri 25 Mar 2022 12:24:43 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:48824 Fri 25 Mar 2022 12:03:44 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:44031 Fri 13 Aug 2021 10:53:37 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:44026 Fri 13 Aug 2021 10:25:31 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:45141 Sr>Ca. Effects of partial dissolution of and structural changes to the alumina particles at high pH cannot be excluded. In order to better understanding the different effects, it was attempted to measure the zeta potential of the slurries at different pH values. This resulted in highly positive zeta potential values over the complete pH range, without the observationof an iso-electric point. This does not fit to the observed changes in rheology and contrasts withliterature data. One explanation would be that the measurement system used is unsuitable to yield correct zeta potential values for the materials under investigation.]]> Fri 12 Nov 2021 15:48:44 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:45137 Fri 12 Nov 2021 10:47:44 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:45136 Fri 12 Nov 2021 09:09:50 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:45138 Fri 12 Nov 2021 08:27:50 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:45135 Fri 12 Nov 2021 07:52:44 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:46477 Fri 11 Feb 2022 14:49:33 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:66484 Fri 11 Aug 2023 11:43:05 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:52000 Fri 10 Jun 2022 12:04:20 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:49676 Fri 08 Apr 2022 11:00:55 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:47664 Fri 04 Mar 2022 12:24:44 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:47657 Fri 04 Mar 2022 11:35:45 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:47653 Fri 04 Mar 2022 11:00:44 SAST ]]>