https://vital.seals.ac.za/vital/access/manager/Index ${session.getAttribute("locale")} 5 https://vital.seals.ac.za/vital/access/manager/Repository/vital:10470 Wed 12 May 2021 23:34:38 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10501 Wed 12 May 2021 23:06:15 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10568 Wed 12 May 2021 22:23:59 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10734 Wed 12 May 2021 22:22:36 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10310 Wed 12 May 2021 22:19:58 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10525 with bonding partial dislocations of the type 1/6 <121> by using image simulation. The SFs were also found to be predominantly extrinsic in nature by using HRTEM analysis of SFs viewed edge-on. Also both bright and dar-field images of SFs on inclined planes exhibited symmetrical and complementary fringe contrast images. This is a result of the anomalous absorption ratio of SiC lying between that of Si and diamond. The analysis of the annealed and unannealed irradiated β-SiC yielded no evidence of radiation damage or change in the crystal structure of the β-SiC. This confirmed that β-SiC is a radiation resistant material. The critical proton dose for the creation of small dislocation loops seems to be higher than for other compound semiconductors with the zinc-blende structure.]]> Wed 12 May 2021 21:04:28 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10523 Wed 12 May 2021 20:28:35 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10400 Wed 12 May 2021 20:17:48 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10611 Wed 12 May 2021 19:47:52 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10586 Wed 12 May 2021 18:59:32 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10587 Wed 12 May 2021 18:52:10 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10706 Wed 12 May 2021 18:48:31 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10716 Wed 12 May 2021 18:28:51 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10703 Wed 12 May 2021 18:22:15 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10396 Wed 12 May 2021 17:59:22 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10720 Wed 12 May 2021 17:48:46 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10521 Wed 12 May 2021 16:45:37 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10700 Wed 12 May 2021 16:23:30 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10402 Wed 12 May 2021 16:16:45 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10398 650°C). The transformation of linalool to geraniol/nerol using mineral acids was found to be dominated by secondary reactions such as dehydration and cyclisation, resulting in poor product selectivities and yields. On the other hand, organometallic complexes, in particular vanadium-based complexes (e.g. (OV(OBu)3) produced satisfactory results in the preliminary assessment (conversion of 79.8 percent and selectivity of 98.3 percent). A set of statistically designed experiments was carried out on the (VO(BuO)3 + [(Bu)4N+]OH¯) catalyst system where three variables were tested, i.e. substrate concentration, temperature, and catalyst loading. The selected model for conversion was significant with the “Probability > F” being < 0.0001. The most important contributing variable to the model for conversion was temperature i.e. 83.9 percent. Temperature was still the most important variable for the selectivity response at 65.0 percent contribution level. The response surface generated for the selectivity response was flat indicating a robust method within the parameter range selected.]]> Wed 12 May 2021 16:04:36 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10471 Wed 12 May 2021 15:54:32 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10571 Wed 12 May 2021 15:51:13 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10588 Thu 13 May 2021 11:29:56 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10330 Thu 13 May 2021 08:17:59 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10528 Thu 13 May 2021 08:14:43 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10705 Thu 13 May 2021 08:07:11 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10526 Thu 13 May 2021 07:10:55 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10406 Thu 13 May 2021 07:03:18 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10589 Thu 13 May 2021 06:54:24 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10657 Thu 13 May 2021 06:10:02 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10524 Thu 13 May 2021 06:03:33 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10444 Thu 13 May 2021 05:01:05 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10570 Thu 13 May 2021 04:58:52 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10606 Thu 13 May 2021 04:26:18 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10372 Thu 13 May 2021 03:30:44 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10328 Thu 13 May 2021 02:00:02 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10750 Thu 13 May 2021 01:16:55 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10529 Thu 13 May 2021 01:07:53 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10401 Thu 13 May 2021 01:00:07 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10467 Thu 13 May 2021 00:46:01 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10621 20 μm) accounted for > 65 percent of the Chl a, whereas during closed mouth conditions they accounted for about 55 percent of the Chl a biomass. Chlorophytes became the dominant taxon in the dry summer months but were replaced by cryptophytes and dinoflagellates during the wet season. When nutrient concentrations were low during low flow conditions in the Van Stadens Estuary mixotrophic microphytoplankton became an important fraction of the water column together with phototrophic dinoflagellates and cryptophytes. In the Maitland large sized chlorophytes were the dominant taxa in late spring and summer seasons and made up more than 80 percent of the cell numbers. In the Maitland before the floods in 2002 cyanophytes were the dominant group in late spring contributing more than 75 percent in cell abundance. Data from the short-term study in the Van Stadens Estuary showed similarities and differences in the Chl a response to increased river inflow. High river inflow initially reduced Chl a biomass followed by a recovery period of a couple of days compared to a 8 – 10 week recovery period in studies monitored over seasonal and annual temporal scales. The responses may be dissimilar but help to illustrate that there are similar response patterns to environmental forcing necessary to support phytoplankton biomass at different temporal scales. This study has demonstrated that flooding events caused by strong river flow cause breaching of the mouth, a reduction in salinity and marked nutrient input. Although the causes of flooding can be similar in both estuaries the resultant effects are varied and can alter the ability of the estuary to retain water. This study was able to demonstrate that the supply of macronutrients from the catchment was strongly correlated with rainfall (R2 = 0.67) and that phytoplankton growth mainly depended on an allochthonous source of macronutrients although internal supplies could be critical at times in controlling microalgal biomass.]]> Thu 13 May 2021 00:22:20 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:10505 Thu 13 May 2021 00:16:28 SAST ]]>