https://commons.ru.ac.za/vital/access/manager/Index en-us 5 https://commons.ru.ac.za/vital/access/manager/Repository/vital:71648 Wed 08 May 2024 18:36:44 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:71649 Wed 08 May 2024 18:08:39 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:65849 Tue 18 Jul 2023 16:30:19 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:71629 Tue 14 May 2024 19:32:24 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:71650 Tue 07 May 2024 14:59:27 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:71651 Tue 07 May 2024 14:59:26 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:71630 Thu 22 Feb 2024 04:14:06 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:71646 Thu 09 May 2024 21:10:14 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:71647 Thu 09 May 2024 21:09:49 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:71617 Thu 07 Mar 2024 09:37:07 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:71618 Thu 07 Mar 2024 08:48:25 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:71615 Sun 25 Feb 2024 13:41:54 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:71628 Sat 17 Feb 2024 12:46:41 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:71616 Sat 17 Feb 2024 09:31:31 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:71965 Sat 06 Apr 2024 15:13:22 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:71964 Sat 06 Apr 2024 15:13:06 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:71963 Sat 06 Apr 2024 14:59:11 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:71962 0.5 mg/ml). The QDs also retained most of their fluorescence and properties and could easily be tracked in cells and visualized around the nucleus, indicating the successful internalization of the QDs in the cytosol. These results shows that encapsulation of CdTe multi-core-shell QDs in liposomes produce better bio-compatibility compared to multi-core-shell QDs and better than CNP coating. These particles therefore show good promise in cell-labelling, drug delivery studies. Their core-shell nanoparticles have also shown good behavior in enhancing the memory of a device which is based on some recent collaborated works.]]> Sat 06 Apr 2024 14:52:11 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:71958 Sat 06 Apr 2024 13:48:43 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:71957 Sat 06 Apr 2024 13:33:28 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:71956 4 and Dst_ -50 nT was used as a criterion for geomagnetic disturbed conditions, while the four geomagnetically quiet days were selected each month based on Kp < 3. Observations of TIDs are made using Global Navigational Satellite Systems (GNSS) total electron content derived data. During quiet conditions, seven and two transhemispheric TIDs were identified over the African-European and American sectors, respectively. The observed TIDs originated from the wintertime hemisphere and propagated into the summertime hemisphere. The horizontal velocity, periods, and horizontal wavelengths of TIDs are in range of cH = 120-274 m/s, 48-80 min and _H = 379-1104 km, respectively. These quiet-time equatorward TIDs have been associated with tertiary gravity waves (GWs) from the dissipation of secondary GWs which are in turn generated from the dissipation of mountain waves (MWs) as a result of excited orographic forcing. The poleward TIDs during geomagnetically quiet conditions over the African and American sectors occur mainly during local daytime. Poleward TIDs were observed mostly in the African-European sector than the American sector. Their horizontal propagation velocities and periods range between 129-280 m/s and 39-70 min over African-European and American sectors. Although the mechanisms responsible for launching quiet-time poleward TIDs have not been established in this study, lower atmospheric processes such as convection systems, sudden stratospheric warming and cold weather fronts may have a role in their generation. During geomagnetic storms in the African sector, almost all poleward TIDs (with the exception of two cases) during the main phase were large-scale with horizontal velocities and periods ranging from 250-503 m/s and 30 min to 2 hours. During recovery phase, poleward TIDs fall under the category of medium scale. In the American sector, the majority of poleward TIDs occurred during the storm's main phase, as opposed to the African-European sector, which experienced a significant number of poleward TIDs during the recovery phase. The periods and horizontal velocities of TIDs range from 45 min-1.5 h and 180-296 m/s during main phase. During the recovery phase, the horizontal velocity and period range from 177-271 m/s and 40-1.5 h, respectively. Overall, it has been shown that statistically, changes in equatorial electrodynamics related to enhanced eastward electric _eld and hence increased equatorial electrojet (vertical E_B drift) correlates highly with the reported poleward TIDs.]]> Sat 06 Apr 2024 13:06:52 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:71955 Sat 06 Apr 2024 12:42:05 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:71612 Mon 19 Feb 2024 21:16:58 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:71614 Mon 19 Feb 2024 21:10:06 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:71619 Mon 13 May 2024 15:55:33 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:71644 Mon 13 May 2024 15:48:43 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:71645 Mon 13 May 2024 15:48:39 SAST ]]>