https://vital.seals.ac.za/vital/access/manager/Index ${session.getAttribute("locale")} 5 https://vital.seals.ac.za/vital/access/manager/Repository/vital:5665 Wed 21 Jul 2021 13:46:25 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:7011 Wed 15 May 2024 15:01:03 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:1416 Wed 12 Oct 2022 11:55:46 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4604 Wed 12 May 2021 23:36:54 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:14941 Wed 12 May 2021 23:31:01 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:34400 Wed 12 May 2021 23:05:03 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:14938 Wed 12 May 2021 22:44:46 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:33768 Wed 12 May 2021 22:25:15 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:14946 Wed 12 May 2021 21:03:42 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:14949 Wed 12 May 2021 20:57:31 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:693 Wed 12 May 2021 20:36:52 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:14955 Wed 12 May 2021 20:23:40 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:14939 Wed 12 May 2021 20:12:35 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5224 0.05). The length-frequency distribution analysis revealed that the three species had the same growth rate regardless of habitat type. However, females grew faster than males. An investigation of reproductive biology showed that the three species have low fecundity and they are asynchronous spawners, with a breeding peak during August and September period. Furthermore, the length-fecundity relationships for L. ''pinkhead'', and 0. argyrosoma "red" indicated that fecundity was more closely related to length in the south eastern side than in the south western side. Based on the above characteristics of L. ''pinkhead'', 0. argyrosoma "red" and C. cf virginalis, and the substrate types, it was strongly suggested that the existing sanctuary (lightly fished) in the south eastern side of the lake could immediately be enlarged to conserve the fish stocks, favourable substratum and aquatic animals that may be of tourists concern.]]> Wed 12 May 2021 20:03:44 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:33184 Wed 12 May 2021 20:01:27 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:14344 Wed 12 May 2021 19:58:00 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:14952 Wed 12 May 2021 19:55:18 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:37490 Wed 12 May 2021 19:54:20 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:1246 Wed 12 May 2021 19:45:17 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4409 Wed 12 May 2021 19:42:31 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:14944 Wed 12 May 2021 19:41:54 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4007 Wed 12 May 2021 19:29:13 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:2361 Wed 12 May 2021 19:24:39 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:14943 Wed 12 May 2021 19:00:42 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:14940 Wed 12 May 2021 18:46:45 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:2543 Wed 12 May 2021 18:46:38 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:2278 Wed 12 May 2021 18:43:59 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:14957 Wed 12 May 2021 18:42:57 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5233 Wed 12 May 2021 18:40:31 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:3085 Wed 12 May 2021 18:30:51 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4417 99% d.e. for the bomane-2,3-diol acetals. In order to increase diastereofacial selectivity, a camphor-derived diol having a bulky substituent at C-10 was prepared, viz., phenyl 2,3-dihydroxybomane-10sulfonate, and α,β-unsaturated acetals of this diol were shown to undergo Simmons-Smith cyclopropanation with complete topological control (>99% d.e.), the diastereoselectivities being conveniently determined by ¹H and ¹³C NMR spectroscopy. Computer modelling, with the software package HYPERCHEM®, was used to explore the stereochemical aspects of the Simmons-Smith cyclopropanation, and hydrolysis of one of the cyclopropyl acetals has permitted the diastereoselective bias to be confirmed. (+)-Pinane-2,3-diol was also investigated as a chiral auxiliary in the Simmons-Smith reactions of α,β-unsaturated aldehydes, and moderate diastereoselectivities (20-30% d.e.) were observed. In a series of exploratory studies, the Diels-Alder reaction of the 2,3-dihydroxybomane-10-sulfonate acetal of trans-cinnamaldehyde with cyclopentadiene afforded a single cycloadduct, while OSO₄ dihydroxylation, MCPBA oxidation and alkylation of chiral acetals produced from both bomane-2,3-diol and phenyl 2,3-dihydroxybomane-10-sulfonate were less selective.]]> Wed 12 May 2021 18:04:19 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:29770 Wed 12 May 2021 17:56:59 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:33169 Wed 12 May 2021 17:39:22 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:34426 Wed 12 May 2021 17:36:25 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4383 Wed 12 May 2021 17:30:50 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:3838 Wed 12 May 2021 17:22:54 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:15030 Wed 12 May 2021 16:50:46 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:29769 Wed 12 May 2021 16:43:24 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4429 Wed 12 May 2021 16:36:44 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:2345 Wed 12 May 2021 16:36:05 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5236 Wed 12 May 2021 16:33:21 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:28870 Wed 12 May 2021 16:07:18 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:32631 Wed 12 May 2021 16:05:19 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:14945 Wed 12 May 2021 15:58:58 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:1900 Wed 12 May 2021 15:54:17 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:42135 Wed 12 May 2021 13:48:20 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:617 Wed 07 Jul 2021 14:02:55 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6383 Tue 14 May 2024 12:37:01 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6344 Tue 14 May 2024 12:35:42 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6343 Tue 14 May 2024 12:35:18 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6341 Tue 14 May 2024 12:34:31 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6424 Tue 14 May 2024 12:12:30 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6423 Tue 14 May 2024 10:44:40 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:45106 99% d.e. for larger alkyl groups. The expected preference for endo-alkylation is supported by NMR (chemical shift, coupling constant and NOE) data and was confirmed by acidic hydrolysis of the pentylated 3-imino lactone to afford the known acid. Computer modelling, with the software package HYPERCHEM®, was used to explore the conformational properties of the alkylated products and their enolate precursors. Exploratory work on the enantiomeric beneficiation of racemic amino acids, using alkylated imino lactone derivatives, revealed preferential exo-protonation of the enolate intermediates. Asymmetric Baylis-Hillman reactions between a novel camphor-derived acrylic ester and a range of aldehydes afforded the corresponding 2-(hydroxyalkyl)acrylates in up to 59% d.e., the observed stereoselectivities being sensitive to both steric and electronic factors. Attempts to prepare imino lactone derivatives from ketopinic acid, although unsuccessful, led to the isolation of two novel W-(carbobenzyloxy)glycinates, whose structures were established by 1- and 2-D NMR spectroscopy. Attempts to prepare "BINAP" analogues from dibomyl ether's also proved unsuccessful, but the investigation led to the discovery of a third, novel dibomyl ether.]]> Tue 09 Nov 2021 15:33:35 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:3592 Thu 13 May 2021 14:02:39 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:3601 Thu 13 May 2021 13:42:43 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:2631 Thu 13 May 2021 08:45:33 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:14942 Thu 13 May 2021 08:27:40 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4198 Thu 13 May 2021 08:12:44 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:4010 Thu 13 May 2021 07:34:45 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:14345 Thu 13 May 2021 07:12:45 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:33185 Thu 13 May 2021 07:09:51 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:3005 Thu 13 May 2021 07:05:37 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:2567 Thu 13 May 2021 06:18:41 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:7016 Thu 13 May 2021 06:16:50 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:2532 Thu 13 May 2021 06:10:01 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:21103 Thu 13 May 2021 05:59:21 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:32410 Thu 13 May 2021 05:47:58 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:14947 Thu 13 May 2021 05:47:36 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:33601 Thu 13 May 2021 05:37:37 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5306 Thu 13 May 2021 05:34:12 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5242 Thu 13 May 2021 05:30:31 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:34406 Thu 13 May 2021 04:55:41 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:3042 Thu 13 May 2021 04:51:55 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:14954 Thu 13 May 2021 04:49:52 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:14948 Thu 13 May 2021 04:01:21 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:32109 Thu 13 May 2021 04:00:02 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:3089 Thu 13 May 2021 03:41:14 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:2362 Thu 13 May 2021 03:40:39 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6148 Thu 13 May 2021 03:27:16 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:2992 Thu 13 May 2021 03:16:39 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:3023 Thu 13 May 2021 03:01:06 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:32609 Thu 13 May 2021 02:57:28 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:14950 Thu 13 May 2021 02:44:20 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:34408 Thu 13 May 2021 02:10:14 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:32416 Thu 13 May 2021 02:04:10 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:5400 Thu 13 May 2021 01:54:30 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:34404 Thu 13 May 2021 01:49:45 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:2642 Thu 13 May 2021 01:42:00 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:14956 Thu 13 May 2021 00:57:55 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:29653 Thu 13 May 2021 00:51:15 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:14951 Thu 13 May 2021 00:44:43 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:32645 Thu 13 May 2021 00:36:15 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:14953 Thu 13 May 2021 00:24:47 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:32443 Thu 13 May 2021 00:10:47 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:40625 Thu 01 Feb 2024 09:09:29 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:36801 Mon 13 May 2024 12:29:36 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:72908 Mon 03 Jun 2024 13:08:20 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:72894 Mon 03 Jun 2024 08:46:14 SAST ]]> https://vital.seals.ac.za/vital/access/manager/Repository/vital:6943 Mon 03 Apr 2023 12:03:29 SAST ]]>