Now showing items 1-10 of 74
Gold coordination during homogeneous alkyne and allene cyclisation catalysis : coordination to substrates, to ancillary ligands and in intermediates
(AOSIS Publishing, 2011-03-16)
The ever-increasing role of homogeneous gold catalysis in organic synthesis and the consequent need to be able to rationally control the rate and outcome of such reactions has emphasised the importance of each successive ...
Mammalian exocrine secretions XVIII : chemical characterization of interdigital secretion of red hartebeest, Alcelaphus buselaphus caama
(Springer Verlag, 2003-10)
Gas chromatography, coupled gas chromatography-mass spectrometry (electron impact mode and chemical ionization with methane as reactant gas), gas chromatography-infrared spectroscopy, and derivatization techniques were ...
Chemical characterization of territorial marking fluid of male Bengal tiger, Panthera tigris
(Springer Verlag, 2008-05)
The territorial marking fluid of the male Bengal tiger, Panthera tigris, consists of a mixture of urine and a small quantity of lipid material that may act as a controlled-release carrier for the volatile constituents of ...
AuII : skaars of afgeskeep? 'n Kritiese literatuuroorsig
AFRIKAANSE OPSOMMING: Verbindings van AuII is reeds langer as 60 jaar bekend. ’n Literatuurstudie toon dat slegs ’n beperkte aantal struktuur- en bindingstipes tot dusver in suiwer vorm geïsoleer en gekarakteriseer kon ...
Pheromones of the Scarabaeinae, II : composition of the pheromone disseminating carrier material secreted by male dung beetles of the genus Kheper
(Dieterich'sche Verlagsbuchhandlung, Wiesbaden (now Mainz), 1990-01)
Gel electrophoresis of the white flocculent pheromone disseminating secretions produced by males of the three dung beetle species, Kheper lumarcki, K. nigroacneus and K. subaeneus, revealed that three different proteins ...
Temporal changes in the neonatal recognition cue of Dohne Merino Lambs (Ovis aries)
(Oxford University Press (OUP), 2014-02)
The strong bond that is formed between ewe and lamb after parturition is important for lamb survival. Evidence exists that the ewe mainly employs olfactory recognition cues to distinguish her lamb from other lambs in the ...
The cytotoxicity of the ajoene analogue BisPMB in WHCO1 oesophageal cancer cells is mediated by CHOP/GADD153
ENGLISH ABSTRACT: Garlic is a food and medicinal plant that has been used in folk medicine since ancient times for its beneficial health effects, which include protection against cancer. Crushed garlic cloves contain an ...
Synthesis of novel piperazine-linked anthranilic acids as potential small molecule kinase inhibitors
(South African Chemical Institute, 2014-03)
Substituted anthranilic acid and piperazines were used as building blocks to prepare two libraries of compounds, with the aim being that they would exhibit biochemical activity as small molecule kinase inhibitors. The ...
Gold acyl complex formation and decarbonylation during indene synthesis from catalytically active vinylidene complexes
The development of targeted gold acyl complexes, which are generated from dialkynes via vinylidene intermediates, and can decarbonylate to form indenes by proto-aurolysis is highlighted.
Solid state NMR characterization and adsorption properties of lignocellulose-clinoptilolite composites prepared with siloxanes coupling agents
(South African Chemical Institute, 2015-02-15)
ENGLISH ABSTRACT: This study reports the preparation of lignocellulose-clinoptilolite composites by means of N-terminated siloxanes as coupling agents, after acid hydrolysis. Reactions were carried out in the presence of ...