Now showing items 1-10 of 73
An investigation of new heterogeneous hydrotalcite-like catalysts for the cis-dihydroxylation of olefins.
The use of supported catalysts to essentially combine the positive traits offered by both homogeneous and heterogeneous catalysis has become a competitive field of research. In particular, hydrotalcite-like catalysts (HTIc) ...
A phytochemical investigation of two South African plants with the screening of extractives for biological activity.
Two South African medicinal plants, Strophanthus speciosus and Eucomis montana, were investigated phytochemically. From Strophanthus speciosus a cardenolide, neritaloside, was isolated, whilst Eucomis montana yielded ...
Studies towards the synthesis of frog alkaloid 251F.
No abstract available
A comparative study of molybdenum and iron phosphate-based catalysts in n-hexane activation.
A comparative study of the activation of n-hexane over the 12-molybdophopshoric acid (H3PMo12O40 or HPA), its Fe3+ doped salt (Fe0.69H0.93PMo12O40 or Fe doped HPA) and the iron phosphate catalyst (P/Fe = 1.22) was carried ...
An investigation of the photostabilisation of sunscreen absorbers by plant polyphenols.
Commercial sunscreen products are used to protect the skin against hannful ultraviolet (UV) radiation that can induce skin cancer at high dosage. These products contain UV filters that can reflect, scatter or absorb UV ...
DNA cleavage, photoinduced by benzophenone-based sunscreens.
The topical application of sunscreens is widely practised to protect healthy and photosensitive skins from the sun. The benzophenone-derived sunscreens, e.g. 2-hydroxy-4-methoxy benzophenone-5-sulphonic acid (or benzophenone-4) ...
Metal powder production by pyrolysis of metal oxalates and carbonyl clusters.
Chapter One serves as an introduction to, and background information, on the thermal decomposition of metal oxalates and homonucleus carbonyl clusters. Emphasis is placed on the compounds under investigation, namely the ...
A synthetic and computational investigation of trishomocubane-amino acid derivatives.
The class of polycyclic hydrocarbons including adamantane, pentacyclo [5.4.0.02 ,6. 03,I0.05,9]undecane (PCU) and trishomocubane have proven to be an exciting investigation for synthetic chemists. Many derivatives have ...
Studies towards the synthesis of perhydropyrrolo[2,1-j]quinoline and perhydropyrido[2,1-j]quinoline ascidian alkaloids.
Cylindricines A-K [1-11], lepadifonnine  and fasicularin  are tricyclic ascidian alkaloids exhibiting the perhydropyrrolo[2,1 :j]quinoline and perhydropyrido[2,1-j]quinoline ring systems. The structural features ...
The selective oxidation of n-butane to maleic anhydride.
Industrial catalysts used in commercial processes for the production of maleic anhydride are mainly Vanadium Phosphorous Oxide (VPO) catalysts. The VPO catalyst used is Vanadyl Pyrophosphate (VO)2P207 made from its precursor ...