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 ...
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 ...
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 ...
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 ...
The role of sodium silicate in newsprint deinking.
Mondi Ltd. operates a deinking plant at its Merebank mill. The plant recycles 85 000 tons per annum of flat news and magazine to produce a furnish for its newsprint papermachines. A review of the relevant pulping and ...
Extractives from the Amaryllidaceae : Brunsvigia radulosa and Cyrtanthus breviflorus.
No abstract available.
An assessment of the Pietermaritzburg Waste Minimisation Club and the waste minimisation opportunities on a coil coating plant.
This study involved an assessment of the Pietermaritzburg Waste Minimisation Club (PWMC) during 2001, and a waste minimisation audit conducted at two coil coating lines. Waste minimisation is the reduction or elimination ...
Determination of the inorganic pollutants in South African sewage sludges.
A total of 78 sludge samples originating from 69 sewage works of South Africa were used in this investigation. Seven of the sludge samples were liquid and the rest were solid. Moisture content, pH and mineral ion determination ...