Now showing items 1-10 of 109
Muthi compounds from indigenous Lauraceae and Rubiaceae species.
No abstract available.
The polycyclic aromatic hydrocarbon content and mutagenicity of the residue from cane burning and vehicle emissions.
Polycyclic (or polynuclear) aromatic hydrocarbons (PAHs) are environmental pollutants produced during the incomplete combustion of organic matter. Since many of these compounds have been shown to be mutagenic and/or ...
Mössbauer study of the hyperfine magnetic field and electric field gradient at Fe sites in synthetic diamond.
Mossbauer Spectroscopy has been used to investigate the site of Fe inclusions in a suite of synthetic diamonds (de Beers MDAS). Information on the hyperfine magnetic fields and electric field gradients at Fe sites in ...
Copper(I), Palladium(II) and Platinum(II) complexes of the 2- diphenylphosphino-1,10-phenanthroline ligand.
Chapter 1 reviews the coordination behaviour of the 6-diphenylphosphino-2,2'-bipyridine, 6-anilino-2,2'-bipyridine, 2,2'-bipyridyl-6-one, 6-N-methylanilino-2,2'-bipyridine, 6-piperidyl-2,2'-bipyridine and 2-(phenylamino) ...
A study of wave induced electron precipitation at low and middle latitudes.
Wave induced electron precipitation (WIEP) can modify the ionosphere above a sub-ionospherically propagating VLF signal in such a way as to perturb the amplitude and phase of the signal: The "Trimpi Event". In this ...
Reactions and reactivity of allylic and benzylic carbamates.
The purpose of this investigation was to study the effect of the carbamate group on the reactions and reactivity of substituted 1,1-diphenylmethane and a,ro-diphenyl allylic compounds. A series of carbamates were prepared ...
An approach to the synthesis of chiral carbamates.
An attempt to obtain chiral induction across the carbamate linkage (-NCOO-), using chiral amines and the benzyl carbamate, was embarked upon. Initial studies centred around the benzyl carbamate protected form of ...
The transpassive behaviour of the anodic film on Fe-Cr alloys.
This work was undertaken to investigate the transpassive behaviour of the anodic film on two Fe-Cr alloys, namely Fe18Cr and Fe18Cr2Mo in acidic aqueous media in the pH range 0.5 to 3.8. Two electrochemical techniques were ...
Supercritical fluid extraction and analysis of indigenous medicinal plants for uterotonic activity.
Ingestion of extracts prepared from various medicinal plants to induce or augment labour is common amongst Black South African women during the late stages of pregnancy. This applies particularly to the rural areas where ...
Toxic compounds in cycads.
The present-day cycads comprise the diverse, modified, remnants of a much larger group of gymnosperms which flourished in the Mezozoic era. The systematic position that the cycads occupy in the botanical hierarchy is ...