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Soil compaction is widespread throughout southern Africa, especially under intensive cultivation. The paper reports on various research projects in which the author has been involved over a period of more than 30 years. Soil compaction was identified as the cause of 'growth stunting disease' in sultana grapes and 'red death' in cotton at the Lower Orange(More)
In a series of thirty-six patients treated with clozapine we report four cases who developed upper gastrointestinal symptoms suggestive of reflux oesophagitis within 6 weeks of starting this drug. Subsequent endoscopic examination revealed moderately severe erosive oesophagitis in three of them. Of these one had received treatment for a peptic ulcer in the(More)
The aim of this naturalistic study was to compare the outcome of patients who continued on clozapine with that of those who discontinued treatment with this drug. Data from 113 patients who commenced clozapine between January 1990 and June 1995 were available for analysis. The main outcome measures were hospitalization status at each anniversary since(More)
Plasma oxalate and erythrocyte glutamic oxaloacetate transaminase activity (EGOT) (an indicator of nutritional status with respect to pyridoxine) were measured in 21 patients maintained on regular continuous ambulatory peritoneal dialysis or haemodialysis before and after a 4-month period of supplementation with pyridoxine, 100 mg day-1. Prior to(More)
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