John C. Madgwick

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Long-term regular haemodialysis for chronic renal failure is associated with amyloidosis. In this condition excess amounts of the unexcretable plasma protein beta-microglobulin are laid down in tendons, joints and bones. Amyloidosis presents with various musculoskeletal disorders only after several years of dialysis. We reviewed 83 patients who had been(More)
Microbial manganese oxidation was demonstrated at high Mn concentrations (5 g/liter) in bacterial cultures in the presence of a microalga. The structure of the oxide produced varied depending on the bacterial strain and mode of culture. A nonaxenic, acid-tolerant microalga, a Chlamydomonas sp., was found to mediate formation of manganite (gamma-MnOOH).(More)
Xanthate floatation compounds, added to cultures of Thiobacillus ferrooxidans leaching chalcopyrite, inhibited growth in the concentration range 1–10 mM and caused a drop in formation of soluble copper and iron. Maximum (80–90%) growth inhibition was at 10 mM for isobutyl-, amyl- and ethyl xanthate while isopropyl xanthate was innocuous but caused a(More)
A Greek male with acute myeloid leukaemia (AML) developed a pyrexial illness while neutropenic and Trichosporon beigelii was isolated from his skin, blood and urine. This infection appeared to resolve with a rising neutrophil count, but recurred in the next episode of neutropenia. T. beigelii was isolated from an aspirate from an inflamed knee. Despite a(More)
Microorganisms and algae have potential as agents for removing inorganic pollutants from wastewaters. Metal ion uptake mechanisms function either by passive chemical adsorption or by metabolically driven processes. Ion selective uptake processes are being sought in algae to facilitate purification of valuable metal ions for recycling. Sessile macroalgae(More)
In the presence of unicellular microalgae, bacterial manganese oxidation was increased by up to ten times the rate produced by bacterial oxidation alone. Azide-poisoned controls demonstrated that the manganese-oxidizing bacteria were active in the algal-bacterial oxidation of manganese. Scanning electron microscopy showed that oxide formation occurred in a(More)