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Rock drills used in South African mines: a comparative study of noise and vibration levels.
OBJECTIVES To compare the noise and vibration levels associated with three hand-held rock drills (pneumatic, hydraulic and electric) currently used in South African mines, and a prototypeExpand
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Pulmonary and systemic toxicity following exposure to nickel nanoparticles.
Nanoparticles are being used in ever increasing numbers in a range of industrial and medical products. Questions surrounding their potential to cause toxic effects in humans have been raised.Expand
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Asbestos lung fibre concentrations in South African chrysotile mine workers.
Mesothelioma has not been found in South African chrysotile miners and millers despite decades of producing about 100000 tons of the mineral per year. One possible explanation for the scarcity orExpand
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Mineralogy and Malignant Mesothelioma: The South African Experience
South Africa is a uniquely mineral rich country. Of the six types of asbestiform minerals found in the country, three, namely crocidolite, amosite and chrysotile were mined and milled on a largeExpand
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Ochronosis in Black South Africans Who Used Skin Lighteners
Skin-lightening preparations containing hydroquinone are used extensively by black South Africans. In some instances these preparations produce severe and irreversible cutaneous damage. Clinically,Expand
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The occurrence and distribution of haemoglobin in the entosymbiotic rhabdocoel Paravortex scrobiculariae (Graff) (Platyhelminthes: Turbellaria)
1. 1. The occurrence of haemoglobin in the entosymbiotic turbellarian Paravortex scobiculariae has been demonstrated. 2. 2. The haemoglobin occurs intracellularly in the mesenchyme, around theExpand
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Death following exposure to fine particulate nickel from a metal arc process.
A man was taken ill suddenly while spraying nickel using a thermal arc process. He was relieved of his duties and sent home. His condition deteriorated and he was admitted to hospital with aExpand
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Evaluation of the deposition, translocation and pathological response of brake dust with and without added chrysotile in comparison to crocidolite asbestos following short-term inhalation: interim
Chrysotile has been frequently used in the past in manufacturing brakes and continues to be used in brakes in many countries. This study was designed to provide an understanding of the biokineticsExpand
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Myocardial infarction associated with Chlamydia pneumoniae.
A 39-year-old black South African man with no recognised risk factors for coronary hart disease (CHD) except hypertension, died of a myocardial infarct (MI). The case was unusual because althoughExpand
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Association between Chlamydia pneumoniae and atherosclerotic lesions.
There can no longer be any doubt that viable Chlamydia pneumoniae organisms are present in atherosclerotic lesions. Indeed, the endovascular presence of C. pneumoniae in coronary artery disease (CAD)Expand
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