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Browsing University of Pretoria: Research Output by Supervisor "Ubbink, Johan B."
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(University of Pretoria, 2001)The primal aim of this thesis was to establish whether kinetic aspects of vitamin B6 metabolism predispose to earlier observed racial differences found in plasma pyridoxal-5'-phosphate (PLP). The active forms of vitamin ...
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(University of Pretoria, 2006-03-13)The purpose of this study was to determine whether the methylation of nicotinamide to N-methylnicotinamide could discriminate between differences in methionine nutritional status, and by implication methylation capacity, ...
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(University of Pretoria, 2009-04-15)The endogenous catecholamines and their metabolites play an integral role in establishing the presence or absence of a suspected sympatho-adrenal tumor. Highly elevated metabolites excreted in the urine are indicative of ...
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