Browsing Theses and Dissertations (Chemical Pathology) by Supervisor "Laurens, Johannes B."

Now showing items 1-4 of 4

Applications of extractive-derivatization sample preparation in a clinical toxicology laboratory setting

Marais, A.A.S. (Adriaan Albertyn Scheepers) (University of Pretoria, 2009-12-09)

The metabolism of absorbed xenobiotic compounds in humans results in a mixture of target compounds applicable for analysis, trapped in complex biological matrices. Gas chromatography-mass spectrometry (GC-MS) is a powerful ...
Diagnosis of helicobacter pylori infection with the 13C-urea breath test : analysis by means of gas chromatography with mass selective detection

Jordaan, Maraliese (University of Pretoria, 2007)

Please read the abstract in the section front of this document
Quantitative analysis of catecholamines and their metabolites in human urine by gas chromatography - mass spectrometry as a screening method for sympatho-adrenal tumors

Marais, Brian (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 ...
Tryptophan and the kynurenine pathway in chronic renal failure patients on dialysis

Bipath, Priyesh (University of Pretoria, 2008-04-29)

Tryptophan is metabolised along the kynurenine pathway under the influence of tryptophan 2,3 dioxygenase and indoleamine 2,3 dioxygenase. Quinolinic acid and kynurenine, two neuroactive metabolites of the kynurenine pathway ...

Now showing items 1-4 of 4

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