Laurens, Johannes B.; Carstens, Pieter Albert, 1960-(Health and Medical Publishing Group, 2020-10)
The legalisation of cannabis by the High Court of South Africa, which was confirmed by the Constitutional Court, imposes challenges to
occupational medical practitioners acting as medical review officers in compliance ...
Laurens, Johannes B.; Carstens, Pieter Albert, 1960-(Health and Medical Publishing Group, 2020-12)
BACKGROUND. Prohibited substance regulation and compliance-testing programmes are required to minimise risks to health and safety in
the workplace due to inappropriate use of legal (alcohol, cannabis) and illegal substances. ...
Marais, Adriaan Albertyn Scheepers; Laurens, Johannes B.(Elsevier, 2008)
Amphetamine and related derivatives are widely abused central- and psychostimulants. Detection of certain derivatives, such as methcathinone, by commonly available immunoassay screening techniques is insufficient. Multi-analyte ...
Sharma, Kamlesh; Laurens, Johannes B.; Pilcher, Lynne A.(Routledge, 2009)
On exposure to the potential carcinogen 1,3-butadiene, the major
urinary metabolite in humans is N-acetyl-S-(3,4-dihydroxybutyl)cysteine. A
novel, stereoselective synthesis of this cysteine–butadiene metabolite has ...
