P. Steyn

C. Rabie, P. Steyn, J. Fincham, 1984, Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association.

Synthesis, complete 1H and 13C NMR assignment and crystal structure of novel epoxide derivatives of cytochalasin B

P. Wessels, P. Steyn, J. Breytenbach, 2008, Magnetic resonance in chemistry : MRC.

The isolation and structure of a toxic metabolite from Diplodia maydis (Berk.) Sacc.

P. Wessels, P. Steyn, C. Holzapfel, 1972 .

Selective toxicity of ochratoxin A in primary cultures from different brain regions

P. Steyn, E. Creppy, G. Tramu, 1999, Archives of Toxicology.

The biosynthesis of the ochratoxins, metabolites of aspergillus ochraceus

P. Steyn, C. Holzapfel, N. P. Ferreira, 1970 .

Biosynthesis of PR toxin by Penicillium roqueforti

P. Steyn, C. P. Gorst-Allman, A. E. D. Jesus, 1981 .

Mycotoxins as Causal Factors of Diseases in Humans

P. Steyn, M. Stander, M. A. Stander, 1999 .

Quantum-chemical studies of aflatoxin B1, sterigmatocystin and versicolorin A, and a comparison with their mutagenic activity.

R. Pachter, P. Steyn, 1985, Mutation research.

Prevention by vitamin E of DNA fragmentation and apoptosis induced by fumonisin B1 in C6 glioma cells

P. Steyn, Y. Ueno, E. Creppy, 2000, Archives of Toxicology.

Structure elucidation of fusarin C, a mutagen produced by Fusarium moniliforme

W. Marasas, W. Gelderblom, P. G. Thiel, 1984 .

Conformational analysis of the cyclic peptide rhizonin a in solution and crystalline state

P. L. Wessels, P. Steyn, F. R. Heerden, 1989 .

Mycotoxins with a Special Focus on Aflatoxins, Ochratoxins and Fumonisins

W. Gelderblom, P. Steyn, G. Shephard, 2009 .

Cytochalasins E and K, toxic metabolites from Aspergillus clavatus

C. Rabie, P. Steyn, F. R. Heerden, 1982 .

7-EPI-BREFELDIN A, A COMETABOLITE OF BREFELDIN A IN CURVULARIA LUNATA

C. Rabie, P. Steyn, C. P. Gorst-Allman, 1983 .

7-epi-Brefeldin A, a co-metabolite of brefeldin A in Curvularia lunata

C. Rabie, P. Steyn, C. P. Gorst-Allman, 1982 .

Bufadienolides of plant and animal origin.

P. Steyn, F. R. Heerden, F. V. van Heerden, 1998, Natural product reports.

The characterization of two novel bufadienolides, lanceotoxins A and B from Kalanchoe lanceolata[Forssk.] Pers

P. Steyn, F. R. Heerden, L. Anderson, 1984 .

The synthesis of ochratoxins A and B metabolites of Aspergillus ochraceus Wilh.

P. Steyn, C. Holzapfel, 1967, Tetrahedron.

Cyclopiamines A and B, novel oxindole metabolites of Penicillium cyclopium westling

J. Boeyens, P. Steyn, C. Holzapfel, 1979 .

Cyclopiamines A and B, novel oxindole metabolites of Penicillium cyclopium westling

J. Boeyens, P. Steyn, C. Holzapfel, 1979 .

X-Ray crystal structure of asteltoxin, a novel mycotoxin from aspergillus stellatus curzi

C. Rabie, P. Steyn, R. Vleggaar, 1979 .

119. Oxidation of 3-methylbut-2-enolide to cis-β-formylcrotonic acid

C. Garbers, P. Steyn, W. Conradie, 1964 .

Austamide, a new toxic metabolite from

P. Steyn, 1971 .

Structure elucidation of Monatin, a high-intensity sweetener isolated from the plant Schlerochiton ilicifolius

P. Steyn, R. Vleggaar, L. Ackerman, 1993 .

A SIMPLE PREPARATION OF DEUTERIUM LABELLED O-METHYL GROUPS FOR MASS SPECTROMETRY

P. Steyn, K. J. V. D. Merwe, S. H. Eggers, 1964 .

Structure elucidation and absolute configuration of phomopsin A, a hexapeptide mycotoxin produced by Phomopsis leptostromiformis.

W. Marasas, P. Wessels, P. Steyn, 1989 .

12 – The Biosynthesis of Some Miscellaneous Mycotoxins

P. Steyn, R. Vleggaar, 1980 .

The in vitro toxicity of analogs of ochratoxin A in monkey kidney epithelial cells.

J. Seegers, P. Steyn, R. Vleggaar, 1975, Toxicology and applied pharmacology.

Tremorgenic mycotoxins from Penicillium crustosum: isolation of penitrems A–F and the structure elucidation and absolute configuration of penitrem A

W. Hull, P. Wessels, P. Steyn, 1983 .

Structure and biosynthesis of the penitrems A–F, six novel tremorgenic mycotoxins from Penicillium crustosum

W. Hull, P. Wessels, P. Steyn, 1981 .

N.m.r. assignments, conformation, and absolute configuration of ditryptophenaline and model dioxopiperazines

P. Steyn, C. M. Maes, M. Potgieter, 1986 .

The structures of five diketopiperazines from Aspergillus ustus

P. Steyn, 1973 .

564. Bromination of but-2-enolides with N-bromosuccinimide

C. Garbers, P. Steyn, W. Conradie, 1965 .

Constitution and absolute configuration of austdiol, the main toxic metabolite from Aspergillus ustus.

P. Steyn, R. Vleggaar, D. Nagel, 1974, Journal of the Chemical Society. Perkin transactions 1.

TREMORGENIC MYCOTOXINS FROM PENICILLIUM CRUSTOSUM: ISOLATION OF PENITREMS A-F AND THE STRUCTURE ELUCIDATION AND ABSOLUTE CONFIGURATION OF PENITREM A

W. Hull, P. Wessels, P. Steyn, 1983 .

BIOLOGICALLY ACTIVE SUBSTANCES FROM ZANTHOXYLUM CAPENSE (THUNB.) HARV.

P. Steyn, L. Ackerman, H. Vosloo, 1998 .

Bufadienolide glycosides of the Crassulaceae. Structure and stereochemistry of orbicusides A—C, novel toxic metabolites of Cotyledon orbiculata

P. Steyn, R. Vleggaar, F. R. Heerden, 1986 .

Some new mycotoxins

P. Steyn, 1977 .

The chemistry and 13C NMR assignments of oxaline, a novel alkaloid from penicillium oxalicum

K. Pachler, P. Wessels, P. Steyn, 1976 .

Mycotoxins and phycotoxins : a collection of invited papers

P. Steyn, R. Vleggaar, Phycotoxins, 1986 .

Ochratoxin A, a Toxic Metabolite produced by Aspergillus ochraceus Wilh.

L. Fourie, P. Steyn, D. B. Scott, 1965, Nature.

Pigments from fusarium moniliforme sheldon : Structure and 13C nuclear magnetic resonance assignments of an azaanthraquinone and three naphthoquinones

W. Marasas, P. Wessels, P. Steyn, 1979 .

Biological degradation of aflatoxin B1 by Rhodococcus erythropolis cultures.

W. V. van Zyl, P. Steyn, J. Alberts, 2006, International journal of food microbiology.

Degradation of aflatoxin B1 by cell-free extracts of Rhodococcus erythropolis and Mycobacterium fluoranthenivorans sp. nov. DSM44556T

W. H. Zyl, O. Teniola, W. Holzapfel, 2005 .

Degradation of aflatoxin B(1) by cell-free extracts of Rhodococcus erythropolis and Mycobacterium fluoranthenivorans sp. nov. DSM44556(T).

W. V. van Zyl, O. Teniola, P. Steyn, 2005, International journal of food microbiology.

The structure of dihydrodeoxy-8-epi-austdiol and the absolute configuration of the azaphilones.

P. Steyn, R. Vleggaar, 1976, Journal of the Chemical Society. Perkin transactions 1.

Tumor inhibitors. XXXV. Myrsine saponin, the active principle of Myrsine africana L.

P. Steyn, S. M. Kupchan, S. Meitner, 1969, Journal of medicinal chemistry.

The toxicity and chemical assay of sterigmatocystin, a carcinogenic mycotoxin, and its isolation from two new fungal sources.

I. Purchase, P. Steyn, C. Holzapfel, 1966, South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde.

Detection and Estimation of Ochratoxin A

P. Steyn, K. J. V. D. Merwe, 1966, Nature.

Isolation and structure of aflatoxins M1 and M2.

I F Purchase, I. Purchase, P. Steyn, 1966, Tetrahedron letters.

Influence of ochratoxin B on the ochratoxin A inhibition of phenylalanyl-tRNA formation in vitro and protein synthesis in hepatoma tissue culture cells.

P. Steyn, E. Creppy, G. Dirheimer, 1989, Toxicology letters.

Comparative study of the effect of ochratoxin A analogues on yeast aminoacyl-tRNA synthetases and on the growth and protein synthesis of hepatoma cells.

D. Kern, P. Steyn, R. Vleggaar, 1983, Toxicology letters.

Tumor inhibitors. LXII. The structures of acerotin and acerocin, novel triterpene ester aglycones from the tumor inhibitory saponins of Acer negundo.

P. Steyn, S. M. Kupchan, R. M. Smith, 1971, The Journal of organic chemistry.

Structure elucidation of a novel trichothecene glycoside using 1H and 13C nuclear magnetic resonance spectroscopy

C. Rabie, P. Steyn, R. Vleggaar, 1985 .

Screening methods for the detection of thirteen common mycotoxins.

P. Steyn, C. P. Gorst-Allman, Pieter S. Steyn, 1979, Journal of chromatography.

Carbon—carbon coupling constants derived from biosynthetic studies

P. Steyn, R. Vleggaar, R. M. Horak, 1985 .

Biosynthesis of aurovertin B. The rôle of methionine in the formation of the ethyl side-chain

P. Wessels, P. Steyn, R. Vleggaar, 1979 .

Biosynthesis of diplosporin by Diplodia macrospora. Ring formation involving methionine-derived carbon atoms

P. Steyn, R. Vleggaar, C. P. Gorst-Allman, 1979 .

4 – The Biosynthesis of Aflatoxin and Its Congeners

P. Wessels, P. Steyn, R. Vleggaar, 1980 .

Trichothecene mycotoxins from Fusarium sulphureum

C. Rabie, P. Steyn, R. Vleggaar, 1978 .

Characterization of magnesium and calcium tenuazonate from Phoma sorghina

C. Rabie, P. Steyn, 1976 .

Physicochemical data for some selected mycotoxins

P. Steyn, H. V. van Egmond, A. Pohland, 1982 .

Crystal structures and conformational analysis of ochratoxin A and B: probing the chemical structure causing toxicity

P. Steyn, P. H. V. Rooyen, J. Dillen, 1989 .

Biosynthesis of ?-cyclopiazonic acid: stereochemical aspects of D-ring formation

P. Steyn, C. P. Gorst-Allman, A. Chalmers, 1982 .

Structure and carbon-13 nuclear magnetic resonance assignments of versiconal acetate, versiconol acetate, and versiconol, metabolites from cultures of Aspergillus parasiticus treated with dichlorvos

R. J. Cole, P. Wessels, P. Steyn, 1979 .

Structure elucidation of the janthitrems, novel tremorgenic mycotoxins from Penicillium janthinellum

P. Steyn, R. Vleggaar, A. E. D. Jesus, 1984 .

Mycotoxins, general view, chemistry and structure.

P. Steyn, P S Steyn, 1995, Toxicology letters.

Tremorgenic mycotoxins.

P. Steyn, R. Vleggaar, 1985, Fortschritte der Chemie organischer Naturstoffe = Progress in the chemistry of organic natural products. Progres dans la chimie des substances organiques naturelles.

Regional selectivity to ochratoxin A, distribution and cytotoxicity in rat brain

P. Steyn, E. Creppy, G. Tramu, 1998, Archives of Toxicology.

The biosynthesis of polyketide-derived mycotoxins

P. Steyn, 1992, Journal of environmental pathology, toxicology and oncology : official organ of the International Society for Environmental Toxicology and Cancer.

X-Ray structure of oxaline: a novel alkaloid from Penicillium oxalicum

K. Pachler, P. Wessels, P. Steyn, 1974 .

Biosynthesis of cyclopiazonic acids in Penicillium cyclopium: The isolation of dimethylallylpyrophosphate: Cyclo-acetoacetyltryptophanyl dimethylallyltransferase

P. Steyn, R. McGrath, N. P. Ferreira, 1976 .

Biosynthesis of PR toxin by , Part 2 evidence for an hydride shift from 2H N.M.R. spectroscopy

P. Steyn, C. P. Gorst-Allman, 1982 .

Toxicokinetics of ochratoxin A in vervet monkeys (Cercopithecus aethiops)

P. Steyn, G. Shephard, E. Creppy, 2001, Archives of Toxicology.

A kinetic study into the hydrolysis of the ochratoxins and analogues by carboxypeptidase A.

F. H. van der Westhuizen, P. Steyn, M. Stander, 2001, Chemical research in toxicology.

In vitro inhibition of yeast valyl-tRNA synthetase by the valine homologue of ochratoxin A.

D. Kern, P. Steyn, R. Vleggaar, 1981, Biochimica et biophysica acta.

Structure elucidation of sesbanimide using high-field n.m.r. spectroscopy

P. Steyn, R. Vleggaar, C. P. Gorst-Allman, 1984 .

Tautomerism in tetramic acids: 13C nmr determination of the structures and ratios of the tautomers in 3-acetyl-5-isopropylpyrrolidine-2,4-dione

P. Wessels, P. Steyn, 1978 .

Moniliformin, a mycotoxin from Fusarium fusarioides.

C. Rabie, P. Steyn, R. Vleggaar, 1978, Journal of agricultural and food chemistry.

Toxicity of a moniliformin-producing strain of Fusarium moniliforme var. subglutinans isolated from maize.

M. Steyn, W. Marasas, P. Steyn, 1977, Food and cosmetics toxicology.

The isolation and identification of some toxic constituents ofAspergillus wentii wehmer

C. Rabie, P. Steyn, F. R. Heerden, 1986, Mycotoxin Research.

Bufadienolides of Plant and Animal Origin

P. Steyn, F. R. Heerden, 2010 .

Alkaloids from Aspergillus caespitosus

C. Rabie, P. Steyn, R. Vleggaar, 1981 .

Mechanistic studies on the biosynthesis of the aurovertins using 18O-labelled precursors

P. Steyn, R. Vleggaar, 1985 .

Application of 18O induced isotope effects in 13C n.m.r. spectroscopy to the biosynthesis of asteltoxin

P. Steyn, R. Vleggaar, A. E. D. Jesus, 1985 .

Biosynthesis of asteltoxin by cultures of Emericella variecolor. The role of propionate in the biosynthesis and evidence for a 1,2-bond migration in the formation of the bistetrahydrofuran moiety

P. Steyn, R. Vleggaar, 1984 .

Biosynthesis of the aurovertins B and D. The role of methionine and propionate in the simultaneous operation of two independent biosynthetic pathways

P. Wessels, P. Steyn, R. Vleggaar, 1981 .

Production of citreoviridin by Penicillium pulvillorum

P. Steyn, D. B. Scott, D. Nagel, 1972 .

Structural investigations of 3-acylpyrrolidine-2,4-diones by nuclear magnetic resonance spectroscopy and X-ray crystallography

P. Wessels, P. Steyn, M. J. Nolte, 1980 .

The isolation and structure of 4-hydroxyochratoxin A and 7-carboxy-3,4-dihydro-8-hydroxy-3-methylisocoumarin from

P. Steyn, D. Thompson, R. Hutchison, 1971 .

Aspartame prevents the karyomegaly induced by ochratoxin A in rat kidney

P. Steyn, E. Creppy, I. Baudrimont, 2001, Archives of Toxicology.

Viridicatumtoxin, a new mycotoxin from Penicillium viridicatum Westling.

P. Steyn, S. V. Van Rensburg, R. Hutchison, 1973, Toxicology and applied pharmacology.

High-performance liquid chromatography and thin-layer chromatography of penitrems A–F, tremorgenic mycotoxins from Penicillium crustosum

P. Steyn, C. M. Maes, F. R. Heerden, 1982 .

The separation and detection of several mycotoxins by thin-layer chromatography.

P. Steyn, 1969, Journal of chromatography.

Incidence, geographic distribution, and toxigenicity of Fusarium species in South African corn.

T. Hastie, W. Marasas, P. Steyn, 1979 .

The isolation and structure of a new diterpene lactone from Trichothecium roseum link

P. Steyn, C. Holzapfel, 1968 .

X-Ray structure of viridicatumtoxin: a new class of mycotoxin from Penicillium viridicatum Westling

P. Steyn, R. Vleggaar, U. Sankawa, 1976 .

Biosynthesis of α-cyclopiazonic acid. Steric course of proton removal during the cyclisation of β-cyclopiazonic acid in Penicillium griseofulvum

M. J. Varley, P. Steyn, R. Vleggaar, 1981 .

Metabolites of Aspergillus ustus. III: Structure elucidation of austalides G-L

C. Rabie, P. Steyn, R. Vleggaar, 1985 .

Metabolites of Aspergillus ustus. Part 3. Structure elucidation of austalides G–L

C. Rabie, P. Steyn, R. Vleggaar, 1985 .

Tremorgenic mycotoxins from Penicillium crustosum. Biosynthesis of penitrem A

W. Hull, P. Wessels, P. Steyn, 1983 .

Stable isotope labelling studies on the biosynthesis of asticolorin C by Aspergillus multicolor. Evidence for a symmetrical intermediate

P. Steyn, T. J. Simpson, R. Vleggaar, 1984 .

Application oftheFluorescent-Anti body Technique forthe Detection ofSphaerotilus natansinActivated Sludge

P. Steyn, Alan R. HOWGRAVE-GRAHAMt, 1988 .

Biosynthesis of viridicatumtoxin, a mycotoxin from Penicilium expansum

W. Hull, P. Steyn, R. Vleggaar, 1982 .

The biosynthesis of roquefortine. An investigation of acetate and mevalonate incorporation using high field n.m.r. spectroscopy

P. Steyn, R. Vleggaar, C. P. Gorst-Allman, 1982 .

The role of change management in improving policy effectiveness in the SANDF

P. Steyn, Jan-Hendrik Meyer, J. Pietersen, 2020 .

Structure elucidation of phomopsin A, a novel cyclic hexapeptide mycotoxin produced by Phomopsis leptostromiformis

W. Marasas, P. Wessels, P. Steyn, 1983 .

Carbon-13 nuclear magnetic resonance assignments and biosynthesis of the mycotoxin ochratoxin A

P. Wessels, P. Steyn, R. Vleggaar, 1980 .

Metabolites of Aspergillus ustus. Part 1. Application of the heteronuclear selective population inversion (SPI) n.m.r. technique to the structure elucidation of the austalides A–F, novel ortho ester meroterpenoids

C. Rabie, P. Steyn, R. Vleggaar, 1985 .

Metabolites of Aspergillus ustus. Part 2. Stereoelectronic control in the acid-catalysed hydrolysis of the ortho ester moiety in austalides A–F

P. Steyn, R. Vleggaar, R. M. Horak, 1985 .

Biosynthesis of austalide D, a meroterpenoid mycotoxin from Aspergillus ustus

P. Steyn, R. Vleggaar, A. E. D. Jesus, 1983 .

Structures of the austalides A–E, five noval toxic metabolites from Aspergillus ustus

C. Rabie, P. Steyn, R. Vleggaar, 1981 .

Impact of scientific developments on the Chemical Weapons Convention (IUPAC Technical Report)

M. Balali-Mood, P. Steyn, L. Sydnes, 2008 .

Tremorgenic neurotoxins from perennial ryegrass causing ryegrass staggers disorder of livestock : structure and elucidation of lolitrem B

P. Steyn, R. Vleggaar, A. D. Hawkes, 1984 .