A. Viljoen

Publications366
h-index54
Citations10,559
Highly Influential Citations430
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Plant-based antimicrobial studies--methods and approaches to study the interaction between natural products.
TLDR
It is recommended for future development in the field of phytosynergy that consideration should be given to the selection criteria for the two inhibitors of synergistic interactions, and a more conservative approach should be adopted when classifying synergy. Expand
Eugenol—From the Remote Maluku Islands to the International Market Place: A Review of a Remarkable and Versatile Molecule
TLDR
Eugenol is considered safe as a food additive but due to the wide range of different applications, extensive use and availability of clove oil, it is pertinent to discuss the general toxicity with special reference to contact dermatitis. Expand
The in vitro pharmacological activities and a chemical investigation of three South African Salvia species.
TLDR
The results of the in vitro pharmacological activities provide a scientific basis to validate the use of these Salvia species in traditional medicine in South Africa. Expand
South African Salvia species: a review of biological activities and phytochemistry.
TLDR
The review aims to collate recent research results on the phytochemistry and pharmacological properties of indigenous species of Salvia in South Africa as a first attempt to provide scientific support for past and present local traditional uses. Expand
African seed oils of commercial importance — Cosmetic applications
Seed oils have been used for centuries by rural communities as food, medicine, for cosmetic applications and as fuel. Recently there has been a renewed interest in these non-timber forest products… Expand
The composition, geographical variation and antimicrobial activity of Lippia javanica (Verbenaceae) leaf essential oils.
TLDR
Time kill studies were performed on three microbial respiratory isolates to document the scientific rationale of using Lippia to treat respiratory complaints in traditional herbal medicine. Expand
Chemistry of Aloe Species
The genus Aloe (Asphodelaceae), with nearly 420 species confined mainly to Africa, has over the years proved to be one of the most important sources of biologically active compounds. Over 130… Expand
The in vitro biological activity of selected South African Commiphora species.
TLDR
The rate at which Commiphora marlothii (stem) kills Staphylococcus aureus over a 24h period was determined and a concentration-dependent antibacterial activity was observed beginning after ca. Expand
Antimicrobial activity of southern African medicinal plants with dermatological relevance: From an ethnopharmacological screening approach, to combination studies and the isolation of a bioactive…
TLDR
Positive antimicrobial effects noted for plants such as Elephantorrhiza elephantina and Diospyros mespiliformis used for acne vulgaris and ringworm infections, respectively, give some validation to their reported traditiona l uses. Expand
The in vitro antibiofilm activity of selected culinary herbs and medicinal plants against Listeria monocytogenes
Aims:  The antibiofilm activity of extracts obtained from selected herbs, spices, beverages and commercially important medicinal plants was investigated on Listeria monocytogenes.
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