Yazar "Viljoen, Alvaro M." için Makale Koleksiyonu listeleme
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The antimicrobial, antimalarial and toxicity profiles of helihumulone, leaf essential oil and extracts of Helichrysum cymosum (L.) D. Don subsp cymosum
Van Vuuren, Sandy; Viljoen, Alvaro M.; van Zyl, Robyn L.; van Heerden, F. R.; Başer, K. Hüsnü Can (Elsevier Science BV, 2006)Helichrysum cymosum, an aromatic plant used in traditional medicine to treat respiratory ailments and wound infections is widely distributed throughout Southern Africa. Using bioassay-guided fractionation, an active compound ... -
The biological activity and essential oil composition of 17 Agathosma (Rutaceae) species
Viljoen, Alvaro M.; Moolla, Aneesa; van Vuuren, Sandy F.; van Zyl, Robyn L.; Başer, K. Hüsnü Can; Demirci, Betül; Trinder-Smith, Terry H. (Allured Publ Corp, 2006)The essential oil composition, antimicrobial, anti-inflammatory and cytotoxic activities of 17 indigenous Agathosma species (18 samples) were investigated in order to validate their use in traditional healing. The results ... -
Chemical composition of the wood and leaf oils from the "Clanwilliam Cedar" (Widdringtonia cedarbergensis J.A Marsh): A critically endangered species
Kamatou, G. P. P.; Viljoen, Alvaro M.; Özek, Temel; Başer, K. Hüsnü Can (Elsevier Science BV, 2010)Widdringtonia is the only genus of the 16 genera of Cupressaceae present in South Africa This genus is represented by three species in South Africa, W nodiflora, W schwarzu and W cedarbergensis (= W juniperoides) and the ... -
Composition of the essential oil of Diosma prama I. Williams
Başer, K. Hüsnü Can; Demirci, Betül; Özek, Temel; Viljoen, Alvaro M.; Victor, J. E. (Allured Publ Corp, 2006)Hydrodistilled essential oils from the herbal parts of Diosma prama were analyzed by GC and GC/MS. Thirty compounds were characterized in chemotype A, representing 97.3% of the oil with 1,8-cineole + beta-phellandrene ... -
Composition of the essential oil of Euchaetis albertiniana I.J.M. Williams
Hydrodistilled essential oil from herbal parts of Euchaetis albertiniana was analyzed by GC and GC/M S. Fifty-seven compounds were characterized representing 97.7% of the oil with ß-pinene (17.5%), ß-pinene (14%), 1,8-cineole ... -
Composition of the essential oil of Euchaetis albertiniana IJM Williams
Başer, K. Hüsnü Can; Demirci, Betül; Özek, Temel; Viljoen, Alvaro M. (Allured Publ Corp, 2006)Hydrodistilled essential oil from herbal parts of Euchaetis albertiniana was analyzed by GC and GC/MS. Fifty-seven compounds were characterized representing 97.7% of the oil with alpha-pinene (17.5%), beta-pinene (14%), ... -
Composition of the essential oils of five Coleonema species from South Africa
Başer, K. Hüsnü Can; Demirci, Betül; Özek, Temel; Viljoen, Alvaro M.; Victor, J. E. (Allured Publ Corp, 2006)Hydrodistilled essential oils from the herbal parts of Coleonema album (Thunb.) Bartl. et H.L. Wendl., C. aspalathoides Juss et Don, C. calycinum (Steud.) I., Williams, C. pulchellum I. Williams (three samples) and C. ... -
Composition of the essential oils of three Acmadenia species from South Africa
Başer, K. Hüsnü Can; Demirci, Betül; Özek, Temel; Viljoen, Alvaro M.; Victor, J. E. (Allured Publ Corp, 2006)Hydrodistilled essential oils from the leaves of Acmadenia alternifolia Cham., A. obtusata (Thunb.) Batl. et H.L. Wendle and A. sheilae I. Williams were analyzed by GC and GC/MS. Twenty-two compounds were characterized in ... -
Composition of the essential oils of two Adenandra species from South Africa
Başer, K. Hüsnü Can; Demirci, Betül; Özek, Temel; Viljoen, Alvaro M.; Victor, J. E. (Allured Publ Corp, 2006)Hydrodistilled essential oils from the herbal parts of Adenandra obtusata Sond. and A. villosa (P.J.Bergius) Licht. ex Roem. et Schult. were analyzed by GC and GC/MS. Thirty-seven compounds were characterized in the oil ... -
The composition, geographical variation and antimicrobial activity of Lippia javanica (Verbenaceae) leaf essential oils
Viljoen, Alvaro M.; Subramoney, S; van Vuuren, Sandy F.; Başer, K. Hüsnü Can; Demirci, Betül (Elsevier Sci Ireland LTD, 2005)Lippia javanica is widely distributed throughout South Africa where it is used extensively in traditional herbal preparations. An infusion of the leaves is commonly used as a decongestant for colds and coughs. A preliminary ... -
The essential oil composition and chemotaxonomical appraisal of South African Pelargoniums (Geraniaceae)
Lalli, Jacqueline Y. Y.; Viljoen, Alvaro M.; Başer, K. Hüsnü Can; Demirci, Betül; Özek, Temel (Allured Publ Corp, 2006)A plethora of information is available on the essential oil composition of commercially grown Pelargonimus namely P. capitatum, P. graveolens and P. radens and their hybrids, while only a few chemical investigations have ... -
Essential oil composition and in vitro antimicrobial and anti-inflammatory activity of South African Vitex species
Nyiligira, E.; Viljoen, Alvaro M.; Başer, K. Hüsnü Can; Ózek, Temel; Van, Vuuren, S. F. (NISC Pty Ltd, 2004)The essential oil composition of Vitex pooara, V. rehmannii, V. obovata ssp. obovata, V. obovata ssp. wilmsii and V. zeyheri was determined using gas chromatography and mass spectrometry. The in vitro antimicrobial activity ... -
The geographical variation and antimicrobial activity of African wormwood (Artemisia afra Jacq.) essential oil
Viljoen, Alvaro M.; van Vuuren, Sandy F.; Gwebu, Tebogo; Demirci, Betül; Başer, K. Hüsnü Can (Taylor & Francis Inc, 2006)The aerial parts of 16 individual Artemisia afra plants from four natural populations were hydrodistilled and the essential oil analyzed by GC/MS. The oil composition varied quantitatively and qualitatively within and ... -
Head-space volatiles of Gethyllis afra and G. ciliaris fruits ("kukumakranka")
Kamatou, G. P. P.; Viljoen, Alvaro M.; Özek, Temel; Başer, K. Hüsnü Can (Elsevier Science BV, 2008)The head-space volatiles of Gethyllis afra and G. ciliaris fruits collected in the South Western Cape Province of South Africa were analysed by solid phase micro-extraction (SPME) followed by gas chromatography coupled to ... -
Head-space volatiles of marula (Sclerocarya birrea subsp caffra)
Viljoen, Alvaro M.; Kamatou, G. P. P.; Başer, K. Hüsnü Can (Elsevier Science BV, 2008)Head-space volatiles of the fruit pulp and the whole fruits (skin volatiles) were investigated using solid phase micro-extraction (SPME) and GC-MS. The two major compounds in the fruit pulp were beta-caryophyllene (91.3%) ... -
In vitro biological activity and essential oil composition of four indigenous South African Helichrysum species
Lourens, ACU; Reddy, D; Başer, K. Hüsnü Can; Viljoen, Alvaro M.; Van, Vuuren, S. F. (Elsevier Sci Ireland LTD, 2004)Helichrysum species are used widely to treat various medical conditions. In this study, the anti-microbial, anti-oxidant (DPPH assay) and anti-inflammatory activity (5-lipoxygenase assay) of Helichrysum dasyanthum, Helichrysum ... -
The in vitro pharmacological activities and a chemical investigation of three South African Salvia species
Kamatou, G. P. P.; Viljoen, Alvaro M.; Gono-Bwalya, AB; van Zyl, Robyn L.; Van, Vuuren, S. F.; Lourens, ACU; Steenkamp, P (Elsevier Ireland LTD, 2005)Salvia species (sage) are well known in folk medicine throughout the world. In South Africa sage is used against fever and digestive disorders. Three closely related South African species (Salvia stenophylla, Salvia repens ... -
Micro distillation and essential oil chernistry - a useful tool for detecting hybridisation in Plectranthus (Lamiaceae)
Viljoen, Alvaro M.; Demirci, Betül; Başer, K. Hüsnü Can; Potgieter, C. J.; Edwards, T. J. (Elsevier Science BV, 2006)The essential oil composition is reported for Plectranthus ciliatus, Plectranthus zuluensis and their putative hybrid. The essential oil chemistry is in support of morphological data and pollination studies, which have ... -
Rare sesquiterpenes from South African Pteronia species
Viljoen, Alvaro M.; Kamatou, G. P. P.; Coovadia, Z. H.; Özek, Temel; Başer, K. Hüsnü Can (Elsevier Science BV, 2010)The genus Pteronia consists of approximately 80 species which are widely distributed in southern Africa. The essential oils isolated from the aerial parts of eleven species, analyzed by GC-MS varied both qualitatively and ... -
Seasonal and geographical variation of Heteropyxis natalensis essential oil and the effect thereof on the antimicrobial activity
Van Vuuren, Sandy; Viljoen, Alvaro M.; Özek, Temel; Demirci, Betül; Başer, K. Hüsnü Can (Elsevier Science BV, 2007)Heteropyxis natalensis (Heteropyxidaceae) is traditionally used to treat respiratory disorders, and as a decongestant and antimicrobial agent. The seasonal variation of the hydrodistilled essential oil was investigated. ...