Browsing Faculty of Natural Sciences by Author "Green, Ivan"
Now showing items 1-7 of 7
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Cardiovascular effects of the alkaloid hippadine on the isolated perfused rat heart
Mugabo, Pierre; Obikeze, Kenechukwu; Njagi, Angela; Burger, Andries; Dietrich, Danielle; Green, Ivan (Open Access Science Research Publisher, 2012)Crinum macowanii has been used extensively in traditional medicines for treatment of various illnesses such as oedema and ‘heart disease’. Previous studies of the crude bulb extracts on Langendorff perfused isolated rat ... -
Characterization and Cradiovascular Effects of (13S)-9α,13α-epoxylabda-6β(19),15(14)diol dilactone, a Diterpenoid Isolated from Leonotis leonurus
Obikezea, Kene C.; McKenzieb, Jean M.; Green, Ivan; Mugabo, Pierre (South African Chemical Institute, 2008)A new diterpenoid, (13S)-9 ,13 -epoxylabda-6 (19),15(14)diol dilactone (1), was isolated from Leonotis leonurus and the structure determined via NMR analysis. The compound causes significant changes in blood pressure of ... -
Importance and relevance of phytochemicals present in Galenia Africana
Heredia, Dario; Green, Ivan; Klaasen, Jeremy (Hindawi, 2022)Many people in developing countries rely primarily on medicinal plants as their main source of healthcare, particularly for the treatment of skin infections. Despite the widespread use of medicinal plants, there is a lack ... -
Inorganic ions in leonotis leonurus extract do not explain changes in isolated Wistar rat heart function
Burger, Andries; Mugabo, Pierre; Henkel, Ralf; Green, Ivan (Open Access Science Research Publisher, 2011)Leonotis leonurus (L. leonurus) R. Br (Lamiaceae) is used by healers in South Africa. The present study was conducted to determine if the L. leonurus effect on isolated rat heart is due to ionic changes in the perfusion fluid. -
Phytochemical screening and biological activity studies of five South African indigenous medicinal plants
Babajide, Jelili Olalekan; Mabusela, Wilfred T.; Green, Ivan; Ameer, Farouk; Weitz, Frans; Iwuoha, Emmanuel I. (Academic Journals, 2010)Different extracts and fractions of five selected indigenous South African medicinal plants, namely, Cissampelos capensis, Geranium incanum and three Gethyllis species, were subjected to phytochemical screening and testing ... -
Pt-Sn/C as a possible methanol-tolerant cathode catalyst for DMFC
Martin, Lynwill G.; Green, Ivan; Wang, X.; Pasupathi, Sivakumar; Pollet, Bruno G. (Springer Verlag, 2013)An effective method was developed for preparing highly dispersed nano-sized Pt–Sn/C electrocatalyst synthesised by a modified polyol reduction method. From XRD patterns, the Pt–Sn/C peaks shifted slightly to lower 2θ angles ... -
Some alkaloids and flavonoids from Cissampelos capensis
Babajide, Jelili Olalekan; Mabusela, Wilfred T.; Green, Ivan (Academic Journals, 2015)Following the screening of several plant species from an inventory of common medicinal plants from South Africa for medicinal properties, Cissampelos capensis was selected for further investigation due to its interesting ...