Browsing by Author "Hussein, Ahmed A."
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Acylphloroglucinol derivatives from the South African helichrysum niveum and their biological activities
Popoola, Olugbenga K.; Marnewick, Jeanine L.; Rautenbach, Fanie; Iwuoha, Emmanuel I.; Hussein, Ahmed A. (MDPI, 2015)Abstract: Phytochemical investigation of aerial parts of Helichrysum niveum (H. niveum) using different chromatographic methods including semi-preparative HPLC afforded three new (1–3) and six known (4–10) acylphloroglucinols ... -
Biosynthesis, Characterization, and Biological Activities of Procyanidin Capped Silver Nanoparticles
Badeggi, Umar M.; Badmus, Jelili A.; Botha, Subelia S.; Ismail, Enas; Marnewick, Jeanine L.; Africa, Charlene Wilma Joyce; Hussein, Ahmed A. (Multidisciplinary Digital Publishing Institute, 2020-09-19)In this study, procyanidin dimers and Leucosidea sericea total extract (LSTE) were employed in the synthesis of silver nanoparticles (AgNPs) and characterized by ultraviolet-visible (UV-Visible) spectroscopy, high-resolution ... -
Characterization of four new compounds from protea cynaroides leaves and their tyrosinase inhibitory potential
Yalo, Masande; Makhaba, Masixole; Hussein, Ahmed A. (MDPI, 2022)Protea cynaroides (king protea) is a flowering plant that belongs to the Proteaceae family. This multi-stemmed shrub is the national flower of South Africa and has important economic and medicinal values. Traditionally, ... -
Cytotoxic, cytostatic and HIV-1 PR inhibitory activities of the soft coral litophyton arboreum
Ellithey, Mona S.; Lall, Namrita; Hussein, Ahmed A.; Meyer, Debra (MDPI, 2013)Bioassay-guided fractionation using different chromatographic and spectroscopic techniques in the analysis of the Red Sea soft coral Litophyton arboreum led to the isolation of nine compounds; sarcophytol M (1), alismol ... -
Inhibition of bacteria associated with wound infection by biocompatible green synthesized gold nanoparticles from South African plant extracts
Elbagory, Abdulrahman M.; Meyer, Mervin; Cupido, Christopher N.; Hussein, Ahmed A. (MDPI, 2017)Unlike conventional physical and chemical methods, the biogenic synthesis of gold nanoparticles (GNPs) is considered a green and non-toxic approach to produce biocompatible GNPs that can be utilized in various biomedical ... -
Inhibition of HIV-1 enzymes, antioxidant and anti-inflammatory activities of Plectranthus barbatus
Kapewangolo, Petrina; Hussein, Ahmed A.; Meyer, Debra (Elsevier, 213)Ethnopharmacological relevance: Plectranthus barbatus is widely used in African countries as an herbal remedy to manage HIV/AIDS and related conditions. Aim of the study: To investigate the HIV-1 inhibitory, anti-inflammatory ... -
Inhibition of oxidative stress and skin aging-related enzymes by prenylated chalcones and other flavonoids from helichrysum teretifolium
Popoola, Olugbenga K.; Marnewick, Jeanine L.; Rautenbach, Fanie; Ameer, Farouk; Iwuoha, Emmanuel I.; Hussein, Ahmed A. (MDPI, 2015)Ten flavonoid-related structures viz. heliteretifolin (1), isoxanthohumol (2), 2',4',6'-trihydroxy-3'-prenylchalcone (3), isoglabranin (4), glabranin (5), 7-methoxyisoglabranin (6), quercetin (7), 4'-methoxyquercetin ... -
Marrubiin
Popoola, Olugbenga K.; Elbagory, Abdulrahman M.; Ameer, Farouk; Hussein, Ahmed A. (MDPI, 2013)The ethno-medicinal approach to drug discovery represents one of the most important sources of new and safe therapeutic agents to the challenges confronting modern medicine and daily life. Many of the traditionally ...