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Taylor, J.L.S.; Staden, J. Van

doi:10.1023/a:1013366926113

Cited by 30 publications

(7 citation statements)

References 14 publications

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“…However, these results were slightly higher than those reported by Cortes-Rojas, Chagas-Paula, Da Costa, Souza, and Oliveira (2013), Sreelatha and Padma (2009), Sultana, Anwar, and Ashraf (2009) and Ogbunugafor et al (2012). The difference could be attributed to variation in the environment where the plant was collected, the season, the physiological stage of the plant when they were harvested and extraction method (Taylor & Van Staden, 2001). …”

Section: Antioxidant Capacity Of the Plant Extractmentioning

confidence: 99%

In vitro antimicrobial activities of Bidens pilosa and Moringa oleifera leaf extracts and their effects on ground beef quality during cold storage

Falowo

Muchenje

Hugo

et al. 2016

CyTA - Journal of Food

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This study determined the activities of Bidens pilosa and Moringa oleifera leaf extracts on microbial count of ground beef during 6-day cold storage. Fresh ground beef sample was treated with butylated hydroxytoluene (BHT) (0.2 g/kg), M. oleifera (ML, 1 g/kg) and B. pilosa (BP, 1 g/kg) leaf extracts and compared with the control. The result of the phytochemical contents revealed that ML extract had higher phenolic and flavonoid contents than BP extract (p > 0.05). The antibacterial assay of the extracts revealed an appreciable broad-spectrum activity against tested bacteria with minimum inhibitory concentrations between 0.6 and 10.0 mg/mL. Addition of ML leaf extract to ground beef sample lowered total viable and lactic acid bacteria (p < 0.05) counts than control and BHT treatments at day 3 of storage. These results suggest that ML leaf extract could be used as potential sources of natural antimicrobial agent in meat products.Actividades antimicrobianas in vitro de extractos de hoja de Bidens pilosa y Moringa oleifera y sus efectos en la calidad de ternera triturada durante el almacenamiento en frío RESUMEN Este estudio determinó las actividades de los extractos de hoja de B. pilosa y M. oleifera en los recuentos microbianos de ternera triturada durante 6 días de almacenamiento en frío. Se trató con BHT una muestra fresca de ternera triturada (0,2 g/kg) y extractos de hoja M. oleifera (ML, 1 g/kg) y B. pilosa (BP, 1 g/kg), entonces estos fueron contrastados con la muestra control. Los resultados de los contenidos fitoquímicos revelaron que el extracto de ML tenía un mayor contenido fenólico y de flavonoides en comparación con el extracto de BP (p > 0,05). El ensayo antibacteriano de los extractos reveló una apreciable actividad de amplio espectro frente a las bacterias examinadas con concentraciones inhibitorias mínimas utilizando rangos entre 0,6 y 10,0 mg/mL. La adición de extracto de hoja de ML a la muestra de ternera triturada disminuyó el recuento total viable de bacteria ácido-láctica (p < 0,05) más que en la muestra control y los tratamientos de BHT en tercer día de almacenamiento. Estos resultados sugieren que el extracto de hoja de ML podría ser utilizado como fuente potencial de agente antimicrobiano natural en los productos cárnicos. ARTICLE HISTORY

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Section: Antioxidant Capacity Of the Plant Extractmentioning

confidence: 99%

In vitro antimicrobial activities of Bidens pilosa and Moringa oleifera leaf extracts and their effects on ground beef quality during cold storage

Falowo

Muchenje

Hugo

et al. 2016

CyTA - Journal of Food

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Section: Introductionmentioning

confidence: 99%

“…Eucomis (L.) L’Hér (Asparagaceae, formerly Hyacinthaceae) is a small genus consisting of bulbous geophytes extensively used in southern African traditional medicine [18,19,20,21,22]. Various plant parts and extract solvents of various Eucomis species have been tested for in vitro and in vivo antimicrobial screening [18,22,23,24,25]. It has been shown that Eucomis extracts inhibited Bacillus subtilis , Escherichia coli , and Staphylococcus aureus [22,23,24,25], as well as fungal cells, such as Candida albicans [24].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Accelerated UV-A and Q-SUN Irradiation on the Antibacterial Properties of Hydrophobic Coatings Containing Eucomis comosa Extract

et al. 2018

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The purpose of this research was to examine the antimicrobial properties against Gram-positive bacteria, as well as the water vapour characteristic of polylactic acid (PLA) films covered with a methyl–hydroxypropyl–cellulose (MHPC)/cocoa butter carrier containing Eucomis comosa extract as an active substance. The second purpose of the study was to evaluate the influence of accelerated UV-A and Q-SUN irradiation (UV-aging) on the antimicrobial properties and the barrier characteristic of the coatings. The results of the study revealed that MHPC/cocoa butter coatings had no influence on the growth of Staphylococcus aureus, Bacillus cereus, and Bacillus atrophaeus. MHPC/cocoa butter coatings containing E. comosa extract reduced the number of bacterial strains. MHPC/cocoa butter coatings also decreased the water vapour permeability of PLA. It was shown that accelerated UV-A and Q-SUN irradiations altered the chemical composition of the coatings containing cocoa butter. Despite the alteration of the chemical composition of the layers, the accelerated Q-SUN and UV-A irradiation had no influence on the antimicrobial properties of E. comosa extract coatings against S. aureus and B. cereus. It was found that only Q-SUN irradiation decreased the coating activity with an extract against B. atrophaeus, though this was to a small degree.

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“…The dichloromethane extract yielded the seven known compounds (7, 10, 19, 20, 21, 22 and 23) and ve novel triterpenoids (24 [the aglycone of 25], 26, 27, 28 and 29). The methanol extract was found to contain the known homoisoavonoid 30 as well as nine novel lanosterol glycosides (31)(32)(33)(34)(35)(36)(37)(38)(39). 18 Eucomis autumnalis (Mill.)…”

mentioning

confidence: 99%

“…34 The leaves of young plants showed greater COX-1 inhibitory activity than those of older plants, where the greatest activity was associated with bulbs and roots. 35 Six homoisoavanones (19,40,(47)(48)(49)(50) 14,36 and the optically active 2-hydroxy-2-[(4-hydroxyphenyl)methyl]butanedioic acid 51 have been isolated from the bulbs of Eucomis comosa (Houtt.) H. R. Wehrh.…”

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confidence: 99%

The chemistry and biological activity of the Hyacinthaceae

2013

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The Hyacinthaceae (sensu APGII), with approximately 900 species in about 70 genera, can be divided into three main subfamilies, the Hyacinthoideae, the Urgineoideae and the Ornithogaloideae, with a small fourth subfamily the Oziroëoideae, restricted to South America. The plants included in this family have long been used in traditional medicine for a wide range of medicinal applications. This, together with some significant toxicity to livestock has led to the chemical composition of many of the species being investigated. The compounds found are, for the most part, subfamily-restricted, with homoisoflavanones and spirocyclic nortriterpenoids characterising the Hyacinthoideae, bufadienolides characterising the Urgineoideae, and cardenolides and steroidal glycosides characterising the Ornithogaloideae. The phytochemical profiles of 38 genera of the Hyacinthaceae will be discussed as well as any biological activity associated with both crude extracts and compounds isolated. The Hyacinthaceae of southern Africa were last reviewed in 2000 (T. S. Pohl, N. R. Crouch and D. A. Mulholland, Curr. Org. Chem., 2000, 4, 1287-1324; ref. 1); the current contribution considers the family at a global level.

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Cited by 30 publications

References 14 publications

In vitro antimicrobial activities of Bidens pilosa and Moringa oleifera leaf extracts and their effects on ground beef quality during cold storage

In vitro antimicrobial activities of Bidens pilosa and Moringa oleifera leaf extracts and their effects on ground beef quality during cold storage

The Influence of Accelerated UV-A and Q-SUN Irradiation on the Antibacterial Properties of Hydrophobic Coatings Containing Eucomis comosa Extract

The chemistry and biological activity of the Hyacinthaceae

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