柠檬草和石竹叶提取物的化学成分及抑菌活性研究

Akintoyese O Alabi
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引用次数: 2

摘要

采用标准方法研究了毛茛(Phyllantus amarus, PA)(碎石料)、香茅(Cymbopogon citratus, CC)(柠檬草)鲜叶和干叶乙醇提取物和水提取物的化学成分、抗氧化和抗菌活性,以及碎石料和柠檬草(PA/CC和DL/DP)的组合。近因和矿物分析结果表明,鲜、干叶香和香茅分别富含粗纤维(18.53%、14.65%)、灰分(16.27%、2.29%)、钾(95.56 mg/100g、54.04 mg/100g)、钙(58.57 mg/100g、7.05 mg/100g)和钠(15.23 mg/100g、9.84 mg/100g)。对2,2二苯基-2-苦酰基-肼基(DPPH)自由基的清除能力表明,新鲜PA的清除能力最高,为91.12 mg/g,其次为(PA/CC) 90.93 mg/g,干燥PA为85.61mg/g。提取物的植物化学成分分析表明,其心脏苷(11.62 mg/g ~ 64.81 mg/g)、萜类化合物(14.56 mg/g ~ 69.66 mg/g)、酚(14.73 mg/g ~ 53.93 mg/g)、皂苷(22.61 mg/g ~ 30.47mg/g)含量较高。柠檬干和毛竹干(DL/DP)中维生素A含量最高(22.22 mg/g),而鲜柠檬草中维生素E含量最低(0.36mg/g)。抑菌试验表明,两种提取物对蜡样芽孢杆菌、痢疾志贺氏菌、大肠杆菌、沙门氏菌、金黄色葡萄球菌、假单胞菌等食源性病原菌均有较强的抑菌活性。抑制区为4.3 mm -9.1mm。应开展进一步的研究,以调查在功能性食品生产中的应用
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Chemical Composition and Antibacterial Activity of Extracts of Cymbopogon Citratus (Lemon Grass) and Phyllantus Amarus (Stone Breaker) Leaves
This study described the chemical composition, antioxidant and antibacterial activities of the ethanol and aqueous extracts of fresh and dried leaves of Phyllantus amarus (PA) (Stone breaker), Cymbopogon citratus (CC) (Lemon grass) and combination of stone breaker and lemon grass (PA/CC and DL/DP) using standard methods. The proximate and mineral results showed that both fresh and dried samples of Phyllantus amarus and Cymbopogon citratus were rich in crude fibre (18.53%, 14.65%), ash (16.27%, 2.29%), potassium (95.56 mg/100g, 54.04 mg/100g), calcium (58.57 mg/100g, 7.05 mg/100g), and sodium (15.23 mg/100g, 9.84 mg/100g) respectively. The ability of the extracts to scavenge 2, 2 diphenyl -2- picryl-hydrazyl (DPPH) radical showed that the fresh PA had the highest scavenging activity of 91.12 mg/g, followed (PA/CC) 90.93 mg/g and dried PA (85.61mg/g). The phytochemical composition of the extracts also revealed that they contain high content of cardiac glycoside (11.62 mg/g - 64.81 mg/g), terpenoid (14.56 mg/g - 69.66 mg/g), phenol (14.73 mg/g - 53.93 mg/g), saponin (22.61 mg/g - 30.47mg/g). Dried lemon and dried Phyllantus amarus (DL/DP) was found to be rich in Vitamin A (22.22 mg/g), while the lowest value of Vitamin E (0.36 mg/g) was obtained from fresh lemon grass (0.36mg/g). Antibacterial assay carried out on the two leaves extracts showed that they produced mild antibacterial activity against some foodborne pathogen (Bacillus cereus, Shigella dysenteriae, Escherichia coli, Salmonella spp, Staphylococcus aureus, Pseudomonas spp). with zones of inhibition of 4.3 mm -9.1mm. Further studies should be carried out to investigate the employment of the leaves in production of functional food
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