In this study, essential oils from Cymbopogon citratus and Ceasalpinia decapitala leaves, Citrus lemon and Citrus sinens＆ peels, were extracted, chemically characterized and evaluated on both Gram positive and Gram n...In this study, essential oils from Cymbopogon citratus and Ceasalpinia decapitala leaves, Citrus lemon and Citrus sinens＆ peels, were extracted, chemically characterized and evaluated on both Gram positive and Gram negative bacteria, Salmonella Typhimurium, Escherichia coli, Listeria innocua, Staphylococcus aureus, Klebsiella pneumonia and Streptococcus pyogenes. Essential oil of C. citratus was found to be rich in geranial （33.0%） and neral （49.7%）, that from C. decapitala in 13-pinene （8.4%）, ct-pinene （25.5%）, 13-ocymene （31.6%）, 15-phellandrene （8.4%）, caryophyllene （7.5%） and geranial （5.9%）. The essential oil from C. lemon and C. sinensis where mainly composed by limonene with percentages of 77.5% and 83.3% respectively, and 13-phellandrene with percentages of 8.1% and 10.8% for the essential oil of C. lemon and C. sinensis, respectively. The antibacterial activity assessment realized on different microorganisms contaminating food showed that essential oil from C. citratus was shah more effective against all tested bacteria while that from C. sinensis was the less active essential oil. The incorporation of essential oils in HPC （hydroxy-propyl cellulose） films showed that those essential oils, especially essential oils from C. citratus, maintained their antibacterial activities against targeted microorganisms and therefore can be applied in food packing.展开更多
文摘In this study, essential oils from Cymbopogon citratus and Ceasalpinia decapitala leaves, Citrus lemon and Citrus sinens＆ peels, were extracted, chemically characterized and evaluated on both Gram positive and Gram negative bacteria, Salmonella Typhimurium, Escherichia coli, Listeria innocua, Staphylococcus aureus, Klebsiella pneumonia and Streptococcus pyogenes. Essential oil of C. citratus was found to be rich in geranial （33.0%） and neral （49.7%）, that from C. decapitala in 13-pinene （8.4%）, ct-pinene （25.5%）, 13-ocymene （31.6%）, 15-phellandrene （8.4%）, caryophyllene （7.5%） and geranial （5.9%）. The essential oil from C. lemon and C. sinensis where mainly composed by limonene with percentages of 77.5% and 83.3% respectively, and 13-phellandrene with percentages of 8.1% and 10.8% for the essential oil of C. lemon and C. sinensis, respectively. The antibacterial activity assessment realized on different microorganisms contaminating food showed that essential oil from C. citratus was shah more effective against all tested bacteria while that from C. sinensis was the less active essential oil. The incorporation of essential oils in HPC （hydroxy-propyl cellulose） films showed that those essential oils, especially essential oils from C. citratus, maintained their antibacterial activities against targeted microorganisms and therefore can be applied in food packing.
