الفهرس يوجد فقط 14 صفحة متاحة للعرض العام
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المستخلص
The present investigation was carried out in an effort to open a new area for the possibility of using some plant essential oils as antimicrobial agents. For this purpose, 8 essential oils were studied ”Ocimum basilicum, Carium carvum, Foeniculum vulgare, Pelargonium radula, Cymbopogon citratus, Origanum majoranum, Menthe piperita and Thymus capitatus” in order to investigate their antimicrobial effect and the possibility of using it as natural preservatives.
The main experimental results can be summarized in the following:
1- Seventeen microbial species (ten fungi, two yeasts and five bacteria) were isolated and identified from fresh juices of orange, guava and banana incubated at room temperature for seven days.
2- The eight essential oils test revealed different degree of antimicrobial activity against these isolates.
3- Cymbopogon citratus, Ocimum basilicum and Origanum majoranum essential oils were the highly effective against the microorganisms isolated from juices.
4- Aspergillus niger, A. flavus and Saccharomyces cerevisiae were found common in juices and appeared highest resistance against these essential oils.
5- GC-MS analysis showed that the main components of Cymbopogon citratus essential oil were e-citral, a-Myrcene and z-citral constituting about 75% of this oil, while Benzynen, 1-methyl-4-(2-propenyl) and 1,8-cineole were the major among17 components constituting about 86.8% of Ocimum basilicum essential oil, and C-Terpinene