Abstract
The Cinnamomum genus is a plant of the Lauraceae family. This plant is widely spread on the island of Borneo. In this study, the essential oils of plant leaves originating from the Cinnamomum genus were tested for their antimicrobial activity. The types of plants are Cinnamomum burmannii, Cinnamomum parthenoxylon, and Cinnamomum inners. The essential oils derived from the leaves of Cinnamommum genus which grown in East Kalimantan were obtained by steam distillation. The yield of 0.6% 1.64%, and 0.01% of essential oil were obtained from C. burmannii, C. parthenoxylon, and C. inners, respectively. The oils were examined by gas chromatography to determine their major constituents. The major constitutents of C. burmannii were eugenol (85.03%), C. parthenoxylon were safrole (55.38%), while the major constituents of the C. inners were Cyclobutal (1,2,3,4) dicyclooctene,hexadecahydro (17.94%). The essential oils were also examined for their antimicrobial activities on yeasts and bacteria. The microbial used were Streptococcus mutans, Streptococcus sobrinus, Candida albicans, and Staphylococcus aureus. Two methods (agar diffusion and broth microdilution) were used to assess the antimicrobial activity. The Minimum Inhibitory Concentration (MIC) and minimum bactericidal concentration (MBC) were determined in every case. All types of plants Cinnamomum genus in this study has the potential in inhibiting the growth of Streptoccus mutans, Streptococcus sobrinus, Candida albicans, and Staphylococcus aureus.
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