Antibacterial Activity of the Mixed Systems Containing 1,2-Dodecanediol against <i>Staphylococcus aureus</i> and <i>Staphylococcus epidermidis</i>

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  • Okukawa Minako
    Department of Biochemical Engineering, Graduate School of Science and Engineering, Yamagata University
  • Yoshizaki Yuika
    Department of Biochemical Engineering, Graduate School of Science and Engineering, Yamagata University
  • Tanaka Mayu
    Department of Biochemical Engineering, Graduate School of Science and Engineering, Yamagata University
  • Yano Shigekazu
    Department of Biochemical Engineering, Graduate School of Science and Engineering, Yamagata University
  • Nonomura Yoshimune
    Department of Biochemical Engineering, Graduate School of Science and Engineering, Yamagata University

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  • Antibacterial Activity of the Mixed Systems Containing 1,2-Dodecanediol against Staphylococcus aureus and Staphylococcus epidermidis

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<p>1,2-Alkanediols are characteristic cosmetic ingredients because these moisturizers exhibit the antibacterial activity against Staphylococcus aureus (S. aureus) and Staphylococcus epidermidis (S. epidermidis). However, the antimicrobial behavior in mixed systems containing several active ingredients is unclear because previous reports focus on an antibacterial system containing only 1,2-alkanediol. In this study, the minimal inhibitory concentration (MIC) and the fractional inhibitory concentration (FIC) were evaluated for 1,2-dodecanediol/lactic acid, 1,2-dodecanediol/myristic acid, 1,2-dodecanediol/methylparaben, and 1,2-dodecanediol/isopropyl methylphenol mixed systems to show the effect of the addition of other antimicrobial components to 1,2-dodecanediol. The antibacterial property of 1,2-dodecanediol/lactic acid mixed system was almost similar compared to 1,2-dodecanediol monomeric system. On the other hand, the antimicrobial activity of 1,2-dodecanediol against S. epidermidis was inhibited in the 1,2-dodecanediol/myristic acid mixed system. Because the selective antimicrobial activity of myristic acid against S. aureus was demonstrated in the mixed system. The present findings are useful for designing formulations of cosmetics and body cleansers containing 1,2-dodecanediol.</p>

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