• Journal of Convergence for Information Technology
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• v.12 no.3
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• pp.236-243
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• 2022

This study attempted to find the optimum amount of manuka extract ingredient with hair treatments in different manuka extract contents and examine its bleached hair protection effects. For this, the tensile strength and moisture level of the damaged hair were measured. In addition, hair conditions were analyzed, using SEM and FE-SEM. In terms of protection of bleached hair, all experimental groups (M1, M2, M3) were more effective than the control group (no manuka extract added) in tensile strength, moisture level, hair thickness and cuticle conditions. In particular, 'M3 (3% manuka extract)' revealed the largest hair protection effects. The above results confirm that Manuka extract-added hair treatments would be useful in protecting damaged hair as well as scalp as a cosmetic material. It is anticipated that there would be further studies on diverse chemical treatments with a much wider variety of samples.

• YAKHAK HOEJI
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• v.41 no.1
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• pp.132-138
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• 1997

The antimicrobial activity of Manuka oil, a steam distillate from Leptospermum scoparium, was investigated, and it's MIC against ten kinds of microorganisms was determin ed. MICs against bacteria and fungi were measured by means of both two-fold dliution method and agar plate two-fold dilution method, respectively. MICs of Manuka oil against Staphylococcus aureus KCTC 1916 and Micrococcus luteus KCTC 1915, gram-positive microrganisms, were identical as 3.05 ${\mu}$g/ml, while it's antibacterial activity against gram-negative microrganisms such as Pseudomonas aeruginosa KCTC 2513, Escherichia coli KCFC 1682, Klebsiella pneunioniae KCTC 2001 or Proteus vulgaris KCTC 2433 was negligible(MIC: ${\geq}$ 1000 ${\mu}$g/ml), suggesting a high susceptibility of gram-positive bacteria to Manuka oil. In addition, MIC against Aspergillus niger KCTC 6077 was 24 ${\mu}$g/ml. and that against the other fungi, Tricophyton mentagrophytes KCTC 1374 and Candida albicans KCTC 1940 was ${\geq}$ 1000 ${\mu}$g/ml. When Manuka oil ointment was used in combination with other drugs. i.e.. gentamycin sulfate, chlotrimazol and hydrocortisone acetate, and diphenhydramine HCl and hydrocortisone acetate. it's antibacterial activity against Staphylococcus aureus KCTC 1916 was higher than Manuka oil ointment or other drugs alone. In conclusion, Manuka oil possesses a selective antibacterial activity against Staphylococcus aureus KCTC 1916, and can be used as a potent antibacterial agent against it.