• 치위생과학회지
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• 제23권1호
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• pp.51-59
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• 2023

Background: Tea tree oil has antiviral, antimicrobial and antifungal effects and Mastic oil has antifungal and anticancer effects. For synergistic effects of oils, blending oil containing a mixture of two to three oils is recommended. This study aimed to determine the antibacterial effects of Tea tree oil, Mastic oil, and Blending oil containing the two oils in a mixture, to verify and suggest the potential use of these oils as a substance to prevent dental caries. Methods: Tea tree oil, Mastic oil, and Blending oil with a 1:1 blend of the two oils were diluted in liquid medium to 0% (negative control), 0.5%, 1.0%, and 2.0%. Streptococcus mutans was applied to each experimental group of the three diluted oils and after 8 h culture, the optical density (OD) was measured and the growth inhibition rate for S. mutans was estimated. Results: Tea tree oil had significantly low OD values across all concentrations (p<0.05) without significant variation among different concentrations (p>0.05). Mastic oil did not significantly vary in OD compared to the negative control across all concentrations (p>0.05) without significant variation among different concentrations (p>0.05). Blending oil, compared to the negative control, did not significantly vary in OD at 0.5% (p>0.05) but significant variation was found as the concentration increased (p<0.05). Additionally, for Tea tree oil and Mastic oil, the growth inhibition rate showed no significant variation according to concentration (p>0.05), whereas for Blending oil, the growth inhibition rate for S. mutans showed a significant difference at 1.0% (p<0.05) and at higher concentrations. Conclusion: Blending oil containing a Tea tree oil and Mastic oil demonstrated a significant growth inhibition effect on S. mutans from the concentration of 1.0%, which suggested its potential use as an effective antibacterial agent for dental caries.

• International Journal of Internet, Broadcasting and Communication
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• 제14권3호
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• pp.171-181
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• 2022

Purpose: In this paper, we show our blending ratio of 10 types of Essential Oils that survives beneficial bacteria and kills harmful bacteria in the scalp, and we investigate the possibility of application of our blending ratio to the development of anti-dandruff products and the possibility of being used as a raw material for clinical beauty and customized cosmetics. Methods: The scalp microorganisms used in our study were M. furfur, S. epidermidis, E. coli, and P. nitroreducens. There are a total of 10 Essential Oils such as True Lavender, Lime, Roman chamomile, Rosemary camphor, Cedarwood, Geranium, Clove, Tea tree, Palmalosa, and Peppermint. The antibacterial test of the blended Essential Oil was carried out according to the test method of the standardized evaluation methodology of "Food and Food Additives Code". Since M. furfur is related to the growth of sebum in the scalp, in this study we used the fnLNB and the fnLNA with 20 ㎖ of whole fat cow milk added. Results: The blending ratio of EO, which inhibits dandruff-causing bacteria such as M. furfur, S. epidermidis, E. coli, and does not inhibit P. nitroreducens showing dominant growth in a healthy scalp, was B8(Clove 0.2%, Roman chamomile 0.5%, Tea tree 0.3%), B9(Geranium 0.1%, Palmarosa 0.1%, Roman chamomile 0.5%, Tea tree 0.3%), B10(Clove 0.1%, Geranium 0.1%, Palmarosa 0.1%, Roman chamomile 0.5%, Tea tree 0.2%). Conclusion: It is thought that the blending ratio of BEO obtained as a result of this study can provide a basis for use as an alternative to antibiotics in developing anti-dandruff drugs and emerge as a new alternative to solve scalp microbial imbalance. In order for EO to be used as a useful raw material for anti-dandruff preparation, researches on 1) Standardization (the effects of products differ according to the types, regions, climate, extraction methods, etc.), 2) Antimicrobial effects, 3) Safety, etc., must be established.

• 치위생과학회지
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• 제22권1호
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• pp.57-66
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• 2022

Background: This study aimed to investigate the effect of selecting commercially available blending teas and applying them to bovine teeth on color change over time. Methods: After selecting healthy bovine teeth, using a cutting-disc, 105 specimens with a dimension of 5×5×3 mm were prepared, and 15 specimens were distributed to each group. Black tea was used as a positive control, water was used as a negative control, and blended tea of five types was used as an experimental group. First, pH and buffering capacity were measured with a pH meter, and tooth color was determined using a spectrophotometer before immersion in the blending tea solution and 1, 5, 7, 14, and 21 days after immersion. Thereafter, the shape change of the enamel surface was observed using a scanning electron microscope, and SPSS ver.26 was used to analyze the color change. Results: The average pH of the five blending teas in the experimental group was 3.78, and the pH of group 3 (strawberry rhubarb) was the lowest at 3.22. The pH levels of black tea and water were 5.19 and 7.30, respectively. The buffering capacity was the highest in group 3 at both pH levels of 5.5 and 7.0. The L^*a^*b^* color change according to immersion time was the largest in group 4 (rooibos yellow flower), and the amount of color change was large in black tea and group 4. As a result of observing the enamel surface of bovine teeth, changes in the surface shape were noted in all groups immersed in the experimental solution for 21 days, except for water. Conclusion: There was a significant difference between the experimental groups in terms of color change according to the immersion time, and color and enamel surface changes were observed in black tea and all experimental groups, except for water.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2005년도 하계학술대회 논문집 Vol.6
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• pp.127-128
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• 2005

UV-curable pressure sensitive adhesives were prepared by blending acrylic copolymer, copolymerized with butyl acrylate (BA), acrylic acid (AA) and vinyl acetate (VAc) by solution polymerization, triethyl amine (TEA) and trimethylolpropane triacrylate (TMPTA). The PSAs were evaluated by peel strength with varying contents of TMPTA and UV dose, and also glass transition temperature($T_g$) of PSAs were measured. When exposed on UV irradiation, the PSAs showed the decreased peel strength and increased $T_g$. And following UV irradiation, the PSAs did not leave any residue on wafer after peel off PSA.

• Macromolecular Research
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• 제14권3호
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• pp.373-382
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• 2006

A series of crosslinkable, waterborne polyurethanes (I-WBPUs) were prepared by in-situ polymerization using isophorone diisocyanate (IPDI)/poly(tetramethylene oxide) glycol (PTMG, $M_n$=2,000)/dimethylol propionic acid (DMPA)/ethylene diamine (EDA)/triethylamine (TEA)/aminoplast[hexakis(methoxymethyl)melamine (HMMM)] as a crosslinking agent. Typical crosslinkable, waterborne polyurethanes (B-WBPUs) blended from WBPU dispersion and aqueous HMMM solution was also prepared to compare with the I-WBPUs. The crosslinking reaction between WBPU and HMMM was verified using FTIR and XPS analysis. The effect of the HMMM contents on the dynamic mechanical thermal, thermal, mechanical, and adhesion properties of the I-WBPU and B-WBPU films were investigated. The storage modulus(E'), glass transition temperatures of the soft segment ($T_{gs}$) and the amorphous regions of higher order ($T_{gh}$), melting temperature ($T_m$), integral procedural decomposition temperature (IPDT), residual weight, $T_{10%}$ and $T_{50%}$ (the temperature where 10 and 50% weight loss occurred), tensile strength, initial modulus, hardness, and adhesive strength of both I-WBPU and B-WBPU systems increased with increasing HMMM content. However, these properties of the I-WBPU system were higher than those of the B-WBPU system at the same HMMM content. These results confirmed the in-situ polymerization used in this study to be a more effective method to improve the properties of the WBPU materials compared to the simple blending process.

• 스트레스연구
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• 제25권4호
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• pp.239-245
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• 2017

본 연구는 아로마테라피 족욕이 스트레스와 자율신경계의 활성도에 미치는 효과를 비교하기 위한 연구이다. 실험 처치로 아로마테라피 족욕 군에게는 에센셜 오일 라벤더, 레몬, 티트리를 6:3:1의 비율로 혼합한 후 18 L의 물에 0.5 cc 떨어뜨려 족욕을 하도록 하였고, 족욕 군은 물로만 족욕을 하도록 하였다. 연구결과로 아로마테라피 족욕은 주관적 스트레스 점수(t=3.465, p=0.001), 스트레스 지수(t=3.021, p=0.004)가 유의하게 감소하였으며, 교감신경 활성도는 아로마테라피 족욕 군이 더 유의하게 증가하였고(t=-2.913, p=0.005), 부교감신경 활성도는 유의한 차이가 나타나지 않았다(t=-1.831, p=0.072). 결론적으로 아로마테라피 족욕과 족욕 모두 스트레스를 완화하는 데 효과적이었으며 그 중 아로마테라피 족욕이 스트레스를 더 완화했다. 그러므로 아로마테라피 족욕이 스트레스 감소를 위한 효과적인 중재가 될 수 있으므로, 건강한 성인뿐만 아니라 간호 대상자의 스트레스 감소를 위한 중재로 적극적으로 활용될 수 있으리라 생각한다.

• 대한임상검사과학회지
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• 제49권3호
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• pp.256-262
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• 2017

식물로부터 유래되는 휘발성 유기 화합물인 에센셜 오일은 인체에 약리효과를 나타낸다고 알려져 있다. 본 연구에서는 화농성 질환과 병독성 질환 비뇨기계통 감염에 나올 수 있는 병원성 세균 Staphylococcus aureus (그람양성알균), Escherichia coli (그람음성막대균), Pseudomonas aeruginosa (그람음성막대균, 극성단모균)을 대상으로 천연 허브 오일 중에 비교적 많이 알려져 있는 라벤더(lavender), 티트리(tea tree), 로즈마리(rosemary), 멜리사(melisa) 4종류의 단일 오일과 비교해, 티트리와 로즈마리, 멜리사를 블렌딩하였을 때 항균력이 상승되는 효과가 있는지 연구하였다. 그 결과 디스크 확산법에서 블렌딩 오일(티트리, 로즈마리, 멜리사)의 경우 단독의 허브오일보다 S. aureus에서18 mm, E. coli 에서 22 mm 와 P. aeruginosa는13 mm의 우수한 항균능력을 확인할 수 있었다. 뿐만 아니라 블렌딩 오일의 경우 최소억제농도(Minimum Inhibitory Concentrations, MIC) 분석에서 S. aureus, E. coli 에서는 0.3125%에서, P. aeruginosa는 1.25%에서 성장억제효과가 확인되었다. 따라서 본 실험에서는 블렌딩 오일이 Oxacillin과 로즈마리, 티트리보다 항균효과가 우수한 것으로 증명되어 단독의 허브오일보다 블렌딩 오일이 우수한 항균력을 나타나는 것을 확인할 수 있었다. 그러므로 허브의 블렌딩을 활용하면 다제 내성균에 대한 항균시너지효과를 발휘할 수 있음을 입증했을 뿐만 아니라 향후 천연보존제와 건강기능성 식품 및 화장품에 활용 가능성을 기대해본다.