• 한국연초학회지
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• 제25권1호
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• pp.70-79
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• 2003

$\beta$ -Glucosidase-catalysed synthesis of glucosides with aromatic alcohols and monoterpene alcohols as accepters and cellobiose as a donor in the presence of various commercial $\beta$ -glucosidases were described. $\beta$ -Glucosidases from Aspergillus niger spp,. Trichoderma spp., Penicillium sup. and bitter almond have been shown to catalyze synthesis of $\beta$ -glucosides of benzyl alcohol, 2-hydroxybenzyl alcohol, 4-hydroxybenzyl alcohol, 2-phenylethyl alcohol, geraniol and citronellol in the presence of cellobiose as sugar donor. Among enzyme preparations tested, each $\beta$ -glucosides prepared from Aspergillus niger were isolated in the pure state by Diaion HP-20 and silica gel column chromatography. The products were identified as $\beta$ -glucosyl products of benzyl alcohol, 2-hydroxyhenzyl alcohol, 4-hydroxybenzyl alcohol, 2-phenyl ethyl alcohol, geraniol and citronellol by spectrometry (UV, IR, $^1$H-NMR, $^{13}$ C-NMR) and enzymatic hydrolysis with $\beta$ - glucosidase. Monoterpene alcohols with a sterically hindered hydroxyl group, such as linalool, $\ell$-menthol and $\alpha$-terpineol were not used as acceptors in transglycosylation reaction.

• International Journal of Oral Biology
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• 제31권4호
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• pp.135-140
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• 2006

Temperature signaling can be initiated by members of transient receptor potential (thermo-TRP) channels. Hot and cold substances applied to teeth usually elicit pain sensation. Since odontoblasts constitute a well-defined layer between the pulp and the mineralized dentin, being first to encounter thermal stimulation from oral cavity, they may be involved in sensory transduction process, in addition to their primary function as formation of dentin. We investigated whether thermo-TRP channels are expressed in a odontoblast cell line, MDPC-23. The expressions of thermo-TRP channels were examined using reverse transcription polymerase chain reaction (RT-PCR), immunohistochemistry, fluorometric calcium imaging. Analysis of RT-PCR revealed mRNA expression of TRPV1, TRPV2, TRPV4 and TRPM8, but no TRPV3, TRPA1. Immunohistochemical approach failed to detect TRPV1 expression. Whereas the application of 4-phorbol-12,13-didecanoate($10\;{\mu}M$, a TRPV4 agonist), menthol(1 mM, a TRPM8 agonist) and icilin($10\;{\mu}M$, a TRPM8 agonist) produced the enhancement of intracellular calcium concentration, capsaicin($1\;{\mu}M$, a TRPV1 agonist) did not. Our results suggest that subfamily of thermo-TRP channels expressed in odontoblasts may serve as thermal or mechanical transducer in teeth.

• 대한의용생체공학회:의공학회지
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• 제18권3호
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• pp.315-323
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• 1997

Driving is a complex vigilance task that includes improper lookout, excessive speed and inattention. The primary objective of this research is to detect driver drowsiness so that the driver can be alerted to an impending traffic accident in performance. We developed the automatic detection and warning system during drowsy driving. A drowsiness detection system must be able to monitor driver status and detect the detrimental changes of a driver performance. Eyeblink has been found to be a reliable factor of drowsiness detection in earlier studies. As an additional parameter, we also considered the yawning which often occurs in a low vigilance state and predicts the drowsy state. We used a computer vision method to extract the eyeblink and yawning in the face image sequences. When the drowsy state was detected, the driver was refreshed by alarming device and menthol scent generator after deciding the warning level by fuzzy logic. For the evaluation of our system, we measured the physiological parameters such as EOG and EEG. The results indicated that it is possible to detect and alert the driver drowsiness temporarily or continuously by using our system.

• Journal of Pharmaceutical Investigation
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• 제33권1호
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• pp.21-28
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• 2003

Ketorolac tromethamine(KT) is a nonsteroidal agent with potent analgesic and moderate anti-inflammatory activity. The lipid-water partition coefficient of KT was evaluated and KT gel was formulated as a gel containing different pH, different concentrations of polymer (poloxamer 407, carbopol 941), propylene glycol, ethanol and various enhancers. The resulting KT gels were evaluated with respect to their viscosity, in vitro drug permeation rate through hairless mouse skin and stability. In n-octanol and chloroform, the lipid-water partition coefficient of KT was the highest at pH 4 phosphate buffer. The apparent viscosity of KT gel increased with an increase in gel pH, polymer and enhancer concentration. But the apparent viscosity of KT gel decreased with an increase in ethanol concentration. The permeation rate of KT through hairless mouse skin from gels different pH was maximum at pH 4 which is close to KT $pK_{a}$ 3.54. The permeation rate decreased with an increase in polymer, propylene glycol concentration. But the permeation rate increased with an increase in ethanol. The increase of drug concentration from 1 to 3% induced linear increase in permeation rate. The best enhancer was the combination of $Labrasol^{\circledR},\;Transcutol^{\circledR}$, oleic acid and l-menthol. In the accelerated stability test(25, 40 and $50{\circ}C$), pH 5 gel was most stable and pH 4 gel was most unstable for 90 days.

• 한국가정과학회지
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• 제4권1호
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• pp.79-92
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• 2001

본 연구에서는 미생물의 대사체계를 이용하여 유자껍질내의 유자정유성분을 생전환 시키므로써 고부가가치 고기능성 천연향의 발굴 생산을 시도하였다. 유자정유 성분 대사능 유전자를 지닌 E. coli 형질전환주 EC3, EC4, EC6의 공동 배양액을 유자정유가 유일한 탄소원인 M9배지에서 28$^{\circ}C$로 진탕배양 하였다. 각 공동 배양액(EC3+EC4. EC3+EC6, EC4+EC6 and EC3+C4+EC6)은 각 형질전환주의 단독배양 보다 3∼4배 더 높은 생육도를 나타냄을 알 수 있었다. 공동배양에 의해 생전환된 물질들은 GC-MS에 의해 확인하였다. 각 공동배양액의 주요한 대사산물로는 linalool, 4-terpineol, ${\alpha}$-terpineol이 공통적으로 검출되었다. 소량씩 존재하나 배양액의 주요한 향을 결정할 것으로 보이는 각기 다른 terpene 계열 화합물들이 각각의 공동배양액 대사산물로 검출 되었는데, 공동배양액EC3+EC4에서는 elemol, ocimene, nonanal, trans-2-nonenal이 공동배양액EC3+EC6에서는 cis-ocimene, 2-octanol, octanal. ${\alpha}$-terpinolene, 공동배양액 C4+EC6에서는 ocimene, 그리고 공동배양액EC3+EC4+EC6에서는 nonanal, 2-octenol, iso-menthol, ocimene이 각각 검출되었다.

• 한국산학기술학회논문지
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• 제18권12호
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• pp.329-334
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• 2017

본 논문은 새로운 과립형태의 구강청결제 개발에 있어 동등한 항균력을 가지면서 고형상에서 주성분간의 공융혼합물 생성에 따른 과립의 흐름성 부족을 개선하기 위해 과립의 표면을 흡착시키는 Magnesium aluminometasilicate (Neusilin)이라는 물질을 활용하여 흐름성을 개선하고 부가적으로 구강에서의 붕해시간 및 잔물감이 적은 특성을 가지는 새로운 과립형태의 구강청결제를 제조하였다. 제조된 과립의 흐름성, 밀도, 건조감량 등의 과립특성에 대한 확인을 통해 Neusilin의 양이 전체 과립양 대비 10%이상이 투입되었을 경우 과립의 특성이 개선되는 결과를 확인하였다. 또한 인공타액에서의 붕해시험 및 사람의 구강에서 붕해시간과 잔여물시험 등의 관능시험을 진행하여 보다 개선된 붕해특성 및 관능시험 결과를 확인할 수 있었으며 항균시험을 통해서 이미 시장에서 판매중인 액제형 구강청결제와 동등한 항균력을 보여주는 것으로 확인하였다. 본 연구를 통해 제조된 과립형태의 구강청결제 조성물은 공융혼합물로서 유사한 특성을 가지는 서로 다른 약물을 동시에 함유하는 의약품의 개발에 활용될 수 있어 제약산업의 의약품 개발에서 유용할 것으로 사료된다.

• 한국식품과학회지
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• 제26권5호
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• pp.512-519
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• 1994

박하를 대상으로 재배조건 및 수확시기에 빠른 방향 성분의 함량변화를 조사한 결과 박하의 생육은 비닐보온시험구에서 초기에 왕성한 생육을 보였지만, 수확기가 가까와 짐에 따라 다른 시험구와 유사하게 성장하였으며, 강유량과 일조시간에 따라 줄기와 잎의 성장속도에서 매우 많은 차이를 보였다. 수확시기에 따른 조성분의 변화는 l-menthone의 l-menthol로의 환원과정이 일조시간의 차이에 따라 그 진행속도가 빨라졌으며, 수확말기에 가서는 특히 menthofuran의 함량이 급속히 증가하는 현상을 보였다. 따라서 전체적으로 정유 조성분의 비율이 가장 양호한 시험구는 7월 5일과 7월 7일 수확분으로서, 이 시기가 수확 적기임을 알 수 있었고 정유의 우율도 이 시기에 가장 높게 확인되었다.

• 한국식품조리과학회지
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• 제22권6호통권96호
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• pp.774-782
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• 2006

갓 채취한 야산재배 더덕의 휘발성 향기성분을 Head space sampling 방법으로 추출하고 GC/MS로 분석한 결과 terpene 및 terpene alcohol류 28종, hydrocarbon류 34종, alcohol류 31종, aldehyde 및 ketone류 13종, ester류 25종, acid류 6종, ether류 10종 등 총 167 종의 휘발성 향기성분을 확인하였다. 크로마토그램 상에서 차지하는 면적 비율이 큰 10대 주요 휘발성 성분은 dl-limonene(10.2%), ${\alpha}$-guaiene(9.0%), 2,2,6-trimethyl-octane(8.6%), hexadecane(8.0%), isolongifolan-8-ol(4.2%), 2,4,4-trimethyl-1,3-pentanediol diisobutyrate(4.1%), ${\beta}$-selinene(3.9%), 2,2,3-trimethylnonane(3.6%), 3-methyl-5-propyl-nonane(3.1%), 및 ledene(3.1%) 등으로 주로 20분 이내와 40${\sim}$60분 범위에서 나타났으며, 전체의 58%를 차지하였다. 식품의 향기는 기계적 분석 결과만으로 설명하기 어려우므로 전문 조향사들의 도움을 받아 관능평가를 실시하였으며, 그 결과 신선 더덕의 향기 특성으로 풋냄새, 흙냄새, 우유발효 냄새 및 장뇌냄새 등이 묘사되었다. 이러한 향기 특성을 GC/MS에서 확인된 20대 주요 휘발성 성분들과 관련시켜 보면, dl-limonene은 풋냄새 성분이며, ${\alpha}$-guaiene과 isolongifolan-8-ol은 흙냄새를, 우유발효취를 내는 성분들에는 2,2,6-trimethyloctane, hexadecane, 3-methyl-5-propylnonane, 2,2,3-trimethylnonane 등이 속하였다. 이 외에 과일향을 내는 2,4,4-trimethyl-1,3-pentanediol diisobutyrate와 쓴냄새 성분인 ${\beta}$-selinene, ledene, isoledene, ${\delta}$-cadinene 및 나무 냄새를 갖는 ${\alpha}$-humulene, dihydro-${\beta}$-agarofuran 등도 식품의 향기와 관련이 있는 것들이다. 이에 반해 풋냄새와 관련 있는 성분들 즉, 1-hexanol, 2-methylhexan-3-ol, 3-hexen-1-ol, cis-3-hexenyl butyrate, ethylhexanol, hexyl acetate, trans-2-hexen-1-ol이나 camphor, longiborneol, menthol 등 장뇌냄새의 원인 물질은 함유량이 상대적으로 적은데도 불구하고 전문조향사들은 신선 더덕의 특징적인 향기로 풋냄새와 장뇌취를 선정하였다. 따라서 유통업자를 중심으로 향기 특성 및 강도를 판정할 수 있는 훈련이이루어진다면 향기는 더덕의 신선도를 판정하는 지표로 활용될 수 있다고 생각된다.

• Journal of Periodontal and Implant Science
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• 제29권1호
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• pp.141-151
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• 1999

To evaluate the effect of cetylpyridinium chloride in a powder form when used concomitantly with a commercial flouride containing tooth paste on inhibition of plaque formation, on gingivitis, and on irritation of oral mucosa, a double--blind, randomized parallel study was set up. Cetylpyridinium chloride was incorporated into a ligh brown colored powder with menthol added for scent. There were no diffemces between the active agent and the placebo which did not contain cetylpyridinium chloride in appearance, color, smell, taste, or dispenser. 98 healthy volunteers were assigned to one of two groups: brushing 3 times a day with flouride toothpaste and cetylpyridinium chloride powder, or brushing 3 times a day with flouride toothpaste and placebo. Before the test period, the subjects received through tooth cleaning and polishing. At basteline, GI, PI, BOP, and GCF of the Ramfjord teeth were measured in the experimental and placebo groups including 58 and 42 subjects repectively, After 4 weeks, GI, PI, BOP, GCF, compliance, irritation of the oral mucosa(redness, pus drainage, edema) and adverse reactions were measured. The PI, GI, and BOP of the experimental group recorded at baseline are 0.19${\pm}$0.19, 0.42${\pm}$0.31, and 0.08${\pm}$0.15. These scores showed significant decrease after 4 weeks of test period(0.11${\pm}$0.15, 0.22${\pm}$0.24, 0.02${\pm}$0.09 repectively at the end of the study) and inhibition of plaque accumulation and resolution of gingival inflammation could be observed. GCF shoed slight increase but this was not statistically different. Comparison of changes in measured scores of control and experimental groupshow GI, PI of the test indices have decreased. Test group showed significantly greater decrease in gingivitis and plaque accumulation after 4 weeks. GCF and BOP also showed greater decrease thant the control group but this difference was not statistically significant. At no time of the study period did any of the subjects show signs of irritation of the oral mucosa or adverse reactions. Following conclusions could be obtained from this study. The combined use of cetl powder and flouride toothpaste showed greater inhibition of plaque accumulation and greater decrease of gingivitis than use of flouride toothpaste with placebo agent.

• 대한화장품학회:학술대회논문집
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• 대한화장품학회 2003년도 IFSCC Conference Proceeding Book I
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• pp.765-779
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• 2003

Physiological lipid mixtures comprised of cholesterol, ceramide and free fatty acid better maintain epidermal homeostasis and have been recently used for dermatoses induced by skin barrier damage, for example for atopic dermatitis and xerotic skin. Itching and dry atopic dermatitis of the skin may be related to altered skin barrier function. In a previous study, the use of multi-lamellar emulsion (MLE), which is a lipid mixtures containing cholesterol, pseudoceramide and free fatty acid, has been shown to accelerate the recovery of the epidermal permeability barrier. In this study, we assessed the efficacy of MLE compared with a currently used anti-itch moisturizer (AIM), the active ingredients of which are menthol and camphor, on barrier recovery after barrier disruption. To clarify the effect of MLE and AIM after acute barrier perturbation, we measured the relation between transepidermal water loss (TEWL) and the barrier recovery rate at 3, 6, 24, and 48 hours after tape stripping hairless mice and then observed changes in the stratum corneum (SC), including the intercellular lipid structure and secretion of lamellar bodies, by electron microscopy. MLE treated skin recover skin barrier function more rapidly, and AIM treated skin delayed barrier repair. Morphological changes in the epidermis, of MLE treated skin revealed well-conserved lipid multi-lamellar structures at 24 h after tape stripping, whereas AIM treated skin showed altered lamellar bilayers within the SC interstices at 48 h. In addition, MLE treated skin showed an increase in the number of LBs and in their secretions and a decrease in the number of SC layers versus AIM treated skin. These results suggest that MLE may accelerate the production of an epidermal permeability barrier in hairless mice by increasing the number and secretion of LB and improve the dryness and itch associated with an altered epidermal permeability barrier.