• 한국자원식물학회지
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• 제31권6호
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• pp.641-651
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• 2018

Floral scents and metabolites from cut flowers of 14 peony cultivars (Paeonia lactiflora Pall.) were analyzed to discriminate different cultivars and to compare the Korean cultivar with the other cut peonies imported to Korea using electronic nose (E-nose) and Fourier transform infrared (FT-IR) spectroscopy combined with multivariate analysis, respectively. Principal component analysis (PCA) and discriminant function analysis (DFA) dendrogram of peony floral scents were not precisely same but there were 3 groups including same cultivars. PCA and partial least squares-discriminant analysis (PLS-DA) dendrograms of peony metabolites showed that different cut peony cultivars were clustered into two major groups including same cultivars. Fragrance pattern of Korean 'Taebaek' was classified to same group with 'Jubilee' on the PCA and DFA results and its metabolite pattern was clearly discriminated by the PCA and PLS-DA compared to the other cultivars. These results show that the 14 peony cut flowers could be discriminated corresponding to their chemical relationship and the metabolic profile of Korean 'Taebaek' has distinctive characteristics. Furthermore, we suggest that these results could be used as the preliminary data for breeding new cut peony cultivars and for improving the availability of Korean cut peony in cosmetic industry.

• 현장농수산연구지
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• 제25권2호
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• pp.30-35
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• 2023

본 연구에서는 E-nose 장비를 이용한 말고기와 소고기의 부위별 향기 특성을 확인하고, GC 분석을 통한 각 시료의 올레산 함량을 비교하여, 영양학적으로 높은 가치가 있으나 소비가 저조한 말고기 소비 시장에 대한 마육 가공식품의 대중화 가능성을 연구하였다. E-nose 분석 결과 말고기와 소고기의 향기의 종류에는 크게 차이가 없었다. 하지만, 부위별로 향기의 피크 최대치의 차이가 있어 향의 진하기에는 차이가 있는 것으로 나타났다. GC 분석 결과, 올레산 함량은 소고기가 높은 경향이었고, 말고기에서도 부위별로 유의한 차이가 있었다(p<0.05). 말의 부위별 차이에 대하여 향후 소와 말의 동일 부위별 지방산 비교 및 각 개체의 부위 간의 지방산 비교 연구가 필요하다. 본 연구 결과에서 소고기와 말고기의 육향은 차이가 없는 것으로 나타나, 비육마 가공식품은 소비자의 인식 변화 및 공급 유통망이 확보되면 제품 대중화가 가능할 것으로 판단된다.

• 산업식품공학
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• 제15권2호
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• pp.162-168
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• 2011

본 연구는 황태채, 북어채 및 대구채간의 차이를 MS-전자코를 이용하여 분석하였다. 이들 각 시료의 mass spectrum은 뚜렷한 차이를 보였으며 판별함수분석을 통해 휘발성 성분의 패턴을 분석한 결과 황태채와 북어채, 대구채가 구분되었다($r^2$= 0.7787, F = 185.2). 이러한 결과는 황태채, 북어채 및 대구채를 러시아산만을 선택하여 비교한 결과 그 차이가 더욱 뚜렷이 구분되었다. 결과적으로 전자코를 이용하여 유사 식품 간의 차이를 충분히 구분 가능하였으며 EMA 식품을 선별하는 데에도 도움이 될 것으로 기대된다.

• ETRI Journal
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• 제32권3호
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• pp.440-446
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• 2010

Array-based gas sensors now offer the potential of a robust analytical approach to odor measurement for medical use. We are developing a fast reliable method for detection of microbial infection by monitoring the headspace from the infected wound. In this paper, we present initial results obtained from wound-state monitoring for burn patients using an electronic nose incorporating an automated solid-phase microextraction (SPME) desorption system to enable the system to be used for clinical validation. SPME preconcentration is used for sampling of the headspace air and the response of the sensor module to variable concentrations of volatiles emitted from SPME fiber is evaluated. Gas chromatography-mass spectrometry studies prove that living bacteria, the typical infectious agents in clinical practice, can be distinguished from each other by means of a limited set of key volatile products. Principal component analysis results give the first indication that infected patients may be distinguished from uninfected patients. Microbial laboratory analysis using clinical samples verifies the performance of the system.

• 대한두개안면성형외과학회지
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• 제23권5호
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• pp.211-219
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• 2022

Background: Correction of secondary cleft nose deformity is one of the most important portions in the management of cleft lip patients. Various techniques have been introduced to achieve adequate shape, balance, and symmetry of anatomical landmarks. None of these methods can claim to universally solve all aspects of the problems encountered in secondary cleft deformity surgery. Some authors overlook the aspect of functional rehabilitation with regard to nasal respiratory pathway problems, which is present in over 90% of the patients. This study aimed to evaluate the aesthetic and functional improvements of the authors' non-destructive technique. Methods: With over 15 years of experience, open rhinoplasty was performed, which included total remodeling of the deformed lower lateral cartilage using several suture fixation techniques without any graft or implantation with septo-turbinoplasty. A total of 150 questionnaires were sent by e-mail, but 55 completed questionnaires were returned. Surgical outcomes were evaluated using questionnaire responses, and outcomes were divided into five categories each for esthetic and functional analyses. Results: The satisfaction rate ranged from 75 % to 98%, which means "more or less," "very much," and "absolutely yes" in the esthetic and functional viewpoints. Conclusion: The results of this study strongly recommend performing the suture fixation technique and functional rehabilitation simultaneously for cleft lip/nose correction.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2018년도 추계학술대회
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• pp.114-114
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• 2018

Among the various volatile organic compounds (VOCs) emitted by the plant, floral scent plays a key role in attracting pollinators for reproduction and mediates ecological interactions. Floral scent is an important trait and industry drives the competition for flowers with novel scents. Chrysanthemum is one of the well-known ornamental plants and is a popular cut flower across the world. Floral scent and the genes responsible for the floral scent emission are poorly studied in chrysanthemum. In the present study, floral scent and the expression pattern of floral scent genes were analyzed in two chrysanthemum cultivars 'Golden Egg' and 'Gaya Glory'. Initially, intensity of the floral scent in five developing stages of flower including 'budding (B), bud developing (BD), initial blooming (IB), almost open (AO) and open flower (OF)' was analyzed using electronic nose (E-nose) with six metal oxide sensors. Based on the distance analysis, different stages of flower showed different relative intensity of scent according to the sensory evaluation. Although the scent pattern differed by stage, scent intensity was strongest in the OF stage in the completely opened flower in both the cultivars. Further, expression pattern of six genes in the floral scent pathway including FDS, IDI, ISPH, TPS2, TPS5 and TPS6 was observed in all the five stages of the flower in both the cultivars. The expression pattern of all the six genes differed by stage and the terpene synthase genes TPS2, TPS5 and TPS6 showed good expression levels in the $5^{th}$ flower stage compared to other stages. This study provides a preliminary data for understanding the regulation of floral scent in chrysanthemum.

• 한방안이비인후피부과학회지
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• 제18권3호
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• pp.55-65
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• 2005

Objectives: Allergic rhinitis is an inflammation or irritation of the mucous membranes that line the nose. Common symptoms include sneezing; a stuffy or runny nose; itchy eyes, nose and throat; and watery eyes. We aimed to determine therapeutic effects of Gudambope-tang by observing changes in blood cells and the nasal mucosal tissue. Methods: Fifteen Spraque-Dawley rats were divided into three groups: normal, control, and sample group. Allergic rhinitis was induced in the control and sample group by intraperitoneal and intranasal sensitization with 0.1% ovalbumin solution. Then Gudambope-tang was orally administered only to the sample group for 28days, while the rats in the control group was given normal saline. We observed changes in the number of RBC and WBC; changes of neutrophil, Iymphocyte and monocyte proportions; total IgE level and AST & ALT changes; also, changes in the nasal mucosal tissue. We used ANOVA test statistically(p<0.05). Results: 1. Gudambope-tang showed an inhibitory effect on the process of allergic rhinitis. 2. Gudambope-tang inhibited the inflammatory reaction on the nasal mucosal tissue. 3. Gudambope-tang had no hepatoxicity. Conclusions: According to the above results. it is considered that Gudambope-tang has an inhibitory effect on the process of allergic rhinitis and it can be used in relieving symptoms of allergic rhinitis.

• 한국식품조리과학회지
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• 제22권3호통권93호
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• pp.299-306
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• 2006

The numerous varieties of coffee beans contain a wide range prices and qualities. While the varieties of green coffee beans can generally be distinguished by their appearance, this visual criterion is impossible after the roasting process. Therefore, we need to develop a classification method or device. In this study, the potential of a new type of electronic nose, fast gas chromatography based on a surface acoustic wave sensor(SAW), was evaluated for the classification of origins and blended commercial brands in roasted coffee beans. Eight blended commercial brands and the origins of four similarly roasted ground coffee beans(with no significant difference of color) were rapidly(90 sec/sample) classified. The reproductive results were easily understandable over the aroma image pattern by $VaporPrint^{TM}$. In conclusion, GC-SAW electronic nose can be applied to the classification of origins and commercial brands in roasted ground coffee beans and to e evaluation of the similarities and differences of volatile pattern between samples.

• 한국조리학회지
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• 제21권1호
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• pp.235-249
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• 2015

저장시간과 저장온도 및 천연첨가제를 달리하여 저장한 표고버섯의 향 변화를 6개의 metal oxide 센서가 장착된 전자코를 이용하여 분석하였다. MA 포장을 한 표고버섯의 품질을 유지하기 위하여 쑥, 약쑥, 녹차와 활성탄의 네 가지 천연첨가제를 사용하였다. 표고버섯은 각 처리구마다 폴리에틸렌 필름으로 포장하였고 5, 10, $20^{\circ}C$에서 저장하였다. 저장온도와 시간이 증가할수록 전자코의 저항비율값과 제1주성분 값이 감소하였는데, 이것은 높은 온도와 저장시간이 길수록 버섯의 품질이 낮아짐을 나타낸다. 표고버섯을 전자코와 주성분 분석(PCA)을 한 결과, 쑥 처리구(B)와 인진쑥 처리구(C)는 $5^{\circ}C$에서, 녹차 처리구(D)와 활성탄 처리구(E)는 $10^{\circ}C$에서 저장할 때 이취발생을 줄이고 선도를 유지하는 효과를 보여주었다. 그러나 $20^{\circ}C$에서는 대조구(A)와 처리구 간의 차이는 없었다.

• EDISON SW 활용 경진대회 논문집
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• 제6회(2016년)
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• pp.78-80
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• 2016

우주발사체와 항공 분야에서 초음속과 극초음속 영역에서 비행체의 항력을 최소화하기 위한 최적 형상설계 연구가 활발히 진행되고 있다. 본 논문에서는 마하수 2의 초음속 영역에서 대표적인 비행체 선두부 형상 3가지에 대한 수치해석을 eMEGA 프로그램을 활용해 격자를 생성하고 eDAVA 프로그램을 활용해 유동 해석을 수행하였다. 그 결과 자유유동 마하수 2의 초음속 영역에서는 선두부 형상이 뾰족한 Cone 형상이 3가지 형상 중 작용하는 항력이 가장 적게 나타났고, 선두부가 무딘 형상이 극초음속 영역에서 가장 적합한 현상과 다르게 나타났다.