• Korean Journal of Plant Resources
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• v.31 no.6
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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.

• Journal of Practical Agriculture & Fisheries Research
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• v.25 no.2
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• pp.30-35
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• 2023

Horse meat is a low-fat and high-protein food with more essential amino acids and less fat than other meat, but the horse meat has not been popularized in Korea due to stereotypes about horse meat. In this study, a comparative analysis of horse meat and beef was conducted using electronic nose device and gas chromatography, and as a result, there was no significant difference in the scent. However, the oleic acid content of beef is significantly higher than that of horse meat(p<0.05). Therefore, the possibility of popularizing horse meat processed products in the domestic meat processing market is expected to be sufficient.

• Food Engineering Progress
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• v.15 no.2
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• pp.162-168
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• 2011

In this study, discrimination of shred of frozen and dried Alaska pollack, shred of dried pollack and shred of cod using electronic nose based on mass spectrometer was carried out. Intensities of each fragment from shred of frozen and dried Alaska pollack by e-nose were completely different from those of dried pollack and cod. Each sample was analyzed, and discriminant function analysis was used for the discrimination of similar products. DFA plot indicated a significant separation of each shred of frozen and dried Alaska pollack, shred of dried pollack and shred of cod ($r^2$= 0.7787, F = 185.2). E-nose based on MS system could be used as an efficient method for discriminant of EMA foods.

• ETRI Journal
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• v.32 no.3
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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.

• Archives of Craniofacial Surgery
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• v.23 no.5
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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.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2018.10a
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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.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• v.18 no.3
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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.

• Korean journal of food and cookery science
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• v.22 no.3 s.93
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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.

• Culinary science and hospitality research
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• v.21 no.1
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• pp.235-249
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• 2015

This study was carried out to investigate the flavor changes of Lentinus edodes at different storage temperatures, time and natural additives using an electronic nose with six metal oxide sensors. To preserve good quality of modified atmosphere packaged Lentinus edodes, Four natural additives(Artemisia princeps, Artemisia capillaries, green tea, and activated charcoal) were used. The mushrooms were packaged in polyethylene films with each treatment and were stored at 5, 10 and $20^{\circ}C$. Increase in storage temperature and storage time decreased the ratio of resistance in the electronic nose as well as first principal component scores. In addition, indicating quality of mushroom reduced at high temperature and long storage time. The results of the electronic nose and the principal component analysis(PCA) in the mushrooms with Artemisia princeps and Artemisia capillaries that were stored at $5^{\circ}C$, and green tea and activated charcoal which were stored at $10^{\circ}C$ showed the good effects to maintain the freshness along with reducing off-flavor. However, there were no differences between control and treatment groups at $20^{\circ}C$.

• Proceeding of EDISON Challenge
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• 2016.11a
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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.