추출방법에 따른 잎담배 종류별 휘발성 향기성분 특성비교

이장미,이정민,이창국,복진영,황건중,Lee, Jang-Mi,Lee, Jeong-Min,Lee, Chang-Gook,Bock, Jin-Young,Hwang, Keon-Joong 한국연초학회 2010 한국연초학회지 Vol.32 No.2

Traditional simultaneous distillation extraction(SDE) and solid-phase micro extraction(SPME) methods using GC/MS were compared for their effectiveness in the extraction of volatile flavor compounds from different tobacco leaves types(flue-cured, burley, oriental). The major volatile flavor compounds of flue-cured and burley tobacco were similar such as neophytadiene, solanone, megastigmatrienone isomers, ${\beta}$-damascenone and ${\beta}$-ionone. On the other hand, volatile flavor compounds such as norambreinolide, sclareolide were specifically identified in oriental tobacco. Each method was used to evaluate the responses of some analytes from real samples and standards in order to provide sensitivity comparisons between two techniques. Among three types of SPME fibers such as PDMS(Polydimethylsiloxane), PA(Polyacrylate) and PDMS/DVB (Polydimethylsiloxane/Divinylbenzene) which were investigated to determine the selectivity and adsorption efficiency, PDMS/DVB fiber was selected for the extractions of the volatile flavor compounds due to its effectiveness. The qualitative analysis showed that the total amount of volatile flavor compounds in SDE method(130 species) was much more than that in SPME method(85 species). SPME method was more efficient for all the highly volatile compounds than SDE method, but on the other hand, low-volatile compounds such as fatty acids or high-molecular hydrocabons were detected in SDE method. SPME method based on a short-time sampling can be adjusted to favor a selected group compounds in tobacco. Furthermore this results could be used to estimate the aroma characteristics of cigarette blending by using a different type of tobacco with more effectiveness and convenience.

인류의 안전한 미래가 내 손에 ···

이장미,Lee, Jang-Mi 한국과학기술단체총연합회 2005 과학과 기술 Vol.38 No.1

당귀 열수 추출물을 이용한 막걸리의 품질 특성

이장미(Jang Mi Lee),이하나(Ha Na Lee),장윤희(Yun Hee Chang) 동아시아식생활학회 2013 동아시아식생활학회지 Vol.23 No.3

The aim of this study was to investigate the quality characteristics of makgeolli that was produced by using different percentages (control, 3%, 5%, 7%, 9% by rice weight) of Angelica gigas Nakai water extracts during fermentation at 25℃ for 7 days. Yeast cell count in makgeolli steadily increased and showed the highest value at day 4 of fermentation, since then, the count decreased consistently. The final alcohol contents were higher than 15% in all samples. Soluble contents and antioxidation activity were significantly increased in percentage as Angelica water extracts increased (p<0.05). As the amount of Angelica water extracts increased, total polyphenol contents increased as well. Soluble contents and total polyphenol contents were increased according to the fermentation period. Total acidity increased up to day 3, but slowly decreased afterwards. However, the pH rapidly decreased by day 3, but then increased steadily. Reducing sugar amount was increased sharply by day 2 of fermentation and then, diminished gradually. Hunters color value was not significantly different among samples however, they were significantly different between day 2 samples of fermentation and day 3 or more samples (p<0.05). In sensory evaluations, the sample produced using 5% Angelica water extracts received the highest score in herbal flavor, herbal taste, sourness, sweetness, and overall acceptance. Makgeolli using Angelica gigas Nakai water extracts showed excellent characteristics in antioxidative activity and higher total polyphenol content. Makgeolli produced using 5% Angelica water extracts received the highest score in sensory evaluation. Therefore, makgeolli produced using 5% Angelica water extracts was considered to be the most suitable for manufacturing makgeolli.

유아 교사의 생태유아교육 인식 및 실행에 관한 연구

이장미 ( Lee Jang-mi ) 동국대학교 교육연구소 2017 교육연구 Vol.2 No.1

본 연구의 목적은 유아교사가 생태유아교육에 대해 어느 정도 인식하고 있으며, 생태유아교육을 어느 정도 실행하고 있는지, 그리고 유아교사들의 생태유아교육 인식도 수준에 따라 생태유아교육 프로그램의 실행도에서 차이가 나타나는지를 규명해보고자 하는 것이었다. 연구대상은 임의표집으로 선정된 U시 소재 유아교 육기관들에 재직 중인 유아교사 249명이었다. 생태유아교육에 대한 유아교사의 인 식도와 실행도를 측정하기 위한 설문지가 선행연구를 바탕으로 재구성되었다. 수집된 자료는 SPSS 18.0 프로그램을 이용하여 빈도분석, 신뢰도 분석, 기술통계분석, t-test, 일원변량분석(ANOVA)이 실행되었다. 연구 결과, 교사들이 응답한 교육 현장에서의 생태유아교육 실행도는 `보통이다` 보다 다소 높은 수준으로 나타났다. 유아교사의 일반적 배경 중 근무기관 유형, 교사 연령, 생태유아교육 관련 연수경험 여부에 따른 생태유아교육 실행도의 차이가 있었다. 유아교사의 생태유아교육 인식도 수준에 따라 전체 프로그램 및 모든 하위영역 프로그램들에서 각각 유의한 차이가 있었다. The purpose of this study was to examine the early childhood teacher`s perception and practice about eco-early childhood education. The subjects of this study were 249 teachers who worked in kindergartens and day-care centers in U-si and G-si of Gyeionsangbook-Do. All teachers responded their perceptions and levels of practice about eco-early childhood education at the questionnaires individually. For data analyis, reliability test, frequency test, descriptive ananlysis, correlation t-test, and one-way ANOVA were conducted using Spss/win program 18.0. The major results of this study were as follows. First, teachers` mean scores of perception about eco-early childhood education appeared to slightly over the average. And there were significances of teachers` perceptions about eco-early childhood education. according to their age, teacher training education. Second, teachers` mean scores of levels of practices about eco-early childhood education in the field appeared to slightly over the average. And there were significant differences of teachers` practices in the fields about eco-early childhood education. according to types of education institutes that they work for, teacher age, teacher training education. Third, there were significant differences of teachers` practices in the fields about eco-early childhood education according to levels of teachers` perceptions about eco-early childhood. In conclusion, it is necessary to support developing teachers`s levels of perceptions about eco-early childhood education for the practices of eco-early education at the educational institutes for young children.

흡연자의 궐련연기 흡입량 평가방법으로서의 궐련 필터 분석

김효근,이장미,박철훈,황건중,Kim, Hyo-Keun,Lee, Jang-Mi,Park, Chul-Hoon,Hwang, Keon-Joong 한국연초학회 2009 한국연초학회지 Vol.31 No.1

잎담배 중 neutral volatile flavor 화합물 분석

이정민,이장미,장기철,김효근,황건중,Lee, Jeong-Min,Lee, Jang-Mi,Jang, Gi-Chul,Kim, Hyo-Keun,Hwang, Keon-Joong 한국연초학회 2009 한국연초학회지 Vol.31 No.2

This work has been conducted to develop a method for the analysis of neutral volatile flavors and their precursors in tobacco. The neutral volatile compounds and precursors in tobaccos have been investigated by Neutral Volatile scan method(NV scan) using Soxhlet extractor. The method has been used to analyze a range of different tobaccos and tobacco products. Neutral flavor compounds were classified as three sections(1st Volatile Fraction, Breakdown Flavor Products and Cembranoid Precursors). The major components of the First Volatile Fraction were 2-cyclohexene-1-one, 6-methyl-5-hepten-2-one, limonene and phenyl ethanol. The major components of Breakdown Flavor Products were isophorone, solanone, damascenone, 3-hydroxy-$\beta$-damascone, geranyl acetone, $\beta$-ionone, dihydroactinidiolide, norsolanadione, neophytadiene, hexahydrofarnesylacetone, farnesyl acetone and megastigmatrienone. The major cembranoid precursor compounds were dibutyl phthalate, duvatrenediols, 8,12-epoxy-14-labden-13-ol, 11-hydroperoxy-2,7,12(20)-cembratriene-4,6-diol, 12,15-epoxy-12,14-labadien-8-ol, 2,7,11-cembratrien-4,6-diol and 8,13-epoxy-14-labdien-12-ol. The NV scna results of tobacco types(flue-cured, burley and oriental) showed that each tobacco type has a characteristic flavor component profile.

크랜베리를 첨가한 막걸리의 품질 특성

이하나(Ha-Na Lee),이장미(Jang-Mi Lee),장윤희(Yun-Hee Chang) 동아시아식생활학회 2013 동아시아식생활학회지 Vol.23 No.1

Korean traditional rice wine, Makgeolli, has been widely consumed and increasingly popular in Korea. In this study, we examined Makgeolli supplemented with cranberries (0, 5, 10 and 15% by rice weight) during fermentation for seven days for the various quality characteristics : pH, total acidity, soluble contents, color, reducing sugars, alcohol contents, and DPPH free radical scavenging activities, total flavonoids, microbial properties, and sensory properties. After the pH value decreased from a range of 4.40~5.63 to 3.83~3.94 up to day 3, the pH gradually increased until day 7. As fermentation proceeded, soluble contents and reducing sugar increased in most of the samples, with a temporary reduction after day 2. There were no differences in L and b color values, but the “a” value showed significant differences with the rate of cranberry added. The DPPH free radical scavenging activity and total flavonoid content of cranberry Makgeolli were higher than those of the control. After fermentation for seven days, the alcohol content ranged from 14.57 to 17.40%, while total acidity levels were within the range of 0.50 to 0.54%. Yeast cell counts increased until day 3 and then, gradually deceased. In the sensory evaluation, Makgeolli with 10% cranberry showed the highest overall acceptance.

이중층 몰리브데늄을 후면전극으로 적용한 비진공법 CuInSe₂ 태양전지의 특성

황지섭(Ji Sub Hwang),윤희선(Hee-Sun Yun),장윤희(Yoon Hee Jang),이장미(Jang mi Lee),이도권(Doh-Kwon Lee) 한국태양광발전학회 2020 Current Photovoltaic Research Vol.8 No.2

Molybdenum (Mo) thin films are widely used as back contact in copper indium diselenide (CISe) solar cells. However, despite this, there are only few published studies on the properties of Mo and characteristics of CISe solar cells formed on such Mo substrates. In this studies, we investigated the properties of sputter deposited Mo bilayer, and fabricated non-vacuum CISe solar cells using bilayer Mo substrates. The changes in surface morphology and electrical resistivity were traced by varying the gas pressure during deposition of the bottom Mo layer. In porous surface structure, it was confirmed that the electrical resistivity of Mo bilayer was increased as the amount of oxygen bonded to the Mo atoms increased. The resulting solar cell characteristics vary as the bottom Mo layer deposition pressure, and the maximum solar cell efficiency was achieved when the bottom layer was deposited at 7 mTorr with a thickness of 100 nm and the top layer deposited at 3 mTorr with a thickness of 400 nm.