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- 저자 : 이장미(Jang mi Lee) (검색결과 8 건)
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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.
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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.
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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.
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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.
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