Propylene Glycol과 glycerine의 열본해 특성

이재곤,이창국,백신,장희진,곽재진,이동욱,Lee Jae-Gon,Lee Chang-Gook,Baek Shin,Jang Hee-Jin,Kwag Jae-Jin,Lee Dong-Wook 한국연초학회 2005 한국연초학회지 Vol.27 No.1

This study was conducted to evaluate the characterization of the pyrolysis products of propylene glycol(PG) and glycerine alone and together with tobacco. The weight change of the samples during the pyrolysis was measured by a thermal analyzer(STD-2960). The pyrolysis products were determined by GC/MS after pyrolysis using a curie-point pyrolyzer(CPP, $220^{\circ}C,\;420^{\circ}C,\;650^{\circ}C,\;and\;920^{\circ}C$) and a double-shot pyrolyzer(DSP, $220^{\circ}C,\;420^{\circ}C,\;650^{\circ}C,\;and\;800^{\circ}C$), respectively. The pyrolysis products from tobacco with and without the addition of PG($2\%$) and glycerine($2\%$ were assayed for its pyrolytic behavior. The results showed that a dramatic change in weight of PG and glycerine was observed at $175^{\circ}C\;and\;249^{\circ}C$, respectively. PG and glycerine showed different patterns for their pyrolysis products according to the method of pyrolysis. Namely, the change rate in pyrolysis with DSP was much higher than that of CPP at above $650^{\circ}C$. The major pyrolysis products of PG were propene, acetaldehyde, propanal, and acetol; the major pyrolysis products of glycerine were 2-propenal, 2-propenol, acetol, and acetic acid. In the pyrolysis experiments of tobacco added PG and glycerine, the pyrolysis products of PG and glycerine weren't detected additionally, except for diethyleneglycol diacetate. From these results, it can be concluded that the PG and glycerine added to tobacco would not be expected to pyrolyse extensively during smoking.

향유와 꽃향유의 향기성분 조성 비교

이재곤,곽재진,임홍빈,정재훈,Lee Jae-Gon,Kwang Jae-Jin,Lim Heung-Bin,Jeong Jae-Hoon 한국연초학회 2004 한국연초학회지 Vol.26 No.2

This study was conducted to investigate the composition of flavor components of Elsholtzia ciliata and Eisholtzia splendens in order to obtain basic informations for the application of tobacco and food industry. Flavor components extracted were divided into three fractions ; essential oil, absolute and oleoresin from E. ciliata and E. splendens. Essential oil was extracted by simultaneous steam distillation(SDE), absolute and oleoresin were extracted by $100\%$ n-hexane and $50\%$ ethanol, respectively. Yields of the essential oil, absolute and oleoresin fractions from E. ciliata were $0.34\%,\;11.34\%\;and\;15.24\%,$ and those from E. splendends were $0.28\%,\;12.45\%\;and\;9.95\%$, respectively. The major components of essential oil of E. ciliata were naginata ketone$(29.37\%)$, elsholtzia ketone$(14.37\%)$ and rosefuran$(11.76\%)$. The major components of essential oil of E. splendens were 2-cyclohexen-1-one$(26.81\%)$, elsholtzia ketone$(13.46\%)$ and naginata ketone$(5.26\%).$ The composition of flavor components showed a slight difference between essential oils of E. ciliata and E. splendens. The major components of absolute fraction from E. ciliata were linoleic acid$(12.07\%),$ palmitic acid$(10.46\%)$ and 2-cyclohexene-1-one$(5.39\%).$ And those from E. splendens were linoleic acid$(12.38\%),$ palmitic acid$(9.47\%)$ and naginata ketone$(8.86\%).$ Ethyl linoleolate was a major component in oleoresin of E. ciliata and E. splendens.

열분해 조건에 의한 담배 성분과 첨가제의 열분해 특성

이재곤,장희진,곽재진,이동욱,이창국,Lee Jae Gon,Jang Hee Jin,Kwag Jae Jin,Lee Dong Wook,Lee Chang Gook 한국연초학회 2004 한국연초학회지 Vol.26 No.2

This study was conducted to evaluate the characterization of the pyrolysis products of tobacco constituents such as cellulose, lignin and tobacco additives. The pyrolysis condition was designed to simulate the pyrolysis/distillation zone$(200\~600^{\circ}C)$ and combustion zone$(700\~950^{\circ}C)$of burning com in the smoking cigarette. The pyrolysis products were determined by GC/MS after pyrolysis using Double-Shot pyrolyzer. In the case of cellulose and lignin, the number of pyrolysis product in the condition that simulate the pyrolysis/distillation zone was much more than the combustion zone simulating one. The major products of cellulose were levoglucosan, furfural, and 1, 6-anhydro-$\beta$-D-glucofuranose and that of lignin were phenol, 2-methoxy phenol, and 1, 2-dimethoxy benzene. In the case of tobacco additives such as 2, 6-dimethyl pyrazine, maltol, and piperonal, the pyrolysis products of these additives were evaporated from the pyrolyszer at least $96\%$ intactly. These results indicate that tobacco constituents such as cellulose and lignin were thermally degraded at the pyrolysis/distillation zone and thoroughly broke down at the combustion zone, but tobacco additives were intactly evaporated from burning com of smoking cigarette.

지부순례 - 인천지부

이재곤,Lee, Jae-Gon 한국화재보험협회 1985 防災와 保險 Vol.24 No.-

누락된 특수건물의 일소와 거수목표의 초과달성을 위해 인천지부에서는 관계기관의 협조를 얻어 수시로 신규물건 발굴작업을 전개, 84년들어 10월말까지 모두 1백 54건을 발굴하여 특수건물 대상으로 잡는등 거수증대에 최선을 다하고 있다.

원로과학기술자의 증언(24)-통신위성 발사하는 그날을 기대

이재곤,Lee, Jae-Gon 한국과학기술단체총연합회 1981 과학과 기술 Vol.14 No.12

"HEBEI SPIRIT"호 기름오염사고 방제조치현황

이재곤,Lee, Jae-Gon 한국해안해양공학회 2008 해안과 해양 Vol.1 No.2

수직제어방식에 의한 섬유기계의 운전에 관한 연구 제1보 On-off 제어방식에 의한 횡편기의 무늬내기 기구의 시작-

이재곤,우범식,이대훈,Lee, Jae-Gon,U, Beom-Sik,Lee, Dae-Hun 한국섬유공학회 1980 한국섬유공학회지 Vol.17 No.3

In order to investigate the method of pattern forming by the on-off control method in the v-bed flat knitting machine, the needle selection mechanism of the existing v-bed flat knitting machine was converted into newly contrived one which was controlled by the electronic logic circuit. The requirements of the electronic logic circuit and the pattern reading system of the v-bed flat knitting machine were examined. The operational results of the contrived needle selection mechanism by the electronic logic circuit and the pattern reading system showed that the newly contrived system was fully adaptable to the existing v-bed flat knitting machine.

평행 결합 Mushroom 구조를 이용한 대역 통과 여파기의 고조파 성분 억제

이재곤,이정해,Lee, Jae-Gon,Lee, Jeong-Hae 한국전자파학회 2007 한국전자파학회논문지 Vol.18 No.2

본 논문에서는 평행 결합 버섯 구조를 이용하여 대역 통과 필터의 고조파 성분을 제거하였다. Double positive(DPS)전송 선로인 마이크로스트립 라인과double negative(DNG)전송 선로인 버섯 구조 사이에서는 격리된 마이크로스트립 라인과 버섯 구조의 교차되는 분산 곡선 주파수 대역에서 강한 결합이 복소 전파 상수로 인해서 발생한다. 교차되는 분산 곡선 주파수에서 강한 결합으로 인하여 전파가 전파를 하지 못하기 때문에 이와 같은 구조는 대역 저지 필터로 이용할 수 있는 것이다. 제안된 대역 저지 필터는 공진기를 이용한 형태가 아니라 평행 결합 전송 선로를 이용하였기 때문에 넓은 대역폭을 가지고 DPS와 DNG 전송 선로 사이의 강한 결합으로 인해서 소형화에 유리하다는 장점을 가지고 있다. 본 논문에서는 중심 주파수 4 GHz, 3 dB fractional 대역폭은 40%인 평행 결합 대역 저지 필터를 설계하였고, 이를 두 가지 종류의 대역 통과 필터의 고조파 모드를 억제하는데 이용하였다. Harmonic band of bandpass filter(BPF) is suppressed using coupled mushroom structure. Between double positive (DPS) transmission line such as microstrip and double negative(DNG) transmission line such as one dimensional mushroom structure, strong coupling broadly arises in the cross range of dispersion curves of isolated microstrip and mushroom structure because of complex propagation constant in the cross range. Strong coupling inhibits wave propagation, so that this kind of structure can be utilized as bandstop filter(BSF). This BSF utilizes coupled transmission line instead of coupled resonator, resulting in broad bandwidth(>30 %), shan-rejection, and high rejection level. The strong coupling between DPS and DNG transmissionline makes it possible shorten coupling length, resulting in compact size. In this paper, parallel coupled BSF having center frequency of 4 GHz and 3 dB fractional bandwidth of 40 % is designed and utilized to suppressed spurious mode of two bandpass filters.

링 방적사의 기하학적 구조에 관한 연구

이재곤,강태진,박일규,Lee, Jae-Gon,Gang, Tae-Jin,Park, Il-Gyu 한국섬유공학회 1989 한국섬유공학회지 Vol.26 No.4

The geometrical parameters of spun yarn such as orientation angle, radial position of fiber and length of fiber were measured using the tracer fiber technique and correlations between them were investigated at five different numbers of twist of yarns, i.e., 420, 470, 570, 770, 970 tpm. Length of fiber(L) increased with the value of orientation angle($\theta$) of fiber. However, there were no correlation between length of fiber and radial position of fiber(r/R) as well as between orientation angle of fiber and radial position of fiber. Not only the orientation angle but also its relative frequency of fibers were measured using the tracer fiber technique. Their frequency curves were followed normal distribution and the shape of curves were shifted to higher orientation angle with number of twist of yarns. The mean value of orientation angle of fiber at each radial position showed an increase with the radial position of fiber. The initial tensile modulus of spun yarn determined experimentally showed lower value than theoretically determined for the yarns with low twist levels of 420, 470, 570 tpm. These results can be explained by the slippage between fibers.

민속-영덕 노물리 어로요

이재곤,Lee, Jae-Gon 한국어촌어항협회 2005 어항어장 Vol.73 No.-