• Proceedings of the Korea Air Pollution Research Association Conference
• /
• 2003.05b
• /
• pp.403-404
• /
• 2003

현재까지 개발되고있는 휘발성유기화합물질의 처리기술들로는 소각, 흡착, 산화, 그리고 생물학적 처리 등이 있다. 그러나 이러한 기술은 각기 나름대로의 장점과 단점들, 그리고 적용의 한계성을 가지고 있으며, 아직도 많은 극복해야될 문제점을 가지고 있어서 여전히 연구개발 진행중에 있다. 지금까지 대형 배출원에서 일부 응용되고 있거나 처리시설로 가장 활발히 검토되고 있는 제어기술은 활성탄 흡착을 이용한 흡착처리기술이다. 그러나 실제로 흡착을 이용하여 휘발성유기화합물을 처리하고 있는 많은 업체에서 흡착시설 또는 흡착탑을 효율적으로 이용하지 못하고 있다. (중략)

• Proceedings of the Korea Air Pollution Research Association Conference
• /
• 2002.04a
• /
• pp.179-180
• /
• 2002

사회가 고도록 발달하면서 사람들의 생활공간은 대부분 사무실이나 가정에서 보내는 시간이 하루의 80-90% 이상을 차지하고 있다. 대부분의 시간을 특정공간에서 보내게 되므로 건강과 편리함을 위해 설치되고 있는 가구나 카펫, 그리고 기타 다양한 제품에서 방출되는 휘발성 유기화합물에 대한 관심이 증가하고 있다. 한 예로, 미국 소비자 생산품 안전 위원회 (U.S. Consumer Product Safety Commission, CPSC)는 1988년부터 1990년 초까지 206가구에서 335명의 주민들로부터 새로 설치된 카펫에서 방출되는 다양한 화학물질로 인한 여러 가지 고통을 접수하였다. (중략)

• Proceedings of the Korea Air Pollution Research Association Conference
• /
• 2002.11a
• /
• pp.214-215
• /
• 2002

실내공기 질 저하 요인중의 하나인 카페트에서 방출되는 휘발성 유기화합물(이하VOCs)이 실험적으로 측정되어, 카페트의 VOCs 방출과정이 모델링 되었다. 실험으로 측정된 데이터는 실험 범위 내에서만 유효한 값을 가지며, 세부적이며 국소적인 값은 파악되기가 어렵다. 따라서 이러한 실험의 한계가 극복되는 동시에 실험결과가 수학적으로 응용되기 위해서는 물리적 현상에 기반을 둔 모델링이 요구된다. (중략)

• Journal of Environmental Science International
• /
• v.11 no.10
• /
• pp.1109-1116
• /
• 2002

This study analyzed concentrations of volatile organic compounds (VOCs) produced from incineration of papers at $600^{\circ}C$. The papers used in this study included A4 papers (new, printed with ink-jet, printed with carbon), newspapers (printed with bean oil, printed with a general newspaper ink), packaging box, document envelope, single-use paper cup, and cosmetic tissue. Papers were heated from room temperature upto $600^{\circ}C$ providing air inside of the electric furnace and then they were oxidized for 80 minutes at $600^{\circ}C$ maintaining the same air supply. VOCs emitted from the incineration process were sampled using an air sampling pump and bags for 160 minutes and then the components and concentrations of the VOCs were analyzed by a CC-MS. The most prominent chemical structure of the Vous identified from incineration of the papers was furans and then furans were followed by aromatics and aliphatic alkenes. About 40% of the identified VOCs contained double bonds, which have relatively a high ozone (ground level) formation potential, within their molecular structure. Also, some cancer suspecting compounds like benzene, dichlorormethane and chloroform were identified.

• Korean Journal of Food Science and Technology
• /
• v.29 no.1
• /
• pp.15-20
• /
• 1997

Changes in antioxidative substances-sesamol, sesamin and sesamolin - and mineral contents of sesame oil during refining processes have been studied to investigate the oxidative stability of oils during the storage at $70^{\circ}C$. Fe, Cu, Mg and Zn were nearly removed from the oil by the degumming process. During storage, the changes of total volatile contents in crude and degummed sesame oil were not noticeable but those in alkali-refined and deodorized sesame oil were increased at early period of the storage. The increases of hexanal and pentanal were most noticeable and their concentration was increased markedly in alkali-refined, bleached and deodorized sesame oil at early period of the storage. During refining processes and storage, sesamin was relatively stable but the content of sesamolin was decreased. The content of sesamol was decreased until alkali-refining process but increased during a bleaching process. The content of sesamolin tended to decrease with increasing of sesamol during storage.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.33 no.5
• /
• pp.917-920
• /
• 2004

The migration potential of volatile organic solvents widely employed in the printing process of food packaging was investigated by using a closed experimental system, which contained a food sample and a paper sheet spiked with the contaminant solvents. The studied organic compounds included toluene and p,m,o-xylene which are relatively highly volatile. Typical food samples of caramel, beef jerky and butter were selected based on their chemical composition and were assigned to the migration system at 10, 25 and 4$0^{\circ}C$. The equilibrated migration level was very high with almost complete transfer in the butter with high fat, while caramel of high carbohydrate content and beef jerky of high protein showed migration degree of 37∼56% and 37∼77%, respectively. Temperature did significantly influence the migration on beef jerky with higher level at higher temperature. There was no difference in the migration level among the solvents.

• Journal of Energy Engineering
• /
• v.9 no.4
• /
• pp.319-327
• /
• 2000

산업분야의 여러공정에서 배출되는 휘발성 유기화합물은 1차적인 작업자에 대한 유해성뿐만이 아니라 대기중에 배출시의 제 2차 오염물질의 생성 때문에 최근 들어 이러한 물질의 처리에 큰 관심이 집중되고 있다. 본 연구에서는 휘발성 유기화합물로서 프로판을 사용하여 이러한 초 희박 혼합기의 제거를 위해 재생열산화법이 제안되었다. 실험장치에는 중앙에 연소실과 전기적 열량공급장치를 장착하였다. 초 희박 혼합기의 연소실에서의 산화과정과 열사화 장치의 폐열회수 특성을 연구하기 위하여 혼합기의 농도, 유속 및 연소실 최대온도와 같은 다양한 작동조건을 고려하였다. 그 결과. 재생열산화장치가 초 희박 혼합기의 산화에 적절하게 사용될 수 있음을 알았으며 최대 96%의 제거효율 얻을 수 있었다. 산화과정중에 발생하여 배출되는 CO는 운전조건을 변화시킴으로써 그 농도를 낮출 수 있었으며 열적 NOx는 배출되지 않았다. 페열회수효율은 전 운전영역에서 높게 나타났으며 그 값이 최대 98%에 이르렀다.

• 한국생물공학회:학술대회논문집
• /
• 2000.11a
• /
• pp.634-637
• /
• 2000

The productivity of natural flavors in alfalfa suspension cultures is low partially due to their low solubility. Thus, by formation inclusion complex of cyclodextrin(CD) with flavor compounds enhancement of the productivity of flavor was attempted in this research. we observed that CD formed inclusion complex with flavor compounds by GC/MS analysis. Also, there was indication that CD played a role as an elicitor in alfalfa suspension cultures.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.41 no.8
• /
• pp.1057-1065
• /
• 2012

The effects of volatile flavor extracts of eight different herbal medicines, Juniperus rigida (JR), Saussurea lappa SL), Cnidium officinale (CO), Angelica gigas (AG), Eugenia caryophyllata (EC), Angelica tenuissima (AT), Mentha arvense (MA), and Artemisiae argyi (AA), were investigated on LPS-stimulated inflammation using Raw 264.7 cells. The volatile flavor extracts of CO and AG considerably inhibited LPS-stimulated NO, $PGE_2$, IL-6, and TNF-${\alpha}$ (except AG) production, as well as iNOS expression. Major volatile components of CO were identified as ligustilide and of ${\beta}$-eudesmol as AG by GC-MS analysis. Thus, these results suggest that the volatile extracts of CO and AG may be useful as potential therapeutic agents for inflammation-associated disorders.

• Proceedings of the Korean Environmental Sciences Society Conference
• /
• 2004.05a
• /
• pp.237-239
• /
• 2004