Currently, portable equipment for recycling of waste asphalt concrete (ASCON) has been used. However, any air pollution control devices are not attached in the simple portable one. Thus, a lot of air pollutants have been produced from recycling processes of waste ASCON which resulted from aging of paved roads or repavement of roads. This study deals with a preliminary result of concentration analysis of air pollutants obtained from a pilot and a real recycling processes of waste ASCON using simple portable recycling equipment. Air pollutants were taken from 4 steps of the pilot recycling process including an initial heating by liquid petroleum gas (LPG), intermediate heating and melting (H&M) process, final H&M process, and pavement processes using recycled ASCON at the recycling site. Also, air pollutants were taken front 4 steps of the real recycling processes including an initial H&M, final H&M and mixing, loading of recycled ASCON to dump trucks, and at the recycling site after leaving the loaded dump trucks for real pavement sites. The air pollutants measured in this study include volatile organic compounds (VOCs), aldehydes, particulate matter (PM: PM1, PM2.5, PM7, PM10, TSP (total suspended particulate)). The identified concentrations of VOCs increased with increasing time or degree for H&M of waste ASCON. In particular, very high concentrations of the VOCs at the status of complete melting, which is exposed to the air, of the waste ASCON just before paving tv the recycled ASCON at the recycling site. Also, considerable amount of VOCs were identified from the recycling equipment after the dump trucks leaded by recycled ASCON leaved the recycling site for the pavement sites. The relative level of formaldehyde exceeded 80% of the aldehydes Identified in the recycling processes. This is because the waste ASCON is exposed to direct flame of LPG during H&M processes. The PM concentrations measured in the winter recycling processes, such as the loading and rotation processes of waste ASCON into/in the recycling equipment for H&M, were much higher than those in the summer ones. In particular, the concentrations of coarse particles such as PM7 and PM10 during the winter recycling were very high as compared those during the summer one.

This study analyzed concentrations of volatile organic compounds (VOCs) produced from incineration of papers at 600 ℃. 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℃ providing air inside of the electric furnace and then they were oxidized for 80 minutes at 600℃ 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 GC-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, dichloromethane and chloroform were identified.

The new perilla variety Daesildeulkkae was developed at the National Crop Experiment Station, RDA in 1999 through the crossing between recommended varieties of Daeyeupdlkkae and Yeupsildlkkae in 1991. "Daesildeulkkae" is characterized as a thinner seedcoa

"Hyangimdeulkkae" was developed at the National Crop Experiment Station, RDA in 2000 through the crossing between lodging tolerant Andongdeulkkae and the hybrid line of high oil contented Keumreungdeulkkae and Jechundeulkkae in 1991. Seedcoat color of Hya

시료의 지방산 분석은 먼저 지방의 추출이 선행되어야 하는데 이때에는 시료량 및 시약이 많이 들고 또한 분석시간이 많이 소요되므로 지방 추출 및 지방산의 에스테르화를 한 단계에서 실시하는 One step extraction/methylation법(방법 1)에 따라 주요 유료작물의 지방산 조성을 살펴보았다 이 방법은 methanol-heptane-benzene-DMP-H2 SO4 혼합용매를 사용하여 지방 추출 및 지방산 에스테르화를 단일층에서 일어나게 한것으로 기존의 sodium methoxide를 촉매로 한 methanolysis 법에 의한 지방산 분석 결과와 유의적인 차이를 보이지 않았다. 또한 이 혼합시약으로 이미 추출된 지방을 대상으로 실험하였을 때에도(방법 2) 기존방법과 유의적인 차이가 없었다. 따라서 이 One step extraction/methylation법은 시료가 생체이든 추출된 지방이든 그 과정이 단순하고 시간과 노력이 훨씬 적게 소요되어 지방산 분석에 널리 이용될 수 있을 것이며, 특히 1회에 많은 시료를 처리하고자 할 때 더욱 분석효율이 높을 것으로 기대되었다

This study identified concentrations of air pollutants emitted from idling of vehicles such as cars, taxis, trucks, and buses. In this investigation we analyzed concentrations of SO2, NOx, CO, and CO2 emitted from exhaust pipe of vehicles as a function of vehicle type, mileage, exhaust volume, and fuel type using the GreenLine. Compact or light cars, which have relatively low exhaust volume, showed much higher exhaust concentrations of SO2, CO, and NOx than those emitted from vehicles with high exhaust volume. Vehicles using light oil showed much higher exhaust NOx concentrations than those of vehicles using gasoline. Vehicles using LPG and compact cars showed very high exhaust CO concentration compared to other vehicles. NOx exhaust concentrations were increased with increasing the mileage of vehicles.