This study was to investigate the runoff characteristics of non-point pollutants source at the urban area in Suwon city. The highest T-N and T-P concentration of rainfall runoff observed in agricultural area. In residential area, the highest BOD5 and SS concentration of rainfall runoff was investigated. During rainfall events, the peak concentrations of SS and BOD5 were observed after 1~2 hours of rainfall in urban area. Whereas, the peak concentrations occurred within 1~2 hours after rainfall and then the highest concentrations of SS and BOD5 sharply decreased, showing strong first flush effect in urban area. The EMC results indicated that the highest value of T-N and T-P in agricultural area was observed. While residential area was shown the lowest EMC value as T-N and T-P. Non-point pollutant loads on the land use types in urban area were investigated in the order of residential>industrial>agricultural>highway. BOD5 and SS loads on urban watershed were investigated in the order of Suwon>Hwangguji>Seoho>Wonchunri. Whereas, T-N and T-P loads on urban watershed were investigated in the order of Hwangguji>Suwon>Wonchunri>Seho.

A mass balance of process was calculated by using the analysis of basic unit and environmental assessment of all the processes of Busan fashion color industry cooperative that operates a combined heat and power plant and a bio treatment plant. The mass balance for the combined heat and power plant was done, based on boiler and water treatment processes while each unit reactor was used for the bio treatment plant. From the results above, a resource recycle network, a treatment flowchart for food waste water/wastewater treatment and a carbon reduction program were established.

본 연구는 바이러스 무병묘의 대량 증식을 위한 기초 자료를 얻고자 포도 '자랑' 품종의 신초와 뿌리의 형성 및 생장에 미치는 배지조성물질과 생장조절제의 영향을 구명하고자 수행되었다. 배지의 무기염 농도가 낮을수록 신초의 형성은 많아지는 경향으로, 특히 1/2MS배지에서 신초의 형성 및 생장이 가장 양호하였다. 부정근의 형성은 무기염의 농도가 높아질수록 양호하여 2MS배지에서 부정근의 수가 2.1개로 가장 많았다. Sucrose의 경우, 신초의 형성은 1%, 부정근의 형성은 3%, 생장은 1% 농도구에서 가장 좋았다. 활성탄의 0.05% 첨가에 의해 신초의 생장은 양호했으며, 특히, 부정근의 형성 및 생장에 효과적이었다. '자랑'의 대량 증식을 위한 배지의 pH는 6.8이 가장 적합하여 신초의 마디수와 길이가 각각 3.9개와 1.3 cm로 가장 좋았다. 기내 대량증식에 미치는 생장조절제의 영향으로 BA 1.0 mg/L에서 신초의 생장이 가장 왕성하였으며, NAA 1.0 mg/L에서 절편체당 16.9개의 신초가 형성되어 양호한 결과를 얻었다.

Linear type SFL (spent fluorescent lamp) can be classified by 3-banded lamp and general lamp. Linear type SFL is separated by the end-cutting technique to examine the distribution of mercury in the major components such as base cap, glass part and phosphor powder. In this study, the concentration of mercury is analyzed by DMA (Direct Mercury Analysis) method for major components in linear type SFL. From the results of mercury distribution for 3 companies, the concentration of mercury in 3-banded lamp is less than that in general lamp. And phosphor powder has greater than 80% of total mercury amount in SFL and the mercury concentration in phosphor powder is measured between 1,250 ppm and 1,740 ppm. The mercury concentration in phosphor powder can be changed by the type of lamp, company, and period of usage. KET and TCLP are carried out for phosphor powder, glass, and base cap to estimate the hazardous characteristic. From the results of KET and TCLP test for general lamp and 3-banded lamp, phosphor powder from general lamp and 3-banded lamp should be controlled separately by stabilization or other methods to reuse as a renewable material because the phosphor powder is determined as a hazardous waste.

Thermal processing of (+)-catechin was carried out at 121℃ for different reaction times (1, 2, 3, 6, and 12 h). The reacted products, compounds (1) and (2), were isolated and quantified via HPLC analysis. The antioxidant properties of processed (+)-catechin and its isolated compounds for different reaction time was measured via radical scavenging assays using DPPH and ABTS+ radicals. Additionally, the anti-obesity efficacy of the thermal treated (+)-catechin was evaluated via porcine pancreatic lipase assay. The reacted (+)-catechin for 3 h had a slightly higher antioxidant capacity than that the parent (+)-catechin. Products 1 and 2, which were isolated from the reacted mixture during 3 h, showed an antioxidant capacity, and these two compounds may be responsible for the antioxidant capacity of processed (+)-catechin. Simple thermal treatment of (+)-catechin can be used to produce (+)-epicatechin (1) and protocatechuic acid (2) with enhanced antioxidant and anti-adipogenic effects.

본 연구는 산마늘추출물이 과산화지질을 급여한 비만쥐의 지질강하, 항산화효과 및 염증매개물질의 생산에 미치는 영향을 검토했다. 그 결과 혈장 FFA, TG, total cholesterol 및 LDL-cholesterol 농도는 산마늘추출물 처리군 들에서 감소했으며, 혈장HDL-cholesterol 농도는 산마늘추출물 처리군 들에서 증가했다. 간장 내 total cholesterol 농도 및 TG 농도는 산마늘추출물 처리군 들에서 감소하는 경향을 나타내었다. 혈장 및 간장의 TBARS 농도는 산마늘추출물 처리군 모두가 대조군보다 낮은 경향을 보였다. 간장 GSH-Px, SOD 및 CAT활성치모두가 산마늘추출물 처리군 들에서 증가하는 경향을 보였다. 혈장 NO, Ceruloplasmin 및 α1-acid glycoprotein 농도는 산마늘추출물 투여군 들이 대조군보다 낮은 경향을 나타내었다. 이와 같은 결과는 산마늘추출물에 지질강하, 항산화 및 항염증작용에 효과를 나타내는 기능성물질이 내재하고 있음을 시사한다.

A new system to ensure fire resistance of high strength concrete column in high-rise building with an permanent formwork made of insulation materials has been being studied. In this study, the fire resistance performance of the permanent formwork to the mixture of materials was estimated

This paper presents the actual recycling rates and recycling processes of waste plastic recycling facilities using material flow analysis. Determination of actual recycling rates through the processes of waste plastics is a very important subject not only from the point of plastic recycling efficiency energy conversion but also from the perspective of the recycling technology level. In this study, the recycling processes and recycling rates of waste plastic recycling facilities were evaluated by the MFA analysis based on 14 site visits and 25 questionnaires. The MFA methodology based on mass balance approach applied to identify the inputs and outputs of recyclable plastic materials in the recycling processes at recycling facilities. It is necessary to determine the composition and flows of the input materials to be recycled in a recycling facility. A complete understanding of the waste flows in the processes along with the site visit and data surveys for the recycling facilities was required to develop a material flow for the processes and determine the actual recycling rate. The results show that the average actual recycling rates for the recycling facilities by the site visit and the questionnaire was found to be approximately 87.5 ± 7.1% and 84.3 ± 14.5%, respectively. The recycling rates depended upon several factors including the quality of incoming waste plastics, the type and operating conditions of recycling processes, and the type of final products. According to the national statistics, the recycling rate of waste plastics was about 53.7%, while the actual recycling rate at national level was estimated to be approximately 45.1% by considering the recycling performance evaluated as well as the type of recycling process applied. The results of MFA for the recycling processes served as a tool to evaluate the performance of recycling efficiency with regard to the composition of the products during recycling. They may also support the development of the strategy of improvement of recycling processes to maximize resource recovery out of the waste plastic materials.

Dry matter allocation characteristics of Calystegia soldanella, grown in pots, was analysed to assess its plasticity in response to water-stressed conditions. As water was withheld leaf water potential between the two watering treatments was similar during the first 6 days, followed by a rapid decrease in water-stressed plants. The minimum leaf water potential was -1.50 MPa on day 15 and the maximum leaf water potential was about -0.5 MPa on day 0 in water-stressed plants. In well-watered plants leaf water potential was maintained almost consistently throughout the experiment. There was no significant difference in plant dry weight between the two watering treatments for 9 days after the start of experiment and that was remarkably increased thereafter, compared with that remained without any increase in water-stressed plants. In dry mass partitioning, however, the water-stressed plants showed a great plasticity, showing that there were 1.81, 1.35 and 0.81 times increase in root, stem and leaf, respectively. Dry mass partitioning in well-watered plants varied from 2% to 5%. The difference of dry mass partitioning between the two watering treatments was reflected in leaf mass per unit area (LMA) and root/shoot (R/S) ratio. LMA in water-stressed plants was lower than that in well-watered plants, while R/S ratio in water-stressed plants was higher in well-watered plants. This means that the water-stressed plants reduced its leaf area and increased dry mass partitioning into root and stem during the progress of soil drying. These results indicate that Calystegia soldanella inhabiting in sand dune cope with water stress with high plasticity which can adjust its dry mass partitioning according to soil water conditions.

고 에너지 방사선의 이용과 치료 계획의 발전이 이루어지면서 치료방사선에서 선량 측정의 중요성은 더욱 부각되고 있다. 이러한 선량 측정을 위한 검출기에는 이온 전리함, 필름, 열형광선량계, 다이오드 등이 있다. 이중, 다이오드 검출기는 입사되는 방사선에 의하여 전기적인 신호를 생성하는 광도전체 물질을 사용하는데, 이러한 광도전체 물질에 대해서 최근 많은 연구 그룹들이 관심을 가지고 있다. 하지만, 방사선 치료 영역에서만은 실리콘(Si) 이외에 물질에 대한 연구 결과가 활발히 도출되고 있지 않은 실정이다. 본 논문에서는 광도전체 물질의 고 에너지 방사선에 대한 반응 특성을 확인함으로써 선량계로의 적용 가능성을 검증하고자 하였다. 요오드화수은(HgI2)과 요오드화납(PbI2)을 기반으로 하는 검출기를 제작하여, 선형가속기에서 입사되는 고 에너지 방사선에 대하여 재현성, 선형성, Pulse rate response를 평가하였다. 이러한 항목들은 치료방사선의 선량계로써의 역할을 평가할 수 있는 필수 요소들이다. 실험 결과, 제작된 요오드화수은(HgI2)은 약 7% 내외의 재현성과 선형성 오차를 나타내었으며, 요오드화납(PbI2)은 1.7%의 선형성 오차와 12.2%의 재현성 오차를 가지는 것으로 확인되었다.

Studies evaluating the health effects of hazardous air pollutants assume that people's exposure to typical pollutant level is the same as specific regional pollutant level. However, depending on social and demographic factors, time-activity pattern of people can vary widely. Since most people live in indoor environments over 88% of the day, evaluating exposure to hazardous air pollutants is hard to characterize. Objective of this study was to estimate the exposure levels of university students of NO2, VOCs(BTEX) and PM10 using the scenarios with time-activity pattern and indoor concentrations. Using data from time-use survey of National Statistical Office in 2009, we investigated time-activity pattern of university students and hourly major action. A total of 1,057 university students on weekday and 640 on weekend spent their times at indoor house 13.04 hr(54.32%), other indoors 7.70 hr(32.06%), and transportation 2.36 hr(9.83%). Indoor environments in which university students spent their times were mainly house and school. Air pollutants concentrations of other indoor environments except house and school such as bar, internet cafe and billiard hall were higher than outdoors, indicating that indoor to outdoor ratios were above 1. According to three types of exposure scenarios, exposure to air pollutants could be reduced by going home after school.

In this study, an experiment was conducted on influent water with low concentrations of organic matter, such as river water or secondary treatment water of a sewage treatment plant, according to HRT changes by using aerobic biofilm. In the biofilm process, as the biofilm increases in thickness, the inner membrane can be low in oxygen transfer rate and become anaerobic conditions, while the detachment of biomass from biofilm occurs. To overcome these limitations in the detachment of microorganisms in biofilm, the yarn, which was made from poly propylene(PP), was weaved and manufactured into a tube. Then, a test was carried out by injecting air so that the interior of the biofilm could create aerobic conditions. The results of the experiment showed that the removal efficiency of TCODcr reached 66.1∼81.2% by HRT 2hr, and 50.9 ∼61.8% after HRT 1 hr. The removal efficiency of SCODcr was 45.9 to 55.1% by HRT 1hr, and 26.1% in HRT 0.5hr, showing the highest removal efficiency in HRT 1hr. The SS removal efficiency was at 81.8 to 94.6%, and the effluent SS concentration was very low, indicating less than 2.2 mg/L in all HRT's. As a result, the SCODcr and NH4 +-N that were removed per specific surface area and attached to microbial biofilm showed the highest efficiency in HRT 1hr with 8.37 gSCODcr/m2·d, 2.93 gNH4 +-N/m2·d. From the result of reviewing the characteristics of biofilm growth, microorganisms were found to be attached, and increased by 36 days. Later, they decreased in number through detachment, but showed a tendency to increase again 41 days later due to microbial reproduction.

서양민들레의 시설생산을 위해 배지조성 및 차광정도를 달리한 환경조건에 대한 생육특성과 그에 따른 생리활성 변이를 검토하고자 온실과 실험실 시험을 수행하였다. 서양민들레 시설생산을 위한 적정한 배지조합은 coco peat와 perlite를 각각 70 : 30과 50 : 50으로 혼합한 배지가 coco peat와 perlite 각각의 단독배지보다 생육 및 수량에 있어서 유의적으로 높게 나타났다(p<0.05). 차광정도에 따른 서양민들레의 초장, 근장, 엽수, 근직경, 엽면적, 엽록소 함량 및 생체중은 무차광이 50%와 70%차광보다 유의적으로 높게 나타났다(p<0.05). 총 페놀 함량과 총 플라보노이드 함량은 지하부보다는 지상부에서 높게 나타났다. 총 페놀 함량은 무차광에서 차광보다 높게 검출되었고, 총 플라보노이드 함량은 50%차광에서 가장 높았고 그 다음이 무차광과 70%차광 순으로 높았다. 한편, DPPH 라디컬 소거능과 아질산염 측정을 통한 항산화성은 추출물 농도가 증가할수록 높은 활성을 보였고 지하부보다는 지상부에서, 차광보다는 무차광에서 높은 활성을 보였다.

The phenolic compounds which were extracted with 70% ethanol from Ulmus pumila for 12 hr were the highest as 17.9±1.0 mg/g. DPPH scavenging activity of 70% ethanol extracts was also the highest as 89.5±1.9% and it was confirmed to be high as 80% over in both of water and 70% ethanol extracts containing 50 μg/mL over phenolic concentration. ABTS radical cation decolorization activities of water and 70% ethanol extracts were higher as 96.8±2.9%, antioxidant protection factor (PF) was 2.0 PF in 70% ethanol and showed higher activities in both of water and 70% ethanol extracts containing 200 μg/mL phenolic concentration as 2.5 PF than BHA. TBARs of 70% ethanol extracts was 86.5±4.6%, it showed high anti-oxidative activity in 50∼200 μg/mL phenolic concentrations of water and 70% ethanol extracts as 80% over. The angiotensin converting enzyme (ACE) inhibitory activity of Ulmus pumila extracts against hypertension was 77.4% and 90.6% in water and 70% ethanol extracts of 200 μg/mL phenolic concentration. Xanthine oxidase inhibitory activity of Ulmus pumila extracts for anti-gout effect was not observed in water extracts, but it showed 30% inhibitory activity in 70% ethanol extracts, and 48.1% at 200 μg/mL phenolics concentration.