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宋昌燮,李信昊,金明煥 忠北大學校 農業科學硏究所 2003 農業科學硏究 Vol.20 No.-
This study was performed to analyze the toxic effects fo ecoconcrete which was developed to be applicate the farm road and agricultural structure's backfill materials To this ends, a series of test was conducted for the soil picked in Hagso, located in Chungbuk province The mixture ratio of ESC was 10%, 20% and 30% by weight of dry soil Produced sample was observed through state of fish by intervals of time From the first toxic test result, singularity symptoms were observed to fish increases with ESC mixture ratio Common symptoms were observed impaired digestion, difficulty in breathing, body color change Specially, singularity symptoms were observed the most notedly in aquarium which mixture ratio 20% After 18 days the second toxic test result, it was found that in number of survival of fish could not observed change in aquarium, excepted ESC mixture ratio 20% Therefore, developed ecoconcrete does not influenced in number of survival of fish
진동대 모형 실험과 3차원 수치해석을 통한 농업용 저수지의 내진안정성 분석
송창섭, 김명환, 우제근 忠北大學校 農業科學硏究所 2017 農業科學硏究 Vol.33 No.1
The object of this paper was to determine seismic safety of agricultural reservoir. This study was carried out to analysis for the displacement characteristic and seismic acceleration characteristic. This study compare and evaluated the results of shaking table tests and 3-D Numerical analysis. As a result of the shaking table test, acceleration increased 10% after the installation in the short period seismic wave toward the center of levee, The maximum displacement was 11.98 mm in long - term seismic wave, and the permissible shipment variation was corrected to be less than 1% and 220 mm in ‘Assessment and improvement of seismic performance of existing dam’. As a result of 3-D Numerical analysis by combined load of railway vibration load and ground acceleration, the acceleration increased by maximum 2.97 times from bedrock acceleration 0.154 g in short period and long period seismic wave, The displacement was found to be 79.6 mm above the bank in the long - term seismic wave after construction, and the permanent displacement was 11.5 mm in the railway. 3-D Numerical analysis results showed ‘Assessment and improvement of seismic performance of existing dam’ as well as shaking table model test. Further research is needed on the combined action of railway and seismic loads for the seismic stability of agricultural reservoirs.
Variation in Formaldehyde Removal Efficiency among Indoor Plant Species
Kim, Kwang Jin,Jeong, Myeong Il,Lee, Dong Woo,Song, Jeong Seob,Kim, Hyoung Deug,Yoo, Eun Ha,Jeong, Sun Jin,Han, Seung Won,Kays, Stanley J.,Lim, Young-Wook,Kim, Ho-Hyun American Society for Horticultural Science 2010 HortScience Vol.45 No.10
<P>The efficiency of volatile formaldehyde removal was assessed in 86 species of plants representing five general classes (ferns, woody foliage plants, herbaceous foliage plants, Korean native plants, and herbs). Phytoremediation potential was assessed by exposing the plants to gaseous formaldehyde (2.0 μL·L<SUP>−1</SUP>) in airtight chambers (1.0 m<SUP>3</SUP>) constructed of inert materials and measuring the rate of removal. <I>Osmunda japonica</I>, <I>Selaginella tamariscina</I>, <I>Davallia mariesii</I>, <I>Polypodium formosanum</I>, <I>Psidium guajava</I>, <I>Lavandula</I> spp., <I>Pteris dispar</I>, <I>Pteris multifida</I>, and <I>Pelargonium</I> spp. were the most effective species tested, removing more than 1.87 μg·m<SUP>−3</SUP>·cm<SUP>−2</SUP> over 5 h. Ferns had the highest formaldehyde removal efficiency of the classes of plants tested with <I>O. japonica</I> the most effective of the 86 species (i.e., 6.64 μg·m<SUP>−3</SUP>·cm<SUP>−2</SUP> leaf area over 5 h). The most effective species in individual classes were: ferns-<I>Osmunda japonica</I>, <I>Selaginella tamariscina</I>, and <I>Davallia mariesii</I>; woody foliage plants-<I>Psidium guajava</I>, <I>Rhapis excels</I>, and <I>Zamia pumila</I>; herbaceous foliage plants-<I>Chlorophytum bichetii</I>, <I>Dieffenbachia</I> ‘Marianne’, <I>Tillandsia cyanea</I>, and <I>Anthurium andraeanum</I>; Korean native plants-<I>Nandina domestica</I>; and herbs-<I>Lavandula</I> spp., <I>Pelargonium</I> spp., and <I>Rosmarinus officinalis</I>. The species were separated into three general groups based on their formaldehyde removal efficiency: excellent (greater than 1.2 μg·m<SUP>−3</SUP> formaldehyde per cm<SUP>2</SUP> of leaf area over 5 h), intermediate (1.2 or less to 0.6), and poor (less than 0.6). Species classified as excellent are considered viable phytoremediation candidates for homes and offices where volatile formaldehyde is a concern.</P>
Ecotoxicological evaluation for contaminated abandoned mine soils using Daphnia magna
Myeong seob Kim,Jino Son,Hyoung-ho Mo,Yongeun Kim,Yun-Sik Lee,Kijong Cho 한국응용곤충학회 2011 한국응용곤충학회 학술대회논문집 Vol.2011 No.05
Sedimentation of soil particles in water is perhaps the most significant pathway to contamination of aquatic ecosystems. In this scenario, the use of freshwater organisms for assessing sediment toxicity will be considered more ecologically relevant than tests that use aqueous soil extracts. To evaluate the toxicity of soils sampled in the vicinity of the abandoned mine located in the Gyeonggi province, Daphnia magna were exposed to a 1:4 of soil to water which soil samples were serially two-fold serially diluted with clean sand to concentrations ranging from 6.25 to 100 % % (w/w) for 24- and 48-h. Irrespective of exposure time, the survival of D. magna for reference soil was not decreased, while the survival of D. magna showed high sensitivity to the soils with moderate as well as high metal concentrations. Moreover, the heavy metal concentrations in the water samples increased with increasing the heavy metal concentrations in the soils, which indicates the increased sensitivity is the consequences of the bioavailable fraction of contaminants in soils. These results clearly showed that the freshwater organism D. magna can be used as test species to assess the potential impact of soil contaminants into aquatic ecosystems.