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Soil compression influences the avoidance behavior of Allonychiurus kimi(Collembola)to cadmium and copper

Pedosphere 2022年第3期32卷 487-494页

作者： Jino SON Yun-Sik LEE yongeun kim Kijong CHO OJeong Eco-Resilience Institute Korea UniversitySeoul 02841(Republic of Korea) Department of Environmental Science and Ecological Engineering Korea UniversitySeoul 02841(Republic of Korea) Institute of Environment and Ecology Korea UniversitySeoul 02841(Republic of Korea)

The behavior of soil organisms inhabiting soil pore spaces can be influenced by soil compression,which can affect their avoidance behavior to *** this study,we aimed to evaluate the effect of soil compression on the avoidance behavior of Allonychiurus kimi(Collembola)to heavy metals cadmium and ***,to assess the applicability of the avoidance test guideline of the International Organization for Standardization(ISO)developed for Folsomia candida,we investigated the avoidance behavior of *** to cadmium and copper in an artificial soil with a loose structure(bulk density of 0.25 g cm^(-3)),the porous texture of which was sufficiently loose to enable *** to move between pore *** effect of soil compression on the avoidance behavior of *** to both metals was evaluated in compressed soil(bulk density of 0.64 g cm^(-3))with a uniformly compressed soil surface,and avoidance behavior was investigated at 24-h intervals over a 120-h *** that *** is unable to burrow into compressed soil,the compressed soil test can minimize the effects of differences in soil factors,such as soil porosity and bulk density,on the behavior of this *** the artificial soil,a statistically significant avoidance behavior of *** was observed at cadmium and copper concentrations greater than 50 and 200 mg kg^(-1),respectively,thereby indicating the applicability of the ISO avoidance test guidelines for *** compared at the same exposure time point,the avoidance response to both metals in compressed soil was less sensitive than that in uncompressed *** addition,we observed differences in the effects of metals on avoidance response in the compressed soil over time,with the effect of cadmium increasing with time and the effect of copper showing the opposite ***,we found that soil compression can affect the avoidance behavior of *** to cadmium and copper,and we discussed the advantages and limitations of using compressed

关键词： behavioral endpoint ecotoxicity test habitat function heavy metal pollutant springtail

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维普期刊数据库

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Evaluation of the relationship between two different methods for enumeration fecal indicator bacteria: Colony-forming unit and most probable number

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Journal of Environmental Sciences 2010年第6期22卷 846-850页

作者： Kyung Hwa Cho Dukki Han yongeun Park Seung Won Lee Sung Min Cha Joo-Hyon Kang Joon Ha kim Department of Environmental Science and Engineering Gwangju Institute of Science and Technology Deparment of Civil and Environmental Engineering Dongguk University-Seoul Sustainable Water Resource Technology Center Gwangju Institute of Science and Technology

Most probable number （MPN） and colony-forming unit （CFU） estimates of fecal indicator bacteria （FIB） concentration are common measures of water quality in aquatic environments. Thus, FIB intensively monitored in Yeongsan Watershed in an attempt to compare two different methods and to develop a statistical model to convert from CFU to MPN estimates or vice versa. As a result, the significant difference was found in the MPN and CFU estimates. The enumerated Escherichia coli concentrations in MPN are greater than those in CFU, except for the measurement in winter. Especially in fall, E. coli concentrations in MPN are one order of magnitude greater than that in CFU. Contrarily, enterococci bacteria in MPN are lower than those in CFU. However, in general, a strongly positive relationship are found between MPN and CFU estimates. Therefore, the statistical models were developed, and showed the reasonable converting FIB concentrations from CFU estimates to MPN estimates. We expect this study will provide preliminary information towards future research on whether different analysis methods may result in different water quality standard violation frequencies for the same water sample.

关键词： most probable number colony-forming unit fecal indicator bacteria Escherichia coli enterococci

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维普期刊数据库

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Study of Reducing Image Sticking Artifacts in the Wide Screen TFT-LCD Monitor

Study of Reducing Image Sticking Artifacts in the Wide Scree...

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2007亚洲显示国际会议

作者： yongeun Park Eungsang Lee Suki kim Sungha kim Youngkwon Jo Korea University Anam-dong 5ga Seongbuk-guSeoulKorea LCD Biz Samsung Electronics Tangjeong-myunAasn-siChngnam-DoKorea ULSI Lab Korea University Anam-dong 5gaSeongbuk-guSeoulKorea ULSI Lab Korea University Anam-dong 5gaSeongbuk-guSeoulKorea ULSI Lab Korea University Anam-dong 5gaSeongbuk-guSeoulKorea

＜正＞In order to improve the image quality of the flat panel display,we need to reduce the image retention in the display. More and more users demand for the high picture quality of the display *** we need the devices to be durable for using for a long *** the high quality against the image sticking of the display devices we have achieved the high improvement of VHR （Voltage Holding Ratio）.The advantage of this technology is that the product durability can be made for a long time in a better quality of *** are many ways to increase the *** terms of the characteris- tics of the TFT devices,reducing the leakage current effects is the main theme in this display industry field.

关键词： Image Sticking Retention Leakage

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