Kyonggi University

About: Kyonggi University is a education organization based out in Suwon, South Korea. It is known for research contribution in the topics: Catalysis & Dielectric. The organization has 1946 authors who have published 4404 publications receiving 64791 citations.

Isolation and characterization of heavy-metal-resistant bacteria and their applications in environmental bioremediation

Abstract: Heavy metal pollution is one of the emerging problems of environmental contaminations due to the rapid industrialization of geologic and anthropogenic activities. Among further metals, chromium originates to be noxious due to its connotation with other metals. Therefore, the present investigation aims to isolate, identify and characterize the bacteria from soil samples and to evaluate their heavy metal (chromium) degrading efficiency under batch mode condition. Among the 300 bacterial isolates, two strains such as Pseudomonas fluorescens (YPS3 GenBank number—MH580200) and Bacillus safensis (YKS2 GenBank number—H539636) have found to possess effective chromium degrading capacity up to 84% and 72%, respectively, which was identified by morphological, biochemical and molecular characterization. The 16S rRNA phylogenetic association was resolute by means of bioinformatics and recognized as bacterial species YKS2 and YPS3 with 100% sequence resemblance. In conclusion, the findings show effective chromium degradation level by the bacterial strains in the contaminated environment soil. These biological mediated metal degradation methods will be an effective green alternative for polluted environment.

Overview and application of the National Aquatic Ecological Monitoring Program (NAEMP) in Korea

Abstract: This paper provides an overview of the development and application of the National Aquatic Ecological Monitoring Program (NAEMP) in Korea, which uses biological and habitat-riparian criteria for river/stream and watershed management. Development of NAEMP began in 2003, with recognition by the Korean Ministry of Environment (MOE) of the limitations of applying chemical parameters (e.g., biochemical oxygen demand (BOD)) as the principal targets of water environment management. Ecosystem health criteria under NAEMP were developed from 2003 to 2006. Candidate sites for monitoring were also screened and established across the country. NAEMP was implemented in 2007, and since then a standard protocol of nationwide monitoring based on multi-criteria has been implemented to assess the ecological condition of rivers and streams. The monitoring results indicate that many Korean rivers and streams are severely de- graded, with biological conditions that are much worse than their water chemistry suggests. In 2009, 24% of rivers and streams were in classes C (Fair) and D (Poor) for BOD, but more than 71, 53, and 27% were categorized as Fair to Poor according to fish, diatom, and benthic macroinvertebrate assemblages, respec- tively. NAEMP is promising in that the results have already had great impacts on policy making and scientific research relevant to lotic water environment and watershed management in Korea. In the future, NAEMP results will be used to develop more aggressive regulations for the preservation and restoration of rivers/ streams, riparian buffer areas and watersheds. Another future aim of the NAEMP is to develop aquatic ecolo- gical modeling based on the monitoring results.

A Methodology Combining Cosine Similarity with Classifier for Text Classification

Abstract: Text Classification has received significant attention in recent years because of the proliferation of digital documents and is widely used in various applications such as filtering and recommendat...