落後 農漁村地域의 特性과 上·下水道 問題 : 충남 서천군을 사례로 A Case Study of Seochun-Gun in the Province of Chungnam

강성철,신동호 부산대학교 환경문제연구소 1996 環境硏究報 Vol.14 No.1

This paper proposes to create solutions to reduce problems associated with supplying clean water and reducing environmental pollution in coastal areas in Korea. It has examined, as a case study, changing social and economic conditions of rural communities in Seochun-Gun, Chungnam Province. It has been found that the region is expected to see exhaustion of clean water resources by continuos water development projects, and contaminations of water quality in costal areas by domestic wastes. The paper has suggested reducing domestic water consumption to reserve resources for clean drinking water and improving sewerage systems to preserve water quality in the coaste in the region.

부산광역시의 대기질 변화경향 및 특성에 관한 연구

이화운,김유근,원경미,홍정혜,문윤섭,장난심,정우식 부산대학교 환경문제연구소 1997 環境硏究報 Vol.15 No.1

環境權小考

千柄泰 부산대학교 환경문제 연구소 1983 環境硏究報 Vol.1 No.-

韓國企業의 環境情報公示動機의 探索

崔鍾序,裵信實 부산대학교 환경문제연구소 2002 環境硏究報 Vol.20 No.-

Korea experienced a unprecedented financial crisis in her history staring from 1997 through the following several years. The aftermath of the crisis still lingers upon many of the Korean companies as the world economy faces ever more turbulent changes with the start of the 21st century. The economic adversity is considered to have brought about the decline in the social responsibility of the Korean firms in general, and the propensity to disclose corporate environmental information in particular. This paper aims to investigate whether the environmental disclosures by Korean listed companies have undergone structural changes in terms of their disclosure behaviors in relation to selected fun characteristic variables including profitability, size, and capital structure. The results of the empirical analysis, however, show that except for the consistently positive relation between fan size and the propensity to disclose throughout the 3 years of 1999 through 2001, no other hypothesized relationships are validated.

Alcaligenes sp. LKS-751에 의한 Ethylene Glycol 분해에 관한 연구

이상준,권영석,이종근 부산대학교 환경문제연구소 1990 環境硏究報 Vol.8 No.-

자연환경으로 다량 유입되고 있는 2가 alcohol, ethylene glycol 분해균 LKS-751을 폐수로부터 enrichment culture technique에 의해 순수 분리하여 분류학적 위치를 검토하였다. 또한 이 분리균주의 ethylene glycol 분해 조건 및 oxidation test와 ethylene glycol 분해시 생성되는 metabolic intermediate등에 대하여 실험한 결과는 다음과 같다. 1. 분리균주 LKS-751의 형태적, 배양적, 생화학적 제 특성을 조사하여 분류학상 위치를 검토한 결과 Alcaligenes속으로 동정 되었으며 분리균주를 편의상 Alcaligenes sp. LKS-751로 명명하였다. 2. Alcaligenes sp. LKS-751의 생육에 가장 효과적인 배지 조성은 ethylene glycol 0.5%, 질소원(NH₄)₂HPO₄ 0.2%, pH 8.0이었으며 ethylene glycol의 분해율은 100%였다. 3. Alcaligenes sp. LKS-751의 glycol 화합물들에 대한 기질 특이성은 매우 높아서 ethylene glycol만 분해하였고 나머지 glycol 화합물들은 전혀 이용을 하지 않았다. 4. Alcaligenes sp. LKS-751의 탄소원으로 이용이 되지 않았던, ethylene glycol 이외의 glycol 화합물들에 oxidation도 되지 않는 기질 특이성을 보였다. 5. Alcaligenes sp. LKS-751의 예상 중간대사산물의 oxidation test 결과 acetaldehyde와 acetic acid를 중간 대사산물로 하는 대사 경로이거나 새로운 대사 경로로 추정된다. 6. Alcaligenes sp. LKS-751에 의한 ethylene glycol 분해시 생성되는 중간 대사 산물은 carboxyl group을 가진 산성 화합물로 acetate와 비슷한 Rf value를 나타냈고 다른 유기산과는 상이한 Rf value를 나타냈다. Microorganisms capable of utilizing ethylene glycol for the sole carbon source were isolated from sewage and soil by enrichment culture technique. One strain of these isolated strains, designated as LKS-751, was selected for the study concernning the growth characteristics for ethylene glycol. The results, experimented on the identification of this isolated strain LKS-751, the growth characteristics and degradation rate on ethylene glycol, the oxidation test on glycol compounds, and the metabolic products formed from this isolated strain, were as follow. 1. The isolated strain LKS-751 was identified as Alcaligenes from the results of morphological, cultural, and biochemical tests. The Isolated strain was named temporarily Alcaligenes sp. LKS-751 for convenience. 2. The optimal condition of medium for the growth and the degradation of ethylene glycol was observed. The initial pH of the medium was pH 8.0 ethylene glycol 0.5% and diammonium hydrogen phosphate 0.2% were selected for the sources of carbon and nitrogen, respectively. The degradation rate of ethylene glycol was 100% until the early stationary phase. 3. Alcaligenes sp. LKS-751 was tested for ability to utilize different kinds of glycol compound as the carbon source. Except ethylene glycol, other glycol compounds were not utilized for the strain's growth source. 4. Glycol compounds that did not serve as the growth substrate were tested further on the oxidation rate using resting cell preparations of Alcaligenes sp. LKS-751. Those compounds also were not oxidised by resting cell preparations of Alcaligenes sp.LKS-751. 5. The expected metabolic intermediates of ethylene glycol by Alcaligenes sp. LKS-751 were tested on the oxidation rate. Glyoxylate was not oxidised, but acetaldehyde and acetate were oxidised a little. 6. The metabolic product formed from ethylene glycol Alcaligenes sp. LKS-751 was suspected to a carboxyl compound. The Rf value of the metabolic product on thin layer chromatography was 0.168 which was similar to that of acetate. But further investigation on the structure of the metabolic product is required. Summing up the above results, the metabolic pathway of Alcaligenes sp. LKS-751 on ehylene glycol does not seem to have glyoxylate as the metabolic intermediate.

Effects of the Insect Growth Regulator Dimilin on Larval Development of Hemigrapsus sanguineus(Crustacea. Brachyura)Reared in the Laboratory

Kim,Chang Hyun,Lee,Chu 부산대학교 환경문제연구소 1990 環境硏究報 Vol.8 No.-

곤충 유충에 있어 각피의 키틴합성을 저해하는 곤충성장억제제인 Dimilin의 영향에 대해 무늬발게 유생을 실험종으로 하여 여러 농도에서 실험하였다. 무늬발게 유생은 대조군과 0.5, 1, 5 그리고 10㎍L?? 농도에서 사육되었으며, 본 연구의 정확한 분석을 위하여 실험은 3회 반복 시행되었다. 대조군과 10㎍L?? 농도에 있어 사망율은 현저한 차이가 났으나 5㎍L?? 농도와 10㎍L?? 농도에서는 현저한 차이점을 발견할 수 없었다. 치사농도를 10% 이하의 게유생이 부화후 마지막 zoea 유생기에 도달하는 것으로 정의한다면 곤충성장억제제인 Dimilin은 5㎍L??와 10㎍L?? 농도에서 무늬발게 유생에 대해 치사영향을 준다고 할 수 있다. The effects of insect growth regulator Dimilin which interfere with the synthesis of chitin in the cuticle of insect larvae were investigated at various concentrations using the crab larvae of Hemigrapsus sanguineus. The larvae were cultured at control, 0.5, 1, 5 and 10㎍L?? Dimilin solutions and three replicate experiments were carried out to give correct analysis. Significant differences in percent mortality have occurred between control and 10㎍L?? when the larvae were exposed to Dimilin whereas no differences were found between 5 and 10㎍L?? Dimilin concentrations. If lethal concentration is defined as concentration at which less than 10 percent of crab larvae reach to the last zoeal stage from hatching it can be concluded that insect growth regulator Dimilin is lethal to the larvae of Hemigrapsus sanguineus at 5 and 10㎍L?? Dimilin.

鹽酸 溶液에서의 Cb+²-Cr+³-Pb+²의 分配係數 및 分離 特性

金正均,朴垣雨 부산대학교 환경문제 연구소 1989 環境硏究報 Vol.7 No.-

Cation exchange distribution coefficients of poly (dithiocarbamate) are presented for ??, ?? and ?? in hydrochloric acid. The distribution coefficients were determined by using the batch method. The distribution coefficients of several metal ions on dithiocarbamate resin are decreased as hydrochloric acid concentrations are increased. Based on these distribution data, the possibilities of separation of the metal ions are indicated and discussed.

수영만의 조류, 염분 및 부유물질의 분포

김차겸 부산수산대학교 환경문제연구소 1992 環境問題硏究論文集 Vol.3 No.-

노랑초파리 實驗集團內의 有害遺傳子에 관한 硏究

李順英,劉美愛,李元鎬 부산대학교 환경문제 연구소 1986 環境硏究報 Vol.4 No.-

The genetic variabilities in an experimental population of D. melanogaster were undertaken. The experimental population was composed of D. melanogaster which had the lethal-free and sterile-free second chromosome collected from Sasang natural population. The results were as follows: 1) The frequency of lethal chromosome was 7.53%, 9.56%, and 15.00% at the 171 days, 379 days, and 756 days respectively, and its allelic rate was 9.76% at the 756 days. 2) The variabilities such as semi-lethal, subvital, and normal chromosome were distributed to quasinormal type. 3) The frequency of second chromosome which carried female sterility was estimated to be 3.59%, 7.56% at the 171 days and 756 days, respectively. The frequency of male sterility was analyzed 1.19% at the 171 days and 4.20% at 756 days. 4) The elimination rate caused by deleterious genes in homozygotes was 0.0033, and the effective population size was about 600 flies at the 756 days population. 5) The actual population number was ranging from 1571 to 3229 flies in female and from 1988 to 3608 flies in male.

染色排水의 脫色處理에 의한 再使用

金景煥 부산대학교 환경문제 연구소 1985 環境硏究報 Vol.3 No.-