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地方大都市의 都市開發問題에 관한 小考 : 大田市의 經驗을 中心으로 Local City -A Case Study for Dae-Jeon City
朴贊圭 忠南大學校 産業技術硏究所 1989 산업기술연구논문집 Vol.4 No.1
Korean local cities have been grown and developed at fast speed through the process of industrialization and urbanization in the past several decades. Recent years, local governments have expressed the strong will that they try to develope and improve their own cities according to their local charactes, riding the waves of localization movement. Dae-Jeon city has also experienced many changes in urban development. It had chances of success or failure in the development process. In order to plan and build a healthy city, urban planners and decision makers should reflect the valuable lessons from the past experiences in the process of urban development. In this point of view, the author reviewed the several problems in the urban development process of Dae-Jeon city for past several years, including environmental conservation, commercialism and urban design regulations.
Aspergillus nidulans 온도감수성 돌연변이주의 분리 및 분석
박찬규,강현삼 한국미생물학회 1978 미생물학회지 Vol.16 No.3
About 40 temperature-sensitive mutants have been isolated as a preliminary step to study the spore germination, the cell cycle, and the control of macromolecular synthesis in Aspergillus nidulans. To obtain temperature-sensitive mutants rapidly and effectively, the selective enrichment method using antifungal antibiotic nystatin was developed. Based on the data which had applied to the concentration of auxotrophic mutants by the earlier investigators, the optimal concentration and the time of treatment at the nonpermissive temeprature were determined as 50 to 100 units per ml and 4.5 hr., respectively. Out of 41 ts mutants assigned to the strain symbol PK, thirteen that seemed to be arrested at the earlystage of spore germination were subjected to the further cytological and genetic analysis. Elght of these mutants are able to form germ tube and five not. Staining with acid fuchsin for the 5PK strains shows that one irreversible mutant, PK6 strain able to form germ tube, accumulate mitotic spindle, being arrested in mitosis. Another PK15 and PK23 strain have more than one intact nucleolus without germ tube formation at the restrictive temperature. the temperature-senstive mutation in PK12 strain, the onlystrain which is able occurred in certain gene specific for the germination of spore. All of the ts markers are recessive and complement each other in heterokaryon between two different ts markers at the restrictive temperature.
돌연변이율을 증가시키는 기능이 결여된 플라스미드 pKM101의 분리 및 그 특성에 관한 연구
박찬규,하지홍,이세영 한국미생물학회 1980 미생물학회지 Vol.18 No.1
As preliminaries for the study of Plasmid pKM101 functions nad their interaction with the host DNA repair genes, seven mutants of pKM101, visualized on tetrazolium-galactose plates, deficient in their abitity to enhance mutagenesis were isolated and paritally characterizee. They all have altered functions not only for mutagenesis against MMS and 4-NQO but for the spontaneous reversion of host cell.