본 연구에서는 리더의 성격 특성-리더십 스타일-팀 애피커시의 관계를 살펴보았다. 본 연구의 주요내용은 리더의 빅 파이브 성격 특성이 변혁적 리더십에 영향을 미치는가, 변혁적 리더십이 팀 애피커시에 영향을 미치는가, 그리고 리더의 빅 파이브 성격 특성과 팀 애피커시 간의 관계에서 변혁적 리더십의 매개 효과가 존재하는 가이다. 가설 검증을 위해 14개 기업, 85개 팀을 대상으로 자료를 취합하였으며, 최소자승법(OLS: Ordinary Least Squar

For the proposal of Microcystis aeruginosa control technique by coagulants, removal effects of coagulants were carried out using isolated strain and collected water bloom of M. aeruginosa on Downstream of the Nakdong River. Both of purified and field-collected M. aeruginosa were entirely sedimented by the addition of the coagulant Ceramic-Zeolite type Co 100 (1.5 ㎎/ℓ) within 24 hr, but Yellow loess (10 ㎎/ℓ) was less effective for the removal of M. aeruginosa within 24hr. Thus it was concluded that Ceramic-Zeolite type Co 100 was the most effective coagulant.

Improvement of water quality and Investigation of bacterial characteristics have been conducted in a pilot plant using biological activated carbon (BAC) in water treatment process at the downstream of the Nakdong River. Most of water control parameters were highly improved after passing through BAC. Approximately 54% of dissolved organic carbon was removed in coal-based BAC process. Bacterial biomass and bacterial production appeared 9.8×108 CFU/g and 7.l㎎-C/㎥·hr in coal-based BAC, respectively. Predominant bacteria species grown in BAC were identified as Pseudomonas, Flavobacterium, Alcaligenes, Acinetobacter and Aeromonas species. Particularly Pseudomonas vesicularis was dominant in both coal-based and coconut-based BACs, while Pseudomonas cepacia was dominant in wood-based BAC.

The relationship between primary productivity and changes in water quality was investigated at Mulgum station, a site downstream of the Nakdong River, Korea. Phytoplankton production was characterized by blooms of Microcystis aeruginosa during the summer and Stephanodiscus hantzschii during the winter. Primary production and secondary production by bacterioplankton ranged from 1.5∼53.5㎎·C/ℓ'day and 0.1∼0.3 ㎎·C/ℓ'day, respectively. Distribution of total organic carbon appeared to be highly correlated with phytoplankton biomass, especially during blooms of M. aeruginosa, when particulate organic carbon was 81% of total organic carbon and the main source of organic materials supplied into the water. The correlation coefficient between chlorophyll-a and BOD was 0.86. Thus it was concluded that autochthonous phytoplankton mostly affected the BOD level. Total bacterial numbers were also highly correlated with chlorophyll-a (r2=0.84) and the bacterial community appears to be regulated by phytoplankton biomass in this area.