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최경민,박응로,주홍신,양재경,이기영,이성택,이무춘,Choi, Kyung-Min,Park, Eung-Roh,Ju, Hong-Shin,Yang, Jae-Kyung,Lee, Ki-Young,Lee, Sung-Taik,Lee, Mu-Choon 유기성자원학회 1996 유기물자원화 Vol.4 No.2
자연계로부터 3종의 광합성 세균 strain KN 1-1, KN 2-1과 KN 2-3을 분리하여 돈분 폐수 처리에 대한 연구를 수행하였다. 유기산이 첨가된 배지에서 광합성 세균의 생육은 유기산을 첨가하지 않은 경우에 비해 2~3배 증가하였으며, bacteriochlorophyll a 함량도 1.5~2배까지 증가함을 보였다. 또한 축산 농가에서 직접 채취한 돈분 폐수에 광합성 세균을 첨가하였을 때 COD 감소율은 KN 1-1인 경우 80%, KN 2-1 89%, KN 2-3 75%를 나타내었다. Photosynthetic bacteria, strains KN 1-1, KN 2-1 and KN 2-3 were isolated from nature, and were studied for swine wastewater treatment. Growth of those photosynthetic bacteria were increased to 2~3 fold in organic-acid added medium(sodium acetate 1g, sodium propionate 1g and sodium butyrate 1g in Lascelles basal medium $1{\ell}$) than cultivation in Lascelles basal medium, and amount of bacteriochlorophyll a were increased to 1.5~2 fold. Chemical Oxygen Demand(COD) in swine wastewater using photosynthetic bacteria, strains KN 1-1, KN 2-1 and KN 2-3 were reduced 80%, 89% and 75%, respectively.
최경민,양재경,박응로,배진우,서용기,이성택,Choi, Kyung-Min,Yang, Jae-Kyung,Park, Eung-Roh,Bae, Jin-Woo,Seo, Yong-Ki,Lee, Sung-Taik 유기성자원학회 1997 유기물자원화 Vol.5 No.1
5-Aminolevulinic acid (ALA) 생합성의 $C_5$ 경로의 전구물질인 L-glutamic acid가 Rhodospirillum rubrum N-1 새포내에서 ALA 생산의 역할을 검토하였다. Lascelles의 기본배지에 L-glutamic acid와 levulinic acid (LA)를 각각 30, 20 mM 첨가배양으로써 균체외 ALA 생산성이 40배 증가(76 mg/l)하였다. 한편 $C_4$ 경로의 기질인 glycine과 succinic acid를 대수기 중기에 각각 60 mM 첨가함으로써, 균의 증식은 억제되었으나 균체외의 ALA는 52 mg/l에 달하였다. The role of L-glutamic acid, a precursor of $C_5$ ALA biosynthetic pathway, on the production of 5-aminolevulinic acid (ALA) has been described in cells of Rhodospirillum rubrum N-1. To the Lascelles basal medium the addition of both 30 mM L-glutamicacid and 20 mM levulinic acid (LA) provided to increase the extracellular ALA yield up to 40 fold (76 mg/l). By the addition of both 60 mM glycine and succinic acid, precursorsof $C_4$ ALA biosynthetic pathway, at middle log phase of cell growth ALA yield was increased 27 fold (52 mg/l) although the celt growth was inhibited to a certain extent.
혼합 미생물이 식물 (Salvia)의 생장에 미치는 영향
최경민(Kyung-Min Choi),박응로(Eung-Roh Park),주흥신(Hong-Shin Ju),앙재경(Jae-Kyung Yang),서정근(Jeung-Keun Suh),이성택(Sung-Taik Lee),박창희(Chang-Hee Park) 유기성자원학회 1996 유기물자원화 Vol.4 No.2
광합성 세균, 젖산균, 효모 등의 미생물을 토양 관주, 엽연 시비의 방법으로 식불 (sa!νia) 에 처리하고 식물의 생장에 마치는 효과를 검토하였다. 액체 배양한 광합성 세균을 100 배 희석하여 토양 관주할 경우 다른 미생물군을 단독으로 처리한 경우에 비해 식물의 생장이 우수하여 대조구보다 약 160%의 생장 촉진 효과를 나타내었다. 미생물군을 혼합하여 처리한 경우에는 세 종류의 미생물을 혼합한 후 10 배 희석하여 처리한 경우에 가장 우수한 효과를 나타내었으며 대조구보다 212% 식물 생장이 촉진되었다. Effect of effective microorganisms on the growth of plant (salα:a sp.) was investigated. Microorganisms used were photosynthetic bacteria, lactic acid bacteria and yeasts. When photosynthetic bacteria were inoculated to soil by 100 dilution, treated plants showed 160% growth by length compared to control. When photosynthetic bacteria, lactic acid bacteria and yeasts were mixed, diluted by 10 and inoculated to soil, the plants showed 212% growth compared to control. Microbial populations were increased in the treated soil.
17β-Estradiol이 수컷 송사리의 성적 행위 및 생식능력에 미치는 영향
류지성(Jusugn Ryu),이철우(Chulwoo Lee),박응로(Eung-Roh Park),남성숙(Seong-Sook Nam),남규찬(Kyu-Chan Nam),류홍일(Hong-Il Rhu),전성환(Seong-Hwan Jeon),나진균(Jin Gyun Na),최덕일(Doug Il Choi),박광식(Kwangsik Park) 한국독성학회 2001 Toxicological Research Vol.17 No.2
Sexual behavior and reproductivity of male fish were studied as an in vivo screening method of endocrine disruptors. Male medaka (Oryzias latipes) were exposed to 17β-estradiol at nominal concentrations of 2 and 20 ㎍/l 14 days. After exposure of the chemical, sexual behavior between male medaka and normal female which were injected with prostaglandin F2α just before the test, was ana lysed by using video camera for one hour. Normal control male showed courtship dancing such as following, guarding, dancing and crossing while 17β-estradiol treated male did not show any type of courtship dancing. Furthermore, fecundity and fertility were significantly decreased in the treated group. It was suggested that analysis of sexual behavior could be a useful endpoint for the screening of the endocrine disruptors.
파이로시퀀싱 분석법을 이용한 주거 환경 중 거실과 화장실의 세균 특성
이시원 ( Siwon Lee ),정현미 ( Hyen Mi Chung ),박응로 ( Eung Roh Park ) 한국미생물생명공학회(구 한국산업미생물학회) 2016 한국미생물·생명공학회지 Vol.44 No.1
본 연구에서는 파이로시퀀싱 분석법을 이용하여 주거 환경 중 거실과 화장실의 세균 다양성을 분석하였다. 주거 환경 중 거실과 화장실에 존재하는 세균의 총 유전자량과 다양성 지수는 차이가 없었으나, 존재하는 세균의 종류에서는 차이가 나타났다. Phylum-level에서는 거실에서 나타나지 않은 Acidobacteria, Chlorobi, Chloroflexi, Fusobacteria, Nitrospirae 및 Planctomycetes문이 화장실 공기중에서 분석되어 상대적으로 넓은 영역의 세균 분포가 추정되었으며, classlevel에서는 우점하는 Proteobacteria문 중 β-Proteobacteria와 δ-Proteobacteria강이 거실에 비해 화장실에서 높은 비율로 분석되었다. 한편 genus-level에서는 거실이 화장실에 비해 상대적으로 다양한 속이 분석되었으나, 모두 Methylobacterium 속이 우점하였으며 두 주거 환경에서 각각 특징적으로 분포하는 미생물이 존재하였다. In this study, bacterial diversity in the living room and bathroom of a residential environment was analyzed using the pyrosequencing method. There was no difference in the diversity index of bacteria between the 2 rooms; however, differences were noted in the composition of bacteria. The classes β-Proteobacteria and δ-Proteobacteria were found in the bathroom at higher abundances than in the living room. The phyla Acidobacteria, Chlorobi, Chloroflexi, Fusobacteria, Nitrospirae, and Planctomycetes were found in the bathroom, but not in the living room, indicating a broader range of bacteria. However, the living room showed a more diverse range of bacterial genera than the bathroom did. In both the living room and the bathroom, the genus Methylobacterium was dominant.
퇴적층 배양에 따른 식물플랑크톤 군집 형성과 이취미물질 발생 특성
김용진 ( Yong Jin Kim ),윤석제 ( Seok Jea Youn ),김헌년 ( Hun Nyun Kim ),박응로 ( Eung Roh P가 ),황문영 ( Moon Young Hwang ),박진락 ( Jin Rak Park ),이병천 ( Byoung Cheun Lee ),이재관 ( Jae Kwan Lee ) 한국물환경학회 2014 한국물환경학회지 Vol.30 No.6
In this study, Uiam-sediment(US) and Gongji-sediment(GS) were incubated to analyze the formation of phytoplankton community and occurrences of odorous compounds from benthic cyanobacteria. For the phytoplankton, 45 and 40 taxa were found in GS and US, respectively. The phytoplankton species detected in the harmful algae included Microcystis, Anabaena and Oscillatoria. As a result, a standing crop of phytoplankton appeared to be in the range of 0.9∼71.8×103 cells/mL in GS, 0.8∼51.2×103 cells/mL in US, and as the incubation progressed, benthic cyanobacteria was increased. The highest number of akinetes was shown in the initial incubation, and akinetes was reduced by 10% on day 4 of incubation start. After reduction of akinetes incubated for 4 days in US and 15 days in GS, Anabaena appeared from the surface water. Benthic cyanobacteria such as Oscillatoria tenuis, O. limosa and Lyngbya hieronymusii was dominant in GS(max. 3.96×106 cells/cm2) and US(max. 5.77×106 cells/cm2), forming cyanobacterial mats in sediment surface. Cyanobacterial mats were suspended after 10∼12 days incubation in GS and US. Before and after the suspension of cyanobacterial mats, the concentration of geosmin was the highest in GS(115 ng/L) and US(175 ng/L). In the second suspension of cyanobacterial mats in GS, the concentration of 2-MIB was increased to the range of 22~92 ng/L.