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카드뮴내성균 (耐性菌) ( Pseudomonas putida ) 에 의한 균체내 카드뮴 축적 기작
허종수,조주식,한문규 ( Jong Soo Heo,Ju Sik Cho,Mun Gyu Han ) 한국환경농학회 1992 한국환경농학회지 Vol.11 No.1
A mechanistic study by which Cadmium-tolerant P. Putida C1 accumulates high conc of Cd in its cell body was performed. Approximately 57% Cd accumulated was distributed on the cell wall and the other 43% portion was in cytoplasm. 84% Cd of the Cd in the cell wall fractions present in the polyphosphate-polysaccharide fractions, but most of Cd in the cytoplasm fraction was in protein and nucleic acid. Cadmium affected the protein synthesis in P. Putida. The intracellular protein content was decreased by cadmium addition, but the soluble protein precipitated by ammonium sulfate(30∼75% satruation) was increased as compared to that from the cells grwon without cadmium. Furthermore, in the cells grown with of cadmium, high-molecular-weight soluble protein was increased, with of cadmium, high-molecular-weight soluble protein was increased, compared with the cells grown without cadmium, but low-molecular-weight soluble protein was decreased. These results indicate that Cd inhibited the intracellular protein biosynthesis but enhance biosynthesis of the high-molecular-weight soluble protein precipitate by ammonium sulfate(30∼75% saturation).
허종수,조주식,이홍재,한문규,임영성,하영래 ( Jong Soo Heo,Ju Sik Cho,Hong Jae Lee,Mun Gyu Han,Yeong Sung Lim,Yeong Lae Ha ) 한국환경농학회 1993 한국환경농학회지 Vol.12 No.3
To develop multifunctional microorganisms for effective wastewater treatment, the cell of P. aeruginosa P1 enable to accumulate lead in its cell were conjugated with the cell of P. fluorescens S1 enable to degrade efficiently synthetic detergents. The plasmids of the P. aeruginosa P1 and the P. fluorescens S1 were found in the cell of the conjugants when determined by agarose gel electrophoresis. The conjugants obtained from P. fluorescens S1 as a recipient cell and P. aeruginosa P1 as a donor cell possessed the ability to degrade synthetic detergents as well as to accumulate lead.
허종수,조주식 ( Jong Soo Heo,Ju Sik Cho ) 한국환경농학회 1994 한국환경농학회지 Vol.13 No.3
As a basic research on applying the microbial strains which had been isolated and proved to remove heavy metals, such as Pb, Cd, Zn, and Cu in This laboratory to actual wastewater treatment, optimum condition of the treatment system with addition of single or multiple species of pollutants and microorganisms were investigated at small scale. Concentration of the bacterial inoculum was 3000㎎/L and 1500㎎/L of MLSS for treatment with single and multiple species, respectively. Removal rates of heavy metals were expressed at HRT`s (Hydraulic Retention Time) of 12, 24, and 48 hr. Removal rates of Pb, Cd, Zn, and Cu after 12 days at HRT of 24hr with addition of single and multiple species were 93%, 90%, 80%, and 39%, and 75%, 90%, 74%, and 48%, respectively. Judging from these results, treatment capability of the isolated strains is excellent. Hence, the microorganisms are expected to be applicable to actual wastewater treatment.
Heavy metal contents in lichen, Usnea aurantiacoatra of King George Island, West Antarctica
Ju Sik Cho(조주식),Hyoun Soo Lim(임현수),Dong-Cheol Seo(서동철),Ji Hee Kim(김지희),Jae Il Lee(이재일),Yang Ju Park(박양주),Jae Seoun Hur(허재선),Yong Hwa Cheong(정용화),Jong Soo Heo(허종수) 한국토양비료학회 2008 한국토양비료학회 학술발표회 초록집 Vol.2008 No.5
허종수(Jong Soo Heo),정태욱(Tae Uk Chung),이홍재(Hong Jae Lee),백송범(Song Bum Baek),조주식(Ju Sik Cho) 한국환경농학회 1999 한국환경농학회지 Vol.18 No.4
To treat livestock wastewater effectively by electrochemical method using a stainless steel electrode or au aluminum electrode, the effects of voltage, distance of electrodes and PACS(Poly Aluminum Chloride Silicate) dosage on removals of pollutants in batch experiment for investigation the optimum treatment conditions of livestock wastewater were investigated. The results were summarized as follows ; On the effect of voltage, temperature and pH in electrochemical reactor were increased with increase in voltage but EC was a reverse in both electrodes. Removals of COD and T-N were increased with increase in voltage in both electrodes. SS removal was greater than 90% regardless of voltage without doing electrochemical reaction over 15min at 20V or 12min at 30V in both electrodes. T-P removal was over 90% regardless of voltage in both electrodes. On the effect of distance between two electrodes, removals of COD, T-N and T-P were increased with closeness in distance between two electrodes, and SS removal was greeter than 90% regardless of distance between two electrodes in both electrodes. On the effect of PACS dosage, removals of COD, T-N and T-P were increased with increased in PACS dosage up to 200㎎/ℓ in both electrodes. SS removal was greater than 90% regardless of PACS dosage in both electrodes.