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CMAS公法에 있어서 固定 및 回轉媒體를 利用한 染色廢水의 處理에 關한 硏究
閔庚碩,金弘泰,都仲鎬 경북대학교 산업기술연구소 1990 産業技術硏究誌 Vol.18 No.-
The purpose of the research is determination of the substrate removal efficiencies and sludge productions in complex dyeing wastewater treatment using the Fixed/Submerged Moving Media Complete Mixing Activated sludge(CMAS) process. Laboratory scale CMAS reactors were operated with the organic loading rates from 0.38 to 1.07㎏BOD/㎥/day. The sludge productions were similar in both the fixed and submerged moving media systems. During operating periods the sludge was removed periodically in fixed media system, yet not removed in submerged moving media.
閔庚碩,安榮浩,金弘泰 慶北大學校 1992 論文集 Vol.52 No.-
For the effective management of industrial wastes, it is necessary to evaluate these characteristics. This analytical investigations were carried out to study on the characteristics of industrial wastes in Taegu and Kyungpook region. In order to carry out this study, the basic data were collected from Ministry of Environment, a Statistical Yearbook of Korea, and the Taegu Chamber of Commerce and Industry. The conclusions from this study are as follows: 1) Total number of generation companies and generation quantity of industrial wastes were 2, 199 and 7,599,913 ton/year (about 20,822 ton/day) respectively. Among them, specified and general wastes were 3.1% and 96.9% respectively. 2) The self-disposal, commission disposal and storage for industrial wastes were 56.9%, 411.1% and 2.0% respectively. 3) The future generation quantity of industrial wastes was calculated with the future production rate of generation companies. In 2005, the generation quantities of industral wastes are 16,970,832 ton/year, and the disposal requirement are 12,646,259 ton/year.
閔庚碩 경북대학교 산업기술연구소 1987 産業技術硏究誌 Vol.15 No.-
This analytical investigations was carried out to study on the characteristics of municipal solid wastes generated from various sources in Taegu city. In order to do this, the bulk of two or three days refuses was collected from Taegok landfill site in Taegu city, and seperated to respectively measure in ten kinds of compositions, such as papers, garbage, plastics, wood, briquette ash, etc., by hand-sorting. Furthermore each sample was analyzed to find out the physical properties such as moisture content, combustible material content, ignition residue and heat values.
閔庚碩,金弘泰,姜玉熙 慶北大學校 1991 論文集 Vol.51 No.-
This study was conducted to show the possibility of application of anaerobic digestion process in low temperature. Laboratory single-stage anaerobic digester was operated at 15 to 80 days' HRT at the temperature of 15℃, 20℃, 25℃ and 35℃. The results of this study indicated that the organic removal efficiencies and gas productions were remarkably decreased in low temperature. Despite of the low organic loading of 0.67 ㎏-COD/㎥·day at 15℃ the gas production was very poor as 0.16㎥CH_4/㎏COD removed. The observed maximum F/Mv ratio which would get the organic removal efficiencies of 70% and 60% respectively at the temperature of 20℃ and 15℃ were 0.1 ㎏COD/㎏MLVS·day. The substrate removal rates(Km) had a tendency to become larger at higher temperature, and were critical at the temperature of 20 to 25℃.
망막아세포종 세포주(Y-79)의 Arylalkylamine N-acetyltransferase 활성에 미치는 Dopamine의 영향
김석민,정미영,윤경식,진병관,백행운,백형환,조용호 慶熙大學校 1997 論文集 Vol.26 No.-
The arylalkylamine N-acetyltransferase(AA-NAT, EC 2.3.1.87) in vertebral pineal gland and retina is rate-limiting enzyme in the pathway of biosynthesis of melatonin. AA-NAT activities are remarkably increased during night with 10-150 folds. Neurohormone melatonin is thought to play roles in a broad range of physiological functions in human, primarily through effects on the biological clock in the suprachiasmatic nucleus of the hypothalamus, This rhythm reflects large changes in the activities of AA-NAT. So the important regulatory role of AA-NAT has made it central interest in research on melatonin biochemistry and neurochemical signal transduction. The neurotransmitter that regulates the AA-NAT activities is norepinephrine, which acts through a cyclic AMP mechanism. The effect of dopamine on AA-NAT in human retinoblastoma Y-79 cells was studied. the obtained results are as follows; AA-NAT activities in Y-79 cells were increased by cyclic AMP, and dopamine inhibited the AA-NAT activities stimulated by forskolin. The pattern of inhibition of dopamine on the AA-NAT activities in Y-79 cells was time and concentration dependent. The results suggest that dopamine participates in the regulation of the AA-NAT activities through the inhibitory mechanism in the human pineal and retinal tissues.
Anodonta woodiana hukudai MODELL의 生活史에 關한 硏究
崔信錫,吳炅煥,崔申洙 충남대학교 자연과학연구소 1980 學術硏究誌 Vol.7 No.1
The life cycle of fresh water bivalve, Anodonta woodiana hukudaz, was investigated at the tributary of the Dongjin River, Buan-Kun, Chunlabuk-Do from September 1978 to August 1979. 1. A woodiana hukudai was one of the summer breeders, whose breeding phenomenon was observed from February to August, 1979. The highest rate of Its breeding was observed in June. 2. Fish species infected with glochidia of A. woodiana hukudai were Oryzias latipes, Carassius carassius, Morco oxycephalus, Pseudoperilampus uyekii, and Zacco platypus. The most common species infected with glochidia was O. latipes. 3. The highest rate of infection with glochidia was observed on O. latipes from June 5 to June 20, 1979. Its infection rate was 20.4- 32.1 %. 4. Most glochidia of A. woodiana hukudai were found on the pectoral 2nd caudal fin of O.latipes. The average number of glochidia was 3.1 per fish
海水汚染 指標種으로서의 Heminerita japonica에 關하여
崔信錫,辛昌男,吳炅煥 충남대학교 자연과학연구소 1980 學術硏究誌 Vol.7 No.2
Gastropoda communities were examined to determine the indicators as sea-water pollution in the tidal zone of Inchon and Yongyoudo. Among the factors of sea-water qualities, BOD was 22.42±8.77 ppm and showed higher values than the limiting values of pollution, 5-10 ppm in Inchon Individual number of Heminerita japonica was negatively correlated to the values of BOD.