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연속회분식 반응기를 이용한 축산 폐수의 생물학적 고도 처리 운전 인자 도출에 관한 연구
김창원,최명원,이해군,이해일,하지연 부산대학교 환경문제연구소 1998 環境硏究報 Vol.16 No.-
축산폐수는 고농도의 유기탄소 뿐만아니라 영양염류를 포함하는 대표적인 고농도 폐수이며 적절히 처리되어지지 못할 경우 심각한 담수의 부영양화와 연안의 적조를 야기할 수 있다. 이러한 축산폐수를 보다 경제적이며 기술적으로 처리하기 위해 본 연구에서는 연속회분식반응기(SBR)을 이용한 축산폐수의 고도처리에 적용할 수 있는 운전인자와 운전기법을 연구하였다. 초기 암모니아와 유기탄소부하를 달리하며 정해진 주기로 운전하는 네 가지 전형적인 회분식 실험과 원수를 연속으로 주입하면서 간헐 폭기로 운전하는 세 가지의 변형회분식 반응 실험을 통하여 전형적인 SBR에서 비 질산화 속도에 가장 많은 영향을 미치는 인자가 초기 pH 와 유리 암모니움 농도이며 최적 초기 암포니아성 비 질소 부하율은 0.1 ~ 0.15 kg NH_4^+-N /kg VSS 근처이며 이때 비 질산화율은 0.06 kgNH_4-N/ kg MLVSS·day로 관찰되었으며, 변형 SBR로 운전하는 경우 최소 35%에서 최대 65% 까지 탈질용 외부기질 주입량을 절감할 수 있었다. Piggery wastewater is a representative of high strength wastewater which contents not only high concentration organic carbon but also nutrients. From this reason piggery wastewater could be cause a serious eutrophication of fresh water and red tide in coastal areas if not properly treated. In this study to treat these piggery wastewater technically and more economically, the operation parameters and methods for advanced treatment using Sequencing Batch Reactor (SBR) were investigated. Four sets of experiments were conducted on laboratory scale typical SBR (Fill in a time) with fixed cycle and different till ratio to evaluate most proper initial loading of organic carbon and nitrogen and three sets of experiments on laboratory scale inodified SBR (Fill continuously) with intermittent aeration. As results the nitrification rate was most sensitively affected by intial pH and free ammonia concentration and in typical SBR operation most profit initial specific nitrogen loading were investigate around 0.1~0.15kg NH_4^+-N /kg VSS and in this range the average specific nitrification rate was 0.06 kg NH_4-N/ kg MLVSS·day. And in modified SBR operation with most profit specific nitrogen loading rate the cost of external denitrification cost were saved minimum 35% to maximum 65% each experimental sets.
이만재,유기동,손현화,정재용,김양수,김태균,서영선,박유환,정춘해,이미자,박종,오윤경 조선대학교 부설 의학연구소 1999 The Medical Journal of Chosun University Vol.24 No.2
Purpose: Even though the entire resection is only option for primary cure in case of the localized colorectal cancer. However, recurrence rate is relatively high(30%). The evaluation for chromosome 18 long arm status in the patients who have stage II colon cancer gives a important information about a prognosis and evaluation of the patients. This study was undertaken to evaluate the possible prognostic role of the expression of deleted in colorectal cancer (DCC) protein in the patients with stage II colon cancer. Materials and Methods: The present study analysed 22 patients with stage II &II (AJC TNM 1992 classification) colorectal adenocarcinoma who were admitted to the Chosun University Hospital between March 1989 and February 1992. Clinicopathologic parameters including age, sex, TNM stage, adjuvant chemotherapy, location and tumor differentiation and DCC status were examined. Results: The survival rate of the patients expressing DCC was found to be significantly higher in the patients in whom the DCC was expressed, while 4 (18%) in the other who had not the expression of DCC(P= 0.044). Although the patients with the stage II of the TNM stage have a better prognosis than those with stage III (P=0.046), no significant difference was found between these two groups in terms of the eastern cooperative oncology group (ECOG) performance status of patients (P= 0.525). Conclusion: when the expression of DCC protein is negative in patients with colon cancer staged II need a more aggressive treatments like in the patients with staged III colon cancer and thereafter the more exact operative method is required identifying the expression of DCC protein using the frozen biopsy during operation and thereafter the consideration for the chemotherapy and radiation therapy will be possible.
Effect of Liuweidihuang-tang on Alcohol-induced Decrease in New Cell Formation in Rat Dentate Gyrus
Bahn Goon Ho,Yoon Doh Joon,Park Jin Kyung,Lee Taeck Hyun,Jang Mi Hyoon,Shin Min Chul,Kim Chang Ju,Paik Eun Kyung,Park Jae Hyung,Cho Son Hae,Lee Choong Yool The Physiological Society of Korean Medicine and T 2002 동의생리병리학회지 Vol.16 No.5
Liuweidihuang-tang has been traditionally used for the treatment of delayed mental and physical development in children, complications of diabetes. and glomerulonephritis. In the present study, the effect of Liuweidihuang-tang on cell proliferation in the dentate gyrus of alcohol-intoxicated Sprague-Dawley rats was investigated via 5-bromo-2' -deoxyuridine (BrdU) immunohistochemistry. Alcohol administration was shown to decrease the number of BrdU-positive cells in the dentate gyrus, while Liuweidihuang-tang treatment increased new cell formation in the dentate gyrus under normal conditions and alcohol intoxication. It was thus demonstrated that aqueous extract of Liuweidihuang-tang exerts a protective effect against alcohol-induced decrease in new cell formation.
Ki-Hoon Song,Dae-Hae Song,Jeong-Ran Lee,Goon-Bo Kim,Hong-Kyu Choi,R. Varma Penmetsa,Young-Woo Nam 韓國作物學會 2007 Korean journal of crop science Vol.52 No.4
To tolerate environmentally adverse conditions such as cold, drought, and salinity, plants often synthesize and accumulate proline in cells as compatible osmolytes. δ1 -Pyrroline-5-carboxylate synthetase(P5CS) catalyzes the rate-limiting step of proline biosynthesis from glutamate. Two complete genes, MtP5CS1 and MtP5CS2, were isolated from the model legume Medicago truncatula by cDNA cloning and bacterial artificial chromosome library screening. Nucleotide sequence analysis showed that both genes consisted of 20 exons and 19 introns. Alignment of the predicted amino acid sequences revealed high similarities with P5CS proteins from other plant species. The two MtP5CS genes were expressed in response to high salt and low temperature treatments. Semi-quantitative reverse transcription-polymerase chain reaction showed that MtP5CS1 was expressed earlier than MtP5CS2, indicating differential regulation of the two genes. To evaluate the reverse genetic effects of nucleotide changes on MtP5CS function, a Targeting Induced Local Lesions in Genomes approach was taken. Three mutants each were isolated for MtP5CS1 and MtP5CS2, of which a P5CS2 nonsense mutant carrying a codon change from arginine to stop was expected to bring translation to premature termination. These provide a valuable genetic resource with which to determine the function of the P5CS genes in environmental stress responses of legume crops.
姜龍澈(Yong-Cheol Kang),李知勳(JI-Hoon Lee),姜海權(Hae-Gweon Kang),張成一(Sung-Il Jang),金容均(Yong-Gyun Kim),朴君哲(Goon-Cherl Park) 대한전기학회 2008 전기학회논문지 Vol.57 No.12
A doubly-fed induction generator (DFIG) system has been widely used in the modem wind turbines due to variable-speed operation, high efficiency and small converter size. It is well known that an inter-tum fault of a generator is very difficult to be detected. The DFIG system uses a wound rotor induction machine so that the magnetizing current of the generator can be fed from both the stator and the rotor. This paper proposes a protection algorithm for a DFIG using the d-q equivalent circuit in the time domain. In the case of a DFIG, the voltages and currents of the rotor side as well as the voltages and currents of the stator are available. The proposed algorithm estimates the instantaneous (i.e., converted into the stationary frame) induced voltages from the rotor and the stator sides. If the difference between the two estimated induced voltages exceeds the threshold, the proposed algorithm detects the inter-turn fault. The algorithm can detect a inter-turn fault of a winding. The performance of the proposed algorithm is validated using a PSCAD/EMTDC simulator under inter-turn fault conditions and normal operating conditions such as an external fault and the change of the wind speed.
Song, Ki-Hoon,Song, Dae-Hae,Lee, Jeong-Ran,Kim, Goon-Bo,Choi, Hong-Kyu,Penmetsa, R. Varma,Nam, Young-Woo The Korean Society of Crop Science 2007 Korean journal of crop science Vol.52 No.4
To tolerate environmentally adverse conditions such as cold, drought, and salinity, plants often synthesize and accumulate proline in cells as compatible osmolytes. ${\Delta}^1$-Pyrroline-5-carboxylate synthetase(P5CS) catalyzes the rate-limiting step of proline biosynthesis from glutamate. Two complete genes, MtP5CS1 and MtP5CS2, were isolated from the model legume Medicago truncatula by cDNA cloning and bacterial artificial chromosome library screening. Nucleotide sequence analysis showed that both genes consisted of 20 exons and 19 introns. Alignment of the predicted amino acid sequences revealed high similarities with P5CS proteins from other plant species. The two MtP5CS genes were expressed in response to high salt and low temperature treatments. Semi-quantitative reverse transcription-polymerase chain reaction showed that MtP5CS1 was expressed earlier than MtP5CS2, indicating differential regulation of the two genes. To evaluate the reverse genetic effects of nucleotide changes on MtP5CS function, a Targeting Induced Local Lesions in Genomes approach was taken. Three mutants each were isolated for MtP5CS1 and MtP5CS2, of which a P5CS2 nonsense mutant carrying a codon change from arginine to stop was expected to bring translation to premature termination. These provide a valuable genetic resource with which to determine the function of the P5CS genes in environmental stress responses of legume crops.