수리학적 체류시간에 따른 폐활성슬러지의 혐기성 소화 특성

김성순,김갑진,탁성제,김운공 중앙대학교 기술과학연구소 1997 기술과학연구소 논문집 Vol.27 No.-

본 연구는 혐기성 소화 특성을 알아보기 위하여 2차 슬러지를 대상으로 수리학적 체류시간 (Hydraulic Retention Time, HRT)에 따른 유기물 제거효과, 가스발생량 및 탈수특성등을 위한 증온 혐기성 소화실험을 수행하였다. 유기물 제거효율은 HRT에 비례하여 계속 증가하는 경향을 나타내었다. 가스 및 메탄가스 발생량은 HRT가 15이로 증가할 때 까지는 계속 증가하다가 20일에서 오히려 감소하는 경향을 나타내었는데, 이는 유기물의 제거율이 다소 둔화되면서 가스로 전환되지 않고 소화조내에 그대로 축적되었기 때문이라고 판단된다. 한편 슬러지 탈수성은 HRT 증가에 따라 양호해졌다. 상기의 결과로 2차 슬러지의 혐기성 소화시 HRT는 15일에서 유입 VS부하율이 1.09kg VS/㎥/d일 때 가장 좋은 소화 효율을 나타냄을 알 수 있었다. The objectives of this study are to investigate the effect of organic removal and the dewaterability of sludge with Hydraulic Retention Time(HRT) using secondary sludge and estimate anaerobic digestion kinetic coefficient of microorganism. As the results of tests, the efficiency of organic removal increased gradually as the HRT was increased. And gas and methane gas production was increased until HRT got to 15 days. However, at HRT 20days it was significantly lower than HRT 15days. It means that a portion of removal organic matters were accumulated in digester without gasification. In the results of value of specific resistance, dewaterability of sludge was increased proportionally as HRT increased. From the above results, on mesophilic anaerobic digestion of waste acivated sludge, the optimum digestion efficiency was found at HRT 15days with VS loading rate of 1.09 kgVS/㎥/d.

오존수 처리가 콩나물의 부패 및 생육에 미치는 영향

김순동,김일두,김미경,이상갑,민경섭 대구효성가톨릭대학교 식품과학연구소 1997 식품과학지 Vol.9 No.-

오존수 처리가 콩나물의 부패 및 생육에 미치는 효과를 조사하기 위하여 실험 제작한 오존발생장치를 이용하여 콩나물 재배시 수침시의 콩의 세척과 재배중에 오존수로 주수한 결과를 요약하면 다음과 같다. 본 연구에서 개발된 콩의 세척장치와 그 부품을 이용하여 대두량에 대하여 0.5~2.0ppm으로 3시간 처리한 콩으로서 콩나물을 재배하면, 콩의 표면에 오염된 잔류농약이 80~100%까지 분해되었고 콩 g당 10^7정도 오염되어 있는 미생물이 10^3이하로 크게 감소되어 재배중에 부패율은 무처리 경우 10%에서 2%로 현저히 감소되었다. 또, 오존수 주수장치를 이용하여 콩나물재배시에 오존수를 0.5~2.0ppm으로 주수한 결과 부패율을 0%로 낮출 수 있었다. 뿐만 아니라 오존수로 재배한 콩나물은 수율이 증대되었을 뿐만 아니라 비린내가 현저하게 줄었고, 색상과 광택이 양호하였으며, 잔뿌리가 적었다. This study was conducted to investigated the effect of ozone treatment on putrefaction and growth of soybean sprouts ozone was produced using a Hi-Tech ozonator and measured by ozone monitor(Switzerland, Model 3600 analyzer). The soybeans were washed and grown by ozone treatment. The soybeans were exposed to aqueous solutions of ozone at 0.5~2.0ppm for 3 hours. In this ozone treatment, the great decrease in the number of total microbes of soybeans were showed to about 99%. The pesticide residues remained soybean surface were also estimated to 80~100%. The putrefaction of control soybeans during germination was greatly decreased from 10% to 2%. And, that of soybean sprouts was decreased to 0%. The increase of yield, decreases of fish flavor and number of lateral root, and improvement of colour and glaze for soybean sprouts were showed.

다단계 생산로트크기 결정문제의 분석과 단순화 방법

김갑환,박순오 한국경영과학회 1999 韓國經營科學會誌 Vol.24 No.4

When we try to design a production planning system for a manufacturing company, it is a time consuming task to analyze various planning activities and identify inter-relationship among a lot of decisions made for the production planning. Most of the research efforts have been concentrated to well-organized independent decision-making problems that may usually be identified only after analyzing the characteristics of the decision-making process as a whole in this paper, a methodology is suggested to characterize the whole process of the production planning for a manufacturing company and reduce the complexity of decision-making problem. The methodology is based on an experience of developing a production planning software for an automobile component manufacturer in Korea. First, it is explained how to identify and represent the dependency among various decision-making variables. And a methodology is proposed to analyze the identified dependency among decision variable and identify decision-making process. Lastly, a practical example is provided to illustrate the analysis procedure in this paper.

조세혜택 측정치로서 유효법인세율에 대한 비판적 검토

김기웅,김갑순 한국항공대학교 경영연구소 1999 경영연구 Vol.6 No.1

The conceptual definition o f the ETR is being the mtio of taxes to pre-tax economic income. This ratio is intended to reflect each firm's tux burden and thus, its relative tax (dis)advantage, regardless of its production, investment, and finaning policies, or the nature of the tax subsides that produce its tax (dis)advantages. Studies using the average effective tax rate(ETR) to measure corporate tax (dis)advantage have played a critical role in tax legislation Recent research, however, has questioned the effectiveness of the ETR for this purpose. In this study we assess the availability and reliability of the ETR as a measure of tax (dis)advantage. Our critical assessments of this measure emphasize mther imperfections of the empirical measures of the ETR than the functional anomalies associated with its use as an indimtor of crass-firm differences in tax (dis)advantage. In conclusion, this study demonstrates that reliance on the ETR may be misplaced bemuse of limited availability and reliability as an indimtor of relative tax (dis)advantage. So, empirical results using ETR should be interpreted very carefully and alternative statistics, such as TSE, TCR, should be developed continuously.

제왕절개 자궁적출수술의 임상적 고찰

정갑인,남계현,이해혁,이순곤,이권해,김동희 순천향의학연구소 1997 Journal of Soonchunhyang Medical Science Vol.3 No.2

Objective: This study was evaluated twenty-six cases of emergency Cesarean hysterectomy to analyse incidence, age distribution, parity, indications, complications, amount of blood transfusion and fetal morbidity. Methods and Materials : This study was carried out on twenty-six cases who underwent emergency Cesarean hysterectomy at department of obstetrics and gynecology, Soonchunhyang University Hospital from January 1987 to November 1997. Results: 1. The incidence of Cesarean hysterectomy was perfomed in 26 cases among total 19,277 deliveries(0.1%). 2. The indications of Cesarean hysterectomy were uterine atony, placenta previa, adhesive placenta and bleeding tendency. 3. There was matenal death in one case and main cause of death was massive bleeding due to disseminated intrabascular coagulopathy. 4. The complications of Cesarean hysterectomy were disseminated intravascular coagulopathy, bladder injury, postoperative infection, wound disruption and postoperative hemoperitoneum. 5. Two cases of fetal and neonatal mortality were intrauterine fetal death and neonatal death. Conclusion : The incidence of Cesarean hysterectomy was increased by increasing parity and maternal age.

1차원 random media에서 Random walk에 관한 연구

黃甲淳,金慶植 釜山水産大學校 1987 釜山水産大學 硏究報告 Vol.27 No.1

The random walk can be described by the master equation in one-dimensional random media. We study both numerically and analytically the long time asymptotic behavior of the first moment, for the model systems of discrete-time and continuous-time random walks characterized by the transition probability density in the case of nearest neighbor transition. The results of our Monte Carlo method are also showed.

Vibrio parahemolyticus에 대한 한방처방 [方藥合編] 및 그 단미제의 항균활성에 관한 연구

마진열,김진숙,신순식,정규용,박갑주 한국한의학연구원 1999 한국한의학연구원논문집 Vol.5 No.1

Vibrio are become prevailing if superficial temperature of ocean is raised and their activities of area are expanded and most of ocean creatures (fishes, oysters etc) are polluted with vibrio. The one who has taken these polluted fishes and aysters uncooked caused foodpoisoning and diarrhea from Vibrio. Frequencise of these diseases breakout is disposed in westsea shore of Korea. According to ancient and traditional Korean medical book -『Bangyak Happyeon』(Collection of Local Medicines, 1884) - and their single prescibes, we carried out experiment check the activities of natural medicinal effects on Vibrio parahemolyticus. The prescriptions of trial materials are processed from extraction boiling water and 80% methanol and followed freeze dried and adsorbed to every discs in dosage of 10mg. Gentamycin of 10mg were used for control. The result of compound prescription displayed special diseases in antimicrobial activities of boiling water and MeOH extraction compared with control. In compound prescription, extraction MeOH of Sashinhwan(clear zone : 17mm) presented extraordinaire antimicrobial activity. In single prescription, extraction of boiling water (clear zone : 16mm) and MeOH(clear zone : 18mm) of Fructus Chebulae presented extraordinaire antimicrobial activity. The MBC of Fructus Chebulae extracts was expressed in boiling water (1.28mg/ml) and MeOH(0.64mg/ml).

Antiviral Activity of Antibiotic Peptaibols,Chrysospemins B and D,Produced by Apiocrea sp.14T against TMV Infection

KIM, YOUNG HO,YEO, WOON-HYUNG,Kim, Young Sook,Chae, Soon Yong,Kim, Kap Sik 한국미생물 · 생명공학회 2000 Journal of microbiology and biotechnology Vol.10 No.4

A total of about 300 fungal isolates from forest habitats were screened for inhibitors of tobacco mosaic virus (TMV) infection using its local lesion host, Nicotiana tabacum cv. Xanthi nc. One of the isolates, 14T, showed a strong activity against TMV infection, and was identified as an Apiocrea sp. based on its morphological characteristics. Rice was an optimum culture medium for its fermentation, and two antiviral compounds, KGT 141 and KGT 142, were resolved from the rice culture through column chromatography, TLC, and HPLC. By NMR and FAB-MS, the two compounds were identified as chrysospermins B (KGT141) and D (KGT142), both of which are peptaibols with 19-mer amino acids possessing an acetylated N-terminus and a hydroxy-amino acid (tryptophanol) at the C-terminus. Both compounds showed inhibitory activities against TMV infection, but chrysospermin D showed the stronger activity than chrysospermin B. The former exhibited 96.3% of TMV-inhibitory efficacy at the concentration of 100㎍/㎖ and 54.7% at 10㎍/㎖, respectively. Furthermore, the chrysospermins were highly cytotoxic toward cancer cell lines of PC-3 (prostrate) and K562 (leukemia), and inhibited growth of the Gram-positive bacteria tested, especially the plant pathogenic bacterium Corvnebacterium lilium. To the best of our knowledge, this is the first report on the inhibition of plant virus infection by antimicrobial peptaibols.

Monitoring of the elite seed potatos produced in year 2010 for viral infection

Soon Kap Kim,Jae Whune Kim,Jeong Kook Kim 한국육종학회 2010 한국육종학회 학술발표회 발표요지 Vol.42 No.1

Subwavelength localization and toroidal dipole moment of spoof surface plasmon polaritons

Kim, Seong-Han,Oh, Sang Soon,Kim, Kap-Joong,Kim, Jae-Eun,Park, Hae Yong,Hess, Ortwin,Kee, Chul-Sik American Physical Society 2015 Physical review. B, Condensed matter and materials Vol.91 No.3