생물막여과공정에 의한 고도정수처리시스템 구성에 관한 연구

강용태,양희천,김화석,김경동 동아대학교 환경문제연구소 1999 硏究報告 Vol.22 No.2

This study is to evaluate the characteristics of submerged biofilter process as pretreatment of raw water and alternative advanced water treatment system(AAWTS) composed with bioflitration, post-ozonation and GAC for Nakdong River by comparison of existing advanced water treatment system(EAWS), composed with pre-ozonation, flocculation, sedimentation, sand filtration, post-ozonation and GAC. In the biofiltration process, the removal of turbidity, color, KMnO₄consumption, NH₃-N and UV254 reached 98%, 95%, 70%, 72%, 79% respectively. The stable removal efficiency was obtained by the direct biofiltration after coagulant injection thought the influent was a muddy and highly polluted. The removal efficiency of the alternative advanced water treatment(AAWTS) using biofiltration process for turbidity, color, KMnO₄consumption, NH₃-N and UV254 was reached 98.5%, 98%, 82%, 90%, 92% respectively. It is equivalent to the removal efficiency of existing advanced water treatment system(EAWTS) though the demanded area and coagulant of the alternative advanced water treatment system using biofiltration process was decreased about 60% and 70% respectively.

익수환아의 예후에 영향을 미치는 인자에 관한 연구

김용배,정대봉,조수형,조남수,박영봉,박상기,김춘호,양은석,문경래 大韓應急醫學會 1998 대한응급의학회지 Vol.9 No.3

Drowning is the second most common cause of accidental death of children in Korea. But the study of near-drowning is very rare in Korea. The purpose of our study is to determine the factors that may influence survival on the basis of submersion time, consciousness state upon admission to hospital, the kinds of water, laboratory findings and neurological outcomes. The survey was performed by a retrospective cohort study on 28 near-drowning victims of less than 15 years of age who were admitted to the emergency room in the Chosun University Hospital between May 1988 & May 1997. The results were as follows :1)Sex distribution was 22 males and 6 females. 2) Submersion time was <5 minutes in 9 cases, 5-9 minutes in 6 cases, 10-14 minutes in 5cases, 15-19 minutes in 3 cases, ≥20 minutes in 5cases. 3) Comatose patients upon arrival were 6/7 cases in the death group(86%) and 2/21 cases in the improved group(10%). They had unfavorable outcomes(P<0.05). 4) The first PH value was mean 7.02±0.12 in the death group and mean 7.31±0.13 in the improved group. There was a statistically significant difference between the death and the improved group(P<0.05) 5) The patients who gad increased blood glucose concentration were all 7 cases in the death group and 12/22 cases in the improved group(54%). The mean blood glucose concentration was mean 424.7235.6㎎/㎗ in the death group and mean 140.182.7㎎/㎗ in the improved group. There was a statistically significant difference between the death and the improved group(P<0.05). 6) The patients who had pulmonary edema upon arrival were all 7 cases in the death group and 1/21 cases in the improved group(46%). They had unfavorable outcomes(P<0.05). 7) The patients who had been submerged more than 15 minutes were all 7 cases in the death group and 6/21 cases in the improved group(5%). They had unfavorable outcomes(P<0.05). We conclude that pediatric victims of near-drowning can be assigned to high or low likelihoods of unfavorable our outcomes with the use of five variables ; comatose mentation upon arrival decreased initial blood pH, increased initial blood glucose concentration, pulmonary edema, and maximum submersion time estimated longer than fiften minutes. This prediction rule may be useful if it can be validated in another cohort.

비점막(鼻粘膜) 섬유세포에서의 RANTES와 MCP의 발현 조절

하용찬,조정재,유영처,양원용 Official Journal of the Korean society for immunol 2003 Immune Network Vol.3 No.1

이동통신 멀티미디어 데이터서비스의 트래픽 특성 모델링 및 성능분석

정용주,백천현,김후곤,최택진,양원석,황흥석 한국경영과학회 2003 한국경영과학회지 Vol.28 No.2

The aim of this study is to identify the data traffic capacity of 3G mobile communication networks, especially of cdma2000-1X networks. Three-layered ON/OFF traffic model is used to describe the dynamics of data traffics and the process of data transmission such as packet scheduling. We construct a simulator fully incorporating packet handling process of cdma2000-1X data network as well as three-layered ON/OFF traffic model describing the behavior of source data traffics. To get influence of traffic parameters on performance measures, the extensive simulations were performed for several data sets which are obtained from real trace data or previous studies. The experimental results show that the engineered throughput satisfying QoS criteria is approximately 20% of total capacity. Finally, some proposals to improve the system capacity are followed.

Clomiphene citrate에 의한 배란유도 후의 임신율에 관한 연구

임춘근,이민용,권경익,박세출,이두룡,남동호,양숙경 啓明大學校 醫科大學 1993 계명의대학술지 Vol.12 No.3

From March 1990 to February 1993, we evaluated completely follow-uped 68 cases of amenorrhea, oligomenorrhea, infertility(anovulation). The ratio of primary to secondary is 31: 37. Ovulation rate and pregnancy rate of 68 cases which were completely treated with clomphene citrate is 72%, 71.8% respectively. Among these 23 pregnat cases, 19 cases were full term delivered, 1 case is ongoing pregnant, and 3 cases were spontaneously aborted. No one of multiple pregnancy and congenital abnormality was noted.

축우 부루셀라병의 ELISA 진단법에 관한 연구

임윤규,이두식,박전홍,양기천,김승호,김공식,현관종,김우택,이영순 濟州大學校 農科大學 動物科學硏究所 1993 動物科學論叢 Vol.8 No.1

Enzyme-linked Immuno sorbent Assay (ELISA) for the serological diagnosis oi Bruceiia abortus was developed and compared with plate aggluhnation test Cell wall antigen was extracted from Brucella abortus 1119-3 by sonicabon and with a sodium deoxychlate solution Optimum protein concentra tion of coating antigen 0.4㎍/100㎕ protein on each microtiter plate well. Horse radish peroxidase(HRP) labled protein-G was used as a tracer of reacted antibodies ELISA confirmed the agreeable results of 40 rases out of 43 cases by plate aggulutination test ELISA diagnosed positive cases (10 out of 12) and negatiw cases (1 out of 12) with dubious sera by plate agglutination test From this results EL ISA could be used for the early diagnostic tools of Brucellosis in cattle.

Production of Red Ginseng Specific Ginsenosides $(Rg_2, Rg_3, Rh_1 and Rh_2)$ from Agrobacterium-transformed hairy Roots of Panax ginseng by Heat Treatment

Yang, Deok-Chun,Yang, Kye-Jin,Park, Yong-Eui Korean Society of Photoscience 2001 Journal of Photosciences Vol.8 No.1

It was reported that Red ginseng contains specific ginsenoside-Rg$_2$,-Rg$_3$,-Rh$_1$and -Rh$_2$, which show various pharmacological effects. However, production of these specific ginsenosides from Red ginseng is not commercially applicable because of high cost of the raw material, roots. This work was carried out to examine the production of Red ginseng specific ginsenosides from Agrobacterium-transformed hairy roots. Hairy roots were induced from 3 year-old root segment of Korean ginseng (Panax ginseng C.A. Meyer) after infection with Agrobacterium rhizogenes A4. Among many lines of hairybroots, KGHR-8A was selected. Steam heat treatment of hairy roots was resulted in the changes of ginsenoside composition. Eleven ginsenosides were detected in heat-treated hairy roots but eight in freeze dried hairy roots. In heat treated hairy root, content of ginsenoside-Rb$_1$,Rb$_2$,Rc, Rd, Re, Rf, and Rg$_1$were decreased compared to those of freeze dried hairy roots. However, heat treatment strongly enhanced the amount of Red ginseng specific ginsenogides (ginsenoside-Rg$_2$,-Rg$_3$,-Rh$_1$and -Rh$_2$). Amounts of ginsenoside-Rg$_3$,-Rh$_1$and -Rh$_2$ in heat-treated hairy roots were 2.58, 3.62 and 1.08 mg/g dry wt, respectively, but these were detected as trace amount in hairy roots without heat treatment. Optimum condition of heat treatment for the production of Red ginseng specific ginsenoside was 2 h at 105$^{\circ}C$. This result represents that Red ginseng specific ginsenoside can be producted from hairy roots by steam heat treatment.

Surface-Displayed Porcine IFN-λ3 in Lactobacillus plantarum Inhibits Porcine Enteric Coronavirus Infection of Porcine Intestinal Epithelial Cells

Yong-Shi Liu,Qiong Liu,Yanlong Jiang,Wentao Yang,Hai-Bin Huang,Chun-Wei Shi,Gui-Lian Yang,Chun-Feng Wang 한국미생물·생명공학회 2020 Journal of microbiology and biotechnology Vol.30 No.4

Interferon (IFN)-λ plays an essential role in mucosal cells which exhibit strong antiviral activity. Lactobacillus plantarum (L. plantarum) has substantial application potential in the food and medical industries because of its probiotic properties. Alphacoronaviruses, especially porcine epidemic diarrhea virus (PEDV) and transmissible gastroenteritis virus (TGEV), cause high morbidity and mortality in piglets resulting in economic loss. Co-infection by these two viruses is becoming increasingly frequent. Therefore, it is particularly important to develop a new drug to prevent diarrhea infected with mixed viruses in piglets. In this study, we first constructed an anchored expression vector with CWA (C-terminal cell wall anchor) on L. plantarum. Second, we constructed two recombinant L. plantarum strains that anchored IFN-λ3 via pgsA (N-terminal transmembrane anchor) and CWA. Third, we demonstrated that both recombinant strains possess strong antiviral effects against coronavirus infection in the intestinal porcine epithelial cell line J2 (IPEC-J2). However, recombinant L. plantarum with the CWA anchor exhibited a more powerful antiviral effect than recombinant L. plantarum with pgsA. Consistent with this finding, Lb.plantarum-pSIP-409-IFN- λ3-CWA enhanced the expression levels of IFN-stimulated genes (ISGs) (ISG15, OASL, and Mx1) in IPEC-J2 cells more than did recombinant Lb.plantarum-pSIP-409-pgsA'-IFN-λ3. Our study verifies that recombinant L. plantarum inhibits PEDV and TGEV infection in IPEC-J2 cells, which may offer great potential for use as a novel oral antiviral agent in therapeutic applications for combating porcine epidemic diarrhea and transmissible gastroenteritis. This study is the first to show that recombinant L. plantarum suppresses PEDV and TGEV infection of IPEC-J2 cells.

A Study of the Airport Model Based on Security Risk

Yong-Suk Kang,Yang-Ha Chun,Yong-Tae Shin,Jong-Bae Kim 보안공학연구지원센터 2014 International Journal of Software Engineering and Vol.8 No.11

The recent APT attacks including cyber terror are caused by a high level of malicious codes and hacking techniques. The substantive problem is that there are frequent cases in which accounts are seized by malicious hackers and servers are attacked due to a high dependence on the ID/Password system, or account information is exposed through new malicious codes that are not detected by vaccines. This implies that essentially, advanced security management is required, from the perspective of 5A. According to the consideration and research on the big information Security accident cases that have occurred over the last 5 years, the paralysis of A-Bank networks resulted from the non-observance of account management policy, even though there was an account management process, and the user information leakage of B-Portal was caused by APT attacks using malicious codes, but it could prevent it by using the Multi-Factor certification of users to have access to DB or server using OTP, rather than ID/Password. Also, the customer information leakage of C-Capital wouldn’t occur, if it deleted the accounts of employees who resigned, in accordance with security policy, and the customer information leakage of KT agencies could be prevented in advance through a verification of users and devices of subcontractors. Lastly, the exposure of internal information of the domestic large company, S to North Korea wouldn’t be occurred, if foreign users were not allowed access to particular tasks and networks. The changes of IT environment are represented by Mobile, Cloud and BYOD, and all the devices of IT are being serviced via wired and wireless networks. In this situation, the security model needs to be changed, too into the Airport model which emphasizes prevention, and connection, security and integration of functions from the existing Castle model. The risk-based Airport model consists of 5A (Accounting, Authorization, Authentication, Auditing and Administration), and for applying this model, a preventive process of threatening factors should be designed. This study suggested an application method of the risk-based Airport model to the cyber security environment.

금은화에 대한 최근 10년의 연구 동향

김용 ( Yong Kim ),양수영 ( Su Young Yang ),오영선 ( Young Seon Oh ),이진우 ( Jin Woo Lee ),이용구 ( Yong Koo Lee ),박양춘 ( Yang Chun Park ) 대전대학교 한의학연구소 2010 혜화의학회지 Vol.19 No.1

Objective: The purpose of this report was to provide the information about Lonicera japonica published in Korea during lately 10 years. Methods: Domestic papers related to Lonicera japonica were reviewed and analyzed. These papers were then classified by year, experimental method and subject. Results: The following results were obtained in this study. 1. Thirty nine papers were searched. The studies were completely focused on experimental models. 2. The studies of Lonicera japonica continuously increased during 10 years. 3. The subjects of studies were anti-inflammation, toxicology & liver injury, components analysis & taxology, respiratory disease, dermatology, anti-viral & anti-biotic, anti-oxidant, anti-cancer etc. Conclusion: Lonicera japonica is being used in various ways. However, mechanism study should be conducted at the molecular biology level and more clinical studies on the efficacy of Lonicera japonica are needed.