한국비서자격시험의 개선점과 비교연구

남자현,이미정,이미영,이아영,정해금,최유정,이미숙,전인선,정혜림 이화여자대학교 법정대학 비서학과 1997 비서학연구 Vol.- No.17

駕莫灣內 細菌 Flora의 季節的 變動에 關한 硏究: 1. 病原 Vibrio와 Salmonella에 關하여

Suk U SHIN(申錫雨),Wun Wha JEONG(丁云華),Tai Jung KANG(姜泰中),Sung Koo KANG(姜聖求) 전남대학교 수산과학연구소 1992 수산과학연구소논문집 Vol.1 No.-

都市下水 및 工場廢水 流入으로 인한 生物棲息環境의 惡化로 生態界에 莫大한 支障을 招來하고 있는 駕莫灣海域의 微生物群集 특히 病原 Vibrio 와 病原腸內 細菌을 調査하여 이들 細菌과 水域生態界와의 相互 關聯性을 解析하고저 下水流入海域과 淸淨海域을 中心으로 調査하여 다음과 같은 結果를 얻었다. 駕莫灣內 海水溫度는 8月에 29.5℃ 가장 높았고 冬季에는 10℃이하였다. 病原 Vibrio의 水系에 따른 生菌數는 淸淨海域(A)이 5月에 出現하여 9月에 3.2×10²/ml로 나타났고 汚染海域(C,D)에서는 4月에 出現하여 7~9月에 1.2×10²~1.7×10³/ml였고 病原腸內細菌은 淸淨海域에서 6月, 汚染海域에서 3月에 出現하였으며 各各 9月에 1.3×10²/ml, 6.2×10²/ml의 生菌數가 檢出되었다. 分離菌株에 對한 同定結果는 病原 Vibrio 屬 139 菌株中 V.parahaemolyticus 가 48菌株로 62.3%, V. fluvialis 가 24菌株로 17.3% 同定되어 이들 두 菌株가 病原 Vibrio 屬中 優点種이었고 病原腸內細菌은 分離菌 122菌株中 Salmonella 屬이 43菌株로 35.2% 檢出되었고 이 가운데서 Sal. typhi 가 24菌株로 55.8%, Sal. paratyphi-C가 10菌株로 23.3%를 차지하였다. Kamak bay is the very important sea area in which have been producing not only fish but shellfish. But recently this bay is showing the tendency contaminated by domestic sewage and industrial waste-water. Therefore in order to investigate for bacteria in the contaminated environment to give what kind of influence on an ecosystem of microorganism, the distribution and bacteriological characteristics of the pathogenic Vibrio and Enterobacteriaceae were investigated as follows : The temperature of sea water in Kamak bay was the highest temperature when it was 29.5℃ in August and it was less than 10℃ during winter season. The viable cell counts of pathogenic Vibrio in the clean and the contaminated sea area appears for the first time in May and April, respectively. The former was 3.2×10² per ml in September and the latter was 1.2×10² 1.7×10³ per ml during July and September. Those of pathogenic Enterobacteriaceae appears in June in the clean sea area and in March in contaminated sea area. Each of them in both areas were 1.3×10²and 6.2×10²per ml in September. Showing the indentification result of 139 strains isolated into genus Vibrio from each samples, V.parahaemolyticus and V.fluvialis were 62.3% and 17.3%, respectively. Among 122 stains isolated into Enterobacteriaceae by MacConky agar, genus Salmonella was 35.2% and among this genus Sal.typi(55.8%) and Sal.paratyphi-C(23.3%) were the predominant species.

Channel Allocation Based on Traffic Locality in Multichannel High Speed Network

Sun U. Paek,Chong S. Kim,Hyun K. Kahng,Jung B. Suk,Chu H. Yim 대한전자공학회 1992 JC-CNSS : Joint Conference on Communications, Netw Vol.5 No.-

경화 거동에 따른 다기능 구조 전해질의 전기적 기계적 특성 연구

권숙진 ( Suk Jin Kwon ),최우혁 ( U Hyeok Choi ),정병문 ( Byung Mun Jung ),김양도 ( Yang Do Kim ),이상복 ( Sang Bok Lee ) 한국복합재료학회 2016 Composites research Vol.29 No.6

최근에는 이온 전도도의 감소없이 높은 기계적 물성을 가진 구조 복합재를 개발하기 위하여 에폭시 매트릭스를 기반으로 하여 전해질을 함유한 다기능성 구조 전해질에 대한 연구가 활발히 진행 중이다. 구조 전해질의 최적 함량 및 소재 선정에 대해서는 많이 연구되고 있는 반면, 경화 거동에 따른 특성 분석에 관한 연구는 더디게 진행되고 있기 때문에 본 연구에서는 구조 성능과 에너지 저장 성능을 동시에 가진 고체 전해질을 함유한 에폭시 기반의 구조 전해질을 다양한 경화 시간 및 온도에 따라 제조하고 기계적 특성 및 이온 전도도 특성을 측정하였다. 그리하여 전해질의 열 분해가 일어나지 않는 온도 범위 내에서 에폭시가 충분히 경화할 수 있는 경화 조건을 통해 115 MPa와 6 × 10^-5S/cm의 값을 동시에 가지는 구조 전해질을 얻었다. Recently, many research groups have studied on the epoxy-based multifunctional electrolyte to develop the structural composite bearing high mechanical properties without sacrificing the ionic conductivity at the same time. The studies on the optimal content and material selection for structural electrolyte have been published, while its curing behavior has not much analyzed yet. In this study, epoxy-based structural electrolyte containing solid electrolyte was prepared by varying the curing temperature and time. In addition, the ionic conductivities and mechanical properties of specimens were measured. We also find out the optimal hardening condition where the epoxy domain enables to be hardened within the range of temperature at which the thermal decomposition of electrolyte does not occur. Finally, we propose the multifunctional structural electrolyte showing achievable electrical and mechanical properties (282 MPa and 9 × 10^-6S/cm@25℃.

Multifunctional Epoxy-Based Solid Polymer Electrolytes for Solid-State Supercapacitors

Kwon, Suk Jin,Kim, Taehoon,Jung, Byung Mun,Lee, Sang Bok,Choi, U Hyeok American Chemical Society 2018 ACS APPLIED MATERIALS & INTERFACES Vol.10 No.41

<P>Solid polymer electrolytes (SPEs) have drawn attention for promising multifunctional electrolytes requiring very good mechanical properties and ionic conductivity. To develop a safe SPE for energy storage applications, mechanically robust cross-linked epoxy matrix is combined with fast ion-diffusing ionic liquid/lithium salt electrolyte (ILE) via a simple one-pot curing process. The epoxy-rich SPEs show higher Young’s modulus (<I>E</I>), with higher glass transition temperature (<I>T</I><SUB>g</SUB>) but lower ionic conductivity (σ<SUB>dc</SUB>) with a higher activation energy, compared to the ILE-rich SPEs. The incorporation of inorganic robust Al<SUB>2</SUB>O<SUB>3</SUB> nanowire simultaneously provides excellent mechanical robustness (<I>E</I> ≈ 1 GPa at 25 °C) and good conductivity (σ<SUB>dc</SUB> ≈ 2.9 × 10<SUP>-4</SUP> S/cm at 25 °C) to the SPE. This suggests that the SPE has a bicontinuous microphase separation into ILE-rich and epoxy-rich microdomain, where ILE continuous conducting phases are intertwined with a sturdy cross-linked amorphous epoxy framework, supported by the observation of the two <I>T</I><SUB>g</SUB>s and low tortuosity as well as the microstructural investigation. After assembling the SPE with activated carbon electrodes, we successfully demonstrate the supercapacitor performance, exhibiting high energy and power density (75 W h/kg at 382 W/kg and 9.3 kW/kg at 44 W h/kg). This facile strategy holds tremendous potential to advance multifunctional energy storage technology for next-generation electric vehicles.</P> [FIG OMISSION]</BR>

Bacillus magaterium에 의한 Alkaline protease의 생산 조건

신석우 ( Suk U Shin ),권미애 ( Wi Ae Kwon ),장미순 ( Mi Soon Jang ),정규진 ( Kyoo Jin Jung ),서호준 ( Ho Joon Seo ) 한국식품저장유통학회 ( 구 한국농산물저장유통학회 ) 2004 한국식품저장유통학회지 Vol.11 No.2

여수연안 및 동중국해의 세균상: 분리균의 수평분포

신석우 ( Suk U Shin ),정규진 ( Kyoo Jin Jung ) 한국수산학회 1996 한국수산과학회지 Vol.29 No.1

1992년 8월 6일부터 8월 14일 까지에 걸쳐 조사한 동중국해와 여수 연안에서 분리한 세균상은 174균주, uibrio spp. 132균주, 대장균군 183균주에 대한 분리동정 결과는 다음과 같다. 1. 동중국해 세균상은 분리균 74균주중 40균주가 Pseudomonas spp. (54%)였고, 여수 연안에서는 분리균 100균주중 60균주가 Enterobacteriaceae (60%)였다. 2. Vibrio spp.는 동중국해에서 분리된 5균주중 V. alginolyticus가 4균주, V. parahaemolyticus가 1균주 밖에 분리되지 않았고, 여수 연안에서는 127균주중 V alginolyticus가 54균주로 42.5%를 차지 하였으며,V. parahaemolyticus는 21균주로 16.5%를 차지하여 이들 두 균종이 Vibrio의 우점종이였다. 3. 대장균군은 동중국해에서 분리한 27균주중 E. coli I이 3균주, C. freundii I이 1균주였고 여수연안에서는 분리균 156균주중 E. coli I이 79균주 (50.6%)였고 C. freundii I, II가 각각 1균주였다. 4. 대장균군의 IMViC system, 44℃의 발육, gelatin 액화 실험에 의해 16균형으로 분별 되었고 비동정균은 8~16균형으로 분리균 183균주중 99균주로 54%를 차지하였으며 5. 5℃에서 발육 가능한 저온성 대장균군은 15균주였다. The results identified for bacterial flora 174, Vibrio spp.132, and coliform group 183 strains isolated from the areas of East China Sea and Vosu coastal sea during from August 6th. to 14th. 1992 were as follow: 40 strains among the 74 strains of bacteria flora isolated from East China sea area were Pseudomonas spp.(54%) and 60 strains among the 100 strains isolated from Vosu sea area were Enterobacteriaceae (60%). Four strains were Vibrio alginoliticus and one strain of V. parahaemolyticus among 5 strains of genus Vibrio isolated from East China Sea. While 54 strains were V. alginolyticus(43%) and V. parahaemolyticus (17%) among 127 strains genus Vibrio isolated from Yosu coastal sea area. Seventy nine strains among the 156 strains of coliform group isolated from Yosu sea area were Escherichia coli I (51%) and each one strain Citrobacter freundii I and II. 3 strains among 27 strains isolated from East China sea area were E. coli (11%) and 1 strain of C. freundii I. Coliform group was grouped into 16 types by IMViC system, 44℃, gelatin liquefaction test.

하지 정맥류의 외과적 치료로서 광투시 전동형 정맥제거술의 장점

서우형,류동도,조민영,정석인,최상용,서성옥,김영철,구범환,황정웅 대한혈관외과학회 2003 Vascular Specialist International Vol.19 No.1

여수연안 및 동중국해의 세균상: 3. 분리균중 protease 생산균의 동정 및 효소생산조건

신석우(Suk U Shin),정규진(Kyoo Jin Jung) 전남대학교 수산과학연구소 1996 수산과학연구소논문집 Vol.5 No.-

During 6th~14th August 1992, 23 strains having protease activity were isolated from East China sea. Two strains(F₄-188 and F₄-193) that protease activity is the most strong were seleted by second screen. Results investigated for enzyme producing condiction with identification of these two strains were as follow: F₄-188 and F₄-193 having the strong protease activity were classified with pseudomonas sp. and protease activity 65.5 unit/㎖, 74.6 unit/㎖, respectively. The optimum pH for enzyme activity was alkaline protease with pH 8.0 in F₄-188 strain and acid protease with pH 6.0 in F₄-193 strain. The highest protease activity for nitrogen source and carbon source was ammonium sulfate(1.7%) and starch(2.1%) in F₄-188 strain, albumin(1.5%) and α-cellulose(1.0%) in F₄-193 strain, respectivly. Effect of metal salt on the enzyme production in F₄-188 and F₄-193 strains was calcium chloride and magnecium sulfate, respectively. The optimum temperature for growth of two strains was 30℃ and heat-resisting property enzyme not to effect in 60 minutes at 40℃ but more that 90% were disappeared with heat treatment for 10 minutes at 80℃.

Influence of Al₂O₃ Nanowires on Ion Transport in Nanocomposite Solid Polymer Electrolytes

Kwon, Suk Jin,Jung, Byung Mun,Kim, Taehoon,Byun, Jinho,Lee, Jaekwang,Lee, Sang Bok,Choi, U Hyeok American Chemical Society 2018 Macromolecules Vol.51 No.24

<P>Understanding the ion transport mechanism in nanocomposite solid polymer electrolytes is necessary to develop next-generation electrochemical devices. We investigate the role of inorganic nanoparticle on ion conduction and segmental dynamics in cross-linked epoxy-based nanocomposite solid polymer electrolytes, complexed with Li<SUP>+</SUP>F<SUB>3</SUB>CSO<SUB>2</SUB>NSO<SUB>2</SUB>CF<SUB>3</SUB><SUP>-</SUP> (LiTFSI) salt and Al<SUB>2</SUB>O<SUB>3</SUB> nanowire, using dielectric relaxation spectroscopy. The addition of Al<SUB>2</SUB>O<SUB>3</SUB> not only increases the ionic conductivity σ<SUB>DC</SUB> by up to ∼10 times but also accelerates the segmental α motion compared to the host electrolyte. Increasing Al<SUB>2</SUB>O<SUB>3</SUB> content leads to a reduction in segmental α relaxation temperature <I>T</I><SUB>α</SUB> (fast dynamics), resulting in increased ion mobility as well as an enhancement in segmental α relaxation strength Δε<SUB>α</SUB>, lowering ion dissociation energy, as revealed by density functional theory calculations, thereby providing more mobile ions for conduction. This ion transport investigation provides insights into the design of high-conductivity nanocomposite solid polymer electrolytes for energy applications.</P> [FIG OMISSION]</BR>