실관형 막모듈을 이용한 투과추출의 분리특성에 관한 연구

김우식,이호원,오준택 연세대학교 대학원 1991 延世論叢 Vol.27 No.1

The purpose of this study is to analyze separation characteristics in perstraction using hollow fiber modules. The perstraction experiments of acetic acid have been undertaken under various experimental conditions such as pressure changes, superficial velocity changes in aqueous and organic phases, and potting density changes in two systems with different distribution coefficients. There was no change in overall mass transfer coefficient with a change in the pressure difference between inside and outside hollow fiber. Tortuosity of hollow fibers used was obstained from mass transfer coefficients in membrane phase. The overall mass transfer coefficient increased nonlinearally with increase in organic and aqueous phase velocity where the proportion exponent was obtained to be 0.35 and 0.56 respectively.

都市地域住民의 生活體育 意識構造

鄭相澤,吳東燮,安禹洪,金正子,林銖遠 慶北大學校 體育科學硏究所 1991 체육과학연구지 Vol.7 No.-

This study was aimed to elucidata Taegu citizens' consciousness about Sport for All. 950 subjects responded to the researcher's questionnaires. The results are as follows; 1) 88.8% of whole subjects felt necessity of physical activity in every day life. In view of sex, 91.0% of male and 86.5% of female felt the necessity. 2) 73.4% of the subjects put weight in health improvement and 19.1% of the subjects put weight in strong mental power in relation to the value of physical activity. 3) About the local facilities of physical activity, only 8.3% of the subjects satisfied. A largy majority(65.7%) of the subjects reveated dissatisfaction. 4) Preference orders in relation to the expansion of facilities appeared as follows; tennis court(24.5%), swimming pool(14.4%), badminton court(12.5%), gymnasium(11.4%) and football field(7.0%). 5) 76.1% of the sujbjects thought that physical activity contribute to reduce demoralized life style, but 3.2% of the subjects not thought so. 6) About present participation in physical activity, 31.8% of the subjects answered being participated, but the large majority(68.2%) of the subjects answered not being participated. 7) Subjects' favorite physical activitier are tennis(18.6%), mounteering (12.9%), football(8.9%), golf(8.6%), badminton(8.3%), jogging(8.3%), gymnasics(7.3%) and swimming(7.0%) 8) The places of physical activities are private facilities(33.4%), work place(13.6%), private house(12.6%), school(10.9%) and physical education park(9.3%). 9) 73.9% of the subjects answered that they were participating in physical activity for health improvement. 10) 70.6% of the subjects felt the necessity of coach of Sport for All. 11) In case of not attendance to the physical activity, 70.6% of them answered that the main reason of not attendance was lack of leisure. 12) In case of not attendance, 33.7% of them spared time to TV watching, 28.8% of them to housework and 18.0% of them to sleeping. 13) 13.5% of subjects wanted to participate in swimming, 12.9% to tennis, 11.7% to table tennis, 10.8% to mountaineering, and 10.3% to badminton if circumstances permit.

제 3형 구상돌기 골절의 수술적 치료

전인호,민우기,오창욱,경희수,박병철,김풍택,인주철,이정엽 대한골절학회 2004 대한골절학회지 Vol.17 No.4

목적: 8례의 제 3형 척골 구상돌기 골절에 대해 수술적 치료 후 임상적 방사선학적 결과를 보고하고자 한다. 대상 및 방법 : 8명의 구상돌기 골절에 대한 후향적 연구를 시행하였다. 대상은 모두 남자였으며 평균 나이는 33세였다. 3례에서 척골 구상돌기 단독 골절이었으며 2례에서 주관절 탈구가, 2례에서 요골 두 및 경부 골절이, 1례에서 내측 측부인대 손상이 동반되었다. 전례에서 전방 도달법을 통해 유관나사를 이용한 관혈적 정복 및 내고정이 시행되었다. 평균 추시 기간은 31개월 이었으며 (24~60개월), Mayo Elbow Performance Score로 임상적 결과를 판정하였다. 결과 : 최근 추시에서 평균의 능동적 주관절 가동범위는 105°였다. 평균의 Mayo Elbow Performance Score는 76.9점이었다(50~95). 1례에서 최우수, 4례에서 우수, 2례에서 양호, 1례에서 불량의 결과를 보였다. 결론 : 제 3형의 척골 구상돌기 골절에서 조기의 관혈적 정복 및 안정적인 내고정으로 신뢰할 만한 치료를 제공하였으며, 손상 주관절의 동반된 인대손상과 복합골절은 중요한 예후인자로 간주되었다. Purpose: To review the clinical results of eight cases of typeⅢ coronoid process fractures which were treated operatively. Materials and Methods : Eight patients with coronoid type Ⅲ were reviewed retrospectively. All were men with an average age of 33. There were three isolated fractures, two elbow dislocations, two radial head and neck fractures, and one medial collateral ligament rupture. Open reduction and internal fixation through anterior approach with canulated screws was used. The patients were followed up for a mean of 31 months(24 to 60). Results: Average active elbow joint motion at the most recent follow up was 105°. The average Mayo Elbow Performance Score was 76.9 (50 to 95). There was one excellent result, four good, two fair, and one poor. Conclusion: Early open reduction and stable internal fixation provided a reliable method for the treatment of typeⅢ coronoid process fractures. Any associated ligament injuries to the elbow and fracture comninution were considered as important prognostic factors.

Which is the most accurate parameter to estimate the pulmonary wedge pressure in critically ill patients?

Woo Hyung Bae,June Hong Kim,Jun Hyuk Oh,Dong Won Lee,Sung Gook Song,Jeong Su Kim,Hyeon Gook Lee,Woo Seog Ko,Yong Hyun Park,Sang Gwon Lee,Kook Jin Chun,Taek Jong Hong,Yung Woo Shin 대한내과학회 2004 대한내과학회 추계학술대회 Vol.2004 No.1

Double Carbon Coating of LiFePO₄ as High Rate Electrode for Rechargeable Lithium Batteries

Oh, Sung Woo,Myung, Seung‐,Taek,Oh, Seung‐,Min,Oh, Kyu Hwan,Amine, Khalil,Scrosati, Bruno,Sun, Yang‐,Kook WILEY‐VCH Verlag 2010 Advanced Materials Vol.22 No.43

<P><B>Micrometer‐size LiFePO<SUB>4</SUB> spheres</B> with homogeneous double carbon coating layers have been prepared as potential electrode materials for battery applications. The double carbon‐coated LiFePO<SUB>4</SUB> electrodes in a lithium‐ion cell exhibited discharge capacities of the order of 160 mAh g<SUP>−1</SUP> and 115 mAh g<SUP>−1</SUP> at 25 °C under 0.1 C‐rate and 10 C‐rate, respectively. </P>

Detection of Severe Fever Thrombocytopenia Syndrome virus in domestic pigs, South Korea. 2016

Woo-Taek Oh,Hee-chun Chung,Hye-jung Yang,Jung-ah Kim,Bong-kyun Park 대한수의학회 2016 대한수의학회 학술대회발표집 Vol.2016 No.-

US-Originated Strain of Porcine Deltacoronavirus Outbreaks in South Korea, 2014~2016

Woo-Taek Oh,Hee-chun Chung,Hye-jung Yang,Jung-ah Kim,Bong-kyun Park 대한수의학회 2016 대한수의학회 학술대회발표집 Vol.2016 No.-

Alcaligenes latus 에 의한 PHB 의 생합성에 관한 연구

김우식,오준택,조근도,윤정열 한국화학공학회 1997 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.35 No.3

본 논문은 Alcaligenes latus DSM 1123 균주의 최적 증식조건 및 PHB 생합성을 위한 효과적인 배양방법에 관한 연구이다. 최적 균증식 조건에 대한 실험은 진탕배양기를 이용하였으며, 얻어진 최적 조건 하에서 2.5L 용량의 호기성 배양 장치를 사용하여 회분식 배양과 pH 조절 용액을 달리한 유가식 배양을 행하였다. 배양에 있어 탄소원 및 질소원은 각각 저가의 탄소원인 sucrose및 (NH₄)₂SO₄를 사용한 경우가 가장 효율적이었다. 최적의 C/N비는 탄소원 및 질소원 농도에 비례하여 증가하였으며, sucrose농도 30g/L일 경우 C/N비 30에서 최대의 비증식속도를 보였다. Yeast extract 0.5 g/L와 polypeptone 1.0 g/L를 배지 중에 첨가한 결과 지연시간의 감소 및 2배 이상의 비증식 속도 향상을 보였다. 또 A. latus는 A. eutrophus와 달리 균증식기에도 PHB를 합성하였다. 초기에는 NH₄OH용액을, 균증식기 중반부터는 NaOH용액을 이용하여 2단 유가식 배양을 하였을 경우가 NH₄OH 용액과 NaOH 용액을 각각 이용하여 pH를 조절한 경우에 비하여 비증식속도와 균체량 및 PHB 축적량이 증가하였으며, 이때의 최종균체량, PHB 합성량 및 최종 균체량에 대한 PHB 축적률은 각각 17.6 g/L, 8.04 g/L 및 46%이었다. Culture conditions for the optimum growth and biosynthesis of PHB in Alcaligenes latus DSM 1123 were investigated. Optimum carbon and nitrogen sources and their concentrations for growth were determined, and batch and fed-batch fermentations were performed in a 2.5 L jar type aerobic fermenter with various pH control solutions. Sucrose and (NH₄)₂SO₄ were found to be the most effective carbon and nitrogen sources for the growth of A. latus, respectively. Optimum C/N ratio was found to be varied with the concentrations of carbon and nitrogen sources. The maximum specific growth rate was obtained at the sucrose concentration of 30 g/L and C/N ratio of 30. The specific growth rate increased more than two times and lag time was reduced when yeast extract and polypeptone were added. PHB could be synthesized in the logarithmic growth phase. By using NH₄OH and NaOH solutions in the first and second stage as pH control solution, significant increases in the specific growth rate, biomass and PHB concentrations were observed. Under the optimal conditions, the maximum biomass and PHB accumulation yield(Y_(P/X) attained after 40 hours were 17.6 g/L and 46 %, respectively.

웹 기반 가상 현실 스마트 팜 서비스

장우석(Woo-seok Jang),오승택(Seung-taek Oh),이동익(Dong-ik Lee),진성호(Sung-ho Jin),안형태,오병우(Byung-woo Oh) 한국정보기술학회 2022 Proceedings of KIIT Conference Vol.2022 No.6

전 세계적으로 채식의 수요량이 증가함에 따라 다양한 공간에서 식물을 재배할 수 있는 스마트 팜 기술이 주목받고 있다. 스마트 팜 운영이 활성화되며 스마트 팜의 관심이 높아졌으나 개인이 신기술이 적용된 농업에 대한 정보를 입수하기에 어려움이 크다. 본 논문에서는 스마트 팜 구축을 위한 개인들을 대상으로 반응형 웹 기술과 WebGL 기술을 활용하여 가상공간에서 사용자에게 스마트 팜 운영에 필요한 설비와 식물의 생장에 필요한 요소에 대한 정보를 제공하고 이를 시험해 볼 수 있는 서비스를 제안한다. As the demand for vegetables increases around the world, smart farming technology that can grow plants in various spaces is drawing attention. Although smart farming have been activated and interest in smart farms has increased, it is difficult for individuals to obtain information on agriculture with new technologies. In this paper, we propose a service that allows individuals to use reactive web technologies and WebGL technologies to provide users information on the facilities and plant growth necessary for smart farm operation in a virtual space and test them.

Identification and phylogenetic characterization of Nybelinia surmenicola (Cestoda: Trypanorhyncha) from squids (Todarodes pacificus) from East Sea, Republic of Korea

Jin Woo Jun,Sib Sankar Giri,Hyoun Joong Kim,Sae kil Yun,Cheng Chi,Sang Guen Kim,Sang Wha Kim,Jeong Woo Kang,Se Jin Han,Jun Kwon,Woo Taek Oh,Dal sang Jeong,Se Chang Park 한국예방수의학회 2018 예방수의학회지 Vol.42 No.3

In the current study, a total of 102 common Todarodes pacificus squid caught in the East Sea were investigated for parasitological research. The results revealed that 33 (32.35%) out of 102 squid were infected by Nybelinia surmenicola, the mean intensity was 5.58 parasites per squid, and the maximum abundance was 11. Morphological analysis using a field emission scanning electron microscope showed the characteristic features of N. surmenicola. Molecular identification based on the 28S rRNA gene confirmed the isolated parasite as N. surmenicola, while phylogenetic analysis revealed that N.surmenicola isolated in this study was clustered with N. surmenicola isolated from Japan. This is the first report of phylogenetic characterization of N. surmenicola isolated from Korea.