Facile Synthesis of ZnO Nanoparticles and Their Photocatalytic Activity

이수근,A Young Kim,Jun Young Lee,Sung Hyun Ko,김상욱 대한화학회 2014 Bulletin of the Korean Chemical Society Vol.35 No.7

This paper reports the facile synthesis methods of zinc oxide (ZnO) nanoparticles, Z1-Z10, using diethylene glycol (DEG) and polyethylene glycol (PEG400). The particle size and morphology were correlated with the PEG concentration and reaction time. With 0.75 mL of PEG400 in 150 mL of DEG and a 20 h reaction time, the ZnO nanoparticles began to disperse from a collective spherical grain shape. The ZnO nanoparticles were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and a N2 adsorption–desorption studies. The Brunauer-Emmett-Teller (BET) surface areas of Z4, Z5 and Z10 were 157.083, 141.559 and 233.249 m2/g, respectively. The observed pore diameters of Z4, Z5 and Z10 were 63.4, 42.0 and 134.0 Å, respectively. The pore volumes of Z4, Z5 and Z10 were 0.249, 0.148 and 0.781 cm3/g, respectively. The photocatalytic activity of the synthesized ZnO nanoparticles was evaluated by methylene blue (MB) degradation, and the activity showed a good correlation with the N2 adsorption–desorption data.

가전제품의 하역 중 낙하충격에 관한 연구

이수근,Lee, Soo-Keun 한국포장학회 2000 한국포장학회지 Vol.6 No.1

This study was carried out to investigate dropping shock of household electric appliances during materials handling. Microwave oven($18{\ell}$), TV(16") and washing machine(6.2kg) were singled out as the study items. From the results of dropping test by KS A 1026(General Rules of Performance Testing for Packaged Freights), relative equations were gained as follow : y=0.0863x+10.032 for microwave oven, y=0.136x+7.85 for TV and y=0.214x+5.8 for washing machine (where y is G-factor and x is Dropping height). The maximum values of dropping shock during materials handling were measured to be $11{\sim}14G$ for microwave oven, $12{\sim}15G$ for TV and $10{\sim}12G$ for washing machine. The maximum shocks of microwave oven, TV and washing machine during materials handling were corresponding to dropping shocks of dropping height 45.98cm, 52.57cm and 28.97cm by KS A 1026.

설탕 및 사료의 파지혼용 크라프트 지대 개선에 관한 연구

이수근,Lee, Soo-Keun 한국포장학회 1999 한국포장학회지 Vol.5 No.2

This study was carried out to investigate improvement of kraft paper sack mixed with recycled paper for sugars and assorted feeds. Four Plies of kraft paper mixed with recycled paper(basis weight : $80g/m^2$) were taken place of two plies of kraft paper made from all pulp(basis weight : $98g/m^2$) and one ply of kraft paper mixed with recycled paper(basis weight : $80g/m^2$) for sugar 30kg. Three Plies of kraft paper mixed with recycled paper(basis weight : $80g/m^2$) were taken place of two plies of kraft paper made from all pulp(basis weight $98g/m^2$) for sugar 15kg and assorted feed 25kg. Physical properties, tensile strength, internal tearing strength and bursting strength, were improved by exchanging kraft paper mixed with recycled paper for kraft paper from all pulp and so kraft paper sacks made from all pulp were no damage in handling. They had so high friction coefficient that there was no danger of collapse on pallet by slipperiness in transportation and handling. And they had high printability so disappearance of printing by the contact with other paper sack in transportation was not found.

신선 농산물 수출 포장개발 및 파렛트 연구

이수근,이명훈,Lee, Su-Geun,Lee, Myeong-Hun (사)한국포장협회 2005 包裝界 Vol.152 No.-

수소저장합금을 이용한 수소자동차 연료저장탱크의 수소흡수-방출거동에 관한 연구

이수근(Soo Geun Lee),이한호(Han Ho Lee),정재한(Jai Han Jung),김동명(Dong Myung Kim),이재영(Jai Young Lee) 한국수소및신에너지학회 1994 한국수소 및 신에너지학회논문집 Vol.5 No.2

The hydrogen fuel tanks having hydrogen storing capacity of about 300g and 1200g are manufactured using MmNi_4.7Al_0.25V_0.05Fe_0.001 alloy. They are composed of several unit reactor made of Cu-tube(outer diameter = 50.1mm, thickness = 2mm). In order to increase the heat and mass transfer property of the hydride bed, Al-plates are inserted perpendicular to axial direction at intervals of 5mm and three arteries of diameter 8mm are installed symmetrically in each unit reactor. Hydrogen absorption is proceeded about 80% within 30 minute and is completed within 60 minute at the conditions of charging hydrogen pressure of 25atm and temperature of 22℃. On desorbing hydrogen at a constant rate of 30 slm at 20℃, discharging hydrogen pressure is sustained at 3-5atm for 120 minutes. The discharging pressure is increased upto 5-8atm as the increase of the reactor temperature to 30℃. From the experimental results and the brief discussions about the hydrogen absorption and disorption behaviors of the hydrogen storage tank, it is suggested that the behaviors of hydrogen charging and discharging could be controlled by adjusting the operating parameters and the reactor design parameters.

팔물군자탕(八物君子湯) 가미방(加味方)이 자성(雌性)생쥐의 생식능력에 미치는 영향

이수근 ( Su Keun Lee ),김동철 ( Dong Chul Kim ) 대한한방부인과학회 2010 大韓韓方婦人科學會誌 Vol.23 No.4

개혁신학에 "중간 지식"의 자리는 있는가 -티센의 "중간 지식 칼빈주의" 주장 철회과정을 중심으로

이수근 ( Soo Keun Lee ) 아세아연합신학대학교 신학연구소 2015 ACTS 신학저널 Vol.23 No.-

Debate between God’s foreknowledge and human free will has long history. A very attractive attempt to solve this debate was the Middle Knowledge theory, attributed to Luis de Molina, in which God knows what a man would do in any given circumstance. This knowledge is logically placed in between natural and free knowledges of God and got its name. Middle knowledge, however, had long been rejected by the Reformed Church due to its critical problem that makes God’s foreknowledge meaningless. Recently, Terrance Tiessen insisted that if we assume God has the counterfactual knowledge of what has not happened but could, and take this as conditional statements in the subjunctive mood, then this differs from God’s natural or free knowledge. Furthermore he proposed “Middle Knowledge Calvinism” after replacing the libertarian human freedom of Molinism with the freedom of spontaneity. The logical order is natural knowledge(“could do”), middle knowledge(“would do”), the decree and then free knowledge(“will do”). But he withdrew his proposal in 2 years saying that if we do not assume man has the power of contrary choice, the “could do” and “would do” can not be different. The proposal and withdrawal of middle knowledge by Tiessen reflects the strong demand of a logical explanation on the relationship between God’s foreknowledge and human free will.But he did not discard the concept of counterfactual knowledge to the last moment and conclusively I propose that if we continue our study on counterfactual knowledge it will expand our horizons of understanding of God and man.

파종성 혈관내 응고를 동반한 대칭성 말초 괴저

이수근(Soo Keun Lee),백영곤(Young Gon Baik),유희준(Hee Joon Yu),손숙자(Sook Ja Son) 대한피부과학회 1994 대한피부과학회지 Vol.32 No.1

We report a case of symmei.rical peripheral gangrene in a 22-day-old female associated with dissem-inated intravascular coagulation, which probably occured from septicmia of Enterobacter aerogenes. The skin lesions showed well-defined blackish gangrene surrounded by purpuric patches on the whole fingertips and toes except the loft thumb. Histopathologically, there were epidermal necrosis, diffuse extravasation of RBCs, mild petivascular inflammatory infiltrates and delated and RBC-filled vessels in the dermis. But, there was no definite evidence of vasculitis. In spit,e of aggressive antibictics therapy and other supportive measrres, she died at 39th day after birth. (Kor J Dermatol 1994; 32(1): 158-162)

비상대응 활동시 적용 가능한 3D 정보 전달 시스템 구축

이수근(Soo-Geun Lee),김정훈(Jeong-Hun Kim) 호서대학교 공업기술연구소 2021 공업기술연구 논문집 Vol.40 No.1

소방대원과 같은 인력의 경우 사고 대응 과정에서 구조물 또는 대상물에 필요한 정보를 효과적으로 파악하고 공유하는 것이 매우 어렵다. 본 연구에서는 천안아산역을 샘플링하여 비품, 대피 경로, 소화 시스템 등에 대한 종합적인 공간 데이터를 구축하고자 하였다. 기본적으로 3D GIS 정보를 이용한 3D 모델링 소프트웨어와 레이저 기반 3D 스캐너로부터의 측량 데이터를 상세히 구현하였다. 또한 위험, 주의, 안전에 관한 색상을 적용하여 대상물의 안전 상태 정보를 표현하였다. 최종적으로 다양한 3D 정보를 수집하여 비상대응시 프로세스를 구축하고, 구조 대책 및 활동 수립에 적합한 공간정보 전달 시스템을 파급시키고자 한다. In case of the manpower like fire fighters, it is difficult to identify and share efficiently necessary information for a construction and a target in the action process of accidents. In this research, total spatial data were constructed for the fixtures, evacuation routes, fire extinguishing system, and etc. through the sampling of Cheonan-Asan Station. Basically the measurement data were constructed in detail by the 3D Modeling software using the 3D GIS information and the surveyed data from the 3D Scanner based on laser. And the information of safety state for targets was expressed by applying on a risk or a caution, or a safety as colors. As a result, we are intended to establish the process in an emergency response as gathering various 3D information, and then to spread spatial information delivery system suitable for rescue plans and activities.

Acne Keloidalis Nuchae 3예

이수근 ( Soo Keun Lee ),강훈 ( Hoon Kang ),손숙자 ( Sook Ja Son ) 대한피부과학회 1996 대한피부과학회지 Vol.34 No.2

We report three cases of acne keloidalis nuchae which showing typical clinical and histopathological findings. A 61-year-old man showed well-defined child-fist sized erythematous to skin-colored hard plaque on his posterior scalp since two years ago and was treated by surgical excision and skin graft(STSG). A 22-year-old man showed discrete pinkish to erythematous pea sized follicular papules and pustules on his occiput since seven years ago and was treated by intralesional injection of triamcinolone for several times with fair response. Finally, a 38-year-old black man showed variable sized hard round follicular papules on his posterior scalp with several grouped hairs on the center of papules and was treated by intralesional injection of triamcinolone effectively. Histopathologically, common findings were follicular and perifollicular inflammation with the infiltration of plasma cells, neutrophils, lymphohistiocytes, massive dermal fibrosis resembling scar tissue, and diminished sebaceous glands. (Kor J Dermatol 1996;34(2): 336-340)