가스상 대기오염물질에 의한 종이 기록물의 가속열화 특성 연구

정소윤(So-Yoon Jeong),전수연(Soo-Yeon Jeon),백소라(So-Ra Baek),정현석(Hyun-Seok Jeong),이진희(Jin-Hee Lee),김형진(Hyoung-Jin Kim) 한국펄프·종이공학회 2015 펄프.종이기술 Vol.47 No.4

Paper records were generally degraded by some factors from atmospheric environments, like temperature, relative humidity or air pollutants. In this study, the degradation behavior of paper records by single or mixed gases of NO₂, SO₂, HCHO and TVOC was evaluated. The mechanical, optical and chemical properties of 4 kinds of paper (acid and neutral-based printing paper, traditional Hanji, and filter paper) were directly and indirectly affected by gaseous harmful materials. The brightness and L<SUP>*</SUP> value in all papers were slightly increased by accelerated aging under gaseous HCHO and TVOCs, but highly decreased by conditions under gases NO₂ and SO₂. The optical properties of paper records were most vulnerable in acid-based paper and high stable in filter paper and traditional Hanji by air pollutant degradation. The aging treatments under mixed gas pollutants including NO₂ resulted in decrease of physical, mechanical and optical properties of paper, so it was supposed that the concentration of NO₂ gas would be strictly controlled for optimum indoor air quality management in domestic storage centers for paper records.

대기 중 유해성분(NO₂, SO₂, HCHO)에 의해 열화된 종이의 물리적 특성

백소라(So Ra Beck),정소윤(So Yoon Jeong),정현석(Hyun Suk Jung),이진희(Jin Hee Lee),김형진(Hyoung Jin Kim),김신도(Shin Do Kim) 한국펄프·종이공학회 2014 한국펄프·종이공학회 학술발표논문집 Vol.2014 No.10

Blue Phosphorescence with High Quantum Efficiency Engaging the Trifluoromethylsulfonyl Group to Iridium Phenylpyridine Complexes

Kim, Jin-Hyoung,Kim, So-Yoen,Jang, Seol,Yi, Seungjun,Cho, Dae Won,Son, Ho-Jin,Kang, Sang Ook American Chemical Society 2019 Inorganic Chemistry Vol.58 No.23

<P>Incorporation of an electron-withdrawing −SO<SUB>2</SUB>CF<SUB>3</SUB> substituent to cyclometalating C^N-phenylpyridine (ppy) ligand resulted in an expected blue-shifted phosphorescence in the corresponding homoleptic <B>Ir(ppySCF</B><SUB><B>3</B></SUB><B>)</B><SUB><B>3</B></SUB> complex, showing the emission of λ<SUB>em</SUB> = 464 nm at 300 K. One of its heteroleptic derivatives, modified by a pyrazolyl borate LX ligand, <B>Ir(ppySCF</B><SUB><B>3</B></SUB><B>)</B><SUB><B>2</B></SUB><B>(bor)</B>, exhibited further blue-shifted phosphorescence of λ<SUB>em</SUB> = 460 nm at 300 K. Cyclic voltammograms (CVs) and density-functional theory (DFT) calculations supported the efficacy of the electron-withdrawing capability of the SO<SUB>2</SUB>CF<SUB>3</SUB> substituent lowering HOMO energy and obtained widened bandgaps and resumed blue emissions for all of the iridium complexes studied. The homoleptic complexes of both substituents, <B>Ir(ppySCF</B><SUB><B>3</B></SUB><B>)</B><SUB><B>3</B></SUB> and <B>Ir(ppySF)</B><SUB><B>3</B></SUB>, reached the higher quantum yields (<I>Φ</I><SUB>PL</SUB>) of (0.89 and 0.72), respectively. Similarly, emission quantum yields (<I>Φ</I><SUB>PL</SUB>) of the heteroleptic derivatives were reported to be (0.75, 0.83, and 0.87) for <B>Ir(ppySCF</B><SUB><B>3</B></SUB><B>)</B><SUB><B>2</B></SUB><B>(acac)</B>, <B>Ir(ppySCF</B><SUB><B>3</B></SUB><B>)</B><SUB><B>2</B></SUB><B>(bor)</B>, and <B>Ir(ppySCF</B><SUB><B>3</B></SUB><B>)</B><SUB><B>2</B></SUB><B>(pic)</B>, respectively. Emission kinetics support the enhanced quantum efficiency when <I>k</I><SUB>r</SUB> and <I>k</I><SUB>nr</SUB> values are compared between <B>Ir(ppySCF</B><SUB><B>3</B></SUB><B>)</B><SUB><B>3</B></SUB> and <B>Ir(ppySF)</B><SUB><B>3</B></SUB>, and both values favorably contribute to attaining a higher quantum efficiency for <B>Ir(ppySCF</B><SUB><B>3</B></SUB><B>)</B><SUB><B>3</B></SUB>. Among solution-processed multilayered devices having an ITO/PEDOT:PSS/TCTA:Ir dopant (10:1, <I>w</I>/<I>w</I>)/TmPyPB/Liq/Al structure, a heteroleptic dopant, <B>Ir(ppySCF</B><SUB><B>3</B></SUB><B>)</B><SUB><B>2</B></SUB><B>(bor)</B>, exhibited better device performance, reporting an external quantum efficiency (EQE) of 1.14%, current efficiency (CE) of 2.31 cd A<SUP>-1</SUP>, and power efficiency (PE) of 1.21 lm W<SUP>-1</SUP>, together with blue chromaticity of CIE<SUB>x,y</SUB> = (0.16, 0.32).</P><P>Blue phosphorescence of Ir(III) complexes can be tuned with the introducing of strong electron withdrawing substituents and the variation in the ancillary ligands.</P> [FIG OMISSION]</BR>

Rocuronium 정주시 통증에서 Ondansetron 전처치에 따른 효과

소금영,기형섭 朝鮮大學校 附設 醫學硏究所 2003 The Medical Journal of Chosun University Vol.28 No.2

Background: Intravenous rocuronium produces intense discomfort at the injection in conscious patients. The purpose of this study was two fold; first, to determine the incidence and severity of pain associated with IV injection of rocuronium in conscious patients; and second, to determine the efficacy of IV ondansetron in minimizing injection pain. Methods: We evaluated 60 inpatients undergoing various elective surgery. The patients were randomized into three groups of 20 patients in double blinded prospective study. After tourniquet application on forearm, the patients were given saline (4 ml) (Group I, n=20), ondansetron 6 mg (Group II, n=20), ondansetron 8 mg (Group III, n=20). The occlusion was released after 20 seconds and rocuronium 0.6 mg/kg was injected over 10 seconds. The patients were observed and asked immediately if they had pain in the arm, and the response was assessed. Thirty seconds after the administration of the rocuronium, 5 mg/kg of thiopental was administered intravenously. Results: We observed that the incidence of moderate to severe pain was 85 % in the group 1 and were significantly decreased to 45 % in the group 2, 5 % in the group 3. Conclusions; The doses of 6 mg and 8 mg ondansetron was effective in relieving the pain of rocuronium.

식물성 단백질 수준이 성장기 흰쥐의 골밀도에 대한 칼슘 효율에 미치는 영향

정소형,최미자 東國專門大學 1996 金龜論叢 Vol.3 No.1

본 연구는 선행연구에서 성장기 흰쥐의 경우 동물성 단백질인 casein의 수준(20%, 40%)을 달리 하였을 때 골밀도 및 골밀도에 대한 칼슘효율이 고단백군에서 높게 나타났으므로 단백질 급원을 식물성 단백질로 대치하였을 경우에도 골밀도에 대한 칼슘 효율에 미치는 영향이 동일하게 나타나는지를 조사하고자 시도하였다. 실험식이는 단백질 급원을 Soy protein으로 대치한 것 외에는 선행연구의 모든 조건과 실험방법을 같게 하였다. 즉, 단백질 급원은 식물성 단백질인 Soy protein을 사용하였고, 단백질 수준을 대조군 20%, 고단백군 40%로 조절하여 9주간 실험하였다. 골밀도와 골무기질 함량은 양에너지 방사선 골밀도 측정기(dual energy X-ray absorptiometry)를 이용하여 9주째 측정하였고 요와 혈청에 대한 생화학적 분석을 하였다. 연구 결과를 요약하면, 요중칼슘 배설량과 Crosslinks value, 혈청 칼슘, 인, ALP, Osteocalcin함량은 유의적 차이를 나타내지 않았다. 또한 총 골밀도, 총골무기질 함량, 총골칼슘 함량 및 척추와 대퇴부의 골밀도 함량과 이에 대한 각각의 칼슘효율은 유의적 차이를 나타내지 않았다. 따라서 단백질의 종류에 따라서 단백질 급여수준이 골밀도 및 골밀도에 대한 칼슘 효율에 미치는 영향이 다름을 알 수 있었다.

전상회계 전자교재(e-Textbook) 개발에 관한 연구

김소형,정용화 한국직업능력개발원 2003 직업능력개발연구 Vol.6 No.1

This study researched to apply a accounting education method of the future that to consider college environment. The research model was completed to be analysis a concept, strong-weakness of e-Book & e-Text Book, environment factor for development of accounting e-textbook. The contents development used to the effect of animation and made the simple design. It was to be purposed to study an important accounting knowledge fast. The accounting e-textbook was made to use the PC and internet explore for convenient the students. This method learn anywhere the computer accounting program.

감식초가 고콜레스테롤 식이를 한 흰쥐의 혈중 지질 성분에 미치는 영향

정소형,김주현,정용진,최미자 동아시아식생활학회 1999 동아시아식생활학회지 Vol.9 No.4

This study was performed to evaluate the effect of persimmon vinegar on serum lipid components in the hypercholesterolemic Sprague-Dawley male rats. Forty rats were divided into four groups and fed diets containing 1% cholesterol for 4 weeks. Experimental diets added to distilled water, 1.5%, 3%, and 7% persimmon vinegar(PV) as drinking water. Concentration of total cholesterol, LDL and HDL cholesterol, triglyceride in serum and activity of AST, ALT in serum were assayed. Average food intake, weight gain and FER of experimental rats were not significantly different by contents of persimmon vinegar. Concentration of total cholesterol and LDL cholesterol in serum were lowest in 7% persimmon vinegar group. However concentration of HDL cholesterol in serum was highest in 3% persimmon vinegar group. Concentration of triglyceride in serum was significantly lower in persimmon vinegar group than control group. Activities of AST and ALT in serum were lowest in 7% persimmon vinegar group. The results in this study suggest that persimmon vinegar is effective in lowering serum triglyceride level.

대구지역 대학생의 패스트푸드점과 대학식당 이용실태조사

정소형 東國專門大學 1998 金龜論叢 Vol.6 No.1

대구지역의 계명대학 남녀 대학생 210명(남 109명, 여 101명)을 대상으로 패스트푸드점과 대학식당의 이용실태를 조사한 결과를 요약하면 다음과 같다. 패스트푸드점을 선택하게 된 이유로 남학생과 여학생 모두 맛, 가격, 분위기 순으로 나타났으며 대학식당의 경우 가까운 곳에 위치하는 편리함이 가장 우선순위로 나타났다. 패스트푸드점의 이용빈도는 남녀학생 모두 한달에 2회 미만이 전체 45.4%로 가장 높았으며, 대학식당은 남녀대학생 사이에 유의적인 차이를 보여 여학생의 빈도가 남학생보다 높았다. 음식선택의 기준은 남녀대학생 모두 맛이 최우선 순위로 나타났으며 1회 식사비용으로 패스트푸드점의 경우는 남녀대학생 사이에 유의적인 차이를 보여 남학생의 비용지출이 여학생에 비해 높았으며 대학식당의 경우 유의적인 차이 없이 1500원 미만이 85.6% 였다. 패스트푸드점의 만족도는 위생, 서비스, 음식의 온도면에서 유의적인 차이를 보여 여학생이 남학생에 비해 좋게 평가하였으며(p<0.05, p<0.001) 대학식당은 남학생이 여학생에 비해 맛을 좋게 평가하였다.(p<0.05)

사판식 유압피스톤 펌프ㆍ모터의 해석 및 설계

현동수,이용범,김형의 大田産業大學校 2000 한밭대학교 논문집 Vol.17 No.1

Since the swash plate type axial piston pump/motor utilizes hydrostatic bearings between the surfaces of fixed and moving parts in the design. it becomes not only high pressurized but also high efficient, and it is thus used in many fields that require the high speed and the high power per unit weight - mobility equipments, concrete mixer drums, tractors. military products etc. The swash plate type axial piston pump/motor is characterized by high power per unit weight, power transmission, and easy operation. but relatively big power loss, and sensitivity to contaminated operating oil are taken into consideration disadvantages over others. With the design consisting of very precise and complicated parts its performance truly varies depending on manufacturing and assembly techniques in the production. In this study, analytical approaches and power loss mechanisms are proposed for the in-line integrated Hydrostatic Transmission(HST) with variable hydraulic piston pump and fixed hydraulic piston motor in order to improve performance. To this end, first, analytical model and characteristics on the piston show and shoe plate from basic theories in hydraulic pump/motor are presented, and volumetric and mechanical losses are further investigated.

상악측절치 수복을 위한 Cantilever Bridge 장착시 치조골의 응력분석

김형수,양홍서 전남대학교 치과대학 1991 전남치대논문집 Vol.3 No.1

The purpose of this study was to analysis the stress distribution induced by three unit PFM bridges and various cantilever bridges replacing maxillary latersal incisor. The simplified two-eimensional photoelastic models used for this study was constructed in the following way. CR/R ratio was designed to be 1 : 1, 1 : 1.25, and 1 : 1.5. The pontics of cantilever bridge supported by maxillary canines consisted of wrap-around type, rest-extension type and simple type. 3-unit PFM bridge was constructed with traditional method. 1kg vertical static load was applied on the center of the incisal edge of the pontic. The stress pattern was examined and recorded by photography. The results obtained were as follows ; 1. The magnitude of stress on the abutment root apex area of a traditional 3-unit bridge was the lowest. 2. The model of cantilevered pontic with a rest showed the relatively well distributed stress around the abutment tooth. The model with simple pontic generated the greatest stress concentration in the supporting structure of the abutment tooth. 3. As the height of bone level reduced, the rotational and vertical force increased around the abutment tooth. 4. The stress concentration of the 3-unit bridges occured on the root apex and stress concentration of the cantilever bridge occured on the root apex and cervical area. 5. In the case of the cantilever bridge, stress concentrated distally on the root apex area of the abutment tooth and additional stress was observed mesially on the upper part of the root. Especially in the case of the simple pontic, this phenomenon was more apparent than the others. 6. Force applied to cantilevered pontic was transmitted to the adjacent central incisor ghrough the contact surface. Stress was markedly observed on the mesial cervix area in the case of simple pontic and on the root apex area in the case of wrap-around type and rest-extension type.