다공성세라믹에 의한 에멀전상 유분흡착에 관한 연구

윤동준,권이열,김주영 漢陽大學校 環境科學硏究所 1988 環境科學論文集 Vol.9 No.-

본 연구는 다공성세라믹에 소수성처리를 하여 Emulsified oil의 흡착에 관하여 고찰하였다. 실험에 사용한 다공성세라믹에 Corn-oil, Kerosene 및 Bunker-A의 Emulsified oil을 회분식으로 실험하였다. 다공성세라믹의 particle size, 온도, pH 및 흡착제의 양을 변화시키며서 각 인자에 대하여 특성을 관찰한 결과, 제거율은 Bunker-A, Kerosen, Corn oil의 순서을 나타났으며, Activated Carbon과 비교실험하여 Activated Carbon보다 30%이상 좋은 유분제거율을 보였다. This investigation was carried out to study on the absorption properties of emulsified oils by porous ceramics. In this experiment, emulsified oils of corn oil, kerosene and bunker-A were used by porous ceramics in batch type experiment. The specific characterics were observated by factors particle size of porous ceramics, temperature, pH and amounts of absorbents. The efficiency of removal showed the sequence of bunker-A, kerosene, and corn oil. In the comparative experiment of activated carbon. the efficiency of removal of porous ceramics showed more high(over 30%) than it of activated carbon.

다공성 세라믹에 의한 중금속 이온의 흡착거동에 관한연구

윤동준,권이열,홍성자 漢陽大學校 環境科學硏究所 1989 環境科學論文集 Vol.10 No.-

본 연구는 다공성 세라믹을 이용하여 수용액중의 중금속 이온(Cu(Ⅱ),Pb(Ⅱ)의 흡착특성을 회분석(Batch Test) 실험으로 고찰하였다. 다공성 세라믹(porous ceramics)의 흡착능을 비교하기 위하여 Sand와 활성탄(Activated Carbon)을 비교흡착제로 사용하였으며, 실온에서 중금속 이온농도가 20mg/ι인 용액 50ml에 대하여 pH(2.0±0.5, 3.0±0.5, 6.0±0.5), 접촉시간(0.5hr, 1hr, 2hr,3hr) 및 흡착제양을 변화시키면서 각 인자에 대한 특성을 관찰하였다. 흡착제양이 4.0g이고 접촉시간이 3hr, pH6.0±0.5일 때 Sand는 Cu(Ⅱ), Pb(Ⅱ) 및 Zn(Ⅱ)의 제거율이 7.8%, 18.6% 및 7.1%로 나타났다. 활성탄 (0.3g)은 Cu(Ⅱ), Pb(Ⅱ) 및 Zn(Ⅱ)의 제거율이 99.5% , 99.5% 및 73.8%로 나타났다. 이에 대하여 다공성 세라믹은 Cu(Ⅱ)가 97.8%, Pb(Ⅱ)가 99.0% over 및 Zn(Ⅱ)가 38.3%로서 Cu(Ⅱ)와 Pb(Ⅱ)에 대하여 좋은 제거율을 보였다. This investigation was carried out to study on the sorption characteristics of heavy metallic ions (Cu(Ⅱ), Pb(Ⅱ), Zn(Ⅱ)) by porous ceramics in batch type experiment. To compare the sorption ability of porous ceramics, sand and activated carbon were used as comparative adsorbents. At room temperature the sorption characteristics were observed by factors-pH(2.0±0.5, 3.0±0.5, 6.0±0.5), contact time(0.5hr, 1hr, 2hr, 3hr), amounts of adsorbents for 50ml solution of 20mg/ιof each heavy metallic ions.

합성 염료 수용액에 대한 다공성 Ceramic의 흡착 특성

권이열,윤동준,지형하 漢陽大學校 環境科學硏究所 1989 環境科學論文集 Vol.10 No.-

소수성으로 처리한 다공성 ceramic의 흡착특성을 연구하고자 합성 염료수용액을 회분식으로 실험하였다. 다공성 ceramic의 양(1,2,3,4,5g) 및 particle size(30∼50, 50∼100, 100∼200mesh), temperature(25,30,40℃) 및 흡착시간(0.5,1,2,3hr)의 변화에 따라 탈색율(decoloring efficiency)을 관찰한 결과, 염기성 염료(methyl violet 2B)가 99.6%로 가장 좋았으며, 직접 염료(congo red)가 95.3%, 각 염료의 혼합용액(acid orange Ⅱ, nylon fast blue R, congo red, dark green 2B, methy, violet 2B, cationic red 7BN의 동일비율 혼합)이 70.5%, 산성 염료 (acid orange Ⅱ)가 62.8%인 순서로 나타났다. 흡착제의 양 및 흡착시간, 온도증가에 비례하였으며, particle size가 작을 수록 증가하였다. 이들 조건중 pH의 영향이 가장 크며, pH가 높을수록 흡착효율이 증가하였다. 다공성 ceramic의 염료 조색단(auxochrome)에 대한 친화성은 술폰산기(-SO₃H)에 비해 아미노기(-NH₂)가 우수한 것으로 나타났다. 전반적인 흡착경향은 염기성염료와 직접염료는 Freundlich 등온흡착식에 적합하게 일치되었으며, 산성염료는 Henry형에, 혼합용액은 Langmuir형과 유사한 상관도를 보였다. 재생이 가능한 장점으로 보아 흡착제로 유용하게 사용할 수 있을 것으로 전망된다. The adsorptive properties of porous ceramics(made of sam-wha ceramic co.) in aqueous dyes solution was performed by batch test. The measured decoloring efficiencies were 99.6% for methyl violet 2B, 95.3% for congo red, 70.5% for mixed dyes, 62.8% for acid orange II under various reaction conditions-amounts of porous ceramic, paricle size, temperature and pH. The decoloring efficiency was severely affected by pH, and increased at higher pH. The adsorption rate improved by enhancing adsorption time, amounts of porous ceramic and temperature, increased as the particle size down. Porous ceramics had an affinity for nitro-radical(-NH₂), but not sulphonic-radical(-SO₃H). It was suggested that the porous ceramics was a useful adsorbent because of regenerable merit.

미세절제술과 비교 유전자 보합법에 의한 각종 종양에서의 유전자 변화에 관한 연구

구선회,신소영,임춘화,전영미,이윤이,김진만 충남대학교 의과대학 지역사회의학연구소 2000 충남의대잡지 Vol.27 No.2

For the evaluation of oncogenesis, progression and prognosis of cancer, CGH is an important technique, because this technique is economic due to utilization of only one probe and lack of culture, screening mathod of whole genome and possibility of retrospective and prospective study. By the CGH, genornic variation of 20 breast cancer tissues, 23 stomach cancer tissues and 16 bladder cancer tissues were analyzed. The results were as followes ; 1. breast cancers The CGH results showed gains on chromosomes 8q(40%), lq(30%), 17q(15%), 20q(15%), 18q (15%), 5p(15%), and 13q(15%). The Deletions were on chromosomes 17p(45%) and 22q(20%). High-level amplifications(green/red ratio >1.5) were noted on chromosomes 1p31, iq, 3q25-qter, 5p, 7q31-qter, 8q, 9q22-qter, 10p, l1p, 11q22-qter, 12p, 12q24, 14g21-qter, 15q23-qter, 17q, 18p, 18q12-qter, 20p, and 20q. By comparison with infiltrating ductal carcinoma, the two medullary carcinomas showed high-level amplification on chromosomes iq3l, lq, 8q, 10p, 11p and 12p. 2. stomach cancers 1) Usual amplification sites of genome were lq, 13q, 17q, 20p,q. 2) 17p was the most common deletion site. The other sites of the deletion were lq, 4q. 3) In intestinal type of stomach cancer, genomic variation is more common than diffuse type. 4) In the cases of no evidence of lymph node metastasis, deletion of 17p is absent but amplification of 8q is obvious in the case of lymph node metastasis. 3. bladder cancers Common amplification of copy numbers of DNA sequences by CGH were seen at 1q, 3q, 4q, 5p, 6pq, 7p, 8q, 11q, 12q, 13q, 17q, 18q and 20pq(more than 20% of cases). High level amplification was noted at 1p32, 3p2l, 3q24, 4q26, 8q21-ter, 11q14-22, 12q15-21, 12q21-24, 13q 21-31, 17q22, and 18q22. Deletions were noted at 2q21-qter, 4q13-23, 5q, 8p12-22, 9pq, 11p13-15 (more than 20% of cases).

New modified version of the Risk Adjustment for Congenital Heart Surgery category and mortality in premature infants with critical congenital heart disease

Yoon Young Mi,Bae Seong Phil,Kim Yoon-Joo,Kwak Jae Gun,Kim Woong-Han,Song Mi Kyoung,신승한,Kim Ee-Kyung,Kim Han-Suk 대한소아청소년과학회 2020 Clinical and Experimental Pediatrics (CEP) Vol.63 No.10

Background: Despite advances in neonatal intensive care and surgical procedures, perinatal mortality rates for premature infants with congenital heart disease (CHD) remain relatively high.Purpose: We aimed to describe the outcomes of premature infants with critical CHD and identify the risk factors including the new modified version of the Risk Adjustment for Congenital Heart Surgery (M-RACHS) category associated with in-hospital mortality in a Korean tertiary center.Methods: This was a retrospective cohort study of premature infants with critical CHD admitted to the neonatal intensive care unit from January 2005 to December 2016.Results: A total of 78 premature infants were enrolled. The median gestational age (GA) at birth was 34.9 weeks (range, 26.7–36.9 weeks), and the median birth weight was 1.91 kg (range, 0.53–4.38 kg). Surgical or percutaneous intervention was performed in 68 patients with a median GA at birth of 34.7 weeks (range, 26.7–36.8 weeks) and a median birth weight of 1.92 kg (range, 0.53–4.38 kg). The in-hospital survival rate was 76.9% among all enrolled preterm infants and 86.8% among patients who received an intervention. Very low birth weight (VLBW), persistent pulmonary hypertension of the newborn (PPHN), bronchopulmonary dysplasia (BPD), and M-RACHS category 5 or higher (more complex CHD) were independently associated with in-hospital mortality. For the 68 premature infants undergoing cardiac interventions, independent risk factors for mortality were VLBW, BPD, and CHD complexity. Late preterm infant and age at intervention were not associated with patient survival.Conclusion: For premature infants with critical CHD, VLBW, PPHN, BPD, and M-RACHS category ≥5 were risk factors for mortality. A careful approach to surgical intervention and prenatal care should be taken according to CHD type and neonatal condition.

Enhancement of Emission Lifetime of CNT Emitters by Coating ZnO on the CNT Surface

Yoon, Sang Hyun,Chung, Dae Joon,Lee, Jong,Park, Kyu Chang,Kang, Chi Jung,Yoon, Tae-Sik,Le Shim, Ee,Choi, Young Jin American Scientific Publishers 2015 Journal of nanoscience and nanotechnology Vol.15 No.11

진로·취업프로그램이 이공계열 대학졸업자 노동시장 성과에 미치는 영향에 대한 다층분석

윤정이(Yoon, Jeong-ee) 학습자중심교과교육학회 2020 학습자중심교과교육연구 Vol.20 No.7

본 연구의 목적은 이공계열 대학졸업자들의 노동시장성과 개인 및 대학 요인을 진로 및 취업 프로그램에 초점을 맞춰 검증하는 것이다. 이를 위해 한국고용정보원 대졸자 직업이동 경로조사(GOMS 2016)를 활용하여 2수준 다층모형으로 분석하였다. 대학 수준 변수에 투입하기 위해 2수준 변수로 생성하기 위해 필요한 자료를 2019년 9월 한국고용정보원에 요청하였고 이후 자료의 코딩 및 분석 등을 거쳐 2019년 12월 최종 완료하였다. 연구결과는 첫째, 개인차원에서 전공계열, 학점, 자격증 유무, 학교만족도, 성별 이외에도 가계소득 및 모 학력과 같은 개인 배경이 임금에 영향을 미치고 있었다. 진로 및 취업 프로그램 중 면접기술 이력서 작성 프로그램 참여, 기업채용설명회 참여가 임금에 정적인 영향을 미치는 반면 인·적성적사 등 직업심리검사참여여부는 부적인 영향을 미치고 있었다. 둘째, 대학 차원에서 기업채용설명회 참여율이 높고 4년제 대학 일수록 임금 수준이 높아지는 반면 진로관련 개인 및 집단상담 참여, 직장체험 프로그램참여율이 높을수록 임금 수준이 낮았다. 셋째, 진로 및 취업프로그램 중 기업채용설명회 참여만이 상호작용효과를 보였는데, 기업채용설명회 참여와 임금의 관계에서 학교유형과 학교설립유형이 조절효과를 보였다. 본 연구를 통해 이공계열 대학졸업자 임금에 영향을 미치는 개인 및 대학 요인을 진로 및 취업관련 프로그램에 초점을 맞춰 살펴보았다. 이를 통해 이공계열 대학생을 위한 진로 및 취업프로그램 개선을 위한 단초를 제공할 것으로 기대한다. The purpose of this study is to analyze student and university factors affecting School-to-work transition of Engineering and Natural Science graduates focusing on university career program. And two-level Hierarchical Linear Modeling was applied to data harvested from GOMS(Graduates Occupational Mobility Survey) 2016. The results were as follows. First, the results of random-coefficient modelling, using group mean centering of student level, parent’s economic status, mother’s educational level, gender, academic major, GPA, certificates, and school satisfaction all positively affect outcome in labor market of Engineering and Natural Science graduates. When it comes to career program, resume writing/interview skill program and corporate recruitment session had an positive effect on the outcome whereas Occupational Psychological Test appeared to negatively affect the salary range. Second, the results of random I intercept modeling, using grand mean centering of university level factors, university type and rate of attending corporate recruitment session had an positive effect on outcome in labor market. However, career counseling program and work experience program negatively influenced in labor market outcomes for Engineering and Natural Science graduates. Third, the results of random-coefficient modelling, using group mean centering of student level factors appeared to have an interaction effect on the salary level by university type and type of school foundation. Finally, based on the above result, several suggestions were made in the discussion.

일반논문 : 내촌감삼(內村鑑三)의 사회개혁과 그 사상

윤복희 ( Bok Ee Yoon ) 한림대학교 일본학연구소 2012 翰林日本學 Vol.0 No.21

While beginning his employment at the newspaper "Yorozu choho", Uchimura Kanzo mainly presented editorials dealing with domestic and foreign current affairs. Thereafter, carrying on movements against the keeping of concubines and against pollution from the Ashio copper mine, etc., he did try to make direct attempts at social reform, but his editorial activities were still his main means of social reform. Especially through "Tokyo dokuritsu zasshi" and "Seisho no kenkyu", both of which he himself founded, he gradually came to strongly put forth his desire for social reform based on study of the Bible. Since his death, several scholars who have analyzed Uchimura`s unique social reform have discussed the unique elements of his thought. Dohi Akio`s "Nigenron" [Dualism] and Shibuya Hiroshi`s "Enshinteki shakai kairyoho"[Centrifugal Social Reform Method] are representative works. While the two put forth opposing views, it seems that neither can on their own explain Uchimura`s thought. In conclusion, Uchimura`s social reformist thought is a "centrifugal social reform method" predicated upon "dualism". That is to say that while Dohi and Shibuya`s ideas seem at loggerheads, in fact they do explain Uchimura`s thought by acting as completion for each other.

下顎 乳臼齒 早期喪失이 後繼承齒 崩出 및 隣接齒傾斜에 미치는 影響

尹炳伊(Byoung Ee Yoon) 대한치과의사협회 1972 대한치과의사협회지 Vol.10 No.6

금속나노입자-유전체 이층 구조 구현을 위한 반투명 Cu 나노입자층 형성에 관한 연구

윤혜련,조윤이,윤회진,이승윤,Yoon, Hye Ryeon,Jo, Yoon Ee,Yoon, Hoi Jin,Lee, Seung-Yun 한국전기전자재료학회 2020 전기전자재료학회논문지 Vol.33 No.6

This study reports the fabrication and application of semitransparent Cu nanoparticle layers. Spin coating and subsequent drying of a Cu colloid solution were performed to deposit Cu nanoparticle layers onto Si and glass substrates. As the spin speed of the spin coating increases, the density of the nanoparticles on the substrate decreases, and the agglomeration of nanoparticles is suppressed. This microstructural variation affects the optical properties of the nanoparticle layers. The transmittance and reflectance of the Cu nanoparticle layers increase with increasing spin speed, which results from the trade-off between the exposed substrate area and surface coverage of the Cu nanoparticles. Since the glass substrates coated with Cu nanoparticle layers are semitransparent and colored, it is anticipated that the application of a Cu nanoparticle-dielectric bilayer structure to transparent solar cells will improve the cell efficiency as well as aesthetic appearance.