Organic Solar Cells: Solution‐Processable Reduced Graphene Oxide as a Novel Alternative to PEDOT:PSS Hole Transport Layers for Highly Efficient and Stable Polymer Solar Cells (Adv. Mater. 42/2011)

Yun, Jin‐,Mun,Yeo, Jun‐,Seok,Kim, Juhwan,Jeong, Hyung‐,Gu,Kim, Dong‐,Yu,Noh, Yong‐,Jin,Kim, Seok‐,Soon,Ku, Bon‐,Cheol,Na, Seok‐,In WILEY‐VCH Verlag 2011 Advanced Materials Vol.23 No.42

<P>Solution‐processable reduced graphene oxide as a hole‐transporting layer for highly efficient and stable organic solar cells is reported on page 4923 by Dong‐Yu Kim, Seok‐In Na, and co‐workers. Introduction of a newly reduced graphene oxide by simple solution processing into solar cells dramatically raises the cell efficiency and cell life‐time. The results will allow full use of chemically reduced graphene and will advance the realization of carbon‐based printable optoelectronic devices. </P>

식도를 포함한 전위장관을 침범한 전이성 악성 흑색종 1예

최정영,김준기,신성하,고영춘,조상욱,서강석,강명원,임연근,여향순,김경수 全南大醫大 2001 전남의대학술지 Vol.37 No.1

사망 진단서(시체 검안서) 작성의 문제점

김규석,임용수,이중의,서길준,윤여규,어은경,염석란,정연권,이윤성 대한응급의학회 2000 대한응급의학회지 Vol.11 No.4

Background: This study was conducted to analyze the current problems in completing death certificates and to identify the correct method for completing death certificates Methods: We reviewed 262 death certificates in three hospitals from March 1 to April 30, 2000, and 119 death certificates in one hospital from March 1 to 31, 2000. We identified major and minor errors and analyzed and compared them retrospectively. Results: A total of 381 death certificates were reviewed: 59 in Seoul National University Hospital,101 in Ewha Woman's University Hospital, and 102 in Gachon Medical College Hospital, which has no education program for completing death certificates in postgraduate training, and 119 in Samsung Medical Center which has an education program for completing death certificates. 358 certificates(94.0%) had at least one error. There were only 23 death certificates(6.0%) without an error. In 182 cases(47.8%), there was one major error. In 321 death certificates(84.3%), there were more than two errors. A comparison of Samsung Medical Center with the other hospitals showed that the number of total errors was statistically different(p=0.001). Conclusion: There were few death certificates without an error in this study. In a hospital which has postgraduate training in completing death certificates, there are fewer errors than in other hospitals which have no training course. Emergency physicians actually certify many deaths, so they must know the correct method of completing death certificates for statistics on morbidity and mortality.

공공도서관의 공간구성비 변화에 관한 연구 : 대구광역시 공공도서관을 중심으로 focused on the Public Library in Daegu

김여경,정지석,최무혁 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(계획계)

In line with the fast development of the modern society, the basic function of the public library has been changing to meet the present user's needs and social requests. Such multiple library organizations have been continuously and rapidly changed. This study suggests to analyze the changes in the space composition of the public library in Daegu. It explains the relationship of the multiple programs for public library and users who need new requests. The results of this study are as follows : The changes for new needs and requests are 1) to extend lecture rooms and auditorium, 2) to offer a reading room more open for public users, 3) to extend internet data and clipping data. These changes are attended with various problems.

Helicobacter pylori와 대장균의 Shuttle Vector 개발

조명제,이우곤,이상룡,김경희,안영숙,김성희,김현주,류복덕,최여정,윤영혜,백승철,전영석,이광호 경상대학교 유전공학연구소 1997 遺傳工學硏究所報 Vol.16 No.-

In this study, a vehicle vector using cryptic plasmids was constructed for gene transfer in Helicobacter pylori. pHP51(3.9 kb) and pHP489(1.2 kb) were selected for constructing vectors from cryptic plasmid of H. pylori isolates in Korea. The HindⅢ-digestedDNA fragment(1.2kb) of pHP489 and 1.6kb DNA fragment of pHP51 were ligated with a kanamycin resistance gene(aph3'-Ⅲ) from C. jejuni to produce the recombinant plasmids pHP489K and pHP51K, respectively. Transformation frequency of pHP51K by electroporation was low. But pHP489K could be effectively transformed into various H. pylori strains. In order to design an intermdiate vehicle vector for gene transfer into H. pylori, pBlueHP489K was prepared by recloning pHP489K DNA into pBluescript and pTZ19R vector. This vector permitted the DNA fragment containing pHP489 sequence, aph3'-Ⅲ, and cloned DNA to be cut and self-ligated in the SacⅠ site after cloning. ureA and ureB gene were inserted into pBlueHP489K, resulting in pBlueHP489K/AB. The DNA fragment containing pHP489, kanamycin resistance gene(aph3'-Ⅲ), and urease structural gene was cut away from pBlueHP489K/AB and self-ligated to generate pBlueHP489K/AB. pBlueHP489K/AB made urease-negative H. pylori strains restore their urease activity. By this experiment, pBlueHP489K was confirmed to be the vehicle system for transferring H. pylori genes.

오미자와 배를 이용한 혼합 발효주 제조 방법에 대한 연구

정석태(Seok-Tae Jeong),공문희(Mun-Hee Kong),여수환(Soo-Whan Yeo),최지호(Ji-Ho Choi),최한석(Han-Seok Choi),한귀정(Gwi-Jung Han) 동아시아식생활학회 2010 동아시아식생활학회지 Vol.20 No.6

신이식 환자에서 혈청 호모시스틴 농도의 변화

김여경(Yeo Kyeoung Kim),이연경(Youn Kyoung Lee),이균상(Kyun Sang Lee),조민석(Min Seok Cho),정택균(Taek Kyun Jeong),박병석(Byoung Seok Park),정균호(Gyun Ho Jeong),마성권(Seong Kwon Ma),김수완(Soo Wan Kim),김남호(Nam Ho Kim),최기철(Ki 대한내과학회 2002 대한내과학회지 Vol.63 No.3

배경 : 신이식 후에 발생하는 심혈관계 질환은 이식신의 손실과 함께 환자 사망의 주요한 원인으로 알려져 있다. 알려진 심혈관계 질환의 위험인자들로는 고지혈증, 고혈압, 당뇨병, 고령 및 흡연 등이 있으며, 또한 급성 거부반응의 유무, 좌심실 비대, C-reactive protein 등 염증 반응과 함께 고호모시스틴 혈증 등이 보고되고 있다. 호모시스틴은 신장 사구체를 통하여 배설되는 아미노산으로 말기 신질환 및 신이식 환자에서의 심혈관계 질환의 위험인자로 생각되고 있으나, 신이식 후 호모시스틴 농도의 변화 및 엽산과 비타민 보충 요법 등의 치료 효과는 아직 확립되어 있지 않다. 본 연구에서는 말기 신질환 환자들에서 신이식을 시행한 후 고호모시스틴 혈증의 발생과 이에 영향을 미치는 인자들에 대해 조사하였다. 대상 및 방법 : 정상 대조군 21명, 만성 신부전으로 최소 2개월 이상 치료 중인 환자 중 만성 신부전 보존 치료군 37명과 신이식 환자 48명을 대상으로 혈청 호모시스틴 농도와 혈청 호모시스틴 농도에 영향을 미치는 인자 등을 조사하였다. 결과 : 고호모시스틴혈증(정상대조군의 95백분위수 14.54 μmol/L 이상)의 유병율은 정상 대조군, 만성 신부전 보존 치료군과 신이식 환자군에서 각각 4.8%, 83.8%, 45.8%였다. 신이식 환자군 중 고호모시스틴 혈증은 정상 신기능군(혈청 크레아티닌 농도 남: 1.2 mg/dL, 여: 1.1 mg/dL 이하)과 비정상 신기능군에서는 각각 18.8%, 59.4%였다. 신이식 환자군(16.38±6.48 μmol/L)에서의 혈청 호모시스틴 농도는 정상 대조군(8.80±2.07 μmol/L)과 비교하여 유의하게 높았으나(p<0.01), 만성신부전 보존 치료군(24.68±9.01 μmol/L)과 비교하여 유의하게 낮았다(p<0.01). 또한 신이식 환자들 중 혈청 크레아티닌 정상군(12.02±3.68 μmol/L)에서 비정상군(18.57±6.51 μmol/L)에서의 혈청 호모시스틴 농도과 비교하여 유의하게 낮았다(p<0.01). 다중 회귀 분석상 신이식 환자들에서 혈청 호모시스틴 농도에 영향을 주는 독립적 인자는 혈청 크레아티닌 농도이었으며, 전혈 사이클로스포린 농도나 비타민 및 엽산 보충 요법의 유무와는 무관하였다. 결론 : 본 연구에서 신이식 환자의 혈청 호모시스틴 농도는 정상인에 비하여 유의하게 높았으나 보존 치료 중인 말기 신부전 환자와 비교시 유의하게 낮았다. 혈청 호모시스틴 농도에 영향을 주는 인자는 혈청 크레아티닌 농도였다. 또한 이러한 혈청 호모시스틴 농도의 감소가 신이식 환자에서의 심혈관 질환 발생의 감소에 기여할 것인지는 추후 연구가 필요할 것으로 사료된다. Background : Cardiovascular disease (CVD) after kidney transplantation is a major cause of both graft loss and patient death in kidney transplant recipeints. There are several well known risk factors of CVD, such as hyperlipidemia, hypertension, diabetes melitus, old age and smoking. Non-classic risk factors are acute rejection episode, LVH, C-reactive protein and hyperhomocysteinemia. Homocysteine is an amino acid filtered through the glomerulus and hyperhomocysteinemia is considered as a risk factor of CVD in end-stage renal disease (ESRD) and kidney transplant patients. So homocysteine lowering trials, such as folic acid and vitamine supplement therapy, are being made. We evaluated the prevelance and determinants of hyperhomocysteinemia in kidney transplant recipients. Methods : We measured serum total homocysteine concentration (tHcy) and its determinants in 21 normal persons, 37 chronic renal failure (CRF) patients with conservative treatment (predialysis) and 48 kidney transplant patients. Results : The prevalence of hyperhomocysteinemia was 4.8%, 83.8% and 45.8% among normal persons, predialysis and kidney tranplant patients, respectively. Among the kidney transplant recipients the prevelence of hyperhomocysteinemia was 18.8% in normal renal function (serum creatitine concentration male: below 1.2 mg/dL, female: below 1.1 mg/dL) group and 59.4% in abnormal renal function group. The tHcy values in kidney transplant patients are significantly lower than those in predialysis patients (16.38±6.48 μmol/L vs. 24.68±9.01 μmol/L, p<0.01), but higher than those in normal persons (16.38±6.48 μmol/L vs. 8.80±2.07 μmol/L, p<0.01). Among the kidney transplant recipients the tHcy values in normal creatinine group are significantly lower than those in abnormal creatinine group (12.02±3.68 μmol/L vs. 18.57±6.51 μmol/L, p<0.01). Using muliple regression analysis, this study showed increased serum creatinine concentration is a major determinant of tHcy concentrations in kidney transplant recipients and hyperhomocysteinemia is not correlated with whole blood trough level of cyclosporin (mean 126.26±62.19 ng/mL, range: 26∼322 ng/mL) or vitamines supplement therapy. Conclusion : In this study the serum homocysteine values in kidney transplant recipients were higher than in normal control group but significantly lower than in CRF patients with conservative treatment. The major determinant for serum homocysteine concentration is a serum creatinine concentration.(Korean J Med 63:306-313, 2002)

건조대추 첨가비율 및 저장기간에 따른 대추의 품질특성

최정실 ( Jeong Sil Choi ),여수환 ( Soo Hwan Yeo ),최지호 ( Ji Ho Choi ),최한석 ( Han Seok Choi ),정석태 ( Seok Tae Jeong ) 한국식품저장유통학회(구 한국농산물저장유통학회) 2013 한국식품저장유통학회지 Vol.20 No.1

This study was conducted not only to investigate the effects of rate of addition of dried jujube to Yakju but also to examine the quality changes in jujube Yakju during its storage. The results showed no significant differences in pH, total acidity, soluble solids, and anthocyanin and alcohol contents of the Yakju right after its fermentation. With the increase in the amount of jujube that was added, the lightness of the jujube Yakju changed from 93 to 94, its redness decreased, and its yellowness significantly increased. The jujube Yakju that was fermented with 1.5-percent dried jujube had high sensory evaluation scores for color, flavor, taste and overall acceptability. It had no significant changes in pH and total acidity during its storage after its heat treatment. Its soluble solids contents tended to decrease with its heat treatment and to increase in its storage period. With respect to its color changes during its storage, the higher the ratio of the jujube that was added, the longer the storage period was, the lightness and redness decreased and the yellowness increased. The polyphenol contents depended on the rate of addition of the dried jujube, but were not affected by the heat treatment and storage period. The organic acids in jujube yakju were citric acid, succinic acid, lactic acid, malic acod amd aceyoc acod.

갑상선암에서 PET 의 역할

여정석(Jeong Seok Yeo) 대한핵의학회 2002 핵의학 분자영상 Vol.36 No.3

The role of PET in the diagnosis and management of thyroid cancer is discussed. The major role of F-18 FDG PET is in patients with discordant negative I-131 scan and a positive serum thyroglobulin values. F-18 FDG PET scan localized metastatic sites in I-131 scan-negative thyroid carcinoma patients with high accuracy. F-18 PET is also valuable in medullary thyroid cancer with high calcitonin level. Focal thyroid uptake in patients with non-thyroidal diseas has high likelihood of thyroid cancer. (Korean J Nucl Med 2002;36;147-54)

도정도를 달리한 쌀누룩이 약주의 품질 변화에 미치는 영향

최정실(Jeong-Sil Choi),여수환(Soo-Hwan Yeo),최한석(Han-Seok Choi),정석태(Seok-Tae Jeong) 한국식품과학회 2017 한국식품과학회지 Vol.49 No.3

도정도를 달리한 쌀누룩이 약주의 가속 숙성에 따른 품질 변화에 미치는 영향을 알아보기 위해 도정도를 (0, 10, 30, 50, 및 70%) 달리한 쌀누룩으로 담근 약주를 45oC에서 2주간 가속 숙성한 후 약주의 이화학적 변화 및 관능적 특성(이취강도)을 살펴보았다. 그 결과, 처리구 간의 이화학학적 특성 분석 중 철, 망간의 함량을 제외하고 유의적인 차이를 나타냈다. 또한, 도정도에 따른 쌀누룩의 영향에 뚜렷한 경향은 보이지 않았지만, 아미노산의 경우, 대체적으로 도정도가 큰 쌀누룩을 사용할수록 작은 수치를 보였다. 숙성 전후의 약주의 특성 차이를 분석한 결과, 모든 처리구에서 숙성 후 갈색도(A<SUB>430</SUB>), 명도(L), 적색도(a), 황색도(b) 및 색차(ΔE)에서 유의적으로 증가됨을 알 수 있었다. 숙성 후 이취강도 검사(강함 5점, 약함 1점)에서는 도정을 하지 않은 쌀누룩(도정 0%) 사용 약주가 이취의 강도가 약함을 알 수 있었다. In this study, the effect of nuruk prepared from rice with different degrees of milling on the physicochemical and sensory qualities of yakju after accelerated aging was investigated. The results indicated significant differences, except for Fe and Mn contents, in the qualities of aged yakju prepared using nuruk from rice with different degrees of milling. However, the degree of milling of rice did not influence the quality of yakju, except for amino acidity and pH, which significantly decreased as the degrees of milling increased. In addition, as compared to before aging, brownness (A<SUB>430</SUB>) and color difference significantly increased after aging in all the treatments. The intensity of off flavor in yakju after aging made from 0% milled rice nuruk was the lowest.