Antiadhesive effect and safety of oxidized regenerated cellulose after thyroidectomy

Kyoung Sik Park,Kyu Eun Lee,Do Hoon Ku,Su-Jin Kim,Won Seo Park2,Hoon Yub Kim3,,Mi Ra Kwon1,Yeo-Kyu Youn1 대한외과학회 2013 Annals of Surgical Treatment and Research(ASRT) Vol.84 No.6

Purpose: To evaluate the antiadhesive effects and safety of an oxidized regenerated cellulose (Interceed) after thyroidectomy. Methods: Seventy-six thyroidectomized patients were prospectively randomized into two groups with regard to the use of Interceed. We evaluated each group for their adhesive symptoms using four subjective and four objective items at the 2nd week, 3rd and 6th month after thyroidectomy. All patients were examined for vocal cord motility by indirect laryngoscope at each period. Results: Total adhesion scores at each postoperative follow-up period decreased with time, but were not significantly different in each group. The median score for swallowing discomfort for liquid was significantly lower in the Interceed group than in the control group 2 weeks after surgery. In addition, the severity of skin adhesion to the trachea was reduced in the Interceed group compared with the control group 6 months after surgery. During the study, there were no adverse effects or significant differences in postoperative complications between the groups. Conclusion: Interceed appeared to be safe and effective in improving neck discomfort at early postoperative periods and preventing skin adhesion to the trachea 6 months after thyroidectomy.

효과적인 유역관리를 위한 CN기법 기반의 침투량 산정 및 기저유출량 분석

김희원 ( Hee Won Kim ),신연주 ( Yeon Ju Sin ),최정헌 ( Jung Heon Choi ),강현우 ( Hyun Woo Kang ),류지철 ( Ji Chul Ryu ),임경재 ( Kyoung Jae Lim ) 한국물환경학회 2011 한국물환경학회지 Vol.27 No.4

Increased Non-permeable areas which have resulted from civilization reduce the volume of groundwater infiltration that is one of the important factors causing water shortage during a dry season. Thus, seeking the efficient method to analyze the volume of groundwater in accurate should be needed to solve water shortage problems. In this study, two different watersheds were selected and precipitation, soil group, and land use were surveyed in a particular year in order to figure out the accuracy of estimated infiltration recharge ratio compared to Web-based Hydrograph Analysis Tool (WHAT), The volume of groundwater was estimated considering Antecedent soil Moisture Condition (AMC) and Curve Number (CN) using Long Term Hydrologic Impact Assessment (L-TH1A) model. The results of this study showed that in the case of Kyoung-an watershed, the volume of both infiltration and baseflow seperated from WHAT was 46.99% in 2006 and 33.68% in 2007 each and in Do-am watershed the volume of both infiltration and baseflow was 33.48% in 2004 and 23.65% in 2005 respectively. L-TFIIA requires only simple data (i.e., land uses, soils, and precipitation) to simulate the accurate volume of groundwater. Therefore, with convenient way of L-TKIA, researchers can manage watershed more effectively than doing it with other models. L-THIA has limitations that it neglects the contributions of snowfall to precipitation. So, to estimate more accurate assessment of the long term hydrological impacts including groundwater with L-THIA, further researches about snowfall data in winter should be considered.

체육교사의 리더십 유형과 고등학생의 체육수업 만족에 관한 연구

김흥태(Heung-Tae Kim),신진원(Jin-Won Shin),최경호(Kyoung-Ho Choi) 한국엔터테인먼트산업학회 2011 한국엔터테인먼트산업학회논문지 Vol.5 No.4

본 연구는 체육교사의 리더십 유형에 따른 고등학생의 체육수업 만족을 규명하는데 목적이 있다. 이 연구의 목적을 규명하기 위하여 경기도 성남시에 소재하고 있는 5개 고등학교 1, 2학년생 500명을 대상으로 편의추출법(convenience sampling)으로 총 487부를 회수하였고, 그 중 442부가 분석에 사용되었으며, SPSS 13.0 Windows 프로그램을 이용하여 타당도와 신뢰도 검증, 빈도분석, t-검증, 그리고 표준중다회귀분석을 실시하여 다음과 같은 결론은 얻었다. 첫째, 일반적 특성에 따른 고등학생의 체육수업 만족은 성별에 따라 교사만족, 사회성함양, 수업용이는 남자가 여자보다 높았고, 수업만족, 수업평가는 여자가 남자 보다 높게 나타났으며, 학년별에 따른 고등학생의 체육수업 만족은 모두 1학년이 2학년보다 높게 나타났다. 둘째, 체육교사의 리더십 유형과 고등학생의 체육수업 만족과의 영향 관계는 긍정적 보상형으로 수업을 할수록 고등학생의 체육수업 만족은 높아지는 것으로 나타났다. 이와 같이 고등학교 체육교사의 리더십과 학생간의 체육수업 만족에 대한 결과를 바탕으로 향후 바람직한 학교체육의 방향을 논의하는 기초적인 자료로써 활용되기를 바란다. This study is aim to define high school students" satisfaction based on the type of leadership in a physical education teacher in high school physical education classes. To investigate this study, we used "convenient sampling" to 500 high school students who are in 1st and 2nd grade in Kyoung-gi-do and recollected 487 copies, and SPSS 13.0 windows program was used for verifying a frequency analysis and reliability analysis, t-test and a standard multiple regression analysis. And they were conducted by all of the following conclusion was obtained. First, in terms of satisfaction on teachers, social propensity and class satisfaction, there is statistical significance that male students have more positive attitude than female students. Female students showed higher satisfaction on the class satisfaction and test method in the physical education class. It showed that the first grade students have higher satisfaction than the second graders according to the grade survey. Second, students" satisfaction became higher and higher when physical education teachers gave more positively reward to them related on their satisfaction and effect in the physical education class. Thus, we hope that this data will be used as a basic data to discuss the direction on the right school physical education between teachers" leadership and students" satisfaction in physical education class.

해군 근무환경에서 노출될 수 있는 염화알루미늄의 피부독성 예방을 위한 보호크림 개발 및 효능평가

박창용(Chang-Yong Park),어원석(Won Souk Eoh),이준원(Joon-Won Lee),오영현(Young-Hyun Oh),정미경(Mi Kyoung Jung),김병직(Byungjick Kim2) 한국해군과학기술학회 2023 Journal of the KNST Vol.6 No.3

하수처리장 적용을 위한Semi-카플란 수차가 장착된 마이크로수력발전 시스템

채규정(Kyu Jung Chae),김동수(Dong Soo Kim),천경호(Kyung Ho Cheon),김원경(Won Kyoung Kim),김정연(Jung Yeon Kim),이철형(Chul Hyung Lee),박완순(Wan Soon Park) 大韓環境工學會 2013 대한환경공학회지 Vol.35 No.5

소수력발전은 하수처리장 에너지 자립을 위한 효과적인 대안이다. 본 연구는 유량변동이 크고 유효낙차가 낮은 중소형하수처리장(기흥레스피아) 적용을 위해 피치조절형 세미카플란(semi-kaplan) 마이크로수력발전의 적용 타당성을 평가하였다. 가변피치 semi-kaplan 수차는 유량조절을 위한 가이드베인은 생략하고 피치조절형 런너를 장착하여 기계적 결함은 줄이면서 유량변동이 큰 처리장에 특화된 기술이다. 마이크로수력발전 시스템은 설계조건(유량 0.35 m3/s, 유효낙차 4.7 m)에서 90.2%의 수차효율 달성이 가능하였고 발전용량은 13.4 kW로 산정되었다. 설비가동률 74%로 가동 시 연간 약 86.8 MWh 에너지 생산을 통해 2.1%의 에너지 자립이 가능하고 이는 연간 49톤의 CO₂ 감축효과와 맞먹는다. 경제성 평가결과 초기 건설공사비가 200,000,000원 이하인 경우에는 내부수익률은 6.1%, 순현가는 15,539,000원, 편익-비용률은 1.08, 투자회수년은 15.5년으로 경제성이 충분한 것으로 나타났다. Small scale hydropower is one of most attractive and cost-effective energy technologies for installation within sewage treatment plants. This study was conducted to evaluate the potential of a semi-kaplan micro-hydropower (MHP) system for application to sewage treatment plants with high flow fluctuations and a low head. The semi-kaplan MHP is equipped with an adjustable runner blade, and is without a guide vane, so as to reduce the incidence of mechanical problems. A MHP rating 13.4 kWp with a semi-kaplan turbine has been considered for Kiheung Respia sewage treatment plant, and this installation is estimated to generate 86.8 MWh of electricity annually, which is enough to supply electricity to over 25 households, and equivalent to an annual reduction of 49 ton CO₂. The semi-kaplan turbine showed a 90.2% energy conversion efficiency at the design flow rate of 0.35 m3/s and net head of 4.7 m, and was adaptable to a wide range of flow fluctuations. Through the MHP operation, approximately 2.1% of total electricity demand of Kiheung Respia sewage treatment plant will be achievable. Based on financial analysis, an exploiting MHP is considered economically acceptable with an internal rate of return of 6.1%, net present value of 15,539,000 Korean Won, benefit- cost ratio of 1.08, and payback year of 15.5, respectively, if initial investment cost is 200,000,000 Korean Won.

Obesity induced by high fat diet in Rhomboid family member 2 (Rhbdf2) KO mice

Sung-Jun Kim(Sung-Jun Kim),Seul Gi Park(Seul Gi Park),Young-Sub Byun(Young-Sub Byun),Eun-Kyoung Kim(Eun-Kyoung Kim),Sang-Mi Cho(Sang-Mi Cho),Harim Kim(Harim Kim),Young-Suk Won(Young-Suk Won),Hyoung-Ch 한국예방수의학회 2017 한국예방수의학회 학술대회자료집 Vol.2017 No.-

Combined effects of a chemically cross-linked porcine collagen membrane and highly soluble biphasic calcium phosphate on localized bone regeneration

Kim, You-Kyoung,An, Yin-Zhe,Cha, Jae-Kook,Lee, Jung-Seok,Jung, Ui-Won,Choi, Seong-Ho The Korean Dental Association 2018 대한치과의사협회지 Vol.56 No.12

Objectives: Aim of this study was to evaluate bone regenerative efficacy of a chemically cross-linked porcine collagen membrane (CM) when used in combination with highly soluble biphasic calcium phosphate (BCP). Materials and methods: Physiochemical properties of the experimental collagen membrane were analyzed. Four circumferential defects with diameter of 8 mm were created in each calvarium of New Zealand white rabbits (n = 10). Defects were randomly allocated to one of following 4 groups: 1) BCP-CM (BCP (20% hydroxyapatite/80% ${\beta}$-tricalcium phosphate) covered with the prepared collagen membrane), 2) BCP (only BCP used), 3) CM (only the prepared collagen membrane used), and 4) C (control; only blood clot). After 2 weeks (n = 5) and 8 weeks (n = 5), histologic and histomorphometric analyses were performed. Results: The experimental collagen membrane exhibited dense and compact structure, relatively high tensile strength and lower degradability. Histologic analyses revealed that new bone increased rapidly at 2 weeks, while defect was preserved at 8 weeks. Histomorphometric analyses revealed that the new bone areas increased in the BCP-grafted groups over 8 weeks, with BCP-CM exhibiting greater total augmented area than that of BCP group both at 2 weeks ($27.12{\pm}3.99$ versus $21.97{\pm}2.27mm^2$) and 8 weeks ($25.75{\pm}1.82$ versus $22.48{\pm}1.10mm^2$) (P < 0.05). Conclusions: The experimental collagen membrane successfully preserved localized defect for 8 weeks despite early rapid resorption of BCP. Within the study limitations, combined use of the chemically cross-linked porcine collagen membrane and highly soluble BCP aided localized bone regeneration.

Sarcopenia: An Independent Predictor of Mortality in Community-Dwelling Older Korean Men

Kim, Jung Hee,Lim, Soo,Choi, Sung Hee,Kim, Kyoung Min,Yoon, Ji Won,Kim, Ki Woong,Lim, Jae-Young,Park, Kyong Soo,Jang, Hak Chul Oxford University Press 2014 Journals of Gerontology. Series A Vol.69 No.10

<P><B>Background.</B></P><P>The concept of sarcopenia has expanded recently to include muscle strength or physical performance. We investigated whether the Europe Working Group on Sarcopenia in Older People (EWGSOP) definition of sarcopenia predicts the risk of all-cause mortality in community-dwelling older adults.</P><P><B>Methods.</B></P><P>This study included 284 men and 272 women aged 65 and older. The outcome was all-cause mortality during the 6-year follow-up period. We defined sarcopenia based on the EWGSOP definitions of sarcopenia: height (ht)- or weight (wt)-adjusted appendicular skeletal muscle mass (ASM/ht<SUP>2</SUP> or ASM/wt) assessed by dual-energy x-ray absorptiometry, leg muscle strength, and short physical performance battery test score.</P><P><B>Results.</B></P><P>During the 6-year follow-up, 40 men and 19 women died. The risk of death was 2.99 times and 3.22 times higher in men with sarcopenia identified by ASM/ht<SUP>2</SUP> and ASM/wt, respectively, compared with nonsarcopenic men. The hazard ratio for death was 5.37 for men with weak leg muscle strength. Men with a low short physical performance battery score had a 3.15 times higher risk of death compared with those with high short physical performance battery scores, even after adjusting for all covariates. The adjusted hazard ratios for EWGSOP-defined sarcopenia were 4.00 for ASM/ht<SUP>2</SUP> and 6.89 for ASM/wt in men. By contrast, sarcopenia defined by these criteria was not associated with a higher risk of death in women.</P><P><B>Conclusions.</B></P><P>Our data suggest that, in older men, EWGSOP-defined sarcopenia is related to higher mortality compared with nonsarcopenia regardless of the ASM/ht<SUP>2</SUP> or ASM/wt index. In older women, further studies with large sample sizes are needed to assess whether EWGSOP-defined sarcopenia increases the mortality risk.</P>

Pooled nucleic acid testing to identify antiretroviral treatment failure during HIV infection in Seoul, South Korea

Kim, Sun Bean,Kim, Hye Won,Kim, Hyon-Suk,Ann, Hea Won,Kim, Jae Kyoung,Choi, Heun,Kim, Min Hyung,Song, Je Eun,Ahn, Jin Young,Ku, Nam Su,Oh, Dong Hyun,Kim, Yong Chan,Jeong, Su Jin,Han, Sang Hoon,Kim, Ju Informa Healthcare 2014 Scandinavian journal of infectious diseases Vol.46 No.2

<P><I>Background</I>: There have been various efforts to identify less costly but still accurate methods for monitoring the response to HIV treatment. We evaluated a pooling method to determine if this could improve screening efficiency and reduce costs while maintaining accuracy in Seoul, South Korea. <I>Methods</I>: We conducted the first prospective study of pooled nucleic acid testing (NAT) using a 5 minipool + algorithm strategy versus individual viral load testing for patients receiving antiretroviral therapy (ART) between November 2011 and August 2012 at an urban hospital in Seoul, South Korea. The viral load assay used has a lower level of detection of 20 HIV RNA copies/ml, and the cost per assay is US$ 136. The 5 minipool +algorithm strategy was applied and 43 pooled samples were evaluated. The relative efficiency and accuracy of the pooled NAT were compared with those of individual testing. <I>Results</I>: Using the individual viral load assay, 15 of 215 (7%) plasma samples had more than 200 HIV RNA copies/ml. The pooled NAT using the 5 minipool + algorithm strategy was applied to 43 pooled samples; 111 tests were needed to test all samples when virologic failure was defined at HIV RNA ≥ 200 copies/ml. Therefore, 104 tests were saved over individual testing, with a relative efficiency of 0.48. When evaluating costs, a total of US$ 14,144 was saved for 215 individual samples during 10 months. The negative predictive value was 99.5% for all samples with HIV RNA ≥ 200 copies/ml. <I>Conclusions:</I> The pooled NAT with 5 minipool + algorithm strategy seems to be a very promising approach to effectively monitor patients receiving ART and to save resources.</P>

Evaluation of sensitizer and photosensitizer by non-radioactive local lymph node assay (LLNA) using BrdU with flow cytometry

Kyoung-Mi Jung,Won-Hee Jang,Young-Ho Park,Bae-Hwan Kim,Kyung-Min Lim 한국실험동물학회 2012 한국실험동물학회 학술발표대회 논문집 Vol.2012 No.2