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서윤종 전남대학교기업경영연구소 1997 經營情報 Vol.8 No.1
끝으로 상대적으로 낙후된 이지역의 중소기업 경쟁력 제고를 위해서는 기술력 향상이 당면 과제로 인식되지만 무엇보다도 기업 스스로의 자구노력과 투자의욕이 선행 되어야 할 것이며 아울러 대학의 적극적이고 능동적인 기럽과의 교류 활동과 현장 중심의 연구가 절실히 요구된다.
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P-11 : Effect of Nutrition Support with Percutaneous Endoscopic Gastrostomy Feeding
서윤종,차재명,김정태,이금주,강진선,김남은,예경남,이금아,이정숙,이현정,조미란,조재옥,최성일,최인정,현기선 한국정맥경장영양학회 2012 한국정맥경장영양학회 학술대회집 Vol.2012 No.-
Background: Enteral feeding via PEG tube is required for nutritional support in patient with dysphagia or impaired swallowing. PEG is used widely for gastrointestinal tract access to provide artificial feeding. PEG-fed patients get more of their prescribed feed. this study compared the nutritional support after PEG with that before PEG. Method and Patients: All consultations for PEG tube placement were evaluated by members of the gastroeneterology physician staff. Patients who underwent PEG from July 2006 to February 2012 at Kyung Hee University Hospital at Gangdong were 214. of these, 196 patients whose nutritional data could be collected were retrospectively investigated. we checked the nutritional support and requirement before and after PEG. Results: The ratio of total calory intake before PEG placement to that after PEG placement was 95.0±35.4%. and the ratio of total protein intake before PEG placement to that after PEG was 96.7±44.3%. the patients who got more than 90% of recommended calory requirement after PEG placement was 104 (52.5%). and the patients who got more than 90% of recommended protein requirement after PEG placement was 99 (50.0%). the mean duration to catch up more than 90% of recommended calory intake was 11.6±1.8 days and that of protein intake was 11.4±4.4days. Conclusion: This study showed enteral feeding via PEG tube increased nutritional supplementation and PEG to be beneficial.
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Sn-Bi-X계 땜납과 Cu 기판과의 계면반응 및 기계적 특성에 관한 연구
서윤종,이경구,이도재,Seo, Yun-Jong,Lee, Gyeong-Gu,Lee, Do-Jae 한국재료학회 1998 한국재료학회지 Vol.8 No.9
Sn-Bi-X(X:2Cu, 2Sb, 5In) 계 땜납과 Cu 기판과의 계면반응 및 기계적성질에 대하여 고찰하였다. Cu판과 땜납의 접합부는 $100^{\circ}C$에서 60일까지 열처리하여 광학현미경, SEM, EDS,분석을 통하여 시효처리에 따른 미세조직과 계면반응을 분석하였으며, 인장강도 및 연신율은 제조된 시편을 30일까지 열처리 한 후 0.3mm $\textrm{min}^{-1}$로 인장하여 시험하였다. 미세조직 분석결과 Cu의 첨가로 미세조직이 미세화 됨을 알 수 있으며, 계면에 형성된 화합물은 첨가원소에 따라 다르게 나타났다. 인장시험 결과 열처리 초기에는 땜납쪽에서의 파괴가 발생하였으나 열처리 시간이 증가하면서 계면반응층고 땜납의 계면에서 파괴가 발생하였다. 열처리에 따른 인장강도는 Cu를 첨가한 경우에 가장 높은 값을 나타냈다. Interfacial reaction and mechanical properties between Sn-Bi-X ternary alloys(X : 2Cu. 2Sb 5In) and Cu-substrate were studied. Cu/solder joints were subjected to aging treatments for up to 60days to see interfacial reaction at $100^{\circ}C$ and then were examined changes of microstructure and interfacial compound by optical microscopy, SEM and EDS. Cu/solder joints were aged to 30days and then loaded to failure at cross head speed of 0.3mm $\textrm{min}^{-1}$ to measure strength and elongation. According to the result of EDS, it is supposed that the soldered interfacial zone was composed of $\textrm{Cu}_{3}\textrm{Sn}$ and $\textrm{Cu}_{6}\textrm{Sn}_{5}$. According to the tensile test of Cu/solder joint, joint strength was decreased by aging treatment. Fractographs of Cu/Sn-Bi solder detailed the effect of aging on fracture behavior. When intermetallic was thin, the fracture occurred through the solder. But as the interfacial intermetallic is thickened, the fracture propagated along the intermetallic/solder interface.
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Sn-Bi-Ag 계 땜납과 Cu 기판과의 젖음성 , 계면 반응 및 기계적 성질에 관한 연구
서윤종,이경구,이도재 ( Youn Jong Seo,Kyung Ku Lee,Doh Jae Lee ) 한국주조공학회 1997 한국주조공학회지 Vol.17 No.3
N/A Solderability, interfacial reaction and mechanical properties of joint between Sn-Bi-Ag base solder and Cu-substrate were studied. Solders were subjected to aging treatments to see the change of mechanical properties for up to 30 days at 100℃, and then also examined the changes of microstructure and morphology of interfacial compound. Sn-Bi-Ag base solder showed about double tensile strength comparing to Pb-Sn eutectic solder. Addition of 0.7wt%Al in the Sn-Bi-Ag alloy increase spread area on Cu substrate under R-flux and helps to reduce the growth of intermetallic compound during heat-treatment. According to the aging experiments of Cu/solder joint, interfacial intermetallic compound layer was exhibited a parabolic growth to aging time. The result of EDS, it is supposed that the soldered interfacial zone was composed of Cu_6Sn_5.
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서윤종,차재명,이정일,주광로,신현필,박재준,전정원,임준욱,전승정,문수영,이치훈,조미란,이정숙 대한장연구학회 2013 Intestinal Research Vol.11 No.2
목적: 경피적 내시경위루술(percutaneous endoscopic gastrostomy, PEG)은 가장 흔히 이용되는 장기간 인공 장관영양법으로 그 안전성과 임상적 유용성은 많이 보고되어 왔지만, PEG의 영양 공급 개선 효과에 대한 연구는 아직까지 국내에서 시행된 적이 없었다. 따라서 이번 연구에서는 PEG 시행 전후의 영양 공급 개선 효과에 대해 연구하였다. 방법: 2006년 6월부터 2012년 2월까지 강동경희대학교병원에서 PEG를 시행한 196명 환자의 의무기록을 후향적으로 분석하였다. PEG 시행 전후로 열량 및 단백질을 포함한 영양 공급 개선 효과를 비교 분석하였다. 결과: PEG 시행 후 영양 공급이 유의하게 증가하여 평균 113 kcal (기저값의 13.5%)의 열량과 평균 4.8 g (기저값의 17.5%)의 단백질을 추가 공급할 수 있었다(각각 P=0.001). 권장영양량의 90% 이상을 공급할 수 있었던 환자들도 유의하게 증가하였는데, PEG 시술 전과 비교하여 PEG 시술 후 권장영양량의 90% 이상을 공급할 수 있었던 환자들이 열량과 단백질에 대해 각각 25.4%와 20.2%씩 증가하였다(각각P=0.001). 권장영양량의 90% 이상을 공급하는 데 걸리는 시간은 약 11일(열량, 11.6±4.4일; 단백질, 11.4±4.4일)이 필요하였다. PEG 시술 관련 합병증은 8.1%의 경증 합병증이 관찰되었고, 조기 사망은 발생하지 않았다. 결론: PEG 시술은 환자들의 영양 공급 상태를 개선시킬 수 있는 효율적인 시술임과 동시에 비교적 안전한 시술이다. Background/Aims: Percutaneous endoscopic gastrostomy (PEG) is the most common method of enteral nutrition for pa-tients who require long term artificial nutrition. PEG has been used as a method of nutritional support; however, improvement of nutritional support via PEG has not yet been reported. In this study, we analyzed the efficacy of nutritional support via PEG. Methods: We conducted a retrospective analysis of 196 consecutive patients who underwent PEG at Kyung Hee University Hospital in Gang Dong from 2006 to 2012. We analyzed clinical characteristics, the method of nutritional support, and the pro-portion of intake to establish recommendations for nutritional requirements and the duration needed to reach the level of ap-propriate nutrition. Results: A total of 196 patients included 130 men and 66 women, and their mean age (standard deviation)was 69.1±14.0 years. Compared with caloric and protein supplementation before PEG, 113 kcal (13.8% of baseline) and 4.8 g of protein (17.5% of baseline) could be additionally supplied with PEG (P=0.001, respectively). The number of patients who could take more than 90% of the recommended requirements of caloric and protein supplementation after PEG showed increased caloric and protein intake by 25.4% and 20.2%, respectively, in comparison with those before PEG (P=0.001 and P=0.001, re-spectively). The mean duration of catch-up for more than 90% of the recommended caloric and protein intake was approxi-mately 11 days. Procedure related complications and early mortality were reported in 8.1% and 0% of patients, respectively. Conclusions: PEG is an effective and safe nutritional support method for patients who require long term artificial nutrition. (Intest Res 2013;11:120-126)
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증례 : 소화기 ; 원발성 간암의 신생물딸림증후군으로 표현된 다발성근염과 횡문근융해
서윤종 ( Yoon Jong Seo ),장재희 ( Jae Hee Jang ),박자비 ( Ja Be Park ),주정철 ( Jung Chul Joo ),정재일 ( Jei Il Jung ),조혜제 ( Hye Jae Jo ),곽재규 ( Jae Gyu Kwak ) 대한내과학회 2012 대한내과학회지 Vol.82 No.2
다발성근염은 사지 근위부의 골격근을 대칭적으로 침범하는 원인불명의 자가면역 질환으로, 악성종양과 동반된 사례가 보고되고 있으나 피부 근염에 비해 드물다. 이에 혼합간세포-담관상피암종으로 추정되는 원발성 간암의 신생물딸림증후군에 의한 횡문근융해와 다발성근염 1예를 경험하여 보고하는 바이다. Polymyositis is characterized by symmetrical proximal muscle weakness, nonsuppurative inflammation of skeletal muscle, elevation of muscle enzyme levels, and abnormality of electromyographical change. Its pathogenesis is unclear. Paraneoplastic syndromes are caused by malignant tumors, although not through direct effects of the primary tumor or its metastases. Several paraneoplastic syndromes, including erythrocytosis, hypoglycemia, and hypercholesterolemia, have been reported in patients with hepatocellular carcinoma. A few cases of polymyositis associated with hepatocellular carcinoma and one case of combined hepatocellular-cholangiocarcinoma associated with polymyositis and chronic hepatitis B virus infection have been reported. Skeletal muscle injuries without trauma, including metabolic myopathy, effects of certain drugs and toxins, infection, electrolyte imbalances, and endocrine disorders, may cause rhabdomyolysis. We present here a case of primary liver cancer associated with polymyositis and rhabdomyolysis. (Korean J Med 2012;82:212-216)
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