염산용액(鹽酸溶液)에서 Tri-Butyl Phosphate(TBP)에 의한 주석(朱錫)(IV)의 용매추출(溶媒抽出)

서재성,안재우,이만승,Seo, Jae-Seong,Ahn, Jae-Woo,Lee, Man-Seung 한국자원리싸이클링학회 2010 자원리싸이클링 Vol.19 No.3

Solvent extraction behavior of Sn(IV) from hydrochloric acid solution was investigated using TBP(Tri-butyl Phosphate) as an extractant. The experimental parameters, such as the concentration of HCl solution, chloride ions, extractant, and Sn were observed. Experimental results showed that the extraction percent of Sn was increased with increasing the hydrochloric acid and chloride ion concentration. More than 98% of Sn was extracted in 7.0 M HCl by 10% TBP. The optimum extraction stages of Sn for continuous extraction process was theoretically calculated by analysizing the McCabe-Thiele diagram. Stripping of Sn from the loaded organic phases can be accomplished by NaOH as a stripping reagent effectively and 99.3% of Sn was stripped by 2.0M NaOH solution.

외상성 반월상 연골 파열의 관절경적 절제술 후 장기 추시 결과

서재성,민학진,윤의성,김희선,김윤종,김유미,Seo, Jae-Seong,Min, Hak-Jin,Yoon, Ui-Seong,Kim, Hee-Seon,Kim, Yoon-Jong,Kim, Yoo-Mih 대한관절경학회 2005 대한관절경학회지 Vol.9 No.2

Purpose: To study the long-term outcome of arthroscopic meniscectomy with regard to clinical symptoms and radiographic signs of osteoarthritic change. Materials and Methods: The materials for the investigation consisted of 79 individuals among 144 patients who underwent knee arthroscopy due to an isolated meniscal tear from October 1990 to September 1992 in our hospital. Those 79 individuals were followed up for $10{\sim}15$ years after the knee arthroscopy and were took clinical examination through the review of knee radiographies obtained with weight bearing. 52 of the 79 patients were men, and the mean age of the total materials was 34.6 years old (in the range $17{\sim}48$). Results: At follow-up, radiographic changes including Fairbank changes and joint space narrowing were seen from 45 of the 79 patients (56.2%). In other calculation, radiographic changes were seen in 23 out of 54 patients (42.6%) who had a partial meniscectomy, but were presented in 22 out of 25 patients (88.0%) who had a total meniscectomy. As a result, more radiographic changes were seen after total meniscectomy (p=0.03). In clinical results, 39 out of 54 patients (72.2%) after partial meniscectomy were satisfactory, and 14 out of 25 patients (56.0%) after total meniscectomy were satisfactory, therefore, more percentage of patients were satisfactory in partial meniscectomy group than in total meniscectomy group, but the statistical differences were absent (p=0.24). Conclusion: The frequency of radiographic changes in $10{\sim}15$ years after meniscectomy was related to the quantity of the meniscus removed, but the differences of these changes were low and had little influence on activity and knee function.

지방 종괴의 진단에 대한 MRI의 판별 능력

서재성,안종철,김정래,최준혁,조길호,신덕섭,Seo, Jae-Sung,Ahn, Jong-Chul,Kim, Jeong-Rae,Choi, Jun-Hyuk,Cho, Kil-Ho,Shin, Duk-Seop 대한근골격종양학회 2005 대한골관절종양학회지 Vol.11 No.1

Purpose: This study was designed to know the usefulness of the MRI to distinguish lipoma and well differentiated liposarcoma (WDL). Materials and methods: 47 lipomatous tumors with MRI were reviewed among the 107 lipomatous tumors operated in our department. MRI examinations and their corresponding pathology reports were compared to determine sensitivity, specificity, diagnostic ability, positive predictable value and negative predictable value. Statistical analysis was performed to know the relationship between malignancy of the tumor (WDL) with the age and gender of the patients, and location, depth, size and the enhancement of tumors in MRI. Results: Among 28 lipoma in MRI examinations, 26 were proved as lipoma in pathology, and only 6 were WDL from 19 suspicious lesions in MRI, and others were proved as lipoma variants mostly. The varieties of lipoma variants were fibrolipoma, angiolipoma, spindle cell lipoma, lipoblastoma and angiomyolipoma. The sensitivity, specificity, diagnostic ability, positive predictable value and negative predictable value of MRI were 100%, 68 %, 72%, 31% and 100% in WDL, and 90%, 89%, 89%, 93% and 84% in lipoma. Among the variants to distinguish WDL and lipoma, the size of tumor and enhancement in MRI were significant statistically (p<0.05). Conclusion: MRI was highly sensitive in detection of WDL and highly specific in detection of simple lipoma. The size of tumor and enhancement in MRI were significant variants to distinguish WDL and lipoma. When MRI finding is non-specific, it is more likely to represent one of lipoma variants.

인공 슬관절 전치환술 시 압박대의 압력에 따른 대퇴부 동통과 실혈량에 대한 영향

서재성 ( Jae Seong Seo ),민학진 ( Hak Jin Min ),윤의성 ( Ui Seoung Yoon ),김진수 ( Jin Soo Kim ),조기현 ( Ki Hyun Jo ),김용훈 ( Yong Hoon Kim ),박철희 ( Cheol Hee Baak ) 대한슬관절학회 2008 Knee Surgery and Related Research Vol.20 No.2

Purpose: We wanted to analyze the effects of tourniquet pressure on the postoperative thigh pain and blood loss of patients who undergo total knee arthroplasty. Materials and Methods: This prospective randomized study focused on one-hundred sixty-one unilateral total knee arthroplasties that were done with using a tourniquet. The tourniquet pressures were 300 mmHg in group I (seventy-four cases) and 100 mmHg higher than the systolic blood pressure in group II (eighty-seven cases). We analyzed the postoperative thigh pain with using a visual analog scale (VAS), and we assessed the hemoglobin levels and the hematocrits. Results: The incidence of postoperative thigh pain in group II was statistically lower than that of group I. The intensity of the postoperative thigh pain of group II was lower than that of group I at both 6 hours and 72 hours after surgery. There were no statistical differences in blood loss between the two groups. Conclusion: Using a tourniquet pressure of 100 mmHg above the systolic blood pressure during total knee arthroplasty can reduce the postoperative thigh pain. When comparing the above technique with a TKA using 300 mmHg of tourniquet pressure, there was no statistically significant difference of the postoperative blood loss.

Non-reamed True / Flex Humerus rod 을 이용한 상완곡 간부 골절 치험례

서재성(Jae Sung Seo),이동철(Dong Chul Lee),김상돈(Sang Don Kim) 대한골절학회 1994 대한골절학회지 Vol.7 No.1

Recently, surgical intervention of the fractures of the humeral shaft was increased due to the severe trauma occuring in the traffic accident and industrial accident, even if closed treatment was appropriate in the humeral diaphysis. In order to obtain the early mobilization prevention of the nonunion and joint stiffness, rigid fixation of the fracture is needed. To reduce the complication of the open reduction (nonunion, infection, radial nerve palsy), closed intramedullary nail fixation techinques without opening the fracture site were used. Eight cases of the fractures of the humeral shaft were treated with nonreamed True/Flex humerus rod system(intramedullary fixation) between Nov.1992 and Apr.1993. And the obtained results were as follows 1. The normal healing cases were 5 and its average healing time is post-op. 9.2 weeks. There were nonunion in 1 case and delayed union in 2 cases. 2. The causes of the injury were traffic accident in 6 cases fall down in 1 case, belt injury in 1 case. 3. The causes of the nonunion and delayed union were as follows distraction(by inappropriate selection of the rod and physical treatment) in 2 cases, insufficient immobilzation in 1 case. 4. The True/Flex humerus rod seemed to recommand to the patients with multiple, open, segmental fractures and poor qeneral condition.

골 이식술 및 내고정술로 치료한 수근 주상골 불유합

서재성(Jae Sung Seo),안면환(Myun Whan Ahn),장우석(Woo Seok Jang) 대한골절학회 1996 대한골절학회지 Vol.9 No.2

There is difficuity in the treatment of scaphoid nonunion, because of it is not easy to diagnosis scaphoid fracture after affecting the damage, and also of inadequate treatment. We have performed wedge bone Graft and internal fixation in treatment of 52scaphoid nonunions from April, 1986 to June, 1994. We got result as below by analysis of 27 cases which could follow up more than one year. 1, The most frequent age of fracture is the 3rd decade and the fracthre is more frequent in men (26 cases)than in woman (1 case). 2. The X-ray fingings of nonunion are bony sclerosis (13 cases), cystic change(3 cases), and absorption of fracture line (11 cases). 3. The mean period of bony union is 14.7 weeks. 4. In 8 cases there has been dorsal intercalated segmental instability(DISI) on preoperative X-ray finding and which is corrected after operation. 5. In evaluatory system by Herbert and Fischer about degree of patient's satisfaction, the grade 0 is 15 cases, grade 1 is 11 cases and grade 2 is 1 case, in clinical results, grade 0 is 15 cases, grade 1is 9 cases and grade 2 is 3 cases, in radiographic result, grade 0 is 22 cases, grade 1 is 4 cases, grado 2 is 1 case.

부모용 유아 놀이 선호도 검사도구의 타당화 검증

서재성(Seo JaeSung),이성균(Lee SungKyun),박대근(Park DaeGuen) 한국열린유아교육학회 2009 열린유아교육연구 Vol.14 No.1

이 연구의 목적은 캐나다에서 개발된 부모용 유아 놀이 선호도 측정도구(Finegan et al., 1991)를 우리나라에 적용하여 개념적, 통계적 타당화를 검증하는 데 있다. 이 연구의 대상자는 서울지역 중산층인 만 4, 5, 6세 유아의 부모 295명이었다. 문항분석 결과, 부모들의 응답과정을 거친 15문항은 탐색적 요인분석결과 활동-모험 놀이, 운동놀이, 거친 놀이, 그리고 조용한 놀이의 네 가지로 나타났다. 첨도와 왜도는 모두 .57∼-1.10범위 안에, 문항과 전체척도간의 상관관계는 모든 문항이 .40이상의 높은 신뢰도를 갖고 있었다. 부모에 의해 유아의 놀이 선호도를 검사하는 이 검사도구는 유아 놀이 선호정도와 밀접한 연관성이 있음이 증명되었다. 확인적 요인분석결과, 4요인 14문항과 3요인 13문항 모두 적합도지수를 수용하고 있었다(CFI, GFI:.90; RMR: .048: RMSEA; .079). 만약 부모용 유아 놀이 선호도 검사도구의 문항을 3개 요인으로 구성한다면, 활동-모험 놀이와 운동놀이를 한 요인으로 간주할 수 있다. 연구결과, 부모용 유아 놀이 선호도 측정도구는 문항 신뢰도와 타당도가 안정성 있게 검증되었다. This study attempts to conceptually and statistically validate the Play Activity Questionnaire(PQ), a parent report measure of children's play preferences developed in Canada(Finegan et al., 1991). This study surveyed 295 middle class parents of 4-to 6-year-old children. In the result of questionnaire analysis, the 15-item PQ was completed by parents of children, and exploratory factor analysis revealed four play factors: Active and Adventurous, Athletic, Rough-and-Tumble, and Quiet. In addition, both krutosis and skewness have reliability within the range from .57 to -1.10, and interrelationship between questionnaire and all scales has high reliability of more than .40 for all questions. The Play Activity Questionnaire(PQ), a parent report measure of children's play preferences indicates that it has a close connection with children's play preferences. In the result of confirmatory factor analysis, all of 14 questions for 4 factors and 13 questions for 3 factors accepted person-fit index(CFI, GFI:.90; RMR: .048: RMSEA; .079). Accordingly, if PQ is consisted of 3 factor, 'Active and Adventurous' and 'Athletic' can regard as one factor. In the research result, validation of a parent report measure of children's play preferences was verified stably in terms of reliability and validity of questions.

골수 이식술의 효과적인 전처치

서재성(Jae Sung Seo),장우석(Woo Seok Jang) 대한골절학회 1996 대한골절학회지 Vol.9 No.3

The purpose of this study was to determine. the effective preparation of a bone marrow graft by centrifugation. The experimental 4 groups were divided into Group A(5min/400G), group B(7min/400G), group C(10min/400G), and Group D(5min/600G) after aspiration of 12 case bone marrows. The results were as follows: Group A and Group B were not effective preparations of a bone marrow graft as seen in the total cell count and the viable cell count. Group C was the most effective preparation of a bone marrow graft among 4 groups. Group D had a the less viable cell count than Group C but the viable cell count was enough to record.

자가 슬건과 슬개건을 이용한 관절경적 전방십자인대 재건술의 단기 추시 결과 비교

서재성(Jae Sung Seo),이동철(Dong Chul Lee),손욱진(Oog Jin Shon),장우혁(Woo Hyuk Jang),김세동(Se Dong Kim) 대한정형외과학회 2006 대한정형외과학회지 Vol.41 No.1

무용 삶의 질 척도 타당화

서재성(Seo, Jae-Sung),김수경(Kim, Soo-Kyung) 한국코칭능력개발원 2022 코칭능력개발지 Vol.24 No.1