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Ru를 도입한 TiO2의 합성과 산소를 이용한 알코올 산화반응 연구
김영용 ( Young Yeong Kim ),최명룡 ( Myong Yong Choi ),권기영 ( Ki Young Kwon ) 한국공업화학회 2014 공업화학 Vol.25 No.6
본 연구에서는 수열합성법을 이용하여, 한단계의 과정으로 TiO2와 Ru (Ruthenium)가 도입된 TiO2 (Rux/TiO2)를 합성하였다. 합성된 샘플의 결정성과 조성 및 형태를 X-ray diffraction (XRD)과 energy dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM)를 통하여 확인하였으며, Benzyl alcohol의 Benzaldehyde로의 산화반응에 촉매로서 적용하였다. 높은 선택성을 가지는 산화반응이 진행되었으며, TiO2에 도입된 Ru의 양이 증가할수록 촉매로서의 더 좋은 촉매활성을 보였다. We synthesized TiO2 (Rux/TiO2) incorporating TiO2 and Ru via an one-step hydrothermal method. The physical properties were characterized by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS) and transmission electron microscopy (TEM). The prepared samples were applied as a catalyst for the oxidation of benzyl alcohol to benzaldehyde using molecular oxygen (O2). Especially, the catalytic activities increased as the contents of ruthenium in TiO2 increased without the formation of any byproducts.
파쇄 동종골 감입 이식과 비구 보강환을 이용한 비구부 결손의 재건
성열보 ( Yerl Bo Sung ),이상림 ( Sang Lim Lee ),김영용 ( Young Yong Kim ),안재용 ( Jae Yong Ahn ),서정국 ( Jeong Gook Seo ),최윤석 ( Yun Seok Choi ),김지영 ( Ji Yeong Kim ) 대한고관절학회 2005 Hip and Pelvis Vol.17 No.4
목적: 비구부 결손에 대하여 파쇄 동종골 감입 이식법과 비구 보강환을 이용하여 재건한 결과를 분석하고자 하였다. 대상 및 방법: 1990년 3월부터 2000년 12월까지 상기 방법으로 시술한 73예(63명)를 대상으로 하였다. 수술 당시 평균 연령은 53.2세였으며, 평균 추시 기간은 7.6년이었다. 비구부 결손 정도는 AAOS 기준에 따라 분류하였으며, 임상결과는 Harris 고관절 점수로 판정하였다. 방사선 소견 상 보강환 고정나사나 고리의 파손이 있거나, 5 mm 이상의 수평 또는 수직 이동 그리고 5도를 초과하는 비구 경사각의 변화가 있는 경우에 방사선학적 실패로 판정하였다. 결과: 비구부 결손의 정도는 AAOS 분류 제 3형이 61예, 그리고 제 4형이 12예였다. Harris 고관절 점수는 시술 전 평균 43점에서 술 후 87점으로 향상되었다. 20예에서 중등도 이상의 서혜부 동통 및 파행 소견을 보였다. 방사선학적 판정 기준 상 총 생존율은 78.1%였다. 합병증으로는 심부 감염 6예, 혈관 손상 2예, 그리고 탈구가 4예 있었다. 결론: 금속 보강환을 이용한 동종골 감입 이식법은 심한 비구부 결손의 재건에 유용한 방법이지만 그 술식이 매우 위험하고 까다롭기 때문에 세심한 주의가 필수적이라 생각된다. Purpose: This study was undertaken to evaluate the effectiveness of morselized allograft impaction combined with acetabular reinforcement ring (ARR) for acetabular deficiencies. Materials and Methods: From March 1990 to December 2000, 73 hips (63 patients) were reconstructed by the above method. Mean subject age was 53.2 years and mean follow-up duration was 7.6 years. Acetabular deficiencies were classified by AAOS system. Clinical result was graded according to Harris hip scoring system (HHS). Radiographic failure was defined as a breakage of the screw and/or hook, a migration of 5 mm or more in either the vertical or horizontal direction and changes in the acetabular angulation over 5 degrees. Results: Acetabular deficiency was AAOS-type 3 in 61 hips and type 4 in 12. HHS was improved from 43 to 87 points. Moderate limping gait with groin pain was noted in 20 hips (27.4%). Overall radiographic survival rate was 78.1%. Complications were 6 infections (8.2%), 2 vascular injuries (2.7%), and 4 dislocations (5.5%). Conclusion: In the case of severe acetabular bone loss, revision surgery with metallic supporter combined with impaction graft is a useful method, but successful outcome is difficult to achieve. Careful attention throughout the procedure is mandatory.
결핵성 흉막염에서 흉막 비후가 동반된 환자와 동반되지 않는 환자의 초기 흉막 삼출액 소견에 관한 비교 연구
이승현(Sung Hyun Lee),윤지호(Ji Ho Yoon),이동채(Dong chea Lee),김대식(Dae Sig Kim),김영용(Yeong Young Kim),이진웅(Jin Woong Lee),윤태용(Tae Yong Yoon),김지운(Ji Woon Kim) 대한내과학회 2000 대한내과학회지 Vol.58 No.6
N/A Background : Indicator that can predict pleural thickening in pleural tuberculosis has not been known clearly. By the previous study, patients with pleural thickening ≥10 mm had significantly lower glucose and pH values and higher lysozyme and TNF-α values than those with pleural thickening 〈10 mm, but interferon-γ (IFN-γ) values were not significantly different. We studied the relationship between pleural thickening and biochemical, or immunologic finding in initial pleural fluid. Methods : We followed up 22 patients who had been diagnosed as pleural tuberculosis. four patients (18.1%) had pleural thickening ≥10 mm and 12 patient (54.5%) had pleural thickening ≥3 mm. Initial pleural fluid protein, LDH, pH, glucose and IFN-γ, Interleukin-1α (IL-1α) were studied. Results : Pleural fluid levels of protein, LDH, glucose, and IFN-γ were not statistically significant different not only between the group of pleural thickening ≥3 mm and the group of pleural thickening 〈3 mm, but also between the group of pleural thickening ≥10 mm and the group of pleural thickening 〈10 mm. The pleural fluid IFN-γ level, the group with pleural thickening ≥3 mm (85.9± 37.1 U/mL) was significantly higher than without thickening (44.8±32.0 U/mL) (p<0.05) and the group with pleural thickening≥10 mm (106.9±8.6 U/mL) was significantly higher than without thickening (58.5±8.6 U/mL)(p<0.001). Conclusion : Although patient number of our study was smaller than the previous study, IFN-γ level in initial pleural fluid of pleural tuberculosis may be considered as the predictive factor of pleural thickening.(Korean J Med 58:632-638, 2000)