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강용호,박희완,장준섭,강군순 대한골절학회 1989 대한골절학회지 Vol.2 No.2
The importance of fixation of the medial malleolus was stressed in the treatment of ankle joint fractures in the early 60's; later more attention was paid to the effects of the treatment of the lateral malleolus. Fibular integrity is essential in stabilizing of the ankle joint. Loss of lateral mall- eolus may result in separation of the inferior tibiofibular joint, ankle instability and talus displacement Eventually this leads to traumatic arthritis. The authors experienced 3 cases of loss of lateral malleolus which were treated at Yongdong Severance hospital, Yonsei University College of Medicine. The results were obtained as follows; total loss of lateral malleolus leads to adduction instability of talus and slightly lateral talar shift, and partial loss of lateral malleolus leads to no lateral talar shift, But the results are obtained for short term and long term follow up is needed.
압전응용을 위한 $Ca_{3}NbGa_{3}Si_{2}O_{14}$ 화합물의 단결정 성장
강용호,정일형,오근호 한국결정성장학회 2001 韓國結晶成長學會誌 Vol.11 No.4
새로운 압전체인 $Ca_{3}NbGa_{3}Si_{2}O_{14}$(CNGS) 단결정은 Czochralski 법을 사용하여 결정성장을 이루었다. CNGS의 결정 구조는 $A_{3}BC_{3}D_{2}O_{14}$와 동방구조를 이루고 있음이 조사되어졌고, 단위 셀의 격자상수는 각각 a = 8.0873과 c = 4.979이었으며, 공간군은 P321이었다. 각각의 양이온의 분포는 각 자리에 규칙배멸을 이루고 있음을 보였다. CNGS 결정은 Langasite 보다 높은 품질계수, 전기기계결합계수, 압전성수를 나타내었으며, 이는 Langasite와 비교하여 낮은 탄성손실과 우수한 압전특성을 가짐을 보여주고 있다. New piezoelectric $Ca_{3}NbGa_{3}Si_{2}O_{14}$ (CNGS) single crystal was grown using the Czochralski technique. The crystal structure of CNGS was found to be isostructural with $A_{3}BC_{3}D_{2}O_{14}$. The unit cell parameters were a=8.087 and c=4.983 and the space group was P321. The distribution of each cation was found to be ordered in each site. Some piezoelectric properties of CNGS are showed.
강용호,김상달,남두현,Yoo-Seok Jeong,Hyo-Jin Yoo 한국생물공학회 2005 Biotechnology and Bioprocess Engineering Vol.10 No.6
Pseudomonas cepacia BY21 was found to produce glutaryl acylase that is capable of deacylating glu-taryl-7-aminocephalosporanic acid (glutaryl-7-ACA) to 7-aminocephalosporanic acid (7-ACA), which is a starting material for semi-synthetic cephalosporin antibiotics. Amino acids of the reported glutaryl acylases from various Pseudomonas sp. strains show a high similarity (>93% identity). Thus, with the known nucleotide sequences of Pseudomonas glutaryl acylases in GenBank, PCR primers were designed to clone a glutaryl acylase gene from P. cepacia BY21. The unknown -subunit gene of glutaryl acylase from chromosomal DNA of P. cepacia BY21 was cloned successfully by PCR. The -subunit amino acids of P. cepacia BY21 acylase (GenBank accession number AY948547) were similar to those of Pseudomo-nas diminuta KAC-1 acylase except that Asn408 of P. diminuta KAC-1 acylase was changed to Leu408.
APT(S) 제조 시 전기투석법을 이용한 H<sub>2</sub>WO<sub>4</sub>(Aq)내의 Na 제거 방법에 관한 연구
강용호,현승균,Kang, Yong-Ho,Hyun, Soong-Keun 한국자원리싸이클링학회 2017 資源 리싸이클링 Vol.26 No.6
APT (Ammonium paratungstate)는 금속절단 공구, 드릴의 날, 광산공구, 군사무기 재료 등 산업 전반에 다양한 용도로 사용되며, 고순도의 APT(S)를 제조하기 위해서는 $Na_2WO_4$ 수용액으로부터 전환된 $H_2WO_4$ 내의 불순물 정제 공정이 필요하다. 이미 널리 알려진 기존의 습식방법인 $Na_2WO_4$ 수용액에 HCl(Aq)을 첨가하여 $H_2WO_4(S)$을 제조하는 경우에는 불순물인 Na를 200 ppm 이하로 제거하는데 어려움이 있다. 이러한 점을 개선하기 위하여 본 연구에서는 양이온 격막을 이용한 전기투석 공정을 통해 Na를 제거하는 보다 경제적이고 효율적인 방법을 연구하였다. 폐 텅스텐 초경드릴 및 스크랩을 용해하기 위해 첨가되었던 $Na_2CO_3(S)$로 인한 $H_2WO_4$ 수용액 내의 다량의 Na를 전기투석 공정을 통해 20 ppm 이내로 제거함으로써 전기투석법 이용 시 Na 제거 효과가 큼을 확인하였다. APT (Ammonium paratungstate) is widely used in various industries such as metal cutting tools, drill bits, mining tools, and military inorganic materials. In order to produce high purity APT(S), an impurity purification step in an aqueous $Na_2WO_4$ convert $H_2WO_4$ solution is required. It is difficult to remove impurity Na of 200 ppm or less when $H_2WO_4(S)$ is prepared by adding HCl(Aq) to an aqueous solution of $Na_2WO_4$, which is a well-known conventional wet method. However, in this study, a more economical and efficient method of removing Na through electrodialysis using a cationic membrane was studied. A large amount of Na in aqueous solution of $H_2WO_4$ due to $Na_2CO_3(S)$ which was added to dissolve waste tungsten carbide drill and scrap was removed to 20ppm or less through electrodialysis process, and it was confirmed that the effect of Na removal was great when using electrodialysis.