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Phentermine Hydrochloride에 의한 급성 근시와 전방각 폐쇄 1예
구성현,최원석,이종욱,박영정,이규원,Sung Hyun Koo,Won Suk Choi,Jong Wook Lee,Young Jeung Park,Kyoo Won Lee 대한안과학회 2011 대한안과학회지 Vol.52 No.7
Purpose: To describe a case of bilateral acute myopia and acute angle-closure associated with phentermine hydrochloride, a drug used for obesity treatment. Case summary: A 25-year-old woman visited our hospital with blurry vision and ocular pain after taking phentermine hydrochloride for three weeks. Manifest refraction accompanied myopic shift in the both eyes, slit-lamp examination showed forward displacement of the lens-iris diaphragm and fundus examination revealed retinal folds. Suspecting phentermine hydrochloride induced acute myopia and acute angle closure, discontinuation of the drug and administration of cycloplegic agents and antiglaucomatic agent successfully resolved the symptoms. Conclusions: Although the exact mechanism is unknown, phentermine hydrochloride may generate ciliochoroidal effusion and ciliary edema, lead to acute myopia and acute angle closure resulting from forward displacement of the lens-iris diaphragm. J Korean Ophthalmol Soc 2011;52(7):881-886
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비화학양론조성을 갖는 Ti3Al 합금에 관한 슬립과 변형쌍정
이종욱,김일봉,박영구,이광로,화전수치 대한금속재료학회(대한금속학회) 1998 대한금속·재료학회지 Vol.36 No.5
Compression tests for a single crystalline and polycrystalline Ti₃Al alloys of the hexagonally ordered DO_(19) structure deformed in compression were carried out to determine a temperature range in which deformation twinning is induced. Deformation twinning does not occur in a single crystalline Ti₃Al alloys. Prism plane slips are activated when single crystalline Ti₃Al alloys are compressed in the vicinity of the a axis. On the other hand, pyramidal and basal plane slips are activated when single crystalline Ti₃Al alloys are compressed in the vicinity of the c axis. In a polycrystalline Ti₃Al alloys, deformation twinning does occur in the temperature range of 1073K to 1373K only in Ti-34㏖%Al alloy. Dominant deformation twinning system is identified as [101￣1] (1012￣) in the temperature range of 1073K to 1373K. The volume fraction of deformation twins increases with increasing temperature in the temperature range of 1073K to 1273K. With further increasing temperature, however, the volume fraction of deformation twins decreases. The volume fraction of deformation twins increases with increasing total strain at 1173K and 1273K. Non-a dislocations and APBs in Ti-34㏖%Al alloy are visible in the temperature range induced deformation twinning.
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Al-Al_2O_3粒子强化 複合材料에 있어서 合金造成에 따른 微細組織의 變化
이종욱,서찬열,박영구 전북대학교 공업기술연구소 1991 工學硏究 Vol.22 No.-
AI-AI_2O_3 particulate reinforced composites were investigated. The effect of alloying elements was studied for their microstructural features, dispersion behaviors, reaction products at the interface, concentration lamellas of alloying elements around particles and microhardness from matrix to matrix/particle interface. AI-AI_2O_3 composites were prepared by compocasting method The results are as follows : for homogeneous dispersion of AI_@O# particles in the matrix, a certain amount of MG or CA is required. Those are 0.3 wt.% Mg or 0.! wt.% ca. in the case of AI-Cu/AI_2O_3 composite, some AI_2O_3 particles in Al-Si/Al_2O_3 composite tends to change the acicular eutectic silicons for equiaxed eutectic silicons. X-3ay diffraction studies reveal that some reaction products were formed by certain chemical reactions at the matrix/particles interfaces. The reaction products were MgAl_2O_4, CaAl_2O_4, Al_2SiO_5, CaO, MgO, caAl_4O_7, Cu_2MgO_3 and so on. those phases were thought to improve the wettability and to uniform dispersion of Al_2O_3 particles in the matrix. The concentration lamellas of alloying elements were observed around particles by EPMA. The microhardness of the matrix/particles interfaces is higher than that of matrix due to those reaction products..
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Al-Al_2O_3 입자분산 복합재료의 제조조건과 합금원소 첨가에 따른 분산성에 관한 연구
서찬열,이종욱,박영구 전북대학교 공업기술연구소 1990 工學硏究 Vol.21 No.-
Al-Al_2O_3 particulate reinforced composites were prepared by compocasting. The dispersion behaviors of Al-AL_2O_3 particles at different processing method and allying elements addition were examined by optical microscope, image analyser and X-ray diffraction. The dispersion of AL_2O_3 particles in the Al-Cu matrix alloy could not be detected however it was found to improve the dispersion by the addition of Ca, Si or Mg in Al or Al-Cu alloy. And the dispersion and recovery of Al_2O_3 particle in the ternary Al-Cu-Mg and Al-Cu-Ca matrix alloys wer better than the binary alloy. After mixing and reheating treatment the agitation was necessary to improve the dispersion. The longer the holding time of the melt before solidification, the more flotation of the agglomerates of the particles occured, and so agglomerates and shrinkage cavities in the ingot were reduced. But the dispersion of the fine particles in the rapid cooled ingot were improved. Finally, X-ray diffraction studies exhibited that Al_2siO5, MgO, MgAl_2O_4, CaO, Caal_2O_4 and Cu_2MgO_3 were formed at the interface of Al/Al_2O_3 And those product phases were though to improve the wettability of particles, also it may have played a helpful role of thier dispersion in the melts
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