Effect of Ultrasonic Melt Treatment on Solidification Microstructure of Al–5Ti–1B Alloy Containing Numerous Inoculant Particles

Soo‑Bae Kim,Jae‑Gil Jung,Young‑Hee Cho,Su‑Hyeon Kim,Kwangjun Euh,Jung‑Moo Lee 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.7

The effect of ultrasonic melt treatment (UST) on the solidification microstructure of an Al–5Ti–1B alloy containing highvolumefractions of Al3Tiand TiB2particles is investigated for various UST times with different melt holding times. Theas-cast Al–5Ti–1B alloy is composed of TiB2and polygonal Al3Tiparticles (present prior to UST), plate-like Al3Tiparticles,and Al grains (formed during UST and/or solidification). The UST causes a size reduction and homogeneous distributionof the TiB2-agglomerated region containing many submicron-sized TiB2particles pushed to the grain boundaries. The USTslightly decreases the size and improves the distribution of polygonal Al3Tiparticles enriched in the TiB2-agglomeratedregion. Unlike the TiB2and polygonal Al3Tiparticles, which exhibit a minor refining effect, the plate-like Al3Tiparticlesshow a significant refinement with UST application. The UST has a significant effect on the size distribution of Al grains byinducing the formation of medium-sized grains at the expense of small and large grains; however, it only has a slight effecton grain refinement. The degree of microstructure modification increases with increasing UST time but decreases with meltholding time after UST. The mechanisms for the refinement and dispersion of the TiB2and Al3Tiparticles and Al grains arediscussed considering fragmentation, nucleation, and growth behaviors induced by the UST and subsequent solidification.

Rifampicin에 의한 것으로 추정되는 위막성 대장염1예

김수현,이은우,정종혁,문승현,김동한,양혁승,오영상,김호동,김도현,박혁,박정환,박경옥,이영직 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.2

Pseudomembranous colitis, caused by altering the normal colonic flora and allowing the multiplication of Clostridium difficile, is an deleterious adverse effect of antibiotics. But it is rarely reported by rifampicin. Rifampicin is one of the first line drug in the treatment of tuberculosis and many patients are exposed to its potential adverse effects. We experienced a patient that had abdominal discomfort and hematochezia due to pseudomembranous colitis after receiving antituberculous medication, and which was probably caused by rifampicin. A 82 years old man was admitted with abdominal discomfort and hematochezia for one week. On the past history he had been diagnosed as endobronchial tuberculosis about 4 months ago. Colonoscopy revealed multiple discrete whitish mucosal lesion on rectosigmoid colon, and histologic findings were consistent with pseudomembranous colitis. The antituberculous agents were discontinued and vancomycin was administered. The patient's symptoms were resolved within several days. There was no recurrence after reinstitution of the antituberculous agents excluding rifampicin. We report here on a case of pseudomembranous colitis probably due to rifampicin.

대퇴동맥을 통한 경피적 관동맥 중재시술 환자의 천자부위 지혈을 위한 Angioseal^(�) 사용과 고식적 용수 압박법의 비교 : 전향적 연구

김용훈,권현철,김필호,안석진,유철웅,최진호,이상철,김준수,김덕경,전은석,이상훈,홍경표,박정의,서정돈 대한내과학회 2004 대한내과학회지 Vol.66 No.5

목적 : 경피적 관동맥 중재술은 최근 양적 및 질적으로 급격한 발전을 보였지만 시술 시 천자부위의 혈관 합병증은 아직 해결해야 할 문제점이다. 저자들은 대퇴동맥을 통한 경피적 관동맥 중재술을 환자에게 천자부위 지혈을 위한 혈관폐쇄기구인 안지오실의 안전성과 유용성을 고식적인 용수 압박법과 비교 연구하고자 하였다. 방법 : 2002년 4월부터 2003년 5월 사이에 삼성서울병원 심장혈관센터에서 대퇴동맥을 통한 경피적 관동맥 중재술을 성공적으로 시행한 200명의 환자(안지오실 사용군: A군, 100명, 고식적 용수압박법 사용군 B군, 100명)를 대상으로 시술 후 주요 합병증 및 경한 합병증, 지혈 후 환자가 자리에 앉기까지의 시간, 보행개시 가능시간, 총 재원 기간과 시술 1주 후의 합병증을 전향적으로 조사하여 비교 연구하였다. 결론 : 두 군에서 연령, 성별, 기저질환, 심혈관 질환의 위험요소, 시술의 종류, 시술 중 사용한 헤파린의 양, clopidogrel의 양, ticlopidine의 양, 지혈 시 수축기와 확장기혈압, ACT (activated clotting time)는 차이가 없었다. A군이 B군에 비해 시술 후 자리에 앉기까지의 시간 (A군: 4.3±0.3시간, B군: 13.7±0.8시간, p=0.004) 및 보행개시까지의 시간(A군: 6.8±0.5시간, B군: 18.8±2.1시간, p=0.013)이 유의하게 짧았다. 시술 후 주요 합병증은 두군 모두에서 관찰되지 않았으며, 경한 합병증의 전체발생은 A군에서 유의하게 적었다(A군: 28명, B군: 19명, p=0.003). 반상출혈의 경우는 A군에서 유의하게 낮았지만(A군: 3명, B군: 12명, p=0.01), 혈종, 출혈의 발생은 두군간에 차이가 없었다. 총 재원기간에는 두 군간에 차이가 없었다(p=0.239). 시술 1주 후 경과관찰에서 주요합병증은 역시 두 군 모두에서 관찰되지 않았으며, 경한 합병증의 전체발생은 두 군에서 차이가 없었다(A군: 15명, B군: 13명 p=0.418), 반상출혈의 빈도는 차이가 없었지만 혈종의 발생은 A군에서 더 낮았다(A군: 2명, B군:6명, p=0.004). 두 군 모두에서 출혈은 발생하지 않았다. 결론 : 대퇴동맥을 통한 경피적 관동맥 중재술을 시행한 환자에서 안지오실의 사용은 고식적 용수 압박법에 비해 환자의 침상 안정시간을 줄여 조기 활동개시가 가능하게 하였으며 국소합병증의 위험도를 일부 낮추어, 시술에 따른 환자의 불편을 현저하게 감소시킬 수 있다고 할 수 있을 것으로 기대된다. Background : Although the number and the quality of percutaneous coronary intervention have been recently increased dramatically, the vascular complication at puncture site is still the major cause of patients' morbidity. We evaluated the safety and efficacy of newly of newly-developed collagen-based arterial closure device, Angioseal after transfemoral percuatenous coronary intervention. Methods : This study was designed as a prospective single center non-randomized comparative study. A total 200 patients undergoing transfemoral percutaneous coronary intervention were enrolled between April 2002 and May 2003. They were divided into two groups; Angioseal group (group A, n=100) and manual compression group (group B, n=100). The baseline clinical and angiographic characteristics were reviewed. The time to sit up, the time to ambulation, the duration of hospital stay, major and minor vascular puncture site complications were monitored. The patients were followed-up for 1 week after procedure by telephone. Results : The baseline clinical characteriwtics, clinical diagnosis, cardiocascular risk factors, typesof procedure, doses and numbers of anticoagulants were similar between two groups. The blood pressure and activated clotting time were also similar. The time to sit up (group A: 4.3±0.3 hours, group B: 13.7±0.8 hours, p=0.004) and the time to ambulation (group A: 6.8±0.5 hours, group B: 18.8±2.1 hours, p=0.013) were shorter in group A. No major vascular complications were noted. The incidence of hematoma and bleeding were not significantly different between two groups. The incidence of ecchymosis, however, was significantly lower in group A (group A:12%, group B: 3%, p=0.001) The duration of gospital stay was similar between groups. During 7 days of follow-up period incidence of hematoma was significantly lower in group A (p=0.004). Although the incidence of ecchymosis was not significantly different between two groups. Conclusion : The angioseal may be associated with earlier ambulation and less patients' morbidity with low incidence of local complication rate compared to manual compression after transfemoral percutaneous coronary intervention.

열 변화에 의한 구리전선의 미세조직 및 상 변화에 관한 연구(Ⅲ)

박성우,김윤회,김상현,박남규,김수철,김영만 內務部 國立科學搜査硏究所 2002 國立 科學 搜査 硏究所 年報 Vol.34 No.-

Proportion And Characteristics Of Transient Nodules In A Retrospective Analysis Of Pulmonary Nodules

( Jin Yeong Yu ),( Su Young Chi ),( Hee Jung Ban ),( Yong Soo Kwon ),( In Jae Oh ),( Kyu Sik Kim ),( Yu Il Kim1 ),( Sung Chul Lim ),( Song Choi ),( Yun Hyeon Kim ),( Young Chul Kim ) 대한내과학회 2011 대한내과학회 추계학술대회 Vol.2011 No.-

Scrub Typhus : 확진된 76예의 임상 소견에 대한 전향적 연구

김동민,김현리,박치영,윤성호,송현제,심수경 대한감염학회 2006 감염과 화학요법 Vol.38 No.4

배경 : Orientia tsutsugamushi에 의한 인체 감염은 혈액과 임파선을 타고 전신에 퍼져 혈관 염을 일으켜, 전신 장기의 침범 소견을 보인다. 그러나 아직 까지 전신장기 침범에 대한 임상 소견 및 검사 결과의 전향적인 추적 관찰에 대한 연구는 거의 없는 실정이다. 재료 및 방법 : 조선대학교병원에 내원한 환자 중 확진법(gold standard)인 간접형광항체법(IFA)으로. 확인된 76명의 환자를 대상으로 내원시 임상 양상 및 검사 결과의 평가 및 치료 후 검사 결과의 변화에 대한 전향적인 연구를 수행하였다. 결과 : 대부분의 환자에서 발열, 갈증, 전신 쇠약감, 두통을 호소하였으며, 특이 할만한 소견으로 현재까지 보고되지 않았지만, 대부분의 환자가 갈증을 심하게 호소한다는 것이다. 3명의 젊은 건강한 환자를 제외한 대부분의 환자에서 이러한 갈증 증상을 호소하였으며, 이러한 갈증은 발열이 호전되어도 지속되었으며, 퇴원 이후에 까지 지속되는 양상을 보였다. 혈액검사상 scrub typhus 초기에 나타날 수 있는 신기능 장애 및 간 기능 장애는 대부분 가역적으로 적절한 항생제 투여 후 모두 정상으로 회복됨을 확인할 수 있었다. 혈액 검사상 CRP, LDH, AST가 대부분의 환자에서 상승하였고, 특히 LDH의 상승이100% 환자에서 관찰된 것은 특이할 만 한데 적절한 치료후 CRP는 신속히 호전을 보이나, LDH는 서서히 호전됨을 확인하였다. DIC 검사상 DIC는 입원환자의 95.5%에서 확인되었으나, 비교적 일부의 환자에서 출혈 및 경색이 초래되는 것으로 생각된다. 결론 : Scrub typhus 초기에 나타 날수 있는 신기능 장애, 간기능 장애 및 DIC는 대부분 가역적으로 적절한 항생제 투여 후 모두 정상으로 회복되며, 이러한 관찰이scrub typhus 환자의 진단 및 임상 경과의 이해에 도움이 되리라 사료된다. Background : Orientia tsutsugamushi spreads to the entire body through the blood and lymphatics, and it induces vasculitis that results in the patients manifesting symptoms of systemic organ involvement. Materials and Methods : We conducted a prospective study to evaluate the clinical manifestations and the change of the laboratory results after instituting treatment for scrub typhus. Results : Most patients presented with fever (100%), malaise (96.1%) and thirst (96.1%). It was remarkable that most patients presented with severe thirst, except for 3 healthy, young patients. This thirst was persistent even after the resolution of fever. The renal and hepatic dysfunction were reversible after the administration of appropriate antibiotics. For the blood testing, it was deteded that the CRP, and LDH were elevated in most patients (95.9% and 100% respectively). DIC could be diagnosed in 95.5% of the patients at the time of admission Conclusion : Most patients presented with fever, malaise and severe thirst, and the renal and hepatic dysfunction were reversible after the administration of appropriate antibiotics. DIC was observed in most of our patients, but hemorrhage and infarction were not present. CRP showed a rapid improvement, nonetheless, the LDH and DIC test results improved slowly.

상행성 운동마비와 보행 실조로 발현한 비전신성 혈관염성 신경병증 1예

김현석,김성민,권기한,이병철,신준현,강인수 대한노인병학회 1999 Annals of geriatric medicine and research Vol.3 No.4

입제농약을 활용한 벼 병해충 생력방제 연구

김정수,이종옥,강수웅,김재현 진주산업대학교 농업기술연구소 2003 農業技術硏究所報 Vol.16 No.-

The experiment was carried out to establish of labor-saving control system on paddy field transplanted young rice seedling by machine. We examined the effect of control value between conventional control method that applied 6 times to paddy field during cultivation period and labor-saving control method that applied systematic pesticide one time to the seed, to the nursery box at transplanting day and twice to the middle stage of rice cultivation. The control value in labor-saving control method of Laodelphax striatellus, Nephotettix cincticeps and Lissorhoptrus oryzophilus were 93.4%, 92.7% and 86.1% compared with untreatment field, respectively and also the labor-saving method was more efficient than conventional control method at early stage of rice cultivation. The control value in labor-saving method of Nilaparvata lugens, Sogatella furcifera, Cnaphalocrocis medinalis were more than 84% and these showed almost same trend with conventional control method. The control value in labor-saving method of leaf blast and panicle blast were 91.7%, 93.8%, that showed similar result with conventional control method. The control value in the nursery box at transplanting day of sheath blight was 83.6%, these result were better than conventional control method that applied 2 times at middle stage of rice cultivation.

植物 生長調整劑의 處理가 水稻幼苗의 蛋白質 含量 및 酵素 活性에 미치는 影響

金度勳,金賢勍,鄭大守 東亞大學校 1996 東亞論叢 Vol.33 No.-

A study was carried out to investigate the effect of growth regular on protein content, PAL and peroxidase activity in rice seedling plants, Akibare, a Japonica type variety. ABA(0.1, 1, 10ppm), 2.4-D(10, 100, 1000ppm), and GA(0.05, 0.5, 5ppm) were respectively treated for 5 days to the nee seedling plants which were grown for 20 days. The results were summarized as follows. In stems, the protein content showed the highest value in the plot treated with GA for 5 days, although ABA and 2.4-D treated plots showed no significant differences compared with the control. PAL activity in the plot treated with GA for 5 days and in the plot treated with 2.4-D for 10 days were respectively higher than control. On the contrary, it was low in the plot treated with ABA. PAL activity in roots was respectively higher in the plots treated with GA for 5days and 2.4-D for 10 darts than the control. According to increment of days seedling growth, peroxidase activity was respectively maintained in the plot treated with ABA, 2.4-D, and GA, although it was decreased in the control.

원발성 폐암 환자의 생존율에 관한 보고

김현태,이상무,어수택,박춘식,정성환,허승재,남충희,강창희,김용훈 순천향대학교 1994 논문집 Vol.17 No.4

We analysed 404 patients with primary lung carcinoma who were treated at Soonchunhyang University Hospital from July, 1985 to september, 1993 in order to investigate the survival rate and epidemiolgical properties of primary lung cancer. They were 330 males and 74 females. The most prevalent decade was seventh. In terms of cell type, the squamous cell was 225 patients (55%), and adenocarcinoma, small cell, mixed type was 21%, 19%, 4%, respectively. Among non-small cell lung carcinoma, stage Ⅲa was the most prevalent one(92%). In case of small cell carcinoma, the limited stage was 64%. The 12-, 24-, 36- month survival rate of total patients was 57%, 31%, 22%, respectivley and median sruvival time was 15 months. The 36-month survival rate tended to be longer in non-small cell lung carcinoma than that of small cell lung cancer, but there was no difference between two groups, statistically. In non-small cell carcinoma, The 36-month survival rate and meidan survival time were longer in the stage Ⅰ and Ⅱ than those of Ⅲa, Ⅲb, Ⅳ (80% versus 38%, 22%, 0%, p<0.05). According to involvement of lymph node, the 36-month survival rate was longer in NO and N1 than those of N2, N3 (61.9%, 48.7% versus 17.7%, 17.3%, p<0.05). In small cell carcinoma, The 36-month survival rate and median survival rate were higher and longer in limited stage than those of extensive stage(16.1% and 13 month vs 10% and 8 month, p<0.05). In conclusion, we report here the incidence of primary lung carcinoma and the survival rate of paients with primary lung carcinoma who were treated in Soonchunhyang University Hospital.