만성 골수성 백혈병에 합병된 Progressive Multifocal Leukoencephalopathy 1례

이주헌,이재홍,이규형 대한신경과학회 1996 대한신경과학회지 Vol.14 No.1

리튬 이온 2차전지용 Anode 재료의 제조와 그 특성 고찰

이주성,정윤이,변지형,박은성,유덕영 한양대학교 에너지·환경기술연구소 1997 에너지·環境技術論文集 Vol.3 No.-

Carbon materials, disordered carbon and KS6(graphite, Lonza), were studied as anode materials of lithium ion secondary battery. The disordered carbons were made from thermosetting resins (phenol resin, furan resin, acetylene resin and its mixed resin). The resins were carbonized in nitrogen gas at 1000℃. When the thermosetting resins were carbonized, an addition of lithium hydroxide improved capacity and cycle life, but decreased the efficiency of the first charge/discharge. Also, in this study, the capacity of the carbon from phenol resin was higher than that of the carbon from acetylene resin or furan resin. But, the carbon from mixed resin was the highest capacity of all the synthetic carbons.

진행된 원발성 간암의 방사선 치료와 병합된 온열요법

이형식,허원주 동아대학교의과대학 1992 동아의대학술지 Vol.4 No.1

十全大補湯加味方이 抗癌化學治療劑의 抗腫瘍效果 및 腫瘍細胞의 lysosomal enzymes에 미치는 影響

李炯柱,文錫哉 한국전통의학연구소 1997 한국전통의학지 Vol.7 No.2

十全大補湯加味方과 抗癌 化學療法劑인 mitomycin C의 倂用投與와 관련된 寶驗을 施行하여 아래와 같은 結論을 얻었다. 1. Ascites form of Ehrlich carcinoma에 十全大補湯加味方抽出物과 mitomycin을 倂用投與한 結果 十全大補湯加味方 抽出物에 의하여 mitomycin C의 抗腫瘍倂效果가 약간 增加하는 경향을 보였으며,마우스의 平均 生存期間도 增加하였다. 2. Solid form of Ehrlich ascites carcinoma에서 十全大補湯加味方 抽出物과 mitomycin C를 倂用投與한 結果 單獨投與時 보다 抗腫瘍效果가 더욱 뚜렷하여 腫瘍의 크기를 顯著하게 減少시켰다. 3. Ehrlich ascites carcinoma cell의 lysosomal enzymes의 총 活性度는 mitomycin C의 單獨投興時 보다 十全大補瘍加味方 抽出物의 投與時 顯著하게 蒸加하였으며,mitomycin C와 十숲大補瘍加味方 抽出物을 倂用投與한 경우에는 더욱 顯著하게 增加하였다. 4. 十全大補瘍加味方 抽出淚으로 前處理時 NK細胞의 標的細胞와의 結合能은 물론 結合된 標的細胞의 融解能도 促進되었다. 以上으로 보아 十全大補瘍加味方 抽出物이 자체로는 顯著한 抗腫瘍效果가 없다고 할지라도 腫瘍을 發生시킨 마우스의 生存率을 增加시키고,抗癌化學療法劑인 mitomycin C의 細胞毒性 및 NK細胞의 活性度를 亢進시키는 것으로 思料된다. Mainly side effects of antitumor chemotherapy are fatigue, G-I trouble(such as vomitting, nausea, diarrhea) and reduction of medullary function etc. Differentiated from syndromes in oriental medicine, above symptoms are recognized to "Deficiency of both ki(vital energy) and blood". And SDT(Sipjeondaebotang) has been widely used in "Deficiency of both ki(vital energy) and blood". SDTG(Sipjeondaebotanggamibang) consists of SDT plus several herb medicines-these have antitumor effect and reduce chemotherapheutic side effect. This experiment was undertaken to study the effects of SDTG on chemotheraphy. The results obtained in this study were as follows: 1. Antitumor activities of the ethanol extract from SDTG(Sipjeondaebotang -gamibang) and MMC(Mytomycin) on ascitis form of carcinoma in mice is a little improved. Especialy mean survival times of the group of SDTG(200mg/kg) and MMC(O.1mg/kg) is improved over 50%. 2. When SDTG and MMC is administrated together, the weight of tumor is more decreased than MMC alone. 3. 'The effect of the ethanol extract from SDTG and MMC on the lysosomal enzymes in Ehrich ascites carcinoma cell are more significantly improved than MMC alone. 4. SDTG extract increases both NKcell conjugation and cyto-lysis against target cell. According to the above results it is recognized that SDTG increases the chemotherapheutic effect of MMC and the activity of NKcell.

Cone beam형 전산화단층촬영법을 이용한 하악과두의 골변화에 관한 연구

이지운,김형섭,송주섭,김경아,고광준 대한구강악안면방사선학회 2007 Imaging Science in Dentistry Vol.37 No.3

Purpose : To assess bone changes of mandibular condyle using cone beam computed tomography (CBCT) in temporomandibular disorder (TMD) Patients. Materials and Methods : 314 temporomandibular joints (TMJs) images of 163 TMD patients were examined at the Department of Oral and Maxillofacial Radiology, Chonbuk National University. The images were obtained by PSR9000N (Asahi Roentgen Co., Japan) and reconstructed by using Asahivision software (Asahi Roentgen Co.,Japan). The CBCT images were examined three times with four weeks interval by three radiologists. Bone changes of mandibular condyle such as flattening, sclerosis, erosion and osteophyte formation were observed in sagittal, axial, coronal and 3 dimensional images of the mandibular condyle. The statistical analysis was performed using SPSS 12.0. Intra-and interobserver agreement were performed by 3 radiologists without the knowledge of clinical information. Results : Osteophyte (2.9%) was found more frequently on anterior surface of the mandibular condyle. Erosion (31.8%) was found more frequently on anterior and medial surfaces of the mandibular condyle. The intraobserver agreement was good to excellent(k=0.78-0.84), but interobserver agreement was fair(k=0.45). Conclusion : CBCT can provide high qualified images of bone changes of the TMJ with axial, coronal and 3 dimensional images.

Cephalosporium acremonium var. M-10에 의한 Cephalosporin C 생산에 관한 연구

이호근,현형환,오두환,유주현 연세대학교 산업기술연구소 1990 논문집 Vol.22 No.2

The microorganism which produces Cepholsoporin C, has been selected from Cephalosporium acromonium by U.V radiation. Among the mutants, Cephalosporium acremonium var. M-10 was showed the highest Cephalosporin C productivity. On the basis of physiologieal characteristics, the difference hetween Cephalosporium acremonium var. M-10 and Cephalosporium acromonium was that the mutant did not assimilate sodium acetate, potassium nitrate, sodium nitrate. By using Cephalosporium acremonium var. M-10, the optimum conditions for the production of cephalosporin C on the rotary shaker were pH 7.0 soluble starch 4.0 w/v%, (NH₄)₂SO₄0.75w/v%,, CaCl ₂w/v%, soy bean meal 2w/v%, oleic acid 0.09w/v%, methionine 0.3w/v%, at 30℃ for 120 hours, respectively. On the study of time course, it revealed that the peak appeared at the stationery phese. The amount of Cephalosgorin C produced in this medium by mutant was about two times larger than that by Cephalosporium acremonium.

치과용 금합금에 대한 금속 프라이머 처리와 열순환 처리가 교정용 브라켓의 전단결합강도에 미치는 영향

이영기,차정열,유형석,황충주 대한치과교정학회 2009 대한치과교정학회지 Vol.39 No.5

치과용 금합금에 교정용 브라켓 접착 시 금속 프라이머와 열순환 처리가 전단결합강도에 미치는 영향을 알아보기 위하여 80개의 치과용 금합금 시편을 샌드블라스팅만 처리한 군과 3종류의 금속 프라이머(Alloy Primer, Metaltite, V-Primer)처리를 시행한 군으로 분류하고, 이를 열순환 처리 시행 여부에 따라 모두 8개 군으로 분류하였다. 만능물성 시험기를 사용하여 브라켓의 전단결합강도를 측정하고, modified ARI (Adhesive Remnant Index) scores를 통해 브라켓 접착면의 파절 양상을 평가하였다. 열순환 처리 미시행 시에는 금속 프라이머의 적용 시 샌드블라스팅만 단독으로 처리한 경우에 비하여 통계적으로 유의성 있는 전단결합강도의 증가가 있었다 (p < 0.05). 열순환 처리를 시행한군에는 금속 프라이머의 처리에 의한 전단결합강도의 변화는 유의한 차이가 없었다 (p > 0.05). 금속 프라이머를 적용한 경우 열순환 처리 미시행 시에는 파절 양상이 브라켓과 접착제 계면에서의 파절 발생 빈도가 높았으나, 열순환 처리 시행 시에는 각 군 간 파절 양상에 유의한 차이가 없었다. 이상의 결과로 금속 프라이머의 적용이 치과용 금합금에 대한 교정용 브라켓 접착 시 초기 접착 강도에서는 유의성 있는 결합력의 증가를 보이나, 열순환 처리 시행 후에는 결합 강도에서는 유의한 차이가 없는 것으로 나타나 금속 프라이머에 의한 결합력 증가가 감소하는 것으로 생각한다. Objective: The aim of this study was to evaluate the effect of metal primers and thermocycling on shear bond strength between the orthodontic bracket and gold alloy. Methods: For this study, 80 specimens made of dental gold alloy were divided into 8 groups based on the combination of metal primers (none, Alloy primer, Metaltite, V-primer) and thermocycling (with and without thermocycling). Shear bond strength testing was performed with a universal testing machine. Bond failure sites were classified by a modified ARI (Adhesive Remnant Index) score. Results: All metal primer treated groups showed a significantly higher shear bond strength than the only sandblasting treated group without thermocycling (p < 0.05). There were no significant differences on shear bond strength in the groups with thermocycling (p > 0.05). Bond failure sites of the metal primer treated group without thermocycling occurred at gold alloy/adhesive interface, whereas there were no differences on bonding failure sites in the groups with thermocycling. Conclusions: These findings suggest that using metal primer on gold alloy enhances the initial bracket bond strength. But, this effect was not shown with thermocycling.

STS 304 강의 저주기 및 고주기 피로에 있어 초기 마르텐사이트의 영향

이현승,신형주,김송희 江原大學校 産業技術硏究所 2001 産業技術硏究 Vol.21 No.B

Zero to tension fatigue tests and strain controlled fatigue tests were carried out to find how initial strain induced martensite, α' affects low and high cycle fatigue behavior and fatigue crack growth mechanisms. Microscopic study and phase analysis were carried out with TEM, SEM, EDAX, Optical Microscope, Ferriscope, and X-ray diffractometry. The amount of Initial α' was controlled from 0% to 33% by controlling the temperatures for cold working and heat treatment. Lower contents of initial α' showed higher fatigue resistance in low cycle fatigue but lower fatigue resistance in high cycle fatigue because it is ascribed to the more transformation of α' martensite during low cycle fatigue and higher ductility. In high cycle fatigue, fatigue life is attributed to the strength and phase transformation of austenite into α' during fatigue was negligible. γ boundary, γ/twin boundary, and γ/α' boundary were found to be the preferred site of fatigue crack initiation.

알루미나-유리 복합체의 제조에 이용되는 유리의 조성에서 ZrO₂의 함량변화가 복합체의 기계적 성질에 미치는 영향

이주형,강동진,원대희,이민호,배태성 大韓齒科器材學會 2000 대한치과재료학회지 Vol.27 No.3

This study was performed to investigate the effect of ZrO2 addition in borosilicate glasses on the mechanical properties of alumina-glass composites. Porous alumina compacts were prepared by slip casing and sintered at 1100℃ for 2 hours. Dense composites were made by infiltration of molten glass into partially sintered alumina at 1200℃ for 6 hours. Specimens were polished sequentially from #800 to #2000 diamond disk, and the final surface finishing on the tensile side was received an additional polishing sequence through 0.3㎛ diamond paste. Biaxial flexure test was conducted by using ball-on-three-ball method at a crosshead speed of 0.5 mm/min. Fracture toughness was measured by a single edge V-notched beam (SEVNB) method with 2.5×5×20 mm rectangular bar. To examine the microstructural aspect of crack propagation in the alumina-glass composites, Vickers-produced indentation crack was made on the tensile surface at a load of 49.0 N and dwell time of 15 sec, and the radial crack patterns were examined by an optical microscope and a scanning electron microscope. The results obtained were summarized as follows: 1. The minimum biaxial flexure strength was obtained with an addition of 2 mol% ZrO₂ in glass composition and strength values increased with the increase of ZrO₂ content. 2. The minimum fracture toughness was obtained with an addition of 2 mol% ZrO₂ in glass composition and toughness values decreased with the increase of ZrO₂ content. 3. Fracture surfaces indicated the frictional interlocking of rough surfaces left behind the fracture front.

의복구성학의 연구주제 및 경향분석

이정순,나수임,배주형 복식문화학회 2001 服飾文化硏究 Vol.9 No.2

The purpose of this study is to recognize the real situation of clothing construction to present the desirable direction to establish more scientific and reasonable themes of the study by analysis of the tendency of the clothing construction study. For this purpose, 402 papers on the theme of clothing construction study were excerpted from the first issues to the issues of December in 1999 of Journal of Korea Society of Clothing and Textile, Journal of Korea Home Economics, Journal of the Korean Society of Costume, Research Journal of the Costume Culture, Journal of the Korean Fiber Society, and Journal of the Human Engineering Society of Korea, I analyzed and classified the theme into eight issues of design related clothing construction, study of body types, study of patterns, size of apparel, fitting of clothing, protective clothing and functional clothing, sewing, and the others. The result of the study is as follows. 1. The distribution tendency of the clothing construction study by the journal of each society showed that Journal of Korean Home Economics is 22.9%, Journal of Korea Society of Clothing and Textiles 17.3%, Research Journal of the Costume Culture 12.2%, and Journal of the Korean Society of Costume 6.2%. 2. The distribution tendency of the studying issues showed that study of body types is 29.4%, study of patterns 21.9%, fitting of clothing 11.7%, sewing 10.2%, size of apparel 8.5%, and others 7%, protective clothing and functional clothing 6.7%, and design related clothing construction 4.7%. Considering the above result, we can understand that study of body types and patterns are being studied most actively. 3. Regarding the study tendency by academic issues showed that study of construction elements and design application is chiefly centered of the study of design related clothing construction (35.5%), analysis of body types is centered of the study of body types (46.6%), CAD is centered of the study of patterns (31.1%), and size spec for the ready made patterns is centered of the study of size of apparel (32.4%). As for fitting of clothing, the study was performed in two ways on the changes of the surfaces of human bodies in motion and the functional features of experimental dressing. Regarding the study of sewing, study of fusible interlining was mainly performed (36.6%) and regarding the study of protective clothing and functional clothing, study of brassieres and underwear was chiefly performed. Key words : design related clothing construction(디자인관련 의복구성), study of patterns(의복 및 패턴 연구), size of apparel(의류치수), fitting of clothing(의복의 맞음새), protective clothing and functional clothing(특수복 및 기능복).