실시간 홀로그램간섭계를 이용한 In-Ceram과 금속 하부구조의 변형에 관한 비교 연구

장현주,우이형,이성복 慶熙大學校 齒科大學 1995 慶熙齒大論文集 Vol.17 No.2

Porcelain jacket crown and metal ceramic crown are representative esthetic restorations for full veneer crowns. Genarally, Porcelain jacket crown is more esthetic and closer to natural tooth appearance. However it is brittle and subject especially to tensile stress. Recently, a new reinforced porcelain for substructure, In-Ceram(VITA Zahnfabrik, Germany) was developed. This new reinforced porcelain is stronger than all other existing porcelain material and, can be widely used as one of the substructure materials. This study compared the deformation of In-Ceram and metal substructures for the stress of 5, 7 9, 11, 13, 15kg forced to the each lingual slope with 30 degree angle. Metal substructure was casted with 3 kinds of metals precious(Degudent H, Degussa, Germany), semiprecious(Degupal U, Degussa, Germany), nonprecious(Rexillum IQ, Rexillium, U.S.A.). Real time holographic interferometry was used for analysing the stress of these samples. This holographic interferometric analysis can evaluate the whole aspect of deformation without any morphological limitations and analyze finite deformation of samples by um and can be used on the idential samples not on computer model nor any other simulations. The results obtained were as follows 1. When the load by Max. 15kg was added to the lingual slope of each samples, in all cases of In-Ceram, Degudent H, Degupal U, Rexillium III substructures, tensile deformation on the labial aspect and compressive deformation on the lingual aspect were increaced from the cervical to incisal region. 2. When the surface deformation of each substructure was compared , In-Ceram showed uniform stress distribution without any flexion of its surface. In the metal substructures, Rexillium III on the labial aspect, Degupal U on the lingual aspect showed uniform surface deformation without any flexion. 3. In the case of Degudent H, severe changes of fringe patterns appeared at the incisal resion of labial aspect & whole lingual aspect, therfore interpretation of interferogram was not possible in this study: 4. When compared the Max. deformation of labial surfaces, In-Ceram showed least deformation in the load of 5,7,9kg and also in the load of 11,13,15kg except Rexillium M. When compared the Max. deformation of lingual surfaces, In-Ceram showed greatest deformation in all loading condition. 5. In the respect of stress distribution, In-Ceram was not disadvantageous. Holographic interferometry has a few methodological limit for the small dental restoration anlysis relatively great dynamic force condition. But as noncontact and nondestructive stress analyzing method, it is valuable to analyze 'finite deformation and more studies needed to apply it.

정상인과 체육인의 교합상태에 대한 정성적·정량적 비교 연구

장정미,최대균,이성복 慶熙大學校 齒科大學 1995 慶熙齒大論文集 Vol.17 No.2

This study was accompolished to analyze and compare the number and area of the occlusal contact points in healthy volunteers and athletes with nonrial occlusion. For this study, 15 athletes(13 amles and 2 females with average age 20) and 21 healthy volunteers(14 mles and 7 females with average age 20.09) were selected. The visual display acquired by scanning of occlusal record in maximal intercuspation was converted into 16 gray value image. Then, using computer program(] & Lee Occlusal Analyser), the pixel which was in definite range of the gray value was recognized, and the numbers of recognized pixel were calculated to area. The results were as follows ; 1. The average numbers of total alusal contact points were 31.05 in control group, and 34.67 in athlete group. The average area of total occlusal contacts was 100.25mm2 in control group, and 127.78mrn in athlete group. 2. In control group, the average numbers of occlusal contact points were revealed in order as follows the first molar(8.48). the secondmolar(8.24), the second premolar(4.71), the lateral incisor(2.90), the first premor(2.43), the central incisor(2.19), and the canine(2.1). The least average in canine(2.1) was similar to the average(2.19) in central incisor and (2.09) in lateral incisor. In athlete group, the average numbers of occlusal contact points were revealed in order as follows ; the first molar(8.87), the secondmolar(8.47), the second premolar(5.60), the canine(3.80), the lateral incisor(3.33), the first premnolar(2.67), and the central incisor(1.93). 3. In ' control group, the average areas of occlusal contact surface were revealed in order as follows ; the first molar(39.47mm'), the second molar(37.54mu>'), the second premolar(9.541d) the first premolar(6.18mm'), canine(3.49mn?), the central incisor(2.76mn?), and the lateral incisor(1.28mm'). In athlete group, the average areas of occlusal contact surface were revealed in order as follows ; the first molar(44.l1mm'), the second molar(40.69mm'), the second premolar(16.50mm'), the first premolar(9.39mm'), the canine(5.08 mm'), the lateral incisor(3.7mni), and the central incisor(2.25mmT 4. With aging in both control and athlete group, there was a decreasing tendancy in average number of occlusal contact point, and was an increasing tendancy in average area of occlusal contact surface. In comparison at each age, both the numbers and area of occlusal contact were greater in athlete group than in control group. It was not significant in the numbers of occlusal contact points beween athlete and control group(p>0.1), but significant in the area of occlusal contact surface(p<0.05). 5. In comparision as to the kind of sports(Gymnastics : 2, Rugby : 3, Soccor : 5, Ice hocky : 5), the numbers Of occlusal contact points were the most in ice hocky, and the area of occlusal contact surface was the greatest in gymnastics. With increasing a career in athlete group, there was a decreasing tendancy in average numbers of occlusal contact points and was an increasing tendancy in average area of occlusal contact surface. By 'I'-scan analyzing, the contact numbers on the anterior teeth were greater in control group than in athlete group, and on the posterior teeth were greater in athlete group than in control group. And the results aquaired by T-scan were lesser than that aquaired by the silicone bite records. It was not significant in the posterior teeth, but significant in the anterior teeth. In T-scan records, the numbers of occlusal contact points on second molar were the greatest, but rn the silicone records, the numbers on first molar were the greatest.

상황버섯박의 사료화에 관한 연구

장석훈,김성복,이봉덕,이수기 충남대학교 농업과학연구소 2008 농업과학연구 Vol.35 No.2

This experiment was conducted to investigate the feed value of Phellinus linteus meal. The chemical composition and particle size of Phellinus linteus meal was determined, and investigated the effect of partial substitution(0, 5, 10 and 20%) of dried Phellinus linteus meal on metabolizability and serum IgG concentration of layers. Crude fiber content of Phellinus linteus meal was higher, and crude protein and crude fat contents were similar level compare to corn, barley, and wheat. Dry matter metabolizability of Phellinus linteus meal was lower in 10 and 20% treatment than those of 0 and 5% treatment significantly(p<0.05). But, Phellinus linteus meal did not affect concentration of serum IgG. 본 시험은 상황버섯박의 사료가치를 조사하기 위하여 화학적 성분을 분석하고, 산란계를 이용하여 급여수준(급여사료의 0, 5, 10 및 20%)에 따른 대사율과 혈청 IgG 농도를 조사하였다. 영양적 조성에 있어서는 섬유질성 단미사료수준 이상의 영양소를 함유하고 있으며, 산란계에 대한 대사율은 대조구에 비하여 상황버섯박 10 및 20% 첨가구가 유의하게 낮은 결과를 보였다(p<0.05). 그리고 혈청 IgG 농도에 있어서는 첨가수준에 따른 유의적인 차이를 발견할 수없었다. 위 결과로 볼 때 상황버섯박은 섬유질 함량이 높아 단위 동물의 사료로는 제한적 사용이 불가피하며, 버섯의 약리성분은 추출잔류물이라는 특성으로 볼 때 그 작용을 기대하기는 어려울 것으로 판단된다. 또한 상황버섯박은 섬유질 함량이 높은 것으로 보아 단위 동물보다는 반추동물의 사료로 이용하는 것이 유리할 것으로 생각된다.

Cyclohexane과 n-Hexane 混合物의 液膜分離에 있어서 界面活性劑가 미치는 影響

張性福,鄭泰秀 成均館大學校 科學技術硏究所 1993 論文集 Vol.44 No.1

In the separation of cyclohexane-n-hexane mixture byliquid surfactant membrane in a batch system, the effects of surfactants on the separation factor and stability of membrane were investigated over the surfactant concentration ranging from 0.1 to 1.5%. The surfactants used were sodium lauryl sulfate, triethanolamine lauryl sulfate and ammonium lauryl sulfate. The separation factor reached its maximum value at the surfactant concentration of 0.5 wt% for all surfactants and in general triethanolamine lauryl sulfate showed larger separation factor than the other two surfactants. The separation factor reached its maximum value at the emulsification speed of 1600 rpm for sodium lauryl sulfate, and 1400 rpm for triethanolamine lauryl sulfate and ammonium lauryl sulfate. The value of the separation factor was highest at the emulsification time of 10 minutes for sodium lauryl sulfate and triethanolamine lauryl sulfate, and 5 minutes for ammonium lauryl surfate. The value of the separation factor was highest at the emulsion contact time with solvent of 5 minutes for all three surfactants and decreased with increasing contact time.

모 연취급장 근로자들의 연폭로지표들과 혈압과의 관련성

임상복,김용배,이용진,리갑수,김화성,황규윤,장봉기,이성수,안규동,이병국 순천향대학교 산업의학연구소 1998 순천향산업의학 Vol.4 No.1

In order to investigate the relationship between blood lead with other lead exposure indices and blood pressure in occupationally lead exposed male workers, 629 workers(515 lead exposed workers and 114 non lead exposed workers) in a storage battery factory were studied. Blood lead(PbB), zinc protoporphyrin(ZPP) and urinary δ-aminolevulinic acid(ALAU) were selected as an index of lead exposure. Height and weight were also meaured with calibrated automatic height-weight machine to produce fatness index directly. Personal information on smoking and drinking history were also collected. Blood pressure was mearured by trained nurses with automatic sphingomanometer. All workers took at least 30 minute rest before their measurement of blood pressure. The results obtained were as follows: 1. The prevalence rate of hypertension of lead exposed and non-exposed workers were 3.5% in both group without any difference. 2. There were no differences of systolic and diastolic pressure between groups divided by lead exposure, smoking habit, drinking habit. but the increase of age group made the difference of diastolic pressure, and only differenct of systolic pressure observed in age group of less than 20 and that of more than 40. 3. In pearson's correlation analysis, PbB was correlated with systolic pressure significantly, but not with diastolic pressure. PbB was also correlated with pressure difference(systolic pressure-diastolic pressure). 4. There were no significant increase of systolic, diastolic pressure and pressure difference by the increase of PbB and ZPP grouping. 5. Stepwise multiple regression analysis using systolic pressure as dependent variable and PbB, ZPP, ALAU, age, work duration, smoking habit, drinking habit and fatness (weight*0.9/height-100) as independent variables, revealed that PbB, age, drinking habit and fatness in order were significantly contributed to the dependent variable. 6. Stepwise multiple regression analysis using diastolic pressure as dependent variable and PbB, ZPP, ALAU, age, work duration, smoking habit, drinking habit and fatness (weight*0.9/height-100) as independent variables, revealed that ALAU, age and fatness in order were significantly contributed to the dependent variable. 7. Stepwise multiple regression analysis using pressure difference as dependent variable and PbB, ZPP, ALAU, age, work duration, smoking habit, drinking habit and fatness(weight*0.9/height-100) as independent variables, revealed that PbB, age and fatness in order were significantly contributed to the dependent variable. 8. Logistic analysis of hypertensive conditions with categorized blood lead and other selected categorized independent variables indicated that only age(40> and 40≤) and fatness(1.0> and 1.0≤) were significantly contributed to dependent variable with 95% significant odd ratio confidence interval. With above results, lead exposure in terms of blood lead seemed to be minimally contributed to the raise of blood pressure, and the effect of blood lead was found to be more prominent on the pressure difference than the systolic and diastolic pressure themselves.

포항산 천연 제올라이트와 합성 제올라이트에 의한 금속 이온의 제거

박상윤,장세복,김덕수,김양 濟州大學校 基礎科學硏究所 1996 基礎科學硏究 Vol.9 No.2

국내 경상북도 포항시 남구에서 채취한 4종의 천연 제올라이트를 화학성분 분석, X-선 회절, 열시차분석 실험, 열중량분석 실험으로 분석하였다. 이들 제올라이트의 주성분은 석영, mordenite, heulandite가 함유된 clinoptilolite이었다. NaOH, Ca(OH)₂, HCI 용액으로 처리한 천연 제올라이트의 성질은 X-선 회절법과 열시차분석 실험법으로 연구하였다. 천연 제올라이트와 화학적으로 처리한 제올라이트, 합성 제올라이트를 이용하여 Cu²+, Cd²+, Hg²+, Pb²+, Cr6+등의 중금속 이온과 알칼리 금속 K- 이온의 제거능력을 비교하였고, 중금속 이온 용액의 pH값과 초기농도, 중금속 이온을 제거하는데 소요되는 반응 시간의 효과 등을 비교하였다. 천연 제올라이트에 Ca²+, Pb²+, and Cu²+ 이온용액을 각각 5ppm첨가한 결과 제거율이 94%, 95%, 97%까지 증가되었다. 또한 0.5N NaOH와 0.5 N HCI 용액으로 처리한 매석산 천연 제올라이트를 이용하여 Hg²+ 이온용액을 5ppm 첨가한 결과 제거율이 약 80% 정도였다. 매석산 천연 제올라이트와 합성 제올라이트 A,X 및 Y가 Hg²+ 이온의 최대 제거율을 나타내었다. The four natural zeolites collected in Pohang, Kyungsang buk-do, Korea, were analyzed by means of wet chemical methods, X-ray diffraction, DTA, and TGA. The results indicate that the primary species of those zeolites are clinoptilolite mixed with quartz, mordenite, and heulandite. These zeolites were treated with NaOH, Ca(OH)₂, and HCI solution and their differences were also studied by X-ray diffraction method and differential thermal analysis method. The capabilities of removing heavy metal ions, such as Cu²+, Cd²+, Hg²+, Pb²+ and Cr6+, and alkaline ion, K+ ions with original zeolites, chemically treated zeolites, and synthetic zeolites were compared. The effect of pH value of solution and initial concentration of heavy metal ions, and the effect of reaction time in removing heavy metal ions were ions were studied. The experimental results showed that up to 94%, 95%, and 97% of Ca²+, Pb²+, and Cu²+ ions could be removed, respectively, out of 5 ppm of untreated natural zeolites. About 80% of the Hg²+ ions could be also removed out of 5 ppm Hg²+ ions solution with Maesuk mt. natural zeolite which was treated with 0.5N NaOH and 0.5 N HCI solution. It was found that Maesuk mt. natrual zeolite was most efficient in removing Hg²+ ions compared with the other natural zeolites studied in this work and synthetic zeolite A, X and Y.

更年期障碍의 韓醫學的 考察

楊成祐,張峻福 경희대학교 2001 慶熙醫學 Vol.17 No.1

Ocular MALT Lymphoma : Report of Two Cases

윤영묵,장효찬,김동석,김상원,박미옥,박재복 대구효성가톨릭대학교 1998 연구논문집 Vol.57 No.2

Lymphoma arising in mucosa-associated lymphoid tissue(MALT) is extranodal marginal zone lymphoma displaying a proliferation of follicle marginal zone-type cells(centrocyte-like cells or monocytoid B-cells), often with surrounding reactive germinal centers and lympoepithelial lesions. This typically expresses pan-B-cell markers and monotypic immunoglobulin but not CD5 or CD10. Ocular MALT consists of the lacrimal gland, lcular soft tissue, orbit, conjunctiva and cornea. Lymphoma arising in thses sites is of very rare occurrence in up to 1.5% of all patients with non-Hodgkin's lymphoma. Herein we report two cases of ocular MALT lymphoma which was very rare in the dermatologic field. Case 1, 73-year-old man, developed the right upper conjunctival swelling measuring about 2.0×2.5cm for about 1 year. Histologically, the excised lesion showed follicular centers and infiltration of centrocyte-like cells of B-cell lineage in the stroma but no lymphoepithelial lesions, consistent with low-grade B-cell lymphoma. Case 2, a 66-year-old female, had a rapid course of about 1.2×1.0cm-sized, soft, wellow mass arising from lacrimal gland of the right upper eyelid for about 1 month. Hostologically, the lesion showed diffuse patterend features admixed with centrocyte-like cells and large cells such as centroblast, compatible with high-grade lymphoma. Case 2 received combined chemotherapy of m-BACOD, with a somewhat improvement.

개에서 이중 결찰법을 통한 동맥관 개존증의 완치 예

윤헌영,정순욱,박희명,박철,정만복,김준영,한현정,황민,노병국,박상혁,장하영,박정윤 한국임상수의학회 2004 한국임상수의학회지 Vol.21 No.1

A ten months old, female Yorkshire terrier weighing 2.88 kg referred to veterinary teaching hospital of college of veterinary medicine, Konkuk University because of syncope, cough and dyspnea. First hematological and serum chemical test revealed thrombocytopenia, mild anemia, and increase of concentration of ALP (195 U/L). On 57 days later, second hematological and serum chemical test revealed polycythemia, increase of concentration of ALP (211 U/L), and Tchol (387 mg/dl). Right atrium enlargement, main pulmonary artery bulge and cardiomegaly (VHS = 11.5) were observed in radiographic findings. Ultrasonographic images showed both right and left ventricular dilation and turbulent flow between the descending aorta and the main pulmonary artery in color Doppler imaging. ECG showed left ventricular enlargement, SA block, and electrical alternant. Thoracotomy was performed through left fourth intercostal incision under isoflurane anesthesia. Patent ductus arteriosus was double ligated with 1-0 silk. Cough and dyspnea disappeared on 5 days after operation. Turbulent flow was not found in color doppler imaging of ultrasonography on 10 days after operation. Ten months later after the operation, syncope could not exist any more.

Cold Saline Induced Injury of Endothelial Cell of Vein Segments in Rats

Jang Sang Park,Byung Kook Jang,Yong Bok Koh 대한외과학회 1997 대한외과학회 학술대회 초록집 Vol.1997 No.5