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차체 구조용 에폭시 접착제의 접합부 특성에 미치는 Zirconate 첨가효과
정은택,이혜림,이소정,임창용,서종덕,김목순,김준기,Jeung, Eun-Taek,Lee, Hye-Rim,Lee, So-Jeong,Lim, Chang-Young,Seo, Jong-Dock,Kim, Mok-Soon,Kim, Jun-Ki 대한용접접합학회 2013 대한용접·접합학회지 Vol.31 No.5
The effect of zirconate having - NH functional group on the T-peel and lap shear strength of $CaCO_3$ containing structural epoxy adhesive for car body assembly was investigated. Curing behavior of epoxy adhesive samples were investigated by differential scanning calorimeter (DSC) techniques. The addition of zirconate up to 7.5 phr did not affect the curing mechanism of epoxy adhesive. While the small amount of zirconate addition less than 1.1 phr increased the cross-linking density, the excess addition of zirconate resulted in the increase of uncross-linked impurity. From the increase of T-peel and lap shear strength and the change of fracture mode from the adhesive failure to the mixed one, it was considered that the small addition of zirconate was effective in improving the adhesion strength of epoxy adhesive to the adherend and inorganic filler surfaces. The formation of uncross-linked impurity with the excess addition of zirconate was considered to decrease the joint strength by decreasing the cohesive strength of the cured epoxy.
정은택(Eun Taek Jeong),박춘순(Chun Sun Park) 한국복식학회 2000 服飾 Vol.50 No.6
Classifying the diverse and complex clothing category of nationality subcultures in China is not a simple task. However, summing up, it can be largely classified that clothing of the northern area is long trousers and short skirt, Among the clothing of Nationality in China, especially, Pao(robe: 袍) has its diversity and colorfulness, whose elements forming its each characteristic feature has enough value to be investigated fully in the historical point of view. The conclusions of this study reveals that Pao in nationality subculture in China can possibly be divided into the four types as Qipao(旗袍) in Dongpei area, Mongopao(蒙古袍) in Inner Mongolia, Qiapan(겹번) in Xinjiang area, and Zangpao(藏袍) in Tibet area. The modes of Qipao and Mongopao are mainly similar in that they have Diagonally on the right, stand collar in composition, but Qipao shows its diversity in collar and slashes, and Mongopao also shows diversity in its collar and waistband. Since western culture flowed into China along with its open door and reform policy, the splendid color and distinctive pattern, decoration, diversified method of compositions and clothing categories of Nationality cultures are disappearing in its their originality and nationality.
박정현,김학렬,양세훈,정은택 圓光大學校 醫科學硏究所 2002 圓光醫科學 Vol.17 No.1
폐포단백증은 폐포를 침범하는 비염증성 질환으로 국내에서 계속 발견될 것으로 예상된다. 따라서 호흡곤란 이외에는 특별한 증상과 증후가 없는 환자의 단순흉부방사선촬영 소견에서 비특이적인 폐침윤 소견이 관찰된다면 폐포단백증을 반드시 감별진단 하는 것이 필요하다고 판단된다. 저자들은 건강검진을 위해 시행한 단순흉부방사선촬영에서 양측 하부 폐야에 미만성 음영 증가가 있었던 무증상의 40세 여자환자에서 고해상도 전산화 단층촬영, 폐포세척액검사, 흉강경하폐생검을 시행하여 폐포단백증을 확진 한 후 임상증상과 병의 진행이 거의 없어 전폐세척술을 시행하지 않고 주기적인 단순흉부방사선촬영을 하며 현재 외래에서 추적 관찰 중인 폐포단백증 1예를 경험하여 문헌고찰과 함께 보고하는 바이다. Pulmonary Alveolar proteinosis (PAP) is an uncommon diffuse lung disease of unknown etiology that is characterized by the accumulation of large amounts of a phospholipoproteinaceous material in the alveoli. It has a variable clinical presentation and course. Most cases are primary but some cases are secondary to other conditions or inhalation of chemicals. Its pathogenesis is believed to involve abnormalities of surfactant homeostasis and recently, animal experiments suggest that this may be related, in some instances at least, to defects in GM-CSF signalling. Although the causative treatment of PAP is not well known, whole lung lavage still remains the safest and the most effective treatment with overall good prognosis. Because of possibility of increasing incidence, non-inflammatory alveolar disease with unknown etiology must be differentiated from PAP. We presented one case of asymptomatic PAP, which was found incidentally through chest X-ray and confirmed by light and electron microscopic examination of lung tissues obtained by open lung biopsy & bronchoalveolar lung lavage.
폐암에서 유래한 피부 전이암 7예의 임상 및 병리조직학적 관찰
차승훈,정상원,이상원,박석돈,전재훈,정은택 대한피부과학회 1999 대한피부과학회지 Vol.37 No.11
Background:Cancer that tends to metastasize to other internal organs also involves the skin with various clinical features. Objective:We studied the clinical and histopathological findings of metastatic skin cancer and primary lung cancer. Methods:We reviewed the clinical features and histopathological findings in 7 patients with metastatic skin cancer from the lung cancer. We performed routine hematoxylin-eosin stain and immunohistochemical staining with monoclonal antibody to cytokeratin, neuron specific enolase, S-100, leukocyte common antigen, and epithelial membrane antigen using the formalin-fixed paraffin embedded skin tissue of cutaneous metastatic and primary lung cancer. Results:All patients are men ranging from 44 to 72 years in age(mean, 63.0 years). Cutaneous lesions were nodule, tumor, and sclerotic plaque. Skin lesions appeared on all parts of body. The neck, chest, and scalp were the most common locations of metastases. Pathologic findings were squamous cell carcinoma in 5 patients, adenosquamous cell carcinoma in 2 patients. We found some different immunophenotypes in cutaneous metastatic lesion and lung cancer. Mean survival time from the diagnosis of lung cancer was 10.4 months, and 8.4 months from the diagnosis of skin metastasis. Conclusion:We conclude that patients with cutaneous metastasis of lung cancer reflect progressive, terminal stage, and poor prognosis of the disease.