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Thermal properties of pressureless melt infiltrated AlN-Si-Al composites

Transactions of Nonferrous Metals Society of China 2013年第5期23卷 1304-1313页

作者： Ayse KALEMTAS Gulsum TOPATES Ozlembahadir Pinar KAYAISCI Hasan MANDAL Department of Metallurgical and Materials Engineering Mugla Sitki Kocman University Department of Materials Science and Engineering Anadolu University Material Science and Engineering Programme Sabanci University

Thermal properties of AlN-Si-Al composites produced by pressureless melt infiltration of Al/Al alloys into porous a-Si3N4 preforms were investigated in a temperature range of 50-300 °C. SEM and TEM investigations revealed that the grain size of AlN particles was less than 1 μm. In spite of sub-micron grain size, composites showed relatively high thermal conductivity （TC）, 55-107 W/（m·K）. The thermal expansion coefficient （CTE） of the composite produced with commercial Al source, which has the highest TC of 107 W/（m·K）, was 6.5×10-6 K-1. Despite the high CTE of Al （23.6×10-6 K-1）, composites revealed significantly low CTE through the formation of Si and AlN phases during the infiltration process.

关键词： AlN ceramic-matrix composites thermal properties liquid metal infiltration

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Protective effects of erythropoietin against acute lung injury in a rat model of acute necrotizing pancreatitis

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World Journal of Gastroenterology 2007年第46期13卷 6172-6182页

作者： Oge Tascilar Güldeniz Karadeniz Cakmak Ishak Ozel Tekin Ali Ugur Emre Bulent Hamdi Ucan Burak bahadir Serefden Acikgoz Oktay Irkorucu Kemal Karakaya Hakan Balbaloglu Gürkan Kertis Handan Ankarali Mustafa Comert Department of Surgery Zonguldak Karaelmas UniversitySchool of MedicineKozlu-Zonguldak 67600Turkey Department of Immunology Zonguldak Karaelmas UniversitySchool of MedicineKozlu-Zonguldak 67600Turkey Department of Pathology Zonguldak Karaelmas UniversityThe School of MedicineKozlu-Zonguldak 67600Turkey Department of Biochemistry Zonguldak Karaelmas UniversitySchool of MedicineKozlu-Zonguldak 67600Turkey Department of Biostatistics Zonguldak Karaelmas UniversitySchool of MedicineKozlu-Zonguldak 67600Turkey

AIM： TO investigate the effect of exogenous erythro- poietin （EPO） administration on acute lung injury （ALI） in an experimental model of sodium taurodeoxycholate- induced acute necrotizing pancreatitis （ANP）. METHODS： Forty-seven male Wistar albino rats were randomly divided into 7 groups： sham group （n = 5）, 3 ANP groups （n = 7 each） and 3 EPO groups （n = 7 each）. ANP was induced by retrograde infusion of 5% sodium taurodeoxycholate into the common bile duct. Rats in EPO groups received 1000 U/kg intramuscular EPO immediately after induction of ANP. Rats in ANP groups were given 1 mL normal saline instead. All animals were sacrificed at postoperative 24 h, 48 h and 72 h. Serum arnilase, IL-2, IL-6 and lung tissue malondialdehyde （MDA） were measured. Pleural effusion volume and lung/body weight （LW/BW） ratios were calculated. Tissue levels of TNF-a, IL-2 and IL-6 were screened immunohistochemically. Additionally, ox-LDL accumulation was assessed with immune-fluorescent staining. Histopathological alterations in the lungs were also ***： The mean pleural effusion volume, calculated LW/BW ratio, serum IL-6 and lung tissue MDA levels were significantly lower in EPO groups than in ANP groups. No statistically significant difference was observed in either serum or tissue values of IL-2 among the groups. The level of tumor necrosis factor-（~ （TNF-（~） and IL-6 and accumulation of ox-LDL were evident in the lung tissues of ANP groups when compared to EPO groups, particularly at 72 h. Histopathological evaluation confirmed the improvement in lung injury parameters a^er exogenous EPO administration, particularly at 48 h and 72 h. CONCLUSION： EPO administration leads to a significant decrease in ALI parameters by inhibiting polymorphonuclear leukocyte （PMNL） accumulation, decreasing the levels of proinflammatory cytokines in circulation, preserving microvascular endothelial cell integrity and reducing oxidative stress-associated lipid peroxidation and therefore, can

关键词： Erythropoietin Acute pancreatitis Acute lunginjury Acute respiratory distress syndrome Cytokine

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绿白相间

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建筑实践 2015年第4期 18-25页

作者：杨一石 Konya Metropolitan Municipality bahadir Kul Architects Saridag lar Company

土耳其Konya的城市体育馆,看起来很像一个巨大的足球。这栋由BKA(bahadir Kul Architects)所设计的纪念碑式建筑拥有绿白相间的外表,不仅仅呼应了会在其中进行的体育运动之一——足球,还迎合了Konya城市足球俱乐部的代表色。体育馆坐落... 详细信息

土耳其Konya的城市体育馆,看起来很像一个巨大的足球。这栋由BKA(bahadir Kul Architects)所设计的纪念碑式建筑拥有绿白相间的外表,不仅仅呼应了会在其中进行的体育运动之一——足球,还迎合了Konya城市足球俱乐部的代表色。体育馆坐落在Konya的北面,离市中心9千米,占地45万平方米。其中包括了一个足球场,一个游泳池,一个赛车场和一个广场。市政府希望通过兴建体育设施和场馆来提升这个地区的经济,于是

关键词：运动员光电系统足球场辐射加热器体育馆钢结构排水管道代表色

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