Phase Transformation Introduced by Mechanical and Chemical Surface Preparations of Tetragonal Zirconia Polycrystals

Cutting of Y₂O₃-doped TZP rods by a low-speed diamond saw introduces an unidentified, metastable phase X (x -ZrO₂) coexisting with the tetragonal ( t -ZrO₂) and the monoclinic ( m -ZrO₂) phases initially present in the sample. Further mechanical deformation of the cut surface by indentation or polishing sustains the x -ZrO₂. Chemical etching removes the x -ZrO₂ and increases the m -ZrO₂content.     

Glutamine dipeptide attenuate mucosal atrophic changes and preservation of gut barrier function following 5-FU intervention

Traditional parenteral nutrition (PN) and chemotherapy may lead to changes mucosal morphology and gut barrier function. To investigate the effects of alanyl-glutamine on intestinal mucosal morphology and gut barrier function in PN-fed rats challenged with 5-FU male Wistar rats were central catheterized and randomily divided into two groups: PN group (n = 10) that received traditional parenteral nutrition solution only, and Ala-Gln group (n = 10) that received glutamine dipeptide enriched nutritional solution (3% Ala-Gln). The rats were maintained on their respective diets for 7 days. 5-FU (75 mg/kg) was injected intraperitoneally at 8 am on day 4. All rats were gavaged with lactulose (100 mg) and mannitol (50 mg) in 2ml before and three days after administration of 5-FU. Ala-Gln group maintained serum glutamine concentration, intestinal mucosal morphology. While bacterial translocation rates in ala-Gln group was 30%, in PN group was 90% (P < 0.05). Similar intestinal permeability was observed on day 3 in both groups. The control group had a significantly increased intestinal permeability on day 7 (P < 0.05), while Ala-Gln group maintained the intestinal permeability. It was suggested that alanyl-glutamine maintained intestinal morphology and gut barrier function in PN-fed rats challenged with 5-FU.     

ZrO2陶瓷膜结构研究

以氧氯化锆为起始原料，通过溶胶－凝胶技术制备了无支撑体ＺｒＯ２陶瓷膜，ＤＴＡ－ＴＧ、ＸＲＤ、ＢＥＴ、ＳＥ等分析测试手段对陶瓷膜结构及其孔性能进行了表征，结果表明，ＺｒＯ２陶瘊膜具有高度的择优取向特征，膜烧结过程存在关ＺｒＯ２昌相转变，ＺｒＯ２陶瓷膜孔径〈５０ｎｍ，且呈双值分布，本言语亦基于实验分析对陶瓷膜的结构模型进行了初步探讨。     

添加微量锡对铜基摩擦材料性能的影响

研究了添加微量锡对铜基摩擦的摩擦性能的影响。结果表明，微量锡对摩擦系数无显著影响，但对磨损有显著影响，当锡含量为０．５０％时，摩擦材料及对偶材料的磨损都较小。     

重型血友病甲基因诊断新技术的研究及其应用

远用长距离ＤＮＡ扩增技术成功地检测出凝血八因子ＦⅧ基因倒位缺陷患者，并检出该倒位的女性携带者。     

双马来酰亚胺基体树脂的改性研究

本文报道用改性物B改善双马来酰亚胺/二胺预聚物溶解性的实验研究.结果表明,改性后的双马来酰亚胺/二胺基体树脂在低沸点、低毒性溶剂如丙酮中具有良好的溶解性,并且有足够的均相期,为湿法制作预浸料创造了有利条件.同时对树脂的固化反应、耐热稳定性及其复合材料在高温条件下(150℃、200℃)的层间剪切性能进行了研究.     

清水砼技术在民用建筑中的应用——浅谈建设项目如何应用新技术

本文通过介绍清水砼技术在民用建筑中的应用,对建设项目如何应用新技术进行探讨。     

在役生产装置安全评价存在的职业卫生问题

分析了在役生产装置安全评价存在的职业卫生问题,提出了如何做好重点生产装置职业病预防工作的建议。     

基于MSP430F413 MCU的IC卡煤气表的设计与实现

提出了以TI公司MSP430系列MCU为基础的IC卡煤气表的设计思想，给出了总体设计，硬件电路设计，软件流程设计及主要模块的编程框架，讨论了低功耗问题。同时，对IC卡煤气表设计中一些应注意的问题也进行了简要的阐述。     

构建本科院校质量保障体系

近年来，新建本科院校取得了快速发展。本文结合工作实际，就新建本科院校如何尽快完成角色转变，建立健全自身的人才培养质量保障体系进行了分析和研究。