硒对微波辐照致PC12细胞损伤的保护作用

目的探讨硒对微波致神经细胞损伤的保护作用.方法以离体培养的PC12细胞为研究对象,采用65 mW/cm2的微波照射20 min进行致伤,以细胞存活率、MDA含量、SOD和GSH-Px活性为实验指标反映Na2SeO3预处理对微波辐照致PC12细胞损伤的影响.结果微波辐照后PC12细胞存活率明显降低,MDA含量增加,SOD、GSH-Px活性降低,而经过Na2SeO3预处理后再接受微波辐照,以上指标的变化明显减轻,并且高剂量Na2SeO3预处理作用更明显.结论硒可以提高PC12细胞的抗氧化能力,保护神经细胞对抗微波辐射导致的细胞损伤.     

同一消解液同时测定中成药中砷汞铅铜含量的研究

以新癀片为对象采用同一的微波、酸消解法，用还原气化冷原子荧光法测汞；用氢化发生-电感耦合等离子体原子发射光谱法测砷；用石墨炉原子吸收法测铅和铜。并用加际消化和国家标准物质的测定，证明方法准确可靠。     

烧结温度对牙科氧化锆陶瓷部分物理机械性能的影响

目的研究烧结温度对氧化锆陶瓷的机械性能及可加工性能的影响。方法纳米级氧化锆(ZrO2)粉体,由3mol%氧化钇(Y2O3)稳定,经干压成型,于800℃～1300℃之间,间隔50℃烧结,测试不同烧结温度瓷块的密度、硬度和断裂韧性并测算可加工性能。结果800℃～1300℃温度范围内,随着烧结温度的提高,氧化锆陶瓷的密度、硬度和断裂韧性均呈现逐步上升趋势。在所设定的温度范围内,纳米3mol%,Y2O3-ZrO2粉体在1200℃基本完成烧结(>99%理论密度),当烧结温度为900℃时瓷块的可加工指数达到最高,显著优于其它各温度段(P<0.05)。结论纳米氧化锆粉体能在较低的烧结温度达到完全致密;通过对3mol%Y2O3-ZrO2粉体烧结温度的控制可以调节氧化锆瓷块的机械性能和可加工性,降低加工成本满足牙科CAD/CAM加工所需材料的要求。     

微波法治疗妇产科腹部切口脂肪液化80例的疗效观察

摘要:目的:探讨微波法治疗妇产科腹部手术切口脂肪液化的疗效.方法:对我院近期做的妇产科手术后发生切口脂肪液化时所进行的治疗进行对比,分为微波治疗组和传统治疗组.以治疗时间、伤口愈合时间和总有效率评价其疗效.结果:微波治疗组的平均治疗时间和平均切口恢复时间均短于对照组(P＜0.05);微波治疗组治疗总有效率(96.25％...     

插入式微波天线阵列诱导高温原位灭活治疗肢体恶性或侵袭性骨肿瘤

目的：评价插入式微波天线阵列诱导高温原位灭活治疗肢体恶性或侵袭性骨肿瘤保肢诉临床应用。方法：应用插入式微波天线阵列诱导高温原位灭活治疗肢体恶性或侵袭性骨肿瘤１９０例,从手术技术、肿瘤学、关节功能并发症等方面全面综合评价此方法的临床应用效果。结果：恶性骨肿瘤１３４例,术后平均随访４７ｍｏ,因远隔脏器转移死亡者３２例,另有３例虽有肺部转移,但经转移病灶切除后现仍无瘤存活;存活率为７４．２％;１０２例存     

微波等离子体引发合成P(AMPS/NIPA)新型智能凝胶及其性能

以2-丙烯酰胺-2-甲基丙磺@（AMPS）和异丙基丙烯酰胺（NIPA）为单体，通过微波等离子体引发聚合制备了新型二元智能凝胶P（AMPS／NIPA），并对其性能进行了研究。探讨了等离子体功率及处理时间对聚合反应的影响；研究了该凝胶的温度敏感性、吸水／失水动力学和pH敏感性及其影响因素；对凝胶的组成及三维交联网络结构进行了表征。结果表明，P（AMPS／NIPA）二元智能凝胶具有高的溶胀比、很好的温度敏感性和pH敏感性以及快的智能响应速率。     

微波联合化疗对白血病耐药细胞株K562/MDR的作用

目的 :研究微波联合化疗药物对白血病耐药细胞株K5 6 2 MDR的抑制作用。方法 :用四唑蓝快速比色法 (MTT法 )检测细胞存活率。结果 :吡柔比星 (THP)经 2 0min 43℃水浴加热处理 ,对K5 6 2 MDR的抑制作用明显提高 (P <0 .0 5 ) ,再联合微波对吡柔比星抑制作用的提高不明显。长春新碱 (VCR)经 2 0min 43℃水浴加热处理 ,对K5 6 2 MDR的抑制作用提高不明显 ,但联合微波后 ,长春新碱的抑制作用明显提高 (P <0 .0 5 )。结论 :微波与高温能增加K5 6 2 MDR细胞对化疗药物的敏感性。     

微波对体外培养的骨髓基质细胞脂质过氧化损伤

目的 :观察微波对体外培养的骨髓基质细胞的脂质过氧化损伤作用 .方法 :体外培养骨髓基质细胞 ,微波按强度分为 3组 (10 ,2 0和 30mW·cm-2 ) .辐照 1h ,共进行 2次试验 ,每次每组 4瓶细胞 .辐照后立即测定SOD活性 ,MDA含量 ,检测细胞存活率 .用方差分析进行统计分析 .结果 :微波辐照后 ,2 0mW·cm-2 组和 30mW·cm-2 组SOD活性下降(P <0 .0 1) ,MDA含量升高 (P <0 .0 1) ,细胞存活率明显下降 .结论 :在本实验条件下 ,微波可引起体外培养的骨髓基质细胞的脂质过氧化损伤     

微波水热法制备核壳结构勃姆石粉体

目的 制备核壳结构勃姆石粉体.方法 以两亲嵌段共聚物为添加剂的微波水热法.结果 本研究制备了核壳结构勃姆石粉体,并利用透射电子显微镜（TEM）、扫描电子显微镜（SEM）、X-射线衍射技术（XRD）、傅里叶变换红外吸收光谱（FTIR）对其形貌和晶型进行了表征.结论 与传统水热制备方法相比,微波水热法具有反应时间短、能耗低、产物粒径小且形貌均匀等明显的优势.     

Novel factor-loaded polyphosphazene matrices: Potential for driving angiogenesis

Currently employed bone tissue engineered scaffolds often lack the potential for vascularization, which may be enhanced through the incorporation of and regulated release of angiogenic factors. For this reason, the objective here was to fabricate and characterize protein-loaded amino acid ester polyphosphazene (Pphos)-based scaffolds and evaluate the novel sintering method used for protein incorporation, a method which will ultimately allow for the incorporation of proangiogenic agents. To test the hypothesis, Pphos and their composite microspheres with nanocrystalline hydroxyapatite (Pphos-HAp) were fabricated via the emulsion solvent evaporation method. Next, bovine serum albumin (BSA)-containing microsphere matrices were created using a novel solvent–non-solvent approach for protein loading. The resulting protein (BSA) loaded circular porous microsphere based scaffolds were characterized for morphology, porosity, protein structure, protein distribution and subsequent protein release pattern. Scanning electron microscopy revealed porous microsphere scaffolds with a smooth surface and sufficient level of sintering, illustrated by fusion of adjacent microspheres. The porosity measured for the poly(ethyl phenylalanato:glycinato)phosphazene (PNPhGly) and poly(ethyl phenylalanato:glycinato)phosphazene-hydroxyapatite (PNPhGly-HAp) scaffolds were 23 ± 0.11% and 18 ± 4.02%, respectively, and within the range of trabecular bone. Circular dichroism confirmed an intact secondary protein structure for BSA following the solvent sintering method used for loading and confocal microscopy verified that FITC-BSA was successfully entrapped both between adjacent microspheres and within the surface of the microspheres while sintering. For both Pphos and their composite microsphere scaffolds, BSA was released at a steady rate over a 21 day time period, following a zero order release profile. HAp particles in the composite scaffolds served to improve the release profile pattern, underscoring the potential of HAp for growth factor delivery. Moreover, the results of this work suggest that the solvent–non-solvent technique for protein loading is an optimal one that will allow for future development of angiogenic factor-loaded Pphos matrices with the capacity to invoke neovascularization.