共查询到19条相似文献,搜索用时 104 毫秒
1.
2.
3.
4.
5.
目的:了解聚砜膜生物反应器实验系统对重肝患者血浆的影响,探索聚砜膜中空纤维反应器作为生物人工肝反应器的可行性。方法:用磁力搅动法将分离的新生实验小型猪肝细胞进行球形体培养,接种到聚砜膜中空纤维反应器外腔,观察聚砜膜生物反应器实验系统对重肝患者血浆的血氨、胆红素、凝血酶原时间、TNF-α、TGF-β1的影响。结果:该实验系统能降低重肝患者血浆的血氨、胆红素,缩短凝血酶原时间,降低TNF-α、TGF-β1水平。结论:聚砜膜生物反应器实验系统能够清除重肝患者血浆中的小分子有毒物质,补充有益成分,降低细胞因子水平。 相似文献
6.
文章通过生产实际考察及各种厌氧反应器特征分析,设计了一种新型厌氧反应器。该新型厌氧反应器外循环旋流式水力搅拌装置有效解决了厌氧反应器普遍存在的泥水混合不均匀问题;反应器上部横向错排式半软性弹性填料层实现了污泥的高效截留,反应器顶盖上加装的喷头定期进水冲洗则可解决填料层堵塞问题。自配淀粉水溶液作为水样,采用ASBR模式进行常温启动。结果表明,该新型厌氧反应器在较短的时间内即可形成颗粒污泥,并且运行稳定。 相似文献
7.
8.
9.
10.
11.
由于组织培养室对温度和湿度的控制要求越来越高,设计组织培养室温度和湿度的控制系统来满足当今组织培养的需要。本文设计了控制系统,通过实验验证,满足组织培养室的基本要求,达到了温度和湿度的实时监控和控制的效果。 相似文献
12.
13.
14.
着重对圆波导旋转铰链的主要尺寸(圆波导半径R、圆波导腔体长度L、模式变换块厚度和高度以及圆波导铰链输入口径)进行了理论设计和分析,给出了工程经验设计公式,并借助于微波电磁场仿真软件HFSS,对Ku、X波段两种圆波导旋转铰链进行了仿真设计,理论上拓宽了圆波导旋转铰链的工作带宽。结果和目前该两种圆波导旋转铰链产品实测性能比较吻合。 相似文献
15.
We demonstrate a mass production amenable technology for the fabrication of polymer fibers that can be used as 3D scaffolds for cell culture and tissue engineering. As the first attempt, we used centrifugal melt spinning technique to fabricate fiber matrix of poly-lactic-co-glycolic acid (PLGA) which is a well-known biodegradable co-polymer. We then developed a solvent assisted centrifugal spinning technique to produce fiber matrix of polystyrene (PS) which has a relative high glass transition temperature comparing to that of PLGA. Both melt spinning and solvent assisted spinning techniques were studied with two types of commercial cotton-candy machines. Finally, the fabricated fibers were used as scaffolds for cell culture, showing application potentials for large volume cell proliferation. 相似文献
16.
By research on the switch-signal theory for multiple-valued logic circuits, the theory of three essential elements and the principle of adiabatic circuits, a design scheme for a double power clock ternary clocked transmission gate adiabatic logic (DTCTGAL) circuit is presented. The energy injection and recovery can be conducted by the bootstrapped NMOSFET, which makes the circuit maintain the characteristics of energy recovery as well as multiple-valued input and output. An XOR/XNOR circuit based on DTCTGAL is also presented using this design scheme. Finally, using the parameters of a TSMC 0.25 μm CMOS device, PSPICE simulation results indicate that the proposed circuits have correct logic and significant low power characteristics. 相似文献
17.
By research on the switch-signal theory for multiple-valued logic circuits, the theory of three essential elements and the principle of adiabatic circuits, a design scheme for a double power clock ternary clocked transmission gate adiabatic logic (DTCTGAL) circuit is presented. The energy injection and recovery can be conducted by the bootstrapped NMOSFET, which makes the circuit maintain the characteristics of energy recovery as well as multiple-valued input and output. An XOR/XNOR circuit based on DTCTGAL is also presented using this design scheme. Finally, using the parameters of a TSMC 0.25μm CMOS device, PSPICE simulation results indicate that the proposed circuits have correct logic and significant low power characteristics. 相似文献
18.
隐失波荧光显微镜及其在植物细胞生物学中的应用 总被引:1,自引:0,他引:1
隐失波荧光显微术(evanescent wave fluorescence microscopy,EWFM)是一种对细胞膜附近的生物学过程进行选择性观测的光学显微成像技术,该技术是基于全内反射原理,即当光在生物样品表面产生全内反射时,虽然在样品表面未被光直接照亮,但它仍会产生一种隐失波,这种隐失波却有足够能量将样品表面100~200 nm范围内的荧光基团激发。由于这一特性使得隐失波荧光显微镜能对靠近细胞膜的生物学过程,如胞吞胞吐、单个分子与细胞膜的结合和解离,以及膜上受体的动态变化过程等进行更好的观测。本文简略地介绍了隐失波荧光显微术的原理,同时对其在细胞生物学,特别是在植物细胞生物学中的应用作了初步总结。随着隐失波荧光显微镜的商业化及其观测技术的不断改进,它将在生命科学领域的研究中发挥越来越大的作用。 相似文献