绝热毛细管流量数值计算

根据两相流动的均相流假设 ,建立了绝热毛细管分布参数的稳态数学模型 ,结合制冷工质HFC 134a基于MH状态方程的热力学性质计算模型 ,采用新的基团贡献法计算粘度 ,用熵增判据考虑壅塞流动的影响 ,对绝热毛细管流量进行数值模拟计算。对理论计算结果与相关文献的实验数据进行了比较。针对以HFC 134a为工质的制冷系统 ,编制了一套较为实用的绝热毛细管流量计算软件     

节流性能优异的新型液体静压支承节流器

传统的液体静压支承节流器存在严重缺陷，性能不佳，不能消除支承间隙随外加载荷增加而剧减的缺点，严重影响其实际应用。新型节流器节流变量指数b≥3，能够保持节流器进油与油囊排油速度接近一致。此外，当有外加载荷作用于支承时，油囊压力会升高，迫使节流变量产生附加增量，从而弥补了因油囊压力升高而减少供油量与油囊增加的排油量。因此，新型节流器能够保证在有外加载荷作用时支承间隙变化很小或近于不变。新型节流器节流性能优良，结构简单，成本低廉，体积较小，具有实用价值。     

毛细管区带电泳的紫外可见光吸收检测

利用紫外可见光吸收方法完成毛细管区带电泳的检测工作，本文就实验装置，实验结果进行了讨论。     

生物芯片的原理和制作方法

生物芯片是用微加工技术（光刻、光化学合成、激光立体化学刻蚀等）并结合分子生物学技术制成的具有一定分子生物学分析检测功能的微型器件。它可用于完成生物样品的分离、制备、生化反应及产物的检测等一系列过程。本文综述了生物芯片概念的形成，生物芯片的特点、功能和分类，以及毛细管电泳型和探针列型两类生物芯片的几种制作方法。     

Capillary Micro-Flow Through a Fiber Bundle（Ⅰ）

The present work considered the capillary micro-flow through a fiber bundle. The resin heights in the fiber btundle as a function of time were used to detemine the experimental valises of capillary pressure and the permeability by the nonlinear regression,fitting method. The fitting curves showed a good agreement with experiments. However, these values of capillary pressure from short-time experiments were much lower than the theoretical results from the Yang-Laplace Equation. More accurate capillary presswre was predicted from the presented long-run experiment.     

CO_2跨临界循环中绝热毛细管数值模拟计算与分析

前期通过搭建试验台,分析了二氧化碳跨临界循环中毛细管的节流特性,并运用无量纲分析法计算出了毛细管质量流量无量纲试验关联式,经可靠性分析发现该关联式优于diogo的关联式。若超出考虑的范围时,该关联式模型可能产生较大的误差。由此,利用微元分割法,设计VB程序对毛细管长度和流量进行数值计算,将计算结果与前期试验测试结果和文献值做比较。在流量计算方面:95%的计算值与前期试验值的偏差在10%以内,与文献试验值的偏差全部在10%以内。在长度计算方面,90%的计算值与前期试验值的偏差在15%以内,75%的长度计算值与文献试验值的偏差在15%以内;在偏差分布方面:流量计算值与前期试验值和文献试验值,均有95%以上的流量计算值与试验值的偏差在10%以内。最后利用该计算程序,在标准工况下对毛细管尺寸进行数值计算,绘制成毛细管选型图。     

Accelerated Discovery of Potent Bioactive anti-TNFα Aptamers by Microbead-Assisted Capillary Electrophoresis (MACE)-SELEX

Dysregulation of tumor necrosis factor-α (TNFα), a pro-inflammatory cytokine, causes several diseases, making it an important therapeutic target. Here, we identified a novel DNA aptamer against human TNFα using in vitro selection, which included a high exclusion pressure process against non-binding and weak binders through microbead-assisted capillary electrophoresis (MACE) in only three rounds. Among the 15 most enriched aptamers, Apt14 exhibited the highest inhibitory activity for the interaction between TNFα and its cognate receptor in mouse L929 cells. For further improving the bioactivity of the aptamer, dimerization programed by hybridization was evaluated, resulting in the Apt14 dimer exhibited a twofold higher binding affinity and stronger inhibition compared to the monomer counterpart. Rapid identification of bioactive aptamers using MACE in combination with facile dimerization by hybridization accelerates the discovery of novel bioactive aptamers, paving the way toward replacing current monoclonal antibody therapy with the less expensive and non-immunogenic aptamer therapy.     

Morphology,mechanical, and rheological behavior of microcellular injection molded EVA–clay nanocomposites

Ethylene vinyl acetate (EVA)/montmorillonite (MMT) nanocomposites diluted from master batch (50 wt.%) with EVA and EVAgMA was used in this study. The organoclay EVA nanocomposites were then injection molded by conventional and microcellular methods. Nitrogen was used as the blowing agent. The effect of organoclay content and MA grafted EVA on the morphology and the mechanical and rheological properties of the EVA–clay nanocomposites were then investigated. The results showed that the mechanical properties (tensile and impact) increased as the clay content increased. Cell size decreased as the clay loading increased. The EVAgMA nanocomposites had better mechanical properties than the EVA nanocomposites. XRD results showed that the EVAgMA nanocomposites have an exfoliated layered structure while the EVA nanocomposites are intercalated. Rheological results showed the viscosity is clay loading dependent and that the shear thinning effect occurs at high shear rates.     

大浪淀水库中有机氯农药的监测

采用毛细管柱气相色谱法测定了大浪淀水库的有机氯农药。该法能使各组分完全分离,具有较高的精密度和准确度,适用于地表水中有机氯农药残留的分析。