The results show: external diffusion is control process for mass transfer, and increasing air velocity and decreasing particle diameter are effective measures to decrease mass transfer resistance.
研究结果表明：外扩散过程是传质的控制步骤，增大风速、减小吸附剂颗粒直径是减少传质阻力的有效措施。
The results show: external diffusion is the main resistance for mass transfer, and increasing air velocity and decreasing particle diameter are effective measures to decrease mass transfer resistance.
研究结果表明，外扩散过程是传质的主要阻力，增大风速、减小吸附剂颗粒直径是减少传质阻力的有效措施。
Results showed that the smaller the diameter of aerosol particle was, the bigger the Brownian diffusion deposition was.
结果表明，气溶胶粒子的粒径越小，布朗扩散越显著；
Because of its much larger external surface area and much smaller pore diameter than granular carriers, it is expected to benefit diffusion-controlled fast surface reactions.
因为纤维催化剂比粒状催化剂的外表面积大得多，而直径却小得多，因而予计对扩散控制的快速表面反应是有利的。
The effect of pore characteristics on gas diffusion was analyzed. The relationships between the specific area, average pore diameter and porosity with the diffusion coefficient were obtained.
分析了比表面积、平均孔径、孔隙率等孔隙特性参数对扩散的影响，获得了分形多孔介质中气体扩散系数与平均孔径的函数关系。
OBJECTIVE to study antibacterial activity in vitro and bone-affinity of tetracycline analogues to observe their correlation. METHODS Inhibitory zone diameter was measured by disc AGAR diffusion (DAD).
目的检测四环素类似物的体外抗菌活性，以观察类似物的抗菌和趋骨活性的相关性。
OBJECTIVE to study antibacterial activity in vitro and bone-affinity of tetracycline analogues to observe their correlation. METHODS Inhibitory zone diameter was measured by disc AGAR diffusion (DAD).
目的检测四环素类似物的体外抗菌活性，以观察类似物的抗菌和趋骨活性的相关性。
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