Nano - matreials have a perfect perspective for their volume effects and surface effects , which could enhance biologic activity , adhesiveness and proliferation of cells 纳米材料因具有一些独特的效应,如体积效应和表面效应,有利于细胞黏附、增殖和功能表达,因而作为生物医用材料特别是组织工程支架材料具有良好的应用前景。
In this article , four basic properties of nanometer particle are summarized : quantum size effect , surface effect , volume effect , macroscopical quantum tunnel effect , and several ways of preparation and evaluation of nanometer particle are introduced 摘要综述了纳米微粒的四个基本特性:量子尺寸效应、表面效应、体积效应及宏观量子隧道效应,并介绍了纳米微粒的制备方法及对纳米微粒评估的方法。
But , because of the partial volume effect of the organism , directly processing of the gene microarray data will make that the characters extracted are not those of the biology genes , which will reduce the measurement sensitivity of the gene features 但是,机体组织所具有的部分体积效应,使得对基因微阵列数据的直接处理将造成所提取特征不是真正的生物基因特征本身,严重降低基因特征测量的灵敏度和指向性。
The results show that the composites were more wear resistant than the matrix , contributing to the " volume effect " and " size effect " , the wear resistance increases with the particle content and size . the composite shows better wear resistance than high chromium cast iron material especially in low load and fine abrasive test condition . the results also indicate that the composite strengthened by ageing treatment was more wear resistant than as - cast composite 磨损试验结果表明,铸造碳化钨颗粒增强cu - ni - mn合金基复合材料具有比较高的抗磨料磨损能力,而且其耐磨性随着铸造碳化钨颗粒体积分数及尺寸的增大而提高,表现出了强烈的“体积效应”及“尺寸效应” ,尤其是在低载荷、细磨料磨损条件下,复合材料表现出更好的而寸磨性,即使与高铬铸铁( cr28 )相比也有很大程度的提高。
Moreover , the density of nano - hexa - ferrites was reduced , so they are very easily to be applied . the purpose of this paper is to synthesize nano - hexa - ferrites . comparision with normal materials , nano - materials have special performance because of their special surface effect , volume effect , and quantum effect 纳米粒子由于具有特殊的表面效应、体积效应、量子隧道效应,表现出与常规材料不同的物理化学性质,对纳米吸波材料而言,其具有极好的吸波特性,同时具备吸波频带宽、兼容性好、质量轻和厚度薄等特点。