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开孔率
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  open porosity
    In this research, two new method were firstly put forward to fabricate PLA/β -TCP and PLA/ β -TCP/Collagen scaffolds with high open porosity by supercritical carbon dioxide (SC-CO_2).
    本研究首次提出了用超临界二氧化碳(SC-CO_2)技术制备高开孔率的聚乳酸(PLA)和β磷酸三钙(β-TCP)复合多孔支架材料的两种新方案:一是SC-CO_2反复循环萃取法;
短句来源
    The innovation point of this article is firstly adopting the two methods of SC-CO_2 RCI and SC-CO_2 fibre bonding with collagen fiber network to prepare higer open porosity scaffolds.
    全文的创新点在于首次采用了新型SC-CO_2反复循环萃取法和在此基础上以胶原纤维为网络制备更高开孔率的复合支架材料。
短句来源
    (2) The open porosity of the PLA/β-TCP/Collagen scaffolds fabricated by SC-CO_2 fibre bonding can achieve 82.81% which is 25% higher than the PLA/β-TCP scaffolds;
    (2) SC-CO_2纤维粘接法制备的PLA/β-TCP/Collagen支架材料的开孔率可达82.81%,比没加胶原的PLA/β-TCP支架高出近25%; 孔径在200-500μm之间,孔洞之间出现重要的“隧道”结构;
短句来源
    Fabrication and Characterization of the Tissue Engineering Scaffolds with High Open Porosity by Supercritical Carbon Dioxide
    超临界CO_2制备高开孔率的组织工程支架材料及性能表征
短句来源
    Both of the schemes are expected to ulteriorly solve the problem that the scaffold has too low open porosity by the SC-CO_2 traditional introduction one time (TIOT).
    两种思路都是为了进一步解决传统SC-CO_2一次性升压法制备的支架材料开孔率(即孔洞连通率)不高的问题。
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  “开孔率”译为未确定词的双语例句
    Results: 1, the strengthen of biomechanics, porosity and aperture of the developed gradient scaffold material met expected demands;
    结果:1、SC-CO_2反复循环法制备的PLA/壳聚糖/胶原的梯度支架材料的具有明显的梯度结构,支架材料的开孔率可以比传统的一次性升压法明显提高,其孔隙结构与孔隙率适宜软骨细胞的种植; 梯度材料的生物力学强度、孔隙率、孔径达到了软骨细胞体外生长和体内原位再生的要求;
短句来源
    The density and porosity of samples were determined by "liquid draining" method.
    运用排液法测试试样的密度及孔隙率(开孔率);
短句来源
    The porosity and the ratio of open pores in the product were analyzed in light of its density and by sodium chloride approaches, with the pore size, surface and internal structures examined under scanning electron microscope (SEM). Results The PLGA scaffolds made by this method had porosity of 90% and 92.5% respectively, their pore size ranging from 200 to 250 jun with the ratio of open pores exceeding 98% (f<0.01).
    结果利用此种方法制作的PLGA支架,空隙率达到90.0%和92.5%、孔径在200-250μm之间、开孔率为98.0%以上(P<0.01),平均氯化钠沥净时间为12~13h。 结论使用低热高压法制作的组织工程支架,三维结构稳定,各项参数可控制;
短句来源
  相似匹配句对
    The density and porosity of samples were determined by "liquid draining" method.
    运用排液法测试试样的密度及孔隙率(孔率);
短句来源
    porosity,46.4% ;
    气孔率46.4%;
短句来源
    Both of the schemes are expected to ulteriorly solve the problem that the scaffold has too low open porosity by the SC-CO_2 traditional introduction one time (TIOT).
    两种思路都是为了进一步解决传统SC-CO_2一次性升压法制备的支架材料孔率(即孔洞连通率)不高的问题。
短句来源
    A METHOD TO ESTIMATE THE OPEN-LOOP GAIN OF ARTERIAL BARORECEPTOR REFLEX IN NORMAL HUMAN SUBJECT
    正常人动脉压力感受器反射环增益的计算方法
短句来源
    The results indicated:the ratio of porosity was about 1.21%,and the thickness of reaction layer was less than 50 μm.
    结果表明:钛铸件的气孔率为1.21%;
短句来源
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  open porosity
Total open porosity and the most probable pore radius are determined by mercury porosity technique.
      
Ceramic materials with an open porosity of 37-42% are prepared.
      
After long-term irradiation, the elevated oxygen content in the metal and the formation of relatively bulky beryllium oxide film is due to the development of open porosity.
      
The effect of the respective pore characteristics, such as the volume fraction of open porosity and pore size distribution, on the microstructure of HAP/nylon hybrid composites is discussed.
      
Open porosity increased water uptake significantly only when no starch was added to the medium.
      
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Objective To develop a poly(lactide-co-glycolide)(PLGA) copolymer scaffold with good three-dimensional mi-crostructure and free of organic solvent, which can be used in bone repairing for tissue engineering, and to explore a novel method for developing polymeric scaffolds. Methods The polymer and sodium chloride were ground to powder and mixed in 2 different proportions as the materials for preparing the scaffolds by mild heating under high pressure. The porosity and the ratio of open pores in the product were...

Objective To develop a poly(lactide-co-glycolide)(PLGA) copolymer scaffold with good three-dimensional mi-crostructure and free of organic solvent, which can be used in bone repairing for tissue engineering, and to explore a novel method for developing polymeric scaffolds. Methods The polymer and sodium chloride were ground to powder and mixed in 2 different proportions as the materials for preparing the scaffolds by mild heating under high pressure. The porosity and the ratio of open pores in the product were analyzed in light of its density and by sodium chloride approaches, with the pore size, surface and internal structures examined under scanning electron microscope (SEM). Results The PLGA scaffolds made by this method had porosity of 90% and 92.5% respectively, their pore size ranging from 200 to 250 jun with the ratio of open pores exceeding 98% (f<0.01). The average sodium chloride leaching time was 12 to 13 h. Conclusions The scaffolds made in this way possess stable three-dimensional microstructure with controllable parameters and without cytotoxic effects caused by organic solvent.

目的制作不含有机溶剂、三维结构良好的聚丙交酯-乙交酯共聚物(PLGA)支架,使之符合组织工程骨修复的需要,探讨一种新型聚合物支架制作方法。方法将聚合物与氯化钠粉碎后,采用低热高压法制作PLGA泡沫结构支架,经密度法、氯化钠法测定其空隙率、开孔率;扫描电镜观察表面和内部结构、测定孔径。结果利用此种方法制作的PLGA支架,空隙率达到90.0%和92.5%、孔径在200-250μm之间、开孔率为98.0%以上(P<0.01),平均氯化钠沥净时间为12~13h。结论使用低热高压法制作的组织工程支架,三维结构稳定,各项参数可控制;根据模具的大小可以制作不同体积的支架;依据盐的颗粒粒度与数量控制支架的孔径和空隙率,在制作过程中不使用有机溶剂,减少了有机溶剂残留可能引起的对细胞的毒性。使用这种方法要对聚合物与氯化钠颗粒进行充分混合。

In this research,a new method of repeatedly cycling extraction comparing with traditional introduction one time was adopted to prepare poly lactic acid(PLA)/ tri-calcium phosphate(TCP) composite scaffold in which the pores were expected to be more interconnected.The open porosity,the shapes of different proportion of PLA/TCP and the mechanical capability had been investigated.The results showed below:the scaffolds made by this new method have 10% higher open porosity than those made by old one,and the diameter...

In this research,a new method of repeatedly cycling extraction comparing with traditional introduction one time was adopted to prepare poly lactic acid(PLA)/ tri-calcium phosphate(TCP) composite scaffold in which the pores were expected to be more interconnected.The open porosity,the shapes of different proportion of PLA/TCP and the mechanical capability had been investigated.The results showed below:the scaffolds made by this new method have 10% higher open porosity than those made by old one,and the diameter of the pores is between 200~300μm;there are several types of micro interspace in the pores and they are good for osteoblast's growing;TCP is perfectly distributed in the scaffold;the compressure modulua and compressure strength are 71.8 and 7.1MPa respectively,which are obviously increased comparing with pure PLA scaffolds.

相对于传统的超临界CO2(SC-CO2)一次性升压法,采用SC-CO2反复循环萃取法制备了聚乳酸(PLA)/磷酸三钙(TCP)复合多孔支架材料,以提高材料的孔洞连通率。本文研究了材料的开孔率,不同PLA和TCP配比材料的孔洞形态以及材料的力学性能。结果表明,反复循环萃取法制备的材料比传统的一次性升压法制备的材料的开孔率可以提高10%左右,孔径在200~300μm之间,孔壁上有丝网型等几种适合细胞种植的特殊微隙形态;TCP在PLA支架中的分散性很好;材料压缩模量和压缩强度分别可达71.8和7.1MPa,比单纯的PLA材料明显增加。

 
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