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不同消毒方法对口腔印模尺寸稳定性的影响 被引量:2
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作者 周甜 解保生 吴云鼎 《海南医学》 CAS 2017年第13期2167-2170,共4页
在临床口腔修复过程中,制取口腔印模是必不可少的步骤,口腔印模尺寸稳定性直接影响修复体的制作精度,从而影响口腔修复的质量。在临床制取口腔印模后,印模表面会残留大量患者体液,出于医院感染防控需求,要求对印模进行消毒处理。但消毒... 在临床口腔修复过程中,制取口腔印模是必不可少的步骤,口腔印模尺寸稳定性直接影响修复体的制作精度,从而影响口腔修复的质量。在临床制取口腔印模后,印模表面会残留大量患者体液,出于医院感染防控需求,要求对印模进行消毒处理。但消毒本身会可能带来理化变化,从而影响口腔印模的尺寸稳定性。影响印模尺寸稳定性的因素较多,其中以消毒影响较大。本文就现有的印模消毒方法对印模尺寸稳定性的影响作一综述。 展开更多
关键词 消毒方法 尺寸稳定度 口腔印模 消毒剂
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Effects of co-precipitation temperature on structure and properties of La and Y doped cerium zirconium mixed oxides 被引量:2
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作者 Lian-jie ZHANG Mei-sheng CUI +5 位作者 Hao WANG Yong-ke HOU Shi-lei CHEN Zhi-zhe ZHAI Zhi-qi LONG Yong-qi ZHANG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2022年第2期618-628,共11页
Due to the oxygen storage and release properties,cerium zirconium mixed oxides are recognized as the key material in automotive three-way catalysts.To reveal the effects of co-precipitation temperature on structure,ph... Due to the oxygen storage and release properties,cerium zirconium mixed oxides are recognized as the key material in automotive three-way catalysts.To reveal the effects of co-precipitation temperature on structure,physical and chemical properties of multi-doped cerium zirconium mixed oxides,a series of La and Y doped cerium zirconium mixed oxides(CZLYs)were synthesized via a co-precipitation method,and the physical and chemical properties of CZLYs were systemically characterized by XRD,N_(2) adsorption−desorption,TEM,XPS,oxygen storage capacity(OSC)and hydrogen temperature programmed reduction(H_(2)-TPR).The results show that co-precipitation temperature is an important parameter to influence the crystal size,oxygen storage capacity and thermal stability of CZLYs.When the co-precipitation temperature was 60℃,the best redox properties and thermal stability of CZLYs were obtained.After thermal treatment at 1100℃for 10 h,the specific surface area and oxygen storage capacity of the corresponding aged sample were 15.42 m^(2)/g and 497.7μmol/g,respectively.In addition,a mechanism was proposed to reveal the effects of co-precipitation temperature on the structure and properties of CZLYs. 展开更多
关键词 La and Y doping cerium zirconium mixed oxides co-precipitation temperature crystal size thermal stability
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Coalescence Behaviors of Drop Swarms on Liquid-Liquid Interface 被引量:4
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作者 唐洪涛 陈建平 崔世海 《Transactions of Tianjin University》 EI CAS 2011年第2期96-102,共7页
The trajectory model of dispersed phase drops and distribution model of drop diameters were derived.By numerical simulation,the analytical results indicate that a large number of dispersed phase drops accumulate on th... The trajectory model of dispersed phase drops and distribution model of drop diameters were derived.By numerical simulation,the analytical results indicate that a large number of dispersed phase drops accumulate on the upper plate in different directions and form a hydrodynamic area with the stream-wise location in the range of 0—0.4m,where the flow of trickling film obtains kinetic drive from flowing field.The flowing field of trickling film exhibits an unstable state if the stream-wise location is less than 0.02m,and a stable state otherwise.Moreover,different velocity vectors of drops in the x-y plane result in different interactions between the trickling film and drops.For the non-uniform distribution of drop diameters,there is a stronger interaction between the trickling film and drop if the stream-wise location is less than 0.02m,because the amplitudes of velocity vectors are higher than those in the range of 0.02—1.0m.The result reveals a complexity and diversity of stratified two-phase flowing field.On the other hand,both the basic flowing field and distributions of drop diameters have a great influence on the distributions of comparable kinetic energy of drops.The complicated motions of larger drops are helpful to coalescence because they will consume much more kinetic energy on the trickling film than those of smaller drops.The change of comparable kinetic energy of smaller drops is continuous and steady.The smaller drops are easily entrained by the liquid-liquid flowing field. 展开更多
关键词 TRAJECTORY COALESCENCE DROP DIAMETER distribution
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