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Effect of particle size on coal char----NO reaction
Xiumin JIANG, Xiangyong HUANG, Jiaxun LIU, Chaoqun ZHANG
《能源前沿(英文)》 2011年 第5卷 第2期 页码 221-228 doi: 10.1007/s11708-011-0146-x
关键词: NO reduction chemisorption particle size X-ray photoelectron spectroscopy density functional theory (DFT)
《环境科学与工程前沿(英文)》 2022年 第16卷 第10期 doi: 10.1007/s11783-022-1557-0
● A series of Cu-ZSM-5 catalysts were tested for DMF selective catalytic oxidation.
关键词: N N-Dimethylformamide Selective catalytic oxidation Cu-ZSM-5 CuO particle size
Hakan T TURKER
《结构与土木工程前沿(英文)》 2022年 第16卷 第8期 页码 1017-1028 doi: 10.1007/s11709-022-0871-8
关键词: testing apparatus & methods plain concrete tensile properties biaxial flexural strength triangular plate method
《化学科学与工程前沿(英文)》 2023年 第17卷 第12期 页码 1986-2000 doi: 10.1007/s11705-023-2337-5
关键词: sp3/sp2-hybridized C–N bond noble metal nanoparticle catalytic active site turnover frequency DFT
Shuman Xu, Xiaoxiao Zhang, Dangguo Cheng, Fengqiu Chen, Xiaohong Ren
《化学科学与工程前沿(英文)》 2018年 第12卷 第4期 页码 780-789 doi: 10.1007/s11705-018-1733-8
关键词: hierarchical ZSM-5 crystal size catalytic cracking Thiele modulus effectiveness factor
Liu Jin-Xun,Wang Peng,Xu Wayne,Hensen Emiel J. M.
《工程(英文)》 2017年 第3卷 第4期 页码 467-476 doi: 10.1016/J.ENG.2017.04.012
费托合成(FTS)是近年来越发重要的能源转化途径,它可将一氧化碳和氢气的合成气转化为液态燃料和化学品,合成气的原料来自煤炭、天然气或生物质。在费托合成反应中,分散的过渡金属纳米粒子作为催化剂,用于催化以碳- 碳键生成为基础的反应。催化剂的催化活性和选择性与纳米粒子的电子结构和几何结构密切相关,具体取决于纳米粒子的尺寸、形态和晶相。在本文中,我们将回顾近期关于费托合成反应催化剂的体相和表面敏感性方面的工作。通过深入理解以上参数对不同催化剂行为的影响,有助于指导设计开发出更高活性、稳定性以及更优选择性的催化剂。
关键词: 费托合成 Fe、Co、Ru 碳化物 尺寸效应 晶相结构
《环境科学与工程前沿(英文)》 2021年 第15卷 第3期 doi: 10.1007/s11783-020-1356-4
•Bacterial concentrations from eight stages were 104–105copies/m3.
关键词: Size distribution Airborne bacteria Biological diversity Human pathogenic bacteria Composting plants
Amir ALLAHBAKHSHI,Masih ALLAHBAKHSHI
《机械工程前沿(英文)》 2015年 第10卷 第2期 页码 187-197 doi: 10.1007/s11465-015-0339-9
In this paper, for the first time, the modified strain gradient theory is used as a new size-dependent Kirchhoff micro-plate model to study the effect of interlayer van der Waals (vdW) force for the vibration analysis of multilayered graphene sheets (MLGSs). The model contains three material length scale parameters, which may effectively capture the size effect. The model can also degenerate into the modified couple stress plate model or the classical plate model, if two or all of the material length scale parameters are taken to be zero. After obtaining the governing equations based on modified strain gradient theory via principle of minimum potential energy, as only infinitesimal vibration is considered, the net pressure due to the vdW interaction is assumed to be linearly proportional to the deflection between two layers. To solve the governing equation subjected to the boundary conditions, the Fourier series is assumed for w=w(x, y). To show the accuracy of the formulations, present results in specific cases are compared with available results in literature and a good agreement can be seen. The results indicate that the present model can predict prominent natural frequency with the reduction of structural size, especially when the plate thickness is on the same order of the material length scale parameter.
关键词: graphene van der Waals (vdW) force modi- fied strain gradient elasticity theory size effect parameter
黄殿武,乔玲,汪时机
《中国工程科学》 2007年 第9卷 第4期 页码 50-54
采用弹性理论研究了圆柱形胶体在表面张力作用下的弹性失稳问题;利用能量泛函变分的方法导出 了发生弹性失稳的非经典边界条件,得到了失稳的判据方程。分析判据方程发现,弹性失稳与圆柱体的半径、 内禀尺度和失稳波长相关。
Particle size distribution and shape control of Au nanoparticles used for particle gun
S. Kida, M. Ichiji, J. Watanabe, I. Hirasawa
《化学科学与工程前沿(英文)》 2013年 第7卷 第1期 页码 60-64 doi: 10.1007/s11705-013-1313-x
关键词: reduction crystallization particle size distribution gene transferring media
A better way to do small-for-size liver transplantation in rats
null
《医学前沿(英文)》 2011年 第5卷 第1期 页码 106-110 doi: 10.1007/s11684-011-0113-2
Establishing a model for small-for-size liver transplantation is the basis for this study of partial and living donor graft liver transplantation. This study aims to explore a simpler and more effective way of establishing a 30% small-for-size liver transplantation in rats. Sprague-Dawley rats were selected as the donors and recipients. Small-for-size orthotopic liver transplantation was performed using Kamada’s two-cuff method. The donor’s liver was flushed via the abdominal aorta and hepatectomy was performed in situ. The animals were divided into three groups depending on the graft selected, with 40 pairs of rats in each group. In group I, the median lobe of the liver was used as graft; in group II, the right half of the median lobe and the right lobe were used as graft; and in group III, the median and right lobes were used as graft. In groups I and II, the bodyweights of donors were the same as those of recipients; however, in group III the bodyweights of donors were 100–120 g less than those of the recipients. The duration needed for transplantation, the 7-day survival rates, and the technical complication rates were compared among these three groups. The time required for hepatectomy was shorter in group III compared with groups I and II (8.8?±?0.7 min vs. 11.5?±?1.1 min and 10.1?±?1.0 min, P = 0.001). The cold ischemia time for the grafts, the anhepatic times, and the transplantation times for the recipients were not significantly different among the three groups. Compared with groups I and II, the incidence of bleeding, bile leakage, and inferior vena caval strictures were significantly decreased in group III (P<0.05). No significant differences between the three groups were found based on other complications after the operation (P>0.05). Group III had better 7-day survival rates and longer median survival times but the differences were not statistically significant. The method of small for donor bodyweight using the median and right lobes for grafting may be a more effective and simpler way of establishing a 30% small-for-size liver transplantation in rats, as shown by the shorter hepatectomy time and the occurrence of fewer complications after the operation.
《结构与土木工程前沿(英文)》 页码 1163-1187 doi: 10.1007/s11709-023-0987-5
关键词: cast-in anchor concrete cone capacity geopolymer concrete head size surface crack anchor profile
Pengxu YAO,Yaquan WANG,Teng ZHANG,Shuhai WANG,Xiaoxue WU
《化学科学与工程前沿(英文)》 2014年 第8卷 第2期 页码 149-155 doi: 10.1007/s11705-014-1409-y
关键词: extra framework Ti cyclohexanone ammoximation titanium silicalite-1 sodium ion crystal size
Determination of mechanical parameters for elements in meso-mechanical models of concrete
Xianglin GU, Junyu JIA, Zhuolin WANG, Li HONG, Feng LIN
《结构与土木工程前沿(英文)》 2013年 第7卷 第4期 页码 391-401 doi: 10.1007/s11709-013-0225-7
关键词: concrete meso-mechanical model discrete element method size effect mechanical parameter
标题 作者 时间 类型 操作
Effect of particle size on coal char----NO reaction
Xiumin JIANG, Xiangyong HUANG, Jiaxun LIU, Chaoqun ZHANG
期刊论文
Effect of Cu-ZSM-5 catalysts with different CuO particle size on selective catalytic oxidation of N,N-Dimethylformamide
期刊论文
Effect of size on biaxial flexural strength for cement-based materials by using a triangular plate method
Hakan T TURKER
期刊论文
Effect of noble metal nanoparticle size on C–N bond cleavage performance in hydrodenitrogenation: a study
期刊论文
Effect of hierarchical ZSM-5 zeolite crystal size on diffusion and catalytic performance of n-heptane
Shuman Xu, Xiaoxiao Zhang, Dangguo Cheng, Fengqiu Chen, Xiaohong Ren
期刊论文
The size distribution of airborne bacteria and human pathogenic bacteria in a commercial composting plant
期刊论文
Vibration analysis of nano-structure multilayered graphene sheets using modified strain gradient theory
Amir ALLAHBAKHSHI,Masih ALLAHBAKHSHI
期刊论文
Particle size distribution and shape control of Au nanoparticles used for particle gun
S. Kida, M. Ichiji, J. Watanabe, I. Hirasawa
期刊论文
Influence of surface cracking, anchor head profile, and anchor head size on cast-in headed anchors in
期刊论文
Effect of sodium ions in synthesis of titanium silicalite-1 on its catalytic performance for cyclohexanone
Pengxu YAO,Yaquan WANG,Teng ZHANG,Shuhai WANG,Xiaoxue WU
期刊论文