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NUMERICAL SIMULATION OF NANOPARTICLE COAGULATION IN A POISEUILLE FLOW VIA A MOMENT METHOD

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Journal of Hydrodynamics 2008年第1期20卷 1-9页

作者： liu Song LIN jian-zhong State Key Laboratory of Fluid Power Transmission and Control Zhejiang University Hangzhou 310027 China China Jiiiang University Hangzhou 310018 China

Numerical simulations of coagulating nano-scale aerosols in a two dimensional Poiseuille flow between fixed plates are performed. Evolution of the particle field is obtained by utilizing a moment method to approximate the aerosol general dynamic equation. A moment method is used, which assumes a lognormal function for the particle size distribution and requires knowledge of the first three moments. A Damk？hler number is defined to represent the ratio of the convection time scale to the coagulation time scale. Simulations are performed based on three Reynolds numbers, 100, 500 and 1000, and on three initial particle volume fractions corresponding to Damk？hler numbers 0.1, 0.2 and 1.0. Spatio-temporal evolution of the first three moments along with the geometric mean volume and standard deviation are discussed.

关键词： nanoparticle Coagulation moment method Poiseuille flow

A New Angiosperm Genus from the Lower Cretaceous Yixian Formation, Western Liaoning, China

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Acta Geologica Sinica(English Edition) 2013年第4期87卷 916-925页

作者： HAN Gang FU Xiao-ping liu zhong-jian WANG Xin Palaeontological Center Bohai University Fairylake Botanical Garden Shenzhen Municipality and Chinese Academy of Sciences Shenzhen Key Laboratory for Orchid Conservation and Utilization the National Orchid Conservation Center of China and Orchid Conservation & Research Center of Shenzhen State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology

The abundant fossils of early angiosperms found in the Yixian Formation （125 Ma, Early Cretaceous） have demonstrated unexpectedly high diversity and various reproductive strategies, and thus have shed new light on early angiosperm evolution. Here, using light microscope and scanning electron microscope, we document several fructifications of Baicarpus gen. nov. from Liaoning province, China. Each fructification of the new taxon includes several apocarpous carpels/fruits attached in an urn-formed gynobase. Each fruit/carpel has a persistent straight style and an ovary enclosing a single seed. These fossil plants demonstrate a new floral organization and thus enhance our understanding of the diversity of angiosperms in the Yixian Formation. Together with previously reported ones, this fossil angiosperm suggests an origin time for angiosperms earlier than widely accepted.

关键词： paleobotany fruits Barremian-Aptian Yixian Formation Liaoning province

Highly sensitive chemiluminescence technology for protein detection using aptamer-based rolling circle amplification platform

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Journal of Pharmaceutical Analysis 2011年第3期1卷 159-165页

作者： Zhi-Juan Cao Qian-Wen Peng Xue Qiu Cai-Yun liu jian-zhong Lu School of Pharmacy Fudan University Shanghai 201203 China

A robust, selective and highly sensitive chemiluminescent （CL） platform for protein assay was presented in this paper. This novel CL approach utilized rolling circle amplification （RCA） as a signal enhancement technique and the 96-well plate as the immobilization and separation carrier. Typically, the antibody immobilized on the surface of 96-well plate was sandwiched with the protein target and the aptamer-primer sequence. This aptamer-primer sequence was then employed as the primer of RCA. Based on this design, a number of the biotinylated probes and streptavidin-horseradish peroxidase （SA-HRP） were captured on the plate, and the CL signal was amplified. In summary, our results demonstrated a robust biosensor with a detection limit of 10 fM that is easy to be established and utilized, and devoid of light source. Therefore, this new technique .will broaden the perspective for future development of DNA-based biosensors for the detection of other protein biomarkers related to clinical diseases, by taking advantages of high sensitivity and selectivity.

关键词： Protein Aptamer Chemiluminescence Rolling circleamplification

Form transition of sodium during combustion of black liquor coal slurry

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Journal of China University of Mining and Technology 2008年第1期18卷 6-12页

作者： LAN Ze-quan CAO Xin-yu ZHOU Jun-hu liu jian-zhong2, CHENG Jun CEN Ke-fa North China Institute of Science and Technology Yanjiao Hebei 065201 China State Key Laboratory of Clean Energy Utilization Zhejiang University Hangzhou Zhejiang 31.0027 China

Several typical ash samples from a 0.25 MW test furnace fired black liquor coal slurry were selected for investigation. The phases and compounds containing sodium in ash samples were acquired from X-ray diffraction analyses. As well, detailed analyses of the amounts of major mineral elements along thickness gradients of representative ash samples were carried out. The elements, including Na, Si, A1, S and C1 were analyzed by the advanced electron probe microanalyzer equipment, which provid evidence and interpretation for the analytical results of XRD. The findings indicate that the occurrence form of sodium has experi- enced important changes during the combustion of black liquor coal slurry, which translated into nepheline, thenardite, sodium sulfate, sodium chloride, sodium silicoaluminate, hanyne and other phases containing sodium, from NaOH, Na2CO3 and Na2S in raw fuel. Of all the sodium compounds, nepheline, thenardite and sodium sulfate are the most important forms of Na in solid com- bustion residues. Such a transformation of Na during the combustion of black liquor coal slurry resulted in a considerable impact on ash deposition and is not only different from the raw coal and papermaldng black liquors, but is also affected by local circum- stances in the combustion furnace. Amounts of Na, S and C1 in ash deposits from low temperature zones were larger than those from high temperature zones. Our findings should provide important theoretical instructions for industrial applications of black liquor coal slurry.

关键词： black liquor coal slurry sodium form transition ash deposition

线性模型误差方差阵的扰动对区间估计置信度及精度的影响

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工程数学学报 2001年第2期18卷 49-53页

作者：刘建忠宁夏农学院基础课部银川750105

讨论了线性模型中误差方差阵的扰动对区间估计置信度及精度的影响问题。

关键词：线性模型置信区间矩阵谱条件数误差方差阵置信度区间估计

新型纤维金属混合层板结构的疲劳裂纹扩展与分层行为

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航空材料学报 2012年第5期32卷 97-102页

作者：黄啸刘建中北京航空材料研究院北京100095

为了研究一种新型混合层板的损伤容限性能,针对两种铺层混合层板结构进行了应力比R=0.1,-1下两种锯切缺口尺寸试样的疲劳裂纹扩展试验,对比分析了获得的裂纹扩展a-N曲线数据,并通过对试样进行腐蚀去层,研究了层板的各层分层形态。结果表... 详细信息

为了研究一种新型混合层板的损伤容限性能,针对两种铺层混合层板结构进行了应力比R=0.1,-1下两种锯切缺口尺寸试样的疲劳裂纹扩展试验,对比分析了获得的裂纹扩展a-N曲线数据,并通过对试样进行腐蚀去层,研究了层板的各层分层形态。结果表明,在应力比R=0.1时该新型混合层板疲劳裂纹扩展性能明显优于铝合金板;预浸料两侧添加胶膜比不添加胶膜会导致较好的疲劳裂纹扩展性能;由于裂纹桥接机制作用,锯切缺口尺寸较短层板试样比较长层板试样有较好的裂纹扩展性能;层板中心层铝板较其它层铝板裂纹扩展明显滞后;内层铝板与预浸料间沿裂纹方向呈近似三角形分层。

关键词：新型混合层板疲劳裂纹扩展分层

论“依附型合作”——一种解读儒士与专制王权政治关系的新视角

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人文杂志 2010年第3期 55-61页

作者：刘中建山东财政学院政法学院

基于政治社会学的社会交换理论提出依附型合作的概念,认为儒士与专制王权之间存在依附型合作关系。儒家所特有的政治资源使得依附型合作具有可能性,而合作的真正实现有赖于儒士与王权的共同努力和相互认同,这种合作关系在汉代中期得以... 详细信息

基于政治社会学的社会交换理论提出依附型合作的概念,认为儒士与专制王权之间存在依附型合作关系。儒家所特有的政治资源使得依附型合作具有可能性,而合作的真正实现有赖于儒士与王权的共同努力和相互认同,这种合作关系在汉代中期得以实现。依附型合作不仅仅是对儒士政治地位的静态描述,更体现为儒士与王权之间的一种政治博弈的互动模式。儒士与王权之间的这种合作互动关系持续于整个古代中国,是王权政治得以长期存生的主要原因之一。

关键词：儒士专制王权依附型合作政治资源互动模式

Regulation of estrogen receptors α and β in human breast carcinoma by exogenous leptin in nude mouse xenograft model

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Chinese Medical Journal 2010年第3期000卷 337-343页

作者： YU Wei GU Jun-chao liu jian-zhong WANG Shao-hong WANG Yu ZHANG zhong-tao MA Xue-mei SONG Mao-min Department of General Surgery Beijing Friendship Hospital Capital Medical University Beijing 100050 China Department of General Surgery Beijing Tiantan Hospital Capital Medical University Beijing 100050 China

Background It is essential to clarify the interactions of hormones during the progression of human breast cancer. This study examined the effects of exogenous human leptin on estrogen receptor （ER） α and β in human breast tumor tissue in a nude mouse xenograft model. Methods We created nude mice xenografts of MCF-7 human breast cancer cells, and randomly divided them into an experimental group and a control group. The mice in experimental group were injected subcutaneously around tumors with human leptin, while the control group were injected with the same dose of normal saline. A real-time RT-PCR assay was developed to quantify the mRNA of ERα, β in the tumor tissues. Western blotting analyses were used to assess the relative quantities of the ERα , β proteins. Results Leptin-treated xenografted nude mice were successfully established. The amount of ERa mRNA was significantly higher in the leptin group than in the control group （P 〈0.01）, while the amount of ERβ mRNA was significantly lower in the leptin group than in the control group （P 〈0.01）. Western blotting analyses revealed that the ERa protein level was significantly higher in the leptin group than in the control group （P 〈0.01）, while the ERβ protein level was significantly lower in the leptin group than in the control group （P 〈0.01）. Conclusions Nude mouse xenograft model can be safely and serviceably treated with human leptin by subcutaneous injections around tumor. ERα, β were both targets of leptin in breast cancer. Leptin can up-regulate the expression of ERa and down-regulate the expression of the ERβ in human breast tumor.

关键词： human leptin xenografl model estrogen receptors α and β

TWO NEW NEOLIGNANS FROM MESSERSCHMIDIA SIBIRICA ***.

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Chinese Chemical Letters 1992年第12期3卷 975-976页

作者： Zhi zhong SONG Zi Min liu zhong jian JIA Qi Xiu ZHU Institute of Organic Chemistry,State Key Laboratory of Applied Organic Chemistry,Lanzhou University,Lanzhou-730000

From the aerial parts of Messerschmidia sibirica ***.,two new neolignans were isolated and elucidated as messerschmidin and its acetate.

关键词： TWO NEW NEOLIGNANS FROM MESSERSCHMIDIA SIBIRICA L.SSP ppm