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Predicative value of urinary protein biomarkers on delayed renal involvement in children with Henoch-Sch?nlein purpura

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Science China(Life Sciences) 2019年第12期62卷 1594-1596页

作者： Haipeng liu Wei Cui hongjuan liu Chenyu Zhang Clinical Laboratory Center Anhui Provincial Childrens HospitalHefei 230051China Medical Laboratory Center Anhui Institute of Pediatric ResearchHefei 230051China Medical Laboratory Center Childrens Hospital of Anhui Medical UniversityHefei 230051China Department of Scientific Research Anhui Provincial Children's HospitalHefei 230051China

Dear Editor,Henoch-Schonlein purpura(HSP)is one of the most common vasculitides in children with the incidence of 10-30 cases per 100,000 per year(Chen and Mao,2015)and its prognosis primarily depends on the extent of renal ***,the onset of renal involvement may be delayed for weeks or months after the appearance of acute symptoms in HSP patients and easily be omitted(Mao et al.,2014).The increased urine protein biomarkers were remarkable indicators of early renal damage or early renal tubular function damage(Zulu et al.,2016)and had a great potential for early prognosis of HSP,but seldom do relationship between these biomarkers and later renal impairments of HSP were *** study aimed to investigate the relationship of several urinary protein levels during the acute stage of HSP,including N-acetyl-beta-D-glucosaminidase(NAG),p2-microglobulin(P2-MG),retinol-binding protein(RBP),transferrin(TRF),immunoglobulin G(IgG)and microalbumin(MA),with the risk of subsequent renal involvement after acute phase in HSP.

关键词： involvement urinary urine

Friction and wear properties of Cu-based self-lubricating composites in air and vacuum conditions

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Acta Metallurgica Sinica(English Letters) 2012年第5期25卷 391-400页

作者： Shiyin HUANG Yi FENG Kewang DING Gang QIAN hongjuan liu Yang WANG Department of Material Science and Engineering Hefei University of Technology Hefei 230009 China

Cu-based self-lubricating materials containing two different solid lubricants （graphite and MoSs） were fabricated by P/M hot pressing techniques. Physical and mechan- ical properties of the samples were examined. The effects of graphite and MoSs contents on friction coefficient and wear rate were investigated by a ring-on-disc wear machine in air and vacuum conditions, respectively. Tribo-films formed on the worn surfaces were characterized by scanning electron microscopy （SEM） and X-ray photo- electron spectroscopy （XPS）. The results indicated that density, hardness and bending strength all increased with the increasing content of MoS2, while the relative density was opposite. Sample B containing 15 vol. pct graphite and 15 vol. pct MoS2 pos- sessed superior tribological properties both in air and vacuum conditions. However, the tribo-films formed on the worn surfaces of the sample B were greatly discrepant in composition at different testing conditions. In air, the volume ratio of MoS2 and graphite in the tribo-films is 0.31：1 whereas the ratio in vacuum is 1.07：1.

关键词： Self-lubricating composite Air and vacuum conditions Frictioncoefficient Wear rate Synergistic effect

Effect of Electrical Current on the Tribological Behavior of the Cu-WS_2-G Composites in Air and Vacuum

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Chinese Journal of Mechanical Engineering 2013年第2期26卷 384-392页

作者： QIAN Gang FENG Yi LI Bin HUANG Shiyin liu hongjuan DING Kewang School of Materials Science and Engineering Hefei University of Technology

As the traditional graphite-based composites cannot meet the requirement of rapid developing modern industry, novel sliding electrical contact materials with high self-lubricating performance in multiple environments are eagerly required. Herein a copper-based composite with WS2 and graphite as solid lubricant are fabricated by powder metallurgy hot-pressed method. The friction and wear behaviors of the composites with and without current are investigated under the condition with sliding velocity of 10 m/s and normal load of 2.5N/cm 2 in both air and vacuum. Morphologies of the worn surfaces are observed by optical microscope and compositions of the lubricating films are analyzed by XPS. Surface profile curves and roughness of the worn surfaces are obtained by 2205 surface profiler. The results of wear tests show that the friction coefficient and wear volume loss of the composites with current are greater than that without current in both air and vacuum due to the adverse effects of electrical current which damaged the lubricating film partially and roughed the worn surfaces. XPS results demonstrate that the lubricating film formed in air is composed of oxides of Cu, WS2 , elemental S and graphite, while the lubricating film formed in vacuum is composed of Cu, WS2 and graphite. Because of the synergetic lubricating action of oxides of Cu, WS2 and graphite, the composites show low friction coefficient and wear volume loss in air condition. Owing to the fact that graphite loses its lubricity which makes WS2 become the only lubricant, severe adhesive and abrasive wear occur and result in a high value of wear rate in vacuum condition. The formation of the lubricating film on the contact interface between the brush and ring is one of the factors which can greatly affect the wear performance of the brushes. The low contact voltage drop of the composites in vacuum condition is attributed to the high content of Cu in the surface film. This study fabricated a kind of new sli

关键词： Cu-WS2-G composites electrical current air and vacuum environments friction and wear contact voltage drop

Maximum 2 × 3 Grid-Block Packings of Kv

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Journal of Mathematical Research with Applications 2014年第2期34卷 137-146页

作者： Lidong WANG hongjuan liu Institute of Mathematics Beijing Jiaotong University Department of Basic Courses Chinese People's Armed Police Force Academy Department of Computer Science and Engineering Langfang Polytechnic Institute

Let Kvbe the complete graph on v vertices, and G a finite simple undirected graph without isolated vertices. A G-packing of Kv, denoted by(v, G, 1)-packing, is a pair(X, A)where X is the vertex set of Kvand A is a family of edge-disjoint subgraphs isomorphic to G in Kv. In this paper, the maximum number of subgraphs in a(v, G, 1)-packing is determined when G is K2× K3, the Cartesian product of K2and K3, leaving two orders *** design originated from the use of DNA library screening.

关键词： packing complete graph Cartesian product.

Response of larch species to climate changes

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Journal of Plant Ecology 2008年第3期1卷 203-205页

作者： Wenfang Leng Hong S.He hongjuan liu Group of Landscape Ecology Institute of Applied EcologyChinese Academy of SciencesShenyang 110016China The Tourism Department Qinghuangdao Institute of TechnologyQinghuangdao 066100China Department of Forest School of Nature ResourcesUniversity of MissouriColumbiaMO 65211USA Group of Information Management of Agriculture and Ecosystem Center for Agriculture Resources ResearchInstitute of Genetics and Developmental BiologyChinese Academy of SciencesShijiazhuang 050021China

Global warming has changed the distributions of forests of northeastern *** are very important species in this *** the potential distributions of Larix species and their responses to climate change would attract more and more *** paper predicted the potential distributions of three Larix species based on‘climatic-topographic’relationships by logistic *** results showed that *** is predicted to retreat northwestward by 220 km by 2050 and by 270 km more by 2100;*** *** is predicted to retreat northwestward by 200 km by 2050 and by 190 to 300 km more by 2100;***-rupprechtii is predicted to retreat northeastward by 200 km by 2050 and by 250 to 400 km more by *** indicated that *** could have its optimum latitude moved into Russia,*** *** could move to the Small Xing’an Mountains and *** would move to the middle part of the Great Xing’an Mountains.

关键词： Larix gmelinii Larix olgensis var.changpaiensis Larix principis-rupprechtii logistic regression climate change Northeastern China

Tunable organic particles:An efficient approach from solvent-dependent Schiff base macrocycles

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Chinese Chemical Letters 2021年第11期32卷 3522-3525页

作者： Ying Xiong Chao Huang hongjuan liu Rui Yi Bi-Xue Zhu Xin-Long Ni Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province Guizhou UniversityCuiyang 550025China School of Chemistry and Materials Guizhou Normal UniversityGuiyang 550025China College of Chemistry and Chemical Engineering Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan ProvinceHunan Normal UniversityChangsha 410081China

The synthesis of cyclopolymers upon controlling the degree of macrocyclic polymerization,followed by the discovery of new properties has attracted increasing attention in supramolecular ***,a Schiff-base condensation method performed at room temperature was used to control the formation of[1+1]and[2+2]*** pure MeOH,the isomer[1+1]macrocycles were synthesized and organic particles such as dendritic,rods,and solid microspheres were directly precipitated from the reaction ***[1+1]macrocycles can be efficiently converted into their corresponding[2+2]macrocycles accompanied by the tunable morphology of the organic particles when n-hexane was added to the MeOH *** studies showed that these organic particles have potential application toward the selective removal of Cd^(2+)ions with different adsorption ability in MeOH solution.

关键词： Schiff base Organic particles Macrocycle Noncovalent interaction Self-assembly

Voltammetry and fluorescence studies on the interaction between Eu(phen)_3^(+3)and DNA

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Rare Metals 2003年第2期22卷 131-136页

作者： KANG Jingwan, CHEN Jing, LU Xiaoquan, SONG Yuming, ZENG hongjuan, liu Hongde, and WANG yongshengDepartment of Chemistry, Northwest Normal University, Lanzhou 730070, China (Received 2002-04-02) Department of Chemistry Northwest Normal University Lanzhou 730070

The binding mode of Eu(phen)_3^(3+) with DNA is studied by fluorescence andvoltammetric methods. From the Scatchard graph and the fluorescence quenching phenomenon, it isconcluded that the mode of interaction between Eu(phen)_3^(3+) and DNA is intercalation bind byinserting the phen pi-pi conjugate surface between the base pairs of the DNA duplex. Voltammetry wasused to confirm the results obtained from the fluorescence method, the result from both methodsagrees with each other. The binding constant (K) and the binding site size (n_s) were calculatedfrom voltammetric data such as the shifts in potential and limiting currents in the process ofadding DNA, according to the positive shifts of peak potential. It was considered that the complexof the +2 ion interacted more favorably with the nucleotide bases than that of the +3 ion byhydrophobic interaction.

关键词： electroanalysis chemistry voltammetry fluorescence Eu(phen)_3^(3+) DNA intercalation bind

Numerical Solution of Nonlinear Klein-Gordon Equation Using Lattice Boltzmann Method

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Applied Mathematics 2011年第12期2卷 1479-1485页

作者： Qiaojie Li Zong Ji Zhoushun Zheng hongjuan liu 不详

In this paper, in order to extend the lattice Boltzmann method to deal with more nonlinear equations, a one-dimensional (1D) lattice Boltzmann scheme with an amending function for the nonlinear Klein-Gordon equation is proposed. With the Taylor and Chapman-Enskog expansion, the nonlinear Klein-Gordon equation is recovered correctly from the lattice Boltzmann equation. The method is applied on some test examples, and the numerical results have been compared with the analytical solutions or the numerical solutions reported in previous studies. The L2, L∞ and Root-Mean-Square (RMS) errors in the solutions show the efficiency of the method computationally.

关键词： Lattice Boltzmann Chapman-Enskog Expansion Nonlinear Klein-Gordon Equation

经典的误读及其反思——以《儒林外史》严监生的阅读为中心

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中国文学研究 2017年第3期 11-15页

作者：刘红娟华南农业大学人文与法学学院广东广州510642

文学作品的阅读是民族文化传承的重要方式,也是经典作品生成的必经通道。然而,在经典生成的阅读进程中,许多基于文本片断教材式、欣赏式的选读,成就了文本经典,也产生了误读作品的诸多谬误的经典。《儒林外史》中严监生的形象长期被界... 详细信息

文学作品的阅读是民族文化传承的重要方式,也是经典作品生成的必经通道。然而,在经典生成的阅读进程中,许多基于文本片断教材式、欣赏式的选读,成就了文本经典,也产生了误读作品的诸多谬误的经典。《儒林外史》中严监生的形象长期被界定为吝啬鬼,如果通读、细读作品,会发现严监生在物质上从来都是宽于待人,严于律己,最多也是过于节俭而已。功名与伦理的劣势,是造成其可悲命运的主要原因。以严监生的形象再讨论为中心,旨在重新强调文本细读的全面、平实与通达的重要性,开启经典应有的日常魅力与人情内涵。

关键词：《儒林外史》严监生经典误读