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Dental caries and first permanent molar pit and fissure morphology in 7-to 8-year-old children in Wuhan,China

International Journal of Oral Science 2012年第3期4卷 157-160页

作者： Jin-Dong Wang Xi Chen Jo Frencken min-quan du Zhi Chen Key Laboratory for Oral Biomedicine of ministry of Education School and Hospital of StomatologyWuhan UniversityWuhanChina Shenzhen Maternal and Children's Hospital ShenzhenChina Department of Global Oral Health Radboud University Nijmegen Medical CentreCollege of Dental SciencesNijmegenThe Netherlands

To obtain the caries experience and, plaque accumulation severity and pit and fissure morphology in first permanent molars in 7-8 children in Wuhan, as a reasonable prediction of caries risk and preventive attention in the future, a convenient sample of five primary schools in the vicinity of the Wuhan University School and Hospital of Stomatology was drawn. Two calibrated examiners orally examined all present grade 2 children in the classroom, using standard caries plaque and tooth morphology criteria. Dental caries was scored at enamel （D2） and dentine （D3） for tooth and surface level. Independent variables were age, gender and school. Data analysis used analysis of variance and t-test. The sample comprised 1 043 7- and 8-year-olds. The prevalence of dental caries in permanent dentition was 8.7% and in primary dentition, 68.7%. Mean Decayed, Missing, Filled Teeth/S （DMFT/S） scores were 0.1 1 and . 14, respectively. Mean dmft/s scores were 2.8 and 5.0. The d-component constituted 75% of the d3mft index, while enamel carious lesions constituted 36% of the total number of carious lesions （d2,3-component）. Prevalence of medium and deep pits and fissures was 84.6%. Prevalence of medium and severe plaque accumulation was 67.4%. Prevalence of dental caries in the deciduous and permanent dentitions of 7- to 8-year-old children was high. Deed oits and fissures in high caries risk children should be sealed_

关键词： dental caries oral epidemiology plaque tooth morphology

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Evaluation of Ion Release from Four Dental Sealants

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Current Medical Science 2018年第3期38卷 524-529页

作者： Liang CHEN Su-juan ZENG Yu-hong LI min-quan du The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine ministry of Education School & Hospital of Stomatology Wuhan University Wuhan 430079 China Key Laboratory of Oral Medicine Guangzhou Institute of Oral Disease Stomatology Hospital of Guangzhou Medical University Guangzhou 510140 China

The purpose of this study was to determine the ion release from four commercially available pit-and-fissure sealants [3M Clinpro, 3M ConciseTM, BeautiSealant （BS）, and GI FX-Ⅱ）]. With each brand, 18 specimens were prepared. Their fluoride release in de-ionized water was measured by fluoride electrode, while the release of silicate （Si）, aluminum （A1）, sodium （Na）, calcium （Ca）, strontium （Sr）, and phosphorus （P） was measured by inductively coupled plasma atomic emission spectroscopy （ICP-AES） on days 1, 3, 7, 14, 21, and 28. The result showed that fluoride was not released from 3M ConciseTM. GI FX-II displayed the largest fluoride release, which, however, dropped rapidly on day 3.3M Clinpro exhibited less fluoride release than GI FX-II and BS did. At any time during the 28-day experimental period, GI FX-II released more Na than the other sealants （P〈0.001）. BS ranked the second in Na release, and a small amount of Na ions was released from the 3M Clinpro and 3M ConciseTM samples. Al ions were only detected from BS and GI FX-Ⅱ, but not from the 3M Clinpro and 3M ConciseTM. Additionally GI FX-II had the largest Si release among the four brands at any time during the experimental period （P〈0.001）. Ca ions were detected from 3M Clinpro and 3M ConciseTM, but not from GI FX-Ⅱ. BS released more Sr than the other sealants at any time during the experimental period （P〈0.001）. All the samples released similar amounts of P continuously during these 28 days. In conclusion, based on the type and the amount of ion release, BS is the best pit-and-fissure sealant among the four brands.

关键词： ion release dental sealant

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具有变截面流道的圆柱容器内流经环形填充层流动的研究

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水动力学研究与进展（A辑） 1993年第1期8卷 107-114页

作者：黄发瑞吴民权杜贫金大跃联合化学反应工程研究所华东化工学院分所上海200237

本文提出了具有变截面中心流道的圆柱容器内流经环形填充层流体流动的数学模型,并且对这一数学模型进行了计算和实验验证。结果表明,在中心流道截面积沿轴向作适当变化的情况下,仅增加有限的压降损失,便可以明显地改善径向流经填充层的... 详细信息

本文提出了具有变截面中心流道的圆柱容器内流经环形填充层流体流动的数学模型,并且对这一数学模型进行了计算和实验验证。结果表明,在中心流道截面积沿轴向作适当变化的情况下,仅增加有限的压降损失,便可以明显地改善径向流经填充层的速度分布的不均匀性。

关键词：圆柱容器环形填充层变截面流道

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A novel method for the spectrophotometric determination of cefradine by using sodium nitroprusside as chromogenic reagent

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Chinese Chemical Letters 2008年第12期19卷 1470-1474页

作者： Hua Zhang Ling Li Wu quan min Li Xin Zhen du College of Chemistry and Environmental Science Henan Normal University Xinxiang 453007 China College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou 730070 China Henan Radio and Television University Zhengzhou 453008 China

A novel method is developed for the determination of cefradine by using sodium nitroprusside as chromogenic reagent. The experiment indicates that a russety product is formed by the reaction of cefradine with sodium nitroprusside in basic solution, and the maximum absorption wavelength （λmax） of russety product is 505 rim. And the sensitization of tetradecyl benzyl dimethyl ammonium chloride for the reaction of cefradine with sodium nitroprusside is remarkable, The apparent molar absorption coefficient （5505） is 2.81 × 103 L/mol cm. The linear equation isA = 0.0657 ＋ 0.00804C （μg/mL） in the range of 1.50-55.0μg/mL of cefradine with a correlation coefficient r = 0.9992, and the detection limit is 1.38 p,g/mL. This method has been applied to determine cefradine in capsule and tablet samples.

关键词： Cefradine Sodium nitroprusside Chromogenic reagent Spectrophotometry

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Coordination bonds reinforcing mechanical strength of silicon anode to improve the electrochemical stability

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Rare Metals 2024年第11期43卷 5690-5700页

作者： Jin-Huan Li Hong-Qiang Xu min Wu quan du Yong-Bo Kuang Bo Yin Hai-Yong He Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China University of Chinese Academy of Sciences Beijing 101400China Chemistry and Chemical Engineering College Gannan Normal UniversityGanzhou 341000China

The severe volumetric expansion and poor conductivity of silicon when used as anode in lithium-ion batteries present challenges in maintaining the stability of electrochemical ***,the binding between silicon nanoparticles and carbon nanotubes(CNTs)is achieved by the utilization of sodium alginate(S A),which is then strengthened by the coordination between Ca^(2+)and the carboxyl group(-COO^(-))of SA,resulting in a stable conductive network with ionic transport *** consolidated binding relationship enables silicon-based anode material to possess high mechanical strength and strong deformation resistance,preventing the separation of silicon from CNTs ***,this silicon-based anode material demonstrates a discharge specific capacity of811 mAh·g^(-1)after 100 cycles at a current density of 1 A·g^(-1),and exhibits high rate performance,with a discharge specific capacity of 1612 mAh·g^(-1)at 2 A·g^(-1).

关键词： Lithium-ion batteries Silicon Mechanical strength Chemical coordination Cycle stability

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Steroid Receptor Coactivator 3 Regulates Synaptic Plasticity and Hippocampus-dependent Memory

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Neuroscience Bulletin 2021年第12期37卷 1645-1657页

作者： Hai-Long Zhang Bing Zhao Pin Yang Yin-quan du Wei Han Jianming Xu Dong-min Yin Key Laboratory of Brain Functional Genomics Ministry of Education and ShanghaiSchool of Life ScienceEast China Normal UniversityShanghai 200062China MOE Frontiers Center for Brain Science Institute for Translational Brain ResearchFudan UniversityShanghai 200032China Department of Molecular and Cellular Biology Baylor College of MedicineHoustonTX 77030USA

Steroid hormones play important roles in brain development and *** signaling of steroid hormones depends on the interaction between steroid receptors and their *** the function of steroid receptor coactivators has been extensively studied in other tissues,their functions in the central nervous system are less well *** this study,we addressed the function of steroid receptor coactivator 3(SRC3)–a member of the p160 SRC protein family that is expressed predominantly in the *** hippocampal development was not altered in Src3^(+/-) mice,hippocampus-dependent functions such as short-term memory and spatial memory were *** further demonstrated that the deficient learning and memory in Src3^(+/-) mice was strongly associated with the impairment of long-term potentiation(LTP)at Schaffer Collateral-CA1 *** studies indicated that Src3^(+/-) mutation altered the composition of N-methyl-D-aspartate receptor subunits in the postsynaptic densities of hippocampal ***,we showed that SRC3 regulated synaptic plasticity and learning mainly dependent on its lysine acetyltransferase *** together,these results reveal previously unknown functions of SRC3 in the hippocampus and thus may provide insight into how steroid hormones regulate brain function.

关键词： SRC3 Steroid receptor Synaptic plasticity Learning and memory Hippocampus N-Methyl-Daspartate receptor

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Simulation of Interference Nanolithography of Second-Exciting Surface-Plasmon Polartions for Metal Nanograting Fabrication

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Chinese Physics Letters 2011年第1期28卷 205-207页

作者： LIANG Hui-min WANG Jing-quan College of Science Hebei University of Engineering Handan 056038 Department of Physics Sichuan University Chengdu 610064

Second-exciting surface-polasmon-polariton （SPP） interference lithography （SE-SPPIL） designed by an improving attenuated total reflection （ATR） mode is suggested for fabricating metal nanograting. A metal film coated under a prism excites SPP first, and then the SPP energy transmits into another metal film and launches SPP again. An interlayer between two metal films is a thin resist coated on the second metal film. An interference nanopattern is formed in the resist when two SPP waves are launched symmetrically. After development, chemical or physical etching, the nanopattern is transferred into the metal film. A random thickness metal grating can be achieved as the thickness of the second metal film does not influence the interference pattern intensity. This scheme is promising for fabricating metal nanograting at low cost.

关键词： Condensed matter: electrical, magnetic and optical Optics, quantum optics and lasers Nanoscale science and low-D systems

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The Global Well-posedness of Strong Solutions to 2D MHD Equations in Lei-Lin Space

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Acta Mathematicae Applicatae Sinica 2023年第3期39卷 647-655页

作者： Bao-quan YUAN Ya-min XIAO School of Mathematics and Information Science Henan Polytechnic UniversityJiaozuo 454000China

In this paper, we study the Cauchy problem of the 2D incompressible magnetohydrodynamic equations in Lei-Lin space. The global well-posedness of a strong solution in the Lei-Lin space χ^(-1)(R^(2)) with any initial data in χ^(-1)(R^(2)) ∩ L^(2)(R^(2)) is established. Furthermore, the uniqueness of the strong solution in χ^(-1)(R^(2)) and the Leray-Hopf weak solution in L^(2)(R^(2)) is proved.

关键词： 2D MHD equations strong solutions Lei-Lin space weak-strong uniqueness

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A Non-symmetric Digital Image Secure Communication Scheme Based on Generalized Chaos Synchronization System

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Communications in Theoretical Physics 2005年第6X期44卷 1115-1124页

作者： ZHANG Xiao-Hong min Le-quan Applied Science School and Information Engineering School 100083 China Information Engineering School Jiangxi University of Science University of Science and Technology Beijing Beijing and Technology Ganzhou 341000 China

Based on a generalized chaos synchronization system and a discrete Sinai map, a non-symmetric true color （RGB） digital image secure communication scheme is proposed. The scheme first changes an ordinary RGB digital image with 8 bits into unrecognizable disorder codes and then transforms the disorder codes into an RGB digital image with 16 bits for transmitting. A receiver uses a non-symmetric key to verify the authentication of the received data origin, and decrypts the ciphertext. The scheme can encrypt and decz：Fpt most formatted digital RGB images recognized by computers, and recover the plaintext almost without any errors. The scheme is suitable to be applied in network image communications. The analysis of the key space, sensitivity of key parameters, and correlation of encrypted images imply that this scheme has sound security.

关键词： generalized chaos synchronization Sinai map image confusion non-symmetric key data origin authentication network communication

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New Explicit Periodic Wave Solutions and their Limits for Modified form of Camassa-holm Equation

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Acta Mathematicae Applicatae Sinica 2010年第3期26卷 513-524页

作者： quan-di Wang min-ying Tang Department of Mathematics South China University of Technology Guangzhou 510640 China

In this paper, we consider the following nonlinear equation ut＋2kux-uxxt＋au^2ux=2uxuxx＋uuxxx,which is a modified form of the Camassa-Holm equation. We construct four new explicit periodic wave solutions by bifurcation method of dynamical systems. We also obtain two explicit solitary wave solutions via the limits of the explicit periodic wave solutions. One of the two solitary wave solutions is new.

关键词： Camassa^Holm equation periodic wave solutions bifurcation method solitary wave solutions

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