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International Sports Biomechanics Research Trend

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中国体育科技 2009年第1期45卷 26-28页

作者： Hong You-lian The Chinese University of Hong Kong Hong Kong China

The Trend The trend of current international sports biomechanics research is evident in the papers presented in the recent annual International Conferences on Biomechanics in Sports.

关键词：运动生物力学体育运动锻炼方法体育设施培训方法

Acid Phosphatase Activity May Affect the Tuber Swelling by Partially Regulating Sucrose-mediated Sugar Resorption in Potato

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journal of Integrative Plant Biology 2008年第6期50卷 733-741页

作者： Da-Yong Wang Yong lian De-Wei Zhu Department of Genetics and Developmental Biology Southeast University Nanjing 210009 China Key Laboratory of Developmental Genes and Human Disease Ministry of Education Nanjing 210009 China Institute of Vegetative and Flowers Chinese Academy of Agncultural Sciences Beijing 100081 China

APase activity is involved in regulating many physiological and developmental events by affecting the resorption process. In this study, we investigate the role of APase activity in tuber development in potato. APase activities were mainly localized in cytoplasm, gaps among cells and stroma of amyloplasts of parenchyma cells at the stage of tuber swelling. AP1, encoding a putative APase, was also highly expressed in swelling tubers and a low level of expression was observed in elongated stolons and matured tubers. Inhibition of APase activity by applying Brefeldin A, an inhibitor of APase production and secretion, significantly suppressed the tuber swelling and moderately affected the stolon elongation and the tuberization frequency. During tuber development, sucrose serves as the main soluble sugar for long-distance transportation and resorption. Moreover, inhibition of APase activity by Brefeldin A markedly reduced the sucrose content in tubers and further decreased the starch accumulation, suggesting that the function of APase in regulating the tuber swelling might be at least partially mediated by the sugar resorption. Exogenous sucrose treatments further indicate the important role of sucrose-mediated sugar resorption in tuber swelling. These results suggest that the APase activity might affect the tuber swelling by partially regulating the sucrose-mediated sugar resorption.

关键词： APase activity potato sucrose-mediated sugar resorption tuber swelling

Effects of temperature and discharge parameters on ozone concentration of negative corona discharge

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journal of Environmental Sciences 2003年第6期15卷 796-799页

作者： WANG Hai-jun SHENG lian-xi XU De-xuan Department of Environmental Science and Engineering College of Urban and Environmental ScienceNortheast Normal UniversityChangchun 130024China.

The relationship of the ozone generation and the heating power, corona wire surface temperature, discharge electrode and netting electrode was studied during the negative corona discharge. The experimental results showed that the ozone concentration reduced with applied voltage decrease. With heating power increase, the ozone concentration of unit current decreased at exponential rate and it almost change no longer over 0.40 W. Under given temperature, the lower the applied voltage was, the smaller the ozone concentration was; while under given applied voltages, only over 11 kV could decrease with the surface temperature increase. The ozone concentration decreased with the lengthening of corona wire, and could reduced to 10 ppb under experimental condition of 14.2 kV; it also decreased with the shortening of wire diameter, and could decrease 67% at best in the given condition. Moreover, it decreased with the increasing size of netting electrode mesh. At the anion current of 1.65 μΑ, the ozone concentration of 5.0×5.0 cm 2 is only 41% of that of 3.3×3.3 cm 2.

关键词： ozone negative corona discharge anion current

A novel method to synthesize polyaluminum chloride with a membrane reactor

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journal of Environmental Sciences 2004年第3期16卷 482-486页

作者： HEFei jIAZhi-qian PENGYue-lian WANGPei-jing LIUZhong-zhou ResearchCenterforEco-EnvironmentalSciences ChineseAcademyofSciencesBeijing100085China

Al 13 or Alb is usually regarded as the most efficient species of polyaluminum chloride(PAC), the performance flocculant for water treatment. This paper was intended to report a new method to synthesize PAC with high content Al b, by using the membrane reactor. NaOH solutions were managed to permeate slowly through the micropores of ultrafiltration membrane into AlCl 3 solutions under the suitable transmembrane pressure(TMP). Meanwhile NaOH drops size was limited to nano scale, resulting in dramatical reduction of the characteristic diffusion time and great increment of contact interface between the strong base and Al ions in solution to favor the formation of Al(OH) - 4, the precursor of Al 13 , so few precipitates and much Al b are produced. When the initial concentration of AlCl 3/NaOH is 0 40/2 0 (mol/L), MWCO =10000, TMP =0 0085 MPa, T =305 K and B (molar ratio of OH -/Al 3+ )=2 25, the quantity of Al b attains about 80%. The results of 27 Al NMR determination showed that the Al 13 content is equal to Al b content. And our PAC product has shown better flocculation effects than the commercial product.

关键词： membrane reactor polyaluminum chloride

Synthesis and Crystal Structure of a Co(II) Complex with Schiff Base and Imidazole Ligand

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Chinese journal of Structural Chemistry 2006年第5期25卷 567-571页

作者： WU lian-Bin HU Zi-Qiang LAI Guo-Qiao Key Laboratory of Organosilicon Chemistry and Material Technology of Education Ministry Hangzhou Teachers University Hangzhou 310012 China

The title compound, [Co（C3H4N2）2（C22H18N2O4）]·5H2O （Mr = 659.56）, has been prepared and its crystal structure was determined by X-ray diffraction method. The crystal belongs to monoclinic, space group P21/n, a = 9.6808（2）, b = 26.7204（5）, c = 12.7993（3） A, β = 100.9340（10）°, V= 3250.75（12） A^3, Z = 4, Dc = 1.348 g/cm^3,μ = 0.586 mm^-1, F（000） = 1380, S = 1.131, R = 0.0689 and wR = 0.1883 for 4782 observed reflections （Ⅰ 〉 2σ（Ⅰ））. The title crystal consists of Co（Ⅱ） complex and lattice water molecules. The Co（Ⅱ） complex assumes a distorted octahedral coordination geometry, formed by one Schiff base dianion phenylenediamine-3-methoxysali-cylaldehyde and two imidazole ligands. The π-π stacking interaction occurs between nearly parallel benzene rings of the neighboring complexes.

关键词： cobalt(Ⅱ) complex Schiff base crystal structure π-π stacking

Identification and Characterization of Reverse Transcriptase Domain of Transcriptionally Active Retrotransposons in Wheat Genomes

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journal of Integrative Plant Biology 2005年第5期47卷 604-612页

作者： Yi-MiaoTANG You-ZhiMA lian-ChengLI Xing-GuoYE KeyLaboratoryofCropGeneticsandBreeding MinistryofAgricultureInstituteofCropBreedingandCultivationChineseAcademyofAgriculturalSciencesBeijing100081China

To clarify activation characterization of wheat (Triticum aestivum L.) retrotransposons, transcriptionally active Ty1-copia retrotransposons were found in wheat by using RT-PCR to amplify the RT domain. Sequence analysis of random RT-PCR clones reveals that Ty1-copia retrotransposons are highly heterogeneous and can be divided into at least four groups, which are tentatively named TaRT-1 to *** blot hybridization indicates that TaRT- 1 exists in the wheat genome as multiple copies (at 30 000 copies/a hexaploid genome (ABD)). Northern blot hybridization showed that TaRT-1 is only expressed at a low level under normal conditions in seedlings, but at a high level when induced by powdery mildew fungus, jasmonic acid (jA) and salicylic acid (SA). These results suggest that the TaRT-1 expression is highly sensitive to biotic and abiotic stresses.

关键词： abiotic stress biotic stress retrotransposons reverse transcriptase Triticum wheat

A case report of intramyocardial dissecting hematoma:a challenging diagnosis

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World journal of Emergency Medicine 2023年第5期14卷 405-407页

作者： Yaoyao Zhu Tong Wang Longyuan jiang lian liang Department of Emergency Medicine the Eighth Affi liated HospitalSun Yat-sen UniversityShenzhen 518033China Department of Emergency Medicine Sun Yat-sen Memorial HospitalSun Yat-sen UniversityGuangzhou 510120China Institute of Cardiopulmonary Cerebral Resuscitation Sun Yat-sen UniversityGuangzhou 510120China

Intramyocardial dissecting hematoma (IDH) is an uncommon complication of myocardial infarction that can potentially lead to cardiac rupture.^([1])Two distinguishable types of cardiac rupture have been identified:a simple tear,which is the most common case and is characterized by a lineal or tortuous tear along the myocardial wall,and complex hemorrhagic *** is generally classified as complex hemorrhagic dissection,in which blood infiltrates into the myocardial wall.^([2])IDH is characterized by a serpiginous tract within the myocardium,which is also known as subepicardial *** mechanisms of IDH are multifactorial and contribute to the rupture of intramyocardial vessels,diminished tensile strength of the infarcted myocardium.

关键词： rupture hematoma diagnosis

Synthesis and ion exchange properties for Cs^+ of ammonium-type mordenite

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Rare Metals 2015年第10期34卷 752-756页

作者： Dian-Quan Dong jian-Guo Zheng Xian-lian Han College of Chemical Engineering School of Qingdao University of Science and Technology

Cesium content in the seawater is 3.0 9 10-4 mg·L-1, and ammonium-type mordenite was used to exchange cesium from cesium source. K-type mordenite was obtained by hydrothermal synthesis method. After ammonium-modified, ion exchange properties such as saturated ion exchange capacities and selectivity coefficients for alkali metal ions were determined. At the same time, ion exchange isothermal curves of ammonium-type mordenite for Cs+ and NH4+ were determined at 25°*** electrolyte solution theory was used to work out activity coefficients of the system, and the Kielland diagram of the ion exchange system was obtained. The calculated equilibrium constant(Ka) and ion free enthalpy(DG0) of mordenite for Cs+ and NH4+ are 1.455 and -930.3j·mol-1, respectively, indicating that ion exchange process of ammonium-type mordenite for cesium is a spontaneous process.

关键词： Ion exchange Thermodynamics Mordenite Cesium

Implementation of a new network equilibrium model of travel choices

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journal of Traffic and Transportation Engineering(English Edition) 2018年第2期5卷 105-115页

作者： You-lian Chu Parsons Transportation Group Inc. New York NY 20005 USA

This paper develops a new combined network equilibrium model by using more behaviorally sound mathematical forms to represent the four travel choices（i.e., trip frequency,destination, mode, and route） in a conventional travel demand forecasting process. Trip frequency choice relates to the traveler decision on “making a trip” or “not making a trip”so it is given by a binary logit model. Destination choice is formulated as a parameterized dogit model of which the captivity parameters（expressed as functions of independent variables） allow individual travelers to be captive to specific destinations. Mode choice is given by a two-level nested logit model to avoid IIA restriction. Trip assignment is based on Wardrop＇s “user-optimized” principle. All model forms describing travel choices are in response to the level of services incurred by the transportation system. Through the introduction of inclusive values, the traveler decisions concerning trip frequency, destination, mode, and route choices are inherently interrelated and jointly *** obtain solutions of the new combined model, it was reformulated as an equivalent convex programming problem with linear constraints, a great advantage from the computational aspects. The model was applied empirically to a transportation network in New jersey. The application results show that the new model is consistently better than the commonly used logit combined model in reproducing the observed trip flows from origin zones, origin to destination（O-D） trip flows, O-D trip flows by mode, and trip flows on the network links.

关键词： Combined model Parameterized dogit model Nested loot model Wardrop's user equilibrium Equivalent minimization problem