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Lead Induces Different Responses of Two subpopulations of Phagocytes in the Holothurian Eupentacta fraudatrix

Journal of Ocean University of China 2018年第6期17卷 1391-1403页

作者： DOLMATOVA Lyudmila s. DOLMATOV Igor Yu. Laboratory of Biochemistry V.I.Il'ichev Pacific Oceanological Institute Far Eastern Branch Russian Academy of Sciences Laboratory of Comparative Cytology National Scientific Center of Marine Biology Far Eastern Branch Russian Academy of Sciences Department of Cell Biology and Genetics Far Eastern Federal University

In view of increasing lead pollution(Pb^(2+)) of coastal waters, the compensatory abilities of holothurians need to be assessed. The goal of the work is to clarify the functional and phenotypical differences between two types of phagocytes(P1 and P2) in Eupentacta fraudatrix exposed to Pb(NO_3)_2. It has been shown that 2 mg L^(-1) lead exposure for 48 h increases the number of P2 phagocytes as compared to P1 cells, does not significantly affect cell viability in both P1 and P2 phagocyte fractions, and significantly enhances chromatin condensation in P2 but not in P1 phagocytes. A lead concentration of 4 mg L^(-1) increases the number of P1 phagocytes compared to that of P2 type, and does not change cell viability and chromatin condensation in P1 phagocytes. In the P2 type, it decreases cell viability and does not influence the level of apoptosis. The protection against lead-induced apoptosis is apparently mediated by the activities of antioxidant enzymes, especially glutathione s-transferase. The differences in labeling cell surface receptors of P1 and P2 phagocytes by plant lectins also indicate the specific phenotypic properties of these cells. The results clarify the potential and GsH-dependent mechanisms of immune adaptation in holothurians that have been shortly exposed to lead at concentrations close to the maximum environmentally relevant level in coastal waters. Additionally, P1 and P2 phagocytes are first shown to have different functions and phenotypes during the response to lead, which indicates the complexity of the phagocytic system in holothurians and contributes to understanding the immunity evolution.

关键词： amoebocytes antioxidant capacity apoptosis cell adaptation lead plant lectin con A DBA PNA sBA

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Influence of Functionalization on the structural and Mechanical Properties of Graphene

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Computers, Materials & Continua 2017年第2期53卷 109-127页

作者： L.s.Melro L.R.Jensen Department of Materials and Production Aalborg UniversityAalborgDenmark Corresponding author:liliana@m-tech.aau.dk

Molecular dynamics simulations were applied in order to calculate the Young’s modulus of graphene functionalized with carboxyl,hydroxyl,carbonyl,hydrogen,methyl,and ethyl *** influence of the grafting density with percentages of 3,5,7,and 10%and the type of distribution as a single cluster or several small clusters were also *** results show that the elastic modulus is dependent on the type of functional *** increasing coverage density also evidenced a decrease of the Young’s modulus,and the organization of functional groups as single cluster showed a lesser impact than for several small ***,the bond length and angle distribution probability analyses reveal that lengths and angles are affected with increasing functionalization suggesting more out-of-plane displacements of the carbon atoms within the graphene structure.

关键词： Functionalization graphene molecular dynamics Young’s modulus structural properties

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Error resilient concurrent video streaming over wireless mesh networks

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Journal of Zhejiang University-science A(Applied Physics & Engineering) 2006年第5期7卷 684-695页

作者： CHUAH Chen-nee YOO Ben s.J. Electrical and Computer Engineering Department University of California Davis 95616 USA Electrical and Computer Engineering Department

In this paper, we propose a multi-source multi-path video streaming system for supporting high quality concurrent video-on-demand (VoD) services over wireless mesh networks (WMNs), and leverage forward error correction to enhance the error resilience of the system. By taking wireless interference into consideration, we present a more realistic networking model to capture the characteristics of WMNs and then design a route selection scheme using a joint rate/interference-distortion optimiza- tion framework to help the system optimally select concurrent streaming paths. We mathematically formulate such a route selec- tion problem, and solve it heuristically using genetic algorithm. simulation results demonstrate the effectiveness of our proposed scheme.

关键词： Wireless mesh network, Concurrent video streaming, Interference

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Physical studies of some Hydrazinobenzoic Acid Complexes

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Journal of Materials science & Technology 2005年第1期21卷 140-144页

作者： M.G.Abd El Wahed s.Abd El Wanees M.El Gamel s.Abd El Haleem Faculty of science Zagazig University Zagazig EgyptFaculty of Science Zagazig University Zagazig EgyptFaculty of Science Zagazig University Zagazig EgyptFaculty of Science Zagazig University Zagazig Egypt

The stability constants of complexes of 2-hydrazinobenzoic acid and 4-hydrazinobenzoic acid with Ni (Ⅱ), Cu (Ⅱ), Zn (Ⅱ), Cd (Ⅱ), and Hg (Ⅱ) were determined potentiometricaIly at different temperatures. The thermodynamic parameters, △G0, △H0, and △s0 were calculated and proved that the complexation process is spontaneous and endothermic. The thermodynamic functions were analyzed in terms of electrostatic and non-electrostatic components and the results reveal that ionic bonds are formed between the studied ligands and metal ions. Conductometric titration was shown that the stoichiometry of the formed complexes are M:L and M:2L. The structure of the prepared solid complexes was characterized using IR, 1H NMR, 13C NMR spectroscopies as well as X-ray diffraction technique. Finally electrical conductivity of the ligands and their copper complexes was measured and shown that the ligands have a semiconductor behaviour.

关键词： Potentiometric titration stability constants Thermodynamic parameters structure of metal complexes

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An Efficient Framework for Utilizing Underloaded servers in Compute Cloud

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Computer systems science & Engineering 2023年第1期44卷 143-156页

作者： M.Hema s.Kanaga suba Raja Department of Information Technology Easwari Engineering CollegeChennai600089India Department of Computer science and Engineering Easwari Engineering CollegeChennai600089India

In cloud data centers,the consolidation of workload is one of the phases during which the available hosts are allocated *** phenomenon ensures that the least possible number of hosts is used without compromise in meeting the service Level Agreement(sLA).To consolidate the workloads,the hosts are segregated into three categories:normal hosts,under-loaded hosts,and over-loaded hosts based on their *** is to be noted that the identification of an extensively used host or underloaded host is challenging to ***-old values were proposed in the literature to detect this *** current study aims to improve the existing methods that choose the underloaded hosts,get rid of Virtual Machines(VMs)from them,andfinally place them in some other *** researcher proposes a Host Resource Utilization Aware(HRUAA)Algorithm to detect those underloaded and place its virtual machines on different hosts in a vibrant Cloud *** mechanism presented in this study is contrasted with existing mechanisms *** results attained from the study estab-lish that numerous hosts can be shut down,while at the same time,the user's workload requirement can also be *** proposed method is energy-efficient in workload consolidation,saves cost and time,and leverages active hosts.

关键词： Workload consolidation energy consumption under load server resource utilization

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Global Attractors and Determining Modes for the 3D Navier-stokes-Voight Equations

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Chinese Annals of Mathematics,series B 2009年第6期30卷 697-714页

作者： Varga K.KALANTAROV Edriss s.TITI Department of Mathematics Ko UniversityRumelifeneri YoluSariyer 34450IstanbulTurkey Department of Mathematics and Department of Mechanical and Aerospace Engineering University of California IrvineCalifornia 92697USA Department of Computer science and Applied Mathematics Weizmann Institute of ScienceRehovot 76100Israel

The authors investigate the long-term dynamics of the three-dimensional Navier- stokes-Voight model of viscoelastic incompressible fluid. specifically, upper bounds for the number of determining modes are derived for the 3D Navier-stokes-Voight equations and for the dimension of a global attractor of a semigroup generated by these equations. Viewed from the numerical analysis point of view the authors consider the Navier-stokes-Voight model as a non-viscous （inviscid） regularization of the three-dimensional Navier-stokes equations. Furthermore, it is also shown that the weak solutions of the Navier-stokes- Voight equations converge, in the appropriate norm, to the weak solutions of the inviscid simplified Bardina model, as the viscosity coefficient v →0.

关键词： Navier-stokes-Voight Navier-stokes-Voigt Global attractor Determining modes Regularization of the Navier-stokes Turbulence models Viscoelastic models

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Effect of Acetylene Concentration on Denitrification and Related Microbial Processes in Anaerobically Incubasted soil slurries

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Pedosphere 1996年第3期6卷 201-208页

作者： CHENTONGBIN s.sTRUWE 等 ExperimentalstationforgroecologyandEnvironmentalTechnology InstituteofGeopraphyChineseAcademyofScien

In order to study the influence of difference in C2H2 concentration on the production of CO2,N2O,NH4-N and volatile fatty acids(VFA).soil slurries with a gradient in C2H2 concentration were anaerobically incubated at 25℃ for 2 ***,butyrate and CO2 production and NH4-N accumulation were inhibited in the slurres in the presence of C2H2;and the inhibition effect increased with increasing C2H2 from 0 to 20 kPa in the headspace gas of the incubation ***,N2O,isobutyrate and propionate production was not obviously different among the slurres amended with C2H2 from 2.5 to 20 ***,the results implied that the C2H2 did not promote the inhibition but only increased the side effect on other microbial *** C2H2 of 2.5 kPa was suggested to be the optimum choice for the present denitrification study.

关键词：厌氧培养土壤泥浆反硝化作用微生物过程乙炔浓度

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Existence of solutions to a singular Initial Value Problem

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Acta Mathematica sinica,English series 2007年第10期23卷 1797-1806页

作者： R.P.AGARWAL P.s.KELEVEDJIEV Department of Mathematical sciences Florida Institute of TechnologyMelbourneFlorida 32901USA Department of Mathematics Technical University of SlivenSlivenBulgaria

Under the sign assumptions we investigate the global existence of solutions of the initial value problem x＇ =f（t, x, x＇）, x（0） = A, where the scalar function f（t, x,p） may be singular at x = A.

关键词： initial value problems first order differential equations singularity existence global solutions

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Ageing behaviour of a polyethylene blend:influence of chemical defects and morphology on charge transport

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High Voltage 2020年第3期5卷 270-279页

作者： somyot Tantipattarakul Alun s.Vaughan Thomas Andritsch Tony Davies High Voltage Laboratory University of SouthamptonSouthamptonSO171BJUK Maintenance Division Electricity Generating Authority of ThailandNonthaburiThailand

Abstract:The properties of novel cable insulation systems will rely critically upon the morphology of the ***,a blend of high and low-density polyethylene(PE)was processed in order to generate three sets of samples with different *** influence of thermo-oxidative ageing at 120℃ was then *** resulting chemical changes included the introduction of unsaturation and oxygen-containing groups and were determined by antioxidant consumption and oxygen *** chemical defects were found to be concentrated in the fraction of each system that was molten at 120°C and,consequently,served to inhibit recrystallisation following *** resulting spatial distribution of charge trapping sites was therefore strongly dependent on *** electrical conductivity of each system varied non-monotonically with ageing:short times reduced the conductivity;a rapid increase in conductivity over five orders of magnitude occurred beyond a critical ageing *** the pronounced structural differences between the morphologically distinct sets of samples,all exhibited comparable conductivity values beyond this threshold,implying that while charge transport is strongly influenced by chemical factors,crystallinity is relatively *** experimental finding appears at odds with theoretical studies of the electronic states in crystalline and amorphous PE.

关键词： charge chemical conductivity

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Boundedness of the Anisotropic Maximal and Anisotropic singular Integral Operators in Generalized Morrey spaces

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Acta Mathematica sinica,English series 2011年第12期27卷 2361-2370页

作者： Vagif s. GULIYEV Rza Ch. MUsTAFAYEV Department of Mathematics Ahi Evran University Kirsehir 40200 Turkey Institute of Mathematics and Mechanics ANAS Baku AZl141 Azerbaijan

In this paper we give the conditions on the pair （~1, W2） which ensures the boundedness of the anisotropic maximal operator and anisotropic singular integral operators from one generalized Morrey space Mp,w1 to anot... 详细信息

关键词： Generalized Morrey spaces anisotropic maximal operator Hardy operator anisotropic singular integral operator

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