Home / Advanced Search

  • Title/Keywords

  • Author/Affliations

  • Journal

  • Article Type

  • Start Year

  • End Year

Update SearchingClear
  • Articles
  • Online
Search Results (620)
  • Open Access

    ABSTRACT

    Risk simulation of nanomaterials pollution in power engineering

    A.A.Bayramov1

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.15, No.1, pp. 19-26, 2010, DOI:10.3970/icces.2010.015.019

    Abstract As we know, anthropogenic activities of Power Engineering create wastewater and air pollution, lead to aerosol attenuation of solar radiation and to growth of entropy on the Earth and, as result, climate change. The human Power activities disturb heat and entropy balance and impair ecology. Also, this leads to greenhouse effect and, as result, to climate change. Wastewater in river and sea basins as well as air pollution can influence an exchange of energy between sunlight on the Earth and long-wave radiation leaving in space.
    In the paper the role of nanomaterials pollution in Power Engineering More >

  • Open Access

    ABSTRACT

    Numerical solutions of time-space fractional advection--dispersion equations

    Xia Yuan1, Wu Jichun2, Zhou Luying3

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.9, No.2, pp. 117-126, 2009, DOI:10.3970/icces.2009.009.117

    Abstract This paper establishes a difference approximation on time-space fractional advection-dispersion equations. Based on the difference approximation an ideal numerical example has been solved, and the result is compared with the one of the rigorous time fractional advection-dispersion equation and the rigorous space fractional advection-dispersion equation respectively. The results show: when time fractional order parameter γ=1 or space fractional order parameter α=2, the numerical calculation result of the time-space fractional advection-dispersion equations is in accordance with that of the rigorous time fractional advection-dispersion equation or the rigorous space fractional advection-dispersion equation. The variation law of the result More >

  • Open Access

    ARTICLE

    Graphene-Based 3D Xerogel as Adsorbent for Removal of Heavy Metal Ions from Industrial Wastewater

    Purnendu, Soumitra Satapathi*

    Journal of Renewable Materials, Vol.5, No.2, pp. 96-102, 2017, DOI:10.7569/JRM.2016.634134

    Abstract Graphene-based 3D porous xerogel was designed through molecular self-assembly of graphene oxide on chitosan matrix and its application in removal of different heavy metal ions from wastewater was investigated. The synthesized xerogel was characterized through FTIR, SEM, XRD and BET surface area analysis. Heavy metal ions, including Pb(II), Cd(II), and Hg(II), were removed from wastewater using this graphene-chitosan (GO-Cs) xerogel and the removal efficiency was monitored through inductively coupled plasma mass spectrometry (ICP-MS). The effect of GO-Cs composition and pH on adsorption efficiency as well as the kinetics of adsorption was studied in detail. The More >

  • Open Access

    ARTICLE

    Cellulose Nanomaterials as Binders: Laminate and Particulate Systems

    Mehdi Tajvidi1*, Douglas J. Gardner2, Douglas W. Bousfield3

    Journal of Renewable Materials, Vol.4, No.5, pp. 365-376, 2016, DOI:10.7569/JRM.2016.634103

    Abstract A novel application of cellulose nanomaterials, particularly cellulose nanofibrils (CNF) as a binder in conventional and novel laminate and particulate composite systems is discussed. Using cellulose nanomaterials as a reinforcing agent in conventional polymer composites faces several difficulties: 1) there are no easy ways to dry the CNF and maintain nanoscale dimensions, 2) there are compatibility issues related to cellulose-polymer bonding, and 3) there are issues related to obtaining a good distribution and redispersion of nanoscale materials inside a polymer matrix. An alternative strategy is applications in which cellulose nanomaterials can be used in the… More >

  • Open Access

    REVIEW

    Opportunities for Cellulose Nanomaterials in Packaging Films: A Review and Future Trends

    Nicole M. Stark

    Journal of Renewable Materials, Vol.4, No.5, pp. 313-326, 2016, DOI:10.7569/JRM.2016.634115

    Abstract Performance requirements for packaging films may include barrier properties, transparency, flexibility, and tensile strength. Conventional packaging materials, such as plastic films and laminates, are typically made from petroleum-based polymers. Currently, there is a drive to develop sustainable packaging materials. These alternative materials must be able to be manufactured economically and on a commercial scale, exhibit barrier properties and transparency, and provide adequate mechanical performance. As a biobased, renewable material, cellulose nanomaterials (CNs) are ideally suited to be used in sustainable packaging applications. CNs include cellulose nanocrystals (CNCs) and cellulose nanofibrils (CNFs) and each can provide More >

  • Open Access

    ARTICLE

    Amentoflavone Suppresses Cell Growth and Invasion in Renal Carcinoma Cells by Activating PPARγ

    Kun Fan1,2, Xiaofu Qiu2, Yu Fu2, Kangjian Lin, Huanhui Li2, Guosheng Yang *,1,2

    Molecular & Cellular Biomechanics, Vol.14, No.1, pp. 33-45, 2017, DOI:10.3970/mcb.2017.014.035

    Abstract This study intends to investigate the role of amentoflavone(AF) in human clear-cell renal cell carcinoma (ccRCC) and to elucidate underlying molecular mechanisms. Materials and Methods: Human RCC cell lines Caki-1 and 786-O were used in this study. Cell proliferation, apoptosis, cell cycle distribution and invasion assays were conducted to analyze the effect of AF against ccRCC in vitro. Xenograft model and pulmonary metastasis animal model were established to evaluate the vivo therapeutic efficacy and against pulmonary metastasis ability of AF, respectively. Results: Our findings revealed that AF selectively suppressed tumor cell proliferation in a dose- and More >

  • Open Access

    ARTICLE

    Kinetics Analysis of Binding between Melanoma Cells and Neutrophils

    Meghan H. Hoskins*, Cheng Dong∗,†

    Molecular & Cellular Biomechanics, Vol.3, No.2, pp. 79-88, 2006, DOI:10.3970/mcb.2006.003.079

    Abstract It has been determined previously that polymorphonuclear leukocytes, or PMNs, can facilitate melanoma cell extravasation through the endothelium under shear conditions [1,2]. The interactions between melanoma cells and PMNs are mediated by the β2-integrins expressed by PMNs and intercellular adhesion molecules (ICAM-1) expressed on melanoma cells. In this study, the kinetics of these interactions was studied using a parallel plate flow chamber. The dissociation rates were calculated under low force conditions for ICAM-1 interactions with both β2-integrins, LFA-1 (CD11a/CD18) and Mac-1 (CD11b/CD18), together and separately by using functional blocking antibodies on PMNs. The kinetics of PMNs More >

  • Open Access

    ARTICLE

    Melanoma Cell Extravasation under Flow Conditions Is Modulated by Leukocytes and Endogenously Produced Interleukin 8

    Cheng Dong1,2,3, Margaret J. Slattery2,3, Shile Liang3, Hsin-Hsin Peng2

    Molecular & Cellular Biomechanics, Vol.2, No.3, pp. 145-160, 2005, DOI:10.3970/mcb.2005.002.145

    Abstract Attachment of tumor cells to the endothelium (EC) under flow conditions is critical for the migration of tumor cells out of the vascular system to establish metastases. Innate immune system processes can potentially promote tumor progression through inflammation dependant mechanisms.\nobreakspace {} White blood cells, neutrophils (PMN) in particular, are being studied to better understand how the host immune system affects cancer cell adhesion and subsequent migration and metastasis. Melanoma cell interaction with the EC is distinct from PMN-EC adhesion in the circulation. We found PMN increased melanoma cell extravasation, which involved initial PMN tethering on… More >

  • Open Access

    ARTICLE

    Network Embedding-Based Anomalous Density Searching for Multi-Group Collaborative Fraudsters Detection in Social Media

    Chengzhang Zhu1, 2, Wentao Zhao2, *, Qian Li1, Pan Li2, Qiaobo Da3

    CMC-Computers, Materials & Continua, Vol.60, No.1, pp. 317-333, 2019, DOI:10.32604/cmc.2019.05677

    Abstract Detecting collaborative fraudsters who manipulate opinions in social media is becoming extremely important in order to provide reliable information, in which, however, the diversity in different groups of collaborative fraudsters presents a significant challenge to existing collaborative fraudsters detection methods. These methods often detect collaborative fraudsters as the largest group of users who have the strongest relation with each other in the social media, consequently overlooking the other groups of fraudsters that are with strong user relation yet small group size. This paper introduces a novel network embedding-based framework NEST and its instance BEST to… More >

  • Open Access

    ARTICLE

    Outage Capacity Analysis for Cognitive Non-Orthogonal Multiple Access Downlink Transmissions Systems in the Presence of Channel Estimation Error

    Yinghua Zhang1,2, Yanfang Dong2, Lei Wang1, Jian Liu1,*, Yunfeng Peng1, Jim Feng3

    CMC-Computers, Materials & Continua, Vol.60, No.1, pp. 379-393, 2019, DOI:10.32604/cmc.2019.05790

    Abstract In this paper, we propose a downlink cognitive non-orthogonal multiple access (NOMA) network, where the secondary users (SUs) operate in underlay mode. In the network, secondary transmitter employs NOMA signaling for downlink transmission, and the primary user (PU) is interfered by the transmission from SU. The expressions for the outage probabilities are derived in closed-form for both primary and secondary users in the presence of channel estimation error. Numerical simulation results show that the channel estimation error and the inter-network interference cause degradation of the downlink outage performance. Also the power allocation and the location More >

Displaying 601-610 on page 61 of 620. Per Page