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  • Open Access

    ARTICLE

    3D Bio-Plotted Composite Scaffold Made of Collagen Treated Hydroxyapatite-Tricalciumphosphate for Rabbit Tibia Bone Regeneration

    Pranav S. Sapkal1*, Abhaykumar M. Kuthe1, Divya Ganapathy2, Shantanu C. Mathankar3, Sudhanshu Kuthe4

    Molecular & Cellular Biomechanics, Vol.13, No.2, pp. 115-136, 2016, DOI:10.3970/mcb.2016.013.131

    Abstract Biphasic calcium phosphate scaffolds with 20/80 HA/TCP ratio were fabricated using the 3D-Bioplotting system to heal critical size defects in rabbit tibia bone. Four different architectures were printed in a layer by layer fashion with lay down patterns viz. (a) 0°– 90°, (b) 0°– 45°– 90°– 135°, (c) 0°–108°– 216° and (d) 0°– 60°– 120°. After high-temperature sintering scaffolds were coated with collagen and were further characterized by (FTIR) Fourier Transform Infrared Spectroscopy, (SEM) Scanning Electron Microscopy, (XRD) X-Ray diffraction, Porosity analysis and Mechanical testing. Scaffold samples were tested for its ability to induce cytotoxicity… More >

  • Open Access

    ARTICLE

    Cryopreservation of Cyrtopodium hatschbachii Pabst (Orchidaceae) immature seeds by encapsulation-dehydration

    MAURO RODRIGO SURENCISKI*, EDUARDO ALBERTO FLACHSLAND, GRACIELA TERADA, LUIS AMADO MROGINSKI, HEBE YOLANDA REY

    BIOCELL, Vol.36, No.1, pp. 31-36, 2012, DOI:10.32604/biocell.2012.36.031

    Abstract The aim of the present study was to investigate the efficiency of the encapsulation-dehydration technique for cryopreservation of Cyrtopodium hastchbachii Pabst seeds. Immature seeds of this species were cryopreserved by an encapsulation-dehydration technique. Seeds of five immature pods, 120 days after pollination, were encapsulated in 3% calcium alginate matrix and pretreated in liquid medium supplemented with 0.08 M sucrose (24 h), 0.15 M sucrose (24 h), 0.25 M sucrose (48 h), 0.5 M sucrose (24 h) and 0.75 M sucrose (24 h) in shaker at 60 rpm. Alginate beads were dehydrated 5 h in silicagel and More >

  • Open Access

    ARTICLE

    Hyperhydricity control of in vitro shoots of Turbinicarpus valdezianus (Möller) GL & F

    García Osuna HT, A Benavides Mendoza, L Escobedo Bocardo, JA Villarreal Quintanilla, E Cornejo Oviedo

    Phyton-International Journal of Experimental Botany, Vol.80, pp. 175-179, 2011, DOI:10.32604/phyton.2011.80.175

    Abstract Turbinicarpus valdezianus is a species under special protection, according to the current law NOM-059-ECOL-2010. It spreads preferably through shoot proliferation in vitro. A common problem associated with the propagation of this species by tissue culture is the hyperhydricity or excess of water accumulation in the tissues of shoots explants. The literature on this topic indicates that such response is related with oxidative stress. Because of this, the effects of inhibitors of the gibberellins [paclobutrazol (PBZ) and calcium prohexadione (PCa)] and salicylic (SA) and benzoic acids (BA) were tested to diminish the hiperhydrycity of the sprouts, which was… More >

  • Open Access

    ABSTRACT

    Calcium Response and Transfer in Bone Cell Network with or without Gap Junctions under Mechanical Stimulation

    Bo Huo, Man Hu, Ping Li

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.18, No.4, pp. 103-104, 2011, DOI:10.3970/icces.2011.018.103

    Abstract It has been widely accepted that movement of human body causes the fluid flow through pores or channels inside bone and subsequently on osteoblasts on the surface of trabeculae and osteocytes inside lacunae. The mechanism of calcium response in a bone cell and calcium transfer between bone cells is critical in understanding the communication between bone cells and calcium deposition on bone matrix. Our previous works have demonstrated that when micropatterned osteoblastic cell network with gap junctions was exposed to fluid flow, extracellular ATP diffusion following the activation of calcium response in neighboring cells plays… More >

  • Open Access

    ARTICLE

    Birefringence Simulations of Calcium Fluoride Single Crystal Used as Chamber Window of Gas Laser Light Source

    Yuta Kitamura1, Noriyuki Miyazaki1, Takahito Kumazaki2, Naoto Nagakura3, Yasuhiro Hashimoto3, Isao Masada3

    CMES-Computer Modeling in Engineering & Sciences, Vol.68, No.2, pp. 151-166, 2010, DOI:10.3970/cmes.2010.068.151

    Abstract CaF2 single crystal is used as high performance optical elements. We developed an analysis system for simulating birefringence of CaF2 single crystal used as a chamber window of a gas laser light source. The analysis system consists of a stress analysis and a birefringence analysis. In the stress analysis, the finite element method was applied to obtain the mechanical stress caused by a window holder and gas pressure. In the birefringence analysis, the photo-elastic effect gives the change of refractive indices, from which the optical path difference and the fast axis are calculated by using the More >

  • Open Access

    ARTICLE

    Physical Regulation of Human Mesenchymal Stem Cells through Altered Calcium Dynamics

    S. Sun1, S. Lipsky1, M. Cho1

    Molecular & Cellular Biomechanics, Vol.3, No.4, pp. 213-213, 2006, DOI:10.32604/mcb.2006.003.213

    Abstract This article has no abstract. More >

  • Open Access

    ARTICLE

    Intracellular Calcium Waves in Bone Cell Networks under Single Cell Nanoindentation

    X. Edward Guo∗,†,‡, Erica Takai∗,‡, Xingyu Jiang§, Qiaobing Xu§, George M. Whitesides§, James T. Yardley, Clark T. Hung*, Eugene M. Chow||, Thomas Hantschel∗∗, Kevin D. Costa

    Molecular & Cellular Biomechanics, Vol.3, No.3, pp. 95-108, 2006, DOI:10.3970/mcb.2006.003.095

    Abstract In this study, bone cells were successfully cultured into a micropatterned network with dimensions close to that of in vivo osteocyte networks using microcontact printing and self-assembled monolyers (SAMs). The optimal geometric parameters for the formation of these networks were determined in terms of circle diameters and line widths. Bone cells patterned in these networks were also able to form gap junctions with each other, shown by immunofluorescent staining for the gap junction protein connexin 43, as well as the transfer of gap-junction permeable calcein-AM dye. We have demonstrated for the first time, that the intracellular More >

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