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R. Major, J. Lackner, P. Wilczek, M. Sanak, B. Jakieła, B. Stolarzewicz, M. Kowalczuk, M. Sobota, K. Maksymow, M. Spisak and B. Major

Functional cardio-biomaterials

Titanium as well as carbon based biomaterials, seem to be good candidates for future blood-contact applications. Bio-materials such as: Ti, Ti+DLC, TiN; Ti(C, N) with higher carbon concentration and DLC (diamond like carbon) were under examinations. Trials on surface modification of PU (polyurethane) substrate using ion mill were performed. Materials were deposited as thin films by the hybrid pulsed laser deposition (PLD) technique to examine the influence of the fabricated surfaces on cell behavior. The metallic titanium as a target was used for titanium based-film and graphite one for DLC. Phase content of deposited films was controlled by the flowing gas mixture of Ar+N2 and Ar+N2+C2H2 type in the reactive chamber. Sputtering of graphite was carried out in Ar atmosphere. The kinetic energy of the evaporated particles was controlled by application of variation of different reactive and non reactive atmospheres during deposition. Transmission electron microscopy (TEM) was used to reveal structure dependence on specific atmosphere in the reactive chamber. The measurement of the strength of bonds between biomaterials and cells is a major challenge in cellular biology since it allows for the identification of different species in adhesion phenomena. The biomaterial examinations were performed in static conditions with Dictyostelium discoideum cells and then subjected to a dynamical test to observe the cell detachment kinetics. For a given cell, detachment occurs for critical stress values caused by the applied hydrodynamic pressure above a threshold which depends on cell size and physicochemical properties of the substrate, but it is not affected by depolymerization of the actin and tubulin cytoskeleton. Tests revealed differences in behavior in respect to the applied coating material. The strongest cell-biomaterial interaction was observed for the carbon-based materials compared to the titanium and titanium nitride.

A surface fuctionalization was realized by: (i) fabrication of migration channels by laser ablation, (ii) electrospinning and (iii) deposition of multilayer film from polyelectrolites. A goal of the performed research was formation of scaffolds for bio-mimetic coatings. Surface morphology examinations and biomedical studies on porous and semi-porous materials with application of human endothelial cells HUVEC line were performed by application of confocal laser scanning microscopy (CLSM).

Open access

T.V. Bgasheva, E.A. Ahmetshin and E.V. Zharikov

color zoning by internal migration and formation of color centers. Contributions to Gemology, 11 (2002), 1-48. 16. Emmett J.L., Scarratt K., McClure S.F. et al.: Beryllium diffusion of ruby and sapphire. Gems&Gemology, 39 (2003), 84-135. 17. Bgasheva T.V., Akhmetshin E.A., Zharikov E.V.: Enhancement of colour characteristics of fancy sapphires by heat treatment in reducing condition. Proceedings of 30th International Gemmological Conference, Moscow, 2007, 23-24. 18. Марфунин А.С.: Введение в физику минералов. Недра

Open access

Peter Dineff, Dilyana Gospodinova and Iva Avramov

flammability of treated wood. Meeting of working group COST Action E37: Sustainability through new technologies for enhanced wood durability, Hamburg, Germany, 08.÷09.11.2004. G. Troughton, and S. Chow. Migration of fatty acids to white spruce veneer surface during drying: Relevance to theories of inactivation. Wood Science, 1971, 3 (3): 129÷133; W. Hillis High temperature and chemical effects on wood stability. Wood Science and Technology, 1984, 18: 281÷293 Marra. Technology of wood bonding

Open access

B. Karpiński and M. Szkodo

. 33. Stadler P.J.: Influence of crystallographic habit and aggregate structure of authigenic clay minerals on sandstone permeability, Geologic Mijnbouw 53, 1973, 217-220. 34. Sommer F. (1975). Histoire diagtn&ique d'une strie grtseuse de Mer du Nord. Datation de l'introduction des hydrocarbures. Revue lnst. fr. Pdtrole 30, 729-740. 35. Hancock N.J. & Taylor A.M.: Clay mineral diagenesis and oil migration in the Middle Jurassic Brent Sand Formation, J. Geol. Soc. Lond. 135, 1978, 69-72. 36. Goven N., Howe W.F. & Davms D

Open access

Z. Ławrynowicz

), 1263-1265. 29. Trivedi R., Pound G.M.: The Effect of Concentration-Dependent Diffusion Coefficient on the Migration of Interphase Boundaries. J. Applied Physics 38 (1967), 3569-3576.

Open access

D. L. Alontseva, M. B. Abilev, A. M. Zhilkashinova, S. G. Voinarovych, O. N. Kyslytsia, E. Ghassemieh, A. Russakova and L. Łatka

Applications, R. Pignatello [ed.], InTech, London, UK, 2013, pp. 23-50. 5. Rahbek O., Overgaard S., Lind M., Bendix K., Bunger C., Soballe K.: Sealing effect of hydroxyapatite coating on peri-implant migration of particles. An experimental study in dogs. J Bone Joint Surg Br. [ed.], 2001, 83, 441–7. 6. Geesink RG.: Osteoconductive coatings for total joint arthroplasty. Clin Orthop Relat Res. [ed.], 2002, 395, 53–65. 7. Waheed S., Sultan M., Jamil T., Hussain T.: Comparative analysis of hydroxyapatite synthesized by sol-gel, ultrasonication and microwave

Open access

K. Dawidowska

-dimensional imaging of the aortic valve and aortic root with computed tomography: New standards in an era of transcatheter valve repair/implantation. Eur. Heart J. 30 (2009) 2079-2086. 12. Dwyer H. A., Matthews P. B., Azadani A., Ge L., Guy T. S., Tseng E. E. Migration forces of transcatheter aortic valves in patients with noncalcific aortic insufficiency. J. Thorac. Cardiovasc. Surg. 138 (2009) 1227-1233. 13. Totaro P., Morganti S., Ngo Yon C. L., Dore R., Conti M., Auricchio F., Vigano M., Computational finite element analyses to optimize graft sizing during aortic

Open access

Nusrat Jahan, Faruque-uz-Zaman Chowdhury and A.K.M Zakaria

happens. It can also be explained by the migration of cations. The linear variation of lattice parameters with Cr concentration confirms the applicability of Vegard’s law. Figure 2 Variation of lattice parameters with the concentration of Cr for the NiCr x Fe 2−x O 4 system sintered at 1350 °C. The X-ray density (ρ x = 8 M/Na 3 , where M is the molecular weight of the corresponding composition and N is Avogadro’s number) and the bulk density (ρ b = m/V, where V = a 3 is the volume of the cubic unit cell) were calculated using the lattice parameter “a

Open access

K. Anand, B. Ramamurthy, V. Veeraiah and K. Vijaya Babu

the direction of the field, resulting in larger values of ε′ of the samples. As the frequency increases further, the dipoles in the sample cannot reorient themselves fast enough to respond to the applied electric field, resulting in the decrease in ε′ of the samples and becoming almost constant [ 34 , 35 ]. 2.7 Dielectric permittivity (ε″) and dielectric loss (tanδ) The dielectric loss can be divided into three parts: conduction losses, dipole losses and vibrational losses. The loss that is attributed to conduction presumably involves the migration of

Open access

A. Senthil Kumar, R. Balaji, P. Puviarasu and S. Jayakumar

enhances the mixed ionic conduction (H + , O 2− ) at low operating temperatures. So, the BCG phase will have high ionic conductivity due to the fast migration of oxide ions through BCG phase at lower operating temperatures ( Fig. 1a ) and also due to creation of increased number of oxygen vacancies at intermediate temperatures [ 7 , 8 ]. In the present research work, gadolinium doped barium cerate electrolyte has been prepared by wet chemical method. The main advantage of chemical route is the possibility to achieve BCG nanoparticles with required orthorhombic