1,197 research outputs found
Dataset supplementing the publication "Spaeth K., Nawaz Q., Schilling T., Goetz-Neunhoeffer F., Detsch R., Boccaccini A. R., Hurle K. - New Insights into application relevant properties of Cu2 - doped brushite cements"
No full textCollectivity of all measured data mentioned in the article “Spaeth, K., Nawaz Q., Schilling T., Goetz-Neunhoeffer F., Detsch R., Boccaccini A. R., Hurle K. - New Insights into application relevant properties of Cu2+- doped brushite cements". Listed are raw data of the following methods: Antibacterial tests (Hemmhof tests), compressive strength measurements, cytotoxicity tests (cell viability by optical density and fluorescence microscopy images), injectability measurements, ionic release by inductively coupled plasma - mass spectrometry, pH measurements, scanning electron microscopy images, setting time measurements and powder X-ray diffraction. Some results are only presented in german
45S5 Bioglass®-derived scaffolds coated with organic–inorganic hybrids containing graphene
No full textHighly porous 45S5 Bioglass®-based scaffolds fabricated by a foam replication technique were coated with electrically conductive organic-inorganic hybrid layers containing graphene by a solution method. α,ω- Triethoxysilane terminated poly (ethylene glycol) and tetraethoxysilane were used as the precursors of the organic-inorganic hybrid coatings, that contained 1.5 wt.% of homogeneously dispersed graphene nanoplatelets. The resulting coated scaffolds retained their original high porosity and interconnected pore structure after coating. The presence of graphene did not impair the bioactivity of the scaffolds in simulated body fluid. Initial tests carried out using MG-63 cells demonstrated that both uncoated scaffolds and scaffolds coated with organic/inorganic hybrids containing graphene offered the cultured cells an adequate surface for cell attachment, spreading and expression of extracellular matrix. The results showed that scaffolds coated with graphene are biocompatible and they can support cellular activity. The electrical conductivity introduced by the coating might have the potential to increase tissue growth when cell culture is carried out under an applied electric field
Highly Porous Polymer-Derived Bioceramics Based on a Complex Hardystonite Solid Solution
No full textHighly porous bioceramics, based on a complex hardystonite solid solution, were developed from silicone resins and micro-sized oxide fillers fired in air at 950 °C. Besides CaO, SrO, MgO, and ZnO precursors, and the commercial embedded silicone resins, calcium borate was essential in providing the liquid phase upon firing and favouring the formation of an unprecedented hardystonite solid solution, corresponding to the formula (Ca0.70Sr0.30)2(Zn0.72Mg0.15Si0.13) (Si0.85B0.15)2O7. Silicone-filler mixtures could be used in the form of thick pastes for direct ink writing of reticulated scaffolds or for direct foaming. The latter shaping option benefited from the use of hydrated calcium borate, which underwent dehydration, with water vapour release, at a low temperature (420 °C). Both scaffolds and foams confirmed the already-obtained phase assemblage, after firing, and exhibited remarkable strength-to-density ratios. Finally, preliminary cell tests excluded any cytotoxicity that could be derived from the formation of a boro-silicate glassy phase
Degradable magnesium implants: improving bioactive and antibacterial performance by designed hybrid coatings
No full textMagnesium and its alloys are promising material candidates for degradable fracture fxation devices due to their suitable mechanical properties and biocompatibility; however, their fast corrosion in aqueous media causes pain and swelling. In this study, a hybrid coating system composed by a sol–gel silica-based matrix with bioactive glass microparticles and silica–gentamicin nanoparticles was deposited by spray technology on magnesium AZ91D alloy. The coating was homogeneously distributed on the surface and protected the degradation of AZ91D alloy in simulated body fuid for at least 28 days, preventing the pH increase of the solution and accelerating the formation of calcium phosphate-related compounds on the surface. Moreover, inhibition of bacteria growth was proved for Staphylococcus aureus and Escherichia coli and increased cell adhesion and proliferation of ST-2 and diferentiated MC3T3-E1 cells was shown. The generated coating is a promising surface treatment for providing bioactive and antibacterial proprieties to new degradable implants.Fil: Merlo, Julieta. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; ArgentinaFil: Detsch, Rainer. Universitat Erlangen-Nuremberg; AlemaniaFil: Ceré, Silvia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; ArgentinaFil: Boccaccini, Aldo R.. Universitat Erlangen-Nuremberg; AlemaniaFil: Ballarre, Josefina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentin
Studies on Cell Compatibility, Antibacterial Behavior, and Zeta Potential of Ag-Containing Polydopamine-Coated Bioactive Glass-Ceramic
No full textDopamine is a small molecule that mimics the adhesive component (L-DOPA) of marine mussels with a catecholamine structure. Dopamine can spontaneously polymerize to form polydopamine (PDA) in a mild basic environment. PDA binds, in principle, to all types of surfaces and offers a platform for post-modification of surfaces. In this work, a novel Ag-containing polydopamine coating has been developed for the functionalization of bioactive glass-ceramics. In order to study the interactions between the surface of uncoated and coated samples and the environment, we have measured the surface zeta potential. Results confirmed that PDA can interact with the substrate through different chemical groups. A strongly negative surface zeta potential was measured, which is desirable for biocompatibility. The dual function of the material, namely the capability to exhibit bioactive behavior while being antibacterial and not harmful to mammalian cells, was assessed. The biocompatibility of the samples with MG-63 (osteoblast-like) cells was determined, as well as the antibacterial behavior against Gram-positive Staphylococcus carnosus and Gram-negative Escherichia coli bacteria. During cell biology tests, uncoated and PDA-coated samples showed biocompatibility, while cell viability on Ag-containing PDA-coated samples was reduced. On the other hand, antibacterial tests confirmed the strong antimicrobial properties of Ag-containing PDA-coated samples, although tailoring of the silver release will be necessary to modulate the dual effect of PDA and silver
Coat Cooke & Joe Poole | Coat Cooke & Rainer Wiens: Reviews
No full textCoat Cooke album reviews by Randy Raine-Reusch. Coat Cooke (sax); Joe Poole (drums); Rainer Wiens (guitar)
Robert Rainer and Claud Garner
No full textAuthor Claud Garner, right, autographed copies of his second novel while discussing a tour of other Southwest cities with Robert Rainer, representing his publisher, Creative Age Press. Published in the Fort Worth Star - Telegram morning edition, September 29, 1950.https://mavmatrix.uta.edu/specialcollections_startelegram1950s/6596/thumbnail.jp
Quantum chemistry of 2D-nanomaterials : investigation of graphene, hBN and α-borophene on SiO2 (001)
No full textAuthor: Felix Rainer Serafin Purtscher, BScMasterarbeit University of Innsbruck 202
Quantum chemistry of 2D-nanomaterials : investigation of graphene, hBN and α-borophene on SiO2 (001)
No full textAuthor: Felix Rainer Serafin Purtscher, BScMasterarbeit University of Innsbruck 202
Magnetic Glass Ceramics by Sintering of Borosilicate Glass and Inorganic Waste
No full textCeramics and glass ceramics based on industrial waste have been widely recognized as competitive products for building applications; however, there is a great potential for such materials with novel functionalities. In this paper, we discuss the development of magnetic sintered glass ceramics based on two iron-rich slags, coming from non-ferrous metallurgy and recycled borosilicate glass. The substantial viscous flow of the glass led to dense products for rapid treatments at relatively low temperatures (900-1000 °C), whereas glass/slag interactions resulted in the formation of magnetite crystals, providing ferrimagnetism. Such behavior could be exploited for applying the obtained glass ceramics as induction heating plates, according to preliminary tests (showing the rapid heating of selected samples, even above 200 °C). The chemical durability and safety of the obtained glass ceramics were assessed by both leaching tests and cytotoxicity tests
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