Search results for " biocompatible materials"

showing 6 items of 6 documents

Evaluation of the antibacterial power and biocompatibility of zinc oxide nanorods decorated graphene nanoplatelets: New perspectives for antibiodeter…

2017

Background Nanotechnologies are currently revolutionizing the world around us, improving the quality of our lives thanks to a multitude of applications in several areas including the environmental preservation, with the biodeterioration phenomenon representing one of the major concerns. Results In this study, an innovative nanomaterial consisting of graphene nanoplatelets decorated by zinc oxide nanorods (ZNGs) was tested for the ability to inhibit two different pathogens belonging to bacterial genera frequently associated with nosocomial infections as well as biodeterioration phenomenon: the Gram-positive Staphylococcus aureus and the Gram-negative Pseudomonas aeruginosa. A time- and dose-…

3003Staphylococcus aureuslcsh:Medical technologyBiocompatibilitylcsh:Biotechnologyharmful to the environmentBiomedical EngineeringPharmaceutical ScienceMedicine (miscellaneous)Overall; ZNGs represent a promising candidate for developing biocompatible materials that can be exploitable in antimicrobial applications without releasing toxic compounds; harmful to the environment; Bioengineering; Medicine (miscellaneous); Molecular Medicine; Biomedical Engineering; Applied Microbiology and Biotechnology; 3003Biocompatible MaterialsBioengineeringNanotechnology02 engineering and technology010402 general chemistry01 natural sciencesApplied Microbiology and BiotechnologyNanomaterialsExtracellular polymeric substancelcsh:TP248.13-248.65HumansZNGs represent a promising candidate for developing biocompatible materials that can be exploitable in antimicrobial applications without releasing toxic compoundNanotubesbiologyChemistryResearchBiofilm021001 nanoscience & nanotechnologybiology.organism_classificationAntimicrobialAnti-Bacterial Agents0104 chemical scienceslcsh:R855-855.5NanotoxicologyBiofilmsPseudomonas aeruginosaZNGs; biodeterioration; antimicrobial nanomaterialMolecular MedicineGraphiteNanorodOverallZinc Oxide0210 nano-technologyBacteria
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A New Prosthetic Implant for Inguinal Hernia Repair: Its Features in a Porcine Experimental Model

2011

Even after more than 100 years of inguinal hernia repair, the rate of complications and recurrence remains unacceptably high. In the last decades, few effective advances in surgical technique and materials have been made. The authors see them as minor adjustments in the shape and materials of the prosthetic implants. Still, the underlying genesis of inguinal hernia remains undefined. Based upon this, it seems the surgical repair of inguinal protrusions cannot be based upon the pathogenesis because the etiology to date has not been addressed. Most hernia repairs are performed with some degree of point fixation (sutures/tacks) to stop the mesh from migrating and creating high recurrence rates…

MaleSettore MED/18 - Chirurgia GeneraleTissue ScaffoldsHernia Inguinal Biocompatible materials Prostheses and implants Incorporation Guided tissue regeneration Tissue scaffoldingGuided Tissue RegenerationSwineAnimalsits features in a porcine experimental model [A new prosthetic implant for inguinal hernia repair]Hernia InguinalProstheses and ImplantsA new prosthetic implant for inguinal hernia repair: its features in a porcine experimental modelPolypropylenes
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Laser-Fabricated Fluorescent, Ligand-Free Silicon Nanoparticles: Scale-up, Biosafety, and 3D Live Imaging of Zebrafish under Development

2022

This work rationalizes the scalable synthesis of ultrasmall, ligand-free silicon nanomaterials via liquid-phase pulsed laser ablation process using picosecond pulses at ultraviolet wavelengths. Results showed that the irradiation time drives hydrodynamic NP size. Isolated, monodisperse Si-NPs are obtained at high yield (72%) using post-treatment process. The obtained Si-NPs have an average size of 10 nm (not aggregated) and display photoemission in the green spectral range. We directly characterized the ligand-free Si-NPs in a vertebrate animal (zebrafish) and assessed their toxicity during the development. In vivo assay revealed that Si-NPs are found inside in all the early life stages of …

Materials scienceSiliconBiomedical Engineeringchemistry.chemical_element02 engineering and technology010402 general chemistrymedicine.disease_cause01 natural sciencessemiconductors biocompatible materials imaging agents quantum dots nanofabrication laser ablation in liquid biological materials toxicology translocation blood barrier biological imaging fluorecence imaging optical materialslaw.inventionNanomaterialsBiomaterialslawmedicinebusiness.industryBiochemistry (medical)General Chemistry021001 nanoscience & nanotechnologyLaserFluorescence0104 chemical sciencesNanolithographychemistryPicosecondOptoelectronics0210 nano-technologybusinessBiological imagingUltravioletACS Applied Bio Materials
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Biologic response of inguinal hernia prosthetics: a comparative study of conventional static meshes versus 3D dynamic implants.

2015

Despite improvements in prosthetics and surgical techniques, the rate of complications following inguinal hernia repair remains high. Among these, discomfort and chronic pain have become a source of increasing concern among surgeons. Poor quality of tissue ingrowth, such as thin scar plates or shrinking scars-typical results with conventional static implants and plugs-may contribute to these adverse events. Recently, a new type of 3D dynamically responsive implant was introduced to the market. This device, designed to be placed fixation-free, seems to induce ingrowth of viable and structured tissue instead of regressive fibrotic scarring. To elucidate the differences in biologic response be…

Sampling StudieTime FactorsTime FactorProstheses and ImplantBiomedical EngineeringMedicine (miscellaneous)BioengineeringBiocompatible MaterialsHernia InguinalPolypropylenesProsthesis DesignSampling StudiesStatistics NonparametricImaging Three-DimensionalProstheseTensile StrengthMaterials TestingHumansHerniorrhaphyBiocompatible MaterialMedicine (all)Inguinal herniaImplantTissue scaffoldProstheses and ImplantsSurgical MeshBiomaterialImmunohistochemistryProsthesis FailureSettore MED/18 - Chirurgia GeneraleTissue regenerationBiomaterials; Herniorrhaphy; Implants; Inguinal hernia; Prostheses; Tissue regeneration; Tissue scaffolds; Biocompatible Materials; Hernia Inguinal; Herniorrhaphy; Humans; Imaging Three-Dimensional; Immunohistochemistry; Materials Testing; Polypropylenes; Prosthesis Design; Prosthesis Failure; Sampling Studies; Statistics Nonparametric; Tensile Strength; Time Factors; Prostheses and Implants; Surgical Mesh; Biomaterials; Biomedical Engineering; Bioengineering; Medicine (miscellaneous); Medicine (all)PolypropyleneHumanArtificial organs
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Integrazione di celle fotovoltaiche ibride nel vetromattone

2012

L’invenzione riguarda l’integrazione del vetromattone con celle solari ibride (organiche/inorganiche), conosciute come Dye-sensitized Solar Cell (DSC). La combinazione del vetromattone con le DSC consente di migliorare le prestazioni del prodotto originario rendendolo in grado di produrre energia pulita. Le caratteristiche di trasparenza e isolamento termo-acustico del prodotto possono essere regolate agendo sulla configurazione delle DSC. Il prodotto può essere assemblato a formare pannelli fotovoltaici per la realizzazione di facciate traslucide energeticamente “attive” in varie condizioni luminose (condizioni di luce diffusa o artificiale) e indipendentemente dall’angolo di radiazione so…

The integration of Dye-sensitized Solar Cell (DSC) with the glassblock is disclosed. The combination of the two technological elements the glassblock and the DSC module enhance their own peculiarities. The final complete product is ready-made for installation owns the qualities of the glassblock and produces sustainable energy at the same time. The transparency and the thermo-acoustic insulation may be modulated according to the specific requirements of each case of installation. The product may be used for example to create PV panels for glazed and translucent façades that are able to perform efficiently in all light conditions (even in diffuse light also converting internal artificial light) that are not dependant on the angle of the solar radiation and do not suffer from the high operative temperatures of functioning due to the peculiarities of the DSCs. DSCs are made of economic and biocompatible materials and are produced with low-cost and highly productive printing methods on rigid or flexible substrates. With the integration of DSC modules with the glassblock PV panels coincide with the envelope itself so that they do not need any further structures to be installed on and allow the possibility of subtract from the price of the panel the price of the substituted building element allowing further economies. DSCs can be printed in different colours and with various patterns offering to designers and customers the possibility of intervening on the glassblock aesthetical aspect also taking advantage of the peculiar modularity of the glassblock for larger compositions of drawings on the building’s façade. Seven Hypotheses of integration are discussed in order to obtain DSC-integrated glassblock ready for the construction of a precast and dry-assembled PV panel which can use the horizontal and vertical cavities between the glassblocks to house plastic profiles where the electric interconnections and the steel bars -useful for improve the mechanical resistance of the panel- are integrated.Settore ICAR/10 - Architettura Tecnica
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Maltose-conjugated chitosans induce macroscopic gelation of pectin solutions at neutral pH

2014

Injectable polymer scaffolds are particularly attractive for guided tissue growth and drug/cell delivery with minimally invasive intervention. In the present work, "all-polymeric" gelling systems based on pectins and water-soluble maltose-conjugated chitosans (CM) have been developed. Maltose-conjugated chitosan has been synthesized at three different molar ratios, as evaluated by FITR analysis and fluorimetric titration. A thorough rheological characterization of the blends and their parent solutions has been performed. Macroscopic gelation has been achieved by mixing the high esterification degree pectins with CM at higher maltose grafted to chitosan contents. Gels form in a few minutes a…

food.ingredientPolymers and PlasticsPectinmacromolecular substancesConjugated systemChitosanchemistry.chemical_compoundfoodRheologyTissue engineeringPolymer chemistryMaterials ChemistryMaltose-conjugated chitosan Hydrogels Pectin Biocompatible materials RheologyBiocompatible materialsMaltoseMaltose-conjugated chitosanChitosanTissue ScaffoldsOrganic Chemistrytechnology industry and agricultureHydrogelsMaltoseHydrogen-Ion ConcentrationPectinSettore FIS/07 - Fisica Applicata(Beni Culturali Ambientali Biol.e Medicin)SolutionschemistryChemical engineeringSelf-healing hydrogelsPectinsTitrationSettore CHIM/07 - Fondamenti Chimici Delle TecnologieRheologyGels
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