Search results for "Materiali"
showing 10 items of 876 documents
Physico-chemical and mechanical characterization of in-situ forming xyloglucan gels incorporating a growth factor to promote cartilage reconstruction
2016
Abstract The development of growth factors is very promising in the field of tissue regeneration but specifically designed formulations have to be developed in order to enable such new biological entities (NBEs). In particular, the range of therapeutic concentrations is usually very low compared to other active proteins and the confinement in the target site can be of crucial importance. In-situ forming scaffolds are very promising solutions for minimally invasive intervention in cartilage reconstruction and targeting of NBEs. In this work injectable, in-situ forming gels of a temperature responsive partially degalactosylated xyloglucan (Deg-XG) incorporating the growth factor FGF-18 are fo…
REUTILIZACIÓN DE RESIDUOS DE PODA DE VID Y DE POSIDONIA OCEANICA EN LAS OBRAS DE BIOINGENIERÍA DEL PAISAJE
La popolazione mondiale è in continua espansione e la crescita demografica ed economica inducono allo sfruttamento progressivo dell’ambiente ed al depauperamento delle risorse naturali (acqua ed energia in particolare), con conseguenti impatti potenzialmente importanti sul cambiamento globale. Si rende, pertanto, necessaria ed urgente una più efficiente gestione delle risorse basata sulla rielaborazione di obiettivi sostenibili di politiche e strategie ambientali e sulla riduzione del consumo delle risorse, promuovendo la transizione da un modello di economia lineare ad uno circolare, costituito da un ciclo continuo di sviluppo positivo che preserva e migliora il capitale naturale, ottimizz…
Indentation test as a tool for monitoring the solidification process during injection molding
2003
An inline method for monitoring the solidi-fication process during the injection molding of semicrystalline polymers is demonstrated. The method has been applied to various poly(ethylene terephthalate) (PET) and poly(buthylene terephthalate) (PBT) samples. The technique is based on a simple device by which an additional ejector pin is pushed onto the injection-molded part with a fixed force at different times during the solidification phase while the mold remains closed. The residual deformation (the so-called indentation depth) due to the applied load is measured offline after ejection. By the performance of indentation at different times during the cooling phase, an indentation depth prof…
INNOVAZIONE TECNOLOGICA DI SISTEMI, COMPONENTI E MATERIALI
2016
Il fabbisogno energetico di un edificio è la somma dell’energia necessaria per il riscaldamento, il raffrescamento, la ventilazione e l’illuminazione. La somma di tali consumi incide fortemente sul bilancio energetico nazionale e, alla riduzione di tale incidenza, sono dedicate numerose ricerche. Alcune di queste sono tese all’individuazione di nuove fonti energetiche rinnovabili, altre alla riduzione dei consumi attraverso l’efficientamento dell’involucro degli edifici e al miglioramento degli impianti. Tutte queste ricerche sono tese all’efficientamento del consumo energetico in fase d’uso degli edifici, l’energia che si va a misurare è dunque detta Operating energy. La progettazione di u…
Electrochemical oxidation of tetramethoxy precursor as a key step for the synthesis of coenzyme Q10
2007
The feasibility of electrosynthesis of coenzyme Q10 (1) by electrooxidation of tetramethoxy precursor (2) has been investigated at carbon, Pt and BDD anodes in a divided cell. The process strongly depends on the applied potential, anode material and water content of the solvent. At carbon anodes in CH3CN/CH2Cl2 + 0.15 M Bu4NBF4 at proper operative conditions high faradic efficiency (>60%) and excellent selectivity (95–97%) of the target product were obtained. Keywords: Electrosynthesis, Coenzyme Q10, Anodic oxidation
Pyrolysed cork-geopolymer composites: A novel and sustainable EMI shielding building material
2019
Abstract In this investigation, and for the first time, pyrolysed sustainable cork was used to produce waste-based geopolymer-cork composites with enhanced electromagnetic interference (EMI) shielding properties. The influence of the pyrolysed cork amount and the geopolymer porosity on the EMI shielding ability of the composites was studied. The maximum total shielding effectiveness (SET) values achieved by these novel building materials (−13.8 to −15.9 dB) are equal to any other reported geopolymer microwave (MW) absorbers over the X-band, despite containing much lower carbon content. In addition, our composites were produced using an industrial waste (biomass fly ash) as raw material and …
"""Fluidity and flexibility of """"belonging"""": Uses of the concept in contemporary research"""
2016
Studies framing “belonging” as a key focus and a central concept of research have increased significantly in the 2000s. This article explores the dimensions of belonging as a scholarly concept. The investigation is based on a qualitative content analysis of articles published in academic journals covering a large number of different disciplines. The article poses and answers the following research questions: How is belonging understood and used in contemporary research? What added value does the concept bring to scholarly discussions? In the analysis, five topoi of conceptualizing belonging – spatiality, intersectionality, multiplicity, materiality, and non-belonging – were identified. Afte…
Experimental and numerical evaluation of sandwich composite structures
2004
The main problem working with sandwich composite structures is their intrinsic anisotropy and non-homogeneity that does not allow their correct modelling. Nowadays the available data on mechanical properties of complex structures, necessary to allow a correct and reliable design, are not sufficient. The aim of the present work is to extend the knowledge of mechanical properties both on single components and on complete structures, focusing on the effects induced by different kind of skin arrangements (Kevlar, glass and carbon fibres). Compressive, shear and flexural tests were performed for a complete static mechanical characterisation of the sandwich structure both on each single component…
Involucri Edilizi Sostenibili. Impiego di materiali tecnologicamente avanzati per l’ottimizzazione energetica e l’incremento prestazionale degli elem…
2013
La ricerca della migliore esposizione dell’edificio, grazie alla quale minimizzare l’apporto solare sulle facciate; l’impiego di specifici elementi captanti; la scelta dei materiali più idonei -per caratteristiche e prestazioni- al contenimento dei consumi energetici, sono solo alcuni degli aspetti. che entrano in gioco nel progetto di un involucro edilizio e, più in generale, di una architettura sostenibile. L’involucro edilizio, tra tutti gli elementi (tecnici) che conformano l’edificio, è quello che maggiormente interagisce con le “condizioni al contorno” (siano esse climatiche, urbane, sociali, economiche, ecc); da queste, infatti, trae spesso ispirazione per la sua stessa messa in form…
Evaluation of innovative thermal insulation systems for a sustainable envelope
2017
La memoria presenta i risultati ottenuti su sistemi di isolamento termico per l’involucro edilizio. Si presentano i risultati ottenuti tramite simulazioni informatiche che hanno consentito di verificare e ottimizzare la trasmissione del calore attraverso un sistema sottovuoto in vetro per le facciate trasparenti. Inoltre la possibilità offerta dal riciclo del materiale di scarto della potatura dell’Opunthia Ficus Indica (fichi d’india) che,opportunamente trattato ha permesso di ottenere un materiale isolante (Brevetto n. 1402131), in forma di pannello o in grani sfusi, (valori di coibenza termica 0.0710.057 W/mK). The paper presents the results of the research on thermal insulation systems…