The perfect coherent absorption, observed for the first time 3 years ago in a silicon slab, has attracted a great interest in the scientific community because from a theoretical point of view it is the reverse of the laser: in fact it gives rise to a device that absorbs the light completely, contrary to the laser which generates it. In general the absorption of light by a material depends on its dielectric properties and increases in proportion to its thickness. However, when not one beam but ...

Spin control of single electrons is of great interest for future applications in electronics and spintronics. However, to observe these phenomena at room temperature it is necessary to confine the electrons to conductive islands with reduced size, almost atomic. Although this type of confinement is feasible today, the technological difficulty is to control independently the different conductive islands separated by a few nanometers. A goal almost prohibitive. Recently a group of researchers from ...

3D hybrid biomimetic and bio-resorbable scaffolds for the complete regeneration of multi-functional regions like osteochondral and periodontal sites are developed by a well-established bio-inspired synthesis mimicking the biologic neo-ossification process, thus providing the new devices with very high regenerative ability. The scaffolds are based on Type I collagen fibers that assemble, organize and mineralize with biomimetic, ion-substituted hydroxyapatite nano-nuclei upon pH variation at ...

The GiraffPlus project (http://www.giraffplus.eu/) is funded by the European Community within the Framework Programme Seven (FP7) and involves several european countries, research centres, companies and national health services. The scope of the project is promoting the indipendent living of the elderly who often live alone through a long-term monitoring of their activities inside their houses and the prevention of health problems or emergency situations that may arise. Moreover tools for ...

The regeneration of critical-size bone defects requires the implantation of porous scaffolds exchanging suitable chemical, morphological and mechanical signals with cells so as to activate new bone formation and colonization of the whole scaffold. Pore size and morphology must be designed to achieve cell penetration and the establishment of a suitable vascular network to sustain the bone metabolism. The mechanical strength of the scaffolds should be sufficient for early physical stabilization ...

The regeneration of hard connective tissues (e.g. bone, teeth) is activated by the presence of specific chemical and morphological signals inducing new bone formation and organization. In this respect hydroxyapatite phases presenting bone-like composition (i.e. multiple ionic substitutions such as Mg2+, CO32-, Na+, K+, SiO44-, Sr2+), nanosized microstructure and low crystal order can be synthesized by wet methods at room temperature. These new phases closely mimic the inorganic part of bone and ...

The development of hydraulic mortars by using as binder slaked lime, historic material, and natural hydraulic lime, that, at the present time, is the most lime typology used in the restoration and building fields. Metakaolin is obtained by calcinating at 650°C a commercial kaolin and it is used as pozzolanic admixture. Our study is focalised on the realisation of: 1) injection mortars for consolidation or re-adhesion systems previously disconnected or detached; 2)structural mortars that ...

Presentazione del libro Laura Ambrosini - Vincent Jolivet (sous la direction de), Les potiers d'Étrurie et leur monde : contacts, échanges, transferts. Hommages à Mario A. Del Chiaro, Paris 2014, che si svolgerà a Roma, giovedi 5 giugno alle ore 16 presso l'Aula Marconi del CNR, Piazzale Aldo Moro 7.

The joint efforts of Italian researchers, among which ISN-CNR researchers and American researchers from National Institute of Aging (NIA), NIH, Bethesda allowed the identification of a new gene ALS-related, Matrin 3 on Chromosome 5. MATR3 is an RNA- and DNA-binding protein that interacts with TDP-43, a disease protein linked to amyotrophic lateral sclerosis (ALS) and frontotemporal dementia. The work is published on Nature Neuroscience. Mutations in the Matrin 3 gene cause familial amyotrophic ...

In the restoration works, the use of products compatible with the materials composing the heritage artworks is important. The majority of materials of Cultural heritage (ceramics, mosaics, mortars, stones) is made of natural inorganic raw materials, so it is crucial in the conservative intervention to use inorganic non-metallic compounds, that in some cases are the same components of the cultural heritage. For this reasons, we are setting up products gotten by modification of inorganic raw ...

Approda a Roma, al Palazzo delle Esposizioni, la grande mostra archeologica "Gli Etruschi e il Mediterraneo. La città di Cerveteri", già allestita al Louvre-Lens con grande successo di pubblico e critica. Organizzata in partenariato dall'Azienda Speciale Palaexpo e dal Louvre-Lens, la mostra è stata curata dal CNR-ISMA, dal Louvre e dalla Soprintendenza per i Beni archeologici dell'Etruria meridionale. Un'ampia selezione di temi e oggetti (oltre 450) illustrano la nascita e lo sviluppo fino ...

Joining techniques permit to build complex and potentially multimaterial structures that cannot be obtained directly with the densification process. Bonding is necessary to fully exploit the potential of several hi-tech ceramics.

Hybrid porous nano-composites to be used as filtering devices and moisture exchange systems are developed with complex geometry contributing to the water and nano-particles trapping (including the unrestrainable particle with dimensions in the range of 30-100 nm) without excessive pressure drop. The hybrid composites are developed through a biomineralization process induced starting from a suspension of blended natural polymers (e.g. gelatine, chitosan, alginate) in the presence of Ca2+ and ...

Collagen based complex polymeric matrixes are prepared to be used for soft tissue regeneration such as heart, tendons/ligaments, meniscus and endocrine organs (thymus, thyroid gland). Biologically inspired processes of pH induced self-assembling and self-organization are applied to various polymeric blends of natural and/or bio-erodible polymers (collagen, cellulose, alginate, chitosan, PLLA, PCL, PGA PEG) to obtain 2-D and 3-D construct with high affinity with soft tissues. Collagen based ...

Smart cities are nowadays subject of many innovation projects, as well as on the political agenda of many (local) governments. Often, in the design of smart services, and discussions in this regard, the emphasis is mainly on the importance of data collection and of communications, particularly with respect to the Internet of things. Less attention is instead directed to the necessary interactions between the various parts (humans, things, programs, communications systems, etc..) and to the need ...

The ultra-high temperature ceramics (UHTCs) draw the interest of the materials engineering to designe thermal protection structures and control surfaces for the sharp leading edge technology. Sharp leading edges for reentry vehicles or hypersonic space-crafts are two leading examples. Thhank to this new concept, improved flight performances together with enhanced safety for the crew, larger cross-range, wider launch windows, and safer landing for aborted flight plans can be achieved. Ceramic ...

A heat pipe is a heat transfer device that can exchange large quantities of heat with a very small difference in temperature between the hot and cold interfaces by means of evaporation and condensation of a working fluid. The evaporator is the heart of the device and it contains capillary-porous structures generally based on metals or organic polymers. A possibility to increase the capacity of thermal exchange is through the replacement of conventional materials with ceramic like materials such ...

L'attività è dedicata allo sviluppo di impianti porosi con struttura gerarchicamente organizzata in grado di mimare le caratteristiche morfologico-strutturali dell'osso e di esibire adeguate proprietà biomeccaniche. Recenti studi avanzati indirizzati allo sviluppo di strutture porose consistono nell'applicazione di processi di trasformazione morfo-sintetica di templanti naturali, con cui si possono ottenere impianti ossei a base calcio-fosfatica con proprietà rigenerative, che riproducono in ...

Bioactive hydroxyapatite nano-phases endowed with intrinsic superparamagnetism, designed to act as new stimuli-responsive drug delivery systems or to enhance cell homing and colonization of bone and osteochondral scaffolds thus enhancing tissue regeneration. The recent development of new intrinsically superparamagnetic hydroxyapatite nanoparticles (Fe-HA) was achieved through controlled substitution of Ca2+ ions with Fe2+/3+ ions, with specific Fe/Ca and Fe2+/Fe3+ ratios. Due to the bioactivity, ...

Hydroxyapatite (HA: Ca10(PO4)6(OH)2) is a widely used biomaterial for the repair and regeneration of bone defects; however HA is also recognized as a very interesting material for environmental purification due to its ability to easily absorb a number of inorganic compounds as well as different organic substances such as proteins and bacteria. In this respect, specific ion substitutions in the lattice of HA can enable specific functionality so to open the way to multi-functional and ...

La mostra è il risultato di una collaborazione internazionale che vede coinvolti il Louvre, l'ISMA-CNR e la Soprintendenza per i Beni archeologici dell'Etruria meridionale. Oltre 450 oggetti prestati da Musei di tutto il mondo e provenienti da Cerveteri, l'antica Caere, saranno esposti nella "Sister Gallery" del Louvre a Lens, nella regione del Nord-Pas-de-Calais e permetteranno per la prima volta di ripercorrere circa dieci secoli di storia che videro la città etrusca fra le metropoli più ...

Wool-geopolymer composite pots were produced as an alternative to commonly used peat ones. Already grown plants and seeds were studied over a period of 6 weeks. First results outlined that wool-geopolymer pots promote the earlier growth of seeds comparing to the reference ones. The alkaline environment of the geopolymer is indeed able to partially degrade the keratin structure of the wool (but preserving the fibers' nature), making most nutrients readily available for the sprouts. Moreover, the ...

The introduction of inorganic natural or artificial pigments permit to obtain colored geopolymers can be used in the restoartion field. The mechanical and physical characteristics are able to use the obtained products for realising musive tesserae. At the present, briquettes of different colors are realised. the obtained tesseare can also be used to realise modern mosaics as altenartive solutions to resin tesserae.

CNR, Aula Marconi, 5 novembre 2013, ore 9,30-13,00 L'evento è dedicato alla presentazione del "Gruppo di Ricerca Interdisciplinare di Storia degli Studi Orientali" (GRISSO), iniziativa permanente nata nel 2013 all'interno dell'Istituto di Studi sul Mediterraneo Antico (ISMA). Coordinato da Silvia Alaura, GRISSO si propone come centro di aggregazione e promozione di ricerca e come luogo di discussione e formazione. Ne fanno parte professori e ricercatori di istituti, centri di ricerca e ...

The ESA's GOCE satellite was launched on 17 March 2009. It had a dry mass of 1002 kg and a roughly cylindrical shape of 1 m diameter and 5.3 m length, with wing-shaped fins spanning 2 m. After mapping the geopotential with unrivalled accuracy and detail for four years from an extremely low circular polar orbit, on 21 October 2013 the low thrust ion propulsion motor used to contrast the atmospheric drag was automatically shut down when the pressure in the xenon propellant tank dropped below a ...

Da novembre 2013 è online il sito web "LiBER | Linear B Electronic Resources". Il progetto LiBER, nato presso l'Istituto di Studi sul Mediterraneo Antico (ISMA) e sviluppato da Maurizio Del Freo e Francesco Di Filippo, si propone di realizzare un'edizione elettronica aggiornata dei testi in lineare B interrogabile online attraverso un motore di ricerca specificamente progettato per il trattamento delle scritture logo-sillabiche. La base di dati contiene le trascrizioni dei testi con le relative ...

Nanobrain is part of the flagship project NanoMax and originates from the collaboration between four CNR Institutes: Nanoscienze (Nano), Neuroscienze (IN), Officina dei Materiali (IOM) and Istituto Nazionale di Ottica (INO). This project promotes the collaboration between the neuroscience and the nanofabrication technologies present in CNR. At the basis of this project is the consideration that the brain is biochemically isolated from the body by the Blood Brain Barrier (BBB): because of this ...

The focus of the Istitute of Nanoscence is on graphene with the ambitious of developing research activities that have the potential to bring this material and related nanostructures from a state of raw potential to a point where they can revolutionize multiple industries - from flexible, transparent electronics, to energy and high performance computing and spintronics. Our current efforts are on the growth of epitaxial graphene and its chemical functionalization for energy applications. Other ...

Researchers at IMEM-CNR have created a composite nanostructure made of zinc oxide (ZnO) tetrapod-shaped crystals and nanometric magnetite (Fe3O4) nanoparticles with super-paramagnetic properties, i.e. thanks to their small size they behaves like a ferromagnetic material only when an external magnetic field is applied. In the obtained composite nano-material several useful properties are contemporary present and combined together in a single multifunctional structure. By means of the proper ...

La produzione di energia ecosostenibile richiede il miglioramento delle prestazioni e la riduzione dell'impatto sull'ambiente e sul clima dei processi utilizzati. L'Istituto di Ricerche sulla Combustione (IRC) del CNR di Napoli, capofila d'importanti progetti finanziati dalla Ricerca di Sistema Elettrico del MiSE e del progetto FECUNDUS finanziato dalla Commissione Europea, svolge da tempo attività di studio sui processi tecnologicamente avanzati per la cattura della CO2(CCS). Le attività di ...