Materials Literature
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Depuis plusieurs années, les nanotechnologies sont en plein développement. Cependant, le terme « nanosciences » serait plus approprié car peu d'applications industrielles ont été réellement développées à ce jour. Le changement d'échelle nécessaire pour mettre au point des nanodispositifs a abouti à une nouvelle approc…
Cet article est dédié aux voies de stabilisation destinées à ralentir les phénomènes de vieillissement des polymères. Deux méthodes de stabilisation sont présentées ; celle agissant contre le vieillissement anaérobie (UV, hydrolyse) et celle agissant contre l'oxydation. Les principaux mécanismes chimiques mis en jeu s…
L'emploi d'émulsions concentrées comme génératrices de matériaux polymères microcellulaires à cellules ouvertes représente une alternative attractive aux méthodes traditionnelles de moussage. Les matériaux ainsi obtenus, connus sous l'acronyme de polyHIPE, font l'objet d'un vif intérêt de la part des chercheurs académ…
Les élastomères thermoplastiques (TPE) ont envahi l’industrie, leur taux de croissance est supérieur à ceux des thermoplastiques et des caoutchoucs. Leurs spécificités combinant facilité de mise en œuvre des thermoplastiques et élasticité de leur phase souple comblent, en partie, le fossé entre thermoplastiques tradit…
We study the transmission response of microwaves through two identical metallic plates perforated with periodical ultranarrow slits. The experimental and numerical transmission spectra consistently display a striking transmission peak at wavelength much larger than any characteristic length of the microstructure (e.g.…
The development of large, single grain bulk superconductors by melt processing techniques has generated a need to characterize samples magnetically over large dimensions, exceeding typically 20 mm in diameter. The usual magnetic characterization gives relies on miniature Hall probe mapping and gives information about…
We have recently shown that an adenovirus carrying REIC/Dkk-3 (Ad-REIC) exhibits a potent tumor-specific cell-killing function for various human cancers. It has also become evident that some human cancers are resistant to Ad-REIC-induced apoptosis. The aim of the present study was to determine the molecular mechanisms…
The United States Department of Energy’s Next Generation Nuclear Plant (NGNP) Program will be irradiating six nuclear graphite creep experiments in the Advanced Test Reactor (ATR) located at the Idaho National Laboratory (INL). The graphite experiments will be irradiated over the next six to eight years to support dev…
This study was conducted to reveal the conditions and parameters which control dissolution and release of indogentic potassium in some Hammam Al-Alil soils northern Iraq, representing Aridisols order. Three pedons were selected having different soil series namely (462CCE, 453CCW and 451CCW). The study included using s…
Στην παρούσα εργασία μελετήθηκαν ημι-αλληλοδιαπλεκόμενα πολυμερικά δίκτυα (semi-IPNs) που βασίζονται στην σύνθεση πολυουρεθάνης (PU), σε μορφή πλέγματος, μέσα στο οποίο παρεμβάλλονται αλυσίδες πολυ(υδροξυαιθυλικού μεθακρυλεστέρα) (ΡΗΕΜΑ) σε ποσοστό 17% καθώς και νανοσωματίδια πυριτίας. Επιφανειακώς τροποποιημένα ανόργ…
HTR is a high temperature reactor used for electricity production and process heat applications such as hydrogen production, desalination of sea water, enhanced oil recovery and so on. HTR is designed based on the utilization of TRISO fuel particles that can prevent strongly the escape of fission products even at temp…
editorial reviewed
El recubrimiento metálico de zinc aleado con otros metales como el níquel, tiene muy buena resistencia contra la corrosión. Se encontró que el tipo y la cantidad de partículas, aumentan la dureza y el contenido de níquel en la aleación. Se hicieron fotomicrografías en microscopio electrónico y óptico (en muestras vist…
Photovoltaic effect in isotype heterotructure formed by nanocrystalline silicon carbide films on single crystal n-Si substrates (n-SiC/n-Si heterojunction) was studied. The films were produced by direct ionic deposition method. The model that takes into account the quantum wells and potential barriers caused by band o…
A substantial amount of waste products of heat-and-power engineering has been accumulated\nin Russian Federation up to the present time. The waste products include ash and other waste\nmaterials. Their utilization is of particular significance in road building because this sector\ndemonstrates a high consumption rate…
Nowadays, some of the material challenges arise from a performance point of view as well as from recycling and biodegradability. Concerning these aspects, the development of polymer layered silicate nanocomposites can provide possible solutions. This study investigates how to obtain polymer layered silicate nanocompos…
Abstract : This is a joint project by two Innovator Awardees and a Scholar to develop a novel nanotechnology platform for the diagnosis and treatment of breast cancer. The prevalence of breast cancer and the large number of deaths from this disease underscore the need for a paradigm shift in the strategies towards dev…
International audience
Fouling deposit phenomena are common in industrial heat exchangers. It can accumulate during heat treatment and cooling process. The objectives of this work were to investigate the characteristics of pink guava puree (PGP) fouling deposit and to predict the effect of fouling deposit on tubular heat exchanger. The simi…
Graphene is the ultimately thin membrane composed of carbon atoms, for which future possibilities vary from desalinating sea water to fast electronics. When studying the properties of this material, molecular dynamics has proven to be a reliable way to simulate the effects of ion irradiation of graphene. As ion beam i…