Materials Literature
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Over the past decade, high-quality lanthanide doped upconverting nanoparticles (UCNPs) have been successfully synthesized with the rapid development of nanotechnology. Due to the unique electron configuration of lanthanide ions, there are rich energy level structures in the near-infrared, visible and ultraviolet spect…
According to a study of the European Commission, approximately one million hips are replaced by prostheses worldwide every year. The interaction of the human body with foreign materials that are subjected to alternating mechanical load in a highly corrosive environment still provides challenges. The main factors affec…
In this thesis we intended to prepare and characterize nanocomposites that were obtained from syloxane-polyether containing different amounts of clays, aiming to improve the controlled release properties of sodium diclophenac from these matrixes. The (3isocyanatepropyl)triethoxysilane (IsoTreos) was used as the inorga…
This paper deals with the development of a mathematical model for emulsion copolymerization of styrene and butyl acrylate carried out in the presence of n-dodecyl mercaptan as chain transfer agent (CTA). The model consisted of a system of differential algebraic equations in which the population balances are based on a…
A partir de 2002, grâce à l'introduction du concept de la Qualité par la Conception (en anglais Quality by Design : QbD) par l'agence américaine des produits alimentaires et médicamenteux, l'industrie pharmaceutique a intensifié les efforts et les investissements pour permettre une libération en temps réel des lots co…
Ce travail de thèse a permis le développement d'un procédé de traitement de l'eau par couplage plasma/catalyse. Les traitements plasma ont été réalisés dans deux réacteurs différents : un réacteur pointe/plan et un réacteur dynamique. Ces deux réacteurs autorisent un contrôle de l'atmosphère gazeuse du traitement. La…
Fil: Cian, Raúl Esteban. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas; Argentina.
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O câncer de mama constitui o segundo tipo de câncer mais frequente no mundo e o mais comum entre as mulheres, representando uma das principais causas de morte. O tamoxifeno é um fármaco antiestrogênico utilizado para o tratamento deste tipo de câncer desde 1971 e ainda é o mais utilizado nos casos de tumores mamários…
Gelo de spin é uma substância que não possui um único estado de mínima energia. Mesmo a temperaturas muito baixas, esses compostos apresentam uma entropia residual, assim como no gelo da água. O ordenamento magnético de um gelo de spin se assemelha a posição dos átomos de hidrogênio no gelo da água, dispostas em um te…
Polidiacetilenos são polímeros conjugados com grande potencial para utilização como sensores para alimentos por exibirem propriedades colorimétricas únicas. Entretanto, sistemas lácteos são matrizes complexas e constituintes presentes nestes alimentos podem interferir na transição colorimétrica desses sensores. O pres…
Neste trabalho foi realizada a caracterização de um poliuretano derivado de óleo vegetal para ser utilizado na confecção de dispositivos de assistência ventricular, DAVs. Esses dispositivos são muito importantes na área cardiovascular, pois, possuem a função de suprir a falha dos ventrículos direitos ou esquerdo do co…
In den vergangenen Jahren wurden stetig wachsende Produktionskapazitäten von Biokunststoffen aus nachwachsenden Rohstoffe nverzeichnet. Trotz großer Produktionskapazitäten und einem geeigneten Eigenschaftsprofil findet Stärke nur als hydrophile, mit Weichmachern verarbeitete thermoplastische Stärke (TPS) in Form von B…
Η ξήρανση τροφίμων είναι μια διεργασία απομάκρυνσης της περιεχόμενης υγρασίας που χρησιμοποιείται ως μέθοδος αποθήκευσης των τροφίμων. Στην παρούσα διπλωματική εργασία παρουσιάζονται τα αποτελέσματα της προτυποποίησης και της υπολογιστικής προσομοίωσης των φαινομένων διάχυσης κατά τη ξήρανση φρούτων. Συγκεκριμένα, μελ…
Gold nanoparticles (AuNPs) are currently being trialled for use in a range of medical applications, including as a contrast agent for imaging tumours and radiotherapy. AuNPs have been shown to have a preferential uptake into tumorous cells over normal cells in vivo. As a result AuNPs could act as dose enhancers in rad…
Abstract : Energetic materials are studied as isolated species to learn the kinetics and dynamics of their unimolecular behavior. The behavior of these species is then compared with that of very similar model systems in order to enable the synthesis of new materials that will be energetic by design. This must be the f…
La formacion de los peroxidos de uranilo (studtita y metastudtita) como producto de alteracion del combustible nuclear gastado, en un almacen, estara determinada por la generacion de productos radioliticos oxidantes como el H2O2. La precipitacion de studtita en la superficie del combustible podria tener un efecto prot…
Solid solution effects on the strength of the finest nanocrystalline grain\nsizes are studied with molecular dynamics simulations of different Cu-based\nalloys. We find evidence of both solid solution strengthening and softening,\nwith trends in strength controlled by how alloying affects the elastic modulus\nof the m…
Molecular dynamics simulations are used to investigate strain localization in\na model nanocrystalline metal. The atomic mechanisms of such catastrophic\nfailure are first studied for two grain sizes of interest. Detailed analysis\nshows that the formation of a strain path across the sample width is crucial,\nand can…
A previous method for directly calculating the spatial distribution of energy deposition into damage or ionization for ions implanted into solid targets is extended to account for the energy transport by recoiling target atoms. The new calculations extend the applicability of the method to lower incident ion energies.…