Materials Literature
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Power Quality is defined as “any occurrence manifested in current, voltage, or frequency deviations that results in damage, upset or failure of end-use equipment’s. It is common experience that electric power of poor quality has detrimental effects on health of different equipment and systems. The voltage at the equip…
La conservacion de microorganismos viables tiene interes en diversos sectores industriales. Asi, por ejemplo en la industria alimentaria, la panificacion, vinicultura y cerveceria entre otros requieren procesos de fermentacion que son iniciados con starters o microorganismos colonizadores requeridos para la generacion…
El projecte que es presenta en aquest document recull l’analisi del sistema de suspensio de un Lotus 7 i el posterior estudi cinematic i dinamic per tal de dissenyar un sistema de suspensio que millori les prestacions del vehicle en competicio. Es realitzara un estudi dels diferents tipus de suspensio existents aixi c…
Pellicle is defined as a thin transparent film stretched over an aluminum (Al) frame that is glued on one side of a photomask. As semiconductor devices are pursuing higher levels of integration and higher resolution patterns, the cleaning of the Al flame surface is becoming a critical step because the contaminants on…
Coffee ground waste is a residue from soluble coffee production, representing about 48% of raw material quantity used in the process. The high quantities cause environmental problems in the industries. A lot of studies have being conducted to aggregate value to this residue, but they are not applied from industries. T…
The ion-based superconductor [Formula: see text] has received much attention because this rare earth oxypnictide belongs to a new class [Formula: see text] of high-[Formula: see text] superconductors with critical temperatures surpassed by high-[Formula: see text] copper oxides. Since the [Formula: see text] is situat…
OBJECTIVE: To review the research progress of tissue engineered scaffolds and stromal-derived factor 1 (SDF-1) composite graft. METHODS: The recent papers about SDF-1 with different kinds of tissue engineered scaffolds were reviewed and analyzed. The primary mechanism of SDF-1 homing function for stem cells was retros…
La tenacidad a fractura (KIC) es un parametro determinante en el comportamiento mecanico de materiales fragiles y se define como la resistencia de un solido a la propagacion de grietas en su interior. Generalmente, en su determinacion se emplea la mecanica de fractura elastica lineal (LEFM), que se basa en la suposici…
We demonstrate a novel type of mirror, which reflects one circular polarization without reversing its handedness, while being a perfect absorber for the other circular polarization. This ultimate 2D-chiral effect enables circularly polarized cavities and lasers as well as novel spectroscopic techniques.
A 1,5-diphenylythio-substituted anthraquinone, two 1,5-diphenylamino-substituted anthraquinones, and two 2,6-diphenyl-substituted anthraquinones have been studied in the context of the dyes as guests in nematic liquid crystal hosts, using a range of experimental and computational techniques. \n \nUV-visible absorption…
Bu çalışmada eğitim ve fen fakültesi öğrencilerinin korozyon konusundaki bilgi düzeylerinin belirlenmesi amaçlanmıştır. Araştırma 2014-2015 öğretim yılının bahar döneminde Gazi Üniversitesi, Gazi Eğitim Fakültesi, Orta Öğretim Fen ve Matematik Alanları Eğitimi Bölümü, Kimya Öğretmenliği Anabilim Dalında okuyan öğrenci…
The impedance of thin VO 2 films at temperatures near the metal-semiconductor phase transition has been studied. It has been found that, in the low-temperature region, there is an abrupt change in the impedance. It has been demonstrated that the nature of this phenomenon is connected with thermoinertial processes in t…
The lutetium tantalate compounds obtained from Lu 2 O 3 –Ta 2 O 5 with a molar ratio of 0.515:0.485 were studied by Raman scattering and x-ray diffraction. The results of the room temperature Raman scattering indicate that the sample has a phase transition between 1830 °C and 1872 °C, the polycrystalline is a mixture…
Τα σύνθετα πολυμερικά υλικά οδοντιατρικών αποκαταστάσεων αποτελούν ένα σύγχρονο και πολύ ενδιαφέρον πεδίο έρευνας. Αποτελούνται από δυο κύριες φάσεις, την οργανική μήτρα, (συμπολυμερή των Bis-GMA, Bis-EMA, UDMA ή TEGDMA) και την ανόργανη ενισχυτική φάση που είναι κυρίως SiO2 ή/και άλλες ανόργανες ενώσεις. Χαρακτηρίζον…
CoCrMo Metal on Metal (MoM) hip implants were designed to be durable, targeting a better quality of life for young, active patients. However, evidence suggests that such implants can release wear particles and metal ions due to a bio-tribocorrosion process. Metallic particles, produced by wear, at articulating interfa…
El quitosano es un polímero de glucosamina con importantes propiedades como compuesto antimicrobiano e inductor de respuestas defensivas en plantas, el cual emerge como una alternativa ecológica al empleo de pesticidas. El objetivo del presente trabajo fue evaluar el efecto que ejerce este polímero en el crecimiento y…
Secondary-active trans-membrane transporters couple the ‘downhill’ movement of ions with the ‘uphill’ movement of essential substrates, such as neurotransmitters or metabolites, across the cell membrane. Disruption of \nthese vital processes is linked to some severe diseases in humans, for example Parkinson’s disease.…
nanopowders of tungsten oxide (WO3) have been prepared by high energy ball-milling for various spans of mill time (1-18 h). The crystal structure, surface morphology of the prepared WO3 nanopowder were characterized by X-ray diffraction and scanning electron microscope. Thick films of WO3 nanopowders were prepared by…
International audience
This study presents the manner in which transient modeling concepts, which are fully analyzed in the referred standards, are implemented, for the purpose of evaluating the Transient Ground Potential Rise (TGPR). This is a phenomenon of 10–100kV voltages with up to 10µs duration on the grounded enclosure of Gas Insulat…