Search results for "204"
showing 10 items of 5248 documents
On the high-pressure phase stability and elastic properties ofβ-titanium alloys
2017
We have studied the compressibility and stability of different β-titanium alloys at high pressure, including binary Ti–Mo, Ti–24Nb–4Zr–8Sn (Ti2448) and Ti–36Nb–2Ta–0.3O (gum metal). We observed stability of the β phase in these alloys to 40 GPa, well into the ω phase region in the P–T diagram of pure titanium. Gum metal was pressurised above 70 GPa and forms a phase with a crystal structure similar to the η phase of pure Ti. The bulk moduli determined for the different alloys range from 97 ± 3 GPa (Ti2448) to 124 ± 6 GPa (Ti–16.8Mo–0.13O).
Removal of silicon from CFB-derived fly ash leachate in the context of phosphorus recovery
2018
High concentrations of dissolved silica in the acid leachate impose two major challenges on precipitation based recovery of phosphorus (P). Firstly, co-precipitation of colloidal silica in the acidic regimes decreases the purity and value of precipitated P-products. In addition, silica scaling on internal surfaces of equipment is also a problematic issue in industrial operations. Therefore, removal of dissolved silica prior to P-recovery process minimizes the risks of Si-contamination in P-products and Si-scaling. In the present study, silica removal was achieved by accelerated silica polymerization with higher acidity and ionic strength of mineral acid, which also assisted the leaching of …
Impact of Platelet Reactivity in ACS Patients on Clinical Outcomes with Triple Antithrombotic Therapy
2021
Optimal antithrombotic therapy after percutaneous coronary intervention (PCI) in patients on oral anticoagulants (OAC) remains a clinical conundrum. In fact, combining an OAC with dual antiplatelet therapy (triple antithrombotic therapy, TAT) increases the risk of bleeding. Clopidogrel is the only thienopyridine recommended in TAT patients. Whether its response plays a relevant role in this setting remains uncertain. We aimed to evaluate the level of platelet reactivity inhibition (PRI) achieved by oral TAT in Acute Coronary Syndrome (ACS) patients undergoing PCI and its relationship with outcomes. We performed a multicenter prospective observational study and assessed PRI by vasodilator-st…
«Cual doctora en cielo graduada...». The feminine poetry for literary contests in honor of the beatification and canonization of Teresa of Ávila (Val…
2015
L’objectiu d’aquest estudi és examinar les composicions poètiques aportades per dones als tres certàmens celebrats a València i Barcelona, amb motiu de la beatificació (1614) i posterior canonització (1622) de Teresa de Jesús; dos moments clau per a la consolidació de la fama de la carmelitana avilesa que van possibilitar l’exhibició pública i impressió de poesia femenina. Analitzem també la participació femenina catalana al certamen celebrat a Saragossa el 1614 per la beatificació. L’estudi està enfocat des d’una perspectiva femenina, a través de la revisió de dihuit poesies amb signatura de dones que ens han transmès les extenses relacions impreses. Al llarg del comentari dels poemes, ana…
Sátira y política en el primer republicanismo: los tres juicios de Juan Martínez Villergas (1840-1854)
2019
El texto analiza la importancia que tuvo el uso literario de la sátira para la cultura política del primer republicanismo español a través de la figura de Juan Martínez Villergas (1817-1894), el más conocido autor satírico de la España de las décadas centrales del siglo XIX. Se señalan el sentido y la utilidad de este género literario para esta cultura política. Asimismo, se apunta a cómo la confluencia entre la actividad política y la literaria configuraron un determinado modelo de poeta revolucionario y una forma de entender la literatura que empezó a ser cuestionada y arrinconada en la España posrevolucionaria, bajo la hegemonía cultural del liberalismo respetable.
Effects of Polyacrylic Acid Pre-Treatment on Bonded-Dentine Interfaces Created with a Modern Bioactive Resin-Modified Glass Ionomer Cement and Subjec…
2018
Objectives: Resin-modified glass ionomer cements (RMGIC) are considered excellent restorative materials with unique therapeutic and anti-cariogenic activity. However, concerns exist regarding the use of polyacrylic acid as a dentine conditioner as it may influence the bonding performance of RMGIC. The aim of this study was to evaluate the effect of different protocols for cycling mechanical stress on the bond durability and interfacial ultramorphology of a modern RMGIC applied to dentine pre-treated with/without polyacrylic acid conditioner (PAA). Methods: The RMGIC was applied onto human dentine specimens prepared with silicon-carbide (SiC) abrasive paper with or without the use of a PAA c…
Pro-Degradant Activity of Naturally Occurring Compounds on Polyethylene in Accelerate Weathering Conditions
2019
In this work, naturally occurring compounds, such as Vitamin E (VE) and Ferulic Acid (FA), at high concentrations, have been considered as pro-degradant agents for Low Density Polyethylene (PE). However, all obtained results using the naturally occurring molecules as pro-oxidant agents for PE have been compared with the results achieved using a classical pro-oxidant agent, such as calcium stearate (Ca stearate) and with neat PE. The preliminary characterization, through rheological, mechanical and thermal analysis, of the PE-based systems highlights that the used naturally occurring molecules are able to exert a slight plasticizing action on PE and subsequently the PE rigidity and crystalli…
Prejudicis i censures en la filologia catalana medieval
2014
A la vista de diverses publicacions recents, en les quals se citen treballs meus de forma incompleta i tergiversada, em veig en l’obligació d’esmenar les errades i de donar nous arguments a favor de la meua hipòtesi sobre la producció literària de Joan Roís de Corella. Aquest article, així com d’altres anteriors, s’inscriu en l’àmbit acadèmic de la recerca, en el qual sempre he estat un investigador curós i independent, sense negligir els aspectes que puguen considerar-se polèmics. In view of several recent publications, in which there are mentioned my works in a incomplete and distorted way, I feel obliged to correct the mistakes and also provide new arguments in favor of my hypothesis on …
Interactively Learning the Preferences of a Decision Maker in Multi-objective Optimization Utilizing Belief-rules
2020
Many real life problems can be modelled as multiobjective optimization problems. Such problems often consist of multiple conflicting objectives to be optimized simultaneously. Multiple optimal solutions exist to these problems, and a single solution cannot be said to be the best without preferences given by a domain expert. Preferences can be used to find satisfying solutions: optimal solutions, which best match the expert’s preferences. To model the preferences of the expert, and aid him/her in finding satisfying solutions, a novel method is proposed. The method utilizes machine learning combined with belief-rule based systems to adaptively train a belief rule based system to learn a domai…
Closed tank pneumatic press application to improve Sauvignon Blanc wine quality and nutraceutical properties
2019
The machines used in the winemaking process directly affect the quality of wine and its nutraceutical properties. Grapes-pressing is a very important step in winemaking as it may promote the presence and/or absence of enzymatic processes on the must, leading to the creation of different products in terms of chemical composition, starting from the same grapes. The aim of the study was to compare two different pressing systems of Sauvignon Blanc grapes using an innovative pneumatic discontinuous closed tank press in two operating modes: the traditional pressing mode in presence of oxygen and the inert pressing mode, performed through grapes pressing under inert gas with nitrogen recovery. Che…