Clinical microscopic analysis of protaper retreatment system efficacy considering root canal thirds using three endodontic sealers

To evaluate the efficacy of ProTaper Universal rotary retreatment system and the influence of sealer type on the presence of filling debris in the reinstrumented canals viewed in an operative clinical microscope. Forty-five palatal root canals of first molars were filled with gutta-percha and one of the following sealers: G1, EndoFill; G2, AH Plus; G3, Sealapex. The canals were then reinstrumented with ProTaper Universal rotary system. Roots were longitudinally sectioned and examined under an operative clinical microscope (10x), and the amount of filling debris on canal walls was analyzed using the AutoCAD 2004 software. A single operator used a specific software tool to outline the canal area and the filling debris area in each third (cervical, middle, and apical), as well as the total canal area. Data were analyzed by Kruskal-Wallis test and Tukey test at P < 0.05. Sealapex demonstrated significant differences in the average of filling debris area/canal among the 3 thirds. This group revealed that apical third showed more debris than the both cervical and middle third (P < 0.0001). Endofill presented significantly more filling debris than Sealapex in the cervical third (P < 0.05). In the middle (P = 0.12) and apical third (P = 0.10), there were no differences amongst groups. Debris was left in all canal thirds, regardless of the retreatment technique. The greatest differences between techniques and sealers were found in the cervical third. Microsc. Res. Tech. 75:12331236, 2012. (C) 2012 Wiley Periodicals, Inc.

Selection of compositions with high glass forming ability in the Ni-Nb-B alloy system

A combination of an extension of the topological instability "λ criterion" and the "average electronegativity" has been recently reported in the literature to predict compositions with high glass-forming ability (GFA). In the present work, both criteria have been applied to select the Ni61.0Nb36.0B3 alloy with a high glass-forming ability. Ingots were prepared by arc-melting and were used to produce ribbons processed by the melt-spinning technique further characterized by differential scanning calorimetry (DSC), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The Ni61.0Nb36.0B3 alloy revealed a complete amorphization and supercooled liquid region ΔTx = 68 K. In addition, wedge-shaped samples were prepared using copper mold casting in order to determine the critical thickness for amorphous formation. Scanning electron microscopy (SEM) revealed that fully amorphous samples could be obtained, reaching up to ~800 µm in thickness.

Development of a microgrid with renewable energy sources and electrochemical storage system integration

Beside the traditional paradigm of "centralized" power generation, a new concept of "distributed" generation is emerging, in which the same user becomes pro-sumer. During this transition, the Energy Storage Systems (ESS) can provide multiple services and features, which are necessary for a higher quality of the electrical system and for the optimization of non-programmable Renewable Energy Source (RES) power plants. A ESS prototype was designed, developed and integrated into a renewable energy production system in order to create a smart microgrid and consequently manage in an efficient and intelligent way the energy flow as a function of the power demand. The produced energy can be introduced into the grid, supplied to the load directly or stored in batteries. The microgrid is composed by a 7 kW wind turbine (WT) and a 17 kW photovoltaic (PV) plant are part of. The load is given by electrical utilities of a cheese factory. The ESS is composed by the following two subsystems, a Battery Energy Storage System (BESS) and a Power Control System (PCS). With the aim of sizing the ESS, a Remote Grid Analyzer (RGA) was designed, realized and connected to the wind turbine, photovoltaic plant and the switchboard. Afterwards, different electrochemical storage technologies were studied, and taking into account the load requirements present in the cheese factory, the most suitable solution was identified in the high temperatures salt Na-NiCl2 battery technology. The data acquisition from all electrical utilities provided a detailed load analysis, indicating the optimal storage size equal to a 30 kW battery system. Moreover a container was designed and realized to locate the BESS and PCS, meeting all the requirements and safety conditions. Furthermore, a smart control system was implemented in order to handle the different applications of the ESS, such as peak shaving or load levelling.

Dissertatio Inavgvralis Ivridica De Banno Ivdaeorvm : Qvo Secvndvm Leges S. R. I. Liberae Civitatis Ad Moenvm Francofvrtensis Res Amissae Vel Fvrto Ablatae Restitvto Pretio Recvperantvr Vvlgo Vom Ivden-Schvl-Bann

Altdort, Univ., Diss., 1757

Romanicae res

Spartacus

Ms. hebr. fol. 3 - Ḳunṭres bene Aharon

Vorbesitzer: Aaron Ben-Moses Fuld

Leben und Thaten des allgemein bekannten Wiener-Fiakers Freyherrn von Vogelhuber und seiner Gemalin [sic!] Therese (Genannt Vogelhurber Res'l): Die Wiener Fiaker sind wegen ihres bekannten Witzes und ihrer Orginalität [sic!] sowohl unter Eingebornen als Fremden längst berühmt ...

Welsch (Projektbearbeiter): Kurze humoristische Darstellung des Lebenslaufes des Freiherrn J. von Vogelhuber, dem Sohn des bekannten Juristen Joseph von Vogelhuber (1750 - 1831), der nach der Verschleuderung seines väterlichen Erbteils die Laufbahn eines Fiakerführers einschlug

Hungaricae res

Jakob Krausz

Kunṭres Ḥevrat Rodfe Ḥesed : tokho yevoar ʿal ma ʿamude ḥevratenu ḥevrat g. ḥ. yusdu, ṿe-gam taḳanoteha ha-yesharot

Text in hebr. und jidd., in hebr. Schr.

Historia Judaica : Res Judæorum Ab Eversa Æde Hierosolymitana, Ad Hæc fere tempora usque, Complexa

[Salomo filius Virgae]. De Hebræo in Latinum versa A Georgio Gentio

Res Fischer, Rollenbild, Hüftbild

Signatur des Originals: S 36/F03682

Res Fischer, Brustbild

Signatur des Originals: S 36/F03683

Erik Wirl, Res Fischer, Rollenbild, Doppelbildnis

Signatur des Originals: S 36/F07260

Emmy Hainmüller als Euridice, Res Fischer als Orfeo, Szenenfoto, Doppelbildnis, in: Christoph Willibald Gluck: Orfeo ed Euridice, Frankfurt a. M.: Opernhaus, 1935

Signatur des Originals: S 36/F08746