Setting reaction of new bioceramic root canal sealers

Objective: This study aimed to evaluate setting reaction and the time of three bioceramics (Endosequence, iRoot-SP, and Smartpastebio) compared with glass ionomer (ActiV-GP) root canal sealers.

Materials and methods: Setting reaction was tested using Fourier Transform Infrared Spectroscopy and X-ray Diffraction; setting time was measured using a Vicat needle.

Results: Three-bioceramic sealers composed of calcium hydroxide, calcium phosphate, calcium silicate, silicon oxide, and zirconium oxide. During their setting, calcite and calcium phosphate silicate were detected. Their setting took longer time than ActiV-GP that have aluminum polyacrylate and calcium phosphate silicate in set mass.

Conclusions: Bioceramic sealers took longer time to set than expected.     

Total Conserved Charges of Charged Rotating Ads Solution Using a Poincaré Gauge Version

Within the framework of the theory of teleparallel gravity, we formulate a class of spacetime in 4-dimensions which is asymptotically approaches to (anti)-de Sitter, Ads, geometry. This spacetime describes an electrically charged rotating solution in cylindrical coordinate. The total conserved charges of this spacetime is calculated by using a relocalization of the total conserved charge, i.e. a Poincaré gauge version and a satisfactory result is achieved.     

Cylindrically Symmetric Solution in Teleparallel Theory

The field equations of a special class of teleparallel theory of gravitation and electromagnetic fields are applied to tetrad space having cylindrical symmetry with four unknown functions of radial coordinate r and azimuth angle θ. The vacuum stress-energy momentum tensor with one assumption concerning its specific form generates one non-trivial exact analytic solution. This solution is characterized by a constant magnetic field parameter B0. If B0 = 0, then the solution will reduce to the flat spacetime. The energy content is calculated using the superpotential given by MФller in the framework of teleparallel geometry. The energy contained in a sphere is found to be different from the pervious results.     

Reaction of 2‐Imino‐2H‐chromene‐3‐carboxamide with Phosphorus Isothiocyanates: First Synthesis of Novel Chromeno[2,3‐d]pyrimidinyl and Bis(chromeno[2,3‐d]pyrimidinyl)phosphines and Chromeno[2′,3′:4,5]pyrimido[2,1‐d][1,3,5,2]triazaphosphinine

Novel chromeno[2,3‐d]pyrimidinyl and bis(chromeno[2,3‐d]pyrimidinyl)phosphines and chromeno[2′,3′:4,5]pyrimido[2,1‐d][1,3,5,2]triazaphosphinine were obtained in a simple one‐pot procedure via treatment of 2‐imino‐2H‐chromene‐3‐carboxamide with phenyl phosphorus isothiocyanates. Possible reaction mechanisms were proposed. The structures of the obtained products were confirmed by elemental analyses and spectral tools.     

Synthesis and Evaluation of Novel Cholestanoheterocyclic Steroids as Anticancer Agents

Applied Biochemistry and Biotechnology - Modification of steroid molecules by introducing heterocyclic ring into the core structure of steroids has been utilized as an attractive approach for...     

Solutions to Class of Linear and Nonlinear Fractional Differential Equations

In this paper, the fractional auxiliary sub-equation expansion method is proposed to solve nonlinear fractional differential equations. To illustrate the effectiveness of the method, we discuss the space-time fractional Kd V equation, the space-time fractional RLW equation, the space-time fractional Boussinesq equation, and the(3+1)-spacetime fractional ZK equation. The solutions are expressed in terms of fractional hyperbolic and fractional trigonometric functions. These solutions are useful to understand the mechanisms of the complicated nonlinear physical phenomena and fractional differential equations. Among these solutions, some are found for the first time. The analytical solution of homogenous linear FDEs with constant coefficients are obtained by using the series and the Mittag–Leffler function methods. The obtained results recover the well-know solutions when α = 1.     

Ferroelectric phase transition in Ga2Te3 single crystals

Measurements of the electrical conductivity and Hall effect were carried out in a wide temperature range (200-500 K) for Ga₂Te₃ crystals. The crystals were grown in single crystalline form by making a modification of the travelling heater method technique. The measurements revealed unusual observations in the electric conductivity and Hall mobility indicating the presence of some type of phase transitions at about 430 K. So, ferroelectric behavior was examined for confirming the presence of second-order (ferroelectric) phase transition. An energy gap of 1.21 eV and depth of the impurity center of 0.11 eV were found.     

Spherically symmetric solution in higher-dimensional teleparallel equivalent of general relativity

A theory of(N+1)-dimensional gravity is developed on the basis of the teleparallel equivalent of general relativity(TEGR).The fundamental gravitational field variables are the(N+1)-dimensional vector fields,defined globally on a manifold M,and the gravitational field is attributed to the torsion.The form of Lagrangian density is quadratic in torsion tensor.We then give an exact five-dimensional spherically symmetric solution(Schwarzschild(4+1)-dimensions).Finally,we calculate energy and spatial momentum using gravitational energy-momentum tensor and superpotential 2-form.     

A novel supported Katsuki-type (salen)Mn complex for asymmetric epoxidation

We have successfully prepared an unsymmetrical analogue of a Katsuki-type salen ligand having a hydroxyalkyl group at the 6-position of just one of the binaphthyl units in the ligand, and also several Mn(III) complexes; these complexes have been attached to a polymer by an ester link and such polymer catalysts have been shown to be highly enantioselective and recoverable catalysts for the epoxidation of 1,2-dihydronaphthalene.