Thermal conductivity κ(T ) and thermoelectric power S(T ) studies on (Y,Gd)Ba2(Cu1−xMnx)3O7−δ (x 0.02) superconductors are presented here. Thermal conductivity for all the samples exhibits a hump below the superconducting transition temperature Tc. The peak height of the hump decreases with the Mn content in both the Yand Gd-based systems, barring GdBa2(Cu0.99Mn0.01)3O7−δ. The peak height reduc...

introduction: the purpose of this study was to evaluate the number of distal roots and canals in mandibular first molars and their internal anatomy radiographically within iranian population. materials and methods: a total of 310 distal roots of mandibular first molars were incorporated in this study and evaluated in terms of number of roots and number and types of canals. root canal systems we...

introduction: a variety of mesial and distal projections have been suggested for separating the canals in a multi-canaled root. but there is no general agreement on the best angulation for each tooth. the purpose of this study was to evaluate the x-ray horizontal angle for separating the canals of four-canal first mandibular molars. materials and methods: forty four-canaled mandibular molars we...

taurodontism is a rare dental anomaly in which the involved tooth has an enlarged and elongated body and pulp chamber with apical displacement of the pulpal floor. endodontic treatment of these teeth is challenging, because it is hard to identify the number of root canals. in this article a case of bilateral involvement of maxillary first molars is presented. endodontic treatment of right maxil...

objective: the aim of the present study was to histopathologically evaluate follicular tissues of third molars with pericoronal radiolucenciesof less than 2 millimeters. materials and methods: in this descriptive analytic study, 100 impacted third molars with normal follicular spaces were removed and their pericoronaltissues submitted for histopathologic examination. different characteristicsof...

the main objective of endodontic therapy is the thorough mechanical and chemical cleansing of the entire root canal system and its complete obturation with an inert filling material. failure to find and fill a canal contributes toward the failure of endodontic therapy .the root canal anatomy of mandibular first molars is complex. studies of the morphologic structure of root canal systems have d...

this work presents a model for calculating the effective ‎thermal conductivity of nanofluids. the proposed model ‎includes the effects of nanoparticles and thermal conductivity ‎base fluid.we will focus on experimental of the volume ‎concentration parameter and temperature on thermal ‎conductivity, nano-fluid combination and multi-walled ‎carbon nanotubes-oxide / copper-paid deionized water. th...

Six new complexes of palladium(II) with a general formula [Pd(L)2Cl2], where L = 2-amino-4-(4-subsistuted phenyl)thiazole. The palladium were prepared by the reaction phenyl)thiazole ligands Bis(benzonitrile)palladium(II) dichloride in chloroform solvent at molar ratio Pd:L=1:2. resulting characterized magnetic susceptibility, conductivity measurements, infrared, 1H NMR and thermo gravimetric a...

In order to control the deposition of Zn-related films by chemical bath deposition, effects Zn-complexing agent are analyzed. ZnS were produced technique employing sodium citrate, ethanolamine and Triethanolamine as complexing agents. The conditions for (ZnO) thin obtained through a thermodynamic analysis, using distribution diagrams molar fraction Zn complexes. From species Zn-ethanolamine, Zn...