As regards if curing stops for some time and then resumes again, then strength gain will also stop and reactive, in this study with choose suitable curing conditions after improper first curing (recurring) for normal and silica-fume concrete, Effect of this curing conditions on strength and permeability was investigated. The results from tests such as compressive strength, capillary water absor...

PURPOSE The aim of this study was to compare postoperative sensitivity following placement of posterior composite restorations using the fast- or step-curing modes of an LED curing light. MATERIALS AND METHODS Thirty patients participated, with each having two homologous contralateral posterior teeth with Class II carious lesions. One restoration was cured using the fast-curing mode of the LE...

present research involves the complete simulation of pultrusion manufacturing process of glass/polyester composites. for that purpose, the curing process is divided to two liquid and gel-solid phases. the physical characteristics of the resin consist of specific heat, viscosity and coefficient of heat transfer changes with variations of temperature and increasing the degree of curing process (α...

the cognitive predictors (i.e.,phonological awareness, and rapid automatized naming) underlying reading achievement have not been researched in iranian partial english immersion and non-immersion programs. the present study sought to investigate the relationship between english and persian phonological awareness (pa), rapid autamatized naming (ran) and reading achievementof iranian students in ...

UNLABELLED Indirect restorations in contact with free gingival margins or principally within the gingival sulcus, where the presence of organic acids produced by oral biofilm is higher, may present faster degradation of the resin-based cement pellicle. OBJECTIVES To investigate the degradation of four resin-based cements: Rely X ARC (R), Variolink II (V), Enforce (E) and All Cem (A), after im...

For centuries, Damask rose has been one of the most popular species of the rose family. Damask rose can be propagated using vegetative methods such as micropropagation. In this research, the use of temporary immersion system was reported for the first time for Damask rose micropropagation. For this reason, a traditional temporary immersion system was designed to facilitate its micropropagation....

As a solid waste, the amount of residual sludge produced by municipal wastewater treatment process is escalating. How to dispose it properly attracting much attention in society. Herein, solidifying using magnesium oxychloride cement (MOC) promising for converting into building materials. Various factors mass ratio (RW/S) liquid solid, molar (Rn) MgO MgCl2 MOC, (Rm) concentration Na2SiO3 (DNa2S...

The cognitive predictors (i.e.,Phonological Awareness, and Rapid Automatized Naming) underlying reading achievement have not been researched in Iranian partial English immersion and non-immersion programs. The present study sought to investigate the relationship between English and Persian Phonological Awareness (PA), Rapid Autamatized Naming (RAN) and reading achievementof Iranian students in ...

The purpose of this study was to analyze the curing behavior of a nanocomposite by assessing in real time the degree of cure at depths of 2 mm and 6 mm. The variation of hardness with depth, shrinkage stress, and curing time until gelation with 16 curing regimes was further investigated using one halogen and three LED curing units. In the present study, it was shown that the soft-start polymeri...

PURPOSE The objective of this study was to compare the light transmittance of zirconia in different thicknesses using various light curing units. MATERIALS AND METHODS A total of 21 disc-shaped zirconia specimens (5 mm in diameter) in different thicknesses (0.3, 0.5 and 0.8 mm) were prepared. The light transmittance of the specimens under three different light-curing units (quartz tungsten ha...