immediate restoration after vital pulp therapy is essential in order to create and maintain effective coronal seal.the aim of this study was to evaluate the shear bond strength of recently used pulp capping materials: white mineral trioxide aggregate (mta), and calcium enriched mixture cement (cem) to composite resin with the use of etch-and-rinse and self-etch adhesive systems and compare them...

"Lithosphere" is a mechanical concept implying strength and relative permanence. Unfortunately, the term has also been applied to the surface thermal boundary layer (TBL) and a shallow enriched geochemical reservoir, features having nothing to do with strength. The "strong" lithosphere is about one half the thickness of the TBL. The bottom of the elastic plate, the maximum depths of midplate an...

abstractalthough the biokinetics, metabolism, and chemical toxicity of uranium are well known, until recently little attention was paid to the potential toxic effects of uranium on reproduction and development in mammals. in recent years, it has been shown that uranium is a developmental toxicant when given orally or subcutaneously (sc) to mice. decreased fertility, embryo/fetal toxicity includ...

It is generally accepted that viral and cellular products from immune competent mononuclear phagocytes (MP) (brain macrophages and microglia) underlie the neuropathogenesis of HIV-1-associated dementia (HAD). What remains unanswered, however, is the composition of and mechanisms for such MP-induced neurological dysfunctions. In attempts to address these issues culture fluids from HIV-1ADA-infec...

The influence of 600°C aging treatment on the microstructure and mechanical properties 316H stainless steel weld metals with different C contents have been studied. results indicated that during process, rapid precipitation M23C6 carbide occurred in ?-ferrite firstly owing to high diffusion rate C. After is depleted by M23C6, residual transforms into ? phase through eutectoid transformation (?-...

prior to the design and construction of any fruit harvesting machine it is essential to know the physical and mechanical properties of the trees and of its fruits. an example could be cited as the force needed to overcome. the strength with which the fruit is attached to the stem, in trunk shaker harvesting. in this research the acting forces on the fruit during harvest, including tensile stren...

Due to lack of theory of elasticity, estimation of ultimate torsional strength of reinforcement concrete beams is a difficult task. Therefore, the finite element methods could be applied for determination of strength of concrete beams. Furthermore, for complicated, highly nonlinear and ambiguous status, artificial neural networks are appropriate tools for prediction of behavior of such states. ...