objectives: this study aimed to evaluate the effects of saliva contamination on the metallic bracket microleakage bonded with two moisture-tolerant bonding systems. materials and methods:  ninety freshly extracted premolar teeth were randomly divided into six groups of 15 with the following treatments: g1 (control): after acid etching, assure primer and assure adhesive were applied to non-conta...

The adsorption phenomenon of neutral particles in a sample having the shape of a slab is theoretically investigated by using a particular form for the kinetic equation at the limiting surfaces. The time evolution of the bulk and surface densities is determined in a closed form by means of a simple expression. A discussion on the characteristic times entering in the problem is reported. Finally,...

In this paper, we have used spectroscopic and electron microscopic analysis to monitor the time evolution of the silver nanoparticles (Ag NP)-human hemoglobin (Hb) corona formation and to characterize the interaction of the Ag NPs with Hb. The time constants for surface plasmon resonance binding and reorganization are found to be 9.51 and 118.48 min, respectively. The drop of surface charge and...

In the context of aircraft, shimmy is an oscillatory phenomenon of the landing gear mainly due to the tire and the landing gear structural dynamics. This phenomenon which can result in severe damage to the landing gear must be damped. This paper presents a new nose landing gear model including an actuator model and a simple tire/road interface description approximating the Pacejka model to allo...

It has been reported that cavitation bubbles (air–liquid interface) by femtosecond laser and ultrasonic irradiations are effective for metastable phase crystallization in polymorph control. also noted generated mechanical shock when dropping a vial. Here we describe the of acetaminophen drop impact. In condition where spontaneous nucleation did not occur, impact produced form (form II) trihydra...

Interfaces in two-dimensional systems exhibit unexpected complex dynamical behaviors, the dynamics of a border connecting a stripe pattern and a uniform state is studied. Numerical simulations of a prototype isotropic model, the subcritical Swift-Hohenberg equation, show that this interface has transversal spatial periodic structures, zigzag dynamics and complex coarsening process. Close to a s...

Plants are able to synthesize, store and release lipophilic organic molecules known as plant volatiles (PVs) utilizing specific biological pathways and different enzymes which play vital roles in the plant's defence and in dealing with biotic and abiotic stress situations. The process of generation, storage and release of PVs by plants acquired during the course of evolution is a very complex p...

Abstract Interface induced diffusion had been identified in a thin film system damaged by electron bombardment. This new phenomenon was observed Al 2 O 3 (some nm thick)/Si substrate system, which subjected to low energy (5 keV) bombardment producing defects the layer. The produced partially relaxed. rate of relaxation is, however, different vicinity interface and "bulk" parts difference create...