This paper is devoted the study of a generalized hybrid dynamical system, which consists history-dependent hemivariational inequality parabolic type and nonlinear evolution equation. The unique solvability for system established via applying surjectivity multivalued pseudomonotone operators, fixed point theorem, properties Clarke gradient. As an illustrative application, dynamic frictional cont...

background and aims. er:yag laser irradiation has been claimed to improve the adhesive properties of dentin; therefore, it has been proposed as an alternative to acid etching. the aim of this in vitro study was to investigate the shear bond strength of an etch-and-rinse adhesive system to dentin surfaces following er:yag laser and/or phosphoric acid etching. materials and methods. the roots of ...

  Objective: Different techniques have been suggested for the repair of bone defects at the injured sites. Use of biomembranes, or application of plasma rich in growth factor (PRGF) at the site of proliferation of osteoblasts are among the suggested techniques. The current study aimed to compare the biocompatibility of human periodontal ligament fibroblasts (hPLF) cultured on Hypro-Sorb F, Peri...

Polymer adhesion is ubiquitous in both the natural world and human technology. It also a complex multiscale phenomenon, such that solution of problems requires convergence chemistry, physics, engineering. In this Perspective, we provide an overview some fundamental concepts have emerged field polymer adhesion, discuss recent work, identify challenges three specific areas: (a) theories simulatio...

Aligned carbon nanotube (CNT) array adhesion strength evolves with CNT process time, decreasing and then increasing during growth annealing, as captured by models relating diameter, effective modulus, CNT–substrate work of adhesion.

drug-in-adhesive transdermal drug delivery systems  )tddss) containing stimulants, termed as energetic substances, such as caffeine and pantothenic acid, were studied. caffeine is a white crystalline substance and a stimulant to central nervous system. in humans, caffeine acts as a central nervous system stimulant, temporarily warding off drowsiness and restoring alertness. pantothenic acid, al...

most common hypotheses of seizure initiation are increased neural excitation, decreased inhibition or both. but, the conditions that lead to these activation states not to be clear yet. recent studies challenge traditional concepts and indicate new evidence that a key epileptogenic process may actually begin in the blood vessel. seizures could be initiate by a variety of insults to the brain, s...

conclusions these results indicate that the pcr method is a powerful genotypic assay for the detection of adhesin-encoding operons. thus, this assay can be recommended for clinical use to detect virulent urinary e. coli strains, as well as epidemiological studies. materials and methods a total of 100 upec isolates were obtained from urine samples of patients with uti. the prevalence of 5 virule...