L-tyrosine, B6 and folic acid are involved in biosynthesis of DOPA and consequently dopamine. The aim of this study was to investigate the antiparkinsonian effect of these agents in perphenazine-induced catatonia in rats. Murprogo method or scored muscular rigidity, which is induced by a phenothiazine, was used to evaluate the antiparkinsonian effect of these agents. A significant decrease in m...

Numerous studies have been performed on different aspects of the mechanical behavior polymer nanocomposites; however, results obtained still lack a comprehensive comparative analysis properties composites containing nanofillers shapes and concentrations subjected to static dynamic loads. Carbon were shown provide most significant improvement in elastic composites. In this paper, we present poly...

The need for mechanical metamaterials with large strain range and lightweight properties are evidenced to engineering applications. In this regard, novel helical structures proposed as suitable unit cell’s components of metamaterials. Three-dimensional composed varying coil numbers, defined in a cylindrical spatial domain shape optimized through genetic algorithm finite element script conflicti...

Due to the unique hydrothermal environments, frost heave failure of concrete lining water conveyance canals in cold regions is still frequent. The deformation after heaving and stress distribution calculated by mechanical model can be reference for design. However, previous research mainly focused on cross-section while having little attention longitudinal nonuniform damage. In this study, a bo...

Composite materials are specially created today, with the best micro and macrostructural compositions. This type of material provides certain characteristics composition, manufacture design some important advantages over traditional such as rigidity, mechanical strength, low weight, resistance to fatigue, impact wear a manufacturing cost. In recent years, have been produced used in various fiel...

in this paper, by modifying cheng-yau$'$s technique to complete hypersurfaces in $s^{n+1}(1)$, we prove a rigidity theorem under the hypothesis of the mean curvature and the normalized scalar curvature being linearly related which improve the result of [h. li, hypersurfaces with constant scalar curvature in space forms, {em math. ann.} {305} (1996), 665--672].

In this study, a new method to prepare polyvinyl alcohol (PVA) hydrogel-based woven fabric composite is presented. method, the was first stitched with PVA yarn and then subjected borax solution for simultaneously dissolving crosslinking PVA. The prepared chemically, mechanically, thermally characterized. FTIR analysis performed confirm of on reinforced surface. X-ray diffraction carried out inv...

Due to its origin from renewable resources, its biodegradability, and recently, its industrial implementation at low costs, poly(lactide) (PLA) is considered as one of the most promising ecological, bio-sourced and biodegradable plastic materials to potentially and increasingly replace traditional petroleum derived polymers in many commodity and engineering applications. Beside its relatively h...