This study used a high-density polyethylene (HDPE) polymer matrix, pine-wood flour (PWF) and walnut-shell (WSF) to produce wood-plastic composite (WPC) boards. The PWF WSF filler amounts were adjusted 20%, 30%, 40% by weight. Some of the mechanical properties produced boards comparatively investigated, such as flexural strength, modulus, deformation at break, tensile elongation break. Flexural ...

The CXC-chemokines interleukin-8 (IL-8), neutrophil-activating peptide-2 (NAP-2), and melanoma growth-stimulatory activity (MGSA) are chemoattractants with high selectivity for neutrophils. Although IL-8 has been shown to act as an extremely potent mediator, reports on NAP-2 and MGSA are still contradictory. Here we show for the first time that NAP-2 and MGSA induce two distinct optima of neutr...

In this work, Fe3O4@nano-walnut shell/BIII (FNWSB), as a reusable and new catalyst was prepared then characterized by FT-IR, XRD, FESEM, EDS-MAP, TGA. This used for synthesis of tetrahydrobenzo[a]xanthen-11-ones via three-component, one-pot condensation reaction dimedone, β-naphthol, aromatic aldehydes. An uncomplicated work-up, high yields product, short times, use low-cost are considerable ad...

walnut is a medicinal plant that its different parts such as leaf, seed, root and green husk was shown to reduce blood glucose. in iranian traditional medicine, septum of walnut shell (sws) was recommended to reduce blood glucose. but this effect should be determined with scientific researches. therefore, the aim of this study is to evaluate the effect of the aqueous extract of sws on blood glu...

Discrete methods for practical coupled three-dimensional fluid-structure interaction problems are developed. A Co explicitly integrated two-dimensional degenerate shell element and a three-dimensional fluid element are coupled to study shell dynamics, fluid transient and coupled shell-fluid interaction problems. The method of partitioning is used to integrate the fluid and shell meshes in a sta...

The paper studies optimization of shell-and-tube heat exchangers using the particle swarm optimization technique. A total cost function is formulated based on initial and annual operating costs of the heat exchangers. Six variables – shell inside diameter, tube diameter, baffle spacing, baffle cut, number of tube passes and tube layouts (triangular or square) – are considered as the design para...

In this article, stream flow effectivness is based on hydraulic network studied in the shell-side of a shell and tube heat exchange as a case study. For an appropriate heat exchangers rating design to meet a specified duty, it's better to consider each stream flow separately. Using the hydraulic network principals, a set of the correlations for calculating different stream flow rates in the cro...