The main objective of this research is to manufacture expanded perlite (EP) foam-filled stainless steel tubes for energy absorption application and investigate their physical compressive behavior. Foam-filled (FFT) were manufactured by consolidating perlite/sodium silicate composite foam inside the tube. EP particles size 5-6 mm taken manufacturing FFTs. Two different sodium solution water (S/W...

We discuss the possibility of controlling biological systems, by exciting in the near infrared region hybrid metallic nanotube ropes, dressed with proteins and embedded in the biosystems. If one nanotube, in a double-tube rope, is filled with metallofullerenes and the other is empty, the two tubes change their opposite equilibrium charging during the irradiation. The resulting change of the loc...

In this paper, a novel foam-filled double ellipse tube (F-DET) is proposed. First, the circle and ellipse tubes with three different configurations(hollow, foam-filled, double foam-filled) are investigated under axial and oblique impact by using the nonlinear finite element code LS-DYNA. The numerical results showed that the F-DET tube has the best crashworthiness performance than tubes with ot...

Insufficient bearing capacity of compression bars in space grid structures can significantly reduce the collapse resistance and cause immeasurable losses. Reactive powder concrete (RPC) with high strength, micro-expansion, good ductility is used to reinforce members by infilling steel tubes. Axial tests on five types high-frequency welded pipes different section sizes initial stresses were carr...

The cardiovascular system of bilaterians developed from a common ancestor. However, no endothelial cells exist in invertebrates demonstrating that primitive cardiovascular tubes do not require this vertebrate-specific cell type in order to form. This raises the question of how cardiovascular tubes form in invertebrates? Here we discovered that in the invertebrate cephalochordate amphioxus, the ...

We present a lattice model of water confined in a hydrophobic nanotube. Using analytical methods and computer simulation, we find conditions where filled and empty tubes can be degenerate in equilibrium. We further find that flow of water molecules through a filled tube with appropriate but simple stochastic rules can be interpreted as water conduction in a pulse-like fashion. These two results...

OBJECTIVES This study was performed to evaluate the cytotoxicity of four calcium silicate-based endodontic cements at different storage times after mixing. MATERIALS AND METHODS Capillary tubes were filled with Biodentine (Septodont), Calcium Enriched Mixture (CEM cement, BioniqueDent), Tech Biosealer Endo (Tech Biosealer) and ProRoot MTA (Dentsply Tulsa Dental). Empty tubes and tubes contain...

The uses of recycled materials in composites provide the potential for large cost savings and a solution to the ever-growing disposal problem. Shingles contain petroleum based binders and fillers, which used as a valuable resource in composite production. Composites offer inherent advantages over traditional materials in regard to corrosion resistance, design flexibility and extended service li...

Nickel nanorods encapsulated inside the multiwalled carbon nanotubes were prepared using microwave plasma chemical vapor deposition (MPCVD) technique. The as prepared tubes were investigated by scanning electron microcopy (SEM), x-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM). HRTEM study of these tubes exhibits long, good crystalline nickel filled CNTs with...