Crystalline chitosan was successfully prepared from crab tendons with aligned chitin molecules. Chitosan obtained preserved the tube structure with a suitable size for nerve conduits (t-chitosan tube). The chitosan tubes were compounded with hydroxy apatite (HAp) using an alternate soaking method (t-chitosan/HAp tube) to enhance the strength of the tube walls. HAp crystals formed in the walls o...

Circular tubes are widely used in daily life and manufacture under bending load. The structural parameters of a circular tube, such as its wall thickness, number shapes ribs, supporting flanges, closely related to the tube’s rigidity. In this study, tube with eight ribs flange was optimized, order obtain lowest weight, through comprehensive optimization. We obtained optimal influence on weight....

Effect of geometry on crushing behavior, energy absorption and failure mode of woven roving jute fiber/epoxy laminated composite tubes were experimentally studied. Investigations were carried out on three different geometrical types of composite tubes (circular, square and radial corrugated) subjected to axial compressive loading. It was observed in axial crushing study that the load bearing ca...

Capillary endothelial cells can be induced to form capillary-like structures in vitro by plating on fibronectin-coated dishes (Ingber, D. E., and Folkman, J. (1989) J. Cell Biol. 109, 317-330), thereby mimicking angiogenesis. To assess the role of glycoproteins bearing asparagine-linked oligosaccharides in this process, we tested the effect of oligosaccharide processing inhibitors on the format...

Background: Heat exchanger is a device in many industrial applications and energy conversion systems. Various heat exchangers are designed for different industrial processes and applications. Shell and tube heat exchanger (STHE) has its own importance in the process industries. Methods: Experimental and numerical simulations are carried for a single shell and multiple pass heat exchangers with ...

Hybrid-wetting surfaces are commonly used in enhancing dropwise condensation (DWC) because of provide high droplet mobility and small size. The shape the patterns plays a significant role determining departure size, frequency, thus, heat transfer rates, which not introduced yet. Therefore, different pattern shapes such as circle, ellipse, diamond share same area, gap distance, arrangement have ...

The uncombed penumbral model proposed by Solanki & Montavon (1993) is used to understand some recent observational results found in penumbrae. This model uses a penumbral magnetic field structured into horizontal flux tubes embedded in a more vertical background field. A modified version of this model, with a weaker field strength in the horizontal tubes, is used to explain the gradient with he...

Breaking of the optical symmetry of a singlewall carbon nanotube (SWNT) in the Coulomb potential of a helical wrap of ionized phosphate groups of singlestranded DNA is investigated. Even for a non-chiral tube, the helical perturbation may generate "natural" optical activity in the DNA-nanotube complex. The one-electron absorption spectrum for circularly polarized light (or light polarized acros...

In this paper, the design and implementation of plasma antenna array with beam forming is discussed. The structure consists of a circular array of plasma tube enclosed in a unipolar UHF band monopole antenna. Beam forming is possible by stimulated plasma tubes. The combination of the above antenna with plasma excitation controller makes a beam forming smart antenna. An experimental model in UHF...