We report studies on the rheological properties of a liquid crystalline analog of Abrikosov phase in type-II superconductors known as twist-grain-boundary-A (TGB(A)) phase. The TGB(A) phase shows a large apparent yield stress compared to the cholesteric (N*) phase. The storage modulus (G') of the TGB(A) phase is significantly larger than the loss modulus (G''). The dynamic relaxation measuremen...

Effects of modifying oil palm mesocarp fibers (OPMF) by methacrylate silane on polylactic acid (PLA)/ polycaprolactone (PCL)/clay/OPMF hybrid composites were investigated. The composites were prepared by a melt blending technique and characterized by dynamic mechanical analysis (DMA) and scanning electron microscopy (SEM). The silane-treated OPMF hybrid composites showed better tensile strength...

In the present study water extractable arabinoxylans (WEAX) from a Mexican spring wheat flour (cv. Tacupeto F2001) were isolated, characterized and gelled and the gel rheological properties and microstructure were investigated. These WEAX presented an arabinose to xylose ratio of 0.66, a ferulic acid and diferulic acid content of 0.526 and 0.036 µg/mg WEAX, respectively and a Fourier Transform ...

In this study, data mining and knowledge discovery techniques were employed to acquire new information about the viscoelastic, flexural, compression, and tension properties for vapor-grown carbon nanofiber (VGCNF)/vinyl ester (VE) nanocomposites. These properties were used to design a unified VGCNF/VE framework solely from data derived from a designed experimental study. Formulation and process...

Hydroxyapatite is a biocompatible ceramic and reinforcement for bone implantations. SEVA/HAP composite content HAP filler with difference particle sizes were designed. Mechanical tests like tensile modulus, UTS, strain at break and biodegradation were investigated. Results illustrated much increase tensile modulus of composites content HAP nano powders ratio to micro powders. Also UTS analysis ...

The viscoelastic properties of protein solutions were measured in a frequency-dependent manner after polymerization. Fig. l a -d show the storage modulus (G') , loss modulus (G"), viscosity (q) and phase shift (9) of actin solutions and actin solutions cross-linked with filamin at various concentrations recorded between 2x1 O-3Hz and 2Hz. Results of these measurements indicate that polymerized ...

The small intestinal submucosa (SIS) is an acellular collagen-based matrix, primarily composed of fibrillar collagens (types I, II, and V). They enhance healing due to a minimal immune response. A good degradation rate is the degradation of materials equal to the rate of remodeling in the host. The SIS should apply a good degradation rate and cytocompatibility. In this study, a series of SIS wi...

We demonstrate the feasibility of low-cost tabletop MR elastography (MRE) for quantifying the complex shear modulus G(∗) of small soft biological tissue samples as provided by pathologists. The MRE system was developed based on a tabletop MRI scanner equipped with a 0.5 T permanent magnet and a tissue sample holder mounted to a loudspeaker. A spin echo sequence was enhanced with motion-encoding...

the main purpose of cementing of the well is to provide effective zonal isolation for the entire life of wells. the standard cements cannot prevent loss of zonal isolation when the stress level in the well cement is severely fluctuated. since elastic cements improve elastic properties, recently, a number of studies have been done in this area. for this purpose, a nanoparticle, named ex-ripi, wa...