Materials Literature
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The efficacy of UV disinfection of water depends on the ability of radiation to pass from UV lamps through the quartz sleeves that encase them; the accumulation of metal-containing foulants on sleeve surfaces inhibits disinfection by absorbing radiation that would otherwise be available for inactivation. In a series o…
Abstract Purpose – The paper aims to develop a system and measuring method for investigating the dynamic pressure behavior of compression garments. Design/methodology/approach – The dynamic pressure behavior measurement, realized by use of the self‐designed system, is a direct measuring method, which is based on a rig…
Acoustic emission (AE) behaviour during the electrochemical corrosion of 304 stainless steel (304SS) in H 2 SO 4 solutions was studied. AE signals which related to transpassive dissolution are detected in solutions with low pH, and are very slightly influenced by current density and pre-strain. During hydrogen bubble…
Dwarf-green coconut fibers were modified by alkali treatment and characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), as well as thermogravimetric (TGA), mechanical, and dielectric analyses. Changes in composition, structure, and morphology of t…
Different fermentation strategies were employed for the cultivation of a new poly(3-hydroxybutyrate)-accumulating thermophilic bacterium, Chelatococcus sp. strain MW10, with the aim of achieving high-cell-density (HCD) growth and high poly(3-hydroxybutyrate) [poly(3HB)] productivity. Enhanced cultivation was achieved…
In this paper we reexamine recent results obtained by our group on the crystallization of nanocomposites and linear and miktoarm star copolymers in order to obtain some general features of their crystallization properties. Different nanocomposites have been prepared where a close interaction between the polymer matrix…
Polyhydroxyalkanoates (PHAs) are accumulated as intracellular carbon and energy storage polymers by various bacteria and a few haloarchaea. In this study, 28 strains belonging to 15 genera in the family Halobacteriaceae were investigated with respect to their ability to synthesize PHAs and the types of their PHA synth…
Polymer nanocomposites containing layered silicates have been considered as a new generation of composite materials due to their expected unique properties attributed to the high aspect ratio of the inorganic platelets. Nevertheless, addition of layered silicates to polyolefins mostly results in phase separated system…
Phonon dispersions in <100> silicon nanowires (SiNW) are modeled using a Modified Valence Force Field (MVFF) method based on atomistic force constants. The model replicates the bulk Si phonon dispersion very well. In SiNWs, apart from four acoustic like branches, a lot of flat branches appear indicating strong phonon…
We first analyze why the iron pnictides with high $T_c$ superconductivity so far are As-based, by the Hund's rule correlation picture, then examine the P-based and Sb-based cases, respectively. Consequently, we propose that CaClFeP with ZrCuSiAs-type structure is an As-free high $T_c$ iron-pnictide. The subsequent den…
The aim of this work is to study the electron irradiation behavior of glass containing alkali ions using a scanning electron microscope (SEM). Charge trapping and charge spreading in this kind of glass have been examined using a time resolved current method. Our interest concerns more particularly the dynamic behaviou…
It was established on the basis of a set of physico-chemical data that polyelectrolyte complexes (PECs) are formed in a solution containing cation-active oligomers and low-molecular compounds. Here- with, the composition, structure, and stability of PECs depend on the ratio and nature of the initial ingredients. It wa…
We have studied zeolitic rocks discovered in Mongolia using electron microscopy (SEM), X-ray fluorescence (XRF), X-ray diffraction (XRD) methods. SEM, XRF and XRD measurements were carried out in the Max Plank Institute of Stuttgart, Germany. Our samples are collected from Mongolian deposits: Tsagaan tsav, Tushig uul,…
Selecting Si3N4 as binding agent and Al2O3–Al–Y2O3 as sintering additives, the sintered compact of polycrystalline cubic boron nitride (PcBN) was studied . By modifying the ratio of each component and the parameters of the sintering process, the compact sintered at 4.5 GPa and 1650 °C showed good mechanical properties…
Power is the direct force in the process of electrospinning, as voltage takes one of the great main roles effecting the quantity of the fiber, making a model of the generater would be in sense to control the morphology.On analysising the working principle,this paper first design a suitable high voltage dc power,and th…
The aging hardening curve of AZ91D magnesium alloy was gained, and aging behavior of the alloy was investigated with Vickers hardness measurement, differential scanning calorimetry (DSC), transmission electron microscope (TEM) after solution treated at 415°C for 10h , and water quenched at room temperature , afterward…
PbWO4 crystals were synthesized by homogeneous precipitation in formamide (FA)/H2O solution, where the content of FA was found to play crucial role in the morphology of the final products. PbWO4 crystals with various morphologies, such as pagoda, tetra-bipyramid, and bundle of rods, were obtained with an increase of t…
CoFe2O4 powders were synthesized by combustion reaction using glycine as fuel, aiming obtaining nanosized and monophase powders. Thus, different conditions of external heating during the synthesis were investigated. The powders were prepared according to the propellants and explosives theory, using glycine as fuel in…
In this paper, cordierite (2MgO•2Al2O3•5SiO2) precursors are synthesized using TEOS and aluminum and magnesium nitrates as starting materials, citric acid as chelating agent and Tween-80 as dispersant. The effect of citric acid and Tween-80 on the formation mechanism of α-cordierite phase is investigated by using X-ra…
Mainstream CMOS technology in today's electronics continues to scale down in the feature size. However, power dissipation per unit area and variability are among two major issues and challenges for the continuing scaling. Spintronics, as an emerging technology that exploits the intrinsic spin of the carriers, could po…