Materials Literature
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This study presents the effect of carbon to nitrogen ratio (C/N) (mol/mol) on the cell growth and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) accumulation by Comamonas sp. EB172 in 2 L fermenters using volatile fatty acids (VFA) as the carbon source. This VFA was supplemented with ammonium sulphate and yeast extract…
In this paper, high density polyethylene (HDPE)/wood flour (WF) composite foams were prepared by using an intermeshing co-rotating twin screw extruder followed by an injection molding. Experimental design based on Taguchi method was applied to investigate the effects of "concentrations and types of chemical foaming ag…
High quality graphene is synthesized by pyrolysis of poly (acrylic acid) sodium salt, a novel catalyst-free cost-effective process. A strong Raman signature at 2698 cm−1 and a small defect (D) band (D/G ratio) confirm the high quality of the synthesized material. Analysis of the Raman parameters implies that it is a 1…
Crystallization following Ostwald's step rule is given theoretical consideration on the basis of the classical nucleation and growth theory. Conditions for homogeneous 3D nucleation of the thermodynamically metastable crystal, for that of the stable crystal, and for co-precipitation of them are derived from comparison…
The isothermally crystallized poly(L-lactide) (PLLA) samples were obtained at 135 °C under pressures (Pc) ranging from 1 bar to 2.5 kbar. The crystalline structures, the structure transition, and thermal properties of the prepared samples were investigated by wide-angle X-ray diffraction (WAXD), real time synchrotron…
Corrosion behaviour of cast iron and low alloy steel in cocoa liquor and well water was investigated. The average weight losses of the specimens were measured using digital weighing balance. The results showed that the weight losses of both cast iron and low alloy steel in both media increases with time. Corrosion rat…
We report here X-ray, electrical switching and dielectric measurements on a binary system comprising achiral bent-core and chiral rod-like components. While the pure bent-core compound exhibits a single mesophase, namely the B2 phase, the rod-like compound shows smectic A and smectic C* mesophases. A particular mixtur…
A carbon-nanotube (CNT)/silver/polymer composite fiber was fabricated using carbon nanotube fiber (CNTF) to infiltrate silver-paste liquid for effective reinforcement of electrical conductivity and strength of the CNT fibers. The as-obtained composite fiber is still flexible with a content of 43 wt% CNTs. Scanning ele…
The effects of the solution-annealing temperature on the precipitation of secondary phases and the associated pitting corrosion resistance in hyper duplex stainless steel after aging at 1123 K were investigated in a highly concentrated chloride solution. Increasing the solution annealing temperature from 1333 to 1413…
Zinc oxide (ZnO)/titanium dioxide (TiO 2 ) nanorods have been synthesized via a hydrothermal method for ZnO nanorods and an electron-beam deposition for TiO 2 nanorods. This work examined the effect of annealing ZnO seed layer on the photocatalytic activity of the ZnO/TiO 2 nanorods which was determined from photodeco…
The new tetradentate ligand H2L bis(5-(pyridine-2-yl)-1,2,4-triazol-3-yl)methane ligand H2L has been used to prepare corresponding Ln(III) complexes [Ln(L)(HL)H2O]·6H2O where Ln(III) is Tb(III), Sm(III), Eu(III), Gd(III), Nd(III). The resulting complexes were investigated by various means including elemental- and ther…
Poly(lactic acid), PLA, is a biodegradable polymer, but its applications are limited by its high cost and relatively poorer properties when compared to petroleum-based plastics. The addition of starch powder into PLA is one of the most promising efforts because starch is an abundant and cheap biopolymer. However, the…
Highly fluorescent CdSe/CdS/ZnS core/shell/shell QD@SiO2 NPs have been synthesized via a reverse microemulsion approach with a novel post-treatment process by combining annealing with photoactivation. The QD@SiO2 NPs have a high photoluminescent quantum yield of up to 56% and were successfully applied to cellular upta…
The inhibitive performance of leaf extracts of cinnamoum zeylanicum (CZ) was tested as natural corrosion inhibitor for mild steel in 0.5 M HCl and 0.5 M H2SO4, respectively by using gravimetric and electrochemical techniques. The data obtained from both the methods are in good agreement with each other. Results indica…
Hoodia gordonii, a popular appetite suppressant, is widely used as an ingredient in many food supplements despite the fact that supporting scientific evidence is scarce. Recently alarming side effects of H. gordonii products (increased blood pressure and elevated pulse rate) have been reported. The aim of our study wa…
In this work, we report on white light generation by defect chemistry modification in a single-solid SnO2:Eu3+/Al-MCM-41 composite. The samples were carefully characterized by X-ray diffraction, transmission electron microscopy, N2 adsorption-desorption isotherms, UV-vis diffuse reflectance spectra and luminescence sp…
In this paper, we investigate the dynamics of vibrated granular suspensions by mechanical spectroscopy and multi-speckle diffusing wave spectroscopy (MSDWS), with the aim of relating microscopic dynamical mechanisms, at a grain scale, to the resulting macroscopic rheological behavior of the samples. Rheological experi…
Polyhydroxyalkanoates (PHAs) are especially interesting because of their similar properties to synthetic plastics and their potential use as biodegradable polymers. Many strategies have been employed to effectively and economically produce PHAs, among them a production process based on mixed microbial populations, enr…
The formation and growth of yttrium and ytterbium aluminium garnet (Y3−xYbxAl5O12, x = 0.0–3.0) nanoparticles in sub- and supercritical water have been followed by in situ synchrotron powder X-ray diffraction. At a pressure of 256 bar the formation of crystalline garnet nanoparticles occurs within seconds when the tem…
Thin films of CuO having an average thickness of 720 nm were deposited on clean glass substrates using the Aqueous Chemical Growth (ACG) method with Cu(NO3)2 and C6H12N4 as precursors and annealed at different temperatures in order to determine the effect of annealing temperature on their optical and solid state prope…