Materials Literature
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Abstract Ethylene oxide catalyst is a high metal loading catalyst, in which silver crystals is impregnated on α‐Al 2 O 3 support. In this type of catalyst, metal dispersion plays an important role on catalyst selectivity for desired products. In this work, silver nitrate and silver oxide together with oxalic and lacti…
We perform an analysis of the experimentally known temperature dependence of the staggered magnetization in the antiferromagnetic phase. This analysis allows us to put an upper limit on the unknown value of the spin-wave velocity along the stripes of equal spin direction (spin stripes). The velocity is about ten times…
This study examined the miscibility, mechanical and thermal properties of melt-mixed blends of PTT(poly(trimethylene terephthalate)) with PP(isotatic polypropylene). DMA and SEM results indicated that the PTT/PP blends are immiscible. Revealed from TGA analyses, the blends with a higher PP content showed a higher degr…
Diblock copolymers blended with homopolymer may self-assemble into spherical, cylindrical, or lamellar aggregates. Transitions between these structures may be driven by varying the homopolymer diblock molecular weight or composition. Using self-consistent field theory (SCFT), we reproduce these effects. Our results ar…
Abstract Isotactic polypropylene‐vapor grown carbon nanofiber composites containing various fractions of carbon nanofibers, ranging from 0 to 20 wt %, have been prepared. Raman spectroscopy was used to analyze the effect of the dispersion of carbon nanofibers within polypropylene and the interactions between carbon na…
The effect of hydrogen peroxide and frequency on the degradation of phenol was investigated in this study. The concentrations of phenol and hydrogen peroxide were 0.05 and 0.0018 mM, respectively. When a high frequency of sonication (1 MHz) was irradiated to a phenol solution, the efficiency of decomposition of phenol…
The spectrum of multi-bubble sonoluminescence (MBSL) from alkali-metal aqueous solutions consists of continuum emission and line emission from alkali-metal atoms. We performed spatiotemporal separation of the two types of emission to investigate origin of the emissions. Images of MBSL at 137 kHz from NaCl solution tak…
The translocation of folded proteins via the twin-arginine translocation (Tat) pathway is regulated to prevent the futile export of inactive substrate. DmsD is part of a class of cytoplasmic chaperones that play a role in preventing certain redox proteins from premature transport. DmsD from Escherichia coli has been c…
Insufficient kinetic stability of exoinulinase (EI) restricts its application in many areas including enzymatic transformation of inulin for production of ultra-high fructose syrup and oligofructan, as well as fermentation of inulin into bioethanol. The conventional method for enzyme stabilization involves mutagenesis…
Adenylate kinases (AKs; EC 2.7.4.3) are essential members of the NMP kinase family that maintain cellular homeostasis by the interconversion of AMP, ADP and ATP. AKs play a critical role in adenylate homeostasis across all domains of life and have been used extensively as prototypes for the study of protein adaptation…
Studies have proved that increasing polymer matrices by carbon nanotubes to form structural reinforcement and electrical conductivity have significantly improved mechanical and electrical properties at very low carbon nanotubes loading. In other words, increasing polymer matrices by carbon nanotubes to form structural…
IR luminescence and optical gain in a Pb-doped fiber have been observed for the first time. Absorption, luminescence and pump on/pump off optical gain spectra, as well as luminescence decay time, have been measured in these fibers. Comparison of optical active center characteristics in Pb-doped and Bi-doped fibers of…
A new method for the self-assembly of a carbon nanotube (CNT) using magnetic capturing and fluidic alignment has been developed and characterized in this work. In this new method, the residual iron (Fe) catalyst positioned at one end of the CNT was utilized as a self-assembly driver to attract and position the CNT, wh…
The agitation effects on sonochemical reaction were investigated using a sonochemical reactor at 486 kHz. Agitator type, rotation speed, and ultrasonic irradiation direction were changed and the sonochemical reaction performances of aqueous solutions of potassium iodide (KI) and tetraphenylporphine tetrasulfonic acid…
In many industrial applications, inadequate cell attachment can be a limitation, especially when serum-free media are used. Nitrogen-rich plasma-polymerised ethylene (PPE:N) exhibits high concentrations of polar groups that can help to promote the attachment of weakly adherent cell types. Tissue plasminogen activator-…
As part of a systematic investigation for a number of Fe(II) porphyrin complexes used as biomimetic models for cytochrome P450, crystals of the title compound, [K(C(18)H(36)N(2)O(6))][Fe(II)(C(64)H(64)N(8)O(4))(HS)], were prepared. The compound exhibits a non-planar conformation with major ruffling and saddling distor…
A novel and flexible experiment is reported for investigation of the non-equilibrium melting behaviour of model crystals made from charged colloidal spheres. In a slit geometry, polycrystalline material formed in a low salt region is driven by hydrostatic pressure up an evolving gradient in salt concentration and melt…
We report a macromolecular end-capping approach to improve the detection sensitivity of cationic conjugated polymer (CCP) based DNA detection. A phenylethynyl anthracene (PEA) end-capped cationic polyfluorene (PF) derivative (P1) is synthesized via Suzuki coupling. Due to efficient fluorescence resonance energy transf…
The effects of processing parameters such as processing pressure, temperature, mixing time and rotor speed on polyvinyl chloride foams were investigated by using a novel microcellular foaming setup. The experimental results show that a proper temperature and a high pressure can promote CO2 dissolving in polymer, which…
The solubilities of penicillin sulfoxide in ethyl acetate, 4-methyl-2-pentanone, butyl acetate, and toluene from (273.15 to 332.75) K were measured with the mole fraction by a gravimetric method The solubilities in these solvents are temperature dependent. The results show that the solubility of penicillin sulfoxide i…