Materials Literature
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Nanocomposites were prepared by in situ intercalative polymerization of acrylamide/acrylic acid in presence of fuller’s earth. Agro- and food industry wastes, sugarcane bagasse and chitin, respectively were used as reinforcing/ adsorbent materials. Effect of γ-radiation on adsorption characteristics of nanocomposites…
In this study, nanoscale PbO2 was obtained by the hydrolysis reaction of Pb(CH3COO)4 in an ethanol solution, and the conventional PbO2 was prepared by the electrolytic oxidation of PbO powder in a H2SO4 solution. The former PbO2 was identified as single phase β-PbO2 with the average crystallite size of about 12 nm tha…
The diffusion coefficients of simple chain models are analyzed as a function of packing fraction, η, and as a function of a parameter C that is the density raised to a power divided by temperature to look at scalar metrics to find master curves. The central feature in the analysis is the mapping onto an effective hard…
Recently, an extraction of la metallofullerenes from soot using 1,2,4-trichlorobenzene has been reported for La@C80 and La@C82. In both cases, the cages were derivatized by the solvent (forming La@C80-C6H3Cl2 and La@C82-C6H3Cl2) and the following X-ray analysis disclosed rather unexpected cages: C80(C 2v ;3) and C82(C…
The present study summarizes the occurrence, distribution and autecology of 12 taxa of the class Cyanophyceae collected from several swamps, reservoir and highland wetlands in South Korea from 2009 to 2012. A new species, Anabaena koreana sp. nov. and 11 taxa of blue-green algae newly recorded are described and illust…
Abstract 1,3-Bisarylated-2,2′-biazulene 1 and 1,1′-bisarylated-2,2′-biazulene 1′ were obtained by the Suzuki–Miyaura cross-coupling reaction of 1,1′,3,3′-tetrahalo-2,2′-biazulene 2 with 4-tert-butylphenylboronic acid (3b). The other two halogen atoms were reductively removed by hydrogenation under the same reaction co…
La escasez de estudios en zonas rurales impide que las autoridades sanitarias gestionen los recursos pertinentes para crear estrategias que les permitan efectuar sus operaciones de manera eficaz y eficiente. Esto conduce a la creación de sistemas de sanidad limitados y a la degradación del ambiente por el manejo inade…
Free electrons, produced in radio-frequency (13.56 MHz) glow discharges of O2, N2, and Ar, are recruited to multi-walled carbon nanotubes (MWNTs) by a positive electric field. Electron bombardment degradation is restricted to the tips of the MWNTs. SEM images show that a surface deposited layer develops during degrada…
By using a semi-efficient sulphur accelerated vulcanization system, an investigation of the effect of alkanolamide on cure characteristics and hardness properties of kaolin-filled natural rubber compounds was carried out. Alkanolamide was synthesized from Refined Bleached Deodorized Palm Stearin (RBDPS) and diethanola…
Metal pollution is a growing problem and microbes have adapted to tolerate the presence of metals and even use them. The investigation was carried out to screen for bisorption property of metals by bacteria and check for correlation between tolerance to heavy metals and antibiotic resistance. Soil samples were collect…
Taxa in the order Chlorococcales inhabiting Hongcheon River, South Korea were collected and identified from December 2011 to September 2012. As a result, nine taxa in the Order Chlorococcales including unrecorded genera Oocystidium and Heleococcus were newly added to the Korean flora: Oocystidium ovale, Heleococcus mu…
Titanium dioxide mediated semiconductor, nickel sulfide (NiS2) doped graphene photocatalysts were prepared by simple hydrothermal method for the treatment of dye contaminated aqueous solutions. The characterizations of synthesized composites were studied by X-ray diffraction, scanning electron microscope, transmission…
The effects of five catalysts on the oxidation rate of ammonium sulfite were compared by intrinsic experiments using self-designed bath reactor. Fe2+ was turned out to be a good catalyst for oxidation of ammonium sulfite. Using stirred bubbling reactor, the kinetics of catalytic oxidation of sulfite in the ammonium-ba…
The reaction engineering approach (REA) is examined here to investigate its suitability as the local evaporation rate to be used in multiphase drying. For this purpose, REA is first implemented to model the convective drying of materials with various thicknesses. The relative activation energy, as the fingerprint of R…
Highly photoluminescent ZnSe/Au nanocomposites have been prepared via a simple low-temperature-aqueous synthesis and direct coupling approach. The mechanism of surface plasmons enhanced photoluminescence of ZnSe/Au nanocomposites is investigated. Furthermore, due to high photostability and biocompatibility, the as-pre…
A systematic study about the effect of different electrolyte concentrations (KOH 2M, 4M, 6M and 8M) at 293 K on the electrochemical properties of Ti 12 Zr 21.5 V 10 Ni 38.4 Cr 4.5 Mn 13.6 AB 2 -type alloy was performed. This alloy can be used as active material of the negative electrode of nickel-metal hydride batteri…
The behavior of gold chloride (AuClx) encapsulated within the inner space of a single-wall carbon nanotube (SWCNT) was investigated under electron beam (e-beam) irradiation and high temperatures. Analysis of the pristine specimen by transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), an…
Various glycidates were obtained in high yields via green oxidation of acrylates with aqueous solution of NaOCl in the presence of ammonium salts.The appropriate choice of ammonium salts fitting to the polarity of the substrates and the reaction under slightly basic conditions were essential for efficient reactions.Fa…
This brief summary provides an overview of a recent National Academies (NA) report on the topic of cancer risks in populations living near U.S. nuclear power plants and facilities. The initial NA Phase I report describes general issues involved in providing scientifically valid descriptions of these risks, suggests tw…
Using synthetic chemical approaches, it is now possible to synthesize transition metal carbides nanoparticles with morphology, where the transition metal layers are embedded with intervening layers of carbon atoms. A composite material consisting of Co2C and Co3C nanoparticles has been found to exhibit unusually large…