Concerning Lewis Acid–Base Theory for Proton Transfer
The author offers counterpoint commentary in response to Shaffer's suggestion that the Lewis acid–base approach be applied to reactions such as ammonia–water and HCl–water.
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Effect of yarn twist on wicking of cotton interlock weft knitted fabric
The effect of yarn twist on the wicking rate of cotton interlock weft knitted fabrics has been studied. It is observed that using the yarn linear density of 30tex, the wicking rate decreases with an increase in the amount of yarn twist. An equation ‘h=cT+d’ is found to be a good estimate of the maximum wicking height…
Crystal structure of bis(2,2′-bipyridine-N,N′)dibromomanganese(II), MnBr2(C10H8N2)2
Article Crystal structure of bis(2,2′-bipyridine-N,N′)dibromomanganese(II), MnBr2(C10H8N2)2 was published on September 1, 2007 in the journal Zeitschrift für Kristallographie - New Crystal Structures (volume 222, issue 3).
Photoinduced Self-Assembly of Au–Ag–Hg Trimetallic Nanoparticles During Their Synthesis from Gold Seeds in Glycine Solution
This paper describes how irradiation with light influences the preparation of Au-Ag-Hg trimetallic nanoparticles (NPs) from gold nanorods (AuNRs) in glycine solutions (pH 8.5-10.5). Silver, gold, and mercury ions were reduced by ascorbic acid and deposited on AuNRs to form Au-Ag-Hg trimetallic NPs of different sizes a…
Preparation and characterization of aluminosilicate supports with a synthesized layer of catalytic filamentous carbon: I. Synthesis of carbon nanofibers on a supported nickel catalyst
The synthesis of catalytic filamentous carbon (CFC) on a Ni catalyst supported by homogeneous precipitation onto the surface of aluminosilicate ceramic supports (honeycomb monoliths, ceramic foam, glass foam, and haydite) was studied. The effects of CFC synthesis conditions (the catalyst concentration on a support, th…
Lipase Catalyzed Chemoselective Ring‐Opening Polymerization of ϵ‐Caprolactone in Presence of γ‐Hydroxy‐α‐methylenebutyric Acid
The ring‐opening polymerization (ROP) of ϵ‐caprolactone (CL) using γ‐hydroxy‐α‐methylenebutyric acid (HMBA) as the initiator was studied. The use of stannous octoate (Sn(Oct)2) and Novozym 435 (Lipase B from Candida Antarctica) as catalysts was compared. Under enzymatic conditions, poly(ϵ‐caprolactone) (PCL) with well…
The oxidation of molybdenum sulphide concentrate with water vapour Part 2 – Macrokinetics and mechanism
The oxidation of molybdenum sulphide concentrate by water vapour at high temperatures has been investigated experimentally. The progress of the reaction was followed by a thermogravimetric analysis unit and the exit gas was analysed to determine its composition. The conditions under which the water vapour oxidation pr…
Thermal Oxidation Kinetics of Unvulcanized Unstabilized Polyisoprene
Abstract The thermal oxidation of an unvulcanized, unstabilized polyisoprene rubber (IR) has been studied in the 40–140 °C temperature range. Ageing was monitored by FTIR determination of double bonds and carbonyl groups, mass uptake measurement, and weight average molar mass determination. A mechanistic scheme based…
Measuring shear viscosity using correlations
Measurements of transverse momentum fluctuations can be used to determine the shear viscosity [1]. We use current data to estimate the viscosity-to-entropy ratio in the range from 0.08 to 0.3, and discuss how future measurements can reduce this uncertainty.
AN EVALUATION OF POTENTIAL LINER MATERIALS FOR ELIMINATING FCCI IN IRRADIATED METALLIC NUCLEAR FUEL ELEMENTS
Metallic nuclear fuels are being looked at as part of the Global Nuclear Energy Program for transmuting longlive transuranic actinide isotopes contained in spent nuclear fuel into shorter-lived fission products. In order to optimize the performance of these fuels, the concept of using liners to eliminate the fuel/clad…
Surface Coating and Metal-Based Organic Additives—Approaches for FRSS PVC Cables
Polyvinyl chloride (PVC) is one of the most widely used polymers today. One of its major applications is in electrical and control cables. Although PVC is intrinsically self-extinguishing, it supports flame spread along its length because of the additives used during processing. The spread of fire along electrical cab…
Crystallography of craniid brachiopods by electron backscatter diffraction (EBSD)
ABSTRACT Electron backscatter diffraction (EBSD) is used to determine the detailed crystallographic orientation of calcite crystals of craniid brachiopods in the context of shell ultrastructure. Sections of shells of two Recent species, Novocrania anomala and Novocrania huttoni , are analysed to provide 3D crystallogr…
Peculiarities of structurization and properties of nonisocyanate epoxyurethane polymers
Peculiarities of the synthesis of crosslinked epoxyurethane polymers prepared by two main reactions such as “cyclic carbonate-amine” with the formation of linear hydroxyurethane fragments and “epoxide-diamine” to form crosslinked polymer are considered. It is shown that the acidolysis of cyclic carbonate proceeds by t…
Theoretical evaluation of warp tension variations during weaving process
The relationship between the ratio of the applied force on warp yarn by backrest roller to the warp tension, and the radius of backrest roller, the vertical position of backrest roller and the horizontal position of backrest roller with variations in warp beam radius during weaving process has been studied. The optimu…
MORPHOLOGICAL AND STRUCTURAL CHARACTERIZATION OF POLY(3-DECYLTHIOPHENE) PREPARED BY ELECTROPOLYMERIZATION USING 1-BUTYL-3-METHYL-IMIDAZOLIUMTETRAFLUORBORATE AS SOLVENT
In this paper, we report the electrochemical polymerization of 3-decylthiophene at room temperature using the 1-butyl-3-methylimidazoliumtetrafluorborate as solvent. The polymer film is electroactive and its morphology depends upon the anode used. The polymerized 3-decylthiophene was characterized by ft-infrared, uv-v…
Computer simulation of crack formation in a nickel bicrystal nanowire containing a wedge disclination
Crack formation in a nickel bicrystal wire of radius 16 nm with a negative junction disclination lying along the axis has been studied by computer simulation. It has been revealed that at a disclination strength exceeding some critical value (approximately 17°), a crack is formed in the region of the disclination core…
Available Nitrogen for Corn and Winter Cereal in Spanish Soils Measured by Electro‐ultrafiltration, Calcium Chloride, and Incubation Methods
Comparison of methods is necessary to develop a quick and reliable test that can be used to determine soil‐available nitrogen (N) in an attempt to increase the efficiency of N fertilizers and reduce losses. The objectives of this research were to compare the fractions extracted by the calcium chloride (CaCl2) and the…
Driving Force of an Iron Particle's Movement in Solid-Phase Graphitization
Solid-phase graphitization, and thus solid-phase nanotube growth, was induced by the movement of iron particles into an amorphous carbon matrix at a certain temperature around 600 °C. We analyzed this iron particle movement in an amorphous carbon wall by in situ monitoring by scanning transmitted electron microscopy (…
Mechanical Properties of Single Carbon Nanofibers Grown on Tips of Scanning Probe Microscopy Cantilevers by Ion Irradiation
Single carbon nanofibers (CNFs) grown on the tips of scanning probe microscopy (SPM) cantilevers by Ar + irradiation attract much attention, because of their potential in the batch fabrication of CNF probes. Here, we first revealed their mechanical characteristics. An excellent flexibility of CNF probes was confirmed…
THE SAFETY AND EFFICACY OF DRESSINGS WITH SILVER – ADDRESSING CLINICAL CONCERNS
Dear Sirs The authors (1) are to be commended for drawing the attention of the readers the very important topic of reducing wound bioburden with topical silver compounds and silver-impregnated dressings. As rightly stated, silver is ideally suited as a topical antibacterial and antifungal agent. In fact, silver compou…