Magnetic Spinel Ferrite Nanoparticles from Microemulsions
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Beiträge zum Koordinationsverhalten von Oxidionen in anorganischen Feststoffen. IV [1] Darstellung, Kristallstruktur und spektroskopische Charakterisierung von NiP4O11 und CaNiP2O7
Abstract Durch Kristallisation aus der Schmelze werden Einkristalle von NiP 4 O 11 und CaNiP 2 O 7 erhalten. Diese erlauben Verfeinerungen der Kristallstrukturen (NiP 4 O 11 : C1¯ , Z = 8, a = 12, 753(4)Å, b = 12, 957(3)Å, c = 10, 581(4)Å, α = 89, 42(2)°, β = 116, 96(2)°, γ = 90, 20(2)°, R1 = 0, 027, wR2 = 0, 072 für…
Performance evaluation of polymeric insulators aged in lab and field
Multistress accelerated lab aging of polymeric insulators simulating actual stresses encountered in the field has the merit of reproducing the actual service environment in the lab. This permits a better understanding of the ongoing mechanisms related to aging and life expectancy of the insulators in service. This pap…
Recent Developments in Hard Magnetic Bulk Materials
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Synthese und Kristallstruktur von Vanadium(III)‐borophosphat, V2[B(PO4)3]
Abstract Synthesis and Crystal Structure of Vanadium(III) Borophosphate, V 2 [B(PO 4 ) 3 ] By reaction of boron phosphate, BPO 4 , and vanadium(IV)‐oxide, VO 2 , at 1050 °C a hitherto unknown vanadium(III)‐borophosphate is formed. Its composition was found to be V 2 BP 3 O 12 , its structure was elucidated by single c…
La estructura del perifiton y de la deriva algal en arroyos serranos
Se analiza la relación estructural entre perifiton y deriva algal, en la confluencia de arroyos serranos de diferente orden. Se realizaron muestreos mensuales durante un ciclo anual en cuatro sitios ubicados en el área de confluencia de los arroyos Piedra Blanca y San Bartolomé, de la cuenca alta del Río Chocancharava…
Al2O3-Coated Honeycomb Cordierite-Supported CuO for Simultaneous SO2 and NO Removal from Flue Gas: Effect of Na2O Additive
Effect of Na 2 O additive in an Al 2 O 3 -coated cordierite honeycomb ceramic-supported CuO catalyst on simultaneous SO 2 and NO removal activities was studied at 400 °C. Results show that SO 2 removal activity increases with increasing sodium loading from 0 to 2.0 wt % but decreases with further increasing sodium loa…
Non‐Isothermal Crystallization Behavior of Poly(trimethylene terephthalate) Synthesized with Different Catalysts
Abstract Summary: Non‐isothermal crystallization behavior of PTT resins synthesized with different catalysts was studied by using differential scanning calorimetry (DSC) and polarized light microscopy (PLM). The results showed that with the increase of the cooling rate, the crystallization temperature for poly(trimeth…
Impact of induction motor loads in system loadability margins and damping of inter-area modes
Induction motors constitute almost half of the total load in interconnected power systems. Static and dynamic data-files for large interconnected power systems do not usually contain ample representation of aggregate induction motor loads due to unfavorable cost-effectiveness: the low gains obtained in the quality of…
Extraction and Amplification of Genomic DNA from Human Blood on Nanoporous Aluminum Oxide Membranes
Purification of genomic DNA from biological samples is a requisite initial step in the performance of many molecular diagnostic assays. Traditional purification methods based on phenol–chloroform extraction and ethanol precipitation have been largely supplanted by adsorption and elution procedures based on silica and…
Substitution Effect by Deuterated Donors on Superconductivity in κ-(BEDT-TTF)2Cu[N(CN)2]Br
We investigate the superconductivity in the deuterated BEDT-TTF molecular substitution system $\kappa$-[(h8-BEDT-TTF)$_{1-x}$(d8-BEDT-TTF)$_x$]$_2$Cu[N(CN)$_2$]Br, where h8 and d8 denote fully hydrogenated and deuterated molecules, respectively. Systematic and wide range ($x$ = 0 -- 1) substitution can control chemica…
An ab Initio Study on the Effect of Carbon Surface Curvature and Ring Structure on N2(O2)−Carbon Intermolecular Potentials
The effect of carbon surface curvature and ring structure on the gas−carbon interaction potential is not well understood. Potentials derived from gas−graphite adsorption measurements are commonly used in molecular simulations with curved carbon surfaces, e.g., nanotubes, fullerenes, and other nanoporous carbons. Prese…
Sol–Gel Reaction Using DNA as a Template: An Attempt Toward Transcription of DNA into Inorganic Materials
Die topologisch unterschiedlichen Strukturen von Plasmid-DNA in Silicatstrukturen umzusetzen gelingt, wenn die DNA als Templat für eine Sol-Gel-Polykondensation von Tetraethoxysilan nach zwei Kationenaustauschschritten genutzt wird (siehe Schema). Aus diesen Befunden lässt sich folgern, dass die unterschiedlichen geor…
Effect of Water Sorption on the Flexural Properties of a Fully Biodegradable Composite
The water absorption process of the short-time process of a fully biodegradable composite is important in order to know the effect of water uptake on the mechanical properties before the polymer is hydrolysed. The matrix of the studied composites is a commercial blend based on starch and cellulose derivatives, named M…
Minor Hysteresis Loop in Fe Metal and Alloys
The minor hysteresis loops were measured with increasing magnetic field amplitude H a step by step and analyzed in Fe single crystal, polycrystalline metals and A533B steel. We have defined several new magnetic properties in the minor loops: they are pseudo magnetization B a * , pseudo coercive force H c * , pseudo re…
Effect of low substrate deposition temperature on the optical and electrical properties of Al2O3 doped ZnO films fabricated by ion beam sputter deposition
Aluminum (2 wt %) doped zinc oxide (AZO) films are prepared by ion beam sputtering method on glass substrates with very low substrate deposition temperature below 150 °C. The results of Hall effect measurements showed the decrease in resistivity (2.6×10−3–7.3×10−4 Ω cm) came from an increase in mobility and carrier co…
Ultrasonic Devulcanization of Carbon Black Filled Polyurethane Rubber
Following our success with the recycling of unfilled polyurethane rubber (PUR), an attempt was made to devulcanize carbon black (CB)-filled PUR. Although CB was added in various proportions, only samples with lower filler loading could be treated. Devulcanization experiments were carried out at various feed rates, gap…
Role of Ettringite in the Reuse of Hydrated Fly Ash from Fluidized-Bed Combustion as a Sulfur Sorbent: A Hydration Study
Waste from fluidized-bed combustion (FBC) has a low potential for reuse. One possibility for its recycling lies in a hydration process aimed at reactivating the SO 2 sorption ability of the unconverted lime. The formation of ettringite, as well as calcium hydroxide, in the hydrated FBC fly ash to be reinjected into th…
Commercial Flame Retardancy of Thermoplastic Polyesters – A Review
The review is focused on flame retardants known or believed by the authors to be in actual use or in serious development at the time of writing. Wherever possible, the information presented is supported by publications, conference papers, patents or product literature, and there was no intent to present proprietary in…
Pt2(HSO4)2(SO4)2, the First Binary Sulfate of Platinum
Abstract Red single crystals of Pt 2 (HSO 4 ) 2 (SO 4 ) 2 were obtained by the reaction of elemental platinum with conc. sulfuric acid at 350 °C in sealed glass ampoules. The crystal structure (monoclinic, P 2 1 / c , Z = 2, a = 868.6(2), b = 826.2(1), c = 921.8(2) pm, β=116.32(1)°, R all = 0.0348) shows dumbbell shap…