Materials Literature
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Asulphone-nitrogen containing heterocyclic ring, tetraphenylthiophene diamine (TPTDA) was prepared and used as curing agent together with triphenylphosphine (PPh 3 ) to cure diglycidyl ether of a bisphenol A-based epoxy resin (DGEBA). Activation energies (E a ) for curing DGEBA/TPTDA and DGEBA/ TPTDA/PPh 3 systems by…
In this paper we have reported the synthesis of luminescent nanoparticles of Zinc Sulfide (ZnS) with and without capping agent. Nanoparticles of ZnS are prepared by a coprecipitation reaction. Based on Ostwald ripening and surface passivation, we discuss a mechanism for the formation of ZnS nanoparticles. The reaction…
Severe restrictions imposed by the pollution control authorities on chromium have forced tanners to look for possible alternatives that are naturally abundant, easily obtainable, low priced, eco-friendly and offer competitive tanned leather performances. In this study, the interactions of vegetable and aluminum, with…
Abstract Formation and thermal stability of the Fe/ZnO(000‐1) interface have been studied by means of X‐ray photoelectron spectroscopy and low energy electron diffraction. The results indicated a pseudo 2D growth mode for iron on ZnO. In addition, it could be shown that under ultra high vacuum conditions deposited Fe…
Purpose: In this work, tension, impact, bend and fatigue tests were conducted in an AM60 magnesium alloy. The effects of environmental temperature and loading rates on impact and tension behavior of the alloy were also investigated. Design/methodology/approach: The tests were conducted using an Instron universal testi…
У статті розглядається проблема наступності, визнання наукових ступенів, звань, а також їх історичний розвиток в Україні а інших державах. Проаналізовано головні правила присудження наукових ступенів та порядок присвоєння вчених звань.
The residual charge method is expected to be a powerful tool to detect the water tree degradation of polymer insulated power cables. In this method, DC voltage is firstly applied to electrify the degraded region. Some of the charges would be deeply trapped and stayed stably, even after the DC voltage is removed and th…
The adaptive structures concept is of great interest in the aeronautical field because of the several benefits which can be accomplished in the design of future aircraft. Improvements in terms of aerodynamic efficiency, aero-elastic behaviour and manoeuvrability were proved by many international studies. The developme…
In efforts to increase the scanning speeds of the current state-of-the-art IC chip manufacturing process, immersion lithography, the present work investigates the liquid wetting effects of oriented surface nanopatterns with varying depth. In this set of experiments, both static and forced dynamic contact line behavior…
The deoxidation behavior of NiTi alloy melts with metallic barium was investigated. Metallic barium was added to the NiTi alloy melts held in lime (CaO) crucibles at 1673 K, and the concentrations of oxygen, barium and calcium in the melts were quantitatively measured. The oxygen content in a raw NiTi alloy bar was 66…
Series of binuclear copper and nickel complexes having two tetradental enaminoketone centres have been synthesized and examined. The rectangular shape of the mesogenic core allows the formation of lamellar (SmA) or columnar (Colh, Colr) phases depending on the number of attached aliphatic chains. In some complexes the…
Nanomaterials, including nanoparticles, nanowires, nanotubes etc., are the object of much well deserving attention by researchers and the public alike. Because of their novel properties associated with their typically large surface to volume ratios and finite- or quantum-size effects, they offer an avenue of explorati…
A simplified expression for the eddy current loss in laminated rectangular core is obtained using linear electromagnetic field analysis. The treatment takes cognizance of current interruption phenomena, by considering capacitive effects of insulation regions. Analysis presented in this paper assumes identical field di…
Here, we report, for the first time, the formation of a new thermoreversible organogel based on self-assembly of oleic acid (OA) and hexadecylamine (HDA) in ethylene glycol (EG) with addition of NaOH; this gelator can act as a template and carbon source for synthesis of Sn nanoparticles encapsulated in carbon.
Core/shell capsules composed of calcium carbonate whisker core (rod‐like shape) and chitosan/chitosansulfate shell were prepared by the layer‐by‐layer deposition technique. Two chitosan samples of different molecular weights ( M w = 9.7 × 10 4 and 1.09 × 10 6 g · mol −1 ) were used as original materials. Hollow capsul…
This study demonstrates a novel tunable grating based on a stressed liquid crystal (SLC) film. This device can be modulated by shearing a length or applying an AC voltage to tune the intensity and polarization of diffracted beams. The device capable of tuning the intensity and/or polarization of diffracted beams is es…
En dos sistemas lóticos del páramo de Santurbán, durante lluvia y sequía, se seleccionaron tres tramos de muestreo: nacimiento, zona media y río, evaluando en cada tramo la influencia de las variables ambientales en la estructura del ensamblaje de diatomeas perifíticas. Un nálisis de componentes principales evaluó la…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Yuri A. Pishchalnikov, James A. McAteer, Irina V. Pishchalnikova, James C. Williams, Michael R. B…
The possibility of modifying the structure and properties of fibrous papermaking pulps with bacterial cellulose was investigated. For this purpose, three ways of obtaining specific composites were developed. The first one consisted in making the biosynthesis of bacterial cellulose in Acetobacter xylinum culture in the…
In-situ high-resolution electron microscopy is a modern and powerful technique in materials research, physics, and chemistry. In-situ techniques are hardly treated in textbooks of electron microscopy. Thus, there is a need to collect the present knowledge about the techniques and achievements of in-situ electron micro…