Materials Literature
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The energy band structure of mechanically free and compressed LiRbSO4 single crystals is investigated. It is established that the top of the valence band is located at the D point of the Brillouin zone [k = (0.5, 0.5, 0)], the bottom of the conduction band lies at the Γ point, and the minimum direct band gap E g is eq…
The COMET concept is developed to cool an ex-vessel corium melt, in case of a hypothetical severe accident leading to vessel melt-through, by passive injection of coolant water to the bottom of the melt. An advanced version of this concept (CometPCA) uses a porous concrete layer from which the water is supplied to the…
The performance of a battery powered, forced air distribution system for ventilation under protective clothing (torso body armor) was evaluated on a sweating thermal manikin in a 35°C and 50% RH environment. The ventilation system, delivering 9 L•s-1 of ambient air increased the heat loss from the manikin by 45 W. Mea…
Today reliability is one of the serious requirements of electronic systems, and, using that, the number of system failures, repair cost, guarantee, etc are estimated by this factor. In this paper, the reliability of a switching power supply (SMPS) is evaluated and the effect of the type of transformer winding on the r…
The mineral and microelement compositions of urinary stones from patients in various districts of the Novosibirsk region are analyzed. The mineral composition is determined using X-ray powder diffraction and vibrational spectroscopy. The microelement composition is identified using synchrotron radiation X-ray fluoresc…
Abstract Organic conductors containing supramolecular assemblies have been obtained from the galvanostatic oxidation of donor molecules with iodine-bearing neutral molecules and halide anions. For the obtained single crystals, X-ray crystal structure analyses along with electrical and magnetic measurements were carrie…
For the first time, using a method of direct interaction of crownphthalocyanine and cerium(III) acetate in the presence of strong organic base, a sandwich-type double-decker cerium(IV) bis[tetra-(15-crown-5)-phthalocyaninate] [ Ce 4+ ( R 4 Pc 2− ) 2 ] 0 ( R 4 Pc 2− = [4,5,4',5',4″,5″,4‴,5‴-tetrakis-(1,4,7,10,13-pentao…
Evolution of the crystalline structure of cementite that was formed in contact with α -Fe upon heat treatments of a mechanically alloyed iron-amorphous Fe-C phase nanocomposite has been studied using X-ray diffraction and Mössbauer spectroscopy.
The results of the study on degradation of selected synthetic polyesters namely poly(L-lactide) (PLLA), poly[(DL)-lactide] (PLA) and aliphatic - aromatic co-polyester terephthalic acid/ adipic acid/1,4-butanediol (BTA) in the industrial compost heap, a compost containing activated sludge, standardized soil or dynamic…
Decellularized allograft tissues have been identified as a potential extracellular matrix scaffold for tissue-engineered vascular substitutes. In order to improve the thromboresistance, it is necessary to pre-coat the intra-luminal vessel surface. Recently a new surface modification technique appeared, based on the al…
Single crystals of Cs 2 K 2 [Pt 12 O 8 (SO 4 ) 12 ] (R3̄, Z = 3, a = 1198.9(3), c = 2768.9(9) pm, R all = 0.1154) were obtained by the reaction of Cs 2 [Pt(NO 2 ) 4 ], K 2 [Pt(NO 2 ) 4 ] and conc. sulfuric acid at 400 °C in a sealed glass ampoule. The compound contains the cluster anion [Pt 12 O 8 (SO 4 ) 12 ] 4− . It…
It is known that sintering of powders of zinc oxide (ZnO) with small additions of iron oxide results in a ceramic with grains exhibiting a characteristic inversion domain micro-structure with planar inversion domain boundaries (IDBs) on two different habit planes. This study concentrates on a quantitative analysis, by…
The Young’s and torsion moduli of single-layer carbon ( m , 0) and ( m, m ) nanotubes are studied. It is demonstrated that both moduli depend on the chirality, diameter, and length of the nanotube. It is found for the first time that the torsion modulus increases with the nanotube diameter and diminishes with an incre…
Abstract The self assembly of PLA enantiomers have been studied at the nanometer scale using atomic force microscopy. At first, the conformation of D and L PLA macromolecules in dilute regime and the initial state of aggregation of both enantiomers were successively observed and compared with the aggregation of PLLA/P…
A corona discharge in a system with a multipoint electrode is studied. The conditions for maximizing the limit current manifesting the corona-spark transition are found.
An automated carbon nanotube (CNT) microspotting system was developed for rapid and batch assembly of bulk multiwalled carbon nanotubes (MWNTs)-based microelectromechanical system sensors. By using the dielectrophoretic and microspotting technique, MWNT bundles were successfully and repeatedly manipulated between an a…
Nowadays, synthetic biodegradable polymers, such as aliphatic polyesters, are largely used in tissue engineering. They provide several advantages compared to natural materials which use is limited by immunocompatibility, graft availability, etc. In this work, poly(L-lactic) acid (PLLA), poly(DL-lactic) acid (PDLA), po…
Abstract magnified image A series of π‐aryl/heteroaryl conjugated coumarin‐thiazole systems 8a‐f has been synthesized by using Hantzsch thiazole protocol and Wittig olefination as the keys. In the UV‐Visible spectra of 8a‐f , a main absorption band associated with a dominant π‐π* transition is observed in the region o…
X-ray diffraction patterns showed that crystallinity of the annealed ZnO films was improved by thermal annealing. Transmission electron microscopy images showed that columnar structures were preferentially formed in ZnO thin films due to thermal annealing, and electron energy loss spectroscopy images showed that annea…
The growth temperature dependence of the interface perfection of full Heusler alloy Co2FeSi∕GaAs(001) hybrid structures have been examined using transmission electron microscopy (TEM) and high-resolution x-ray diffraction (HRXRD). The film grown at 100°C shows an atomically abrupt interface without interfacial reactio…