Materials Literature
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BACKGROUND: Contrast enhanced cardiovascular magnetic resonance (CMR) with T1 mapping enables quantification of diffuse myocardial fibrosis. Various factors, however, can interfere with T1 measurements. The purpose of the current study was to assess the effect of co-medication with a typical protein binding drug (ibup…
The aim of this study was to design a new Drug Delivery System (DDS) based on poly (lactide–co–glycolide) (PLGA) biodegradable nanospheres (NS) coated with Chitosan (CTS), in order to prolong its residence time and to deliver the nanoparticles more specifically to cancer cells. We have tried three methods of incorpora…
The first comprehensive theoretical investigation of a series of functionalized fullerene cations, {R-C(60)}(+), where R = H, CH(3), CH(2)Cl, CHCl(2), and CCl(3), is accomplished. A detailed consideration of conformational energetic profiles of these systems resulted in the structures of most stable conformers that fi…
Biopolymers from renewable resources are of interest for packaging applications as an alternative to conventional petroleum-based polymers. One of the major application areas for biopolymers is foo ...
Solid solutions of Ba 1-x Sr x TiO 3 (BST) type are very attractive for application in information technology, but also in microwaves for such electrically controlled devices as phase shifters, tunable filters, steerable antennas, varactors, etc. In the present study thin films of a BST solid solution with x = 0.4 (BS…
Rings of Ti-6Al-4V with aspect ratios (wall thickness:axial length) of 1 : 1, 1 : 2 and 1 : 4 have been expanded to failure at radial strain rates εr ∼ 1 × 104 s−1 using 4340 (EN24T) steel and Cu-ETP cylindrical drivers containing a column of RDX. Expansion velocity was measured using VISAR enabling calculation of the…
A new method of obtaining a ZnO-SiO2 synthetic composite from emulsion systems is described. The reagents were solutions of sodium silicate and zinc sulphate, cyclohexane was used as an organic solvent and non-ionic surfactants as modifiers. The influence of the mode of reagents dosing and type of emulsifiers on the p…
Conductivity dopants with processing properties suitable for industrial applications are of importance to the organic electronics field. However, the number of commercially available organic molecular dopants is limited. The electron acceptor 2,3,5,6-tetrafluoro-7,7,8,8,-tetracyanoquinodimethane (F4-TCNQ) is the most…
The analysis of the primary crystallization of wear corrosive-erosive high chromium cast steel was introduced in the article on the basis of investigations the widened method of the differential thermal analysis with testers DTA-C and DTA-Is. The use of these testers enabled the analysis of crystallization for the var…
To determine the effect of fluoride ingested during the development period on the number of odontoblast cells using stereological methods. Materials and methods: A total of 56 freshly extracted primary first and second molar teeth were used, obtained from children (aged between 9 and 11 years) requiring dental extract…
For decades, conventional amour shield is mainly oriented on metallic materials which are today well-known. Since the use of non conventional threats as IEDs, performances of those protections are required to be upgraded. The expected improvements that manufacturers are looking for are mainly oriented to the weight re…
In our study, the antibacterial activity of the series of chitosan against gram negative bacterium E. coli DSMZ 498 and gram positive bacterium Micrococcus lutues ATCC 9341 were evaluated by zone of inhibition test.
In this work, various tensile tests, including Brazilian disc test (BDT), flattened Brazilian disc (FBD) test and semi-circular bending (SCB) test, were carried out on a highly particle-filled composite by using a split Hopkinson pressure bar (SHPB). With the consideration of low strength and low wave impedance of the…
The kinetics of oxidation of amitriptyline by potassium permanganate in aqueous sulphuric acid medium at 298K and at a constant ionic strength of 0.20 mol dm-3 has been investigated spectrophotometrically. The reaction exhibits 5:4 stoichiometry (5 Amitriptyline:4 KMnO4). The reaction was first order with respect to m…
In this study, a noncytotoxic fibrous dressing material was developed using an activated carbon nonwoven, directly overlaid with dibutyrylchitin fibres by electrospinning. This dress ing material is designed for wounds that are hard to heal. Its sorption capacity is imparted by highly adsorptive carbon fibres; when me…
Pb[ZrxTi0,95-x(Mo1/3In2/3)0.05]O3 piezoelectric ceramics with varying Zr/Ti ratio were prepared by the conventional method of thermal synthesis of mixed-oxides.the samples structures was determined by X-ray diffractometry to demonstrate the co-existence of the tetragonal and rhombohedral phases. In the present system…
Abstract—This article is devoted to the construction and investi-gation of a class of polarization-invariant directional cloaks by con-catenation of cloaking medium components via transformation optics. It improves the construction of the first polarization-invariant direc-tional cloak, introduced by Agarwal et al. [1…
Rectangular grid-shaped bismuth sulfide planar networks, which consist of crossed bismuth sulfide single-crystalline nanorods, were easily synthesized in good yields here through a simple hydrothermal process. We investigated the oriented attachment growth process of nanorods and nanofabrics in detail by temporal evol…
The life and the performance of an insert in metal cutting are mainly dependent on the heat that is generated in the contact zones on the tool rake face with chips and on the flank face with the transient and machined surfaces. According to tool life standard, the wear on the flank face is usually taken as a decision…
Cellulose micro- and nanofibers were produced on a base of pulp obtained as a result of thermal-mechanical and chemical pretreatment of hemp straw. Isolation of micro-and nanofibres was carried out using the enzymatic treatment with the use of a cellulolytic complex of Aspergillus niger and two-stage enzymatic and mec…