RETRACTED: Vorotilo et al. Manufacturing of Conductive, Wear-Resistant Nanoreinforced Cu-Ti Alloys Using Partially Oxidized Electrolytic Copper Powder. 2020, , 1261.

The Editorial Office retracts the article, "Manufacturing of Conductive, Wear-Resistant Nanoreinforced Cu-Ti Alloys Using Partially Oxidized Electrolytic Copper Powder" [...

The Effect of Dopants on Structure Formation and Properties of Cast SHS Alloys Based on Nickel Monoaluminide.

Alloys based on NiAl-Cr-Co () with complex dopants () were fabricated by centrifugal SHS metallurgy. The phase and impurity compositions, structure, mechanical properties, and the mechanism of high-temperature oxidation at T = 1150 °C were studied; the kinetic oxidation curves, fitting equations and parabolic rate constant were plotted. AlO and CoCrO were the major phases of the oxidized layer.

The Effect of Copper on the Microstructure, Wear and Corrosion Resistance of CoCrCuFeNi High-Entropy Alloys Manufactured by Powder Metallurgy.

This paper focuses on the microstructure, phase composition, mechanical, tribological and corrosion properties of high-entropy alloys (HEAs) in the CoCrCuFeNi system depending on copper content, which was varied from 0 to 20 at. % with an increment of 5%. CoCrCuFeNi alloys were manufactured by powder metallurgy methods: mechanical alloying and hot pressing of element mixtures.

Prevalence and Risk of Dental Erosion in Patients with Gastroesophageal Reflux Disease: A Meta-Analysis.

Aim: The present paper aims to systematize data concerning the prevalence and risk of dental erosion (DE) in adult patients with gastroesophageal reflux disease (GERD) compared to controls.

Materials And Methods: Core electronic databases, i.e.

[Comparative evaluation of the shear bond strength of a universal adhesive system in different etching modes and a total etch adhesive system].

Objective: To determine a comparative evaluation between the shear bond strength (SBS) of total etch adhesive system and the SBS of universal adhesive system in various etching techniques.

Material And Methods: There were made 60 sections of teeth for the laboratory research. The studied samples had been divided into 4 groups (15 samples in each group).

Structure and Properties of Heat-Resistant Alloys NiAl-Cr-Co- ( La, Mo, Zr, Ta, Re) and Fabrication of Powders for Additive Manufacturing.

The NiAl-Cr-Co- alloys were produced by centrifugal self-propagating high-temperature synthesis (SHS) casting. The effects of dopants = La, Mo, Zr, Ta, and Re on combustion, as well as the phase composition, structure, and properties of the resulting cast alloys, have been studied. The greatest improvement in overall properties was achieved when the alloys were co-doped with 15% Mo and 1.

Manufacturing of Conductive, Wear-Resistant Nanoreinforced Cu-Ti Alloys Using Partially Oxidized Electrolytic Copper Powder.

Reactive powder composites Cu-(0-15%)TiH containing up to 5% native CuO were manufactured by high energy ball milling and then hot-pressed to produce bulk nanostructured copper-matrix alloys reinforced by CuTiO inclusions. Two high-energy ball-milling (HEBM) protocols were employed for the fabrication of Cu-Ti alloys: single-stage and two-stage ball milling, resulting in an order of magnitude refinement of TiH particles in the reactive mixtures. Single-stage HEBM processing led to the partial retention of Ti in the microstructure of hot-pressed specimens as the α-Ti phase and formation of fine-grained (100-200 nm) copper matrix interspersed with 5-20 nm CuTiO precipitates, whereas the two-stage HEBM led to the complete conversion of TiH into the CuTiO phase during the hot pressing but produced a coarser copper matrix (1-2 μm) with 0.

[Site-specific restrictases from Bacillus thuringiensis var. Kumantoensis].

The efficiency of bacteriophages CP-54 and CP-55 plating on Bacillus thuringiensis var. kumantoensis H18 (Kum) is decreased about 10-fold as compared with the efficiency of plating on Bacillus thuringiensis var. galleriae H5 (Gal).

[The immune status of the population of the Crimea to the tick-borne encephalitis virus].

The immune status of the Crimean population with respect to tick-borne encephalitis (TBE) virus has been studied. The results of the study confirm the existence of natural foci of TBE in the Crimea. The most active and potentially dangerous foci are located in forests of the mountain area of the peninsula.

[The immunogenic and hemagglutinating activities of tick-borne encephalitis viral strains isolated from patients in different parts of the geographic range of the disease].

Considerable variability of the immunogenic and antigenic (in HA test) activity of tick-borne encephalitis virus strains was shown. No correlation was observed between the hemagglutinating activity of strains and their capacity to stimulate humoral immunity in the infected animals. The results of the study did not allow one to place strains into groups according to the area of isolation in relation to their immunogenic and antigenic activity.

[Characteristics of clinical features of tick-borne encephalitis in Crimea].

The analysis of data collected from the clinical epidemiological and virological surveys in 1985-1988 on the incidence of arbovirus infection in population provided evidence for circulation of tick-borne encephalitis (TBE) virus in the Crimea. Etiological relevance of TBE virus in the onset of the diseases was revealed. Clinical picture of TBE in the Crimea is characterized by severe forms and diphasic fever with the relapse running more grave and protracted course.

[Multi-year observations of the humoral immunity status of patients with tick-borne encephalitis in 3 endemic regions].

Analysis of the results of the laboratory diagnosis of tick-borne encephalitis (TBE) by HI test over many years proved a statistically significant decrease by the 80's in the intensity of humoral immunity in the subjects with a history of tick-borne encephalitis in Kemerovo Province, Udmurtia and Latvia. A decrease in antihemagglutinin levels in the blood of convalescents after TBE was detected in endemic foci located in different geographical regions differing by epidemiological parameters; it did not depend on the portion of infected ticks and ratio of the clinical forms of the disease in a focus. Parallel tests by HI of the diagnostic value of several antigens of TBE virus strains isolated from different sources in different regions with sera from TBE patients revealed no differences among them.

[Cloning of the structural gene for diphtheria toxin from Corynebacterium diphtheriae PW8 and expression of its deletion derivative in E. coli].

The coding region of diphtheria toxin gene from Corynebacterium diphtheriae PW8 was cloned in Escherichia coli on pUC19 plasmid. 5' end of the gene was deleted. The deleted gene codes for a toxin like protein truncated for 36 N-terminal aminoacids.

[Demonstration of the tick-borne encephalitis virus by a solid-phase immunoenzyme method in materials from natural foci].

Large-scale examinations of specimens from natural foci of tick-borne encephalitis (TBE) demonstrated that sensitivity of solid-phase enzyme immunoassay (EIA) in detecting TBE virus antigen was as high as that of the fluorescent antibody technique. The EIA takes less time and may be used for examinations of specimens after a preliminary passage in cell cultures. The EIA was also shown to be highly effective in the detection of TBE virus antigen in the cerebral tissue of patients post mortem and in the confirmation of the clinical diagnosis.

[Biological properties of tick-borne encephalitis strains isolated in different parts of its geographic range].

A comparative study of over 200 tick-borne encephalitis (TBE) virus strains isolated from patients and ticks in different regions varying in the proportion of severe clinical forms of TBE was carried out. The strains were tested for their pathogenicity for white mice, cytopathic and plaque-forming properties as well as for the interferon-inducing capacity in SPEV cells. All the strains were found to be highly neurovirulent for mice, to produce plaques with diameters varying form less than 1 to 10 mm, and to induce interferon production in SPEV cell.