Structure and Frictional Properties of Ultrahard AlMgB Thin Coatings.

This paper presents the results of studies on AlMgB-based ceramic coatings deposited on WC-Co hard alloy substrates using RF plasma sputtering. The aim of this work is to study the structure, phase composition, and mechanical properties of AlMgB-based coatings depending on the sputtering mode. According to the results of the microstructural study, the bias voltage applied to the substrate during the sputtering process significantly contributed to the formation of the coating morphology.

Influence of Dy and Ho on the Phase Composition of the Ti-Al System Obtained by 'Hydride Technology'.

The manuscript describes the phase composition, microstructure, some physical and mechanical properties of the Ti-Al system with addition of 2 at. % Dy (TAD) and Ho (TAH) obtained by "hydride technology". Phase diagrams for Ti-Al-Dy and Ti-Al-Ho at a temperature of 1150 °C and basic properties for ternary phases Dy₆Ti₄Al₄₃ and Ho₆Ti₄Al₄₃ were calculated.

Phase Composition, Structure and Properties of the Spark Plasma Sintered Ceramics Obtained from the AlMg-B-Si Powder Mixtures.

In this work, composite materials were obtained by spark plasma sintering of an AlMg-B-Si powder mixture. The structure, phase composition, and mechanical properties of the obtained composites were studied. It was found that various compounds based on B icosahedrons, such as AlB, BSi, and BSi, are formed during spark plasma sintering.

The Influence of Scandium on the Composition and Structure of the Ti-Al Alloy Obtained by "Hydride Technology".

In this study the influence of scandium on the structural and phase state of the Ti-Al alloy obtained by the method of "Hydride Technology" (HT). The Rietveld method has allowed for determining the content of basic phases of the 49at.%Ti-49at.

Non-Invasive Diagnosis of Malignancies Based on the Analysis of Markers in Exhaled Air.

Novel non-invasive methods for the diagnosis of malignancies should be effective for early diagnosis, reproducible, inexpensive, and independent from the human factor. Our aim was to establish the applicability of the non-invasive method, based on the analysis of air exhaled by patients who are at different stages of oropharyngeal, larynx and lung cancer. The diagnostic device includes semiconductor sensors capable of measuring the concentrations of gas components in exhaled air, with the high sensitivity of 1 ppm.

Cancer Diagnosis by Neural Network Analysis of Data from Semiconductor Sensors.

"Electronic nose" technology, including technical and software tools to analyze gas mixtures, is promising regarding the diagnosis of malignant neoplasms. This paper presents the research results of breath samples analysis from 59 people, including patients with a confirmed diagnosis of respiratory tract cancer. The research was carried out using a gas analytical system including a sampling device with 14 metal oxide sensors and a computer for data analysis.

[Prognostic potential of sensometry in scheduled patients during the use of drugs for neuroleptanalgesia].

Tactile and pain thresholds were determined in 116 patients 24 hours before surgery upon premedication and administration of fentanyl and droperidol during induction to anesthesia. Statistical correlation analysis has shown that high pain thresholds in patients 24 hours before surgery indicate low consumption of barbiturates during induction to anesthesia, high efficacy of drugs used for NLA, and infrequent reactions to intubation irrespective of the efficacy of premedication. Low pain thresholds after premedication predict low efficacy of drugs for NLA and high consumption of fentanyl during surgery.

[The use of liposomes for "depositing" neurotropic preparations].

The possibility of formation of some liposomal neurotropic drugs was studied by 1H-NMR method. Experiments in animals on catalepsy and epidural anaesthesia confirmed this hypothesis.

[Stimulation of respiration with Piladox in experimental and clinical conditions during administration of drugs for general anesthesia].

Experimental and clinical studies of the agent Piladox (RGH 2202) were conducted. Experiments on animals (rats, rabbits, mice) demonstrated that Piladox possesses the property of restoring respiration inhibited by narcotic analgesics and some general anesthetics as well as the respiratory-de-priming effect of acute blood loss and is a more effective stimulator of the respiratory center than cordiamine (nikethamide) or corasol. Clinical study of Piladox in 75 patients showed that intravenous infusion of 1 mg/kg of the agent in the awakening period produced a stimulating effect on respiration through increase of its frequency and increase of the respiratory volume.

[Is fluidization of the phospholipid bilayer by general anesthetics a reason for general anesthesia?].

It was found that chlorpromazine and pipolfene potentiating general anaesthesia increase viscosity of phospholipid membrane in the region of polar headgroups and in the hydrophobic area near glycerol sceleton. These results (independently of potentiating mechanism) confuse a mechanism of anaesthetics action as increased fluidity of membrane phospholipids.

[Prolonged peridural analgesia with morphine in the acute period of a myocardial infarct].

The analgetic effect of prolonged peridural analgesia with morphine was studied experimentally in rabbits. Increasing morphine dose did not noticeably enhance analgesia. Prolonged peridural analgesia with morphine was used to alleviate pain in 18 myocardial infarction patients.

[Specific and nonspecific cytolysis reactions in rheumatic patients with a low degree of activity in the process of combined treatment by a high-protein diet and drug preparations].

Effect of therapy including high-protein diet and hormones on specific and nonspecific cytolysis was studied in patients with torpid and latent-running recurrent rheumatic carditis. The number of HeLa cells on which specific antigens (cardiac tissue extract, collagen, group C streptococcal nucleoproteid) were adsorbed significantly decreased on addition to the test target sensitized lymphocytes from the patients examined. As a result of therapy most patients showed the reduced activity of supernatants obtained from peripheral blood lymphocyte cultures that were incubated with specific antigens.

[Evaluation of the effect of a high-protein diet in combination with hormone and drug preparations on immunological homeostasis indices in rheumatism patients with a low degree of activity of the disease process].

High protein diet coupled with drugs was used for the treatment of patients with protracted and latent recurrent rheumocarditis. The mean daily doses of the drugs administered were as follows: 2 g of aspirin and 15 mg of prednisolone. With clinical improvement most patients showed a decrease in the amount of blast transformed lymphocytes in stained smears of the cultures of peripheral leukocytes incubated in the presence of cardial antigen, collagen and group C streptococcal nucleoprotein.

[T-cell activity in animals with an induced delayed allergy on a diet with a low protein content].

The dogs fed protein deficient diet (0.7 g/kg body weight) demonstrated reduced functional activity of T lymphocytes. Particularly, this diet exerted an adverse effect on adequacy of the proliferative response of mononuclear cells in culture in vitro as well as on cytotoxicity of lymphocytes with respect to target cells.

[Parameters of polynuclear cell activity in torpid and latent recurrent rheumocarditis in the process of treatment with a high-protein diet and drug preparations].

The in vitro test of direct granulation of basophils affected by specific antigens (cardial tissue, acid-soluble fraction of collagen, streptococcal allergens) was investigated in the course of treating 41 patients (29 women and 12 men aged from 20 to 50 years) suffering from a little active rheumatic fever. The patients received a complex of therapeutic measures including high-protein diet (130-140 g protein) and drugs (1.5-2.