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Perm’, Russia

Mizeva I.,Institute of Continues Media Mechanics | Dumler A.,Perm State Medical Academy | Muraviev N.,St. Petersburg State Medical University
BIOSIGNALS 2014 - 7th Int. Conference on Bio-Inspired Systems and Signal Processing, Proceedings; Part of 7th Int. Joint Conference on Biomedical Engineering Systems and Technologies, BIOSTEC 2014 | Year: 2014

Peripheral arterial occlusive disease (PAOD) of increasing severity can lead progressively to disabling claudication, ischemic rest pain and gangrene. The blood supply of a limb with peripheral arterial disease is restored by surgical operations, which treats the critical limb ischemia (CLI) only in 30% of the cases. CLI occurs when the arterial lumen decreases significantly and the nutritive requirements of the tissues, supplied by microcirculation, cannot be met. In the present paper, a simple, non-invasive and low-cost technique is proposed for early screening diagnosis of PAOD. The approach is based on the investigation of the spectral characteristics of pulse waves measured by photoplethysmography. Painless, versatility and simplicity are significant merits of the proposed methodology. Copyright © 2014 SCITEPRESS - Science and Technology Publications. All rights reserved. Source

Kuznetsova M.V.,Russian Academy of Sciences | Maslennikova I.L.,Russian Academy of Sciences | Karpunina T.I.,Perm State Medical Academy | Nesterova L.Y.,Russian Academy of Sciences | Demakov V.A.,Russian Academy of Sciences
Canadian Journal of Microbiology | Year: 2013

Pseudomonas aeruginosa and Escherichia coli are known to be involved in mixed communities in diverse niches. In this study we examined the influence of the predominant form of cell existence of and the exometabolite production by P. aeruginosa strains on interspecies interactions, in vitro. Bacterial numbers of P. aeruginosa and E. coli in mixed plankton cultures and biofilms compared with their numbers in single plankton cultures and biofilms changed in a different way, but were in accordance with the form of P. aeruginosa cell existence. The mass of a mixed-species biofilm was greater than the mass of a single-species biofilm. Among the mixed biofilms, the one with the "planktonic" P. aeruginosa strain had the least biomass. The total pyocyanin and pyoverdin levels were found to be lower in all mixed plankton cultures. Despite this, clinical P. aeruginosa strains irrespective of the predominant form of existence ("biofilm" or "planktonic") had a higher total concentration of exometabolites than did the reference strain in 12-24 h mixed cultures. The metabolism of E. coli, according to its bioluminescence, was reduced in mixed cultures, and the decrease was by 20- to 100-fold greater with the clinical Pseudomonas strains than the reference Pseudomonas strain. Thus, both the predominant form of existence of and the exometabolite production by distinct P. aeruginosa strains should be considered to fully understand the interspecies relationship and bacteria survival in natural communities. Source

Osorgina I.V.,Perm State University | Porozova S.E.,Perm National Research Polytechnic Institute | Plaksin S.A.,Perm State Medical Academy | Morozov I.A.,RAS Institute of Continuous Media Mechanics
Biomedical Engineering | Year: 2016

The surface of polyurethane membranes of breast prostheses that were present in the human body for a long time were studied with instrumental methods of IR and Raman spectroscopy, atomic force microscopy, and energy dispersive spectrometry. It was found that the membrane surface was partially covered by plaque containing calcium and phosphorus. © 2016 Springer Science+Business Media New York Source

Gein V.L.,Perm State Pharmaceutical Academy | Gein L.F.,Perm State Medical Academy | Platonov V.S.,Perm State Pharmaceutical Academy
Russian Journal of General Chemistry | Year: 2014

Reactions of 1,4,5-trisubstituted 3-hydroxy-3-pyrrolin-2-ones with diphenyldiazomethane yield the O-alkylation products. Thermolysis of 1,5-diaryl-4-heteroyl-3-hydroxy-3-pyrrolin-2-ones is accompanied with suprafacial [1,5]-sigmatropic rearrangement. © 2014 Pleiades Publishing, Ltd. Source

Morozov I.A.,RAS Institute of Continuous Media Mechanics | Belyaev A.Yu.,Perm National Research Polytechnic Institute | Izyumov R.I.,Perm National Research Polytechnic Institute | Erofeeva E.S.,Perm State Medical Academy | Gileva O.S.,Perm State Medical Academy
Inorganic Materials: Applied Research | Year: 2013

The quantitative analysis of the tooth enamel microstructure before and after whitening is conducted. For primary processing and visualization of the relief obtained by atomic force microscopy, a cartographic method is applied. Analyzing the height distribution, a topologically grounded zero level is found relative to which all the calculations are made. The estimation is made and the differences in the statistical, correlation, and multifractal dependences of the tooth enamel surface structure before and after an erosion are shown. © 2013 Pleiades Publishing, Ltd. Source

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