Evaluation of mechanical and electrical parameters of individual polyaniline nanoparticles

The work was carried out according to the state task of the Omsk Scientific Center SB RAS (project registration number AAAA-A17-117041210227-8)

Differential proteome analysis of pea roots at the early stages of symbiosis with nodule bacteria

In this paper, we have analyzed changes in the proteomic spectrum of pea Pisum sativum L. roots during inoculation with rhizobial bacteria with the aim of revealing new regulators of symbiosis development. To study the changes in the proteome spectrum of pea roots, a differential twodimensional (2-D) electrophoresis was performed using fluorescent labels Cy2 and Cy5. The images obtained made it possible to identify differences between the control variant (uninoculated roots) and the root variant after inoculation with Rhizobium leguminosarum bv. viciae RCAM 1026 (24 hours after treatment). 20 proteins were revealed and identified, the synthesis of which was enhanced during the inoculation of pea roots by nodule bacteria. To identify the proteins, a mass spectrometric analysis of tryptic peptides was performed on a quadrupole-time-of-flight mass spectrometer combined with a high-performance liquid chromatograph. Among such proteins, the beta-subunit of the G protein and the disulfide isomerase/phospholipase C were first found, whose function can be related to the signal regulation of symbiosis. This indicates that G-proteins and phospholipases can play a key role in the development of early stages of symbiosis in peas. Further experiments are expected to show whether the beta-subunit of the G protein interacts with the receptors to Nod factors, and how this affects the further signaling. Other proteins that might be interesting were annexin D8 and D1, protein kinase interacting with calcinerin B, actin-binding protein profilin, GTP-binding protein Ran1. They may be involved in the regulation of reactions with calcium, the reorganization of the actin cytoskeleton and other important processes in plants. The study of the role of such regulatory proteins will later become the basis for understanding the complex system of signal regulation, which is activated in pea plants by interaction with nodule bacteria

Postoperative encephalopathy: Pathophysiological and morphological bases of its prevention under general anesthesia

In vitro and in vivo studies have provided sufficient evidence of the neurotoxicity of general anesthetics and their ability to cause postoperative cognitive dysfunction (POCD). The latter is one of the undesirable phenomena associated with general anesthesia. Recently, the prevention of postoperative cognitive impairments has been of particular relevance because of their high incidence, longer length of hospital stay, higher cost of treatment, worse quality of life in patients, and no approaches to drug correction and prevention. The review gives data on the negative effects of general anesthesia in patients of different age groups, highlights the pathogenetic mechanisms of POCD, and proposes its possible drug prevention and treatment strategies: identification of patients at high risk for POCD and both pre- and postoperative neuropsychological testing; intraoperative POCD prevention using a package of measures and, if inefficient, drug correction of found cognitive impairments just in the early postoperative period

Combination of scanning force microscopy methods to evaluation the electrophysical parameters of individual multiwalled carbon nanotubes

Путем совместного использования методов электростатической силовой микроскопии и проводящей атомно-силовой микроскопии разработана методика определения электрофизических параметров индивидуальных многостенных углеродных нанотрубок.Based on a combination of electrostatic force microscopy and conductive atomic force microscopy, the technique for determining the electrical parameters of individual multiwalled carbon nanotubes was developed

AFM study of the supramolecular structure transformation of polyaniline and composite "polyaniline/carbon nanotubes" upon doping with dodecylbenzenesulfonic acid in the presence of a solvent

На основе анализа АСМ изображений изучен механизм трансформации надмолекулярной структуры пленок полианилина и композита «полианилин/углеродные нанотрубки» в форме основания в результате совместного воздействия допанта – додецилбензолсульфокислоты и растворителя.Based AFM image analysis, the supramolecular structure transformation mechanism of polyaniline films and the "polyaniline/carbon nanotube" composite films in the base form as a result of combined effect of dopant–dodecylbenzenesulfonic acid and a solvent was studied

DEVELOPMENT OF THE HARDWARE AND SOFTWARE COMPLEX CONTROLLING ROBOTIC DEVICES BY MEANS OF BIOELECTRIC SIGNALS OF THE BRAIN AND MUSCLES

Aim - to develop a hardware-software complex with combined command-proportional control of robotic devices based on electromyography (EMG) and electroencephalography (EEG) signals. Materials and methods. EMG and EEG signals are recorded using our original units. The system also supports a number of commercial EEG and EMG recording systems, such as NVX52 (MCS ltd, Russia), DELSYS Trigno (Delsys Inc, USA), MYO Thalmic (Thalmic Labs, Canada). Raw signals undergo preprocessing and feature extraction. Then features are fed to classifiers. The interpretation unit controls robotic devices on the base of classified EEG- and EMG-patterns and muscle effort estimation. The number of controlled devices includes mobile robot LEGO NXT Mindstorms (LEGO, Denmark), humanoid robot NAO (Aldebaran, France) and exoskeleton Ilia Muromets (UNN, Russia). Results. We have developed and tested an interface combining command and proportional control based on EMG signals. We have determined the parameters providing optimal characteristics of classification accuracy of EMG patterns, as well as the speed and accuracy of proportional control. Also we have developed and tested a BCI interface based on motor imagined patterns. Both EMG and EEG interfaces are included into hardware and software system. The system combines outputs of the interfaces and sends commands to a robotic device. Conclusion. We have developed and approved the hardware-software system on the basis of the combined command-proportional EMG and EEG control of external robotic devices

Effects of T- and P-odd weak nucleon interaction in nuclei: renormalizations due to residual strong interaction, matrix elements between compound states and their correlations with P-violating matrix elements

Manifestations of P-,T-odd weak interaction between nucleons in nucleus are considered. Renormalization of this interaction due to residual strong interaction is studied. Mean squared matrix elements of P-,T-odd weak interaction between compound states are calculated. Correlators between P-,T-odd and P-odd, T-even weak interaction matrix elements between compound states are considered and estimates for these quantities are obtained.Comment: Submitted to Phys. Rev. C; 21 pages, REVTEX 3, no figure

Performance of the CMS Cathode Strip Chambers with Cosmic Rays

The Cathode Strip Chambers (CSCs) constitute the primary muon tracking device in the CMS endcaps. Their performance has been evaluated using data taken during a cosmic ray run in fall 2008. Measured noise levels are low, with the number of noisy channels well below 1%. Coordinate resolution was measured for all types of chambers, and fall in the range 47 microns to 243 microns. The efficiencies for local charged track triggers, for hit and for segments reconstruction were measured, and are above 99%. The timing resolution per layer is approximately 5 ns