50 research outputs found

    Neuropsychological Study of Resilience of School Graduates of the Region of Ecological Trouble

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    The article presents the data of neuropsychological research in the framework of a comprehensive study of the resilience of the youth population (secondary school graduates) of the region of ecological trouble – Zabajkal‘skij kraj. The authors consider resilience as a systemic characteristic of the system ‘man–life environment’. The model of resilience including psychophysiological, psychological and personal levels is offered. Standardized psychometric and neuropsychological methods are used to evaluate level’s indicators. School graduates residing in ecologically unfavorable territories identified drift of psychophysiological level in the direction of lower standards and regulatory intensity indicators of psychological and personal levels ofresilience. Using a neuropsychological approach with the aim of finding mechanisms to a reduction of the indicators of the psycho-physiological level of resilience allowed us to determine the presence of signs of deficiency of certain brain areas (posterior frontal and parietal). It was established that with the increase of degree of the ecology trouble territories of research, there is a reliable increase of mistakes ofaccomplishment by test subjects who live on them, the neuropsychological tests investigating visually spatial functions, and also functions of the serial organization of mental activity. Though there is the presence of correlations between indicators of different levels of resilience, but the rating and the explanation by virtue of their disparate data is difficult. The search for correlates, in this case, can be more aimed at proving the possibility of the existence of the proposed model of resilience, its consistency and productivity of the instruments that are used for its study. Keywords: neuropsychological study, resilience, level of resilience, ecological trouble, secondary school graduate

    Evaluation of Electrochemical Performance of Antimony Modified Screen-Printed Carbon Electrodes

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    Received: 07.03.2024. Revised: 25.03.2024. Accepted: 28.03.2024. Available online: 09.04.2024.Neutral red was used as redox probe for comparative evaluation of the electrochemical performance of SPCEs modified with antimony.CV experiments showed an increase in the electroactive surface area of Sb/SPCEs compared to the bare-SPCE, depending on surface morphology.The obtained SEM, cyclic voltammetry and EIS data are in good agreement.A good correlation between electrochemical and electroanalytical characteristics of Sb/SPCEs was observed.NR as a redox probe can help controlling modification processes during the development of innovative antimonycontaining sensors.This study compares the electrochemical performance of screen-printed carbon electrodes (SPCEs) modified with antimony (Sb/SPCEs) under different potentiostatic pre-plating conditions. Neutral Red (NR) was employed as a novel redox probe to evaluate the electrochemical performance of Sb/SPCEs. It was demonstrated that NR in the protonated form performs quasi-reversible redox transformations at bare SPCE and Sb/SPCEs in phosphate buffer solutions (pH 5.5±0.5) in the potential range of (−0.30)–(−0.75) V, where the antimony is not electroactive. Sb/SPCEs were studied electrochemically by cyclic voltammetry (CV) / electrochemical impedance spectroscopy (EIS), and morphologically by scanning electron microscopy (SEM). Cyclic voltammetry investigations revealed the dependence of the electrochemical performance of Sb/SPCEs on the degree of coverage of the substrate with the metal. The obtained CV, EIS, and SEM data are consistent. The lowest charge transfer resistance (Rct) value (6 Ω) was obtained at Sb/SPCE with the highest degree of antimony coverage. To investigate the electroanalytical performance of Sb/SPCEs, nickel (II) ions were utilized as a model analyte. A study of roughness factors and sensitivity towards nickel (II) ions for Sb/SPCEs using twotailed Pearson's criterion revealed a high degree of correlation between their electrochemical and electroanalytical properties. The results show that using NR as a redox probe can help controlling modification processes during the development of innovative antimony-containing sensors.This work was supported by the Ministry of Science and Higher Education of the Russian Federation (Ural Federal University Program of Development within the Priority-2030 Program)

    FT-IR Analysis of P. aeruginosa Bacteria Inactivation by Femtosecond IR Laser Radiation

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    We report the successful inactivation of P. aeruginosa strain by femtosecond infrared (IR) laser radiation at the resonant wavelengths of 3.15 μm and 6.04 μm, chosen due to the presence of characteristic molecular vibrations in the main structural elements of the bacterial cells in these spectral ranges: vibrations of amide groups in proteins (1500–1700 cm−1), and C-H vibrations in membrane proteins and lipids (2800–3000 cm−1). The underlying bactericidal structural molecular changes were revealed by the stationary Fourier-transform IR spectroscopy, with the spectral peaks parameters being obtained by Lorentzian fitting with the hidden peaks revealed by the second derivative calculations, while no visible damage to the cell membranes was identified by scanning and transmission electron microscopy. © 2023 by the authors.Ministry of Education and Science of the Russian Federation, MinobrnaukaThis research was funded by the Ministry of Science and Higher Education of the Russian Federation (Ural Federal University Program of Development within the Priority-2030 Program)

    THE INFLUENCE OF CARBON NANOTUBES ON MORPHOLOGICAL AND ANALYTICAL CHARACTERISTICS OF CARBON SCREEN-PRINTED ELECTRODES

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    Multi-walled carbon nanotubes (CNT) are used as a modifier of carbon containing thick film electrodes for adsorptive stripping voltammetry. Morphological and analytical characteristics of electrodes with and without CNT were compared. It was found that the addition o f CNT increases the effective surface of the electrode and to facilitate the reduction of calomel. Electrodes with CNT have a twice higher sensitivity and 3 - 5 times ower limit of detection were shown

    Global fine-resolution data on springtail abundance and community structure

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    Springtails (Collembola) inhabit soils from the Arctic to the Antarctic and comprise an estimated ~32% of all terrestrial arthropods on Earth. Here, we present a global, spatially-explicit database on springtail communities that includes 249,912 occurrences from 44,999 samples and 2,990 sites. These data are mainly raw sample-level records at the species level collected predominantly from private archives of the authors that were quality-controlled and taxonomically-standardised. Despite covering all continents, most of the sample-level data come from the European continent (82.5% of all samples) and represent four habitats: woodlands (57.4%), grasslands (14.0%), agrosystems (13.7%) and scrublands (9.0%). We included sampling by soil layers, and across seasons and years, representing temporal and spatial within-site variation in springtail communities. We also provided data use and sharing guidelines and R code to facilitate the use of the database by other researchers. This data paper describes a static version of the database at the publication date, but the database will be further expanded to include underrepresented regions and linked with trait data.</p

    Global fine-resolution data on springtail abundance and community structure

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    CODE AVAILABILITY : Programming R code is openly available together with the database from Figshare.SUPPLEMENTARY MATERIAL 1 : Template for data collectionSUPPLEMENTARY MATERIAL 2 : Data Descriptor WorksheetSpringtails (Collembola) inhabit soils from the Arctic to the Antarctic and comprise an estimated ~32% of all terrestrial arthropods on Earth. Here, we present a global, spatially-explicit database on springtail communities that includes 249,912 occurrences from 44,999 samples and 2,990 sites. These data are mainly raw sample-level records at the species level collected predominantly from private archives of the authors that were quality-controlled and taxonomically-standardised. Despite covering all continents, most of the sample-level data come from the European continent (82.5% of all samples) and represent four habitats: woodlands (57.4%), grasslands (14.0%), agrosystems (13.7%) and scrublands (9.0%). We included sampling by soil layers, and across seasons and years, representing temporal and spatial within-site variation in springtail communities. We also provided data use and sharing guidelines and R code to facilitate the use of the database by other researchers. This data paper describes a static version of the database at the publication date, but the database will be further expanded to include underrepresented regions and linked with trait data.Open Access funding enabled and organized by Projekt DEAL.http://www.nature.com/sdatahj2024Plant Production and Soil ScienceSDG-15:Life on lan

    Initial renal function and type of chemotherapy: impact on treatment efficacy in patients with chronic lymphocytic leukemia

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    The paper presents an assessment of treatment efficacy in chronic lymphocytic leukemia CLL patients according to chemotherapy type and initial renal function. The high efficacy of chemotherapy with fludarabine in CLL patients with or without renal failure at diagnosis was revealed. However, regardless of chemotherapy type initial treatment response was worse in patients with renal failure.</p

    Neuropsychological Study of Resilience of School Graduates of the Region of Ecological Trouble

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    The article presents the data of neuropsychological research in the framework of a comprehensive study of the resilience of the youth population (secondary school graduates) of the region of ecological trouble – Zabajkal‘skij kraj. The authors consider resilience as a systemic characteristic of the system ‘man–life environment'. The model of resilience including psychophysiological, psychological and personal levels is offered. Standardized psychometric and neuropsychological methods are used to evaluate level's indicators. School graduates residing in ecologically unfavorable territories identified drift of psychophysiological level in the direction of lower standards and regulatory intensity indicators of psychological and personal levels ofresilience. Using a neuropsychological approach with the aim of finding mechanisms to a reduction of the indicators of the psycho-physiological level of resilience allowed us to determine the presence of signs of deficiency of certain brain areas (posterior frontal and parietal). It was established that with the increase of degree of the ecology trouble territories of research, there is a reliable increase of mistakes ofaccomplishment by test subjects who live on them, the neuropsychological tests investigating visually spatial functions, and also functions of the serial organization of mental activity. Though there is the presence of correlations between indicators of different levels of resilience, but the rating and the explanation by virtue of their disparate data is difficult. The search for correlates, in this case, can be more aimed at proving the possibility of the existence of the proposed model of resilience, its consistency and productivity of the instruments that are used for its study. Keywords: neuropsychological study, resilience, level of resilience, ecological trouble, secondary school graduate
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