Publications by authors named "A A Chernikova"
[Validation of ballistocardiography data for predicting the sleep efficiency in healthy individuals and patients with insomnia].
Zh Nevrol Psikhiatr Im S S Korsakova
November 2024
Objective: To identify valid parameters of heart rate variability (HRV) and musculoskeletal movements based on ballistocardiography data, which allow predicting the sleep efficiency (SE) index in healthy individuals and patients with insomnia.
Material And Methods: Ten healthy individuals and 14 patients with chronic insomnia were examined using polysomnography and ballistocardiography. A regression analysis of the data was carried out, as well as a reliability check of the resulting mathematical model.
Background: The global demographic situation has been significantly impacted by the COVID-19 pandemic. The objective of this study was to develop a model that predicts the risk of COVID-associated mortality using clinical and laboratory data collected within 72 h of hospital admission.
Materials And Methods: A total of 3024 subjects with PCR-confirmed COVID-19 were admitted to Almazov National Research Medical Center between May 2020 and August 2021.
Unlabelled: Recent studies have demonstrated the relationship between vitamin D deficiency, infection severity and mortality from COVID-19. This study aimed to analyze the vitamin D metabolites and cytokine expression levels of COVID-19 patients who were hospitalized with bolus cholecalciferol supplementation.
Materials And Methods: This study represents the next stage of the open-label randomized pilot conducted by the Almazov National Medical Research Centre.
Volatile compounds emitted by bacteria can play a significant role in interacting with microorganisms, plants, and other organisms. In this work, we studied the effect of total gaseous mixtures of organic as well as inorganic volatile compounds (VCs) and individual pure volatile organic compounds (VOCs: ketones 2-nonanone, 2-heptanone, 2-undecanone, a sulfur-containing compound dimethyl disulfide) synthesized by the rhizosphere Pseudomonas chlororaphis 449 and Serratia plymuthica IC1270 strains, the soil-borne strain P. fluorescens B-4117, and the spoiled meat isolate S.
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- The study investigates how a bottom TiO interfacial layer affects the ferroelectric properties of TiN/HfZrO/TiN capacitors, showing that adding this layer increases the polar orthorhombic phase in the HfZrO film.
- The thickness of the TiO layer significantly influences the crystalline structure of HfZrO, leading to a stabilization of the monoclinic phase at greater TiO thicknesses.
- While the TiO layer enhances retention performance by reducing oxygen vacancies and imprint effects, there are limitations in endurance due to phase transitions in the TiO layer when the effective electric field is increased.