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Article
Comparative modeling of fluorescence and P700 induction kinetics for alga Scenedesmus sp. obliques and cyanobacterium Synechocystis sp. PCC 6803. Role of state 2–state 1 transitions and redox state of plastoquinone pool
The model of thylakoid membrane system (T-M model) (Belyaeva et al. Photosynth Res 2019, 140:1–19) has been improved in order to analyze the induction data for dark-adapted samples of algal (Scenedesmus obliques)...
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Article
Photochemical Processes of Cell DNA Damage by UV Radiation of Various Wavelengths: Biological Consequences
Photochemical reactions in cell DNA are induced in various organisms by solar UV radiation and may lead to a series of biological responses to DNA damage, including apoptosis, mutagenesis, and carcinogenesis. ...
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Article
Influence of the Microenvironment Dynamics of Tryptophan on Its Fluorescence Parameters at Different Temperatures
The temperature dependences of the fast and slow fluorescence decay components of aqueous tryptophan solution after freezing under actinic light and in the dark were investigated in the temperature range from ...
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Article
Temperature Dependence of the Nonlinear Dynamics of the Deactivation of Excited States of Tryptophan in Various Media
The authors’ research on the dynamics of the excited states of tryptophan in various solvents as a function of temperature (–170 to +20°С) is presented. The antibatic behavior of the temperature dependences of...
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Article
Dynamics of In Vivo Membrane Processes in Algal Thylakoids as Analyzed from Chlorophyll Fluorescence Induction using the Photosystem II and Thylakoid Models
The OJIPSMT pattern of chlorophyll (Chl) a fluorescence induction (FI) was obtained using Scenedesmus obliquus (Scenedesmus) microalgal cells exposed, after dark adaptation, to moderate and high light intensities...
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Article
Machine learning methods for assessing photosynthetic activity: environmental monitoring applications
Monitoring of the photosynthetic activity of natural and artificial biocenoses is of crucial importance. Photosynthesis is the basis for the existence of life on Earth, and a decrease in primary photosynthetic...
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Article
Microfluorimeter for Studying the State of Photosynthetic Apparatus of Individual Cells of Microalgae
A fundamentally new microfluorimeter is designed to assess the functional state of primary photosynthesis in individual phytoplanktonic cells. The device is tested during a sea expedition. It allows estimation...
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Article
Mathematical Modeling in Biology. Part 1. Dynamic Models of Primary Photosynthesis Processes
The possibilities and advantages of a system-dynamic and agent-based approach to the modeling of processes in living systems are discussed. The basic principles and examples of kinetic and direct multiparticle...
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Article
Mathematical Modeling in Biology: Part 2. Models of Protein Interaction Processes in a Photosynthetic Membrane
The second part of the article concerns agent-based, multiparticle, Brownian and molecular dynamic models. In these models, the motion and interaction of individual proteins—electron carriers (Brownian multipa...
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Article
The VIth Congress of Biophysicists of Russia
An overview of the problems of modern biophysics, which were discussed at the VIth Congress of biophysicists of Russia, Sochi, September 2019 (http://conf-2019.biophys.ru
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Article
Model quantification of the light-induced thylakoid membrane processes in Synechocystis sp. PCC 6803 in vivo and after exposure to radioactive irradiation
Measurements of OJIP–SMT patterns of fluorescence induction (FI) in Synechocystis sp. PCC 6803 (Synechocystis) cells on a time scale up to several minutes were mathematically treated within the framework of thyla...
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Article
Models of Photosynthetic Electron Transport
Energy transduction reactions in the photosynthetic membrane are a primary step in storing solar energy to be used later in biosynthetic and other processes in living systems. This review summarizes the recent...
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Article
The Search for Extraterrestrial Microorganisms on Cosmic Objects from Space
The search for microorganisms in cosmic bodies of the Solar System is of great importance for understanding the problem of the origin of life. At present, it is difficult to create specialized laboratories sea...
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Article
Cytoplasmic Streaming as an Intracellular Conveyer: Effect on Photosynthesis and H+ Fluxes in Chara Cells
Giant-sized cells, such as the internodes of characean algae, demonstrate rapid (up to 100 μm/s) rotational cytoplasmic streaming that participates in long-distance intracellular interactions and coordinates t...
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Article
Effect of sucrose-bound polynuclear iron oxyhydroxide nanoparticles on the efficiency of electron transport in the photosystem II membranes
Effect of water-soluble and stable sucrose-bound iron oxyhydroxide nanoparticles [Fe[III] sucrose complex (FSC)] on the efficiency of electron transport in the photosystem II membranes was studied. FSC signifi...
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Article
Monitoring of the Photosynthetic Activity of the Microalgae Chlorella under Nitrogen Depletion Conditions
Abstract—The paper presents the results of monitoring of the photosynthetic activity of the green microalga Chlorella. A thermophilic strain of Chlorella with a high rate of cell division was cultivated in a phot...
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Article
Analyzing both the fast and the slow phases of chlorophyll a fluorescence and P700 absorbance changes in dark-adapted and preilluminated pea leaves using a Thylakoid Membrane model
The dark-to-light transitions enable energization of the thylakoid membrane (TM), which is reflected in fast and slow (OJIPSMT or OABCDE) stages of fluorescence induction (FI) and P700 oxidoreduction changes (ΔA8...
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Article
The Efficiency of Energy Transfer from Quantum Dots to Photosynthetic Reaction Centers of Rhodobacter sphaeroides in the Temperature Range of 100–310 K
The temperature dependence of the efficiency of energy transfer from polymer coated CdSe/CdS/ZnS quantum dots bearing terminal carboxyl groups to the reaction centers of purple bacteria Rb. sphaeroides was invest...
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Article
Simulation of chlorophyll fluorescence rise and decay kinetics, and P700-related absorbance changes by using a rule-based kinetic Monte-Carlo method
A model of primary photosynthetic reactions in the thylakoid membrane was developed and its validity was tested by simulating three types of experimental kinetic curves: (1) the light-induced chlorophyll a fluore...
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Article
Damaging and Defense Processes Induced in Plant Cells by UVB Radiation
UVB radiation (290–320 nm) activates various signaling mechanisms triggering the processes of programmed cell death in plants or their protection against the damaging action of this type of radiation. In the c...
