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Detoxification of AM-241 solutions by humic substances: Bioluminescent monitoring / T. Rozhko [et al.] // Analytical and Bioanalytical Chemistry. - 2011. - Vol. 400, Is. 2. - P329-334, DOI 10.1007/s00216-010-4442-9 . - ISSN 1618-2642
Кл.слова (ненормированные):
Detoxification -- Humic substances -- Ionizing radiation -- Luminous bacteria -- Bacterial cells -- Bottom sediments -- Humic substances -- Luminescent intensity -- Luminous bacteria -- Natural transformations -- Organic substances -- Photobacterium phosphoreum -- Physiological activity -- Protecting agent -- Water solutions -- Anoxic sediments -- Bacteriology -- Bioluminescence -- Detoxification -- Ionizing radiation -- Luminance -- Radiation shielding -- Radioactivity -- Bacteria -- americium -- radioisotope -- article -- bioremediation -- chemistry -- environmental monitoring -- evaluation -- humic substance -- instrumentation -- luminescence -- metabolism -- methodology -- Photobacterium -- water pollutant -- Americium -- Biodegradation, Environmental -- Environmental Monitoring -- Humic Substances -- Luminescence -- Photobacterium -- Radioisotopes -- Water Pollutants, Chemical -- Bacteria (microorganisms) -- Photobacterium phosphoreum
Аннотация: The study addresses the effect of humic substances on marine luminous bacteria Photobacterium phosphoreum exposed to Am-241 (3,000 Bq L -1, water solution). Luminescent intensity of the bacteria was applied as a marker of their physiological activity. Humic substances have been found to reduce the effect of Am-241 on luminescence, decrease damage to cells, and change distribution of Am-241 between bacterial cells and intercellular media. It was shown that water-soluble humic substances, being products of natural transformation of organic substances in soil and bottom sediments, can serve as protecting agents for water microorganisms exposed to alpha radionuclides. В© 2010 Springer-Verlag.

Scopus
Держатели документа:
Siberian Federal University, Krasnoyarsk 660041, Russian Federation
Institute of Biophysics SB RAS, Krasnoyarsk 660036, Russian Federation
Irkutsk State University, Irkutsk 664003, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Rozhko, T.; Bondareva, L.; Mogilnaya, O.; Vydryakova, G.; Bolsunovsky, A.; Stom, D.; Kudryasheva, N.

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A one-dimensional model of vertical stratification of Lake Shira focussed on winter conditions and ice cover / S. N. Genova [et al.] // Aquatic Ecology. - 2010. - Vol. 44, Is. 3. - P571-584, DOI 10.1007/s10452-010-9327-7 . - ISSN 1386-2588
Кл.слова (ненормированные):
Convective mixed layer -- Ice formation -- Ice melting -- Simplified model -- Winter profiles -- anoxic conditions -- hydrogen sulfide -- ice cover -- inhomogeneity -- meromictic lake -- numerical model -- one-dimensional modeling -- pycnocline -- salinity -- seasonality -- stratification -- vertical profile -- water column -- water temperature -- Khakassia -- Lake Shira -- Russian Federation
Аннотация: In meromictic lakes such as Lake Shira, horizontal inhomogeneity is small in comparison with vertical gradients. To determine the vertical distribution of temperature, salinity, and density of water in a deep zone of a Lake Shira, or other saline lakes, a one-dimensional (in vertical direction) mathematical model is presented. A special feature of this model is that it takes into account the process of ice formation. The model of ice formation is based on the one-phase Stefan problem with the linear temperature distribution in the solid phase. A convective mixed layer is formed under an ice cover due to salt extraction in the ice formation process. To obtain analytical solutions for the vertical distribution of temperature, salinity, and density of water, we use a scheme of vertical structure in the form of several layers. In spring, the ice melts as top and bottom. These processes are taken into account in the model. The calculated profiles of salinity and temperature of Shira Lake are in good agreement with field measurement data for each season. Additionally, we focussed on the redox zone, which is the zone in which the aerobic layers of a water column meet the anaerobic ones. Hyperactivity of plankton communities is observed in this zone in lakes with hydrogen sulphide monimolimnion, and Lake Shira is among them. The location of the redox zone in the lake, which is estimated from field measurements, coincides with a sharp increase in density (the pycnocline) during autumn and winter. During spring and summer, the redox zone is deeper than the pycnocline. The location of pycnocline calculated with the hydro physical model is in good agreement with field measurement data. В© 2010 Springer Science+Business Media B.V.

Scopus
Держатели документа:
Institute of Computational Modeling SB RAS, Akademgorodok 50/44, Krasnoyarsk 660036, Russian Federation
Krasnoyarsk, Siberian Federal University, Institute of Mathematics, Svobodny 79, Krasnoyarsk 660041, Russian Federation
Institute of Biophysics SB RAS, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Federal University, Institute of Mathematics, Svobodny 79, Krasnoyarsk 660041, Russian Federation
Netherlands Institute of Ecology, Center for Limnology, Rijksstraatweg 6, Nieuwersluis 3631 AC, Netherlands : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Genova, S.N.; Belolipetskii, V.M.; Rogozin, D.Y.; Degermendzhy, A.G.; Mooij, W.M.

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Degradation of P(3HB) and P(3HB-co-3HV) in biological media / E. I. Shishatskaya [et al.] // Journal of Biomaterials Science, Polymer Edition. - 2005. - Vol. 16, Is. 5. - P643-657, DOI 10.1163/1568562053783678 . - ISSN 0920-5063
Кл.слова (ненормированные):
Degradation rate -- Fiber properties -- Morphology -- Poly(hydroxybutyrate-co-hydroxyvalerate) (P(3HB-co-3HV)) -- Polyhydroxyalkanoates(PHAs) -- Polyhydroxybutyrate (P(3HB)) -- Copolymers -- Degradation -- Differential scanning calorimetry -- Enzymes -- Morphology -- Scanning electron microscopy -- Tensile strength -- Tissue -- Transmission electron microscopy -- Degradation rate -- Fiber properties -- Polyhydroxyalkanoates (PHAs) -- Polyhydroxybutyrate (P(3HB)) -- Biopolymers -- buffer -- copolymer -- poly(3 hydroxybutyric acid) -- polyhydroxybutyrate hydroxyvalerate copolymer -- unclassified drug -- animal experiment -- animal model -- animal tissue -- article -- biodegradation -- controlled study -- crystal structure -- fiber -- giant cell -- in vitro study -- in vivo study -- macrophage -- morphology -- nonhuman -- pH -- priority journal -- rat -- structure analysis -- tensile strength -- tissue water -- weight reduction -- Animals -- Biodegradation, Environmental -- Buffers -- Humans -- Hydrogen-Ion Concentration -- Hydroxybutyrates -- Macrophages -- Microscopy, Electron, Scanning -- Microscopy, Electron, Transmission -- Muscle, Skeletal -- Polyesters -- Rats -- Rats, Wistar
Аннотация: The biodegradability of oriented fibers made of polyhydroxybutyrate (P(3HB)) and its co-polymer with ?-hydroxyvalerate (P(3HB-co-3HV)) was investigated in buffer solutions and in biological media in vitro and in vivo. The fibers of both polymer types demonstrated resistance to hydrolytic degradation in buffer solutions at 38В°C and pH from 4.5 to 7.0 (for up to 180 days). It has been found that the biodegradation of the fibers in vitro in blood and serum and in vivo is accompanied by weight losses and minor changes in the microstructure with no significant losses in the tensile strength over a long time (up to 180 days). The biodegradation rate of the less crystalline co-polymer P(3HB-co-3HV) fibers was 1.4-2.0-times higher than that of the homopolymer P(3HB). It has also been shown that the degradation of the fibers in vivo is influenced both by tissue fluid enzymes and cells (macrophages and foreign-body giant cells). The fibers were eroded on the surface only with no gross defects and no dramatic effects on their mechanical performance. В© VSP 2005.

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Держатели документа:
Institute of Biophysics of Siberian Branch of Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 600326, Russian Federation
Department of Cardiac Surgery, University of Glasgow, Royal Infirmary, 10 Alexandra Parade, Glasgow G3, United Kingdom : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Shishatskaya, E.I.; Volova, T.G.; Gordeev, S.A.; Puzyr, A.P.

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Methods of nonlinear dynamics and equilibrium structures of magnetoelastic chains / P. I. Belobrov, A. G. Tret'yakov, G. M. Zaslavsky // Journal of Statistical Physics. - 1985. - Vol. 38, Is. 1-2. - P393-404, DOI 10.1007/BF01017869 . - ISSN 0022-4715
Кл.слова (ненормированные):
chaos -- Incommensurate structure -- magnetoelastic interaction -- nonlinear resonance
Аннотация: To study equilibrium structures of magnetoelastic chains we have introduced an equivalent system and examined the whole class of its solutions. Appearance of various structures of the chain is due to the choice of an appropriate minimizing solution of the equivalent dynamic system. Commensurate and incommensurate structures, transitions from ferromagnetic to antiferromagnetic states, and transitions to the states with alternating clusters of ordered spins are obtained. Conditions for appearance of chaotic structures and amorphous magnetic states of the chain are discussed. В© 1985 Plenum Publishing Corporation.

Scopus
Держатели документа:
L. V. Kirensky Institute of Physics, USSR Academy of Sciences Siberian Branch, Krasnoyarsk, 660036, Russia : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Belobrov, P.I.; Tret'yakov, A.G.; Zaslavsky, G.M.

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A biological method of including mineralized human liquid and solid wastes into the mass exchange of bio-technical life support systems / S. A. Ushakova [et al.] // Advances in Space Research. - 2012. - Vol. 50, Is. 7. - P932-940, DOI 10.1016/j.asr.2012.05.023 . - ISSN 0273-1177
Кл.слова (ненормированные):
Bio-technical life support system -- Conveyor-grown uneven-aged communities of wheat and Salicornia -- Utilization of human wastes -- Age groups -- Biological methods -- Dry weight -- Expanded clay -- Harvest index -- Human waste -- Leafy vegetables -- Liquid wastes -- Mass exchange -- Mineral element -- Nutrient solution -- Plant communities -- Salicornia europaea -- Salt content -- Time interval -- Uneven-aged -- Water culture -- Wheat biomass -- Conveyors -- Incineration -- Irrigation -- Minerals -- Nutrients -- Plants (botany) -- Productivity -- Sodium chloride -- Waste incineration -- Waste utilization -- Liquids
Аннотация: The main obstacle to using mineralized human solid and liquid wastes as a source of mineral elements for plants cultivated in bio-technical life support systems (BLSS) is that they contain NaCl. The purpose of this study is to determine whether mineralized human wastes can be used to prepare the nutrient solution for long-duration conveyor cultivation of uneven-aged wheat and Salicornia europaea L. plant community. Human solid and liquid wastes were mineralized by the method of "wet incineration" developed by Yu. Kudenko. They served as a basis for preparing the solutions that were used for conveyor-type cultivation of wheat community represented by 5 age groups, planted with a time interval of 14 days. Wheat was cultivated hydroponically on expanded clay particles. To reduce salt content of the nutrient solution, every two weeks, after wheat was harvested, 12 L of solution was removed from the wheat irrigation tank and used for Salicornia europaea cultivation in water culture in a conveyor mode. The Salicornia community was represented by 2 age groups, planted with a time interval of 14 days. As some portion of the nutrient solution used for wheat cultivation was regularly removed, sodium concentration in the wheat irrigation solution did not exceed 400 mg/L, and mineral elements contained in the removed portion were used for Salicornia cultivation. The experiment lasted 4 months. The total wheat biomass productivity averaged 30.1 gВ·m -2В·day -1, and the harvest index amounted to 36.8%. The average productivity of Salicornia edible biomass on a dry weight basis was 39.3 gВ·m -2В·day -1, and its aboveground mass contained at least 20% of NaCl. Thus, the proposed technology of cultivation of wheat and halophyte plant community enables using mineralized human wastes as a basis for preparing nutrient solutions and including NaCl in the mass exchange of the BLSS; moreover, humans are supplied with additional amounts of leafy vegetables. В© 2012 COSPAR. Published by Elsevier Ltd. All rights reserved.

Scopus
Держатели документа:
Institute of Biophysics SB RAS, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Siberian State Technological University, 82, Mir Avenue, Krasnoyarsk 660049, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Ushakova, S.A.; Tikhomirov, A.A.; Tikhomirova, N.A.; Kudenko, Y.A.; Litovka, Y.A.; Anishchenko, O.V.

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Use of human wastes oxidized to different degrees in cultivation of higher plants on the soil-like substrate intended for closed ecosystems / A. A. Tikhomirov [et al.] // Advances in Space Research. - 2010. - Vol. 46, Is. 6. - P744-750, DOI 10.1016/j.asr.2010.02.024 . - ISSN 0273-1177
Кл.слова (ненормированные):
Life support systems -- Microflora -- Mineralized human wastes -- Phototrophic unit -- Wet incineration -- Alternating electromagnetic field -- Bioregenerative life support systems -- Degree of oxidations -- Denitrifying microorganisms -- Growth and development -- Higher plants -- Human waste -- Life support systems -- Mass exchange -- Microbiotas -- Microflora -- Microscopic fungi -- Mineralized human wastes -- Nutrient solution -- Oxidation level -- Phytopathogenic bacteria -- Plant productivity -- Soil-like substrate -- Wheat plants -- Biomolecules -- Electromagnetic fields -- Irrigation -- Magnetic field effects -- Metabolism -- Metabolites -- Oxidation -- Plants (botany) -- Soils -- Solvent extraction -- Wastes -- Waste incineration
Аннотация: To close mass exchange loops in bioregenerative life support systems more efficiently, researchers of the Institute of Biophysics SB RAS (Krasnoyarsk, Russia) have developed a procedure of wet combustion of human wastes and inedible parts of plants using H2O2 in alternating electromagnetic field. Human wastes pretreated in this way can be used as nutrient solutions to grow plants in the phototrophic unit of the LSS. The purpose of this study was to explore the possibilities of using human wastes oxidized to different degrees to grow plants cultivated on the soil-like substrate (SLS). The treated human wastes were analyzed to test their sterility. Then we investigated the effects produced by human wastes oxidized to different degrees on growth and development of wheat plants and on the composition of microflora in the SLS. The irrigation solution contained water, substances extracted from the substrate, and certain amounts of the mineralized human wastes. The experiments showed that the human wastes oxidized using reduced amounts of 30% H2O2: 1 ml/g of feces and 0.25 ml/ml of urine were still sterile. The experiments with wheat plants grown on the SLS and irrigated by the solution containing treated human wastes in the amount simulating 1/6 of the daily diet of a human showed that the degree of oxidation of human wastes did not significantly affect plant productivity. On the other hand, the composition of the microbiota of irrigation solutions was affected by the oxidation level of the added metabolites. In the solutions supplemented with partially oxidized metabolites yeast-like microscopic fungi were 20 times more abundant than in the solutions containing fully oxidized metabolites. Moreover, in the solutions containing incompletely oxidized human wastes the amounts of phytopathogenic bacteria and denitrifying microorganisms were larger. Thus, insufficiently oxidized sterile human wastes added to the irrigation solutions significantly affect the composition of the microbiological component of these solutions, which can ultimately unbalance the system as a whole. В© 2010 COSPAR. Published by Elsevier Ltd. All rights reserved.

Scopus
Держатели документа:
Institute of Biophysics SB RAS, Akademgorodok, 50/50, Krasnoyarsk 660036, Russian Federation
Universite Blaise Pascal, 24 avenue des Landais, 63174 Aubiere cedex, France
ESA/ESTEC, Keplerlaan 1, 2201 AZ Noordwijk, Netherlands : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Tikhomirov, A.A.; Kudenko, Y.A.; Ushakova, S.A.; Tirranen, L.S.; Gribovskaya, I.A.; Gros, J.-B.; Lasseur, C.

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Possibility of Salicornia europaea use for the human liquid wastes inclusion into BLSS intrasystem mass exchange / N. A. Tikhomirova [et al.] // Acta Astronautica. - 2008. - Vol. 63, Is. 7-10. - P1106-1110, DOI 10.1016/j.actaastro.2008.01.003 . - ISSN 0094-5765
Кл.слова (ненормированные):
BLSS -- NaCl turnover -- Salicornia europaea -- Space biology -- Acids -- Amides -- Arsenic compounds -- Biochemical engineering -- Biochemistry -- Biomass -- Cellulose -- Curing -- Drying -- Environmental engineering -- Fatty acids -- Garnets -- Health -- Human engineering -- Lipids -- Mineralogy -- Minerals -- Mining -- Nitrates -- Nitrogen -- Plants (botany) -- Polysaccharides -- Polyvinyl alcohols -- Renewable energy resources -- Silica -- Silicate minerals -- Sodium -- Sodium chloride -- Solutions -- Sugar (sucrose) -- Sugars -- Waste utilization -- Biochemical composition -- Biochemical substances -- Bioregenerative life support systems (BLSS) -- Component conditions -- Crude protein (CP) -- Dry weight (DW) -- Essential fatty acids -- Europaea -- H igh concentrations -- Human urine -- Linoleic acid (LA) -- Linolenic -- Lipid content -- Liquid wastes -- Mass exchanges -- Mineral compositions -- Nitrate nitrogen -- Nitrogen nutrition -- Non saturation -- Physico chemical processes -- Plant functions -- Plant lipids -- Reduced nitrogen -- Salicornia europaea -- Soluble sugars -- Wide spectrum -- Nonmetals -- Amides -- Arsenic -- Biochemistry -- Biomass -- Biotechnology -- Cellulose -- Curing -- Drying -- Fatty Acids -- Lipids -- Nonmetals -- Plants -- Polysaccharides -- Sugars
Аннотация: One of the ways of solving the problem of the human liquid wastes utilization in bioregenerative life support systems (BLSS) can be the use of halophytic vegetable plant Salicornia europaea capable of accumulating sodium chloride in rather high concentrations. Since the most specific higher plant function in BLSS, which at present cannot be substituted by physicochemical processes, appears to be the biosynthesis of a wide spectrum of nutritive substances necessary for a human, the object of the given work was the investigation of the S. europaea productivity, biochemical and mineral composition when grown under close to optimal BLSS vegetative component conditions. As the use of human urine after its preliminary physicochemical processing is supposed to be the mineral solution basis for the S. europaea cultivation, it is necessary to clear up the effect of reduced nitrogen on plants growth. Ground research was carried out. Biochemical composition of the S. europaea edible part showed that crude protein was contained in the highest degree. At that the content of crude protein (24% per dry weight) and cellulose (4.7% per dry weight) was higher in the plants grown on solutions containing amide nitrogen in comparison with the plants grown on solutions with nitrate nitrogen (15.4%-3.1% correspondingly). The water-soluble sugar contents were not high in the S. europaea edible part and depending on the nitrogen nutrition form they amounted to 1.1% (amide nitrogen) and 1.5% (nitrate nitrogen). The polysaccharide number (except cellulose) was rather higher and varied from 7.7% to 8.2%. Although the lipid content in the S. europaea plants was relatively low (7% per dry weight), it was shown that the plant lipids are characterized by a high nonsaturation degree mainly due to alpha linolenic and linoleic acids. Nitrogen nutrition form did not significantly affect the S. europaea productivity, and dry edible biomass of one plant was 8.6 g. Sodium and its concentrations predominated in the plant mineral composition and amounted in average to 9% per dry weight. Thus the S. europaea being the vegetable plant it can be the source of several biochemical substances and essential fatty acids. The present work also considers the influence of nitrate and amide forms of nitrogen on S. europaea biochemical and mineral composition. В© 2008 Elsevier Ltd. All rights reserved.

Scopus
Держатели документа:
Institute of Biophysics, Russian Academy of Sciences, Siberian Branch, Akademgorodok, 660036 Krasnoyarsk, Russian Federation
LGCB, Universite B. Pascal, CUST, BP206, 63174 Aubie're, cedex, France : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Tikhomirova, N.A.; Ushakova, S.A.; Tikhomirov, A.A.; Kalacheva, G.S.; Gros, J.-B.

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Influence of high concentrations of mineral salts on production process and NaCl accumulation by Salicornia europaea plants as a constituent of the LSS phototroph link / N. A. Tikhomirova [et al.] // Advances in Space Research. - 2005. - Vol. 35, Is. 9 SPEC. ISS. - P1589-1593, DOI 10.1016/j.asr.2005.01.055 . - ISSN 0273-1177
Кл.слова (ненормированные):
BLSS -- Intensity of PAR -- Mineral nutrition -- Productivity -- Salicornia europaea -- Biomass -- Concentration (process) -- Nitrogen -- Nutrition -- Photosynthesis -- Productivity -- Sodium chloride -- Bioregenerative life support systems (BLSS) -- Intensity of PAR -- Mineral nutrition -- Salicornia europaea -- Plants (botany) -- calcium -- magnesium -- nitrogen -- phosphorus -- potassium -- sodium chloride -- sulfur -- urea -- biomass -- conference paper -- culture medium -- dose response -- drug effect -- goosefoot -- growth, development and aging -- human -- light -- metabolism -- microclimate -- radiation exposure -- urine -- Biomass -- Calcium -- Chenopodiaceae -- Culture Media -- Dose-Response Relationship, Drug -- Ecological Systems, Closed -- Humans -- Life Support Systems -- Light -- Magnesium -- Nitrogen -- Phosphorus -- Potassium -- Sodium Chloride -- Sulfur -- Urea -- Urine
Аннотация: Use of halophytes (salt-tolerant vegetation), in a particular vegetable Salicornia europaea plants which are capable of utilizing NaCl in rather high concentrations, is one of possible means of NaCl incorporation into mass exchange of bioregenerative life support systems. In preliminary experiments it was shown that S. europaea plants, basically, could grow on urine pretreated with physicochemical processing and urease-enzyme decomposing of urea with the subsequent ammonia distillation. But at the same time inhibition of the growth process of the plants was observed. The purpose of the given work was to find out the influence of excessive quantities of some mineral elements contained in products of physicochemical processing of urine on the production process and NaCl accumulation by S. europaea plants. As the content of mineral salts in the human liquid wastes (urine) changed within certain limits, two variants of experimental solutions were examined. In the first variant, the concentration of mineral salts was equivalent to the minimum salt content in the urine and was: K - 1.5 g/l, P - 0.5 g/l, S - 0.5 g/l, Mg - 0.07 g/l, Ca - 0.2 g/l. In the second experimental variant, the content of mineral salts corresponded to the maximum salt content in urine and was the following: K - 3.0 g/l, P - 0.7 g/l, S - 1.2 g/l, Mg - 0.2 g/l, Ca - 0.97 g/l. As the control, the Tokarev nutrient solution containing nitrogen in the form of a urea, and the Knop nutrient solution with nitrogen in the nitrate form were used. N quantity in all four variants made up 177 mg/l. Air temperature was 24 В°C, illumination was continuous. Light intensity was 690 ?mol/m2s of photosynthetically active radiation. NaCl concentration in solutions was 1%. Our researches showed that the dry aboveground biomass of an average plant of the first variant practically did not differ from the control and totaled 11 g. In the second variant, S. europaea productivity decreased and the dry aboveground biomass of an average plant totaled 8 g. The increase of K quantity in the experimental solutions resulted in an elevated content of the element in the plants. The increase of K uptake in the second experimental variant was accompanied by a 30-50% decrease of Na content in comparison with the other variants. Comparative Na content in the other variants was practically identical. N, Mg and P content in the control and experimental variants was also practically identical. The increase of S quantity in the second experimental variant also increased S uptake by the plants. But Ca quantity, accumulated in aboveground plants biomass in the experimental variants was lower than in the control. NaCl uptake by plants, depending on the concentration of mineral salts in the experimental solutions, ranged from 8 g (maximum salt content) up to 15 g (minimum salt content) on a plant growth area that totaled 0.032 m2. Thus, high concentrations of mineral salts simulating the content of mineral salts contained in urine did not result in a significant decrease of S. europaea productivity. The present work also considers the influence of higher light intensity concentrations on productivity and NaCl accumulation by S. europaea plants grown on experimental solutions with high salt content. В© 2005 COSPAR. Published by Elsevier Ltd. All rights reserved.

Scopus
Держатели документа:
Institute of Biophysics, Russian Academy of Sciences, Siberian Branch, Akademgorodok, 660036 Krasnoyarsk, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Tikhomirova, N.A.; Ushakova, S.A.; Kovaleva, N.P.; Gribovskaya, I.V.; Tikhomirov, A.A.

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The possible way of introducing mineral elements of liquid human wastes into the material cycle in biological life support systems / A. A. Tikhomirov [et al.] // International Astronautical Federation - 55th International Astronautical Congress 2004. - 2004. - Vol. 3: International Astronautical Federation - 55th International Astronautical Congress 2004 (4 October 2004 through 8 October 2004, Vancouver) Conference code: 69653. - P1442-1448
Кл.слова (ненормированные):
Biomass -- Body fluids -- Hydrogen peroxide -- Life support systems (spacecraft) -- Solid wastes -- Biological life support systems -- Intrasystem material cycle -- Liquid human wastes -- Plant biomass -- Waste management
Аннотация: Along with the atmosphere, water and food regeneration processes in biological life support systems it is important to provide units and links responsible for utilization of unused plant biomass, human wastes and returning, if possible, the most of wastes into the intrasystem material cycle. The experience on construction of biological life support systems (BLSS) gained by the Institute of Biophysics SB RAS (Krasnoyarsk, Russia) allows us to suggest constructing an integrated biological-physical-chemical life support system with the biological unit predominating. It is possibly to partially mineralize urine and solid wastes by "wet incineration" by hydrogen peroxide in electric field. We suggest decomposing urea by a urease-enzymatic method using soybean or canavalia flour containing sufficient amount of urease. Consumption of 1.5 g of flour for decomposition of urea in daily urine and the possibility of producing flour from soybeans and canavalia grown inside the system make this method of urea decomposition rather prospective. Further ammonia distillation using the nitrification unit and evaporation of solution would make possible to return nitrogen and water back into the intrasystem cycle. Probably, in long-duration space expeditions the utilization of urine would be confined only by extraction of nitrogen and water from urine with further removal of dry residue to the stock, as the problem of returning sodium chloride into the intrasystem cycling has not been solved yet. As all biogenic elements contained in urine (except nitrogen) get lost at that, the solution of the problem with introducing NaCl and mineral elements into the cycle with the help of halophyte plants Salicornia europaea are of sufficient interest. This work presents the experimental results of growing Salicornia europaea on model solutions containing biogenic elements in the amounts equivalent to their content in urine and on urine, which undergone physically-chemically treatment by peroxide and ammonia distillation after urease-enzymatic decomposition. Taking into consideration that the mineral elements content in urine can vary, 2 variants of model solutions were used. In the first variant the content of P was 8-fold, S - 7-fold, K - 8-fold higher than in Knop's solution; the content of Ca and Mg almost complied with that in Knop's solution. In the variant P was 12-fold, S - 17-fold, K - 17-fold, Ca - 6-fold and Mg was 8-fold higher than in Knop's solution. The content of N and NaCl in both variants was the same and constituted 0.18 g/l and 10 g/l respectively. The results of carried experiments showed that growing plants on urine treated in the above-mentioned way is possible; though the productivity of plants would be less than on model solutions. The reasons of plant productivity drop and the possible ways of their removal have been discussed.

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Держатели документа:
Institute of Biophysics, SB, RAS, Krasnoyarsk, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Tikhomirov, A.A.; Gitelson, J.I.; Ushakova, S.A.; Kovaleva, N.P.; Tikhomirova, N.A.; Gribovskaya, I.V.

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10.

Potential of salt-accumulating and salt-secreting halophytic plants for recycling sodium chloride in human urine in bioregenerative life support systems / N. A. Tikhomirova [et al.] // Advances in Space Research. - 2011. - Vol. 48, Is. 2. - P378-382, DOI 10.1016/j.asr.2011.03.016 . - ISSN 0273-1177
Кл.слова (ненормированные):
BLSS -- Limonium gmelinii -- Mineral nutrition -- NaCl -- Salicornia europaea -- BLSS -- Limonium gmelinii -- Mineral nutrition -- NaCl -- Salicornia europaea -- Body fluids -- Pilot plants -- Recycling -- Silicate minerals -- Sodium chloride -- Plants (botany)
Аннотация: This study addresses the possibility of growing different halophytic plants on mineralized human urine as a way to recycle NaCl from human wastes in a bioregenerative life support system (BLSS). Two halophytic plant species were studied: the salt-accumulating Salicornia europaea and the salt-secreting Limonium gmelinii. During the first two weeks, plants were grown on Knop's solution, then an average daily amount of urine produced by one human, which had been preliminarily mineralized, was gradually added to the experimental solutions. Nutrient solutions simulating urine mineral composition were gradually added to control solutions. NaCl concentrations in the stock solutions added to the experimental and control solutions were 9 g/L in the first treatment and 20 g/L in the second treatment. The mineralized human urine showed some inhibitory effects on S. europaea and L. gmelinii. The biomass yield of experimental plants was lower than that of control ones. If calculated for the same time period (120 d) and area (1 m 2), the amount of sodium chloride taken up by S. europaea plants would be 11.7 times larger than the amount taken up by L. gmelinii plants (486 g/m 2 vs. 41 g/m 2). Thus, S. europaea is the better choice of halophyte for recycling sodium chloride from human wastes in BLSS. В© 2011 COSPAR. Published by Elsevier Ltd. All rights reserved. 25.

Scopus
Держатели документа:
Institute of Biophysics, Russian Academy of Sciences, Siberian Branch, 50 Akademgorodok, Krasnoyarsk 660036, Russian Federation
K.A. Timiryazev Plant Physiology Institute, Russian Academy of Sciences, 35 Botanicheskaya St., Moscow 127276, Russian Federation
Universite Blaise Pascal, LGCB, Polytech, BP 206, 36174 Aubiere, France
TFC-MCT, ESA/Estec, 1 Keplerlaan, 2201 AG Noordwijk, Netherlands : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Tikhomirova, N.A.; Ushakova, S.A.; Kudenko, Yu.A.; Gribovskaya, I.V.; Shklavtsova, E.S.; Balnokin, Yu.V.; Popova, L.G.; Myasoedov, N.A.; Gros, J.-B.; Lasseur, Ch.

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11.

Effect of photosynthetically active radiation, salinization, and type of nitrogen nutrition on growth of Salicornia europaea plants / S. A. Ushakova [et al.] // Russian Journal of Plant Physiology. - 2006. - Vol. 53, Is. 6. - P785-792, DOI 10.1134/S1021443706060094 . - ISSN 1021-4437
Кл.слова (ненормированные):
NaCl salinization -- Photosynthetically active radiation -- Productivity -- Salicornia europaea -- Types of nitrogen nutrition -- Salicornia europaea
Аннотация: Effects of various combinations of nutrient solution salinity (0.3, 171, and 342 mM NaCl), photosynthetically active radiation (PAR) of 600 or 1150 ?mol/(m2 s), and type of nitrogen nutrition (amide-N or nitrate-N) on the productivity and the content of accumulated mineral nutrients and free amino acids were studied in Salicornia europaea plants. At PAR of 600 ?mol/(m2 s), plant productivity increased with elevation of salinity level; at 1150 ?mol/(m2 s), the maximum productivity was observed in the plants grown at 171 mM of NaCl. The content of free amino acids in shoots, regardless of PAR, decreased with growing salinity level, whereas Na content, on the opposite, increased. Glutamic acid, rather than proline, was shown to be the main organic osmolyte in this plant species. Comparison of the productivity of plants grown on solutions with amide (urea) or nitrate nitrogen showed that higher biomass accumulation was achieved in the former case. В© 2006 Nauka/Interperiodica.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Ushakova, S.A.; Kovaleva, N.P.; Tikhomirova, N.A.; Gribovskaya, I.V.; Kolmakova, A.A.

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12.

Direct utilization of human liquid wastes by plants in a closed ecosystem / G. M. Lisovsky [et al.] // Advances in Space Research. - 1997. - Vol. 20, Is. 10. - P1801-1804 . - ISSN 0273-1177
Кл.слова (ненормированные):
fertilizer -- nitrogen -- sodium chloride -- urea -- article -- biomass -- culture medium -- feasibility study -- human -- metabolism -- methodology -- microclimate -- sewage -- urine -- waste management -- wheat -- Biomass -- Culture Media -- Ecological Systems, Closed -- Feasibility Studies -- Fertilizers -- Humans -- Nitrogen -- Sodium Chloride -- Triticum -- Urea -- Urine -- Waste Disposal, Fluid -- Waste Management
Аннотация: Model experiments in phytotrons have shown that urea is able to cover 70% of the demand in nitrogen of the conveyer cultivated wheat. At the same time wheat plants can directly utilize human liquid wastes. In this article by human liquid wastes the authors mean human urine only. In a long-term experiment on "man-higher plants" system with two crewmen, plants covered 63 m2, with wheat planted to - 39.6 m2. For 103 days, complete human urine (total amount - 210.7 1) wassupplied into the nutrient solution for wheat. In a month and a half NaCl supply into the nutrient solution stabilized at 0.9-1.65 g/l. This salination had no marked effect on wheat production. The experiment revealed the realistic feasibility to directly involve liquid wastes into the biological turnover of the life support system. The closure of the system, in terms of water, increased by 15.7% and the supply of nutrients for wheat plants into the system was decreased. Closedness of biological turnover of matter in a man-made "man - higher plants" ecological system might involve, among other processes, direct utilization of human liquid wastes by plants. The amount of urine comprises 15-20% of the total amount of water cycling within the system including water as part of food, household, hygiene and potable water necessary for man. What is more, it they contains most nitrogen-bearing compounds emitted by man, almost all of the NaCl and some other substances involved in the biological turnover. Human liquid wastes can be utilized either by preliminary physical-chemical treatment (evaporating or freezing out the water, finally oxidizing the organic matter, isolating the mineral components required for plants, etc.) and further involvement of the obtained products or by direct application into the nutrient solution for plants. The challenge of direct utilization is that plants have no need of Na+ and Cl-, and also the organic forms of nitrogen emitted by man cannot fully meet the demand of plants forthis element. Besides, hygienic and/or psychological reasons make it desirable to avoid direct use of liquid wastes in the nutrient solutions that would have direct contact with edible part of plants (tubers, roots, bulbs). Feasibility of direct utilization of liquid wastes by plants in a closed "man - higher plants" ecosystem has been experimentally studied on wheat - grain culture as a model plant with the edible part in the form of seeds spatially dissociated with the nutrient medium. The wheat covered 60-65% of the area under higher plants. The studies have been carried out in "Bios-3"experimental facility described in detail elsewhere (Lisovsky, 1979; Gitelson et al., 1989). В© 1997 COSPAR. Published by Elsevier Science Ltd.

Scopus
Держатели документа:
Inst. Biophys.-Russ. Acad. of Sci., Siberian Branch, Krasnoyarsk 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Lisovsky, G.M.; Gitelson, J.I.; Shilenko, M.P.; Gribovskaya, I.V.; Trubachev, I.N.

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13.

Electrosynthesis of hydrogen peroxide from oxygen in a gas-diffusion electrode in solutions of mineralized exometabolites / G. A. Kolyagin [et al.] // Russian Journal of Electrochemistry. - 2013. - Vol. 49, Is. 10. - P1004-1007, DOI 10.1134/S1023193513100091 . - ISSN 1023-1935
Кл.слова (ненормированные):
electroreduction of oxygen -- electrosynthesis of hydrogen peroxide -- gas diffusion electrode -- life-support system -- mineralization of biowaste -- processing of exometabolites
Аннотация: The electrosynthesis of H2O2 in aqueous solutions (pH 1-9) of mineralized liquid and solid bio-wastes (exometabolites) for their processing in closed life-support systems was studied. It was shown that H 2O2 can be obtained in these solutions by electrochemical reduction of oxygen in carbon black gas diffuse electrodes to concentrations of over 2 M with current efficiency 80%. The composition of the solution was found to affect the accumulation of H2O2 during the synthesis. The solutions can be concentrated further to 19 M H2O2. The results showed that the electrolytic method is promising for preparing H2O2 for closed life-support systems. В© 2013 Pleiades Publishing, Ltd.

Scopus
Держатели документа:
Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Kolyagin, G.A.; Kornienko, V.L.; Kudenko, Y.A.; Tikhomirov, A.A.; Trifonov, S.V.

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14.

Effect of organic and inorganic toxic compounds on luminescence of luminous Fungi / G. A. Vydryakova, A. A. Gusev, S. E. Medvedeva // Applied Biochemistry and Microbiology. - 2011. - Vol. 47, Is. 3. - P293-297, DOI 10.1134/S0003683811010194 . - ISSN 0003-6838
Кл.слова (ненормированные):
Armillaria -- Armillaria borealis -- Armillaria gallica -- Armillaria mellea -- Bacteria (microorganisms) -- Fungi -- Omphalotus japonicus
Аннотация: The possibility of the development of the solid phase bioluminescent biotest using aerial mycelium of luminous fungi was investigated. Effect of organic and inorganic toxic compounds (TC) at concentrations from 10 -6 to 1 mg/ml on luminescence of aerial mycelia of four species of luminous fungi-Armillaria borealis (Culture Collection of the Institute of Forest, Siberian Branch, Russian Academy of Sciences), A. mellea, A. gallica, and Lampteromyces japonicus (Fungi Collection of the Botanical Institute, Russian Academy of Sciences)-has been studied. Culture of A. mellea was shown to be most sensitive to solutions of the model TC. It was demonstrated that the sensitivity of the luminous fungi is comparable with the sensitivity of the bacteria that are used for environmental monitoring. Use of the aerial mycelium of luminous fungi on the solid support as a test object is a promising approach in biotesting for the development of continuous biosensors for air monitoring. В© 2011 Pleiades Publishing, Ltd.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Vydryakova, G.A.; Gusev, A.A.; Medvedeva, S.E.

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15.

Bioluminescent monitoring of radiotoxicity in solutions of alpha-radionuclides [Text] / N. S. Kudryasheva [et al.] // Luminescence. - 2008. - Vol. 23, Is. 2. - P78-78. - Cited References: 0 . - 1. - ISSN 1522-7235

РУБ Biochemistry & Molecular Biology

Держатели документа:
[Kudryasheva, N. S.
Rozhko, T. V.
Bondareva, L. G.
Bolsunovsky, A. Y.
Vydryakova, G. V.] Siberian Fed Univ, Inst Biophys SB RAS, Krasnoyarsk 660036, Russia : 660036, Красноярск, Академгородок, д. 50, стр. 50
Доп.точки доступа:
Kudryasheva, N.S.; Rozhko, T.V.; Bondareva, L.G.; Bolsunovsky, A.Y.; Vydryakova, G.V.

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16.

Effect of low-level alpha-radiation on bioluminescent assay systems of various complexity [Text] / T. V. Rozhko [et al.] // Photochem. Photobiol. Sci. - 2007. - Vol. 6, Is. 1. - P67-70, DOI 10.1039/b614162p. - Cited References: 52 . - 4. - ISSN 1474-905X

РУБ Biochemistry & Molecular Biology + Biophysics + Chemistry, Physical
Рубрики:
LOW-DOSE RADIATION
   IRRADIATION
   TOXICITY
   QUINONES
   HORMESIS
   PHENOLS
Аннотация: This study addresses the effects of low-level alpha-radiation on bioluminescent assay systems of different levels of organization: in vivo and in vitro. Three bioluminescent assay systems are used: intact bacteria, lyophilized bacteria, and bioluminescent system of coupled enzyme reactions. Solutions of Am-241(NO3)(3) are used as a source of alpha-radiation. It has been shown that activation processes predominate in all the three bioluminescent assay systems subjected to short-term exposure (20-55 h) and inhibition processes in the systems subjected to longer-term exposure to radiation. It has been found that these effects are caused by the radiation component of Am-241(3+) impact. The intensity of the Am-241(3+) effect on the bioluminescent assay systems has been shown to depend on the Am-241(3+) concentration, level of organization and integrity of the bioluminescent assay system. The bioluminescent assay systems in vivo have been found to be highly sensitive to Am-241(3+) (up to 10(-17) M).

Держатели документа:
SB RAS, Inst Biophys, Krasnoyarsk 660036, Russia : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Rozhko, T.V.; Kudryasheva, N.S.; Kuznetsov, A.M.; Vydryakova, G.A.; Bondareva, L.G.; Bolsunovsky, A.Y.

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17.

Preparation and preliminary study of crystals of the recombinant calcium-regulated photoprotein obelin from the bioluminescent hydroid Obelia longissima [Text] / E. S. Vysotski [et al.] // Acta Crystallogr. Sect. D-Biol. Crystallogr. - 1999. - Vol. 55. - P1965-1966, DOI 10.1107/S0907444999011828. - Cited References: 23 . - ISSN 0907-4449

РУБ Biochemical Research Methods + Biochemistry & Molecular Biology + Biophysics + Crystallography
Рубрики:
AEQUORIN
LUCIFERASE
LIGHT
Аннотация: Crystals of recombinant obelin, the Ca2+-regulated photoprotein from the marine hydroid Obelia longissima, have been grown from sodium citrate solutions. Crystals grow as hexagonal light-yellow rods (0.1 x 0.1 x 1.0 mm) which diffract to beyond 1.8 Angstrom with synchrotron radiation of 1.0 Angstrom wavelength. The crystals have a primitive hexagonal lattice with unit-cell parameters a = 81.55, c = 86.95 Angstrom. The asymmetric unit contains two molecules. This represents the successful preparation of single crystals of a photoprotein obelin which have promising diffraction properties.

Держатели документа:
Russian Acad Sci, Photobiol Lab, Inst Biophys, Siberian Branch, Krasnoyarsk 660036, Russia
Univ Georgia, Dept Biochem & Mol Biol, Athens, GA 30602 USA
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Vysotski, E.S.; Liu, Z.J.; Rose, J...; Wang, B.C.; Lee, J...

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18.

Ca2+-triggered coelenterazine-binding protein from Renilla as an enzyme-dependent label for binding assay [Text] / V. V. Krasitskaya [et al.] // Anal. Bioanal. Chem. - 2011. - Vol. 401, Is. 8. - P2573-2579, DOI 10.1007/s00216-011-5343-2. - Cited References: 17. - The work was supported by a "Leading Scientific School" (N 64987.2010.4) grant from the President of the Russian Federation and the "Molecular and Cell Biology" Program from the RAS. . - ISSN 1618-2642

РУБ Biochemical Research Methods + Chemistry, Analytical
Рубрики:
BIOLUMINESCENT IMMUNOASSAY
   LUCIFERASE
   PURIFICATION
   RENIFORMIS
   MUELLERI
   OBELIN
   PHOTOPROTEIN
   EXPRESSION
   SUBSTRATE
   CLONING
Кл.слова (ненормированные):
Ca2+-triggered coelenterazine-binding protein (CBP) -- Renilla muelleri luciferase -- Bioluminescent solid-phase microassay
Аннотация: The recombinant Ca2+-triggered coelenterazine-binding protein (CBP) from Renilla muelleri was investigated as a biospecifically labeled molecule for in vitro assay applications. The protein was shown to be stable in solutions in the frozen state, as well as stable under heating and to chemical modifications. Conjugates with biotin, oligonucleotide, and proteins were obtained and applied as biospecific molecules in a solid-phase microassay. CBP detection was performed with intact (no modifications were made) Renilla luciferase in the presence of calcium, and the detection limit was found to be 75 amol. Model experiments indicate that this approach shows much promise, especially with regard to the development of multianalytical systems.

Держатели документа:
[Korneeva, S. I.
Kudryavtsev, A. N.
Frank, L. A.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Krasitskaya, V. V.
Markova, S. V.
Stepanyuk, G. A.
Frank, L. A.] Russian Acad Sci SB, Inst Biophys, Krasnoyarsk 660036, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Krasitskaya, V.V.; Korneeva, S.I.; Kudryavtsev, A.N.; Markova, S.V.; Stepanyuk, G.A.; Frank, L.A.

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19.

Effects of mineral nutrition conditions on heat tolerance of chufa (Cyperus esculentus L.) plant communities to super optimal air temperatures in the BTLSS / E. S. Shklavtsova [et al.] // Adv. Space Res. - 2014. - Vol. 54, Is. 6. - P1135-1145, DOI 10.1016/j.asr.2014.05.031 . - ISSN 1879-1948
Кл.слова (ненормированные):
Bioregenerative life support system -- Chlorophyll fluorescence -- Cyperus esculentus L. -- Heat shock -- Lipid peroxidation -- Mineralized human wastes -- Atmospheric temperature -- Carbon dioxide -- Lipids -- Metabolism -- Minerals -- Nitrates -- Nitrogen -- Nutrition -- Plants (botany) -- Urea -- Wastes -- Bioregenerative life support systems -- Chlorophyll fluorescence -- Cyperus esculentus -- Heat-shock -- Human waste -- Lipid peroxidation -- Plant shutdowns
Аннотация: The use of mineralized human wastes as a basis for nutrient solutions will increase the degree of material closure of bio-technical human life support systems. As stress tolerance of plants is determined, among other factors, by the conditions under which they have been grown before exposure to a stressor, the purpose of the study is to investigate the level of tolerance of chufa (Cyperus esculentus L.) plant communities grown in solutions based on mineralized human wastes to a damaging air temperature, 45 °C. Experiments were performed with 30-day-old chufa plant communities grown hydroponically, on expanded clay aggregate, under artificial light, at 690 ?mol m-2 s-1 PAR and at a temperature of 25 °C. Plants were grown in Knop's solution and solutions based on human wastes mineralized according to Yu.A. Kudenko's method, which contained nitrogen either as ammonium and urea or as nitrates. The heat shock treatment lasted 20 h at 690 and 1150 ?mol m -2 s-1 PAR. Chufa heat tolerance was evaluated based on parameters of CO2 gas exchange, the state of its photosynthetic apparatus (PSA), and intensity of peroxidation of leaf lipids. Chufa plants grown in the solutions based on mineralized human wastes that contained ammonium and urea had lower heat tolerance than plants grown in standard mineral solutions. Heat tolerance of the plants grown in the solutions based on mineralized human wastes that mainly contained nitrate nitrogen was insignificantly different from the heat tolerance of the plants grown in standard mineral solutions. A PAR intensity increase from 690 ?mol m -2 s-1 to 1150 ?mol m-2 s-1 enhanced heat tolerance of chufa plant communities, irrespective of the conditions of mineral nutrition under which they had been grown. © 2014 COSPAR. Published by Elsevier Ltd. All rights reserved.

Scopus
Держатели документа:
SB RAS Institute of Biophysics, 660036 Akademgorodok, Krasnoyarsk, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Shklavtsova, E.S.; Ushakova, S.A.; Shikhov, V.N.; Anishchenko, O.V.

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20.

Comparison of chronic low-dose effects of alpha- and beta-emitting radionuclides on marine bacteria / M. A. Selivanova [et al.] // Cent. Eur. J. Biol. - 2014. - Vol. 9, Is. 10. - P951-959, DOI 10.2478/s11535-014-0331-0 . - ISSN 1644-3632
Кл.слова (ненормированные):
Am-241 -- Hormesis -- Luminous bacteria -- Peroxides -- Radiotoxicity -- Tritium
Аннотация: Effects of Americium-241 (241Am), alpha-emitting radionuclide of high specific radioactivity, and tritium (3H), beta-emitting radionuclide, on luminous bacteria Photobacterium phosphoreum were compared. Bioluminescence intensity served as a marker of bacterial physiological activity. Three successive stages in the bioluminescence response to 241Am and 3H were found under conditions of lowdose irradiation: (1) absence of effects, (2) activation, and (3) inhibition. They were interpreted in terms of bacterial response to stressfactor as stress recognition, adaptive response/syndrome, and suppression of physiological function (i.e. radiation toxicity). Times of bioluminescence activation (TBA) and inhibition (TBI) were suggested as parameters to characterize hormesis and toxic stages in a course of chronic low-dose irradiation of the microorganisms. Values of TBA and TBI of 241Am were shorter than those of 3H, revealing higher impact of alpha-irradiation (as compared to beta-irradiation) under comparable radiation doses. Increases of peroxide concentration and NADH oxidation rates in 241Am aquatic solutions were demonstrated; these were not found in tritiated water. The results reveal a biological role of reactive oxygen species generated in water solutions as secondary products of the radioactive decay. The study provides a scientific basis for elaboration of bioluminescence-based assay to monitor radiotoxicity of alpha- and beta-emitting radionuclides in aquatic solutions. © 2014 Versita Warsaw and Springer-Verlag Wien.

Scopus
Держатели документа:
Institute of Biophysics SB RAS, 660036 Krasnoyarsk, Russian Federation
Siberian Federal University, 660041 Krasnoyarsk, Russian Federation
Siberian State Technological University, Lesosibirsk, Krasnoyarsk region, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Selivanova, M.A.; Rozhko, T.V.; Devyatlovskaya, A.N.; Kudryasheva, N.S.

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