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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bondar V.S., Boersma M.G., Golovlev E.L., Vervoort J..., Van Berkel WJH, Finkelstein Z.I., Solyanikova I.P., Golovleva L.A., Rietjens IMCM
Заглавие : (19)F NMR study on the biodegradation of fluorophenols by various Rhodococcus species
Колич.характеристики :12 с
Место публикации : Biodegradation: SPRINGER, 1998. - Vol. 9: NMR in Environmental Sciences Symposium (OCT 24, 1997, EDE, NETHERLANDS), Is. 6. - С. 475-486. - ISSN 0923-9820, DOI 10.1023/A:1008391906885
Примечания : Cited References: 37
Предметные рубрики: NUCLEAR-MAGNETIC-RESONANCE
PSEUDOMONAS-PUTIDA MT-2
PHENOL HYDROXYLASE
BACTERIAL-DEGRADATION
3-OXOADIPATE PATHWAY
FLUOROBENZOIC ACID
CONVERSION
METABOLISM
CYCLOISOMERASES
2-CHLORO-CIS,CIS-MUCONATE
Ключевые слова (''Своб.индексиров.''): biodegradation--fluorophenols--(19)f nmr--oxidative defluorination--rhodococcus species
Аннотация: Of all NMR observable isotopes (19)F is the one perhaps most convenient for studies on biodegradation of environmental pollutants. The reasons underlying this potential of (19)F NMR are discussed and illustrated on the basis of a study on the biodegradation of fluorophenols by four Rhodococcus strains. The results indicate marked differences between the biodegradation pathways of fluorophenols among the various Rhodococcus species. This holds not only for the level and nature of the fluorinated biodegradation pathway intermediates that accumulate, but also for the regioselectivity of the initial hydroxylation step. Several of the Rhodococcus species contain a phenol hydroxylase that catalyses the oxidative defluorination of ortho-fluorinated di- and trifluorophenols. Furthermore, it is illustrated how the (19)F NMR technique can be used as a tool in the process of identification of an accumulated unknown metabolite, in this case most likely 5-fluoromaleylacetate. Altogether, the (19)F NMR technique proved valid to obtain detailed information on the microbial biodegradation pathways of fluorinated organics, but also to provide information on the specificity of enzymes generally considered unstable and, for this reason, not much studied so far.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Lesnyak D.V., Popova L.Y.
Заглавие : A conflict: Induction-inhibition of luminescence in the expression of lux-genes in transgenic bacteria
Колич.характеристики :5 с
Место публикации : Biofizika: MEZHDUNARODNAYA KNIGA, 2002. - Vol. 47, Is. 6. - P1059-1063. - ISSN 0006-3029
Примечания : Cited References: 12
Ключевые слова (''Своб.индексиров.''): salicylate, naphtalene concentration--bacterial bioluminescence, biodegradation
Аннотация: The relationship between the induction of the luminescent operon of lux-genes fused with the naphthalene and salicylate degradation genes and the inhibition of light emission caused by these compounds was studied. The quantitative correlations between these processes manifest themselves in the fact that light intensity linearly increased in a narrow concentration range of the inductor and then decreased due to the inhibition of the luminescence reaction itself, which is not related to the regulation of expression of lux-genes.
WOS
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shishatskaya E.I., Khlusov I.A., Volova T.G.
Заглавие : A hybrid PHB-hydroxyapatite composite for biomedical application: Production, in vitro and in vivo investigation
Место публикации : Journal of Biomaterials Science, Polymer Edition. - 2006. - Vol. 17, Is. 5. - С. 481-498. - ISSN 09205063 (ISSN) , DOI 10.1163/156856206776986242
Ключевые слова (''Своб.индексиров.''): biocompatibility--hydroxyapatite (ha)--phb-hydroxyapatite composite--polyhydroxyalkanoate (pha)--polyhydroxybutyrate (p(3hb))--properties--biocompatibility--differential thermal analysis--electron microscopy--free energy--interfacial energy--physical properties--surface properties--x ray analysis--biomedical application--physicochemical properties--polyhydroxyalkanoate (pha)--polyhydroxybutyrate (phb)--hydroxyapatite--hydroxyapatite--poly(3 hydroxybutyric acid)--polymer--biomaterial--hydroxybutyric acid--adhesion--animal cell--animal tissue--article--biomedicine--bone marrow cell--cell differentiation--cell growth--chemical structure--composite material--controlled study--crystallization--decomposition--electron microscopy--in vitro study--in vivo study--melting point--mouse--nonhuman--ossification--osteoblast--physical chemistry--priority journal--rat--strength--structure analysis--surface property--synthesis--temperature measurement--thermal analysis--tissue engineering--wettability--animal--biomechanics--bioremediation--bone prosthesis--cattle--cell culture--chemistry--cytology--differential scanning calorimetry--drug effect--human--materials testing--prostheses and orthoses--scanning electron microscopy--standard--wistar rat--murinae--animals--biocompatible materials--biodegradation, environmental--biomechanics--bone substitutes--cattle--cells, cultured--differential thermal analysis--durapatite--humans--hydroxybutyrates--materials testing--microscopy, electron, scanning--osteoblasts--prostheses and implants--rats--rats, wistar--surface properties
Аннотация: Samples of a hybrid composite of polyhydroxybutyrate (PHB), a biodegradable polyester, and hydroxyapatite (HA), with different PHB/HA ratios, have been prepared using mechanical-physical method. Electron microscopy, X-ray structure analysis and differential thermal analysis have been used to investigate the structure and physicochemical properties of the composite, depending on the PHB/HA ratio. The properties of the surface of the HA-loaded composite are significantly different from those of the pure polymer. As the HA percentage in the composite increases, free interface energy, the cohesive force, i.e., the strength of the adhesive bond between the composite surface and the water phase, and surface wettability increase. The HA percentage of the composite does not influence its melting temperature, but affects the temperature for the onset of decomposition: as the HA content increases from 0 to 10% (w/w), Td decreases from 260В°C to 225В°C. The degree of crystallinity of PHB/HA increases from 77% to 89% with an increase in the HA fraction from 10% to 50%. Functional properties of the composites have been investigated in vitro and in vivo. The best parameters of growth and differentiation of murine marrow osteoblasts are registered on PHB/HA samples containing 10% and 20% HA. In ectopic bone formation assay it has been proven that the hybrid PHB/HA composites can function as scaffolds and that bone tissue develops on their surface and in pores. В© VSP 2006.
Scopus
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bartsev S. I., Gitelson J. I.
Заглавие : A mathematical model of the global processes of plastic degradation in the World Ocean with account for the surface temperature distribution
Колич.характеристики :4 с
Коллективы : State Assignment for fundamental research of RAS [01201351502]
Место публикации : Dokl. Earth Sci.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2016. - Vol. 466, Is. 2. - С. 153-156. - ISSN 1028-334X, DOI 10.1134/S1028334X16020033. - ISSN 1531-8354(eISSN)
Примечания : Cited References:12. - This work was financially supported in part by the State Assignment for fundamental research of RAS (project no. 01201351502).
Предметные рубрики: BIODEGRADATION
POLYMERS
SOIL
Аннотация: The suggested model of plastic garbage degradation allows us to obtain an estimate of the stationary density of their distribution over the surface of the World Ocean with account for the temperature dependence on the degradation rate. The model also allows us to estimate the characteristic time periods of degradation of plastic garbage and the dynamics of the mean density variation as the mean rate of plastic garbage entry into the ocean varies.
WOS,
Scopus
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sarangova A.B., Somova L.A.
Заглавие : A new enzymatic technique to estimate the efficiency of microbial degradation of pollutants
Место публикации : Advances in Space Research. - 1997. - Vol. 20, Is. 10. - С. 2049-2052. - ISSN 02731177 (ISSN)
Ключевые слова (''Своб.индексиров.''): catalase--hydrogen peroxide--aerobic metabolism--article--bacterium--biomass--bioremediation--enzymology--metabolism--methodology--microbiology--sewage--waste management--water management--aerobiosis--bacteria--biodegradation, environmental--biomass--catalase--hydrogen peroxide--sewage--waste management--water microbiology--water purification
Аннотация: Dynamics of active sludge microorganism activity in aerotanks under chemostat conditions has been studied. Dependence of microorganism catalase activity has been found to depend on residual substrate concentration in proportion to the biomass of microorganisms. Experimental data and field observations has formed the basis to develop a technique to evaluate in relative units the amount of the substrate consumed by biocenosis of the active sludge in the air tanks of purification facilities. В© 1997 COSPAR. Published by Elsevier Science Ltd.
Scopus
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shishatskaya E.I., Nikolaeva E.D., Goreva A.V., Brigham C.J., Volova T.G., Sinskey A.J.
Заглавие : An in vivo study of pha matrices of different chemical composition: Tissue reaction and biodegradation
Место публикации : Cellular Transplantation and Tissue Engineering. - 2012. - Vol. 7, Is. 1. - С. 73-80. - ISSN 1815445X (ISSN)
Ключевые слова (''Своб.индексиров.''): degradable polymer matrices--degradation--phas--polyhydroxyalkanoates--subcutaneous implantation--tissue reaction
Аннотация: The study addresses consequences of subcutaneous implantation of film matrices prepared from different PHAs to laboratory animals. No negative effects of subcutaneous implantation of PHA matrices on physiological and biochemical characteristics of the animals were determined. Independently of the matrices composition and duration of the contact with the internal environment of the organism we did not observe any deviations in the behavior of animals, their growth and development, as well as blood functions. Response of the tissues to PHA matrices was comparable with the response to polylactide, but substantially less expressed at the earlier time periods after implantation. Tissues response to implantation of PHA of all types is characterized by short-term (up to 2 weeks) post-traumatic inflammation with formation of fibrous capsules by 30th-60th days with the thickness less than 100 microns, which get thinner down to 40-60 microns by 180th day as the result of involution. No differences in response of tissues and the whole organism were observed for the matrices produced from the homopolymer of 3-hydroxybutyric acid (P3HB), copolymers of 3-hydroxybutyric and 4-hydroxybutyric acids (P3HB/4HB), 3-hydroxybutyric acid and 3-hydroxyvalerianic acids (P3HB/3HV), 3-hydroxybutyric and 3-hydroxyhexanoate acids (P3HB/3HH). Macrophages and foreign-body giant cells actively participate in the response of the tissues to PHAs. In the studied conditions matrices from the copolymers containing 3-hydroxyhexanoate and 4 hydroxybutyrate were determined as more actively degraded PHA. The next less degraded matrices were matrices from the copolymer of P3HB/3HV and the most resistant were P3HB matrices. The slower degradation of PHA matrices was accompanied by delayed development of giantcells response. The studied PHA matrices can be placed in the following range by their degradation: P3HB/3HH - P3HB/4HB - P3HB/HV - P3HB.
Scopus
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Tikhomirov A.A., Kudenko Y.A., Degermendzhi A.G., Trifonov S.V., Sutormina E.F., Ivanova Y.A.
Заглавие : Assessment of composition and toxicity for plants of gases produced during physicochemical processing of human exometabolites as applied to biotechnical life support systems
Место публикации : Doklady Biochemistry and Biophysics. - 2011. - Vol. 441, Is. 1. - С. 252-254. - ISSN 16076729 (ISSN) , DOI 10.1134/S1607672911060032
Ключевые слова (''Своб.индексиров.''): ammonia--carbon dioxide--nitrogen oxide--oxygen--article--biomass--bioremediation--drug effect--gas--growth, development and aging--human--instrumentation--methodology--microclimate--plant--waste management--ammonia--biodegradation, environmental--biomass--carbon dioxide--ecological systems, closed--gases--humans--life support systems--nitrogen oxides--oxygen--plants--waste management
Scopus
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Boyandin A.N., Rudnev V.P., Ivonin V.N., Prudnikova S.V., Korobikhina K.I., Filipenko M.L., Volova T.G., Sinskey A.J.
Заглавие : Biodegradation of polyhydroxyalkanoate films in natural environments
Место публикации : Macromolecular Symposia. - 2012. - Vol. 320, Is. 1. - С. 38-42. - ISSN 10221360 (ISSN) , DOI 10.1002/masy.201251004
Ключевые слова (''Своб.индексиров.''): biodegradation--biopolymers--microbial degradation--polyhydroxyalkanoates--acinetobacters--acremonium--alcaligenes--burkholderia--degradation rate--degrading activities--degrading bacteria--enterobacter--hydroxyvalerate--mass loss--microbial degradation--micromycetes--natural environments--paecilomyces--poly-3-hydroxybutyrate--poly-hydroxyalkanoate--polyhydroxyalkanoates--siberia--south china sea--stenotrophomonas--trichoderma--tropical soils--viet nam--xanthomonas--bacteria--bacteriology--biopolymers--degradation--seawater--soils--tropics--biodegradation
Аннотация: Biodegradation of film specimens from polyhydroxyalkanoates (PHAs) of two types - poly-3-hydroxybutyrate (PHB) and poly-3-hydroxybutyrate-co-3- hydroxyvalerate (PHBV) - was analysed in different environments: tropical sea waters of the South China Sea (Nha Trang, Vietnam) and soils in the environs of Hanoi (Vietnam), Nha Trang (Vietnam) and Krasnoyarsk (Siberia, Russia). In seawater, the mass loss of the specimens of both types was almost equal. However, in tropical soils, PHB degraded quicker than PHBV. In the Siberian soil, the degradation rate of the PHBV was generally higher than that of PHBV. Analysis of molecular mass of PHA specimens showed its decreasing during biodegradation. In the tropical sea conditions, PHA degrading microorganisms were represented by bacteria of Enterobacter, Bacillus and Gracilibacillus genera. Among PHA degrading bacteria, Burkholderia, Alcaligenes, Bacillus, Mycobacterium and Streptomyces genera were identified in Vietnamese soils, and Variovorax, Stenotrophomonas, Acinetobacter, Pseudomonas, Bacillus and Xanthomonas genera in Siberian soils. Micromycetes of Gongronella, Paecilomyces, Penicillium and Trichoderma genera exhibited PHA degrading activity in Vietnamese soils, and Paecilomyces, Penicillium, Acremonium, Verticillium and Zygosporium genera - in Siberian soils. Copyright В© 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Scopus
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volova T.G., Boyandin A.N., Vasil'ev A.D., Karpov V.A., Kozhevnikov I.V., Prudnikova S.V., Rudnev V.P., Xuan B.B., Dung V.V., Gitel'zon I.I.
Заглавие : Biodegradation of polyhydroxyalkanoates (PHAs) in the South China Sea and identification of PHA-degrading bacteria
Место публикации : Microbiology. - 2011. - Vol. 80, Is. 2. - С. 252-260. - ISSN 00262617 (ISSN) , DOI 10.1134/S0026261711020184
Ключевые слова (''Своб.индексиров.''): biodegradation in marine environments--microbial pha degraders--pha--polyhydroxyalkanoates--bacillus (bacterium)--bacillus sp.--bacteria (microorganisms)--enterobacter--enterobacter cloacae--gracilibacillus--prospect hill virus
Аннотация: The biodegradation patterns of two types of PHA, a 3-hydroxybutyrate (3-PHB) polymer and a 3-hydroxybutyrate and 3-hydroxyvalerate (3-PHB/3-PHV) copolymer, were studied in tropical marine environments (Dam Bay, South China Sea, Nha Trang, Vietnam). No reliable differences in the degradation of 3-PHB and 3-PHB/3-PHV were revealed. It was shown that the degradation process depended mainly on the shape of a polymer product and its production method: the degradation of polymer films was found to be more active than that of molded solids. A decrease in the molecular mass of both types of PHA was detected in the course of the degradation of PHA samples. However, the degree of PHA crystallinity did not change; that is, the levels of degradation of both the amorphous and crystalline phases of PHA were almost the same. Among microbial PHA degraders, three bacterial strains, Bacillus sp. IBP-V002, Enterobacter cloacae sp. IBP-V001, and Gracilibacillus sp. IBP-V003, were identified based on the results of morphological, biochemical, and molecular phylogenetic analyses. The ability of the representatives of the genera Gracilibacillus and Enterobacter to degrade PHA was revealed for the first time. В© 2011 Pleiades Publishing, Ltd.
Scopus
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volova T.G., Boyandin A.N., Vasiliev A.D., Karpov V.A., Prudnikova S.V., Mishukova O.V., Boyarskikh U.A., Filipenko M.L., Rudnev V.P., Ba Xuan B., Vit Dung V., Gitelson I.I.
Заглавие : Biodegradation of polyhydroxyalkanoates (PHAs) in tropical coastal waters and identification of PHA-degrading bacteria
Место публикации : Polymer Degradation and Stability. - 2010. - Vol. 95, Is. 12. - С. 2350-2359. - ISSN 01413910 (ISSN) , DOI 10.1016/j.polymdegradstab.2010.08.023
Ключевые слова (''Своб.индексиров.''): biopolymers in marine environment--degradation of polymers--pha properties--pha-degrading microorganisms--polyhydroxyalkanoates, pha--16s rrna--3-hydroxybutyric acid--amorphous phase--bacillus sp--biodegradation rate--chemical compositions--coastal waters--degradation rate--degrading bacteria--degree of crystallinity--enterobacter--hydroxyvalerate--marine environment--pha properties--pha-degrading microorganisms--polydispersity indices--polyhydroxyalkanoates--polymer chains--preparation technique--sole carbon source--south china sea--viet nam--acids--bacteriology--biodegradable polymers--biodegradation--biomolecules--biopolymers--microorganisms--organic polymers--polydispersity--polymer films--polymers--rna--seawater--degradation
Аннотация: Biodegradability patterns of two PHAs: a polymer of 3-hydroxybutyric acid (3-PHB) and a copolymer of 3-hydroxybutyric and 3-hydroxyvaleric acids (3-PHB/3-PHV) containing 11 mol% of hydroxyvalerate, were studied in the tropical marine environment, in the South China Sea (Nha Trang, Vietnam). No significant differences have been observed between degradation rates of 3-PHB and 3-PHB/3-PHV specimens; it has been found that under study conditions, biodegradation is rather influenced by the shape of the polymer item and the preparation technique than by the chemical composition of the polymer. Biodegradation rates of polymer films in seawater have been found to be higher than those of compacted pellets. As 3-PHB and 3-PHB/3-PHV are degraded and the specimens lose their mass, molecular weight of both polymers is decreased, i.e. polymer chains get destroyed. The polydispersity index of the PHAs grows significantly. However, the degree of crystallinity of both PHAs remains unchanged, i.e. the amorphous phase and the crystalline one are equally disintegrated. PHA-degrading microorganisms were isolated using the clear-zone technique, by inoculating the isolates onto mineral agar that contained PHA as sole carbon source. Based on the 16S rRNA analysis, the PHA-degrading strains were identified as Enterobacter sp. (four strains), Bacillus sp. and Gracilibacillus sp.В© 2010 Elsevier Ltd. All rights reserved.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Boyandin A. N., Prudnikova S.V., Filipenko M.L., Khrapov E.A., Vasiliev A. D., Volova, Tatiana G.
Заглавие : Biodegradation of polyhydroxyalkanoates by soil microbial communities of different structures and detection of PHA degrading microorganisms
Коллективы : Government of the Russian Federation [11.G34.31.0013]; Presidium of the Siberian Branch of Russian Academy of Sciences [96]
Место публикации : Appl. Biochem. Microbiol.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2012. - Vol. 48, Is. 1. - С. 28-36. - 9. - ISSN 0003-6838, DOI 10.1134/S0003683812010024
Примечания : Cited References: 39. - The work was supported by the project initiated by the Government of the Russian Federation for governmental support of scientific research conducted under the guidance of leading scientists at Russian institutions of higher learning (Agreement No. 11.G34.31.0013) and the Program of Integrated Research of the Presidium of the Siberian Branch of Russian Academy of Sciences (project no. 96).
Предметные рубрики: POLY-BETA-HYDROXYBUTYRATE
CHAIN-LENGTH POLYHYDROXYALKANOATES
DEGRADATION
FILMS
POLY(3-HYDROXYBUTYRATE-CO-3-HYDROXYVALERATE)
BACTERIA
ACID
Аннотация: Biodegradation of microbial linear polymers of hydroxyalkanoic acids (polyhydroxyalkanoates, PHAs) by soil microbial communities of different structures has been studied during two field seasons in different weather conditions. This process was shown to be influenced by the polymer chemical composition, temperature, humidity, and the microbial soil component. The PHA degradation was accompanied by a decrease in the polymer molecular weight and an increase in the degree of crystallinity, indicating the preferential destruction of the amorphous phase compared to the crystalline one. The quantity of the true PHA destructors developing at the surface of the polymer samples was lower than the quantity of accompanying bacteria. The dominant PHA degrading microorganisms under the test conditions were identified as bacteria of the genera Variovorax, Stenotrophomonas, Acinetobacter, Pseudomonas, Bacillus, and Xanthomonas and as micromycetes from Penicillium, Paecilomyces, Acremonium, Verticillium, and Zygosporium.
WOS,
SCOPUS,
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zolotukhin I.G., Tikhomirov A.A., Kudenko Yu.A., Gribovskaya I.V.
Заглавие : Biological and physicochemical methods for utilization of plant wastes and human exometabolites for increasing internal cycling and closure of life support systems
Место публикации : Advances in Space Research. - 2005. - Vol. 35, Is. 9 SPEC. ISS. - С. 1559-1562. - ISSN 02731177 (ISSN) , DOI 10.1016/j.asr.2005.01.006
Ключевые слова (''Своб.индексиров.''): blss--desalting--higher plants--nacl utilization--sls--biomass--crops--decomposition--electrodialysis--harvesting--metabolites--soils--wastes--blss--higher plants--nacl utilization--sls--plants (botany)--biomass--decay--deionization--harvesting--plants--soil--wastes--wheat--sodium chloride--article--biomass--bioremediation--culture medium--feces--growth, development and aging--human--metabolism--methodology--microbiology--microclimate--urine--waste management--wheat--biodegradation, environmental--biomass--culture media--ecological systems, closed--feces--humans--life support systems--sodium chloride--soil microbiology--triticum--urine--waste management
Аннотация: Wheat was cultivated on soil-like substrate (SLS) produced by the action of worms and microflora from the inedible biomass of wheat. After the growth of the wheat crop, the inedible biomass was restored in SLS and exposed to decomposition ("biological" combustion) and its mineral compounds were assimilated by plants. Grain was returned to the SLS in the amount equivalent to human solid waste produced by consumption of the grain. Human wastes (urine and feces) after physicochemical processing turned into mineralized form (mineralized urine and mineralized feces) and entered the plants' nutrient solution amounts equal to average daily production. Periodically (once every 60-70 days) the nutrient solution was partly (up to 50%) desalinated by electrodialysis. Due to this NaCl concentration in the nutrient solution was sustained at a fixed level of about 0.26%. The salt concentrate obtained could be used in the human nutrition through NaCl extraction and the residuary elements were returned through the mineralized human liquid wastes into matter turnover. The control wheat cultivation was carried out on peat with use of the Knop nutrient solution. Serial cultivation of several wheat vegetations within 280 days was conducted during the experiment. Grain output varied and yield/harvest depended, in large part, upon the amount of inedible biomass returned to SLS and the speed of its decomposition. After achieving a stationary regime, (when the quantity of wheat inedible biomass utilized during vegetation in SLS is equal to the quantity of biomass introduced into SLS before vegetation) grain harvest in comparison with the control was at most 30% less, and in some cases was comparable to the control harvest values. The investigations carried out on the wheat example demonstrated in principle the possibility of long-term functioning of the LSS photosynthesizing link based on optimizations of biological and physicochemical methods of utilization of the human and plants wastes. The possibilities for the use of these technologies for the creation integrated biological-physicochemical LSS with high closure degree of internal matter turnover are discussed in this paper. В© 2005 Published by Elsevier Ltd on behalf of COSPAR.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pechurkin N.S., Shirobokova I.M.
Заглавие : Closed artificial ecosystems as a means of ecosystem studies for earth and space needs
Место публикации : Advances in Space Research. - 2001. - Vol. 27, Is. 9. - С. 1497-1504. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(01)00244-7
Ключевые слова (''Своб.индексиров.''): artificial ecosystem--bioremediation--biosphere--ecosystem--environmental monitoring--model--bioremediation--ecology--ecosystems--health--biosphere--space research--artificial ecosystem--biodegradation, environmental--earth (planet)--ecological systems, closed--ecology--ecosystem--energy transfer--environmental microbiology--life support systems--population dynamics--yeasts
Аннотация: Closed Artificial ecosystems (CAES) have good prospects for wide use as new means for quantitative studies of different types of both natural ecosystems and man-made ones. The paper deals with the discussion of three points of CAES applications. The first one is of importance for theoretical ecology development and is connected with bringing together В«holisticВ» and В«merologicalВ» approaches in ecosystems studies. Using CAES, we can combine both approaches, taking into account the biotic turnover of limiting substrates which few in number even for complicated natural ecosystems. The second CAES use concerns the development of В«ecosystems healthВ» concept and application of a key-factor-approach for the indication and measurement of healthy unhealthy state and functioning of ecosystems or their links. The third use is more of an applied nature, oriented to the intensification of bioremediation or biodepollution processes in different types of ecosystems, including the global biosphere. В© 2001 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Voinova O..., Gladyshev M.I., Volova T.G.
Заглавие : Comparative study of PHA degradation in natural reservoirs having various types of ecosystems
Место публикации : Macromol. Symp.: WILEY-V C H VERLAG GMBH, 2008. - Vol. 269: 4th European Symposium on Biopolymers (OCT 02-04, 2007, Kusadasi, TURKEY). - С. 34-37. - 4. - ISSN 1022-1360, DOI 10.1002/masy.zoo850906
Примечания : Cited References: 15
Предметные рубрики: POLYHYDROXYALKANOATES
BIODEGRADATION
DISAPPEARANCE
POLYESTERS
PHENOL
Ключевые слова (''Своб.индексиров.''): biodegradable polyesters--ecosystem--natural environment--pha--water reservoir
Аннотация: The kinetics of polyhydroxyalkanoate (PHA) degradation in natural environment in two water reservoirs having various ecological characteristics was studied. It was shown that biodegradation of polymer essentially depends on the environment temperature and inorganic composition of water. The processes of polymer degradation under aerobic and anaerobic conditions were compared. The polymer degradation was slower under anaerobic conditions.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Voinova O., Gladyshev M., Volova T.G.
Заглавие : Comparative study of PHA degradation in natural reservoirs having various types of ecosystems
Место публикации : Macromolecular Symposia. - 2008. - Vol. 269, Is. 1. - С. 34-37. - ISSN 10221360 (ISSN) , DOI 10.1002/masy.200850906
Ключевые слова (''Своб.индексиров.''): biodegradable polyesters--ecosystem--natural environment--pha--water reservoir--abs resins--biochemistry--biodegradable polymers--biodegradation--biopolymers--biotechnology--degradation--ecology--ecosystems--esters--polymers--aerobic and anaerobic conditions--anaerobic conditions--biodegradable polyesters--comparative studies--ecological characteristics--environment temperatures--natural environment--natural environments--pha--polyhydroxyalkanoate--polymer degradations--water reservoir--water reservoirs--reservoirs (water)
Аннотация: The kinetics of polyhydroxyalkanoate (PHA) degradation in natural environment in two water reservoirs having various ecological characteristics was studied. It was shown that biodegradation of polymer essentially depends on the environment temperature and inorganic composition of water. The processes of polymer degradation under aerobic and anaerobic conditions were compared. The polymer degradation was slower under anaerobic conditions. Copyright В© 2008 WILEY-VCH Verlag GmbH & Co. KGaA.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Boyandin, Anatoly N., Kazantseva, Eugenia A.
Заглавие : Constructing slow-release formulations of herbicide metribuzin using its co-extrusion with biodegradable polyester poly-epsilon-caprolactone
Колич.характеристики :10 с
Коллективы : Project "Agropreparations of the new generation: a strategy of construction and realization" [074-02-2018-328]; Government of the Russian Federation [220]
Место публикации : J. Environ. Sci. Health Part B-Pestic. Contam. Agric. Wastes: TAYLOR & FRANCIS INC, 2021. - Article in press. - ISSN 0360-1234, DOI 10.1080/03601234.2021.1911206. - ISSN 1532-4109(eISSN)
Примечания : Cited References:43. - This study was financially supported by Project "Agropreparations of the new generation: a strategy of construction and realization" (Agreement No 074-02-2018-328) in accordance with Resolution No 220 of the Government of the Russian Federation of April 9, 2010, "On measures designed to attract leading scientists to the Russian institutions of higher learning".
Аннотация: Different technologies to prepare long term pesticide forms include polymer coating, preparing composites and encapsulating pesticides in nanoparticles. A simple and low-cost method was proposed to obtain slow-release formulations by co-extrusion of a pesticide with a biodegradable polymer at a temperature above the melting points of both components. A herbicide metribuzin and low-melting polyester poly-epsilon-caprolactone were chosen for this work. Formulations containing 10%, 20%, and 40% herbicide were prepared. During 7 days of their exposition in water, it was released from 81% to 96% of initially loaded metribuzin; the highest release was detected for 40%-loaded forms. Biodegradation of the constructs and pesticide release were further studied in the model soil. Degradation rates of the specimens increased with an increase in pesticide content, from 9% to 20% over 14 weeks for the 10%/20%-loaded and the 40%-loaded specimens, respectively. The release of metribuzin reached, respectively, 37-38% and 55%. The herbicide content in soil was lower due to its partial degradation in soil; it reached 23-25% and 33%, respectively, from initially loaded into the polymer matrix. Release kinetics of metribuzin in water as in soil best fitted the First-order model. The used approach is promising for obtaining long-term release formulations for soil applications.
WOS
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Boyandin A. N., Kazantseva E. A.
Заглавие : Constructing slow-release formulations of herbicide metribuzin using its co-extrusion with biodegradable polyester poly-ε-caprolactone
Место публикации : J. Environ. Sci. Health Part B Pestic. Food Contamin. Agric. Wastes: Bellwether Publishing, Ltd., 2021. - Article in press. - ISSN 03601234 (ISSN), DOI 10.1080/03601234.2021.1911206
Аннотация: Different technologies to prepare long term pesticide forms include polymer coating, preparing composites and encapsulating pesticides in nanoparticles. A simple and low-cost method was proposed to obtain slow-release formulations by co-extrusion of a pesticide with a biodegradable polymer at a temperature above the melting points of both components. A herbicide metribuzin and low-melting polyester poly-?-caprolactone were chosen for this work. Formulations containing 10%, 20%, and 40% herbicide were prepared. During 7 days of their exposition in water, it was released from 81% to 96% of initially loaded metribuzin; the highest release was detected for 40%-loaded forms. Biodegradation of the constructs and pesticide release were further studied in the model soil. Degradation rates of the specimens increased with an increase in pesticide content, from 9% to 20% over 14 weeks for the 10%/20%-loaded and the 40%-loaded specimens, respectively. The release of metribuzin reached, respectively, 37–38% and 55%. The herbicide content in soil was lower due to its partial degradation in soil; it reached 23–25% and 33%, respectively, from initially loaded into the polymer matrix. Release kinetics of metribuzin in water as in soil best fitted the First-order model. The used approach is promising for obtaining long-term release formulations for soil applications. © 2021 Taylor & Francis Group, LLC.
Scopus
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volova, Tatiana, Prudnikova, Svetlana, Boyandin, Anatoly, Zhila, Natalia, Kiselev, Evgeniy, Shumilova, Anna, Baranovskiy, Sergey, Demidenko, Aleksey, Shishatskaya, Ekaterina, Thomas, Sabu
Заглавие : Constructing Slow-Release Fungicide Formulations Based on Poly(3-hydroxybutyrate) and Natural Materials as a Degradable Matrix
Колич.характеристики :12 с
Коллективы : Project "Agro-preparations of the New Generation: A Strategy of Construction and Realization" [074-02-2018-328]; Resolution 220 of the Government of the Russian Federation of April 9, 2010, "On Measures Designed To Attract Leading Scientists to the Russian Institutions of Higher Learning"
Место публикации : J. Agric. Food Chem.: AMER CHEMICAL SOC, 2019. - Vol. 67, Is. 33. - С. 9220-9231. - ISSN 0021-8561, DOI 10.1021/acs.jafc.9b01634. - ISSN 1520-5118(eISSN)
Примечания : Cited References:52. - This study was financially supported by Project "Agro-preparations of the New Generation: A Strategy of Construction and Realization" (Agreement 074-02-2018-328) in accordance with Resolution 220 of the Government of the Russian Federation of April 9, 2010, "On Measures Designed To Attract Leading Scientists to the Russian Institutions of Higher Learning".
Предметные рубрики: BIODEGRADABLE POLY-3-HYDROXYBUTYRATE
CHITOSAN NANOPARTICLES
Аннотация: Slow-release fungicide formulations (azoxystrobin, epoxiconazole, and tebuconazole) shaped as pellets and granules in a matrix of biodegradable poly(3-hydroxybutyrate) and natural fillers (clay, wood flour, and peat) were constructed. Infrared spectroscopy showed no formation of chemical bonds between components in the experimental formulations. The formulations of pesticides had antifungal activity against Fusarium verticillioides in vitro. A study of biodegradation of the experimental fungicide formulations in the soil showed that the degradation process was mainly influenced by the type of formulation without significant influence of the type of filler. More active destruction of the granules led to a more rapid accumulation of fungicides in the soil. The content of fungicides present in the soil as a result of degradation of the formulations and fungicide release was determined by their solubility. Thus, all formulations are able to function in the soil for a long time, ensuring gradual and sustained delivery of fungicides.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Boyandin A. N., Kazantseva E. A.
Заглавие : Constructing Slow-Release Metribuzin Formulations by Co-extrusion of the Pesticide with Poly-?-Caprolactone
Место публикации : Macromol. Sympos.: Wiley-VCH Verlag, 2021. - Vol. 395, Is. 1. - Ст.2000283. - ISSN 10221360 (ISSN), DOI 10.1002/masy.202000283
Аннотация: A simple and low-cost method of obtaining slow-release pesticide formulations is proposed by co-extrusion of a herbicide metribuzin with a low-melting biodegradable polyester poly-?-caprolactone, at a temperature above the melting points of both components. Formulations containing 10%, 20%, and 40% herbicide are prepared. Metribuzin release in water during 7 days of exposition reached 81% from the formulations with the 10% loading and 96% from the specimens with the 40% herbicide loading. Biodegradation and pesticide release from the polymer constructs are studied in the model soil for 14 weeks. Degradation rates of the specimens increased with an increase in pesticide content: between 9% for the 10%-loaded specimen and 20% for the 40%-loaded specimen over 14 weeks. The release of metribuzin from the specimens with the 10–20% and 40% loadings reached 37–38% and 55%, respectively; thus, taking into account soil degradation of the herbicide, the herbicide content in soil reached 23–25% and 33%, respectively, of the initially loaded into the polymer matrix. The used approach is promising to obtain long-term release formulations for soil application. © 2021 Wiley-VCH GmbH
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Boyandin, Anatoly Nikolayevich, Kazantseva, Eugenia Andreevna
Заглавие : Constructing Slow-Release Metribuzin Formulations by Co-extrusion of the Pesticide with Poly-epsilon-Caprolactone
Колич.характеристики :3 с
Коллективы : Government of the Russian Federation [220, 074-02-2018-328]
Место публикации : Macromol. Symp.: WILEY-V C H VERLAG GMBH, 2021. - Vol. 395: 4th International Conference on Progress on Polymers and Composites (NOV 26-28, 2020, ELECTR NETWORK), Is. 1. - Ст.2000283. - ISSN 1022-1360, DOI 10.1002/masy.202000283. - ISSN 1521-3900(eISSN)
Примечания : Cited References:6. - This study was financially supported by Project "Agropreparations of the new generation: a strategy of construction and realization" (Agreement No 074-02-2018-328) in accordance with Resolution No 220 of the Government of the Russian Federation of April 9, 2010, "On measures designed to attract leading scientists to the Russian institutions of higher learning".
Аннотация: A simple and low-cost method of obtaining slow-release pesticide formulations is proposed by co-extrusion of a herbicide metribuzin with a low-melting biodegradable polyester poly-epsilon-caprolactone, at a temperature above the melting points of both components. Formulations containing 10%, 20%, and 40% herbicide are prepared. Metribuzin release in water during 7 days of exposition reached 81% from the formulations with the 10% loading and 96% from the specimens with the 40% herbicide loading. Biodegradation and pesticide release from the polymer constructs are studied in the model soil for 14 weeks. Degradation rates of the specimens increased with an increase in pesticide content: between 9% for the 10%-loaded specimen and 20% for the 40%-loaded specimen over 14 weeks. The release of metribuzin from the specimens with the 10-20% and 40% loadings reached 37-38% and 55%, respectively; thus, taking into account soil degradation of the herbicide, the herbicide content in soil reached 23-25% and 33%, respectively, of the initially loaded into the polymer matrix. The used approach is promising to obtain long-term release formulations for soil application.
WOS
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