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    The physicochemical properties of polyhydroxyalkanoates with different chemical structures / T. G. Volova [et al.] // Polym. Sci. Ser. A. - 2013. - Vol. 55, Is. 7. - P. 427-437, DOI 10.1134/S0965545X13070080. - Cited References: 41 . - 11. - ISSN 0965-545X
   Перевод заглавия: Физико-химические свойства полигидроксиалканоатов с разной химической структурой

РУБ Polymer Science
Рубрики:
MICROBIAL SYNTHESIS
   RALSTONIA-EUTROPHA
   COMAMONAS-ACIDOVORANS
   AEROMONAS-HYDROPHILA
   POLY(3-HYDROXYBUTYRATE-CO-4-HYDROXYBUTYRATE)
   BIOSYNTHESIS
   COPOLYMERS
   POLY(3-HYDROXYBUTYRATE-CO-3-HYDROXYHEXANOATE)
   POLYMERS
Аннотация: A set of polyhydroxyalkanoates are synthesized, and a comparative study of their physicochemical properties is performed. The molecular masses and polydispersities of polyhydroxyalkanoates are found to be independent of their chemical structures. It is shown that the temperature characteristics and degrees of crystallinity of polyhydroxyalkanoates are affected by the chemical compositions of the monomers and their quantitative contents in the polymers. The incorporation of 4-hydroxybutyrate, 3-hydroxyvalerate, and 3-hydroxyhexanoate units into the chain of poly(3-hydroxybutyrate) decreases its melting point and thermal degradation temperature relative to these parameters of a homogeneous poly(3-hydroxybutyrate) sample (175 +/- 5A degrees C and 275 +/- 5A degrees C, respectively). The higher the content of the second monomer units in the poly(3-hydroxybutirate) chain, the greater the changes. The degrees of crystallinity of polyhydroxyalkanoate copolymers are generally lower than that of poly(3-hydroxybutyrate) (75 +/- 5%). The effect on the ratio of the amorphous and crystalline phases of the copolymer samples becomes more pronounced in the series 3-hydroxy-valerate-3-hydroxyhexanoate-4-hydroxybutyrate. The prepared samples exhibit different properties ranging from rigid thermoplastic materials to engineering elastomers.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Inst Biophys, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Inst Fundamental Biol & Biotechnol, Krasnoyarsk 660041, Russia
Siberian State Technol Univ, Krasnoyarsk 660049, Russia
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
MIT, Cambridge, MA 02139 USA;

Доп.точки доступа:
Volova, T. G.; Волова, Татьяна Григорьевна; Zhila, N. O.; Жила, Наталья Олеговна; Shishatskaya, E. I.; Шишацкая, Екатерина Игоревна; Mironov, P. V.; Vasil'ev, A. D.; Васильев, Александр Дмитриевич; Sukovatyi, A. G.; Суковатый, Алексей Григорьевич; Sinskey, A. J.
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Structural investigation of biogenic ferrihydrite nanoparticles dispersion / M. . Balasoiu [et al.] // Optoelectron. Adv. Mater.-Rapid Commun. - 2010. - Vol. 4, Is. 12. - P. 2136-2139. - Cited References: 21. - The financial support from the Grants No.224 it.7 and No.56 it.5 of the Romanian Governmental Plenipotentiary at JINR and the support from the JINR theme No. 04-4-1069-2009/2011 are acknowledged. S.S. Abramchyuk (Advanced Technologies Center, Moscow) for the HRTEM images is acknowledged. . - ISSN 1842-6573

РУБ Materials Science, Multidisciplinary + Optics
Рубрики:
S-LAYER PROTEINS
   METAL NANOPARTICLES
   BIOLOGICAL SYNTHESIS
   BIOSYNTHESIS
   MICROORGANISMS
   FUNGI
Кл.слова (ненормированные):
Bacterial nanoparticles -- Ferrihydrite -- Small angle X-ray scattering -- High-resolution electron microscopy
Аннотация: Structural properties of biogenic ferrihydrite nanoparticles produced by bacteria Klebsiella oxytoca are investigated. Investigations of morphology and size of particles dispersed in water by means of high-resolution transmission electron microscopy and small angle X-ray scattering measurements were performed. By model calculations followed by fitting procedure the structural parameters of a cylinder of radius R = 4.87 +/- 0.02 nm and height L = 2.12 +/- 0.04 nm are obtained.

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Держатели документа:
[Balasoiu, M.
Kuklin, A. I.
Soloviov, D. V.
Arzumanian, G. M.] Joint Inst Nucl Res, Dubna 141980, Russia
[Ischenko, L. A.
Stolyar, S. V.
Iskhakov, R. S.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Raikher, Y. L.] RAS, Ural Branch, Inst Continuum Media Mech, Perm 614013, Russia
[Kurkin, T. S.] RAS, Inst Synthet Polymer Mat, Moscow 117393, Russia
[Balasoiu, M.
Aranghel, D.] Natl Inst Phys & Nucl Engn, Bucharest, Romania
[Stolyar, S. V.
Iskhakov, R. S.] RAS, Siberian Branch, Inst Phys, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Balasoiu, M.; Ischenko, L. A.; Stolyar, S. V.; Столяр, Сергей Викторович; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Raikher, Y. L.; Kuklin, A. I.; Soloviov, D. V.; Kurkin, T. S.; Aranghel, D.; Arzumanian, G. M.
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Production and magnetic properties of biogenic ferrihydrite nanoparticles / S. V. Stolyar [et al.] // J. Optoelectron. Adv. Mater. - 2015. - Vol. 17, Is. 7-8. - P. 968-972. - Cited References:14. - Support by project No3072 of the basic part of the state task of Ministry of Education and Science of Russian Federation is acknowledged. . - ISSN 1454. - ISSN 1841-7132. -

РУБ Materials Science, Multidisciplinary + Optics + Physics, Applied
Рубрики:
FERRITIN
Кл.слова (ненормированные):
Magnetic nanoparticles -- Biosynthesis -- Ferrihydrite -- superparamagnetics
Аннотация: In present work the magnetic properties of biomineral ferrihydrite nanoparticles (biomass), produced by Klebsiella oxytoca strain and the nanoparticles obtained by drying the sol (so!), made on the basis of biomineral ferrihydrite nanoparticles have been studied. Ferrihydrite nanoparticles are formed on the surface of the bacterial cell.

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Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
SB RAS, Int Sci Ctr Organism Extreme States Res Attached, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Stolyar, S. V.; Столяр, Сергей Викторович; Bayukov, O. A.; Баюков, Олег Артемьевич; Balaev, D. A.; Балаев, Дмитрий Александрович; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Ishchenko, L. A.; Ищенко, Л. А.; Ladygina, V. P.; Yaroslavtsev, R. N.; Ministry of Education and Science of Russian Federation [3072]
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Biosynthesis and properties of P(3HB-co-3HV-co-3H4MV) produced by using the wild-type strain Cupriavidus eutrophus B-10646 / T. Volova [et al.] // J. Chem. Technol. Biotechnol. - 2019. - Vol. 94, Is. 1. - P. 195-203, DOI 10.1002/jctb.5763. - Cited References: 32. - This study was supported financially 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’. . - ISSN 0268-2575
Кл.слова (ненормированные):
polyhydroxyalkanoates -- 3-hydroxy-4-methylvalerate -- synthesis -- physicochemical properties
Аннотация: BACKGROUND: Polyhydroxyalkanoates (PHA) containing 3-hydroxy-4-methylvalerate (3H4MV) have better processing properties than other PHA types and were not prone to ageing. The main challenge in the production of these polymers is to simultaneously achieve high cell biomass, high polymer content, and high molar fraction of 3H4MV. The aim of this study was to investigate the production of poly(3-hydroxybutyrate-co-3-hydroxyvalerate-co-3-hydroxy-4-methylvalerate) [P(3HB-co-3 HV-co-3H4MV)] by Cupriavidus eutrophus B-10646, synthesize polymers with different contents of 3H4MV and investigate their properties. RESULTS: It was shown that 4-methylvalerate (4MV, the precursor substrate) concentration in the culture medium must not be higher than 1 g L−1, and that 4MV must be carefully dosed, with at least 10–12 h intervals between supplementations. A series of polymers with molar fractions of 3H4MV between 2.7 and 11.3 mol% was synthesized. Degrees of crystallinity, molecular weight characteristics, and thermal properties of the polymers have been investigated as dependent on proportions of monomers. CONCLUSION: The content of 3H4MV depends on the concentration of 4MV and conditions of carbon nutrition. The molar fraction of 3H4MV had a strong effect on the crystalline to amorphous region ratio. PHA containing 3H4MV specimens synthesized in this study had a degree of crystallinity of below 50%, which remained unchanged for 2.5 years.

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Держатели документа:
Siberian Federal University, Krasnoyarsk, Russian Federation
Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, Krasnoyarsk, Russian Federation
L.V. Kirenskii Institute of Physics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, Krasnoyarsk, Russian Federation
Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, Krasnoyarsk, Russian Federation
International and Inter University Centre of Nanoscience and Nanotechnology, Mahatam Gandhi University, Kottyam, India

Доп.точки доступа:
Volova, T.; Menshikova, O.; Zhila, N.; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Kiselev, E.; Peterson, I.; Shishatskaya, E.; Thomas, S.
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    Киселев, Евгений Геннадьевич.
    Синтез и характеристики многокомпонентных ПГА / Е. Г. Киселев, А. Д. Васильев, Т. Г. Волова // Журн. СФУ. Биология. - 2021. - Т. 14, № 1. - С. 97-113 ; J. Sib. Fed. Univ. Biol., DOI 10.17516/1997-1389-0325. - Библиогр.: 32. - Работа выполнена по гранту No 19-43-240012 «Биологические и физические принципы получения биоматериалов новой генерации» при поддержке РФФИ и ККФН и госзаданию Министерства науки и высшего образования РФ No FSRZ-2020-0006. В работе использовано оборудование Центра коллективного пользования приборами ФИЦ «КНЦ СО РАН» . - ISSN 1997-1389. - ISSN 2313-5530
   Перевод заглавия: Synthesis and Characterization of Multicomponent PHAs
Кл.слова (ненормированные):
полигидроксиалканоаты (ПГА) -- биосинтез -- субстраты-предшественники -- сополимеры -- физико-химические свойства -- polyhydroxyalkanoates (PHAs) -- biosynthesis -- precursor substrates -- copolymers -- physicochemical properties
Аннотация: В культуре бактерий Cupriavidus necator B10646 в режиме синтеза резервных полигидроксиалканоатов при включении в состав ростовой среды, помимо основного субстрата, глюкозы, субстратов-предшественников различных мономеров монокарбоновых кислот – солей валериановой и гексановой кислот, пропионата, γ-бутиролактона, синтезировано семейство трех- и четырехкомпонентных полимеров с различным набором и соотношением мономеров и исследованы физико-химические свойства. Трехкомпонентные образцы были образованы мономерами 3-гидроксибутирата (3ГБ), 3-гидроксивалерата (3ГВ), 4-гидроксибутирата (4ГБ) или 3-гидроксигексаноата (3ГГ) и имели следующие составы: П(3ГБ/3ГВ/4ГБ) и П(3ГБ/3ГВ/4ГГ); четырехкомпонентные сополимеры имели состав П(3ГБ/3ГВ/4ГБ/3ГГ). Все сополимерные образцы, независимо от состава и соотношения мономеров, обладали сниженными значениями молекулярной массы и повышенными значениями полидисперсности по сравнению с высококристалличным гомополимером 3-гидроксибутирата, но сохраняли свойства термостабильности, имея разрыв между температурой плавления и термической деградации не менее 100-110 °С. Включение в С-цепь 3ГБ мономеров 3ГВ, 4ГБ и 3ГГ вызывало значительные изменения соотношения кристаллической и аморфной фаз и снижение степени кристалличности (Сх), зависящие от типа мономеров и их содержания в сополимере. Максимальное снижение Сх (до 9-17 %) зарегистрировано у трехкомпонентных образцов П(3ГБ/3ГВ/4ГБ), у четырехкомпонентных сополимеров П(3ГБ/3ГВ/4ГБ/3ГГ) – до 30-36 %. Доказана возможность синтеза полимеров разного, в том числе нового, состава, существенно различающихся базовыми свойствами.
Cupriavidus necator B10646 bacterial cells were cultivated in the mode of synthesis of the reserve polyhydroxyalkanoates (PHAs) in the growth medium that contained, in addition to glucose as the main substrate, precursor substrates of the monomers of various monocarboxylic acids – salts of valeric and hexanoic acids, propionate, and γ-butyrolactone. PHA terpolymers and quaterpolymers with different compositions and proportions of monomers were synthesized, and their physicochemical properties were studied. The terpolymers were composed of monomers of 3-hydroxybutyrate (3HB), 3-hydroxyvalerate (3HV), 4-hydroxybutyrate (4HB), or 3-hydroxyhexanoate (3HHx) and had the following compositions: P(3HB/3HB/4HHx) and P(3HB/3HV/4HHx). The quaterpolymers had the following composition: P(3HB/3HV/4HB/3HHx). All copolymer samples, regardless of the composition and proportions of monomers, had lower molecular weights and higher polydispersity values compared to the highly crystalline 3-hydroxybutyrate homopolymer, but retained thermal stability properties, with a difference between the melting point and thermal degradation of at least 100-110 °С. The inclusion of 3HV, 4HB, and 3HHx monomers in the C-chain of 3HB caused changes in the crystalline to amorphous phase ratio and a significant decrease in the degree of crystallinity (Cx), which depended on the type of monomers and their contents in the copolymer. The maximum decrease in Cx (9-17 %) was detected in the P(3HB/3HV/4HB) terpolymer and the P(3HB/3HV/4HB/3HHx) quaterpolymer (30-36 %). The study confirms that there is the possibility of synthesizing polymers with various compositions, including new ones, which differ significantly in their basic properties.

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Держатели документа:
Институт биофизики СО РАН ФИЦ «Красноярский научный центр СО РАН», Российская Федерация, Красноярск
Сибирский федеральный университет, Российская Федерация, Красноярск
Институт физики им. Л.В. Киренского ФИЦ «Красноярский научный центр СО РАН», Российская Федерация, Красноярск

Доп.точки доступа:
Васильев, Александр Дмитриевич; Vasiliev, A. D.; Волова, Т. Г.

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Biosynthesis and properties of a P(3HB-co-3HV-co-4HV) produced by Cupriavidus necator B-10646 / N. O. Zhila, K. Y. Sapozhnikova, E. G. Kiselev [et al.] // Polymers. - 2022. - Vol. 14, Is. 19. - Ст. 4226, DOI 10.3390/polym14194226. - Cited References: 77. - The study was funded by State Assignment of the Ministry of Science and Higher Education of the Russian Federation (project No. 0287-2021-0025) . - ISSN 2073-4360
Кл.слова (ненормированные):
Cupriavidus necator B-10646 -- γ-valerolactone -- biomass concentration -- content and composition of copolymers -- P(3HB-co-3HV-co-4HV) -- physicochemical properties -- films -- surface properties
Аннотация: Synthesis of P(3HB-co-3HV-co-4HV) copolymers by the wild-type strain Cupriavidus necator B-10646 on fructose or sodium butyrate as the main C-substrate with the addition of γ-valerolactone as a precursor of 3HV and 4HV monomers was studied. Bacterial cells were cultivated in the modes that enabled production of a series of copolymers with molar fractions of 3HV (from 7.3 to 23.4 mol.%) and 4HV (from 1.9 to 4.7 mol.%) with bacterial biomass concentration (8.2 ± 0.2 g/L) and PHA content (80 ± 2%). Using HPLC, DTA, DSC, X-Ray, SEM, and AFM, the physicochemical properties of copolymers and films prepared from them have been investigated as dependent on proportions of monomers. Copolymers are characterized by a reduced degree of crystallinity (Cx 38–49%) molecular weight characteristics Mn (45–87 kDa), and Mw (201–248 kDa) compared with P(3HB). The properties of the films surface of various composition including the porosity and surface roughness were studied. Most of the samples showed a decrease in the average pore area and an increase in their number with a total increase in 3HV and 4HV monomers. The results allow scaling up the productive synthesis of P(3HB-co-3HV-co-4HV) copolymers using Cupriavidus necator B-10646.

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Держатели документа:
Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Basic Department of Biotechnology, School of Fundamental Biology and Biotechnology, Siberian Federal University, 79 Svobodnyi Av, Krasnoyarsk, 660041, Russian Federation
L.V. Kirensky Institute of Physics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/38 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”, 50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Zhila, N. O.; Sapozhnikova, K. Y.; Kiselev, E. G.; Nemtsev, I. V.; Немцев, Иван Васильевич; Lukyanenko, A. V.; Лукьяненко, Анна Витальевна; Shishatskaya, E. I.; Volova, T. G.
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Biosynthesis and properties of sulfur-containing polyhydroxyalkanoates (PHAs) produced by wild-type strain Cupriavidus necator B-10646 / N. O. Zhila, K. Yu. Sapozhnikova, A. V. Berezovskaya [et al.] // Polymers. - 2023. - Vol. 15, Is. 4. - Ст. 1005, DOI 10.3390/polym15041005. - Cited References: 53. - The study was funded by State Assignment of the Ministry of Science and Higher Education of the Russian Federation (project No. 0287-2021-0025) . - ISSN 2073-4360
Кл.слова (ненормированные):
biosynthesis -- different precursors -- sulfur-containing PHAs -- chemical composition -- 3MP monomers contents -- properties
Аннотация: The study addresses the growth of the wild-type strain Cupriavidus necator B-10646 and the synthesis of sulfur-containing polyhydroxyalkanoates (PHA) by this strain on media containing fructose and three different precursors (3-mercaptopropionic acid, 3′,3′-dithiodipropionic acid and 3′,3′-thiodipropionic acid). By varying the concentration and number of doses of the precursors added into the bacterial culture, it was possible to find conditions that ensure the formation of 3-mercaptopropionate (3MP) monomers from the precursors and their incorporation into the C-chain of poly(3-hydroxybutyrate). A series of P(3HB-co-3MP) copolymer samples with different content of 3MP monomers (from 2.04 to 39.0 mol.%) were synthesized and the physicochemical properties were studied. The effect of 3MP monomers is manifested in a certain decrease in the molecular weight of the samples and an increase in polydispersity. Temperature changes are manifested in the appearance of two peaks in the melting region with different intervals regardless of the 3MP content. The studied P(3HB-co-3MP) samples, regardless of the content of 3MP monomers, are characterized by equalization of the ratio of the amorphous and crystalline phases and have a close degree of crystallinity with a minimum of 42%, = and a maximum of 54%.

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Держатели документа:
Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/50 Akademgorodok, 660036 Krasnoyarsk, Russia
Basic Department of Biotechnology, School of Fundamental Biology and Biotechnology, Siberian Federal University, 79 Svobodnyi Av., 660041 Krasnoyarsk, Russia
Department of Medical Biology, School of Fundamental Biology and Biotechnology, Siberian Federal University, 79 Svobodnyi Av., 660041 Krasnoyarsk, Russia
L.V. Kirensky Institute of Physics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/38 Akademgorodok, 660036 Krasnoyarsk, Russia
Basic Department of Solid State Physics and Nanotechnology, School of Engineering Physics and Radio Electronics, Siberian Federal University, 26 Kirensky St., 660074 Krasnoyarsk, Russia
International and Interuniversity Centre for Nano Science and Nano Technology, Mahatma Gandhi University, Kottayam 686560, India

Доп.точки доступа:
Zhila, Natalia O.; Sapozhnikova, Kristina Yu.; Berezovskaya, Arina V.; Kiselev, Evgeniy G.; Shishatskaya, Ekaterina I.; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Thomas, Sabu; Volova, Tatiana G.
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