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Каталог книг и продолжающихся изданий библиотеки Института биофизики СО РАН
Иностранные журналы библиотеки Института биофизики СО РАН
Отечественные журналы библиотеки Института биофизики СО РАН
Каталог диссертаций ИБФ СО РАН
Труды сотрудников ИБФ СО РАН
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 Найдено в других БД:Каталог книг и продолжающихся изданий библиотеки Института биофизики СО РАН (2)
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Общее количество найденных документов : 6
Показаны документы с 1 по 6
1.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Stolyar S. V., Krasitskaya V. V., Frank L. A., Yaroslavtsev R. N., Chekanova L. A., Gerasimova Y. V., Volochaev M. N., Bairmani M. S., Velikanov D. A.
Заглавие : Polysaccharide-coated iron oxide nanoparticles: Synthesis, properties, surface modification
Место публикации : Mater Lett: Elsevier B.V., 2021. - Vol. 284. - Ст.128920. - ISSN 0167577X (ISSN), DOI 10.1016/j.matlet.2020.128920
Аннотация: In this work, magnetite nanoparticles coated with polysaccharides were synthesized. Arabinogalactan and chitosan were used as polysaccharides. The possibilities of immobilization of biospecific molecules on the surface of the obtained composites were studied. Experiments on covalent immobilization of biospecific molecules on magnetic nanoparticles coated with a polysaccharide showed a high density of immobilized molecules. This suggests the use of such materials in bioanalytical systems or as affinity sorbents. © 2020 Elsevier B.V.
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2.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Stolyar S. V., Krasitskaya V. V., Frank L. A., Yaroslavtsev R. N., Chekanova L. A., Gerasimova Y. V., Volochaev M. N., Bairmani, M. Sh., Velikanov D. A.
Заглавие : Polysaccharide-coated iron oxide nanoparticles: Synthesis, properties, surface modification
Колич.характеристики :4 с
Коллективы : Russian Foundation for Fundamental ResearchRussian Foundation for Basic Research (RFBR); Government of the Krasnoyarsk Territory; Krasnoyarsk Territory Fund [18-43-243003]; Council of the President of the Russian Federation for State Support of Young Scientists and Leading Scientific SchoolsLeading Scientific Schools Program [MK-1263.2020.3]
Место публикации : Mater. Lett.: ELSEVIER, 2021. - Vol. 284. - Ст.128920. - ISSN 0167-577X, DOI 10.1016/j.matlet.2020.128920. - ISSN 1873-4979(eISSN)
Примечания : Cited References:12. - The reported study was carried out with the financial support of the Russian Foundation for Fundamental Research, the Government of the Krasnoyarsk Territory, the Krasnoyarsk Territory Fund for Support of Scientific and Technical Activity in the framework of scientific Project No. 18-43-243003. This work was supported by the Council of the President of the Russian Federation for State Support of Young Scientists and Leading Scientific Schools (project no. MK-1263.2020.3).
Аннотация: In this work, magnetite nanoparticles coated with polysaccharides were synthesized. Arabinogalactan and chitosan were used as polysaccharides. The possibilities of immobilization of biospecific molecules on the surface of the obtained composites were studied. Experiments on covalent immobilization of biospecific molecules on magnetic nanoparticles coated with a polysaccharide showed a high density of immobilized molecules. This suggests the use of such materials in bioanalytical systems or as affinity sorbents. (c) 2020 Elsevier B.V. All rights reserved.
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3.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Rogozin D. Y., Balaev D. A., Semenov S. V., Shaikhutdinov K. A., Bayukov O. A.
Заглавие : Magnetic properties of bottom sediments from Meromectic Shira Lake (Siberia, Russia)
Место публикации : Dokl. Earth Sci.: Maik Nauka-Interperiodica Publishing, 2016. - Vol. 469, Is. 2. - С. 819-823. - ISSN 1028334X (ISSN) , DOI 10.1134/S1028334X16080067
Ключевые слова (''Своб.индексиров.''): magnetic properties--magnetite--sediments--biogenic magnetite--bottom sediments--geochemical characteristic--local minimums--magnetite particles--magnetotactic bacteria--single domains--ssbauer spectroscopies--lakes
Аннотация: Magnetic properties were studied in bottom sediments of saline meromictic Shira Lake by the methods of static magnetometry and resonance Mossbauer spectroscopy for the first time. All layers of bottom sediments contain nanosized single-domain magnetite particles produced by magnetotactic bacteria. The concentration of magnetite in bottom sediments decreased with depth, reaching a local minimum in the layer corresponding to the minimal level of the lake observed in 1910–1930. It is demonstrated that biogenic magnetite may indicate climate-related changes in the level of Shira Lake, in addition to the other biological and geochemical characteristics. © 2016, Pleiades Publishing, Ltd.
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4.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bondarenko, Lyubov S., Kovel, Ekaterina S., Kydralieva, Kamila A., Dzhardimalieva, Gulzhian, I, Illes, Erzsebet, Tombacz, Etelka, Kicheeva, Arina G., Kudryasheva, Nadezhda S.
Заглавие : Effects of Modified Magnetite Nanoparticles on Bacterial Cells and Enzyme Reactions
Колич.характеристики :20 с
Коллективы : Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-315-50048, 19-33-90149, 18-29-19003]
Место публикации : Nanomaterials: MDPI, 2020. - Vol. 10, Is. 8. - Ст.1499. - ISSN 2079-4991(eISSN), DOI 10.3390/nano10081499
Примечания : Cited References:83. - This research was funded by the Russian Foundation for Basic Research (#19-315-50048, #19-33-90149, and #18-29-19003).
Предметные рубрики: NATURAL ORGANIC-MATTER
HUMIC-ACID
DETOXIFICATION PROCESSES
Аннотация: Current paper presents biological effects of magnetite nanoparticles (MNPs). Relations of MNP' characteristics (zeta-potential and hydrodynamic diameters) with effects on bacteria and their enzymatic reactions were the main focus.Photobacterium phosphoreumand bacterial enzymatic reactions were chosen as bioassays. Three types of MNPs were under study: bare Fe3O4, Fe(3)O(4)modified with 3-aminopropyltriethoxysilane (Fe3O4/APTES), and humic acids (Fe3O4/HA). Effects of the MNPs were studied at a low concentration range ( 2 mg/L) and attributed to availability and oxidative activity of Fe3+, high negative surface charge, and low hydrodynamic diameter of Fe3O4/HA, as well as higher Fe(3+)content in suspensions of Fe3O4/HA. Low-concentration suspensions of bare Fe(3)O(4)provided inhibitory effects in both bacterial and enzymatic bioassays, whereas the MNPs with modified surface (Fe3O4/APTES and Fe3O4/HA) did not affect the enzymatic activity. Under oxidative stress (i.e., in the solutions of model oxidizer, 1,4-benzoquinone), MNPs did not reveal antioxidant activity, moreover, Fe3O4/HA demonstrated additional inhibitory activity. The study contributes to the deeper understanding of a role of humic substances and silica in biogeochemical cycling of iron. Bioluminescence assays, cellular and enzymatic, can serve as convenient tools to evaluate bioavailability of Fe(3+)in natural dispersions of iron-containing nanoparticles, e.g., magnetite, ferrihydrite, etc.
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5.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bondarenko L. S., Kovel E. S., Kydralieva K. A., Dzhardimalieva G. I., Illes E., Tombacz E., Kicheeva A. G., Kudryasheva N. S.
Заглавие : Effects of modified magnetite nanoparticles on bacterial cells and enzyme reactions
Место публикации : Nanomaterials: MDPI AG, 2020. - Vol. 10, Is. 8. - Ст.1499. - С. 1-20. - ISSN 20794991 (ISSN), DOI 10.3390/nano10081499
Аннотация: Current paper presents biological effects of magnetite nanoparticles (MNPs). Analyzing effects of MNP’ characteristics (zeta-potential and hydrodynamic diameters) on bacteria and their enzyme reactions was the main focus. Photobacterium phosphoreum and bacterial enzymatic reactions were chosen as bioassays. Three types of MNPs were under study: bare Fe3O4, Fe3O4 modified with 3-aminopropyltriethoxysilane (Fe3O4/APTES), and humic acids (Fe3O4/HA). Effects of the MNPs were studied at a low concentration range (< 2 mg/L) and attributed to availability and oxidative activity of Fe3+, high negative surface charge, and low hydrodynamic diameter of Fe3O4/HA, as well as higher Fe3+ content in suspensions of Fe3O4/HA. Low-concentration suspensions of bare Fe3O4 provided inhibitory effects in both bacterial and enzymatic bioassays, whereas the MNPs with modified surface (Fe3O4/APTES and Fe3O4/HA) did not affect the enzymatic activity. Under oxidative stress (i.e., in the solutions of model oxidizer, 1,4-benzoquinone), MNPs did not reveal antioxidant activity, moreover, Fe3O4/HA demonstrated additional inhibitory activity. The study contributes to the deeper understanding of a role of humic substances and silica in biogeochemical cycling of iron. Bioluminescence assays, cellular and enzymatic, can serve as convenient tools to evaluate bioavailability of Fe3+ in natural dispersions of iron-containing nanoparticles, e.g., magnetite, ferrihydrite, etc. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
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6.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Semenov S. V., Balaev D. A., Shaykhutdinov K. A., Rogozin D. Y.
Заглавие : Day plots of bacterial magnetite from sediments of shira lake (Khakassia, Russia)
Место публикации : J. Sib. Fed. Univ. Math. Phys.: Siberian Federal University, 2017. - Vol. 10, Is. 2. - С. 252-256. - ISSN 19971397 (ISSN) , DOI 10.17516/1997-1397-2017-10-2-252-256
Ключевые слова (''Своб.индексиров.''): bacterial magnetite--magnetic hysteresis--nanoparticles
Аннотация: The domain state of magnetite detected in sediments of Shira lake (Khakassia, Russia) was examined by means of magnetic hysteresis. Analysis of experimental data obtained on samples from different parts of bottom sediment cores in terms of Day plots allowed us to conclude that magnetite particles are in the pseudo-single-domain state. This indicates respectively small size of magnetite particles ( 100 nm) and reveals their bacterial origin. Biogenic magnetite buried in the bottom sediments can indicate the climatic changes in the Shira lake level in the Late Holocene. © Siberian Federal University. All rights reserved.
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