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Общее количество найденных документов : 58
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1.
Инвентарный номер: нет.
   
   A 53


   
    An enzyme-free electrochemical method for the determination of E-coli using Fe3O4 nanocomposites with a SiO2 shell modified by ferrocene [Electronic resource] / A. Kozitsina, N. N. Malysheva, I. A. Utepova, Yu. A. Glazyrina, A. I. Matern, Kh. Brainina, O. N. Chupakhin // Journal of Analytical Chemistry. - 2015. - Vol. 70, № 5. - С. 540-545. - Bibliogr. : p. 545 (37 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
CYCLIC VOLTAMMETRY -- ELECTROACTIVE NANOCOMPOSITE PARTICLES -- IMMUNOASSAY
Аннотация: An electrochemical immunoassay method is developed for determining the strain of Escherichia coli ATCC 25922 with the use of electroactive nanocomposite particles based on magnetite Fe3O4 coated by SiO2 modified with ferrocene as a signal label. A sensitive, direct, and easily measured analytical response is obtained by cyclic voltammetry. The developed method enables the determination of bacterial cells at a minimum concentration of 2.3 x 10(3) CFU/mL. The analytical range is 2.3 x 10(3)-2.3 x 10(7) CFU/mL; the detection limit is 2.5 x 10(2) CFU/mL. The required sample volume is 0.5 mL, and the analysis time is 40 min.

\\\\expert2\\nbo\\Journal of Analytical Chemistry\\2015, V. 70, N 5, p.540-545.pdf
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2.
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    Bioactive silicon-iron-containing glycerohydrogel synthesized by the sol-gel method in the presence of chitosan / T. G. Khonina, D. S. Tishin, L. P. Larionov [et al.] // Russian chemical bulletin. - 2022. - Vol. 71, № 11. - P2342-2351
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: A novel biologically active nanocomposite glycerohydrogel based on two biocompatible precursors, silicon and iron glycerolates, was synthesized by the sol—gel method in the presence of chitosan (Ch). The composition and structural features of the gel were characterized by advanced analytical methods including transmission electron microscopy, X-ray diffraction, and atomic emission spectroscopy. It was shown that iron(iii) monoglycerolate undergoes partial hydrolysis under the gelation conditions and exists as a separate nanoscale phase along with the hydrolysis products in cells of the 3D Si-containing polymeric gel network. This network is formed as a result of incomplete hydrolysis of silicon glycerolates in excess glycerol followed by homo- and heterofunctional condensation of silanol groups with the formation of Si-O-Si units containing residual glyceroxy groups at the silicon atom. Chitosan forms numerous intermolecular bonds with the 3D gel network, accelerates the process of gelation, makes the gel morphostructure more ordered, and increases the stability of the gel. The Si-Fe-Ch-containing glycerohydrogel is nontoxic and possesses hemostatic and wound-healing activity, being a promising topical medication for medical and veterinary practice.

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3.
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   D 38


    Demin, A. M.
    Covalent surface modification of Fe3O4 magnetic nanoparticles with alkoxy silanes and amino acids [Электронный ресурс] / A. M. Demin, V. P. Krasnov, V. N. Charushin // Mendeleev Communications. - 2013. - Vol.23, №1. - P14-16
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
Fe3O4 -- MAGNETIC NANOPARTICLES -- ALKOXY SILANES
Аннотация: (3-Aminopropyl)silane-modified magnetic nanoparticles containing ε-aminocaproic acid and l-lysine fragments with free functional groups were obtained by the surface modification of Fe3O4 with alkoxysilane derivatives

\\\\Expert2\\NBO\\Mendeleev Communications\\2013, v.23, p. 14.pdf
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4.
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    Design of SiO2/aminopropylsilane-modifi ed magnetic Fe3O4 nanoparticles for doxorubicin immobilization / A. M. Demin, A. V. Vakhrushev, M. S. Valova [et al.] // Russian chemical bulletin. - 2021. - Vol. 70, № 5. - P987-994
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
MAGNETIC NANOPARTICLES -- N-PHOSPHONOMETHYLIMINODIACETIC ACID -- DOXORUBICIN -- SiO2 COATING -- SORPTION
Аннотация: Surface modifi cation of magnetic nanoparticles (MNPs) with tetramethylorthosilicate and 3-aminopropyltrimethoxysilane was studied. The use of N-phosphonomethyliminodiacetic acid for the stabilization of the initial MNPs can signifi cantly increase the coating thickness and specifi c surface area of SiO2/APS-modifi ed (APS is 3-aminopropylsilane) MNPs. The possibility of sorption of antitumor drug doxorubicin (DOX) on the synthesized nanoparticles was studied. The degree of sorption of DOX increases with an increase in the specifi c surface area of the particles.

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5.
Инвентарный номер: нет.
   
   D 55


   
    Diesters on the basis of 16-hydroxyisosteviol and dicarboxylic acids as carriers of Fe(III) picrates [Electronic resource] / V. E. Kataev, O. I. Militsina, I. Yu. Strobykina, A. T. Gubaidullin, V. V. Zverev, O. N. Kataeva, O. V. Fedorova, M. S. Valova, G. L. Rusinov // Journal of Inclusion Phenomena and Macrocyclic Chemistry. - 2008. - Vol. 60, № 1-2. - P51-58. - Библиогр. : с. 58 (32 назв.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Diesters on the basis of 16-hydroxyisosteviol and dicarboxylic acids, exhibiting anti-tubercular activity, transport Fe(III) through liquid chloroform membrane which models a cell membrane. It is revealed that fluxes and anti-tubercular activity increase, as the length of the chain (spacer) between two ent-beyran skeletons of diesters increases. Computations on the level DFT/PBE explain the dependence of complexes stability on a structure of diterpenoid ligands. The structures of three diesters were established by single crystal X-ray analysis. ??

\\\\Expert2\\nbo\\Journal of Inclusion Phenomena and Macrocyclic Chemistry\\2008, V.60, N1-2, 51.pdf
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6.
Инвентарный номер: нет.
   
   F 97


   
    Functionalization of Fe3O4 magnetic nanoparticles with RGD peptide derivatives [Electronic resource] / A. M. Demin, A. Yu. Vigorov, I. A. Nizova, M. A. Uimin, N. N. Shchegoleva, A. E. Ermakov, V. P. Krasnov, V. N. Charushin // Mendeleev Communications. - 2014. - Vol.24, №1. - С. 20-22. - Bibliogr. : p. 22 (16 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
RGD PEPTIDE -- GLUTARIC ACID MOIETY -- MAGNETIC NANOPARTICLES
Аннотация: Derivatives of RGD peptide, such as Nω-Pbf-l-Arg-Gly-l- Asp(OAlk)2 (Alk = Me or But), which contain glutaric acid moiety as a linker, were synthesized and immobilized to Fe3O 4 magnetic nanoparticles obtained by gas condensation method

\\\\expert2\\nbo\\Mendeleev Communications\\2014, v.24, p. 20.pdf
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7.
Инвентарный номер: нет.
   
   I-55


   
    Immobilization of pmida on Fe3O4 magnetic nanoparticles surface: mechanism of bonding / A. M. Demin, A. V. Mekhaev, V. P. Krasnov, A. A. Esin, D. K. Kuznetsov, P. S. Zelenovskiy, Y. Y. Shur // Applied surface science. - 2018. - V 440. - С. 1196-1203
ББК 24
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
FTIR -- MAGNETIC NANOPARTICLES -- MECHANISM OF IMMOBILIZATION -- PMIDA -- TGA -- XPS
Аннотация: The mechanism of N-phosphonomethyl iminodiacetic acid (PMIDA) binding with the Fe3O4 magnetic nanoparticle (MNPs) surface by Fourier transformed infrared spectroscopy, X-ray photoelectron spectroscopy and thermogravimetry was comprehensive studied. To study of microstructure, size and core structure of synthesized nanoparticles the scanning electron microscopy, X-ray diffraction analysis and Raman spectroscopy were carried out. A new scheme for the tridentate bonding of the phosphonomethyl derivative with surface Fe atoms involving unequal P–O–Fe bonds was proposed. The mechanism of thermal decomposition of PMIDA molecules on the MNP surface was studied using a thermogravimetric analyzer combined with infrared spectrometer. It was shown for the first time that during the thermal treatment of phosphonomethyl-modified MNPs, PMIDA molecules are not desorbed from the surface of MNPs but gradually decompose. We believe that obtained in this work data will be useful for a deeper understanding of the mechanisms of phosphonic acid derivatives interaction with MNPs, as well as in the design of new biomedical materials, in which the conjugation of biomolecules with carboxyl groups of PMIDA-modified MNPs is assumed.

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8.
Инвентарный номер: нет.
   


   
    Individual iron(III) glycerolate: synthesis and characterisation / T. G. Khonina, E. Y. Nikitina, D. S. Tishin [et al.] // RSC Advances. - 2022. - Vol. 12, № 7. - P4042-4046
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Iron(II) and iron(III) salts of strong acids form iron glycerolates on heating at 180 °C with glycerol in the presence of an equivalent amount of alkali. Individual iron(III) glycerolate was obtained for the first time. When Fe3O4 magnetic nanoparticles were heated with glycerol, an iron(III) glycerolate shell was formed on their surface.

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9.
Инвентарный номер: нет.
   
   I-60


   
    Influence of the structure of the aminoalkyl group in polysiloxane on the selectivity of its interaction with metal ions / A. S. Kholmogorova, E. A. Fedoseeva, L. K. Neudachina [et al.] // Russian Journal of Applied Chemistry. - 2021. - Vol. 94, № 4. - P478-485
ББК Г
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Polysiloxanes containing nonchelating 3-aminopropyl and chelating N-(2-aminoethyl)-3-aminopropyl groups with the degree of functionalization of 28 and 24%, respectively, were prepared by sol–gel synthesis. The polysiloxanes obtained showed comparable activity in sorption of Pd(II), Pt(IV), Fe(III), Cd(II), Zn(II), Co(II), Ni(II), Cu(II), Mn(II), Pb(II), Ca(II), and Mg(II) ions from model multicomponent solutions. At pH 3,3-aminopropylpolysiloxane selectively takes up platinoid ions. The chelating structure of N-(2-aminoethyl)-3-aminopropyl groups leads to a decrease in the selectivity of the interaction with Pd(II) ions but increases the affinity for Fe(III), Ni(II), and Cu(II). Preconcentration in the dynamic mode allows quantitative sorption of Pd(II) and Pt(IV), followed by virtually quantitative elution of the metal ions from the sorbent surface.

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10.
Инвентарный номер: нет.
   
   M 17


   
    Magnetic properties of single-molecule magnets [Me-2(II)Fe-2(III)(L)-4(OH)-2(EtOH)-2 (Et-2OH)-2] Me = Co, NI with dicubane structure / D. L. Chizhov, P. A. Slepukhin, D. S. Yachevskii, V. N. Charushin // The 14-th International Conference of Molecule-based Magnets : absr. book, Saint Petersburg, Russia, July 5-10 2014. - СПб., 2014. - P-676. - С. 177. - Bibliogr. : p. 177 (1 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
MAGNETIC PROPERTIES -- DICUBANE STRUCTURE

\\\\expert2\\NBO\\The 14-th International Conference of Molecule-based Magnets\\The 14-th International Conference of Molecule-based Magnets.pdf
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