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1.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Lavrova D. G., Zvonarev A. N., Alferov V. A., Khonina T. G., Shadrina E. V., Alferov S. V., Ponamoreva O. N.
Заглавие : Biocompatible silica-polyethylene glycol-based composites for immobilization of microbial cells by sol-gel synthesis
Место публикации : Polymers. - 2023. - Т. 15, № 2. - С. 458
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): ormosil composites--biofilter--biocatalysts
Аннотация: Biocatalysts based on the methylotrophic yeast Ogataea polymorpha VKM Y-2559 immobilized in polymer-based nanocomposites for the treatment of methanol-containing wastewater were developed. The organosilica composites with different matrix-to-filler ratios derived from TEOS/MTES in the presence of PEG (SPEG-composite) and from silicon-polyethylene glycol (STPEG-composite) differ in the structure of the silicate phase and its distribution in the composite matrix. Methods of fluorescent and scanning microscopy first confirmed the formation of an organosilica shell around living yeast cells during sol-gel bio-STPEG-composite synthesis. Biosensors based on the yeast cells immobilized in STPEG- and SPEG-composites are characterized by effective operation: the coefficient of sensitivity is 0.85 ± 0.07 mgO2 × min−1 × mmol−1 and 0.87 ± 0.05 mgO2 × min−1 × mmol−1, and the long-term stability is 10 and 15 days, respectively. The encapsulated microbial cells are protected from UV radiation and the toxic action of heavy metal ions. Biofilters based on the developed biocatalysts are characterized by high effectiveness in the utilization of methanol-rich wastewater—their oxidative power reached 900 gO2/(m3 × cycle), and their purification degree was up to 60%.
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2.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pershina A. G., Demin A. M., Perekucha N. A., Brikunova O. Y., Efimova L. V., Nevskaya K. V., Vakhrushev A. V., Zgoda V. G., Uimin M. A., Minin A. S., Malkeyeva D., Kiseleva E., Zima A. P., Krasnov V. P., Ogorodova L. M.
Заглавие : Peptide ligands on the PEGylated nanoparticle surface and human serum composition are key factors for the interaction between immune cells and nanoparticles
Место публикации : Colloids and Surfaces B: Biointerfaces. - 2023. - Vol. 221. - С. 112981
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The architecture of a nanoparticles' surface formed due to a modification with a ligand and protein corona formation in biofluids is critical for interactions with cells in vivo. Here we studied interactions of immune cells with magnetic nanoparticles (MNPs) covalently modified with polyethylene glycol (PEG) and their counterparts conjugated with peptides: a pH (low) insertion peptide (pHLIP) and cycloRGD as a targeting ligand in human serum. The conjugation of MNPs-PEG with pHLIP, but not with cycloRGD, enhanced the association of these particles with mononuclear phagocytic cells in vitro and in vivo. We did not find a clear difference in protein corona composition between the pHLIP-modified and parental PEGylated nanoparticles. Analysis of the effect of autologous human serum on MNP uptake by monocytes showed that the efficiency of endocytosis varies among healthy donors and depends on intrinsic properties of serum. Nevertheless, using classic blood, coagulation, biochemical tests, and anti-PEG IgG serum level, we failed to identify the cause of the observed interdonor variation. These individual differences should be taken into consideration during testing of nanotherapeutics.
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3.

Вид документа : Статья из журнала
Шифр издания : 54/S 98
Автор(ы) : Filatova E. S., Fedorova O. V., Rusinov G. L., Charushin O. N.
Заглавие : Synthesis and properties of heterocycle-containing podands
Место публикации : Chemistry of Heterocyclic Compounds. - 2021. - Vol. 57, № 10. - С. 971–983
УДК : 54
ББК : Г
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): heterocycle-containing podands--glycol--oligo(oxyethylene) spacer--open-chain analogs of crown ethers
Аннотация: The review is devoted to noncyclic analogs of crown ethers (podands) containing an oxyethylene spacer and heterocyclic fragments at one or both of its ends. The paper considers publications on the methods of obtaining and properties of podands for the 2010–2021 period.
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4.

Вид документа : Статья из журнала
Шифр издания : Г/A 10
Автор(ы) : De A., Majee A., Santra S., Khalymbadzha I. A., Zyryanov G. V.
Заглавие : A practicable synthesis of 2,3-disubstituted 1,4-dioxanes bearing a carbonyl functionality from α,β-unsaturated ketones using the williamson strategy
Место публикации : Organic & biomolecular chemistry. - 2021. - Vol. 19, № 6. - С. 1278-1286
ББК : Г
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: We have observed that a reagent combination of NaIO4 and NH2OH·HCl reacts with α,β-unsaturated ketones followed by the nucleophile ethylene glycol allowing the synthesis of 2,3-disubstituted 1,4-dioxanes using cesium carbonate as a base under Williamson ether synthesis. This reaction is useful for the synthesis of functionalized 1,4-dioxane having a carbonyl functionality. A variety of 2,3-disubstituted 1,4-dioxanes have been synthesized using these reaction conditions. A probable reaction mechanism has also been proposed.
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5.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bhattacherjee D., Zyryanov G. V., Shaifali, Kumar A., Das P.
Заглавие : Polystyrene stabilized iridium nanoparticles catalyzed chemo- and regio-selective semi-hydrogenation of nitroarenes to N-arylhydroxylamines
Место публикации : Molecular catalysis. - 2021. - Vol. 514. - С. 111836
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): supported iridium nanoparticles--n-arylhydroxylamine--semi-hydrogenation
Аннотация: Polystyrene stabilized Iridium (Ir@PS) nanoparticles (NPs) as a heterogeneous catalyst have been developed and characterized by IR, UV–Vis, SEM, TEM, EDX and XRD studies. The prepared Ir@PS catalyst showed excellent reactivity for chemo- and regio-selective controlled-hydrogenation of functionalized nitroarenes to corresponding N-arylhydroxylamine using hydrazine hydrate as reducing source and environmentally benign polyethylene glycol (PEG-400) as green solvent. The present methodology was applied for vast substrate scope and found to be compatible with wide range of reducible functional groups. The reaction performed at 85 °C or ambient temperature and completed within 5–80 minutes. The catalyst can easily be filtered out from reaction mixture and reusable.
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6.

Вид документа : Статья из журнала
Шифр издания : 54/C 91
Автор(ы) : Khamidullina L. A., Obydennov K. L., Slepukhin P. A., Puzyrev I. S.
Заглавие : Crystal structure, spectral and thermal properties of 1,2-bis[2-(4,4,4-trifluoro-1-hydroxy-3-oxobut-1-enyl)phenoxy]-ethane and luminescent properties of its complexes with Al(III) and Eu(III) [Электронный ресурс]
Место публикации : Journal of Molecular Structure. - 2016. - Vol. 1125. - С. 550-557
Систем. требования: http://apps.webofknowledge.com/full
Примечания : 01.11.16
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): lanthanide complexes --enol-tautomerism--beta-diketones
Аннотация: Describing the crystal structure, packing, FT-IR, UV-Vis and NMR spectra and thermal properties of new polydentate O-ligand based on aryl-beta-diketone moieties connected by ethylene glycol spacer is the subject of this article. The results of IR, UV-Vis and H-1 NMR spectroscopy as well X-ray crystallography of 1,2-bis[2-(4,4,4-trifluoro-1-hydroxy-3-oxobut-1-enyl)phenoxy]-ethane (BTFPE) indicate that the compound exists in solution and in solid as enol. The crystal structure analysis shows that BTFPE has C2/c group of the monoclinic system. Typical S(6) intramolecular hydrogen bond occurs in each 1,3-diketo moiety. This bond is asymmetric and the H atom is closest to the 0 atom adjacent to the phenyl ring. The packing of the crystal is sustained by numerous C-H center dot center dot center dot O, O-H center dot center dot center dot F, C-H center dot center dot center dot F interactions. In the crystal, supramolecular zig-zag chains are formed along the c-axis. Short contacts interconnect the molecules into a two-dimensional layered structure wherein each molecule is node between chains. According to the thermal investigation this compound is stable up to 200 degrees C in air atmosphere, above this temperature it decomposes. Photoluminescent properties of aluminum(III) and europium(III) complexes of BTFPE were evaluated in chloroform solution and in the solid state. Aluminum complex of BTFPE shows blue luminescence with maximum at 445 nm. Europium complex exhibits intense red color luminescence at 613 nm from central Eu(III) ion through the excitation of the ligand.
\\\\expert2\\NBO\\Journal of Molecular Structure\\2016, v.1125, p.550-557.pdf
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7.

Вид документа : Статья из журнала
Шифр издания : 54/N 52
Автор(ы) : Pestov A. V., Khamidullina L. A., Sosnovskikh V. Ya., Slepukhin P. A., Puzyrev I.
Заглавие : New examples of chelating triketone-like ligands that promote formation of binuclear complexes [Электронный ресурс]
Место публикации : Polyhedron. - 2016. - Vol. 106. - С. 75-83
Систем. требования: http://apps.webofknowledge.com/full
Примечания : 03.11.16
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): chroman-4-ones --triketone-like ligands--binuclear complexes
Аннотация: The present work is to investigate of binding properties of chelating triketone-like ligands, which are able to forming of binuclear complexes. The studied compounds are able to exist in cyclic or 'close form' (phenyl substituted or unsubstituted 2-hydroxy-2-(trifluoromethyl)chroman-4-ones) as well as in their associated 'open form' (phenyl substituted or unsubstituted 1,1,1-trifluoro-4-(2-hydroxyphenyl)butan-2,4-diones). In this paper there is good evidence for the compounds are being in solid in 'close form' (pre-ligands), whereas in basic solutions and when involved in metal ion coordination sphere they are being in 'open form' (ligands). Protolytic equilibria of the compounds in aqueous ethylene glycol solutions were studied. Schemes of acid-base equilibria of these compounds were proposed. Apparent ionization constants of compounds containing electron-donor and electron-acceptor substituents in the benzene ring were determined using spectrophotometric method. The binding properties of 1,1, 1-trifluoro-4-(2-hydroxyphenyl)butan-2,4-dione towards Cu(II), Ni(II) and Co(II) were studied. The formation of 2:2 metal-ligand complexes was observed. X-ray analysis gives evidence the formation of complexes in which the ratio metal to ligand can be 1:2 and 2:2. Similar to beta-triketones the studied ligands tends to formation of binuclear complexes with transition metal ions
\\\\expert2\\NBO\\Polyhedron\\2016, v.106, p.75-83.pdf
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8.

Вид документа : Статья из журнала
Шифр издания : 54/F 33
Автор(ы) : Khonina T. G., Safronov A. P., Ivanenko M.V., Shadrina E. V., Chupakhin O. N.
Заглавие : Features of silicon- and titanium-polyethylene glycol precursors in sol-gel synthesis of new hydrogels [Электронный ресурс]
Место публикации : Journal of Materials Chemistry B. - 2015. - Vol. 3, № 27. - С. 5490-5500
Систем. требования: http://apps.webofknowledge.com/
Примечания : Bibliogr. : p. 5499-5500 (38 ref.). - 20.01.2016
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): modified silanes --mineralization--monoliths
Аннотация: The formation of organic/inorganic hydrogels based on silicon and titanium polyethylene glycolates, new biocompatible water-soluble precursors in sol-gel processing, was investigated. The influence of different factors on the gelation process, such as excess of PEG, water molar content, pH of medium, electrolyte additives, was investigated in comparison with silicon-and titanium-glycerol precursors. The specific features of gelation for each type of precursor were revealed. It has been determined that titanium polyethylene glycolates synthesized and used in the excess of PEG formed transparent polymeric hydrogels resistant to syneresis under certain conditions. The titanium polyethylene glycolates synthesized without excess of PEG formed turbid heterogeneous colloidal gels. In the case of silicon polyethylene glycolates the hydrogels obtained were polymeric. Dynamic light scattering was used to confirm the polymeric or colloidal type of gelation. The solid and liquid phases of polymeric silicon- and titanium-polyethylene glycol hydrogels were separated by exhaustive extraction. The solid phase was characterized by combined thermal analysis with simultaneous quadruple mass spectrometry, XRD, IR spectroscopy, and liquid phase-atomic emission spectroscopy. The structural features of polymeric gels were investigated by SEM and TEM methods. The cross-linking density of polymeric hydrogels was evaluated using Flory-Rehner theory based on the mechanical properties of swollen networks of flexible polymeric chains
\\\\expert2\\nbo\\Journal of Materials Chemistry B\\2015. V. 3, N 27. P. 5490-5500.pdf
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9.

Вид документа : Статья из журнала
Шифр издания : 54/K 96
Автор(ы) : Kuznetsov V. A., Pervova M. G., Pestov A. V.
Заглавие : Development of complex approach to the synthesis of trimethylene carbonate as a monomer for biodegradable polymers [Электронный ресурс]
Место публикации : Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2014. - Vol.50, №5. - С. 654-658
Систем. требования: http://download.springer.com/static/pdf/977/art%253A10.1134%252FS1070428014050066.pdf?auth66=1408082936_7206b50e5ccbe87f8e367471f28e39c8&ext=.pdf
Примечания : Bibliogr. : p. 658 (30 ref.). - 13.08.2014
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): polymers --trimethylene carbonate--dialkyl carbonates
Аннотация: With the aim of production of polymers for medicine a new preparation method was developed for trimethylene carbonate based on transesterification with trimethylene glycol of dialkyl carbonates obtained without the use of phosgene. As initial reagents alkylene carbonates or polycarbonates and titanium alkoxides can be utilized. The advantages of this approach consist in obtaining some additional useful substances and the possibility of reprocessing polycarbonate wastes
\\\\expert2\\nbo\\Russian Journal of Organic Chemistry\\2014, 50, (5), 654-658.pdf
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10.

Вид документа : Статья из журнала
Шифр издания : 54/B 12
Автор(ы) : Egorova D. O., Gorbunova T. I., Pervova M. G., Demakov V. A.
Заглавие : Bacterial degradation of a mixture obtained through the chemical modification of polychlorinated biphenyls by polyethylene glycols [Электронный ресурс]
Место публикации : Applied Biochemistry and Microbiology. - 2014. - Vol. 50, № 7. - С. 722-729
Систем. требования: http://download-v2.springer.com/static/pdf/131/art%253A10.1134%252FS0003683814070023.pdf?token2=exp=1428652880~acl=%2Fstatic%2Fpdf%2F131%2Fart%25253A10.1134%25252FS0003683814070023.pdf*~hmac=3182eca3e5ccea6ab1f49dd6b89a557b80a88fa01d0e203f57bcd3fed34fc4d2
Примечания : Bibliogr. : p. 729 (29 ref.). - 10.04.15
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): bacterial degradation--chemical modification--polyethylene glycols
Аннотация: Polychlorinated biphenyls (PCBs), also known by the trade name Sovol, are toxic industrial wastes. They have been subjected to chemical treatment by polyethylene glycols (PEGs) and potassium hydroxide. As a result of the interaction of the Sovol with various molecular mass PEGs (MMPEG-4 ∼ 200, MMPEG-22 ∼ 1000), water-soluble mixtures M1 and M2 containing mono(polyethylene glycol)oxy-derivatives (PCB-PEG-4 and PCB-PEG-22), polychlorobiphenylols, and unreacted PCB congeners (PCB 44, PCB 47, PCB 49, PCB 52, and PCB 66) were obtained. It was shown for the first time that mixtures M1 and M2 are susceptible to bacterial degradation without their fractionation. According to the gas-liquid chromatography with flame-ionization and mass-spectrometric detection, the Rhodococcus wratislaviensis KT112-7 strain degraded all of the chemical compounds occurring in the mixtures. In a 5-day experiment, it was found that the KT112-7 strain decomposes mono(polyethylene glycol)oxy-derivatives completely (by 100%) and polychlorobiphenylols and PCB congeners by 90–95% in the M1 and M2 mixtures. The culture medium did not contain transformation products, whereas free chlorine ions were accumulated (72–94% of the maximum possible amount). Thus, the use of the chemical modification and consecutive bacterial degradation provided an effective destruction of technical PCB mixtures with a high content of highly chlorinated congeners
\\\\expert2\\nbo\\Applied Biochemistry and Microbiology\\2014, v.50, N 7, p.722-729.pdf
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