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41.
42.
V. I. Arkhipova E. A. Stolboushkina O. S. Nikonov A. G. Gabdulkhakov M. B. Garber 《Crystallography Reports》2014,59(1):71-74
Archaeal translation initiation factor 2 (aIF2) is homologous to its eukaryotic counterpart (eIF2). It is a heterotrimeric protein consisting of α, β, and γ subunits. The protein e/aIF2 forms a ternary complex with guanosine 5′-triphosphate and the initiator methionyl-tRNA (Met-tRNAi) and delivers the latter to the ribosome. In archaea, translation initiation factor 2 has an additional function. The γ subunit of aIF2 binds mRNAs with a triphosphate at the 5′-end and prevents 5′-to-3′ directional mRNA decay. To determine the mRNA-binding site on the surface of aIF2γ, mutations were introduced into the protein sequence at sites of possible interactions with mRNA. The crystals of the mutant forms of aIF2γ were obtained, and X-ray diffraction data sets suitable for structure determination at atomic resolution were collected. 相似文献
43.
Arkhipova Ekaterina A. Strokova Natalia E. Tambovtseva Yulia A. Ivanov Anton S. Chernyak Sergei A. Maslakov Konstantin I. Egorova Tolganay B. Savilov Serguei V. Lunin Valery V. 《Journal of Thermal Analysis and Calorimetry》2020,140(6):2641-2648
Journal of Thermal Analysis and Calorimetry - Combustion heats of graphene nanoflakes (GNFs) of different thicknesses produced by chemical vapor deposition method were measured for the first time... 相似文献
44.
A. A. Arkhipova 《Journal of Mathematical Sciences》1994,72(6):3370-3378
We obtain an increase in the exponent of integrability of the derivatives of solutions of two classes of boundary-value problems. We derive estimates of the corresponding norms of the solutions. For a class of quasilinear elliptic systems we establish an Lp-estimate of the gradient of the solutions of class W
m
1
,m > 1, p > m, of a boundary-value problem with nonzero condition on the conormal derivative. To solve Signorini's problem we obtain an Lp-estimate, p > 2,of the second derivatives of an L
2-solution with a nonzero one-sided restriction on the conormal derivative. The proof of both results is based on the application of an reverse Hölder inequality with a surface integral established earlier by the author. Bibliography: 5 titles.Translated fromProblemy Matematicheskogo Analiza, No. 12, 1992, pp. 13–29. 相似文献
45.
A. A. Arkhipova 《Journal of Mathematical Sciences》1996,80(6):2208-2225
The partial regularity up to the boundary of a domain is established for a solution u ∈ H1 (Ω) ∩ L∞ (Ω) to the boundary-value problem for a second-order elliptic system with strong nonlinearity in the case of dimension n≥3.
Bibliography: 12 titles.
Translated fromProblemy Matematicheskogo Analiza, No. 15, 1995, pp. 47–69. 相似文献
46.
47.
S. V. Savilov A. S. Ivanov A. V. Egorov M. N. Kirikova E. A. Arkhipova V. V. Lunin 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2016,90(2):429-435
The oxidation of multi-walled carbon nanotubes (MCNTs), nanofibers (CNFs), and few-layer graphite fragments (FLGFs) with a nitric acid solution was studied. The oxygen content in the functionalized derivatives was determined by X-ray photoelectron spectroscopy and thermal analysis. The results were correlated with the structural features of the nanomaterials revealed by high-resolution transmission electron microscopy and X-ray diffraction. The highest content of carboxyl groups was achieved by functionalization of carbon nanotubes with the conical position of graphene layers. 相似文献
48.
Gnahm M Berger C Arkhipova M Kunkel H Pajkossy T Maas G Kolb DM 《Physical chemistry chemical physics : PCCP》2012,14(30):10647-10652
Five hexaalkylguanidinium-based ionic liquids have been synthesised, and based on their cyclic voltammograms the most suited one, N,N-dibutyl-N',N'-diethyl-N',N'-dimethylguanidinium bis(trifluoromethylsulfonyl)imide, has been chosen for electrochemical studies. The surface interaction of this room-temperature ionic liquid with single crystalline gold surfaces (Au(100) and Au(111)) has been investigated using cyclic voltammetry, impedance spectroscopy and in situ scanning tunnelling microscopy (STM). The interfacial capacitance was found to be very low; STM measurements revealed the hex-reconstruction and herringbone reconstruction for Au(100) and for Au(111), respectively, at negative potentials; that is, at these potentials no hints for ad-structures of the cation could be found. 相似文献
49.
B. M. Bolotin Ya. A. Mikhlina S. A. Arkhipova L. G. Kuz’mina 《Crystallography Reports》2012,57(2):246-251
The crystal and molecular structures of two crystal forms (pale yellow form 1 and yellow form 2) of N-[2-(4-oxo-4H-benzo[d][1,3]oxazin-2-yl)phenyl]naphthalene-2-sulfonamide (Orlyum White 520T), which is an organic luminophore with an anomalously
high Stokes shift, were determined. Crystal 2 is a solvate with para-xylene. Crystal 1 is a solvent-free form. The molecular geometry in crystal 1 differs from that in 2 only in the orientation of the SO2
Ar substituent. The bond-length distribution in the planar moiety of the molecule in crystal 1 is virtually identical to that in 2, but the bonds in the NH-SO2
Ar-bearing benzene ring in crystal 1 are systematically longer than the corresponding bonds in crystal 2. This fact can be attributed to the crystal-packing effects. In 2 the molecules form stacked dimers with π-stacking interactions between two planar conjugated tricyclic systems. The charge
transfer in this system accounts for the intensification of the color of these crystals and the observed difference in the
optical properties of 1 and 2. 相似文献