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1.
Palamarchuk I. V. Shulgau Z. T. Sergazy Sh. D. Zhulikeeva A. M. Seilkhanov T. M. Kulakov I. V. 《Russian Journal of General Chemistry》2022,92(9):1692-1705
Russian Journal of General Chemistry - On the basis of 4-(thien-2-yl)-3-aminopyridine-2(1H)-one, the corresponding chloroacetamide and condensed 1H-pyrido[2,3-b][1,4]oxazine-2(3H)-one were... 相似文献
2.
Andrey Vyacheslavovich Vasilyev Valeriya Sergeevna Kuznetsova Tatyana Borisovna Bukharova Timofei Evgenevich Grigoriev Yuriy Dmitrievich Zagoskin Irina Alekseevna Nedorubova Igor Ivanovich Babichenko Sergey Nicolaevich Chvalun Dmitry Vadimovich Goldstein Anatoliy Alekseevich Kulakov 《Molecules (Basel, Switzerland)》2021,26(2)
Compositions based on chitosan/β-glycerophosphate hydrogels with highly porous polylactide granules can be used to obtain moldable bone graft materials that have osteoinductive and osteoconductive properties. To eliminate the influence of such characteristics as chain length, degree of purification, and molecular weight on a designed material, the one-stock chitosan sample was reacetylated to degrees of deacetylation (DD%) of 19.5, 39, 49, 55, and 56. A study of the chitosan/β-glycerophosphate hydrogel with chitosan of a reduced DD% showed that a low degree of deacetylation increased the MSCs (multipotent stromal cells) viability rate in vitro and reduced the leukocyte infiltration in subcutaneous implantation to Wistar rats in vivo. The addition of 12 wt% polylactide granules resulted in optimal composite mechanical and moldable properties, and increased the modulus of elasticity of the hydrogel-based material by approximately 100 times. Excessive filling of the material with PLA (polylactide) granules (more than 20%) led to material destruction at a ~10% strain. Osteoinductive and osteoconductive properties of the chitosan hydrogel-based material with reacetylated chitosan (39 DD%) and highly porous polylactide granules impregnated with BMP-2 (bone morphogenetic protein-2) have been demonstrated in models of orthotopic and ectopic bone formation. When implanted into a critical-size calvarial defect in rats, the optimal concentration of BMP-2 was 10 μg/mL: bone tissue areas filled the entire material’s thickness. Implantation of the material with 50 μg/mL BMP-2 was accompanied with excessive growth of bone tissue and material displacement beyond the defect. Significant osteoinductive and osteoconductive properties of the material with 10 μg/mL of BMP-2 were also shown in subcutaneous implantation. 相似文献
3.
Stalinskaya A. L. Shulgau Z. T. Sergazy Sh. D. Gulyaev A. E. Turdybekov D. M. Turdybekov K. M. Kulakov I. V. 《Russian Journal of General Chemistry》2022,92(2):147-153
Russian Journal of General Chemistry - A three-component reaction of 3,5-diacetyl-2,6-dimethylpyridine, p-N-dimethylaminobenzaldehyde and phenylhydrazine in the presence of KOH in ethanol gave the... 相似文献
4.
Dmitry S. Goncharov Ivan V. Kulakov Alexander S. Fisyuk 《Chemistry of Heterocyclic Compounds》2017,53(12):1335-1339
5.
6.
A. Yu. Kurchenkov A. S. Kulakov N. I. Alekseev A. E. Kalinushkin 《Physics of Atomic Nuclei》2013,76(13):1578-1585
For controlling the linear power density in the reactor core, the Khortitsa-M software program as a part of the in-core instrumentation system (ICIS) employs only self-powered neutron detector (SPND) data with the neutronic calculation for the consistent determination of the power density in unmeasurable fuel assemblies (FAs). The confidence of the interpretation of the SPND data essentially determines the safe and efficient operation of a reactor. Previously, it was assumed that the gamma-ray fraction in the reactor radiation does not exceed one percent and is independent of the fuel enrichment and the FA and SPND burnups. Since it is difficult to estimate the contribution of the reactor gamma radiation to the SPND current experimentally, in this work, we present a calculated estimate using modern software and libraries of constants. On the basis of the results of this study, the question is discussed whether it is appropriate to take into account the reactor gamma radiation in the transfer function from the SPND current to the power density of six fuel elements surrounding the SPND with allowance for both the type of FA and the FA and SPND burnups. 相似文献
7.
N. I. Alekseev S. N. Bol’shagin E. A. Gomin S. S. Gorodkov M. I. Gurevich M. A. Kalugin A. S. Kulakov S. V. Marin A. P. Novosel’tsev D. S. Oleynik A. V. Pryanichnikov E. A. Sukhino-Khomenko D. A. Shkarovskiy M. S. Yudkevich 《Physics of Atomic Nuclei》2012,75(14):1634-1646
The software developed within the framework of the MCU project which implements the Monte Carlo method for solving the transport equations for various kinds of radiation is widely used for calculating nuclear reactors of different types. The final version of MCU-5 is described. The developed libraries of constants are briefly described, and the potentialities of the MCU-5 package modules and the executable codes compiled from them are characterized. Examples of important problems of reactor physics solved with the codes from the MCU family are presented. 相似文献
8.
I. V. Kulakov O. A. Nurkenov D. M. Turdybekov A. S. Mahmutova S. B. Ahmetova R. B. Sejdahmetova K. M. Turdybekov 《Chemistry of Heterocyclic Compounds》2010,46(2):240-244
Optimal conditions were found for the synthesis of a number of new N-aminoglycosides of the alkaloid cytisine, using commercially
available monosaccharides, namely, D-glucose, D-galactose, D-xylose, and L-arabinose. X-ray structural analysis indicated
an absolute β-anomeric configuration of N-(β-D-galactopyranosyl)cytisine in the crystalline state. The comparative cytotoxicity
of cytisine and some of its N-aminoglycosides was determined. 相似文献
9.
10.
V. M. Kulakov 《Hyperfine Interactions》1990,61(1-4):1233-1246
The method of investigation of an electronic structure of chemical compounds and solids by high resolution measurement of
internal conversion electron spectra for low-energy isomeric transitions is described. 相似文献