19 research outputs found
ΠΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΊΠ°Π½Π°Π»ΡΠ½ΡΡ Π±Π»ΠΎΠΊΠ°ΡΠΎΡΠΎΠ² NMDA ΡΠ΅ΡΠ΅ΠΏΡΠΎΡΠ° Π² ΡΡΠ΄Ρ ΠΊΠΎΠ½ΡΡΠ³Π°ΡΠΎΠ² ΠΌΠ΅ΡΠΈΠ»Π΅Π½ΠΎΠ²ΠΎΠ³ΠΎ ΡΠΈΠ½Π΅Π³ΠΎ Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ QSAR ΠΈ ΠΌΠΎΠ»Π΅ΠΊΡΠ»ΡΡΠ½ΠΎΠ³ΠΎ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ
29 conjugates of methylene blue and four chemical structures, including derivatives of carbazole, tetrahydrocarbazole, substituted indoles and Ξ³-carboline, combined with a 1-oxopropylene spacer have been studied as channel blockers of the NMDA receptor (binding site of MK-801) by using four QSAR methods (multiple linear regression, random forest, support vector machine, Gaussian process) and molecular docking. QSAR models have satisfactory characteristics. The analysis of regression models at the statistical level revealed an important role of the hydrogen bond in the complex formation. This was also confirmed by the study of modeled by docking complexes. It was found that the increase in the inhibitory activity of the part of compounds could be attributed to appearance of additional H bonds between the ligands and the receptor.Π‘ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ 4-Ρ
ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ² QSAR (ΠΌΠ½ΠΎΠΆΠ΅ΡΡΠ²Π΅Π½Π½Π°Ρ Π»ΠΈΠ½Π΅ΠΉΠ½Π°Ρ ΡΠ΅Π³ΡΠ΅ΡΡΠΈΡ, ΡΠ»ΡΡΠ°ΠΉΠ½ΡΠΉ Π»Π΅Ρ, ΠΌΠ΅ΡΠΎΠ΄ ΠΎΠΏΠΎΡΠ½ΡΡ
Π²Π΅ΠΊΡΠΎΡΠΎΠ², Π³Π°ΡΡΡΠΎΠ²ΡΠΊΠΈΠΉ ΠΏΡΠΎΡΠ΅ΡΡ) ΠΈ ΠΌΠΎΠ»Π΅ΠΊΡΠ»ΡΡΠ½ΠΎΠ³ΠΎ Π΄ΠΎΠΊΠΈΠ½Π³Π° ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½Ρ Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ Π±Π»ΠΎΠΊΠ°ΡΠΎΡΠΎΠ² NMDA ΡΠ΅ΡΠ΅ΠΏΡΠΎΡΠ° (ΡΠ°ΠΉΡ ΡΠ²ΡΠ·ΡΠ²Π°Π½ΠΈΡ ΠΠ-801) 29 ΠΊΠΎΠ½ΡΡΠ³Π°ΡΠΎΠ² ΠΌΠ΅ΡΠΈΠ»Π΅Π½ΠΎΠ²ΠΎΠ³ΠΎ ΡΠΈΠ½Π΅Π³ΠΎ ΠΈ ΡΠ΅ΡΡΡΠ΅Ρ
ΡΠΈΠΏΠΎΠ² ΡΠΎΠ΅Π΄ΠΈΠ½Π΅Π½ΠΈΠΉ, Π²ΠΊΠ»ΡΡΠ°Ρ ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄Π½ΡΠ΅ ΠΊΠ°ΡΠ±Π°Π·ΠΎΠ»Π°, ΡΠ΅ΡΡΠ°Π³ΠΈΠ΄ΡΠΎΠΊΠ°ΡΠ±Π°Π·ΠΎΠ»Π°, Π·Π°ΠΌΠ΅ΡΠ΅Π½Π½ΡΡ
ΠΈΠ½Π΄ΠΎΠ»ΠΎΠ² ΠΈ Ξ³-ΠΊΠ°ΡΠ±ΠΎΠ»ΠΈΠ½Π°, ΠΎΠ±ΡΠ΅Π΄ΠΈΠ½Π΅Π½Π½ΡΡ
1-ΠΎΠΊΡΠΎΠΏΡΠΎΠΏΠΈΠ»Π΅Π½ΠΎΠ²ΡΠΌ ΡΠΏΠ΅ΠΉΡΠ΅ΡΠΎΠΌ. ΠΠΎΠ»ΡΡΠ΅Π½Π½ΡΠ΅ QSAR ΠΌΠΎΠ΄Π΅Π»ΠΈ ΠΈΠΌΠ΅ΡΡ ΡΠ΄ΠΎΠ²Π»Π΅ΡΠ²ΠΎΡΠΈΡΠ΅Π»ΡΠ½ΡΠ΅ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ. ΠΠ° ΠΎΡΠ½ΠΎΠ²Π΅ Π°Π½Π°Π»ΠΈΠ·Π° ΡΠ΅Π³ΡΠ΅ΡΡΠΈΠΎΠ½Π½ΡΡ
ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ Π½Π° ΡΡΠ°ΡΠΈΡΡΠΈΡΠ΅ΡΠΊΠΎΠΌ ΡΡΠΎΠ²Π½Π΅ Π²ΡΡΠ²Π»Π΅Π½Π° Π²Π°ΠΆΠ½Π°Ρ ΡΠΎΠ»Ρ Π²ΠΎΠ΄ΠΎΡΠΎΠ΄Π½ΠΎΠΉ ΡΠ²ΡΠ·ΠΈ ΠΏΡΠΈ ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΠΈ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ°. ΠΡΠΎ Π½Π°ΡΠ»ΠΎ ΠΏΠΎΠ΄ΡΠ²Π΅ΡΠΆΠ΄Π΅Π½ΠΈΠ΅ ΠΏΡΠΈ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΈ ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠΎΠ², ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΡΡ
ΠΌΠΎΠ»Π΅ΠΊΡΠ»ΡΡΠ½ΡΠΌ Π΄ΠΎΠΊΠΈΠ½Π³ΠΎΠΌ. Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΠ΅ ΠΈΠ½Π³ΠΈΠ±ΠΈΡΡΡΡΠ΅ΠΉ ΡΠΏΠΎΡΠΎΠ±Π½ΠΎΡΡΠΈ ΡΠ°ΡΡΠΈ ΠΈΡΡΠ»Π΅Π΄ΡΠ΅ΠΌΡΡ
ΡΠΎΠ΅Π΄ΠΈΠ½Π΅Π½ΠΈΠΉ ΠΎΠ±ΡΡΠ»ΠΎΠ²Π»Π΅Π½ΠΎ ΠΏΠΎΡΠ²Π»Π΅Π½ΠΈΠ΅ΠΌ Π΄ΠΎΠΏΠΎΠ»Π½ΠΈΡΠ΅Π»ΡΠ½ΡΡ
Π-ΡΠ²ΡΠ·Π΅ΠΉ ΠΌΠ΅ΠΆΠ΄Ρ Π»ΠΈΠ³Π°Π½Π΄Π°ΠΌΠΈ ΠΈ ΡΠ΅ΡΠ΅ΠΏΡΠΎΡΠΎΠΌ
Investigation of the prompt neutron emission mechanism in low energy fission of
A series of experiments has been performed to measure prompt neutron angular and energy distributions from thermal neutron-induced fission of 235,233U in correlation with the fission fragments. These distributions have been analyzed with the assumption of neutron isotropic emission from accelerated fission fragments. The performed analysis demonstrates that all obtained results can be described within 5% accuracy using this assumption. This discrepancy is approximately constant and doesnβt depend on fragment mass and the total kinetic energy (TKE). Some minor peculiarities of angular distribution may be interpreted as a result of anisotropy of the fission neutron angular distribution in the fragment center-of-mass system
Investigation of the prompt neutron emission mechanism in low energy fission of 235,233U(nth, f) and 252Cf(sf)
A series of experiments has been performed to measure prompt neutron angular and energy distributions from thermal neutron-induced fission of 235,233U in correlation with the fission fragments. These distributions have been analyzed with the assumption of neutron isotropic emission from accelerated fission fragments. The performed analysis demonstrates that all obtained results can be described within 5% accuracy using this assumption. This discrepancy is approximately constant and doesnβt depend on fragment mass and the total kinetic energy (TKE). Some minor peculiarities of angular distribution may be interpreted as a result of anisotropy of the fission neutron angular distribution in the fragment center-of-mass system
Angular distributions and anisotropy of fission fragments from neutron-induced fission of 239Pu, 237Np, and natPb in energy range 1β200 MeV
This work summarizes some results of a series of experiments aimed at the investigation of energy dependence of anisotropy of fission fragments (FFs) in (n, f) reactions for neutron energies from low to intermediate. Angular distributions of FFs from the neutron-induced fission of 239Pu, 237Np, and natPb have been measured in the energy range 1β200 MeV at the neutron TOF spectrometer GNEIS based on the spallation neutron source at 1 GeV proton synchrocyclotron of the Petersburg Nuclear Physics Institute (Gatchina, Russia). The anisotropies of FFs deduced from the measured angular distributions are presented. In the neutron energy range above 20 MeV the results have been obtained for the first time in our works. The experimental data for FF anisotropy in 237Np(n, f) are compared with calculations based on "adapted" TALYS software
Angular distributions and anisotropy of fission fragments from neutron-induced fission of
This work summarizes some results of a series of experiments aimed at the investigation of energy dependence of anisotropy of fission fragments (FFs) in (n, f) reactions for neutron energies from low to intermediate. Angular distributions of FFs from the neutron-induced fission of 239Pu, 237Np, and natPb have been measured in the energy range 1β200 MeV at the neutron TOF spectrometer GNEIS based on the spallation neutron source at 1 GeV proton synchrocyclotron of the Petersburg Nuclear Physics Institute (Gatchina, Russia). The anisotropies of FFs deduced from the measured angular distributions are presented. In the neutron energy range above 20 MeV the results have been obtained for the first time in our works. The experimental data for FF anisotropy in 237Np(n, f) are compared with calculations based on "adapted" TALYS software
Algae as indicators of a biogeographical zonation in the early carboniferous of the Urals, Siberia and Northeast Russia
Mass, Kinetic Energy and Neutron Emission of Fragments in Spontaneous Fission 252Cf, 244Cm, 248Cm.
Abstract not availableJRC.D-Institute for Reference Materials and Measurements (Geel