756 research outputs found
Π‘ΠΈΠ½ΡΠ΅Π· ΡΠ° Π΄ΡΡΡΠ΅ΡΠΈΡΠ½Π° Π΄ΡΡ 8-Π°ΠΌΡΠ½ΠΎΠ·Π°ΠΌΡΡΠ΅Π½ΠΈΡ 7-(2-Π³ΡΠ΄ΡΠΎΠΊΡΠΈ-3-ΠΏ-ΠΌΠ΅ΡΠΎΠΊΡΠΈΡΠ΅Π½ΠΎΠΊΡΠΈΠΏΡΠΎΠΏΡΠ»-1)-3-ΠΌΠ΅ΡΠΈΠ»ΠΊΡΠ°Π½ΡΠΈΠ½Ρ
It has been found that natural xanthines, as well as their synthetic analogs, possess the diuretic effect. Analysis of the literature proves that there is a great opportunity of applying synthetic derivatives of N-methylated xanthines as potential diuretics.Aim. To develop preparative methods of the synthesis of 8-aminosubstituted of 7-(2-hydroxy-3-p-metoxyphenoxypropyl-1)-3-methylxanthine and study their physical, chemical and biological properties. Results. The synthesis of a series of 8-aminosubstituted of 7-(2-hydroxy-3-p-metoxyphenoxypropyl-1)-3-methylxanthine was carried out. According to the results of the biological testing the compounds synthesized belong to the toxicity of class IV. 7-(2-Hydroxy-3-p-methoxyphenoxypropyl-1)-8-(furyl-2-methylamino)-3-methylxanthine xanthine shows the highest diuretic activity, and hence, requires a more in-depth study since it is twice more active than hydrochlorothiazide. It should be emphasized that all compounds synthesized exhibit a marked diuretic effect. Experimental part. 8-Bromo-7-(2-hydroxy-3-p-methoxyphenoxypropyl-1)-3-methylxanthine was obtained by heating 8-bromo-3-methylxanthine with p-methoxyphenoxymethyloxirane in butanol-1 and in the presence of N,N-dimethylbenzylamine. 8-Aminosubstitutied of 7-(2-hydroxy-3-p-metoxyphenoxypropyl-1)-3-methylxanthine was obtained by boiling of bromoalcohol with the primary and secondary amines. The structure of the compounds synthesized was unambiguously confirmed by NMR-spectroscopy. The acute toxicity of the compounds obtained was studied by Kerber method. The study of the diuretic activity of the compounds was carried out using Ye. Berkhin method. Hydrochlorothiazide was used as a reference substance. Conclusions. Simple methods for the synthesis of 8-amino-7- (2-hydroxy-3-p-methoxyphenoxypropyl-1)-3-methylxanthines have been developed. The structure of the compounds synthesized has been confirmed by the method of NMR 1H-spectroscopy. The acute toxicity and the diuretic activity of the compounds obtained have been studied.ΠΠ·Π²Π΅ΡΡΠ½ΠΎ, ΡΡΠΎ ΠΊΠ°ΠΊ ΠΏΡΠΈΡΠΎΠ΄Π½ΡΠ΅ ΠΊΡΠ°Π½ΡΠΈΠ½Ρ, ΡΠ°ΠΊ ΠΈ ΠΈΡ
ΡΠΈΠ½ΡΠ΅ΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ Π°Π½Π°Π»ΠΎΠ³ΠΈ ΠΎΠ±Π»Π°Π΄Π°ΡΡ Π΄ΠΈΡΡΠ΅ΡΠΈΡΠ΅ΡΠΊΠΈΠΌ Π΄Π΅ΠΉΡΡΠ²ΠΈΠ΅ΠΌ. ΠΠ½Π°Π»ΠΈΠ· Π΄Π°Π½Π½ΡΡ
Π»ΠΈΡΠ΅ΡΠ°ΡΡΡΡ ΡΠ²ΠΈΠ΄Π΅ΡΠ΅Π»ΡΡΡΠ²ΡΠ΅Ρ ΠΎ Π·Π½Π°ΡΠΈΡΠ΅Π»ΡΠ½ΠΎΠΉ ΠΏΠ΅ΡΡΠΏΠ΅ΠΊΡΠΈΠ²Π΅ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ ΡΠΈΠ½ΡΠ΅ΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄Π½ΡΡ
N-ΠΌΠ΅ΡΠΈΠ»ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΠΊΡΠ°Π½ΡΠΈΠ½ΠΎΠ² Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΠΏΠΎΡΠ΅Π½ΡΠΈΠ°Π»ΡΠ½ΡΡ
Π΄ΠΈΡΡΠ΅ΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΡΠ΅Π΄ΡΡΠ². Π¦Π΅Π»Ρ Π΄Π°Π½Π½ΠΎΠΉ ΡΠ°Π±ΠΎΡΡ β ΡΠ°Π·ΡΠ°Π±ΠΎΡΠΊΠ° ΠΏΡΠ΅ΠΏΠ°ΡΠ°ΡΠΈΠ²Π½ΡΡ
ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ² ΡΠΈΠ½ΡΠ΅Π·Π° 8-Π°ΠΌΠΈΠ½ΠΎΠ·Π°ΠΌΠ΅ΡΠ΅Π½Π½ΡΡ
7-(2-Π³ΠΈΠ΄ΡΠΎΠΊΡΠΈ-3-ΠΏ-ΠΌΠ΅ΡΠΎΠΊΡΠΈΡΠ΅Π½ΠΎΠΊΡΠΈΠΏΡΠΎΠΏΠΈΠ»-1)-3-ΠΌΠ΅ΡΠΈΠ»ΠΊΡΠ°Π½ΡΠΈΠ½Π° ΠΈ ΠΈΠ·ΡΡΠ΅Π½ΠΈΠ΅ ΠΈΡ
ΡΠΈΠ·ΠΈΠΊΠΎ-Ρ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈ Π±ΠΈΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠ²ΠΎΠΉΡΡΠ². Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΈ ΠΈΡ
ΠΎΠ±ΡΡΠΆΠ΄Π΅Π½ΠΈΠ΅. Π‘ΠΈΠ½ΡΠ΅Π·ΠΈΡΠΎΠ²Π°Π½ ΡΡΠ΄ 8-Π°ΠΌΠΈΠ½ΠΎΠ·Π°ΠΌΠ΅ΡΠ΅Π½Π½ΡΡ
7-(2-Π³ΠΈΠ΄ΡΠΎΠΊΡΠΈ-3-ΠΏ-ΠΌΠ΅ΡΠΎΠΊΡΠΈΡΠ΅Π½ΠΎΠΊΡΠΈΠΏΡΠΎΠΏΠΈΠ»-1)-3-ΠΌΠ΅ΡΠΈΠ»ΠΊΡΠ°Π½ΡΠΈΠ½Π°. ΠΠΎ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠ°ΠΌ Π±ΠΈΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈΡΠΏΡΡΠ°Π½ΠΈΠΉ ΡΠΈΠ½ΡΠ΅Π·ΠΈΡΠΎΠ²Π°Π½Π½ΡΠ΅ ΡΠΎΠ΅Π΄ΠΈΠ½Π΅Π½ΠΈΡ ΠΎΡΠ½ΠΎΡΡΡΡΡ ΠΊ IV ΠΊΠ»Π°ΡΡΡ ΡΠΎΠΊΡΠΈΡΠ½ΠΎΡΡΠΈ. 7-(2-ΠΠΈΠ΄ΡΠΎΠΊΡΠΈ-3-ΠΏ-ΠΌΠ΅ΡΠΎΠΊΡΠΈΡΠ΅Π½ΠΎΠΊΡΠΈΠΏΡΠΎΠΏΠΈΠ»-1)-8-(ΡΡΡΠΈΠ»-2-ΠΌΠ΅ΡΠΈΠ»Π°ΠΌΠΈΠ½ΠΎ)-3-ΠΌΠ΅ΡΠΈΠ»ΠΊΡΠ°Π½ΡΠΈΠ½ ΠΈΠΌΠ΅Π΅Ρ Π½Π°ΠΈΠ±ΠΎΠ»ΡΡΡΡ Π΄ΠΈΡΡΠ΅ΡΠΈΡΠ΅ΡΠΊΡΡ Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ, Π° ΡΠ»Π΅Π΄ΠΎΠ²Π°ΡΠ΅Π»ΡΠ½ΠΎ Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΠΎ Π΄ΠΎΡΠΊΠΎΠ½Π°Π»ΡΠ½ΠΎΠ΅ ΠΈΠ·ΡΡΠ΅Π½ΠΈΠ΅, ΠΏΠΎΡΠΊΠΎΠ»ΡΠΊΡ ΠΎΠ½ Π±ΠΎΠ»Π΅Π΅ ΡΠ΅ΠΌ Π² 2 ΡΠ°Π·Π° Π°ΠΊΡΠΈΠ²Π½Π΅Π΅Β Π³ΠΈΠ΄ΡΠΎΡ
Π»ΠΎΡΡΠΈΠ°Π·ΠΈΠ΄Π°. ΠΠ΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΠΎ ΠΏΠΎΠ΄ΡΠ΅ΡΠΊΠ½ΡΡΡ, ΡΡΠΎ Π²ΡΠ΅ ΡΠΈΠ½ΡΠ΅Π·ΠΈΡΠΎΠ²Π°Π½Π½ΡΠ΅ ΡΠΎΠ΅Π΄ΠΈΠ½Π΅Π½ΠΈΡ ΠΎΠΊΠ°Π·ΡΠ²Π°ΡΡ Π²ΡΡΠ°ΠΆΠ΅Π½Π½ΠΎΠ΅ Π΄ΠΈΡΡΠ΅ΡΠΈΡΠ΅ΡΠΊΠΎΠ΅ Π΄Π΅ΠΉΡΡΠ²ΠΈΠ΅. ΠΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½Π°Ρ ΡΠ°ΡΡΡ. 8-ΠΡΠΎΠΌ-7-(2-Π³ΠΈΠ΄ΡΠΎΠΊΡΠΈ-3-ΠΏ-ΠΌΠ΅ΡΠΎΠΊΡΠΈΡΠ΅Π½ΠΎΠΊΡΠΈΒΠΏΡΠΎΠΏΠΈΠ»-1)-3-ΠΌΠ΅ΡΠΈΠ»ΠΊΡΠ°Π½ΡΠΈΠ½ ΠΏΠΎΠ»ΡΡΠ΅Π½ Π½Π°Π³ΡΠ΅Π²Π°Π½ΠΈΠ΅ΠΌ 8-Π±ΡΠΎΠΌ-3-ΠΌΠ΅ΡΠΈΠ»ΠΊΡΠ°Π½ΡΠΈΠ½Π° Ρ ΠΏ-ΠΌΠ΅ΡΠΎΠΊΡΠΈΡΠ΅Π½ΠΎΠΊΡΠΈΠΌΠ΅ΡΠΈΠ»ΠΎΠΊΡΠΈΡΠ°Π½ΠΎΠΌ Π² Π±ΡΡΠ°Π½ΠΎΠ»Π΅-1 Π² ΠΏΡΠΈΡΡΡΡΡΠ²ΠΈΠΈ N,N-Π΄ΠΈΠΌΠ΅ΡΠΈΠ»Π±Π΅Π½Π·ΠΈΠ»Π°ΠΌΠΈΠ½Π°. 8-ΠΠΌΠΈΠ½ΠΎΠ·Π°ΠΌΠ΅ΡΠ΅Π½Π½ΡΠ΅ 7-(2-Π³ΠΈΠ΄ΡΠΎΠΊΡΠΈ-3-ΠΏ-ΠΌΠ΅ΡΠΎΠΊΡΠΈΒΡΠ΅Π½ΠΎΠΊΡΠΈΠΏΡΠΎΠΏΠΈΠ»-1)-3-ΠΌΠ΅ΡΠΈΠ»ΠΊΡΠ°Π½ΡΠΈΠ½Π° ΡΠΈΠ½ΡΠ΅Π·ΠΈΡΠΎΠ²Π°Π½Ρ ΠΏΡΡΠ΅ΠΌ ΠΊΠΈΠΏΡΡΠ΅Π½ΠΈΡ Π±ΡΠΎΠΌΠΎΡΠΏΠΈΡΡΠ° Ρ ΠΏΠ΅ΡΠ²ΠΈΡΠ½ΡΠΌΠΈ ΠΈ Π²ΡΠΎΡΠΈΡΠ½ΡΠΌΠΈ Π°ΠΌΠΈΠ½Π°ΠΌΠΈ. Π‘ΡΡΡΠΊΡΡΡΠ° ΡΠΈΠ½ΡΠ΅Π·ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΡΠΎΠ΅Π΄ΠΈΠ½Π΅Π½ΠΈΠΉ ΠΎΠ΄Π½ΠΎΠ·Π½Π°ΡΠ½ΠΎ Π΄ΠΎΠΊΠ°Π·Π°Π½Π° ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ ΠΠΠ -ΡΠΏΠ΅ΠΊΡΡΠΎΡΠΊΠΎΠΏΠΈΠΈ. ΠΡΡΡΠ°Ρ ΡΠΎΠΊΡΠΈΡΠ½ΠΎΡΡΡ ΡΠΈΠ½ΡΠ΅Π·ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΡΠΎΠ΅Π΄ΠΈΠ½Π΅Π½ΠΈΠΉ ΠΈΠ·ΡΡΠ°Π»Π°ΡΡ ΠΏΠΎ ΠΌΠ΅ΡΠΎΠ΄Ρ ΠΠ΅ΡΠ±Π΅ΡΠ°. ΠΠ·ΡΡΠ΅Π½ΠΈΠ΅ Π΄ΠΈΡΡΠ΅ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΡΡ
ΡΠΎΠ΅Π΄ΠΈΠ½Π΅Π½ΠΈΠΉ ΠΏΡΠΎΠ²ΠΎΠ΄ΠΈΠ»ΠΈ ΠΏΠΎ ΠΌΠ΅ΡΠΎΠ΄Ρ ΠΠ΅ΡΡ
ΠΈΠ½Π° Π. Π. Π ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΡΡΠ°Π»ΠΎΠ½Π° ΡΡΠ°Π²Π½Π΅Π½ΠΈΡ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π»ΠΈ Π³ΠΈΠ΄ΡΠΎΡ
Π»ΠΎΡΡΠΈΠ°Π·ΠΈΠ΄. ΠΡΠ²ΠΎΠ΄Ρ. Π Π°Π·ΡΠ°Π±ΠΎΡΠ°Π½Ρ ΠΏΡΠΎΡΡΡΠ΅ Π² Π²ΡΠΏΠΎΠ»Π½Π΅Π½ΠΈΠΈ ΠΌΠ΅ΡΠΎΠ΄ΠΈΠΊΠΈ ΡΠΈΠ½ΡΠ΅Π·Π° 8-Π°ΠΌΠΈΠ½ΠΎΠ·Π°ΠΌΠ΅ΡΠ΅Π½Π½ΡΡ
7-(2-Π³ΠΈΠ΄ΡΠΎΠΊΡΠΈ-3-ΠΏ-ΠΌΠ΅ΡΠΎΠΊΡΠΈΡΠ΅Π½ΠΎΠΊΡΠΈΠΏΡΠΎΠΏΠΈΠ»-1)-3-ΠΌΠ΅ΡΠΈΠ»ΠΊΡΠ°Π½ΡΠΈΠ½Π°. Π‘ΡΡΡΠΊΡΡΡΠ° ΡΠΈΠ½ΡΠ΅Π·ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΡΠΎΠ΅Π΄ΠΈΠ½Π΅Π½ΠΈΠΉ Π΄ΠΎΠΊΠ°Π·Π°Π½Π° ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ ΠΠΠ -ΡΠΏΠ΅ΠΊΡΡΠΎΡΠΊΠΎΠΏΠΈΠΈ. ΠΠ·ΡΡΠ΅Π½Π° ΠΎΡΡΡΠ°Ρ ΡΠΎΠΊΡΠΈΡΠ½ΠΎΡΡΡ ΠΈ Π΄ΠΈΡΡΠ΅ΡΠΈΡΠ΅ΡΠΊΠ°Ρ Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΡΡ
Π²Π΅ΡΠ΅ΡΡΠ².ΠΡΠ΄ΠΎΠΌΠΎ, ΡΠΎ ΡΠΊ ΠΏΡΠΈΡΠΎΠ΄Π½Ρ ΠΊΡΠ°Π½ΡΠΈΠ½ΠΈ, ΡΠ°ΠΊ Ρ ΡΡ
ΡΠΈΠ½ΡΠ΅ΡΠΈΡΠ½Ρ Π°Π½Π°Π»ΠΎΠ³ΠΈ Π²ΠΈΡΠ²Π»ΡΡΡΡ Π΄ΡΡΡΠ΅ΡΠΈΡΠ½Ρ Π΄ΡΡ. ΠΠ½Π°Π»ΡΠ· Π΄Π°Π½ΠΈΡ
Π»ΡΡΠ΅ΡΠ°ΡΡΡΠΈ ΡΠ²ΡΠ΄ΡΠΈΡΡ ΠΏΡΠΎ Π·Π½Π°ΡΠ½Ρ ΠΏΠ΅ΡΡΠΏΠ΅ΠΊΡΠΈΠ²Ρ Π²ΠΈΠΊΠΎΡΠΈΡΡΠ°Π½Π½Ρ ΡΠΈΠ½ΡΠ΅ΡΠΈΡΠ½ΠΈΡ
ΠΏΠΎΡ
ΡΠ΄Π½ΠΈΡ
N-ΠΌΠ΅ΡΠΈΠ»ΡΠΎΠ²Π°Π½ΠΈΡ
ΠΊΡΠ°Π½ΡΠΈΠ½ΡΠ² Π² ΡΠΊΠΎΡΡΡ ΠΏΠΎΡΠ΅Π½ΡΡΠΉΠ½ΠΈΡ
Π΄ΡΡΡΠ΅ΡΠΈΡΠ½ΠΈΡ
Π·Π°ΡΠΎΠ±ΡΠ². ΠΠ΅ΡΠΎΡ Π΄Π°Π½ΠΎΡ ΡΠΎΠ±ΠΎΡΠΈ Ρ ΡΠΎΠ·ΡΠΎΠ±ΠΊΠ° ΠΏΡΠ΅ΠΏΠ°ΡΠ°ΡΠΈΠ²Π½ΠΈΡ
ΠΌΠ΅ΡΠΎΠ΄ΡΠ² ΡΠΈΠ½ΡΠ΅Π·Ρ 8-Π°ΠΌΡΠ½ΠΎΠ·Π°ΠΌΡΡΠ΅Π½ΠΈΡ
7-(2-Π³ΡΠ΄ΡΠΎΠΊΡΠΈ-3-ΠΏ-ΠΌΠ΅ΡΠΎΠΊΡΠΈΡΠ΅Π½ΠΎΠΊΡΠΈΠΏΡΠΎΠΏΡΠ»-1)-3-ΠΌΠ΅ΡΠΈΠ»ΠΊΡΠ°Π½ΡΠΈΠ½Ρ ΡΠ° Π²ΠΈΠ²ΡΠ΅Π½Π½Ρ ΡΡ
ΡΡΠ·ΠΈΠΊΠΎ-Ρ
ΡΠΌΡΡΠ½ΠΈΡ
ΡΠ° Π±ΡΠΎΠ»ΠΎΠ³ΡΡΠ½ΠΈΡ
Π²Π»Π°ΡΡΠΈΠ²ΠΎΡΡΠ΅ΠΉ. Π Π΅Π·ΡΠ»ΡΡΠ°ΡΠΈ ΡΠ° ΡΡ
ΠΎΠ±Π³ΠΎΠ²ΠΎΡΠ΅Π½Π½Ρ. ΠΡΠ² ΡΠΈΠ½ΡΠ΅Π·ΠΎΠ²Π°Π½ΠΈΠΉ ΡΡΠ΄ 8-Π°ΠΌΡΠ½ΠΎΠ·Π°ΠΌΡΡΠ΅Π½ΠΈΡ
7-(2-Π³ΡΠ΄ΡΠΎΠΊΡΠΈ-3-ΠΏ-ΠΌΠ΅ΡΠΎΠΊΡΠΈΡΠ΅Π½ΠΎΠΊΡΠΈΠΏΡΠΎΠΏΡΠ»-1)-3-ΠΌΠ΅ΡΠΈΠ»ΠΊΡΠ°Π½ΡΠΈΠ½Ρ. ΠΠ° ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠ°ΠΌΠΈ Π±ΡΠΎΠ»ΠΎΠ³ΡΡΠ½ΠΈΡ
Π²ΠΈΠΏΡΠΎΠ±ΡΠ²Π°Π½Ρ ΡΠΈΠ½ΡΠ΅Π·ΠΎΠ²Π°Π½Ρ ΡΠΏΠΎΠ»ΡΠΊΠΈ Π²ΡΠ΄Π½ΠΎΡΡΡΡΡΡ Π΄ΠΎ IV ΠΊΠ»Π°ΡΡ ΡΠΎΠΊΡΠΈΡΠ½ΠΎΡΡΡ. 7-(2-ΠΡΠ΄ΡΠΎΠΊΡΠΈ-3-ΠΏ-ΠΌΠ΅ΡΠΎΠΊΡΠΈΡΠ΅Π½ΠΎΠΊΡΠΈΠΏΡΠΎΠΏΡΠ»-1)-8-(ΡΡΡΠΈΠ»-2-ΠΌΠ΅ΡΠΈΠ»Π°ΠΌΡΠ½ΠΎ)-3-ΠΌΠ΅ΡΠΈΠ»ΠΊΡΠ°Π½ΡΠΈΠ½ Π²ΠΈΡΠ²Π»ΡΡ Π½Π°ΠΉΠ²ΠΈΡΡ Π΄ΡΡΡΠ΅ΡΠΈΡΠ½Ρ Π°ΠΊΡΠΈΠ²Π½ΡΡΡΡ, Π° ΠΎΡΠΆΠ΅ ΠΏΠΎΡΡΠ΅Π±ΡΡ Π±ΡΠ»ΡΡ Π΄ΠΎΡΠΊΠΎΠ½Π°Π»ΠΎΠ³ΠΎ Π²ΠΈΠ²ΡΠ΅Π½Π½Ρ, ΠΎΡΠΊΡΠ»ΡΠΊΠΈ Π²ΡΠ½ Π±ΡΠ»ΡΡ Π½ΡΠΆ Ρ 2 ΡΠ°Π·ΠΈ Π°ΠΊΡΠΈΠ²Π½ΡΡΠΈΠΉ Π·Π° Π³ΡΠ΄ΡΠΎΡ
Π»ΠΎΡΡΡΠ°Π·ΠΈΠ΄. ΠΠ΅ΠΎΠ±Ρ
ΡΠ΄Π½ΠΎ ΠΏΡΠ΄ΠΊΡΠ΅ΡΠ»ΠΈΡΠΈ, ΡΠΎ Π²ΡΡ ΡΠΈΠ½ΡΠ΅Π·ΠΎΠ²Π°Π½Ρ ΡΠΏΠΎΠ»ΡΠΊΠΈ Π²ΠΈΡΠ²Π»ΡΡΡΡ Π²ΠΈΡΠ°Π·Π½Ρ Π΄ΡΡΡΠ΅ΡΠΈΡΠ½Ρ Π΄ΡΡ.ΠΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½Π° ΡΠ°ΡΡΠΈΠ½Π°. 8-ΠΡΠΎΠΌΠΎ-7-(2-Π³ΡΠ΄ΡΠΎΠΊΡΠΈ-3-ΠΏ-ΠΌΠ΅ΡΠΎΠΊΡΠΈΡΠ΅Π½ΠΎΠΊΡΠΈΠΏΡΠΎΠΏΡΠ»-1)-3-ΠΌΠ΅ΡΠΈΠ»ΠΊΡΠ°Π½ΡΠΈΠ½ ΠΎΡΡΠΈΠΌΠ°Π»ΠΈ Π½Π°Π³ΡΡΠ²Π°Π½Π½ΡΠΌ 8-Π±ΡΠΎΠΌΠΎ-3-ΠΌΠ΅ΡΠΈΠ»ΠΊΡΠ°Π½ΡΠΈΠ½Ρ Π· ΠΏ-ΠΌΠ΅ΡΠΎΠΊΡΠΈΡΠ΅Π½ΠΎΠΊΡΠΈΠΌΠ΅ΡΠΈΠ»ΠΎΠΊΡΠΈΡΠ°Π½ΠΎΠΌ Ρ Π±ΡΡΠ°Π½ΠΎΠ»Ρ-1 Π² ΠΏΡΠΈΡΡΡΠ½ΠΎΡΡΡ N,N-Π΄ΠΈΠΌΠ΅ΡΠΈΠ»Π±Π΅Π½Π·ΠΈΠ»Π°ΠΌΡΠ½Ρ. 8-ΠΠΌΡΠ½ΠΎΠ·Π°ΠΌΡΡΠ΅Π½Ρ 7-(2-Π³ΡΠ΄ΡΠΎΠΊΡΠΈ-3-ΠΏ-ΠΌΠ΅ΡΠΎΠΊΡΠΈΡΠ΅Π½ΠΎΠΊΡΠΈΠΏΡΠΎΠΏΡΠ»-1)-3-ΠΌΠ΅ΡΠΈΠ»ΠΊΡΠ°Π½ΡΠΈΠ½Ρ ΡΠΈΠ½ΡΠ΅Π·ΠΎΠ²Π°Π½Ρ ΡΠ»ΡΡ
ΠΎΠΌ ΠΊΠΈΠΏβΡΡΡΠ½Π½Ρ Π±ΡΠΎΠΌΠΎΡΠΏΠΈΡΡΡ Π· ΠΏΠ΅ΡΠ²ΠΈΠ½Π½ΠΈΠΌΠΈ ΡΠ° Π²ΡΠΎΡΠΈΠ½Π½ΠΈΠΌΠΈ Π°ΠΌΡΠ½Π°ΠΌΠΈ. Π‘ΡΡΡΠΊΡΡΡΠ° ΡΠΈΠ½ΡΠ΅Π·ΠΎΠ²Π°Π½ΠΈΡ
ΡΠΏΠΎΠ»ΡΠΊ Π±ΡΠ»Π° ΠΎΠ΄Π½ΠΎΠ·Π½Π°ΡΠ½ΠΎ Π΄ΠΎΠ²Π΅Π΄Π΅Π½Π° ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ ΠΠΠ -ΡΠΏΠ΅ΠΊΡΡΠΎΡΠΊΠΎΠΏΡΡ. ΠΠΎΡΡΡΠ° ΡΠΎΠΊΡΠΈΡΠ½ΡΡΡΡ ΡΠΈΠ½ΡΠ΅Π·ΠΎΠ²Π°Π½ΠΈΡ
ΡΠΏΠΎΠ»ΡΠΊ Π±ΡΠ»Π° Π²ΠΈΠ²ΡΠ΅Π½Π° Π·Π° ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ ΠΠ΅ΡΠ±Π΅ΡΠ°. ΠΠΈΠ²ΡΠ΅Π½Π½Ρ Π΄ΡΡΡΠ΅ΡΠΈΡΠ½ΠΎΡ Π΄ΡΡ ΠΎΡΡΠΈΠΌΠ°Π½ΠΈΡ
ΡΠΏΠΎΠ»ΡΠΊ ΠΏΡΠΎΠ²ΠΎΠ΄ΠΈΠ»ΠΈ Π·Π° ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ ΠΠ΅ΡΡ
ΡΠ½Π° Π. Π. Π ΡΠΊΠΎΡΡΡ Π΅ΡΠ°Π»ΠΎΠ½Ρ ΠΏΠΎΡΡΠ²Π½ΡΠ½Π½Ρ Π²ΠΈΠΊΠΎΡΠΈΡΡΠΎΠ²ΡΠ²Π°Π»ΠΈ Π³ΡΠ΄ΡΠΎΡ
Π»ΠΎΡΡΡΠ°Π·ΠΈΠ΄. ΠΠΈΡΠ½ΠΎΠ²ΠΊΠΈ. ΠΡΠ»ΠΈ ΡΠΎΠ·ΡΠΎΠ±Π»Π΅Π½Ρ ΠΏΡΠΎΡΡΡ Ρ Π²ΠΈΠΊΠΎΠ½Π°Π½Π½Ρ ΠΌΠ΅ΡΠΎΠ΄ΠΈΠΊΠΈ ΡΠΈΠ½ΡΠ΅Π·Ρ 8-Π°ΠΌΡΠ½ΠΎΠ·Π°ΠΌΡΡΠ΅Π½ΠΈΡ
7-(2-Π³ΡΠ΄ΡΠΎΠΊΡΠΈ-3-ΠΏ-ΠΌΠ΅ΡΠΎΠΊΡΠΈΡΠ΅Π½ΠΎΠΊΡΠΈΠΏΡΠΎΠΏΡΠ»-1)-3-ΠΌΠ΅ΡΠΈΠ»ΠΊΡΠ°Π½ΡΠΈΠ½Ρ. Π‘ΡΡΡΠΊΡΡΡΠ° ΡΠΈΠ½ΡΠ΅Π·ΠΎΠ²Π°Π½ΠΈΡ
ΡΠΏΠΎΠ»ΡΠΊ Π±ΡΠ»Π° Π΄ΠΎΠ²Π΅Π΄Π΅Π½Π° ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ ΠΠΠ -ΡΠΏΠ΅ΠΊΡΡΠΎΡΠΊΠΎΠΏΡΡ. ΠΠΈΠ²ΡΠ΅Π½Π° Π³ΠΎΡΡΡΠ° ΡΠΎΠΊΡΠΈΡΠ½ΡΡΡΡ ΡΠ° Π΄ΡΡΡΠ΅ΡΠΈΡΠ½Π° Π°ΠΊΡΠΈΠ²Π½ΡΡΡΡ ΠΎΡΡΠΈΠΌΠ°Π½ΠΈΡ
ΡΠ΅ΡΠΎΠ²ΠΈΠ½
The preventive destruction of a hazardous asteroid
One means of countering a hazardous asteroid is discussed: destruction of the object using a nuclear charge. Explosion of such an asteroid shortly before its predicted collision would have catastrophic consequences, with numerous highly radioactive fragments falling onto the Earth. The possibility of exploding the asteroid several years before its impact is also considered. Such an approach is made feasible because the vast majority of hazardous objects pass by the Earth several times before colliding with it. Computations show that, in the 10 years following the explosion, only a negligible number of fragments fall onto the Earth, whose radioactivity has substantially reduced during this time. In most cases, none of these fragments collides with the Earth. Thus, this proposed method for eliminating a threat from space is reasonable in at least two cases: when it is not possible to undergo a soft removal of the object from the collisional path, and to destroy objects that are continually returning to near-Earth space and require multiple removals from hazardous orbits
Poetics of Book βJourney of Russian Imperial Sloop βDianaβ from Kronstadt to Kamchatka ...β by V. M. Golovnin: Features of Documentary and Fiction Prose
Observations are presented on theΒ features ofΒ theΒ documentary and artistic organization ofΒ theΒ book byΒ V.Β M.Β Golovnin βJourney ofΒ Russian Imperial Sloop βDianaβ from Kronstadt toΒ Kamchatka...β (1819). Such issues as theΒ thematic content ofΒ βJourney...β, theΒ role ofΒ theΒ authorβs worldview in creating a single artistic whole, and theΒ features ofΒ theΒ aesthetic organization ofΒ documentary material are considered. TheΒ significance ofΒ theΒ study is seen in theΒ need to update theΒ memory ofΒ theΒ personality and literary work ofΒ V.Β M.Β Golovnin, an outstanding figure ofΒ Russian culture at theΒ beginning ofΒ theΒ 19th century. TheΒ presented material will allow supplementing with new facts theΒ picture ofΒ theΒ genre and style genesis ofΒ documentary and artistic genres in theΒ Russian historical and literary process ofΒ theΒ early 19th century. TheΒ relevance ofΒ theΒ study is determined by theΒ attention ofΒ modern literary criticism to theΒ poetics ofΒ documentary and artistic genres. TheΒ novelty ofΒ theΒ research is seen in theΒ appeal toΒ aΒ little-known work ofΒ Russian literature ofΒ theΒ first third ofΒ theΒ 19th century. It is reported that theΒ author showed theΒ maritime way ofΒ life with its regulations, traditions, experience ofΒ intercultural communication. TheΒ work is considered in theΒ main thematic lines: everyday life of a round-the-world sea expedition, seascape, battle studies, ethnographic sketches. It is noted that a value-semantic principle is revealed behind theΒ empirical material, which gives theΒ narrative artistic completeness and deeply brings Golovnin's βJourneyΒ ...β with theΒ tradition ofΒ Russian classical literature
THE EGALITARIAN PRINCIPLES OF THE OLD BOHEMIAN STATEHOOD AND THE LEGAL SYSTEM
Purpose: The article is devoted to the study of egalitarian principles of medieval Czech statehood and the legal system.
Methods: The authors pay special attention to the peculiarities of family self-government of the Czech communities, the institution of hazing in land law and the mechanism of reconciliation as an alternative to the death penalty.
Findings: The paper proves that tribal remnants of the customary law of the ancient Czech people in the medieval era contributed to the preservation of egalitarian democratic principles of public administration and justice
Spinning and rotating strings for N=1 SYM theory and brane constructions
We obtain spinning and rotating closed string solutions in AdS_5 \times
T^{1,1} background, and show how these solutions can be mapped onto rotating
closed strings embedded in configurations of intersecting branes in type IIA
string theory. Then, we discuss spinning closed string solutions in the UV
limit of the Klebanov-Tseytlin background, and also properties of classical
solutions in the related intersecting brane constructions in the UV limit. We
comment on extensions of this analysis to the deformed conifold background, and
in the corresponding intersecting brane construction, as well as its relation
to the deep IR limit of the Klebanov-Strassler solution. We briefly discuss on
the relation between type IIA brane constructions and their related M-theory
descriptions, and how solitonic solutions are related in both descriptions.Comment: 35 pages. Dedicated to the memory of Ian I. Kogan. References adde
New advances in Raman study of polyvinylchloride structure
In this work we investigated Raman spectra of a number of industrial grades of polyvinylchloride powder and films, prepared from solutions in tetrahydrofuran and acetophenone. The number and spectral characteristics of the Raman lines in the spectral regions of the C-Cl stretching vibrations and in the region of the C-H and CH2 stretching vibrations were evaluated
Online Education after the Pandemic: Student Problems and Opportunities Research Using Big Data Tools
This paper presents a scientifically based approach to analyzing large volumes of data from digital traces of students on social networks, which allows you to effectively identify emerging and most discussed problems among students, as well as highlight pain points that provide opportunities for growth, development of universities and improvement of the characteristics of the educational process, support for students etc. The study is based on a thematic analysis of messages published in university communities on the VKontakte social network using big data tools. The study results showed that Russian university students still face a number of challenges, including weak technical infrastructure at universities, a digital divide in access to online education, and negative attitudes towards distance learning.The scientific problem of the study is the contradiction between the existing volume of unstructured data of studentsβ digital traces in social networks and the lack of a scientifically-based and proven methodological approach to the analysis and evaluation of this voluminous data, which creates obstacles to fundamental research into the relationship between studentsβ activity in social networks and their satisfaction quality of the educational process. The practical focus is determined in conducting data analysis using big data tools. The findings and evidence-based implications are useful for developing innovative strategies and tools for assessing and supporting students.The results show that the use of big data tools for tracking trends based on digital traces of students on social networks provides highly accurate analytical data and can become the basis for identifying problematic situations in individual universities and the industry as a whole, for data-driven decision-making and management
Applying Aniline for P-doping of PEDOT:PSS Films to Improve Their Conductivity and Efficiency of Perovskite Solar Cells
Poly(3,4- ethylenedioxythiophene):polystyrene sulfonate
(PEDOT: PSS) is responsible for hole extraction efficiency and hole
transport in the perovskite solar cell structure. The inclusion of PSS
reduces the conductivity of the PEDOT films, which inhibits hole
transport and results in a low photo current of the perovskite solar cell.
In this work, an aniline solution was used as an additive in the PEDOT:
PSS thin film to increase electrical conductivity. Two different methods
were used to incorporate the additive: surface and volume treatment.
The results show that the surface treatment with aniline solution can
significantly increase the conductivity of PEDOT: PSS film. Moreover, the photoconversion efficiency of the perovskite solar cell with such a
PEDOT: PSS layer is increased 1.5 times compared to the untreated one
- β¦