191 research outputs found
Determination of adsorption isotherms of organic compounds on human serum albumin by static headspace gas-chromatographic analysis
A procedure is suggested for determination of adsorption isotherms of organic compounds on a protein via the procedure of static headspace gas-chromatographic analysis. With this technique, the n-propanol and n-undecane adsorption isotherms on human serum albumin (HSA) were measured. To test the procedure, the adsorption isotherms of n-octane, n-propanol, and toluene on porous silica Cabosil M5 were determined. The sorbate monolayer volume, adsorption equilibrium constant, and specific surface area were calculated by the BET equation for these systems. It was shown that, unlike the case of porous silica for which the specific monolayer volume is virtually independent of the sorbate type, the volume of n-undecane monolayer on HSA is almost 400 times less than that of water monolayer on horse serum albumin and other proteins
ΠΠ°Π΄Π°ΡΠ° Π΄Π΅ΡΠ΅Π½ΡΡΠ°Π»ΡΠ·ΠΎΠ²Π°Π½ΠΎΠ³ΠΎ ΠΏΡΠΈΠΉΠ½ΡΡΡΡ ΡΡΡΠ΅Π½Ρ Π΄Π»Ρ ΡΡΡΠ°ΡΠ½ΠΈΡ Ρ ΠΌΠ°ΡΠ½ΠΈΡ ΠΏΠΎΡΠ»ΡΠ³
The organization of modern cloud services is based on theoretical results in logistics, operations research, supply chains, information transmission (transportation) networks, and on the practical achievements of the novel information and communication technologies. As all the inhabitants of the planet become regular users and at the same time creators of such services, the issues of decentralized decision making are becoming everyday problems. The paper presents the setup for the problem of such solutions by suppliers (providers) of cloud services and suggests a mathematical formulation of the corresponding optimization problem with resource constraints. It is a starting point for further mathematical elaboration of the new everyday problems.
Pages of the article in the issue: 32 - 38
Language of the article: UkrainianΠΡΠ³Π°Π½ΡΠ·Π°ΡΡΡ ΡΡΡΠ°ΡΠ½ΠΈΡ
Ρ
ΠΌΠ°ΡΠ½ΠΈΡ
ΠΏΠΎΡΠ»ΡΠ³ ΡΠΏΠΈΡΠ°ΡΡΡΡΡ ΡΠΊ Π½Π° ΡΠ΅ΠΎΡΠ΅ΡΠΈΡΠ½Ρ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠΈ Π· Π»ΠΎΠ³ΡΡΡΠΈΠΊΠΈ, Π΄ΠΎΡΠ»ΡΠ΄ΠΆΠ΅Π½Π½Ρ ΠΎΠΏΠ΅ΡΠ°ΡΡΠΉ, Π»Π°Π½ΡΡΠ³ΡΠ² ΠΏΠΎΡΡΠ°ΡΠ°Π½Π½Ρ, ΠΌΠ΅ΡΠ΅ΠΆ ΠΏΠ΅ΡΠ΅Π΄Π°ΡΡ (ΡΡΠ°Π½ΡΠΏΠΎΡΡΡΠ²Π°Π½Π½Ρ) ΡΠ½ΡΠΎΡΠΌΠ°ΡΡΡ, ΡΠ°ΠΊ Ρ Π½Π° ΠΏΡΠ°ΠΊΡΠΈΡΠ½Ρ Π΄ΠΎΡΡΠ³Π½Π΅Π½Π½Ρ Π½ΠΎΠ²ΡΡΠ½ΡΡ
ΡΠ½ΡΠΎΡΠΌΠ°ΡΡΠΉΠ½ΠΎ-ΠΊΠΎΠΌΡΠ½ΡΠΊΠ°ΡΡΠΉΠ½ΠΈΡ
ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΡΠΉ. ΠΡΠΊΡΠ»ΡΠΊΠΈ Π²ΡΡ ΠΌΠ΅ΡΠΊΠ°Π½ΡΡ ΠΏΠ»Π°Π½Π΅ΡΠΈ ΡΡΠ°ΡΡΡ ΠΏΠΎΡΡΡΠΉΠ½ΠΈΠΌΠΈ ΠΊΠΎΡΠΈΡΡΡΠ²Π°ΡΠ°ΠΌΠΈ Ρ Π²ΠΎΠ΄Π½ΠΎΡΠ°Ρ ΡΠ²ΠΎΡΡΡΠΌΠΈ ΡΠ°ΠΊΠΈΡ
ΠΏΠΎΡΠ»ΡΠ³, ΡΠΎ ΠΏΠΈΡΠ°Π½Π½Ρ Π΄Π΅ΡΠ΅Π½ΡΡΠ°Π»ΡΠ·ΠΎΠ²Π°Π½ΠΎΠ³ΠΎ ΠΏΡΠΈΠΉΠ½ΡΡΡΡ ΡΡΡΠ΅Π½Ρ ΡΡΠ°ΡΡΡ ΠΏΠΎΠ²ΡΡΠΊΠ΄Π΅Π½Π½ΠΈΠΌΠΈ. Π£ ΡΠΎΠ±ΠΎΡΡ Π²ΠΈΠΊΠ»Π°Π΄Π°ΡΡΡΡΡ ΠΏΠΎΡΡΠ°Π½ΠΎΠ²ΠΊΠ° ΠΏΡΠΎΠ±Π»Π΅ΠΌΠΈ ΡΠ°ΠΊΠΈΡ
ΡΡΡΠ΅Π½Ρ Π· Π±ΠΎΠΊΡ ΠΏΠΎΡΡΠ°ΡΠ°Π»ΡΠ½ΠΈΠΊΡΠ² (ΠΏΡΠΎΠ²Π°ΠΉΠ΄Π΅ΡΡΠ²) Ρ
ΠΌΠ°ΡΠ½ΠΈΡ
ΠΏΠΎΡΠ»ΡΠ³ Ρ ΠΏΡΠΎΠΏΠΎΠ½ΡΡΡΡΡΡ ΠΌΠ°ΡΠ΅ΠΌΠ°ΡΠΈΡΠ½Π΅ ΡΠΎΡΠΌΡΠ»ΡΠ²Π°Π½Π½Ρ Π²ΡΠ΄ΠΏΠΎΠ²ΡΠ΄Π½ΠΎΡ Π·Π°Π΄Π°ΡΡ ΠΎΠΏΡΠΈΠΌΡΠ·Π°ΡΡΡ Π· ΡΠ΅ΡΡΡΡΠ½ΠΈΠΌΠΈ ΠΎΠ±ΠΌΠ΅ΠΆΠ΅Π½Π½ΡΠΌΠΈ.
Π Π΅Π·ΡΠ»ΡΡΠ°ΡΠΈ Π΄ΠΎΡΠ»ΡΠ΄ΠΆΠ΅Π½Π½Ρ Π΄ΠΎΠΏΠΎΠ²ΡΠ΄Π°Π»ΠΈΡΡ Π½Π° ΠΡΠΆΠ½Π°ΡΠΎΠ΄Π½ΡΠΉ Π½Π°ΡΠΊΠΎΠ²ΡΠΉ ΠΊΠΎΠ½ΡΠ΅ΡΠ΅Π½ΡΡΡ ``"Modern Stochastics: Theory and Applications. V" (MSTA-V)
ΠΠΎΡΠ»ΡΠ΄ΠΆΠ΅Π½Π½Ρ ΡΠΎΡΠ±ΡΡΡ ΡΠ΅ΡΡΠ°Π°Π»ΠΊΡΠ»ΡΠ½ΠΈΡ ΠΏΠΎΡ ΡΠ΄Π½ΠΈΡ ΠΊΠ°Π»ΡΠΊΡ[4]Π°ΡΠ΅Π½ΡΠ² Ρ ΠΊΠ°Π»ΡΠΊΡ[4]ΡΠ΅Π·ΠΎΡΡΠΈΠ½Π°ΡΠ΅Π½ΡΠ² Π· ΠΏΠΎΠ²Π΅ΡΡ Π½Π΅Ρ LiChrosorb RP 18 ΠΌΠ΅ΡΠΎΠ΄Π°ΠΌΠΈ ΠΠ€ ΠΠΠ Π₯ ΡΠ° ΠΌΠΎΠ»Π΅ΠΊΡΠ»ΡΡΠ½ΠΎΠ³ΠΎ ΠΌΠΎΠ΄Π΅Π»ΡΠ²Π°Π½Π½Ρ
Tetrahydroxycalix[4]arene, tetraalkoxycalix[4]arenes and tetraalkylcalix[4]resorcinarenes are capable to reversible adsorption on the surface of the hydrophobic support LiChrosorb RP 18 under conditions of the reversed-phase high performance liquid chromatography. The main chromatographic characteristics of tetrahydroxycalix[4]arene, a series of tetraalkoxycalix[4]arenes and tetraalkylcalix[4]resorcinarenes have been determined. It has been found that in the conditions selected (the mobile phase is acetonitrile/water, 86/14, v/v) the retention times of the compounds studied are in the wide range from 4.67 min to 88.0 min depending on the nature of the substituents in the macrocyclic skeleton of the molecule. Thus, the retention times increase with increase of the length of the alkyl substituents at the lower rim of the calixarene macrocycle. According to the molecular modelling data the most effective sorption is explained by the inclusion of LiChrosorb RP 18 octadecyl groups into the lipophilic cavity formed by the alkyl substituents at the lower rim of the macrocycle of calixarene/calixresorcinarene. Thus, the molecular cavity formed by the benzene rings remains opened for the Host-Guest complexation with the analyte molecules. This sorption of tetraalkoxycalix[4]arenes and tetraalkylcalix[4]arenes on the LiChrosorb RP 18 surface can significantly improve its resolution ability in RP HPLC analysis. The influence of replacement of tetrahydroxycalix[4]arene hydroxyl protons with the alkyl groups on the conformation of the macrocycle has been studied.Π’Π΅ΡΡΠ°Π³ΠΈΠ΄ΡΠΎΠΊΡΠΈΠΊΠ°Π»ΠΈΠΊΡ[4]Π°ΡΠ΅Π½, ΡΠ΅ΡΡΠ°Π°Π»ΠΊΠΎΠΊΡΠΈΠΊΠ°Π»ΠΈΠΊΡ[4]Π°ΡΠ΅Π½Ρ ΠΈ ΡΠ΅ΡΡΠ°Π°Π»ΠΊΠΈΠ»ΠΊΠ°Π»ΠΈΠΊΡ[4]ΡΠ΅Π·ΠΎΡΡΠΈΠ½Π°ΡΠ΅Π½Ρ ΠΎΠ±ΡΠ°ΡΠΈΠΌΠΎ ΡΠΎΡΠ±ΠΈΡΡΡΡΡΡ Π½Π° ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ Π³ΠΈΠ΄ΡΠΎΡΠΎΠ±Π½ΠΎΠΉ Π½Π°ΡΠ°Π΄ΠΊΠΈ LiChrosorb RP 18 Π² ΡΡΠ»ΠΎΠ²ΠΈΡΡ
ΠΎΠ±ΡΠ°ΡΠ΅Π½Π½ΠΎ-ΡΠ°Π·Π½ΠΎΠΉ Π²ΡΡΠΎΠΊΠΎΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΠΉ ΠΆΠΈΠ΄ΠΊΠΎΡΡΠ½ΠΎΠΉ Ρ
ΡΠΎΠΌΠ°ΡΠΎΠ³ΡΠ°ΡΠΈΠΈ. ΠΠΏΡΠ΅Π΄Π΅Π»Π΅Π½Ρ ΠΎΡΠ½ΠΎΠ²Π½ΡΠ΅ Ρ
ΡΠΎΠΌΠ°ΡΠΎΠ³ΡΠ°ΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ ΡΠ΅ΡΡΠ°Π³ΠΈΠ΄ΡΠΎΠΊΡΠΈΠΊΠ°Π»ΠΈΠΊΡ[4]Π°ΡΠ΅Π½Π°, ΡΠ΅ΡΠΈΠΈ ΡΠ΅ΡΡΠ°Π°Π»ΠΊΠΎΠΊΡΠΈΠΊΠ°Π»ΠΈΠΊΡ[4]Π°ΡΠ΅Π½ΠΎΠ² ΠΈ ΡΠ΅ΡΡΠ°Π°Π»ΠΊΠΈΠ»ΠΊΠ°Π»ΠΈΠΊΡ[4]ΡΠ΅Π·ΠΎΡΡΠΈΠ½Π°ΡΠ΅Π½ΠΎΠ². Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ Π² Π²ΡΠ±ΡΠ°Π½Π½ΡΡ
ΡΡΠ»ΠΎΠ²ΠΈΡΡ
(ΠΏΠΎΠ΄Π²ΠΈΠΆΠ½Π°Ρ ΡΠ°Π·Π° β Π°ΡΠ΅ΡΠΎΠ½ΠΈΡΡΠΈΠ»/Π²ΠΎΠ΄Π° Π² ΡΠΎΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΠΈ 86/14 ΠΏΠΎ ΠΎΠ±ΡΠ΅ΠΌΡ) Π²ΡΠ΅ΠΌΠ΅Π½Π° ΡΠ΄Π΅ΡΠΆΠΈΠ²Π°Π½ΠΈΡ ΠΈΡΡΠ»Π΅Π΄ΡΠ΅ΠΌΡΡ
ΡΠΎΠ΅Π΄ΠΈΠ½Π΅Π½ΠΈΠΉ Π½Π°Ρ
ΠΎΠ΄ΡΡΡΡ Π² ΡΠΈΡΠΎΠΊΠΎΠΌ Π΄ΠΈΠ°ΠΏΠ°Π·ΠΎΠ½Π΅ 4.67-88.0 ΠΌΠΈΠ½ Π² Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠΈ ΠΎΡ ΠΏΡΠΈΡΠΎΠ΄Ρ Π·Π°ΠΌΠ΅ΡΡΠΈΡΠ΅Π»Π΅ΠΉ Π² ΠΌΠ°ΠΊΡΠΎΡΠΈΠΊΠ»ΠΈΡΠ΅ΡΠΊΠΎΠΌ ΡΠΊΠ΅Π»Π΅ΡΠ΅ ΠΌΠΎΠ»Π΅ΠΊΡΠ»Ρ. ΠΡΠΈ ΡΡΠΎΠΌ Π²ΡΠ΅ΠΌΡ ΡΠ΄Π΅ΡΠΆΠΈΠ²Π°Π½ΠΈΡ Π²ΠΎΠ·ΡΠ°ΡΡΠ°Π΅Ρ ΠΏΠΎ ΠΌΠ΅ΡΠ΅ ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΡ Π΄Π»ΠΈΠ½Ρ Π°Π»ΠΊΠΈΠ»ΡΠ½ΡΡ
Π·Π°ΠΌΠ΅ΡΡΠΈΡΠ΅Π»Π΅ΠΉ Π½Π° Π½ΠΈΠΆΠ½Π΅ΠΌ ΠΎΠ±ΠΎΠ΄Π΅ ΠΊΠ°Π»ΠΈΠΊΡΠ°ΡΠ΅Π½ΠΎΠ²ΠΎΠ³ΠΎ ΠΌΠ°ΠΊΡΠΎΡΠΈΠΊΠ»Π°. Π‘ΠΎΠ³Π»Π°ΡΠ½ΠΎ Π΄Π°Π½Π½ΡΠΌ ΠΌΠΎΠ»Π΅ΠΊΡΠ»ΡΡΠ½ΠΎΠ³ΠΎ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π½Π°ΠΈΠ±ΠΎΠ»Π΅Π΅ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½Π°Ρ ΡΠΎΡΠ±ΡΠΈΡ ΠΏΡΠΎΠΈΡΡ
ΠΎΠ΄ΠΈΡ Π·Π° ΡΡΠ΅Ρ Π²ΠΊΠ»ΡΡΠ΅Π½ΠΈΡ ΠΎΠΊΡΠ°Π΄Π΅ΡΠΈΠ»ΡΠ½ΠΈΡ
Π³ΡΡΠΏΠΏ Π½Π°ΡΠ°Π΄ΠΊΠΈ Π² Π»ΠΈΠΏΠΎΡΠΈΠ»ΡΠ½ΡΡ ΠΏΠΎΠ»ΠΎΡΡΡ, ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½Π½ΡΡ Π°Π»ΠΊΠΈΠ»ΡΠ½ΡΠΌΠΈ Π·Π°ΠΌΠ΅ΡΡΠΈΡΠ΅Π»ΡΠΌΠΈ Π½ΠΈΠΆΠ½Π΅Π³ΠΎ ΠΎΠ±ΠΎΠ΄Π° ΠΌΠ°ΠΊΡΠΎΡΠΈΠΊΠ»Π° ΠΊΠ°Π»ΠΈΠΊΡΠ°ΡΠ΅Π½Π°/ΠΊΠ°Π»ΠΈΠΊΡΡΠ΅Π·ΠΎΡΡΠΈΠ½Π°ΡΠ΅Π½Π°. ΠΡΠΈ ΡΡΠΎΠΌ ΠΌΠΎΠ»Π΅ΠΊΡΠ»ΡΡΠ½Π°Ρ ΠΏΠΎΠ»ΠΎΡΡΡ, ΡΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½Π½Π°Ρ Π±Π΅Π½Π·ΠΎΠ»ΡΠ½ΡΠΌΠΈ ΠΊΠΎΠ»ΡΡΠ°ΠΌΠΈ ΠΌΠ°ΠΊΡΠΎΡΠΈΠΊΠ»Π°, ΠΎΡΡΠ°Π΅ΡΡΡ ΠΎΡΠΊΡΡΡΠΎΠΉ Π΄Π»Ρ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠΎΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΡ Ρ ΠΌΠΎΠ»Π΅ΠΊΡΠ»Π°ΠΌΠΈ Π°Π½Π°Π»ΠΈΡΠΎΠ². Π’Π°ΠΊΠ°Ρ ΡΠΎΡΠ±ΡΠΈΡ ΡΠ΅ΡΡΠ°Π°Π»ΠΊΠΎΠΊΡΠΈΠΊΠ°Π»ΠΈΠΊΡ[4]Π°ΡΠ΅Π½ΠΎΠ² ΠΈ ΡΠ΅ΡΡΠ°Π°Π»ΠΊΠΈΠ»ΠΊΠ°Π»ΠΈΠΊΡ[4]ΡΠ΅Π·ΠΎΡΡΠΈΠ½Π°ΡΠ΅Π½ΠΎΠ² Π½Π° ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ Ρ
ΡΠΎΠΌΠ°ΡΠΎΠ³ΡΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ Π½Π°ΡΠ°Π΄ΠΊΠΈ LiChrosorb RP 18 ΠΌΠΎΠΆΠ΅Ρ ΡΡΡΠ΅ΡΡΠ²Π΅Π½Π½ΠΎ ΡΠ»ΡΡΡΠΈΡΡ Π΅Π΅ ΡΠ΅Π»Π΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΠΏΠΎ ΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΡ ΠΊ Π°Π½Π°Π»ΠΈΡΠ°ΠΌ Π² ΡΡΠ»ΠΎΠ²ΠΈΡΡ
ΠΎΠ±ΡΠ°ΡΠ΅Π½Π½ΠΎ-ΡΠ°Π·Π½ΠΎΠΉ Π²ΡΡΠΎΠΊΠΎΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΠΉ ΠΆΠΈΠ΄ΠΊΠΎΡΡΠ½ΠΎΠΉ Ρ
ΡΠΎΠΌΠ°ΡΠΎΠ³ΡΠ°ΡΠΈΠΈ. ΠΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΎ Π²Π»ΠΈΡΠ½ΠΈΠ΅ Π·Π°ΠΌΠ΅Π½Ρ Π³ΠΈΠ΄ΡΠΎΠΊΡΠΈΠ»ΡΠ½ΡΡ
ΠΏΡΠΎΡΠΎΠ½ΠΎΠ² ΡΠ΅ΡΡΠ°Π³ΠΈΠ΄ΡΠΎΠΊΡΠΈΠΊΠ°Π»ΠΈΠΊΡ[4]Π°ΡΠ΅Π½Π° Π°Π»ΠΊΠΈΠ»ΡΠ½ΡΠΌΠΈ Π³ΡΡΠΏΠΏΠ°ΠΌΠΈ Π½Π° ΠΊΠΎΠ½ΡΠΎΡΠΌΠ°ΡΠΈΡ ΠΌΠ°ΠΊΡΠΎΡΠΈΠΊΠ»ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠΊΠ΅Π»Π΅ΡΠ° ΠΌΠΎΠ»Π΅ΠΊΡΠ»Ρ.Π’Π΅ΡΡΠ°Π³ΡΠ΄ΡΠΎΠΊΡΠΈΠΊΠ°Π»ΡΠΊΡ[4]Π°ΡΠ΅Π½, ΡΠ΅ΡΡΠ°Π°Π»ΠΊΠΎΠΊΡΠΈΠΊΠ°Π»ΡΠΊΡ[4]Π°ΡΠ΅Π½ΠΈ ΡΠ° ΡΠ΅ΡΡΠ°Π°Π»ΠΊΡΠ»ΠΊΠ°Π»ΡΠΊΡ[4]ΡΠ΅Π·ΠΎΡΡΠΈΠ½Π°ΡΠ΅Π½ΠΈ Π·Π΄Π°ΡΠ½Ρ Π΄ΠΎ ΠΎΠ±Π΅ΡΠ½Π΅Π½ΠΎΡ ΡΠΎΡΠ±ΡΡΡ Π½Π° ΠΏΠΎΠ²Π΅ΡΡ
Π½Ρ Π³ΡΠ΄ΡΠΎΡΠΎΠ±Π½ΠΎΡ Π½Π°ΡΠ°Π΄ΠΊΠΈ LiChrosorb RP 18 Π² ΡΠΌΠΎΠ²Π°Ρ
ΠΎΠ±Π΅ΡΠ½Π΅Π½ΠΎ-ΡΠ°Π·Π½ΠΎΡ Π²ΠΈΡΠΎΠΊΠΎΠ΅ΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡ ΡΡΠ΄ΠΈΠ½Π½ΠΎΡ Ρ
ΡΠΎΠΌΠ°ΡΠΎΠ³ΡΠ°ΡΡΡ. ΠΠΈΠ·Π½Π°ΡΠ΅Π½Ρ ΠΎΡΠ½ΠΎΠ²Π½Ρ Ρ
ΡΠΎΠΌΠ°ΡΠΎΠ³ΡΠ°ΡΡΡΠ½Ρ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ ΡΠ΅ΡΡΠ°Π³ΡΠ΄ΡΠΎΠΊΡΠΈΠΊΠ°Π»ΡΠΊΡ[4]Π°ΡΠ΅Π½Ρ, Π½ΠΈΠ·ΠΊΠΈ ΡΠ΅ΡΡΠ°Π°Π»ΠΊΠΎΠΊΡΠΈΠΊΠ°Π»ΡΠΊΡ[4]Π°ΡΠ΅Π½ΡΠ² ΡΠ° ΡΠ΅ΡΡΠ°Π°Π»ΠΊΡΠ»ΠΊΠ°Π»ΡΠΊΡ[4]ΡΠ΅Π·ΠΎΡΡΠΈΠ½Π°ΡΠ΅Π½ΡΠ². ΠΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΠΎ Ρ Π²ΠΈΠ±ΡΠ°Π½ΠΈΡ
ΡΠΌΠΎΠ²Π°Ρ
(ΡΡΡ
ΠΎΠΌΠ° ΡΠ°Π·Π° β Π°ΡΠ΅ΡΠΎΠ½ΡΡΡΠΈΠ»/Π²ΠΎΠ΄Π° Ρ ΡΠΏΡΠ²Π²ΡΠ΄Π½ΠΎΡΠ΅Π½Π½Ρ 86/14 Π·Π° ΠΎΠ±βΡΠΌΠΎΠΌ) ΡΠ°Ρ ΡΡΡΠΈΠΌΠ°Π½Π½Ρ Π΄ΠΎΡΠ»ΡΠ΄ΠΆΡΠ²Π°Π½ΠΈΡ
ΡΠΏΠΎΠ»ΡΠΊ Π·Π½Π°Ρ
ΠΎΠ΄ΠΈΡΡΡΡ Π² ΡΠΈΡΠΎΠΊΠΎΠΌΡ Π΄ΡΠ°ΠΏΠ°Π·ΠΎΠ½Ρ 4.67-88.0 Ρ
Π² Π² Π·Π°Π»Π΅ΠΆΠ½ΠΎΡΡΡ Π²ΡΠ΄ ΠΏΡΠΈΡΠΎΠ΄ΠΈ Π·Π°ΠΌΡΡΠ½ΠΈΠΊΡΠ² Ρ ΠΌΠ°ΠΊΡΠΎΡΠΈΠΊΠ»ΡΡΠ½ΠΎΠΌΡ ΠΊΡΡΡΡΠΊΡ ΠΊΠ°Π»ΡΠΊΡΠ°ΡΠ΅Π½Ρ. ΠΡΠΈ ΡΡΠΎΠΌΡ ΡΠ°Ρ ΡΡΡΠΈΠΌΠ°Π½Π½Ρ Π·ΡΠΎΡΡΠ°Ρ ΠΏΠΎ ΠΌΡΡΡ Π·Π±ΡΠ»ΡΡΠ΅Π½Π½Ρ Π΄ΠΎΠ²ΠΆΠΈΠ½ΠΈ Π°Π»ΠΊΡΠ»ΡΠ½ΠΈΡ
Π·Π°ΠΌΡΡΠ½ΠΈΠΊΡΠ² Π½Π° Π½ΠΈΠΆΠ½ΡΠΎΠΌΡ Π²ΡΠ½ΡΡ ΠΊΠ°Π»ΡΠΊΡΠ°ΡΠ΅Π½ΠΎΠ²ΠΎΠ³ΠΎ ΠΌΠ°ΠΊΡΠΎΡΠΈΠΊΠ»Ρ. ΠΠ³ΡΠ΄Π½ΠΎ Π· Π΄Π°Π½ΠΈΠΌΠΈ ΠΌΠΎΠ»Π΅ΠΊΡΠ»ΡΡΠ½ΠΎΠ³ΠΎ ΠΌΠΎΠ΄Π΅Π»ΡΠ²Π°Π½Π½Ρ Π½Π°ΠΉΠ±ΡΠ»ΡΡ Π΅ΡΠ΅ΠΊΡΠΈΠ²Π½Π° ΡΠΎΡΠ±ΡΡΡ Π²ΡΠ΄Π±ΡΠ²Π°ΡΡΡΡΡ Π·Π° ΡΠ°Ρ
ΡΠ½ΠΎΠΊ Π²ΠΊΠ»ΡΡΠ΅Π½Π½Ρ ΠΎΠΊΡΠ°Π΄Π΅ΡΠΈΠ»ΡΠ½ΠΈΡ
Π³ΡΡΠΏ Π½Π°ΡΠ°Π΄ΠΊΠΈ LiChrosorb RP 18 Π² Π»ΡΠΏΠΎΡΡΠ»ΡΠ½Ρ ΠΏΠΎΡΠΎΠΆΠ½ΠΈΠ½Ρ, ΡΡΠ²ΠΎΡΠ΅Π½Ρ Π°Π»ΠΊΡΠ»ΡΠ½ΠΈΠΌΠΈ Π·Π°ΠΌΡΡΠ½ΠΈΠΊΠ°ΠΌΠΈ Π½ΠΈΠΆΠ½ΡΠΎΠ³ΠΎ Π²ΡΠ½ΡΡ ΠΌΠ°ΠΊΡΠΎΡΠΈΠΊΠ»Ρ ΠΊΠ°Π»ΡΠΊΡΠ°ΡΠ΅Π½Ρ/ΠΊΠ°Π»ΡΠΊΡΡΠ΅Π·ΠΎΡΡΠΈΠ½Π°ΡΠ΅Π½Ρ. ΠΡΠΈ ΡΡΠΎΠΌΡ ΠΌΠΎΠ»Π΅ΠΊΡΠ»ΡΡΠ½Π° ΠΏΠΎΡΠΎΠΆΠ½ΠΈΠ½Π°, ΡΡΠΎΡΠΌΠΎΠ²Π°Π½Π° Π±Π΅Π½Π·Π΅Π½ΠΎΠ²ΠΈΠΌΠΈ ΠΊΡΠ»ΡΡΡΠΌΠΈ ΠΌΠ°ΠΊΡΠΎΡΠΈΠΊΠ»Ρ, Π·Π°Π»ΠΈΡΠ°ΡΡΡΡΡ Π²ΡΠ΄ΠΊΡΠΈΡΠΎΡ Π΄Π»Ρ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠΎΡΡΠ²ΠΎΡΠ΅Π½Π½Ρ Π· ΠΌΠΎΠ»Π΅ΠΊΡΠ»Π°ΠΌΠΈ Π°Π½Π°Π»ΡΡΡΠ².Π’Π°ΠΊΠ° ΡΠΎΡΠ±ΡΡΡ ΡΠ΅ΡΡΠ°Π°Π»ΠΊΠΎΠΊΡΠΈΠΊΠ°Π»ΡΠΊΡ[4]Π°ΡΠ΅Π½ΡΠ² ΡΠ° ΡΠ΅ΡΡΠ°Π°Π»ΠΊΡΠ»ΠΊΠ°Π»ΡΠΊΡ[4]ΡΠ΅Π·ΠΎΡΡΠΈΠ½Π°ΡΠ΅Π½ΡΠ² Π½Π° ΠΏΠΎΠ²Π΅ΡΡ
Π½Ρ Ρ
ΡΠΎΠΌΠ°ΡΠΎΠ³ΡΠ°ΡΡΡΠ½ΠΎΡ Π½Π°ΡΠ°Π΄ΠΊΠΈ ΡΠΈΠΏΡ LiChrosorb RP 18 ΠΌΠΎΠΆΠ΅ ΡΡΡΡΡΠ²ΠΎ ΠΏΠΎΠ»ΡΠΏΡΠΈΡΠΈ ΡΡ ΡΠΎΠ·Π΄ΡΠ»ΡΠ½Ρ Π·Π΄Π°ΡΠ½ΡΡΡΡ ΠΏΠΎ Π²ΡΠ΄Π½ΠΎΡΠ΅Π½Π½Ρ Π΄ΠΎ Π°Π½Π°Π»ΡΡΡΠ² Π² ΡΠΌΠΎΠ²Π°Ρ
ΠΎΠ±Π΅ΡΠ½Π΅Π½ΠΎ-ΡΠ°Π·Π½ΠΎΡ Π²ΠΈΡΠΎΠΊΠΎΠ΅ΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡ ΡΡΠ΄ΠΈΠ½Π½ΠΎΡ Ρ
ΡΠΎΠΌΠ°ΡΠΎΠ³ΡΠ°ΡΡΡ. ΠΠΎΡΠ»ΡΠ΄ΠΆΠ΅Π½ΠΎ Π²ΠΏΠ»ΠΈΠ² Π·Π°ΠΌΡΠ½ΠΈ Π³ΡΠ΄ΡΠΎΠΊΡΠΈΠ»ΡΠ½ΠΈΡ
ΠΏΡΠΎΡΠΎΠ½ΡΠ² ΡΠ΅ΡΡΠ°Π³ΡΠ΄ΡΠΎΠΊΡΠΈΠΊΠ°Π»ΡΠΊΡ[4]Π°ΡΠ΅Π½Ρ Π°Π»ΠΊΡΠ»ΡΠ½ΠΈΠΌΠΈ Π³ΡΡΠΏΠ°ΠΌΠΈ Π½Π° ΠΊΠΎΠ½ΡΠΎΡΠΌΠ°ΡΡΡ ΠΌΠ°ΠΊΡΠΎΡΠΈΠΊΠ»ΡΡΠ½ΠΎΠ³ΠΎ ΠΊΡΡΡΡΠΊΠ° ΠΌΠΎΠ»Π΅ΠΊΡΠ»ΠΈ
Stabilization of silica nanoparticles dispersions by surface modification with silicon derivative of thiacalix[4]arene
Β© 2015, Springer Science+Business Media Dordrecht. For the first time, silica nanopowder functionalized with thiacalixarene derivatives was synthesized by ultrasonication of nanoparticles (diameter 23.7Β Β±Β 2.4Β nm) with organosilicon derivative of thiacalixarene in glacial acetic acid. The protocol resulted in the formation of colloidal solution of low-disperse (polydispersity index of 0.11) submicron-sized (diameter 192.5Β nm) clusters of nanoparticles according to the dynamic light scattering data. As defined by scanning electron microscopy (SEM), mean diameter of thiacalixarene-functionalized nanoparticles is equal to 25.5Β Β±Β 2.5Β nm and the shape is close to spherical. SEM images confirm low aggregation of thiacalixarene-modified nanoparticle compared to initial silica nanopowder (mean diameter of aggregates 330 and 429Β nm, correspondingly). According to the thermogravimetry/differential scanning calorimetry and elemental analysis of the nanoparticles obtained, 5Β % of the powder mass was related to thiacalixarene units. The effect of thiacalixarene functionalization of silica nanoparticles on linear polydimethylsiloxane (PDMS)βsilica dispersions was modeled to achieve high resistance toward liquid media required for similar solβgel prepared PDMS-based materials applied for solid-phase microextraction. In such a manner, the influence of thiacalixarene-modified nanofiller on thermal stability and resistance against polar organic solvents was estimated. Similarity of decomposition temperature of both thiacalixarene-functionalized nanoparticles and non-functionalized silica nanoparticles was found. Swelling/solubility behavior observed was related to partial dissolution of PDMS/silica (10Β % mixture) in alcohols. Thiacalixarene-functionalized silica particles exerted significantly higher resistance of PDMS/silica composites toward alcohol solvents
Synthesis of Macrocyclic Stereoisomers Substituted with Oligolactide Fragments
Β© 2018, Pleiades Publishing, Ltd. Acylation of cone and 1,3-alternate stereoisomers of hydrazides of p-tert-butylthaicalix[4]arene tetrasubstituted at the lower rim with S,S-lactide in dimethylsulfoxide has afforded the macrocyclic oligolactide derivatives containing 16 (cone) to 24 (1,3-alternate) lactide fragments. It has been shown that nanosized aggregates (80 nm) are formed with silver nitrate in the case of the cone stereoisomer containing the oligolactide fragments at one side of the macrocyclic rim, whereas submicron particles (400 nm) are formed in the case of the 1,3-alternate conformation when the substituents are at different sides of the macrocycle
The thermodynamics of molecular recognition in supramolecular systems based on calyxarenes
The publications of the authors concerned with seeking simple structure-property relations for the thermodynamic parameters of intermolecular interactions in solid guest-host inclusion compounds with the participation of three receptors, namely, tert-butylcalyx[4]arene, tert-butylthiocalyx[4]arene, and 2,2β²-bis(9-hydroxy-9-fluorenyl)biphenyl, are briefly reviewed. Rules determining structure-property correlations can exist for guest-host inclusion compounds. Generally, the correlations obtained are nonlinear
Sorption of hydrocarbons by leached chernozem
The sorption of n-octane, n-nonane, n-decane, decalin, and p-xylene on oven-dried and differently wetted leached chemozem, zeolite-bearing rock, and limestone was studied using static headspace-gas chromatography. It was found that leached chernozem exhibits a high capacity for selective sorption of hydrocarbons and has significantly heterogeneous sorption sites. Thermodynamic parameters of sorption, specific surface of sorbents, and the fractal dimension of soil surface were determined. An increase in the soil moisture content significantly inhibited the sorption of the hydrocarbons studied. Copyright Β© 2003 by MAIK "Nauka/Interperiodica" (Russia)
Formation of coloring complexes in glass colored with cerium and titanium oxides
The valence state of cerium and titanium ions in barium-strontium aluminosilicate glass with a different ratio of cerium and titanium oxides was investigated and the possible composition of the cerium-titanium complexes formed in silicate glass was analyzed. It was found that an active separate reaction between cerium and titanium
oxides with the appearance of complex color centers takes place in synthesis of the glass. It is hypothesized that color centers primarily form between tetravalent cerium and tetravalent titanium in glass-forming melts
Non-Weyl asymptotics for quantum graphs with general coupling conditions
Inspired by a recent result of Davies and Pushnitski, we study resonance
asymptotics of quantum graphs with general coupling conditions at the vertices.
We derive a criterion for the asymptotics to be of a non-Weyl character. We
show that for balanced vertices with permutation-invariant couplings the
asymptotics is non-Weyl only in case of Kirchhoff or anti-Kirchhoff conditions,
while for graphs without permutation numerous examples of non-Weyl behaviour
can be constructed. Furthermore, we present an insight helping to understand
what makes the Kirchhoff/anti-Kirchhoff coupling particular from the resonance
point of view. Finally, we demonstrate a generalization to quantum graphs with
nonequal edge weights.Comment: minor changes, to appear in Pierre Duclos memorial issue of J. Phys.
A: Math. Theo
Particle Propagation on a Circle with a Point Interaction
We study a particle propagation on a circle in the presence of a point
interaction. We show that the one-particle Feynman kernel can be written into
the sum of reflected and transmitted trajectories which are weighted by the
elements of the n-th power of the scattering matrix evaluated on a line with a
point interaction. As a by-product we find three-parameter family of trace
formulae as a generalization of the Poisson summation formula.Comment: 21 pages, 12 figure
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