142 research outputs found
Revisiting the proposed planetary system orbiting the eclipsing polar HU Aquarii
It has recently been proposed, on the basis of eclipse-timing data, that the
eclipsing polar cataclysmic variable HU Aquarii is host to at least two giant
planets. However, that result has been called into question based upon the
dynamical stability of the proposed planets. In this work, we present a
detailed re-analysis of all eclipse timing data available for the HU Aquarii
system, making use of standard techniques used to fit orbits to radial-velocity
data. We find that the eclipse timings can be used to obtain a two-planet
solution that does not require the presence of additional bodies within the
system. We then perform a highly detailed dynamical analysis of the proposed
planetary system. We show that the improved orbital parameters we have derived
correspond to planets that are dynamically unstable on unfeasibly short
timescales (of order 10^4 years or less). Given these results, we discuss
briefly how the observed signal might in fact be the result of the intrinsic
properties of the eclipsing polar, rather than being evidence of dynamically
improbable planets. Taken in concert, our results highlight the need for
caution in interpreting such timing variations as being planetary in nature.Comment: Accepted for publication in MNRA
ΠΠΎΠ²ΠΈΠΉ ΠΌΠ΅ΡΠΎΠ΄ ΡΠΈΠ½ΡΠ΅Π·Ρ Π°ΡΠΎΠΌΠΎΠΊΡΠ΅ΡΠΈΠ½Ρ ΡΠ° ΠΉΠΎΠ³ΠΎ Π²Π·Π°ΡΠΌΠΎΠ΄ΡΡ Π· Π°Π·ΠΎΠ»ΠΎΠ²ΠΌΡΡΠ½ΠΈΠΌΠΈ ΡΡΠ»ΡΡΠΎΡ Π»ΠΎ- ΡΠΈΠ΄Π°ΠΌΠΈ
A new approach to the synthesis of atomoxetine using the methods of enzymatic catalysis has been developed;the interaction of atomoxetine with a number of azole-containing heterocyclic sulfochlorides has been studied. Thecarbonyl group of 3-chloro-1-phenyl-propane-1-one was region-specifically reduced with NADPH-dependentcarbonylreductase (SSCR) in phosphate buffer solution. In Mitsunoby reaction with o-methylphenole the inversionof the final product configuration takes place and [R]-1-(3-chloro-1-phenypropoxy)-2-methylbenzene is formed.Its further treatment with methylamine results in the base of atomoxetine, which may be isolated from the solutionas a chloride. In order to develop the novel biologically active compounds the series of sufonyl chlorides withoxazole and isoxazole substituents were reacted with atomoxetine. The sulfonamides obtained fully comply withall criteria for the molecules β candidates for the biomedical study.Π Π°Π·ΡΠ°Π±ΠΎΡΠ°Π½ ΠΌΠ΅ΡΠΎΠ΄ ΡΠΈΠ½ΡΠ΅Π·Π° Π°ΡΠΎΠΌΠΎΠΊΡΠ΅ΡΠΈΠ½Π° Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΡΡΠ΅ΡΠ΅ΠΎΡΠΏΠ΅ΡΠΈΡΠΈΡΠ½ΠΎΠ³ΠΎ ΡΠ΅ΡΠΌΠ΅Π½ΡΠ°ΡΠΈΠ²Π½ΠΎΠ³ΠΎ ΠΊΠ°ΡΠ°Π»ΠΈΠ·Π°. ΠΠ°ΡΠ±ΠΎΠ½ΠΈΠ»ΡΠ½Π°Ρ Π³ΡΡΠΏΠΏΠ° Π² ΡΡΡΡΠΊΡΡΡΠ΅ 3-Ρ
Π»ΠΎΡ-1-ΡΠ΅Π½ΠΈΠ»-ΠΏΡΠΎΠΏΠ°Π½-1-ΠΎΠ½Π° ΡΠ΅Π³ΠΈΠΎΡΠΏΠ΅ΡΠΈΡΠΈΡΠ½ΠΎ Π²ΠΎΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½Π° Ρ ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ NADPH-Π·Π°Π²ΠΈΡΠΈΠΌΠΎΠΉ ΠΊΠ°ΡΠ±ΠΎΠ½ΠΈΠ»ΡΠ΅Π΄ΡΠΊΡΠ°Π·Ρ (SSCR) Π² ΡΠΎΡΡΠ°ΡΠ½ΠΎΠΌ Π±ΡΡΠ΅ΡΠ΅. Π ΡΡΠ»ΠΎΠ²ΠΈΡΡ
ΡΠ΅Π°ΠΊΡΠΈΠΈ ΠΠΈΡΡΠ½ΠΎΠ±Ρ Ρ ΠΎ-ΠΊΡΠ΅Π·ΠΎΠ»ΠΎΠΌ ΠΏΡΠΎΠΈΡΡ
ΠΎΠ΄ΠΈΡ ΠΎΠ±ΡΠ°ΡΠ΅Π½ΠΈΠ΅ ΠΊΠΎΠ½ΡΠΈΠ³ΡΡΠ°ΡΠΈΠΈ ΠΊΠΎΠ½Π΅ΡΠ½ΠΎΠ³ΠΎ ΠΏΡΠΎΠ΄ΡΠΊΡΠ° Ρ ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ Π² Ρ
ΠΎΠ΄Π΅ ΡΠ΅Π°ΠΊΡΠΈΠΈ [R]-1-(3-Ρ
Π»ΠΎΡ-1-ΡΠ΅Π½ΠΈΠ»ΠΏΡΠΎΠΏΠΎΠΊΡΠΈ)-2-ΠΌΠ΅ΡΠΈΠ»Π±Π΅Π½Π·ΠΎΠ»Π°, ΠΊΠΎΡΠΎΡΡΠΉ Π΄Π°Π»Π΅Π΅ ΠΏΡΠΈ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠ΅ ΠΌΠ΅ΡΠΈΠ»Π°ΠΌΠΈΠ½ΠΎΠΌ ΠΎΠ±ΡΠ°Π·ΡΠ΅Ρ ΠΎΡΠ½ΠΎΠ²Π°Π½ΠΈΠ΅ Π°ΡΠΎΠΌΠΎΠΊΡΠ΅ΡΠΈΠ½Π°, Π²ΡΠ΄Π΅Π»ΡΠ΅ΠΌΠΎΠ΅ ΠΈΠ· ΡΠ°ΡΡΠ²ΠΎΡΠ° Π² Π²ΠΈΠ΄Π΅ ΡΠΎΠ»ΠΈ Ρ Ρ
Π»ΠΎΡΠΈΡΡΠΎΠ²ΠΎΠ΄ΠΎΡΠΎΠ΄Π½ΠΎΠΉ ΠΊΠΈΡΠ»ΠΎΡΠΎΠΉ. Π‘ ΡΠ΅Π»ΡΡ ΠΏΠΎΠΈΡΠΊΠ° Π½ΠΎΠ²ΡΡ
Π±ΠΈΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈ Π°ΠΊΡΠΈΠ²Π½ΡΡ
ΡΠΎΠ΅Π΄ΠΈΠ½Π΅Π½ΠΈΠΉ ΠΏΠΎΠ»ΡΡΠ΅Π½ ΡΡΠ΄ ΡΡΠ»ΡΡΠΎΡ
Π»ΠΎΡΠΈΠ΄ΠΎΠ² Ρ ΠΎΠΊΡΠ°Π·ΠΎΠ»ΡΠ½ΡΠΌΠΈ ΠΈ ΠΈΠ·ΠΎΠΊΡΠ°Π·ΠΎΠ»ΡΠ½ΡΠΌΠΈ Π·Π°ΠΌΠ΅ΡΡΠΈΡΠ΅Π»ΡΠΌΠΈ, ΠΊΠΎΡΠΎΡΡΠ΅ Π΄Π°Π»Π΅Π΅ Π²Π²ΠΎΠ΄ΠΈΠ»ΠΈΡΡ Π² ΡΠ΅Π°ΠΊΡΠΈΡ Ρ Π°ΡΠΎΠΌΠΎΠΊΡΠ΅ΡΠΈΠ½ΠΎΠΌ. ΠΠΎΠ»ΡΡΠ΅Π½Π½ΡΠ΅ Π² ΡΠ°Π±ΠΎΡΠ΅ ΡΡΠ»ΡΡΠΎΠ½Π°ΠΌΠΈΠ΄Ρ ΡΠ΄ΠΎΠ²Π»Π΅ΡΠ²ΠΎΡΡΡΡ ΡΡΠ΅Π±ΠΎΠ²Π°Π½ΠΈΡΠΌ, ΠΏΡΠ΅Π΄ΡΡΠ²Π»ΡΠ΅ΠΌΡΠΌ ΠΊ ΠΌΠΎΠ»Π΅ΠΊΡΠ»Π°ΠΌ β ΠΊΠ°Π½Π΄ΠΈΠ΄Π°ΡΠ°ΠΌ Π΄Π»Ρ Π±ΠΈΠΎΠΌΠ΅Π΄ΠΈΡΠΈΠ½ΡΠΊΠΈΡ
ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ.Π ΠΎΠ·ΡΠΎΠ±Π»Π΅Π½ΠΎ ΠΌΠ΅ΡΠΎΠ΄ ΡΠΈΠ½ΡΠ΅Π·Ρ Π°ΡΠΎΠΌΠΎΠΊΡΠ΅ΡΠΈΠ½Ρ Π· Π²ΠΈΠΊΠΎΡΠΈΡΡΠ°Π½Π½ΡΠΌ ΡΡΠ΅ΡΠ΅ΠΎΡΠΏΠ΅ΡΠΈΡΡΡΠ½ΠΎΠ³ΠΎ ΡΠ΅ΡΠΌΠ΅Π½ΡΠ°ΡΠΈΠ²Π½ΠΎΠ³ΠΎ ΠΊΠ°ΡΠ°Π»ΡΠ·Ρ. ΠΠ°ΡΠ±ΠΎΠ½ΡΠ»ΡΠ½Π° Π³ΡΡΠΏΠ° Π² ΡΡΡΡΠΊΡΡΡΡ 3-Ρ
Π»ΠΎΡΠΎ-1-ΡΠ΅Π½ΡΠ»-ΠΏΡΠΎΠΏΠ°Π½-1-ΠΎΠ½Ρ ΡΠ΅Π³ΡΠΎΡΠΏΠ΅ΡΠΈΡΡΡΠ½ΠΎ Π²ΡΠ΄Π½ΠΎΠ²Π»Π΅Π½Π° Π· Π²ΠΈΠΊΠΎΡΠΈΡΡΠ°Π½Π½ΡΠΌ NADPH-Π·Π°Π»Π΅ΠΆΠ½ΠΎΡ ΠΊΠ°ΡΠ±ΠΎΠ½ΡΠ»ΡΠ΅Π΄ΡΠΊΡΠ°Π·ΠΈ (SSCR) Π² ΡΠΎΡΡΠ°ΡΠ½ΠΎΠΌΡ Π±ΡΡΠ΅ΡΡ. Π ΡΠΌΠΎΠ²Π°Ρ
ΡΠ΅Π°ΠΊΡΡΡ ΠΡΡΡΠ½ΠΎΠ±Ρ Π· ΠΎ-ΠΊΡΠ΅Π·ΠΎΠ»ΠΎΠΌ Π²ΡΠ΄Π±ΡΠ²Π°ΡΡΡΡΡ ΠΎΠ±Π΅ΡΠ½Π΅Π½Π½Ρ ΠΊΠΎΠ½ΡΡΠ³ΡΡΠ°ΡΡΡ ΠΊΡΠ½ΡΠ΅Π²ΠΎΠ³ΠΎ ΠΏΡΠΎΠ΄ΡΠΊΡΡ Π· ΡΡΠ²ΠΎΡΠ΅Π½Π½ΡΠΌ [R]-1-(3-Ρ
Π»ΠΎΡΠΎ-1-ΡΠ΅Π½ΡΠ»ΠΏΡΠΎΠΏΠΎΠΊΡΠΈ)-2-ΠΌΠ΅ΡΠΈΠ»Π±Π΅Π½Π·ΠΎΠ»Ρ, ΡΠΊΠΈΠΉ Π΄Π°Π»Ρ ΠΏΡΠΈ ΠΎΠ±ΡΠΎΠ±ΡΡ ΠΌΠ΅ΡΠΈΠ»Π°ΠΌΡΠ½ΠΎΠΌ ΡΡΠ²ΠΎΡΡΡ ΠΎΡΠ½ΠΎΠ²Ρ Π°ΡΠΎΠΌΠΎΠΊΡΠ΅ΡΠΈΠ½Ρ, ΡΠΊΠ° Π²ΠΈΠ΄ΡΠ»ΡΡΡΡΡΡ Π· ΡΠΎΠ·ΡΠΈΠ½Ρ Ρ Π²ΠΈΠ³Π»ΡΠ΄Ρ ΡΠΎΠ»Ρ Π· Ρ
Π»ΠΎΡΠΈΡΡΠΎΠ²ΠΎΠ΄Π½Π΅Π²ΠΎΡ ΠΊΠΈΡΠ»ΠΎΡΠΎΡ. Π ΠΌΠ΅ΡΠΎΡ ΠΏΠΎΡΡΠΊΡ Π½ΠΎΠ²ΠΈΡ
Π±ΡΠΎΠ»ΠΎΠ³ΡΡΠ½ΠΎ Π°ΠΊΡΠΈΠ²Π½ΠΈΡ
ΡΠΏΠΎΠ»ΡΠΊ ΠΎΡΡΠΈΠΌΠ°Π½ΠΎ ΡΡΠ΄ ΡΡΠ»ΡΡΠΎΡ
Π»ΠΎΡΠΈΠ΄ΡΠ² Π· ΠΎΠΊΡΠ°Π·ΠΎΠ»ΡΠ½ΠΈΠΌΠΈ ΡΠ° ΡΠ·ΠΎΠΊΡΠ°Π·ΠΎΠ»ΡΠ½ΠΈΠΌΠΈ Π·Π°ΠΌΡΡΠ½ΠΈΠΊΠ°ΠΌΠΈ, ΡΠΊΡ Π΄Π°Π»Ρ Π²Π²ΠΎΠ΄ΠΈΠ»ΠΈΡΡ Π² ΡΠ΅Π°ΠΊΡΡΡ Π· Π°ΡΠΎΠΌΠΎΠΊΡΠ΅ΡΠΈΠ½ΠΎΠΌ. ΠΡΡΠΈΠΌΠ°Π½Ρ Π² ΡΠΎΠ±ΠΎΡΡ ΡΡΠ»ΡΡΠΎΠ½Π°ΠΌΡΠ΄ΠΈ Π²ΡΠ΄ΠΏΠΎΠ²ΡΠ΄Π°ΡΡΡ Π²ΠΈΠΌΠΎΠ³Π°ΠΌ, ΡΠΊΡ Π²ΠΈΡΡΠ²Π°ΡΡΡΡΡ Π΄ΠΎ ΠΌΠΎΠ»Π΅ΠΊΡΠ» β ΠΊΠ°Π½Π΄ΠΈΠ΄Π°ΡΡΠ² Π΄Π»Ρ Π±ΡΠΎΠΌΠ΅Π΄ΠΈΡΠ½ΠΈΡ
Π΄ΠΎΡΠ»ΡΠ΄ΠΆΠ΅Π½Ρ
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