2,772 research outputs found
4-(4-ChloroÂphenÂyl)-3-cyano-7-(4-methÂoxyÂphenÂyl)-5-oxo-5,6,7,8-tetraÂhydro-4H-chromen-2-aminium methanoÂlate
In the cation of the title organic ion pair compound, C23H20ClN2O3
+·CH3O−, the cycloÂhexyl ring shows a half-boat conformation and the dihedral angles between two benzene rings and the pyran ring are 83.14 (7) and 73.18 (9)°. In the crystal, centrosymmetrically related cations are linked into a dimer by pairs of N—H⋯N hydrogen bonds, generating an R
2
2(12) ring motif. The anion interÂacts with the dimer through an N—H⋯O hydrogen bond. π–π interÂactions between pyran rings of adjacent dimers, with a centroid–centroid distance of 3.861 (2) Å, are also observed
Alimentary canal of the lesser house fly, Fannia canicularis (Linnaeus) (Diptera: Fanniidae)
The alimentary canal of Fannia canicularis was studied intensively for the first time, highlighting the description of morphological characteristics and providing detailed morphometric data. Two pairs of Malpighian tubules with considerably different length were found which has been rarely documented for Calyptratae flies before. Furthermore, stout cardia and sinewy crop of the samples were ob- served and supposed to be responsible for the energy needed to support the long- time swarming behavior of the species
Effects of losses in the hybrid atom-light interferometer
Enhanced Raman scattering can be obtained by injecting a seeded light field
which is correlated with the initially prepared collective atomic excitation.
This Raman amplification process can be used to realize atom-light hybrid
interferometer. We numerically calculate the phase sensitivities and the
signal-to-noise ratios of this interferometer with the method of homodyne
detection and intensity detection, and give their differences between this two
methods. In the presence of loss of light field and atomic decoherence the
measure precision will be reduced which can be explained by the break of the
intermode decorrelation conditions of output modesComment: 9 pages, 7 figure
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