382 research outputs found
Ethyl 4-{2,6-dichloro-4-[3-(2,6-difluorobenzoyl)ureido]phenoxy}butanoate
The title compound, C20H18Cl2F2N2O5, is considered to belong to the fourth generation of insecticides with properties such as high selectivity, low acute toxicity for mammals and high biological activity. An intramolecular N—H⋯O hydrogen bond results in the formation of a six-membered ring. In the crystal structure, intermolecular N—H⋯O and C—H⋯F hydrogen bonds link the molecules
Construction of orthonormal wavelet-like bases
A general method for constructing wavelet-like bases in a Hilbert space H starting from any orthonormal basis in H and any periodic orthonormal wavelet basis is presented. With this method we can take advantage of the characteristics of both types of bases to obtain orthonormal wavelet-like bases that are suitable to represent functions and operators efficiently.Fil: Morillas, Patricia Mariela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Matemática Aplicada de San Luis; Argentina. Universidad Nacional de San Luis; Argentin
The in vivo Therapeutic Effect of Free Wanderer Powder (逍 遙 散 xiāo yáo sǎn, Xiaoyaosan) on Mice with 4T1 Cell Induced Breast Cancer Model
ABSTRACTIn the present study, we investigated the therapeutic effect of a classical TCM formula, Free Wanderer Powder (逍遙散 xiāo yáo sǎn), in a breast cancer mouse model induced with estrogen-insensitive breast cancer 4T1 cells. Ovariectomized Balb/c mice (6-8 weeks) or sham mice were injected into the fourth mammary fat pad with 4T1 cells in which tumors were palpable 7days after injection. On the eighth day, the mice were divided into 4 groups and tubefed daily with vehicle, Free Wanderer Powder (逍遙散 xiāo yáo sǎn) formula or tamoxifen for 28days. Tumor growth inhibition and the decrease of the average tumor mass were most evident in mice treated with Free Wanderer Powder (逍遙散 xiāo yáo sǎn). Free Wanderer Powder (逍遙散 xiāo yáo sǎn) treatment significantly reduced Bcl-2 and elevated Bax and p53 protein expressions in breast cancer tumor. These results were further confirmed by immunohistochemisty. Tamoxifen could decrease spleen mass and Bcl-2 protein expression, increase the Bax protein expression as well as exert uterotrophic effects by increasing uterus index and inducing the gene expressions in the uterus. Taken together, these results show that Free Wanderer Powder (逍遙散 xiāo yáo sǎn) treatment induced apoptosis at protein level and inhibited the tumor growth in 4T1-induced ovariectomized Balb/c female mice, indicating the possibility of its future use for treatment of estrogen-insensitive breast caner
Spin Degree of Freedom in a Two-Dimensional Electron Liquid
We have investigated correlation between spin polarization and
magnetotransport in a high mobility silicon inversion layer which shows the
metal-insulator transition. Increase in the resistivity in a parallel magnetic
field reaches saturation at the critical field for the full polarization
evaluated from an analysis of low-field Shubnikov-de Haas oscillations. By
rotating the sample at various total strength of the magnetic field, we found
that the normal component of the magnetic field at minima in the diagonal
resistivity increases linearly with the concentration of ``spin-up'' electrons.Comment: 4 pages, RevTeX, 6 eps-figures, to appear in PR
Entanglement Dynamics in Anti--Symmetric Systems
In the past years, many efforts have been made to study various noteworthy
phenomena in both parity-time () and anti-parity-time
() symmetric systems. However, entanglement dynamics in
-symmetric systems has not previously been investigated in both
theory and experiments. Here, we investigate the entanglement evolution of two
qubits in an -symmetric system. In the -symmetric
unbroken regime, our theoretical simulations demonstrate the periodic
oscillations of entanglement when each qubit evolves identically, while the
nonperiodic oscillations of entanglement when each qubit evolves differently.
In particular, when each qubit evolves near the exceptional point in the
-symmetric unbroken regime, there exist entanglement sudden
vanishing and revival. Moreover, our simulations demonstrate rapid decay and
delayed death of entanglement provided one qubit evolves in the
-symmetric broken regime. In this work, we also perform an
experiment with a linear optical setup. The experimental results agree well
with our theoretical simulation results. Our findings reveal novel phenomena of
entanglement evolution in the -symmetric system and opens a new
direction for future studies on the dynamics of quantum entanglement in
multiqubit -symmetric systems or other non-Hermitian quantum
systems.Comment: 13 pages, 8 figure
Bis(3-aminophenyl) sulfone acetonitrile solvate
In the sulfone molecule of the title compound, C12H12N2O2S·C2H3N, the two benzene rings are oriented at a dihedral angle of 80.69 (3)°. Weak intramolecular C—H⋯O hydrogen bonds result in the formation of two five-membered rings, which both have envelope conformations. In the crystal structure, intermolecular N—H⋯O hydrogen bonds link the molecules
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