2-(4-tert-Butyl­phen­yl)-5-{3,4-dibutoxy-5-[5-(4-tert-butyl­phen­yl)-1,3,4-oxadiazol-2-yl]-2-thienyl}-1,3,4-oxadiazole

In the title compound, C36H44N4O4S, the dihedral angles between the central thio­phene ring and the pendent oxadiazole rings are 12.7 (2) and 13.7 (2)°, and the dihedral angles between the oxadiazole rings and their adjacent benzene rings are 6.1 (2) and 17.5 (2)°. An intra­molecular C—H⋯O inter­action may help to establish the conformation

Ethyl 2-(2-hy­droxy-5-nitro­phen­yl)acetate

In the crystal structure of the title compound, C10H11NO5, inter­molecular O—H⋯O hydrogen bonds link the mol­ecules into chains along the b-axis direction. Weak C—H.·O hydrogen bonds also occur

3-[4-(Trifluoro­meth­yl)phen­yl]propanoic acid

In crystal of the the title compound, C10H9F3O2, inversion dimers linked by pairs of O—H⋯O hydrogen bonds occur

4-Bromo-2-[1-(4-eth­oxy­phen­yl)-1-methyl­eth­yl]-1-methyl­benzene

In title compound, C18H21BrO, the dihedral angle between two rings is 85.72°. No classical hydrogen bonds are found and only van der Waals forces stabilize the crystal packing

Ethyl 5-methyl­imidazo[1,2-a]pyridine-2-carboxyl­ate

The title compound, C11H12N2O2, was synthesized from the reaction of 6-methyl­pyridin-2-amine and ethyl 3-bromo-2-oxopropionate. In the mol­ecular structure, the six- and five-membered rings are individually almost planar with r.m.s. deviations of 0.003 and 0.002 Å, respectively. The two rings are almost coplanar, the dihedral angle between their planes being 1.4 (3)°. Inter­molecular C—H⋯O and C—H⋯N hydrogen bonds are present in the crystal structure

Photonic Localization of Interface Modes at the Boundary between Metal and Fibonacci Quasi-Periodic Structure

We investigated on the interface modes in a heterostructure consisting of a semi-infinite metallic layer and a semi-infinite Fibonacci quasi-periodic structure. Various properties of the interface modes, such as their spatial localizations, self-similarities, and multifractal properties are studied. The interface modes decay exponentially in different ways and the modes in the lower stable gap possess highest spatial localization. A localization index is introduced to understand the localization properties of the interface modes. We found that the localization index of the interface modes in the upper stable gap will converge to two slightly different constants according to the parity of the Fibonacci generation. In addition, the localization-delocalization transition is also found in the interface modes of the transient gap.Comment: 20 pages, 5figure

シベリア亜寒帯林における樹冠と林床の植生指数

Clinical characteristic of patients with rheumatoid arthritis (RA) and trauma. (DOC 45 kb