In the title compound, C(18)H(21)NO(3), which belongs to the family of calcium channel blockers, the dihydropyridine ring assumes a flattened boat conformation. The two carbonyl units adopt a synperiplanar conformation with respect to the double bonds in the dihydro-pyridine ring. The methoxy-phenyl ring is almost perpendicular to the prydine ring [dihedral angle = 89.01 (7)°]. In the crystal, ...

The equilibrium geometries, electronic and vibrational properties, and static polarizability of B24, B24 , and B24 clusters are reported here. First-principles calculations based on density functional theory predict the staggered double-ring configuration to be the ground state for B24, B24 , and B24 , in contrast to the quasi-planar structure observed in small neutral and ionized Bn clusters w...

Specificities of three monoclonal antibodies (15-I-C5, DBPA 1, and MAC 62) raised against the plant hormone (S)-(+)-abscisic acid (ABA) have been compared. Immunological cross-reactivities against fifteen biologically active analogs of ABA were measured. The ABA analogs were altered at one or more of four positions: the double bonds in the ring, at C-2 C-3 and at C-4 C-5, and in the oxidation l...

Tris paper, through analy3is to the specific power of the compressor, indicates that to reduce the power loss caused by friction is an important way to reduce the specific power of the compressor, investigates the realizability employing a single piston ring or a piston ring with small elasticity in the high speed double acting compressor, and raises a standpoint for a high speed double acting ...

Zeolites with extra-large pores have attracted great attention because of their important applications such as in hydrocracking, catalysis, and separation of large molecules. Despite much progress has been made during the past decades, the synthesis of these materials remains a big challenge. A new extra-large-pore zeolite NUD-1 (Nanjing University Du's group zeolite no. 1) is synthesized by us...

Multi-level networks have been a good solution in large scale networks scenarios. The implementation of a network into different levels or sub-layers, improves the performance and reduces the investment against plain topologies. This paper tries to characterize important parameters on multi-level networks such as diameter, average distance and gateway location so that to be able to optimize the...

2-Guanidinobenzimidazole condenses with benzaldehyde in the presence of hydro-chloric acid to form 2-amino-3,4-dihydro-4-phenyl-1,3,5-triazino[1,2-a]benzimidazole, which was isolated as its hydro-chloride, C(15)H(14)N(5) (+)·Cl(-). The positive charge of the cation is formally placed on the double-bonded N atom of the dihydro-triazine ring. The six-membered dihydro-triazine that is fused with t...

The magnetic states and switching processes are investigated in Co and NiFe rings with lateral dimensions from the micrometer range down to sub-100 nm: Using non-intrusive imaging techniques we have directly observed the nanoscopic details of the magnetization configurations of epitaxial and polycrystalline mesoscopic ring structures with o15 nm resolution. We have found head-to-head domain wal...

carnation (dianthus caryophyllus) can be infected by several viruses that some are specific to carnation flowers. vegetative propagation of carnation, can easily disperse viruses by infectied cuttings. during the year 2007, viral-like symptoms were observed on carnation in mahallat greenhouses. 142 suspected samples from glass houses, with symptoms of reddish- purple flecks and spots on leaves,...

Formation of the Drosophila cellular blastoderm involves both membrane invagination and cytoskeletal regulation. Mutations in src64 and tec29 reveal a novel role for these genes in controlling contraction of the actin-myosin microfilament ring during this process. Although membrane invagination still proceeds in mutant embryos, its depth is not uniform, and basal closure of the cells does not o...