In a series of Hofmann-like spin crossover complexes, two new compounds, {Fe(3-F-4-Methyl-py)2[Au(CN)2]2} (1) and {Fe(3-Methyl-py)2[Au(CN)2]2} (2) (py = pyridine) are described. The series maintains a uniform 2-dimentional (2-D) layer structure of {Fe[Au(CN)2]2}. The layers are combined with another layer by strong aurophilic interactions, which results in a bilayer structure. Both coordination...

In tracking systems using phased array antenna, the adaptive-gain CX-P tracker combined with circular prediction has been proposed for maneuvering targets. However, tracking quality of the circular prediction filter degrades for highly maneuvering targets that continue to change the turning plane, since the circular prediction is calculated on the assumption that a target flies on the same plan...

A novel homocyclotirucallane, sinetirucallol (1), and two additional new dihydrophenanthrenes, sinensols G (2) and H (3), were isolated from the aerial parts of Spiranthes sinensis (Pers.) Ames. Their structures were determined by various spectral analyses, including MS and two-dimentional nuclear magnetic resonance techniques. The structure of compound 1 was further confirmed by single-crystal...

Structure-controlled Pt-based catalysts have been known to exhibit improved electrocatalytic activities due to particularly modulated surface structures favorable for alcohol electrooxidation. We report PtNi alloy dendrite structure for formic acid electrooxidation prepared by a thermal decomposition method. The Pt-Ni nanodendrites display 3-dimentional nanostructure and homogeneous alloy forma...

In the title mol-ecule, C(9)H(10)BrN(3)O(2)S, the thia-zine ring has an envelope conformation with the S atom at the flap. The geometry around the S atom is distorted tetra-hedral. In the crystal, inversion dimers linked by pairs of N-H⋯N hydrogen bonds occur, generating R(2) (2)(6) ring motifs. N-H⋯O hydrogen bonds and C-H⋯O inter-actions connect the dimers, forming a three-dimentional network...

Background: The removable dentures or fixed can be used as a replacement for missing teeth and restore the aesthetics functional condition of patien. Dentures with good adaptation obtained from accurate impressions. Dimensional accuracy adequate mechanical properties are one main requirements working model making materials. addition sodium borate help gypsum type III achieve balance dimentional...

Rail irregularity is one of the most effective factors in train derailment. theste irregularities have generally random distribution that are assumed to be stationary random and ergodic processes in space, with Gaussian amplitude probabiliy densities and zero mean values. The quality of irregularities, their distribution along the rails and wagon speed are the main factors for train derailment ...