The dependence of the electrical characteristics of hydrothermally crystallized pure-silica–zeolite films on the water concentration in the precursor was investigated. Zeolite was crystallized in a silica–zeolite composite film after spin-coating the precursor, which was composed of tetraethylorthosilicate, tetrabutylammonium hydroxide, ethylalcohol, and deionized (DI) water, followed by calcinations at 400 °C. The results of Fourier-transform infrared (FT-IR) spectroscopy indicated that the number of Si–OH and O–H bonds decreased with an increase in the water concentration in the precursor. The dielectric constant of the film decreased with an increase in water concentration, while the leakage current increased.
Mycotic celiac artery aneurysm following infective endocarditis is extremely rare and, to our knowledge, only four cases have been reported in the literature to date. We describe the case of a 60 year-old man who developed a mycotic aneurysm of the celiac artery, which was detected by computed tomography (CT) following an episode of infective endocarditis. He successfully underwent endovascular isolation and packing of the aneurysm using N-butyl cyanoacrylate (NBCA) with embolization coils.
We fabricated a biosensor based on a silicon nanowire field-effect transistor (SiNW FET) with a Si 3 N 4 gate insulator for highly sensitive detection of target biomolecules. The fabricated SiNW FET acted as an ion-sensitive FET that could detect the charge density in solutions flowing along the gate surface by responding to the pH of the solutions. The SiNW FET also detected charged protein molecules in solution, suggesting that our device can be used in highly sensitive, label-free biosensing.
We examine charged static perfect fluid distributions with a dilaton field in the framework of general relativity. We consider the case when the Einstein equations reduce to a nonlinear version of the Poisson equation. We show that the Maxwell equation and an equation for a dilaton imply the relation among the charge, mass, and dilatonic charge densities.
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