Different from ordinary hydrothermal route, shuttle-like nano-β-FeOOH could be obtained through using the mixed solvent of acetone and water, while only spherical nanoparticles can be achieved by the aqueous solvent.

Orthorhombic phase single-crystalline cerium hydroxide carbonate (Ce(OH)CO_3) with shuttle morphology have been successfully synthesized by the hydrothermal method at 120℃ using Ce(NO_3)_3·6H_2O as the cerium source,aqueous carbamide as both an alkaline and carbon source and polyvinyl alcohol (PVA) as the surfactant.

Corrugated oblong copper waveguide(hereafter called oblong waveguide for short) is a kind of good feeder,therefore its features,analysis,and design method,as well as the comparison between it and common used elliptical waveguide and cocoon-section waveguides are introduced.