Abstract:
The present invention relates to a method for preparing anatase-type titanium dioxide (TiO2) nanoparticles, the method comprising the steps of: uniformly mixing titanium n-butoxide and cetyltrimethyl ammonium salt (CTAS) in water; subjecting the mixture to hydrothermal treatment at a temperature of 60˜120° C.; and collecting anatase-type titanium dioxide nanoparticles produced by the hydrothermal treatment and drying the collected nanoparticles. According to the present invention, anatase-type titanium dioxide nanoparticles having excellent crystallinity can be easily prepared in large amounts by a simple process without needing heat treatment.
Abstract:
An isolated solely pollen-specific promoter derived from Arabidopsis comprise a nucleotide sequence of Arabidopsis PLA2-δ gene. The novel promoter has specific roles in particular organs and at particular developmental stages, such as in mature flowers, and can be used in the production of hybrid seeds using male sterility techniques.
Abstract:
Disclosed is an origami sheet for making a regular hexahedron box, including: first to fourth main outer wall sections connected successively along a longitudinal central area to be foldable with regard to one another; and first to fourth wing sections connected to both longitudinal sides of the first to fourth main outer wall sections to be foldable, respectively. The first and second wing sections and the third and fourth wing sections are connected to be foldable with regard to each other, and the second and third wing sections abut each other with interposed incision lines.