Abstract: The present application relates to a system for removal of nitrate from water. The system includes a first reactor comprising a porous oxide-derived silver electrode (OD-Ag) for electrocatalytic reduction of nitrate (NO3?) to nitrite (NO2?) and a second reactor comprising a Pd-based catalyst for catalytic reduction of nitrite (NO2?). Also disclosed is a method of removing nitrate from water.

Abstract: The present invention provides a silica aerogel powder, a preparation method and an application thereof, and belongs to the field of preparation of insulating materials. The silica aerogel powder provided by the present invention is prepared from the following components: 100 to 300 parts by weight of aqueous solution of silica source, 200 to 400 parts by weight of oil phase solvent, 4 to 40 parts by weight of cosolvent, 0.2 to 2 parts by weight of surfactant, 10 to 60 parts by weight of sodium methylsiliconate solution, 1 to 5 parts by weight of aqueous inorganic acid solution, 3 to 10 parts by weight of sodium trimethylsilanolate solution in tetrahydrofuran (THF), and 0.3 to 0.9 part by weight of organic fatty acid in petroleum ether. The silica aerogel powder provided by the present invention is structurally uniform and features good hydrophobicity, low thermal conductivity, and low density.

Abstract: Disclosed are benzoheterocyclic alkylamine compounds, or a pharmaceutically acceptable salt thereof, or a stereoisomer thereof, and a preparation method thereof, and use of the same in the manufacture of an antibacterial drug as an inhibitor of staphyloxanthin synthesis in Staphylococcus aureus.

Abstract: Disclosed are benzoheterocyclic alkylamine compounds, or a pharmaceutically acceptable salt thereof, or a stereoisomer thereof, and a preparation method thereof, and use of the same in the manufacture of an antibacterial drug as an inhibitor of staphyloxanthin synthesis in Staphylococcus aureus.