Abstract: A motherboard with shockproof, shakeproof and waterproof functions is installed in a cabinet of an electronic device, the motherboard includes a PCB board, wherein front surface of the PCB board is provided with a plurality of structural members, a camera seat unit, an audio seat unit, a functional seat unit, a holder seat and a battery seat with shockproof and shakeproof functions; wherein each of the structural members is dispersedly fixed on a side of the PCB board, wherein the structural member screws and fixes the PCB board inside the cabinet, and wherein each of the seats and the PCB board are coated with waterproof coating.

Abstract: Copolymers including at least one optionally substituted 2-hydroxy-5-sulfonic aniline as a first constituent unit and at least one optionally substituted phenylenediamine as a second constituent unit are disclosed. Compositions containing the copolymers, and methods of making the copolymers are also disclosed. The compositions can also contain for example an ethylene-vinyl acetate copolymer (EVA) and/or electrical conducting additives. The compositions can, for example, be used for detecting lead ions in a sample.

Abstract: Copolymers including at least one optionally substituted 2-hydroxy-5-sulfonic aniline as a first constituent unit and at least one optionally substituted phenylenediamine as a second constituent unit are disclosed. Compositions containing the copolymers, and methods of making the copolymers are also disclosed. The compositions can also contain for example an ethylene-vinyl acetate copolymer (EVA) and/or electrical conducting additives. The compositions can, for example, be used for detecting lead ions in a sample.