Abstract: The present disclosure discloses a film-sticking box for an electronic device, including a box body. A receiving slot for receiving an electronic device and a film-sticking assembly is defined in the box body, and a shape of the receiving slot is adapted to a shape of the electronic device; the box body is connected to an enclosing shell which includes a bottom plate fixedly connected to a bottom of the box body and a cover plate reversibly connected to the bottom plate. During the film-sticking process, the cover plate covers on the box body; in detail, the bottom plate is connected to a connecting plate, and the cover plate is reversibly connected to the bottom plate through the connecting plate. The positioning box is mounted around the enclosing shell to secure the position of the cover plate, such that the cover plate cannot be opened.

Abstract: A polymyxin B component or salts thereof, and a preparation and application thereof. The polymyxin B component includes six ?,?-diaminobutyric acids respectively at positions 1, 3-5 and 8-9, two threonine residues at positions 2 and 10, a phenylalanine residue at position 6 and a leucine residue at position 7 linked in sequence. The threonine residue at position 10 is linked to the ?,?-diaminobutyric acid at position 4 by an amido bond, and the ?,?-diaminobutyric acid at position 1 is linked to 6-methyloctyl-2-enoyl.

Abstract: A polymyxin B component or salts thereof, and a preparation and application thereof. The polymyxin B component includes six ?,?-diaminobutyric acids respectively at positions 1, 3-5 and 8-9, two threonine residues at positions 2 and 10, a phenylalanine residue at position 6 and a leucine residue at position 7 linked in sequence. The threonine residue at position 10 is linked to the ?,?-diaminobutyric acid at position 4 by an amido bond, and the ?,?-diaminobutyric acid at position 1 is linked to 6-methyloctyl-2-enoyl.