Abstract: The present disclosure relates to a nanoemulsion composition of oxygen gas sustained release and method for preparing the same, and provides a nanoemulsion composition of oxygen gas sustained release and method for preparing the same, including a water phase part containing water, and an oil phase part dispersed in the water phase part and made of nanoparticle containing a perfluorocarbon compound, wherein the oil phase part contains oxygen gas, and the oxygen gas is released in sustained release. According to the present disclosure, there are advantages of preventing hair loss or promoting hair growth by increasing the amount of oxygen gas supplied to the hair bulb and the oxygen release time from the hair bulb.

Abstract: The method comprises registering at least one of an internet protocol (IP) address and a media access control (MAC) address of the security devices, generating a plurality of public key and private key pairs, encrypting and storing private keys comprised in the plurality of public key and private key pairs using a master key provided from a master key management unit, selecting any one of a plurality of public key and private key pairs when the access of the security device is approved and providing a certificate comprising the selected public key to the security device, receiving a symmetric key encrypted with the public key of the certificate from the security device, and decrypting the private key using the master key provided from the master key management unit.

Abstract: The present invention relates to the stabilization of an effective ingredient by using a mineral material. In the present invention, the effective ingredient can be stably supported using the mineral material, and a microcapsule obtained by the manufacturing method according to the present invention, when discharged to nature, causes no environmental problems due to encapsulation ingredients thereof being the same as soil ingredients, and thus can avoid micro-plastic issues.

Abstract: A door videophone capable of rotating a camera, comprising: a main body having a monitor for displaying an image of a caller, and being located indoors; a bell box having the camera for photographing looks of the caller and transmitting the image of the caller to the monitor, and being located outdoors; an actuating device for rotating the camera, and being disposed in the bell box; and a control device for generating an operation control signal associated with the actuating device, and being disposed at the main body.