Abstract: A plasma generating apparatus includes peripheral dielectric tubes arranged at regular intervals around a circumference having a constant radius from the center of top surface of a chamber, peripheral antennas disposed to cover the peripheral dielectric tubes, upper magnets vertically spaced apart from the peripheral dielectric tubes to be disposed on the same first plane, and lower magnets each being disposed on the same second plane between the upper magnets and the peripheral dielectric tubes. A central axis of the upper magnets and a central axis of the lower magnets match each other, and plasma is generated inside the peripheral dielectric tubes.

Abstract: There is provided an antibiotic composition including Eisenia bicyclis-derived phlorotannin compound, in which the antibiotic composition includes a phlorotannin compound selected from 7-phloroeckol, fucofuroeckol-A, and dioxinodehydroeckol, or mixture thereof, which are derived from Eisenia bicyclis, as an effective component. The compounds described above exhibit an antibiotic activity against an antibiotic-resistant bacterium. In addition, the compound described above can exhibit a synergetic effect by using in combination with ?-lactam-based antibiotic composition by recovering an antibiotic activity of ?-lactam-based antibiotic, such as ampicillin, penicillin, and oxacillin against MRSA.