Abstract: The present invention provides an apparatus for applying electrical stimulation to cells in a liquid culture medium without using electrodes immersed in the liquid culture medium. This apparatus is an electrical stimulation apparatus A for electrically stimulating cells in a liquid culture medium (2). A liquid culture medium vessel (3) includes: a ring-shaped recess (7) for holding the liquid culture medium (2); and a through hole (6) formed within the ring-shaped recess (7). A magnetic core (1) is made of a magnetic material and disposed such that a portion thereof is inserted through the through hole (6) of the liquid culture medium vessel (3). An excitation coil (5) is wound around the magnetic core (1). A coil power supply (8) supplies a varying current to the excitation coil (5).

Abstract: A smaller-sized, more lightweight, and power-saving successive magnetic pulse device is provided. A discharging circuit section K is configured by connecting, in series in a loop, a magnetic therapy pulse coil 6 configured to generate an eddy current in a target part 3, a charging/discharging capacitor 4, and a switching semiconductor element 7 configured to supply a discharge current from the charging/discharging capacitor 4 to the pulse coil 6. A step-up transformer 1 includes a primary-side coil 1a connected to an AC power supply 2 and a secondary-side coil 1b connected to input terminals 5a of a full-wave rectifying circuit 5. A control unit 8 is connected to a switching semiconductor element 7 and controls conduction timing of the switching semiconductor element 7. The full-wave rectifying circuit 5 has output terminals 5b connected to both terminals P1 and P2 of the charging/discharging capacitor 4, respectively.