A new and distinct Portulaca cultivar named \u2018DPAZ17\u2019 is disclosed, characterized by large white flowers. Several cloned cell lines stably expressing these ribozymes were established. The first part includes a shaft connected to the motor, and two nuts disposed around the shaft that have screw threads in opposite directions and move along the shaft in response to operation of the motor. In one aspect, the apparatus further comprises a biasing member disposed adjacent the sleeve and adapted to apply a force against the sleeve in an axial direction and further comprises a piston adapted to receive a hydraulic pressure to move the sleeve against the force of the biasing member. The detection unit 320 is supported by a second substrate 340 that is parallel to the first substrate 330, and arranged at the position corresponding to the detection unit 310 supported by the first substrate 330.