Abstract: An actuator includes a housing, a gear part rotatably provided on the housing, a rod having a contact protrusion and configured to be movable upward or downward relative to the housing depending on a rotation of the gear part, and a switch provided in the housing and configured to define an electric circuit electrically connected to a switch resistor, the switch being configured to connect or disconnect (ON/OFF) the electric circuit depending on contact of the contact protrusion, the switch including a safety switch driving section in which a state in which a movement of the contact protrusion relative to the switch is allowed and the electric circuit is connected (ON) is maintained, and the switch and the contact protrusion positioned adjacent to each other so that the movement of the contact protrusion relative to the switch is performed in the safety switch driving section, thereby improving stability and reliability.

Abstract: The present invention relates to a sample plate for matrix-assisted laser desorption ionization (MALDI) mass spectrometry having a stable glyco-affinity layer of a carboxyalkyl boronic acid or carboxyaryl boronic acid and a preparation method of the sample plate. The sample plate shows excellent selectivity for glycoprotein, and can be easily and cost effectively prepared. The sample plate is useful for glycoprotein analysis by MALDI mass spectrometry.

Abstract: The present invention relates to a sample plate for matrix-assisted laser desorption ionization (MALDI) mass spectrometry having a stable glyco-affinity layer of a carboxyalkyl boronic acid or carboxyaryl boronic acid and a preparation method of the sample plate. The sample plate shows excellent selectivity for glycoprotein, and can be easily and cost effectively prepared. The sample plate is useful for glycoprotein analysis by MALDI mass spectrometry.