Abstract: A preservation method and a preservation holder are capable of preserving a molecular weight marker for use in electrophoresis or a specimen whose molecular weight is to be estimated by electrophoresis at low cost with a hassle-free simple method. In a method for preserving a molecular weight marker or a specimen, a molecular weight marker or a specimen is preserved at normal temperature in a state in which the molecular weight marker or the specimen is held by a base section of a preservation holder in a dried state.
Abstract: There is provided a pipette device capable of adjusting a collection amount in a short time. A pipette device 1 adjusting a volume of a cylinder portion “a” by the axial-direction movement of a plunger 3 caused by the rotation of a push rod 5 includes a speed increasing mechanism 35 provided between a pipette main body 2 and the push rod 5 and increasing a speed of input rotation to transmit the input rotation with the increased speed to the push rod 5.