Abstract: A multi-purpose device, the device including a tube holder for holding tubes; tube driving apparatus for rotating the tubes in the tube holder, the tube holder having spaces for accommodating the tubes such that each one of the tubes can be placed in a separate one of the spaces; the spaces having shapes and sizes providing free rotation of the tubes within the spaces about longitudinal axes of the tubes; the tube driving apparatus having touching engagement with walls of the tubes and pressing the walls of the tubes against the tube holder; and friction between the tube driving apparatus and the walls of the tubes being greater then friction between walls of the tubes and the tube holder.

Abstract: A mixer is intended for mixing substances, resuspending pellets and disintegrating living cells, such as yeast cells. The mixer includes a tube holder and an electric motor with striking attachment(s). The main part of the holder is rigid rings coaxial with and located subsequently along the motor shaft. Each ring has a number of holes the tubes sit in. Diameters of the holes are larger then diameters of the tubes, so that there are gaps between the tubes and the rigid rings. The attachment(s) of the motor is disks with blades, affixed to the motor shaft. When the motor shaft rotates the blades strike against the tubes. Struck tubes are repelled by the rigid ring (due to a gap between the tubes and rings), get a new strike from the blades and so on. As a result, the substance inside the tube receives a turbulent motion which provides mixing, resuspending and disintegrating effects.

Abstract: An auxiliary holder of tubes intended for disintegration of living cells, such as yeast cells, in the presence of glass beads, as well as for mixing substances and pellet resuspension. The holder is installed on a vibrator. Due to specially-made gaps between the tubes and the main parts of the holder the processed cells and substances are subjected to a complex impact of vibration created by the vibrator and shocks created by the holder. The holder strongly enhances the effectiveness of the vibrator. During the disintegrating process the presence of a researcher is not required.