The invention relates to a straw comprising a tube (11) extending between a first end (13) and a second end (14) and comprising a stopper (12) placed in the tube near the first end thereof and extending between a first end (17) facing the first end of the tube, and a second end (20) facing the second end of the tube, said stopper and said tube being configured such that, after a liquid substance (22) has come in contact with the stopper via the second end thereof, the stopper blocks the passage of the liquid substance therethrough and is, by pushing on the first end thereof, slidable into the tube toward the second end thereof. Moreover, the stopper comprises, on the side of the second end of the tube, a barrier pad (16) consisting of hydrophobic threads over the entire cross-section of the tube.

A living cell cryopreservation tool has a living cell holding member having a body part and a living cell holding part and a tubular accommodation member, closed at one end thereof, which is capable of accommodating the living cell holding member. The living cell holding part has a long and narrow living cell attaching and holding portion. The living cell attaching and holding portion has heat conductors extended in a longitudinal direction thereof and projected from a distal end thereof. The tubular accommodation member has a heat conductive member accommodated inside a distal portion thereof. When the living cell holding member is inserted into the tubular accommodation member from a distal side of each heat conductor thereof, a distal portion of each heat conductor contacts the heat conductive member of the tubular accommodation member.

The present invention relates to a container bag (1) for containing semen for artificial insemination of animals, of the types which are formed by at least two sheets (2.1, 2.2) of sealed thermoplastic material, forming a tubular body (3) with an inner hollow (4) divided by means of a central constriction (5) into first and second contiguous enclosures (7.1, 7.2) communicated by means of a cannula (6) secured in said constriction (5), which bag comprises a closure plug (10) for closing said cannula (6) secured to the bottom (13) of the second enclosure (7.2) of the inner hollow (4), means for securing the cannula (6) to the central constriction (5), and means for securing the closure plug (10) to the bottom (13) of the second enclosure (7.2).

The straw comprises a tube (11) and a gas-permeable liquid-tight stopper (12), which stopper is disposed in the tube closer to one end (16) of the tube than another end (17) of the tube, which tube and which stopper are configured for the stopper to be able to slide in the tube towards the other end (17), said tube being transparent or translucent, said stopper comprising an identifier component (13) configured to emit, when it is illuminated with ultraviolet light, light of which the spectrum comprises at least one peak having a crest of predetermined wavelength in visible light, whereas when it is illuminated by visible light said identifier component does not emit said light of which the spectrum comprises said peak.

A dual-function tower, able to be taken to the canister of cryogenic cylinders for freezing semen, which includes two tubes each with an oblong hollow making up a cavity for easy withdrawal of the pallets. The tubes are assembled together by -turn threads, such as on the cover, which, due to their arrangement, do not cause external bulges adversely affecting the automation of the process and promote perfect alignment of the cavities upon assembly.

The assembly comprises a ramp (4) and a straw transfer device (60) comprising two lateral pads and a straw (1) collector arranged between the two lateral pads, the freezer ramp (4) and the transfer device (60) being configured to allow a first end position, to allow a second end position, and such that, by sliding the transfer device (60) from the first end position to the second end position with the pads that slide on angled sections (19) of the ramp (4), the plurality of straws (1) initially arranged on the ramp (4) is recovered in the collector of the transfer device (60).