L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des

Ortomedic

Francois Colomb

Nicole Angelier

James E Nordman

Bernard Manhes

Jean-Pierre Barral

Philippe Cardinne

Bernard Million

Raymond Serve

Remote temperature and/or temperature difference measuring device

The invention relates to the freezing of biological products contained in straws and more particularly to the initiation of the crystallization phase. A series of straws is disposed in such manner that the straws are arranged in parallel side-by-side relation and a crystallization bar (10) is mounted by springs (20) on two arms (11 and 12) connected to a rotary shaft (13). The arms shift the bar between a waiting position in a receiver-cradle (16) which is deeply cooled by a pipe (17-18) and an operative position in which is bears against the straws. Application in the freezing of blood cells, human and animal sperm, fragments of biological tissues and embryos, etc.

Device for freezing biological products contained in straws

A freezing device for biological products comprises an impeller arranged at the top of a sleeve located above a basin of liquid nitrogen. The impeller causes a rising flow of nitrogen vapors within the sleeve and a descending flow outside it, the impeller and sleeve being arranged within a casing. When cooling is completed, the sleeve is lowered into the basin of liquid nitrogen. The invention is applied to the freezing of biological products stored in tubes, ampoules, phials, or straws arranged at the base of the sleeve.

Device for freezing biological products

A Josephson junction comprises a cylindrical substrate having a flat end face disposed in a plane perpendicular to the axis of the cylinder. At least two bodies of superconducting material such as niobium, tantalum or vanadium are carried by the substrate and have boundary surfaces disposed in that plane. Insulating material and semiconductor material spaces apart the superconductors; and electrical supply means extend lengthwise of the cylinder to bring electric current to that plane. In one embodiment, the superconductors are disposed on opposite sides of the plane; while in another embodiment, they are all disposed on the same side of the plane.

Josephson junction

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Grenoble, France

Francois Colomb