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Storage of Uncatalogued Tissues

MVZ Handbook > MVZ Tissue Guidelines
Storage of FROZEN Uncatalogued Tissues in MVZ:
Frozen research material not ready to catalog

This material should be stored either in the working lab chest freezer (Room 4141, short-term only) or in chest freezer # 11 (Room 4123, longer-term). Samples in the short-term chest freezer can be stored either in small cardboard/plastic boxes or in larger metal boxes (available in Room 4123A).

The longer-term freezer is outfitted with a system of vertical racks and polycarbonate boxes. The freezer door has a map with the layout – choose a rack (alone or shared with others) and mark your place on the map. Boxes (81 place or grid-less) are available in a cabinet in Room 4123A; these boxes should be used ONLY for freezer storage while at MVZ, i.e., they are not to be taken when people (grad students, postdocs, etc.) leave.

All boxes, regardless of where they are stored, should be labeled with the person’s name and nature of material.

Do not dump tissues in a bag or box on top of the racks in the freezer!

Frozen tissues ready for cataloguing

Tissues that are ready to catalog should be stored in chest freezer # 1 in Room 4123. This freezer is outfitted with a system of vertical racks and polycarbonate boxes. A map with the layout of the freezer is on the wall to the right.

Boxes (81 place or grid-less) are available in a cabinet in Room 4123A. All boxes should be labeled with the accession number and/or responsible person and nature of the material, e.g., Conroy, San Bernardino Mts., April 2002; gift from Lassen National Park, 2002; etc.

Do not dump tissues in a bag or box on top of the racks in the freezer!

Frozen samples that are preserved on behalf of another MVZ researcher

Occasionally, someone will preserve tissues on behalf of another researcher. Tissues that are assigned that researcher’s collector number should be put either in an appropriate box for cataloguing, or in a box with other tissues collected by that researcher. If such tissue is part of an accession that has not yet been catalogued, it should be placed with the other material of the same accession. Such samples should not be mixed with tissues from the person who did the preservation.


Storage of NON-FROZEN uncatalogued tissues in MVZ:
Non-frozen research material not ready to catalog

These tissues can be stored either in the walk-in cold room in MVZ or the walk-in cold room/freezer on the 4th floor, or can be kept by the collector. If boxes are stored in general-use areas, they should be labeled with the collector’s name and nature of material.

Tissues should NOT be stored in cardboard boxes in cold rooms (freezers are OK) because they attract mold!

Non-frozen tissues ready to catalog

Non-frozen tissues that are ready for cataloguing should be stored in the walk-in cold room in MVZ. Polycarbonate boxes (100 place) or larger metal boxes are available for this purpose.

Smaller boxes should be placed inside racks set aside for uncatalogued tissues. Each collection – Herps, Mammals – has a separate rack for uncatalogued tissues; currently, there is no bird non-frozen collection. All boxes should be labeled with the accession number and/or responsible person and nature of material.

Tissues should NOT be stored in cardboard boxes in cold rooms (freezers are OK) because they attract mold!

Non-frozen samples that are preserved on behalf of another MVZ researcher

Non-frozen tissues that are preserved on behalf of another researcher, and assigned that researcher’s collector number, should be stored using the same procedure as for frozen tissues (see above).


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