Dry preparation
A dry preparation is a preparation made by drying .
properties
Dry preparations are often used as demonstration objects of an organism or parts of an organism (e.g. individual organs ) for research and teaching in the field of medicine and biology . Dry specimens are particularly suitable for display collections and teaching purposes, as they are quite durable and allow direct viewing of anatomical structures.
Dry preparations are made by removing water from the tissue , sometimes also by freeze-drying . It is also possible to produce histological dry specimens (e.g. from blood ). Probably the best known method for the production of dry preparations is mummification . In addition to mummification and sokushinbutsu , there are other methods available for making dry preparations. In particular, in order to minimize the defects due to shrinkage by dehydration, which engage Präparatoren on methods such as impregnation or the perfusion with paraffin - or PEG back -containing solutions. Since some dry preparations do not fixate , such dry preparations are susceptible to autolysis . In addition, dry preparations - like many preparations - are susceptible to attack by mold and other pests, depending on the environmental conditions .
literature
- Rudolf Piechocki , Hans-Jürgen Altner: Macroscopic preparation technique, part 1: vertebrates. Gustav Fischer Verlag, Jena 1998, ISBN 3-437-35190-7 -.
- Christoph Zink, Willibald Pschyrembel , Otto Dornblüth : Pschyrembel Clinical Dictionary. 255th edition. Walter de Gruyter, 1986, ISBN 3-11-007916-X .
Individual evidence
- ^ Gudrun Lang: Histotechnology. Springer-Verlag, 2013, ISBN 978-3-7091-1190-1 . Chapter 5: Fixation.
- ↑ Thomas Gütebier: Mold in Natural History Museums? Help! In: The taxidermist. Association of German Taxidermists , Edition 58 (2012), ISSN 0032-6542 , pp. 6–28.
- ↑ M. Troxler, U. Schneppat: Skin Conservation - Handbook for the zoological preparatory. Natural History Museum d. Burgergemeinde Bern, 2003, ISBN 3-907088-17-4 .