Biological material embedded in hydrogels, a process for the...

A - Human Necessities – 01 – H

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A01H 4/00 (2006.01) A01N 3/00 (2006.01) C05G 3/00 (2006.01) C12N 11/04 (2006.01)

Patent

CA 2262556

The invention concerns a fully biodegradable hydrogel consisting of urea group- containing polyester polyurethane polyurea and polysaccharides and/or their derivatives, the hydrogel containing a divisible plant material. The invention further concerns a process for embedding the biological material and for producing and shaping the hydrogels from aqueous solutions. The hydrogels according to the invention can be used as enveloping materials for embedding divisible biological material, in particular plant material, preferably plant cells, protoplasts, plant tissue and plant organs, and zygotic or somatic plant embryos under sterile conditions in order to protect the material during storage, transportation and handling. The hydrogels according to the invention can also contain further additives, such as plant-protecting substances or nutrients. The embedded biological plant material according to the invention can be used as artificial seed.

L'invention concerne un hydrogel totalement biodégradable, constitué de polyurée de polyester polyuréthanne contenant des groupes urée, ainsi que de polysaccharides et/ou leurs dérivés, ledit hydrogel contenant une substance végétale pouvant être divisée. L'invention concerne en outre un procédé d'incorporation de ladite substance biologique, ainsi qu'un procédé de production et de façonnage des hydrogels à partir de solutions aqueuses. Les hydrogels de l'invention peuvent être utilisés en tant que matériau de gainage pour l'incorporation d'une substance biologique pouvant être divisée, notamment une substance végétale, de préférence des cellules végétales, protoplastes, tissus et organes végétaux, ainsi que embryons végétaux zygotiques et somatiques, dans des conditions stériles afin de protéger la substance lors de son stockage, son transport et sa manipulation. Les hydrogels de l'invention peuvent également contenir d'autres additifs, tels que des principes actifs végétaux ou des substances nutritives. La substance biologique incorporée selon l'invention peut être utilisée en tant que semence artificielle.

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