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Preparation of protein concentrates from symphytum asperrimum russian comfrey for nonruminant feeds and human foods


Food Chemistry 7(2): 109-116
Preparation of protein concentrates from symphytum asperrimum russian comfrey for nonruminant feeds and human foods
Extracts were prepared from fresh Russian comfrey plants by successive extractions with water and NaOH. Almost 55% of crop dry matter and 69% of crop crude protein were extracted. The extracts were then acidified to produce precipitates that contained 21.7% of crop dry matter and 52.6% of crop crude protein. The crude protein in these precipitates was > 90% true protein; it is suggested that such concentrates may prove to be valuable as non-ruminant feeds. The solid residues, containing 11-12% of crude protein, may be usable as feed for beef cattle. Large quantities (33%) of crop dry matter remain in the supernatants following precipitation at low N levels (6.9%) and would probably be usable for microbial protein production following enrichment with a N source.


Accession: 006173725



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