the content of nucleic acids ( dna and rna ) and proteins in 1 mg of tissue and rna/dna and protein/dna ratio in different brain structures ( the neocortex , the hippocampus , the cerebellum , the brain-stem ) , as well as in the liver was studied in rats at different stages of postnatal ontogenesis ( 25 to 55 days ) in the norm , under ecological deprivation and in an information-enriched medium , involving elaboration of conditioned reflexes .
C0423896
content
C0006104
brain structures