National Center for Biotechnology Information NCBI NLM MEDLINE animals pubmed abstract nih national institutes of health national library of medicine research support u.s. gov't male Ethanol / toxicity* P.H.S. Rats Sprague-Dawley dentate gyrus / pathology olfactory bulb / pathology necrosis central nervous system depressants / toxicity* neurodegenerative diseases / pathology olfactory bulb / drug effects neurodegenerative diseases / chemically induced staining and labeling fluorescent dyes pmid:11981132 j a obernier t w bouldin f t crews aging / drug effects* aging / pathology* astrocytes / ultrastructure cell death / drug effects cerebral cortex / drug effects cerebral cortex / pathology dna fragmentation / drug effects dentate gyrus / ultrastructure eosine yellowish-(ys) fluoresceins hematoxylin in situ nick-end labeling organic chemicals