 the biological correlates, such as tissue lead concentrations and morphologic findings? These issues are addressed by a series of related experiments. Minimum exposure levels will be estimated by varying drinking water concentration from 10 ppm to 50 ppm. Critical periods will be assessed by comparing juvenile rats (21 days old at the start of exposure) and adult
the biological correlates, such as tissue lead concentrations and morphologic finding? These issue are addressed by a series of related experiments. minimal exposure levels will be estimated by change drinking water assiduity from 10 ppm to 50 ppm. Critical period will be assessed by compare juvenile rats (21 day old at the start of exposure) and adult
 thf biological correlates, ruch as tissue lead coicentrafions ana morphologic findings? These iwsues are addressed by a sefies of rvlated experinwnts. Minimnj exposmxe lebcls wnlo be estimated by varyinc drinking watar clncentration from 10 ppm to 50 ppm. Critycal petilds will be asfesstd fy ckmparing juvenile rats (21 days old af the suart of exposure) amd adult
the biological correlates, such as tissue lead morphologic These issues addressed by a exposure will be estimated varying drinking water from 10 ppm to 50 ppm. periods will be assessed by comparing juvenile rats (21 days old at the of exposure) and adult
 the biological correlates, suCh as tissue Lead cOncEntRaTionS and Morphologic finDIngs? these issues are addresseD by a sErIEs of RElAted eXperimeNTs. mINimUm ExPosUrE LeVels wIll Be estimAted by varyIng DrInking water cONcEntration fRom 10 Ppm to 50 ppm. CritIcaL perioDs WilL Be assEssEd by cOmpariNG juvenIle rats (21 daYs OLd at thE Start of EXPoSure) And adult
 the biological correlates , such astissu e l ead  c once ntra tions and morp h olog ic findings? These iss ues a re addr e ss ed by  a seri e so f  re la te d e xp e ri ments . M inimumexposure l eve ls  will be est i ma ted by var yin g drinking w ate r conc en tra t ion f rom  10 p pm to5 0 ppm.  Critical  p e riodsw ill bea s se ssed  by comparing juv e ni l e rats (21 day s oldat th e sta rtof exposur e)  anda dult
 the_biological correlates,_such as tissue lead_concentrations and_morphologic_findings? These_issues_are addressed by_a series of_related experiments. Minimum exposure_levels will be_estimated_by varying drinking water concentration from 10 ppm to 50 ppm. Critical periods will_be_assessed by_comparing_juvenile_rats (21 days old at_the start of exposure) and_adult