id	keyword
american_scientific_journal-3392	238u
american_scientific_journal-3392	activity
american_scientific_journal-3392	232th
american_scientific_journal-3392	dose
american_scientific_journal-3392	water
american_scientific_journal-3392	bq.l-1
american_scientific_journal-3392	40k
american_scientific_journal-3392	samples
american_scientific_journal-3392	concentrations