id	keyword
american_scientific_journal-3944	bioi
american_scientific_journal-3944	spheres
american_scientific_journal-3944	plates
american_scientific_journal-3944	journal
american_scientific_journal-3944	degradation
american_scientific_journal-3944	norfloxacin
american_scientific_journal-3944	bioi spheres
american_scientific_journal-3944	research