id	keyword
american_scientific_journal-4464	electron
american_scientific_journal-4464	samples
american_scientific_journal-4464	elements
american_scientific_journal-4464	ion
american_scientific_journal-4464	beam
american_scientific_journal-4464	trace
american_scientific_journal-4464	film
american_scientific_journal-4464	frequency
american_scientific_journal-4464	study
american_scientific_journal-4464	air
american_scientific_journal-4464	dielectric
american_scientific_journal-4464	irradiation
american_scientific_journal-4464	research