id	keyword
american_scientific_journal-1739	oil
american_scientific_journal-1739	methyl
american_scientific_journal-1739	emetica
american_scientific_journal-1739	acid
american_scientific_journal-1739	shell
american_scientific_journal-1739	biodiesel
american_scientific_journal-1739	esters
american_scientific_journal-1739	nmr
american_scientific_journal-1739	fatty