id	keyword
american_scientific_journal-2550	zno
american_scientific_journal-2550	pectin
american_scientific_journal-2550	peel
american_scientific_journal-2550	nanocomposites
american_scientific_journal-2550	citrus
american_scientific_journal-2550	pomelo
american_scientific_journal-2550	citron
american_scientific_journal-2550	research
american_scientific_journal-2550	cppt
american_scientific_journal-2550	zno nanocomposites
american_scientific_journal-2550	pppt
american_scientific_journal-2550	sciences
american_scientific_journal-2550	solution
american_scientific_journal-2550	test
american_scientific_journal-2550	peel pectin