id	keyword
american_scientific_journal-7330	chitosan
american_scientific_journal-7330	crab
american_scientific_journal-7330	colleagues
american_scientific_journal-7330	chitin
american_scientific_journal-7330	journal
american_scientific_journal-7330	shells
american_scientific_journal-7330	vol
american_scientific_journal-7330	segnis
american_scientific_journal-7330	method
american_scientific_journal-7330	deacetylation
american_scientific_journal-7330	activity