id	keyword
american_scientific_journal-872	cotton
american_scientific_journal-872	stalk
american_scientific_journal-872	cellulose
american_scientific_journal-872	percent
american_scientific_journal-872	acid
american_scientific_journal-872	acetylation
american_scientific_journal-872	reaction
american_scientific_journal-872	weight
american_scientific_journal-872	cotton stalk
american_scientific_journal-872	time
american_scientific_journal-872	engineering