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Table 3 FTIR spectrum analysis of functional groups of EPS present in biofilms of stucco mask

From: Implications of colonizing biofilms and microclimate on west stucco masks at North Acropolis, Tikal, Guatemala

Sample 1 Sample 2 Functional group
Absorption bands  
3315 3315 Hydroxyl group (−OH)
2928 2928 Alkyl group (−CH 2 -)
  1805 Carboxyl group (−COOH), aldehyde group (−CHO) or esterfunction (−COOR)
1642 1642 Carbonyl group (−C = O or –CHO) Amide group (NH 2 )
1450 1450 Alkyl group (−CH 2 - or –CH 3 )
1036 1036 Hydroxyl group (−OH)