Assessment of 2,4-Di-tert-butylphenol induced modifications in extracellular polymeric substances.pdf

Bioresource Technology 188 (2015) 185–189Contents lists available at ScienceDirect Bioresource Technology journal homepage: www.elsevier .com/locate /bior techShort CommunicationAssessment of 2,4-Di-tert-butylphenol induced modifications in extracellular polymeric substances of Serratia marcescens/10.1016/j.biortech.2015.01.049 0960-8524/ 2015 Elsevier Ltd. All rights reserved. ? Corresponding author. Tel.: +91 4565 225215; fax: +91 4565 225202. E-mail address: sk_pandian@ (S.K. Pandian).Alwar Ramanujam Padmavathi, Murugesan Periyasamy, Shunmugiah Karutha Pandian ? Department of Biotechnology, Alagappa University, Science Campus, Karaikudi 630004, TN, Indiah i g h l i g h t s  Effect of DTBP on EPS of S. marcescens was evaluated using biophysical techniques.  Thermostability of S. marcescens EPS was unveiled for the first time.  DTBP reduced the crystallinity index and crystallite size of S. marcescens EPS.  DTBP increased the dislocation density and hydration in EPS.  Modulating EPS will aid in disintegrating matured biofilm.g r a p h i c a l a b s t r a c ta r t i c l e i n f o Article history: Received 27 November 2014 Received in revised form 9 January 2015 Accepted 10 January 2015 Available online 21 January 2015 Keywords: 2,4-Di-tert-butylphenol EPS XRD DSC Serratia marcescensa b s t r a c t Extracellular polymeric substances (EPS) play crucial roles in biofilm formation and biocorrosion result- ing in heavy economic loss in an industrial setup. Hence, in an attempt to develop an agent to control the EPS across the hosts, the ability of 2,4-Di-tert-butylphenol (DTBP), a potent antioxidant, to modify the EPS of Serratia marcescens has been investigated in this study using biophysical methods. Protein, polysaccha- rides and eDNA components of EPS were inhibited significantly (p 0.05) upon exposure to DTBP. DTBP treatment reduced the crystallite size and crystallinity index of EPS and increased the dislocation density of crystallites without inducing stres