Bioreduction performance of Cr(VI) by microbial extracellular polymeric substances (EPS) and the overlooked role of tryptophan

Interface Engineering of PdPt Ultrafine Ethanol Electro‐Oxidation Nanocatalysts by Bacterial Soluble Extracellular Polymeric Substances (s‐EPS) to Break through Sabatier Principle

“…In Figure a, apart from two straight lines caused by Rayleigh scattering of H 2 O, two main peaks (Excitation wavelength: 225 and 280 nm; Emission wavelength: 340 nm) are characteristic signals of tryptophan (Trp) contained materials, like proteins, enzymes, peptides, glycosidoproteins, and lipopeptids in s‐EPS. [ 14,19 ] These two peaks were apparently consumed after recovery (Figure 3b), demonstrating that Trp played an important role in the reducing reaction. Fourier transform infrared spectroscopy (FT‐IR) curves of s‐EPS, PdPt@s‐EPS, Pd@s‐EPS and Pt@s‐EPS provide more information of the recovery and synthetic mechanism (Figure 3c).…”

Mechanism Involved in Polyvinyl Chloride Nanoplastics Induced Anaerobic Granular Sludge Disintegration: Microbial Interaction Energy, EPS Molecular Structure, and Metabolism Functions

“…A parallel factor (PARAFAC) analysis was used to deal with the EEM data and identify EPS components . The functional groups and elemental forms of EPS were characterized with FTIR spectroscopy (Nicolet 6700, Thermo, USA) and X-ray photospectroscopy (XPS, K-Alpha+, Thermo, USA), respectively, , as detailed the SI (Text S3). Protein secondary structures were analyzed on the second-derivatized and deconvoluted spectra of the amide I band using Peakfit software (version 4.12, Seasolve Software Inc.).…”

“…A parallel factor (PARAFAC) analysis was used to deal with the EEM data and identify EPS components. 33 The functional groups and elemental forms of EPS were characterized with FTIR spectroscopy (Nicolet 6700, Thermo, USA) and X-ray photospectroscopy (XPS, K-Alpha+, Thermo, USA), respectively, 34,35 Zeiss, Germany) was applied to visualize EPS components in AnGS. 31 Bacterial Interaction Energy Based on XDLVO Theory.…”