Identification of composition and structure of functional groups of ferment lysates based on IR spectroscopy

Abstract

The paper provides the analysis of IR spectra of ferment lysates, which showed that there are a number of weak bands 1050-1150 cm−1 in spectra typical for vibrations of ester bonds and frequency 1150-1300 cm−1 corresponding vibrations of CH2 groups in fats. Given the high intensity of the peaks at 2800-3000 cm−1, the high intensity of the peaks at 1600-1700 cm−1 and 1500-1550 cm−1 (typical for amino acids) can be assumed to be high in amino acids containing NH3, CH2 and CH3 groups. The study showed that hydrolysis products (ferment lysates) derived from secondary fish processing products have similar protein structure and identical peptide fragments.

Plasma-Induced Graft Polymerization of Polyethylenimine onto Chitosan/Polycaprolactone Composite Membrane for Heavy Metal Pollutants Treatment in Industrial Wastewater

“…Electrospun CS/PCL nanofibers were subjected to atmospheric pressure nitrogen plasma (APNP) for fiber activation. In Figure 3, a noticeable decrease of intensity in -NH bending vibration (assigned to 1580 cm −1 ) when increasing the plasma exposure time, while significant increase in C-O-C stretching bands (1295, 1245, 1195, 1045 cm −1 ) are observed [52]. Sites originally with amino functional groups are being replaced with newly…”