TY  - JOUR
U1  - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed)
A1  - Alzagameem, Abla
A1  - Klein, Stephanie Elisabeth
A1  - Bergs, Michel
A1  - Do, Xuan Tung
A1  - Korte, Imke
A1  - Dohlen, Sophia
A1  - Hüwe, Carina
A1  - Kreyenschmidt, Judith
A1  - Kamm, Birgit
A1  - Larkins, Michael
A1  - Schulze, Margit
T1  - Antimicrobial Activity of Lignin and Lignin-Derived Cellulose and Chitosan Composites Against Selected Pathogenic and Spoilage Microorganisms
JF  - Polymers
N2  - The antiradical and antimicrobial activity of lignin and lignin-based films are both of great interest for applications such as food packaging additives. The polyphenolic structure of lignin in addition to the presence of O-containing functional groups is potentially responsible for these activities. This study used DPPH assays to discuss the antiradical activity of HPMC/lignin and HPMC/lignin/chitosan films. The scavenging activity (SA) of both binary (HPMC/lignin) and ternary (HPMC/lignin/chitosan) systems was affected by the percentage of the added lignin: the 5% addition showed the highest activity and the 30% addition had the lowest. Both scavenging activity and antimicrobial activity are dependent on the biomass source showing the following trend: organosolv of softwood > kraft of softwood > organosolv of grass. Testing the antimicrobial activities of lignins and lignin-containing films showed high antimicrobial activities against Gram-positive and Gram-negative bacteria at 35 °C and at low temperatures (0-7 °C). Purification of kraft lignin has a negative effect on the antimicrobial activity while storage has positive effect. The lignin release in the produced films affected the activity positively and the chitosan addition enhances the activity even more for both Gram-positive and Gram-negative bacteria. Testing the films against spoilage bacteria that grow at low temperatures revealed the activity of the 30% addition on HPMC/L1 film against both B. thermosphacta and P. fluorescens while L5 was active only against B. thermosphacta. In HPMC/lignin/chitosan films, the 5% addition exhibited activity against both B. thermosphacta and P. fluorescens.
KW  - antimicrobial activity
KW  - antiradical activity
KW  - chitosan
KW  - hydroxypropylmethylcellulose
KW  - lignin
KW  - pathogenic microorganisms
KW  - organosolv
UN  - https://nbn-resolving.org/urn:nbn:de:hbz:1044-opus-44582
SN  - 2073-4360
SS  - 2073-4360
U6  - https://doi.org/10.3390/polym11040670
DO  - https://doi.org/10.3390/polym11040670
PM  - 30979077
VL  - 11
IS  - 4
PB  - MDPI
CY  - Basel
ER  -