Results 51 to 60 of about 7,325 (251)

Customized chitooligosaccharide production—controlling their length via engineering of rhizobial chitin synthases and the choice of expression system

Frontiers in Bioengineering and Biotechnology, 2022
Chitooligosaccharides (COS) have attracted attention from industry and academia in various fields due to their diverse bioactivities. However, their conventional chemical production is environmentally unfriendly and in addition, defined and pure ...
Rita Weyer, Margareta J. Hellmann, Stefanie N. Hamer-Timmermann, Ratna Singh, Bruno M. Moerschbacher   +4 more
doaj   +1 more source

The Effect of N-Acetylation on the Anti-Inflammatory Activity of Chitooligosaccharides and Its Potential for Relieving Endotoxemia

International Journal of Molecular Sciences, 2022
Endotoxemia is mainly caused by a massive burst of inflammatory cytokines as a result of lipopolysaccharide (LPS) invasion. Chitooligosaccharides (COS) is expected to be a potential drug for relieving endotoxemia due to its anti-inflammatory properties ...
Wentong Hao, Kecheng Li, Xiangyun Ge, Haoyue Yang, Chaojie Xu, Song Liu, Huahua Yu, Pengcheng Li, R. Xing   +8 more
semanticscholar   +1 more source

Purification of DP 6 to 8 chitooligosaccharides by nanofiltration from the prepared chitooligosaccharides syrup [PDF]

Bioresources and Bioprocessing, 2014
Abstract Background Chitooligosaccharides (COS) with degrees of polymerization (DP) 6 to 8 are degraded from chitosan, which possess excellent bioactivities. However, technologies that could purify them from hydrolysis mixtures in the narrow DP range (984 to 1,306 Da) are absent.
Dong, Huizhong, Wang, Yaosong, Zhao, Liming, Zhou, Jiachun, Xia, Quanming, Jiang, Lihua, Fan, Liqiang   +6 more
openaire   +1 more source

Production of Chitooligosaccharides and Their Potential Applications in Medicine [PDF]

Marine Drugs, 2010
Chitooligosaccharides (CHOS) are homo- or heterooligomers of N-acetylglucosamine and D-glucosamine. CHOS can be produced using chitin or chitosan as a starting material, using enzymatic conversions, chemical methods or combinations thereof. Production of well-defined CHOS-mixtures, or even pure CHOS, is of great interest since these oligosaccharides ...
Vincent G. H. Eijsink, Kjell M. Vårum, Morten Sørlie, Anne Line Norberg, Ellinor B. Heggset, Berit B. Aam   +5 more
openaire   +3 more sources

Films of chitosan and chitosan-oligosaccharide neutralized and thermally treated: Effects on its antibacterial and other activities [PDF]

, 2016
The present study focuses on the effects of heat and neutralization treatments on solubility, water vapour permeability and antimicrobial activity of chitosan (Ch) and chitosan/chitooligosaccharide (ChO)-based films.
Azeredo, Cuero, Elena Díaz de Apodaca, Fernández-Saiz, Fernández-Saiz, Fernández-Saiz, Goy, Kong, Lagaron, Laura Fernández-de Castro, Leceta, Leceta, Leire Arroyo, Liu, Ma Carmen Villarán, Marian Mengíbar, Mengíbar, Ouattara, Park, Prashanth, Rivero, Ruban, Satyanarayana, Sebti, Souza, Sun, Tang, Umemura, Xia, Zivanovic, Ángela Sánchez, Ángeles Heras   +31 more
core   +1 more source

Chitooligosaccharides for wound healing biomaterials engineering [PDF]

Materials Science and Engineering: C, 2020
Chitooligosaccharides (CHOS) are oligomers of β-(1-4) linked N-acetylglucosamine and D-glucosamine that are produced from chitin or chitosan using different enzymatic or chemical methods. CHOS are water-soluble and non-cytotoxic with diverse bioactivities such as antibacterial, anti-inflammation, anti-obesity, anti-tumor and antioxidant.
Jafari, Hafez, Bernaerts, Katrien V, Dodi, Gianina, Shavandi, Armin   +3 more
openaire   +2 more sources

Cytotoxicity and genotoxicity of chitooligosaccharides upon lymphocytes [PDF]

International Journal of Biological Macromolecules, 2011
Two COS mixtures and a low molecular weight chitosan (LMWC) were tested for potential cytotoxicity and genotoxicity upon human lymphocytes. Genotoxicity was evaluated in vitro by cytokinesis-blocked micronucleus and alkaline comet assays, while cytotoxicity was assessed by flow cytometry analysis.
Fernandes, João C., Borges, Margarida, Nascimento, Henrique, Bronze-da-Rocha, Elsa, Ramos, Oscar S., Pintado, Manuela E., Malcata, F. Xavier, Santos-Silva, Alice   +7 more
openaire   +3 more sources

The Potential of Using Chitosan on Cereal Crops in the Face of Climate Change

Plants, 2021
This review presents the main findings from measurements carried out on cereals using chitosan, its derivatives, and nanoparticles. Research into the use of chitosan in agriculture is growing in popularity.
Joanna Kocięcka, Daniel Liberacki
doaj   +1 more source

Draft Genome Sequences of Salmonella enterica Serovar Typhimurium LT2 with Deleted Chitinases That Are Emerging Virulence Factors. [PDF]

, 2017
Chitinases are glycosyl hydrolases that catalyze the hydrolysis of the β-1,4 linkages in complex carbohydrates and those that contain GlcNAc. These enzymes are considered emerging virulence factors during infection because the host glycan changes.
Arabyan, Narine, Huang, Bihua C, Weimer, Bart C   +2 more
core   +1 more source

Biodegradable chitosan hydrogel film incorporated with polyvinyl alcohol, chitooligosaccharides, and gallic acid for potential application in food packaging

Cellulose
The food and beverage industry worldwide is trying to switch to using environment-friendly and bio-degradable materials in food packaging to avoid environmental concerns of using petroleum-derived plastic (synthetic polymers) materials.
S. Bhowmik, Dominic Agyei, Azam Ali
semanticscholar   +1 more source