Results 141 to 150 of about 36,000 (178)
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PVA Containing Chito-Oligosaccharide Side Chain
Polymer, 2000Abstract A chito-oligosaccharide (COS) with the number average degree of polymerization (DP n ) of 9 was immobilized on poly(vinyl alcohol) (PVA) by crosslinking with a bifunctional compound, N -methylolacrylamide (NMA). The reaction was composed of two successive steps, the reaction of COS with NMA in an acidic medium in the first step and the ...
Sohk-Won Ko, Yong-Woo Cho
exaly +2 more sources
Chemical Modification of Silk Fibroin With N-Acetyl-Chito-Oligosaccharides
International Journal of Biological Macromolecules, 1996N-Acetyl-chito-oligosaccharides (NACOS)-silk fibroin (SF) conjugates (NACOS-CY-SF) were prepared by the reaction of solubilized SF and cyanuric chloride (CY)-activated NACOS modifier (NACOS-CY). N-Acetyl-D-glucosamine (NAG), as a model compound, was reacted with CY to clarify the chemical structure of the modifier.
Yohko Gotoh +2 more
exaly +3 more sources
Carbohydrate Research, 1981
Abstract Several chito-oligosaccharides [β-(1→4)-linked oligosaccharides of 2-amino-2-deoxy- d -glucose] have been studied. A semi-empirical treatment of titration and rotation data indicates that the glycosidic torsion-angles (ΔΦ and ΔΨ) are all closely similar throughout the oligomers and also in the polymer (chitosan), in their fully protonated ...
Satoshi Tsukada, Yasuo Inoue
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Abstract Several chito-oligosaccharides [β-(1→4)-linked oligosaccharides of 2-amino-2-deoxy- d -glucose] have been studied. A semi-empirical treatment of titration and rotation data indicates that the glycosidic torsion-angles (ΔΦ and ΔΨ) are all closely similar throughout the oligomers and also in the polymer (chitosan), in their fully protonated ...
Satoshi Tsukada, Yasuo Inoue
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Antibacterial activity of Chito-oligosaccharides derived from Fish Scales
Research Journal of Pharmacy and Technology, 2022This study aimed to evaluate the antibacterial activity of chito-oligosaccharides (COS) from Tilapia fish scales. There is a massive potential in sustainably prospecting from these resources: algae, vertebrate, crustaceans, molluscs, residues from fish farms, and fisheries such as bones, skin, and fins, internal organs and non-bio-degradable substances
Gul-e-Saba Chaudhry +5 more
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Preparing Chito-Oligosaccharides as Antimicrobial Agents for Cotton
Textile Research Journal, 1999Cotton fabric with good antimicrobial activity and durability to washing is obtained by using chito-oligosaccharides without the need for a binding chemical as a crosslinker. The fully deacetylated chitosan is depolymerized into chito-oligosaccharide using sodium nitrite.
Ha-Soo Seong, Jae-Pil Kim, Sohk-Won Ko
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A reliable reducing end assay for chito-oligosaccharides
Carbohydrate Polymers, 2004The enzymatic degradation of chitin typically yields a mixture of chito-oligosaccharides of different size. This degradation process can be followed by measuring the production of reducing ends. We show that the widely used Schales' procedure does not permit accurate determination of reducing ends since the signal increases with the length of the chito-
Svein Jarle Horn, Vincent G.H. Eijsink
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Preparation of Antimicrobial Sodium Alginate With Chito-Oligosaccharide Side Chains
Journal of Polymer Science Part A, 2001AbstractTo provide sodium alginate (SA) with an antimicrobial property, we introduced chito‐oligosaccharide (COS) via chemical bonding in a two‐step procedure. We reacted COS with N‐methylol acrylamide (NMA) with N‐methylol groups to prepare acrylamidomethyl chito‐oligosaccharide (COS–NMA).
Jae Wook Song +2 more
exaly +2 more sources
Folia Microbiologica, 2021
Chitin exists in yeast cells both as free and bound in a complex with β-1,3/β-1,6-glucan. The formation of covalent links between chitin and β-glucans is catalyzed by the enzymes Crh1 and Crh2, acting as transglycosylases. We found that N-acetyl-chito-oligosaccharides, as well as laminarioligosaccharides, the respective products of partial hydrolysis ...
Ágnes Horváthová, Vladimír Farkaš
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Chitin exists in yeast cells both as free and bound in a complex with β-1,3/β-1,6-glucan. The formation of covalent links between chitin and β-glucans is catalyzed by the enzymes Crh1 and Crh2, acting as transglycosylases. We found that N-acetyl-chito-oligosaccharides, as well as laminarioligosaccharides, the respective products of partial hydrolysis ...
Ágnes Horváthová, Vladimír Farkaš
openaire +2 more sources
Antifungal effect of chito-oligosaccharides with different degrees of polymerization
European Journal of Plant Pathology, 2014Chitosan, obtained from chitin by partial N-deacetylation, shows little or no toxicity towards mammalian cells, is biodegradable, and non-allergenic. It is known that chitosan may have antifungal properties, but the effect of defined chitosan or chito-oligosaccharides (CHOS) with different degree of polymerization is not well known.
Md. Hafizur Rahman +4 more
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Detection of chitinase activity by 2-aminobenzoic acid labeling of chito-oligosaccharides
Analytical Biochemistry, 2009Chitinases are hydrolases capable of hydrolyzing the abundant natural polysaccharide chitin. Next to artificial fluorescent substrates, more physiological chito-oligomers are commonly used in chitinase assays. Analysis of chito-oligosaccharides products is generally accomplished by UV detection.
Ghauharali-van der Vlugt, Karen +4 more
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