Results 141 to 150 of about 21,125 (178)
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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
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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
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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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Carbohydrate Polymers, 2013
Chito-oligosaccharides (COS) are being used as important functional materials for many applications due to their bioactivities. The aim of this research has been to assess the relationship between the physico-chemical characteristics, average molecular weight (Mw), acetylation degree (DA), polymerization degree (DP) and specially sequence composition ...
Marian, Mengíbar +3 more
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Chito-oligosaccharides (COS) are being used as important functional materials for many applications due to their bioactivities. The aim of this research has been to assess the relationship between the physico-chemical characteristics, average molecular weight (Mw), acetylation degree (DA), polymerization degree (DP) and specially sequence composition ...
Marian, Mengíbar +3 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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Immunopotentiating Effect of N-Acetyl-Chito-Oligosaccharides
1986In our previous papers on this subject (1, 2), we revealed that chit in and chitosan were able to display growth-inhibitory effects against tumor cells or pathogenic microbes inoculated in the peritoneal cavity of mice. The action mechanism of both polysaccharides was assumed to involve the active tion of phagocytic cells attracted to the peritoneal ...
S. Suzuki +4 more
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Phytomedicine, 2014
Phenylethanoid glycosides, the main active ingredients in Fructus Forsythiae extract possesses strong antibacterial, antioxidant and antiviral effects, and their contents were higher largely than that of other ingredients such as lignans and flavones, but their absolute bioavailability orally was significantly low, which influenced clinical efficacies ...
Liuqing Di, Jin Jun Shan, Baochang Cai
exaly +3 more sources
Phenylethanoid glycosides, the main active ingredients in Fructus Forsythiae extract possesses strong antibacterial, antioxidant and antiviral effects, and their contents were higher largely than that of other ingredients such as lignans and flavones, but their absolute bioavailability orally was significantly low, which influenced clinical efficacies ...
Liuqing Di, Jin Jun Shan, Baochang Cai
exaly +3 more sources
A chitosanase from Paecilomyces lilacinus with binding affinity for specific chito‐oligosaccharides
Biotechnology and Applied Biochemistry, 2005A purple‐spore, rhizosphere‐inhabiting nematophagous fungus, further identified as Paecilomyces lilacinus, was found to grow on chitosanase‐detecting plate. An induced endochitosanase having a molecular mass of 23 kDa was purified from the culture medium by a single cation‐exchange column‐chromatography step.
Yi-Yun, Chen +3 more
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