Results 151 to 160 of about 1,770 (174)
Some of the next articles are maybe not open access.
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
openaire +1 more source
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
openaire +1 more source
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 ...
Yong-Woo Cho, Sung-Soo Han, Sohk-Won Ko
openaire +1 more source
Chito-oligosaccharides derived from Tilapia Fish Scales; A Powerful Antioxidant
Research Journal of Pharmacy and Technology, 2023Fish scales are a good source of chitin and collagen that can be used in various cosmetic, biomedical, pharmaceutical, and food industries due to their stability and environmental friendliness. The antioxidant activities of chito-oligosaccharides derived from fish scales evaluated via i) DPPH free radical scavenging activity, ii) superoxide anion ...
Gul-e-Saba Chaudhry +5 more
openaire +1 more source
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. The average degree of polymerization (DP) of chito-oligosaccharide is determined
Ha-Soo Seong, Jae-Pil Kim, Sohk-Won Ko
openaire +1 more source
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
openaire +1 more source
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.
Y, Gotoh +3 more
openaire +2 more sources
Preparation of antimicrobial sodium alginate with chito‐oligosaccharide side chains
Journal of Polymer Science Part A: Polymer Chemistry, 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 +4 more
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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
openaire +3 more sources