Chitin oligomer

The amount of chitin tetramer required to elicit the response, when administered as a single dose, was relatively high. One explanation for this phenomenon was that chitin oligomers are unstable in wheat leaf tissue, and that administration as a single dose did not properly mimic the low, but continual, levels that would be released from the polymer. This was supported by the observation that the tetramer, when administered... 

Wheat Germ Agglutinin a Possible Receptor for Chitin Oligomers ... 

Chitin was prepared by the catalysis of chitinase. Incubation of a chitobiose oxazoline monomer with chitinase form bacillus sp. in phosphate buffer afforded chitin in quantitative yield (122). Using regiospecific 3-0- and/ or 3 -0-methylated derivatives of a chitobiose oxazoline as new substrate monomers, 3-0-methylated chitin oligomers were produced by enzymatic oligomerization using chitinase (123). 

Sakamoto J, Kobayashi S. Enzymatic synthesis of 3-0-Methylated chitin oligomers from new derivatives of a chitobiose oxazoline. Chem. Lett. 2004 33 698-699. 

Several reports on chemical hydrolysis (including acid hydrolysis) for preparation of chitin oligomers have been cited (Bosso et al., 1986 Defaye et al., 1989 Hirano and Nagano, 1989 Inaba et al., 1984 Kendra et al., 1989 Kurita et al., 1993 Rupley, 1964 Sakai et al., 1990 Takahashi et al., 1995). A series of chitin oligomers, up to hexamer, has been prepared by... 

There are many traditional methods for isolation of chitin oligomers. The procedures involved acid hydrolysis, neutralization, demineralization, fractionation by charcoal-celite column, fractionation by high-performance liquid chromatography (HPLC), and lyophilization. 

N-Acetylglucosamine Glucosamine Chitosan oligomers Chitin oligomer... 

Akiyama, K., K. Kawazu, and A. Kobayashi. 1995. A novel method for chemo-enzymic synthesis of elicitor-active chitosan oligomers and partially A-deacetylated chitin oligomers nsing A-acylated chitotrio-ses as substrates in a lysozyme-catalyzed transglycosylation reaction system. Carbohydr. Res. 279 151-160. 

Einbu A. and Varum K. M. 2007. Depolymeiization and de-N-acetylation of chitin oligomers in hydrochloric acid. Biomacromolecules 8 309-314. 

FIGURE 37.6 The different transepidermal or transdermal skin penetration and the relative product s effectiveness will he directly tied to the used emulsion, to the size of the chitin oligomer, and to the different bounds between the oligomer and the active compounds. 

Ben-Shalom, N., Kudabeava, N., and Pinto, R. 2000. Controlling elicitation of chitin oligomers and chitosan in tomato leaves through their molecule structure. In Uragami, T., Kurita, K., and Fukumizo, T. (eds.), Chitin and Chitosan in Life Science. Kodansha Scientific Ltd., Tokyo, Japan, pp. 309-312. 

It can be said that chitin is most relevant to our health and welfare, because of the very important interactions between human life and chitin-based life 1. To explain the importance of the knowledge of the chemistry of chitin for the biomedical sciences, we could mention the well-known investigation on structure and function of lysozyme carried out with chitin oligomers lysozyme is present in human body fluids as a defence against chitinous organisms on which it exerts hydrolytic action. A further example is the research on heparin and heparinoids heparin is probably the polysaccharide most closely related to chitin that can be found in the human body, where it reacts specifically with blood components to control blood fluidity and coagulation. 

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