0-Chitin structure

Chirality center, 292 detection of, 292-293 Eischer projections and, 975-978 R,S configuration of, 297-300 Chitin, structure of, 1002 Chloral hydrate, structure of, 707 Chloramphenicol, structure of, 304 Chlorine, reaction with alkanes, 91-92,335-338 reaction with alkenes, 215-218 reaction with alkynes, 262-263 reaction with aromatic compounds, 550 Chloro group, directing effect of, 567-568... 

Blackwell J, Gardner KH, Kolpak FJ, Minke R, Claffey WB (1980) Refinement of cellulose and chitin structures. Chapt 19. In French AD, Gardner KH (eds) Fiber diffraction methods. Am Chem Soc Symp Ser 141, pp 315-334... 

Chitin is a stable compoimd, incompatible with oxidizing agents [59]. In the solid state imder alkaline condition (e.g., NaOH, KOH, heat at about 120 °C) or by enzymatic hydrolysis in the presence of a chitin deacetylase, it hydrolyses to form the deacetylated degradation product chitosan [6,7,10,11]. It was found that the presence of urea in basic media and at low temperature (—20 °C) had little effect on chitin structure and that urea is of benefit to the stability of chitin solution [38]. 

Chitin. Chitin, the seeond most abundant organie compound, is similar to cellulose, exeept it is composed of Af-acetylglucosamine in a jS-(l,4) linkage. (The chitin structure can be recovered from Equation (A.3-2) by replacing the -OH at carbon-2 with an -NH-CO-CH3.) Because chitin is readily available and occurs naturally in many insects and marine organisms, it is a popular component of cosmetic and health-care products. The Japanese Ministry of Health and Welfare approved chitosan as an ingredient for hair-care products in 1986, carboxymethylchitosan as skin-care product in 1987, and chitin non-woven fabric as skin substitute in 1988 [2]. 

Isolation of Expanded Chitin Structures from Fungi. 169... 

CHITIN STRUCTURE IN THE SOLID STATE 8.2.1 General Remarks... 

Fukamizo, T., Krame, K.J., Mueller, D.D., Schaefer, J., Garbow, J., and Jacob, G.S. 1986b. Analysis of chitin structure by nuclear magnetic resonance spectroscopy and chitinolytic enzyme digestion. Arch. Biochem. Biophys. 249 15-26. 

Cabib, E., Chitin Structure, metabolism, and regulation of biosynthesis, in Plant Carbohydrates II. Extracellular Carbohydrates (W, Tanner and F. A. Loewus, eds.), 395-415, Springer-Verlag, Berlin, 1981. 

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