Results 301 to 310 of about 153,830 (348)
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Shrimp chitin as substrate for fungal chitin deacetylase
Applied Microbiology and Biotechnology, 2001The fungal chitin deacetylases (CDA) studied so far are able to perform heterogeneous enzymatic deacetylation on their solid substrate, but only to a limited extent. Kinetic data show that about 5-10% of the N-acetyl glucosamine residues are deacetylated rapidly. Thereafter enzymatic deacetylation is slow.
N N, Win, W F, Stevens
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Enzymatic degradation of chitins and partially deacetylated chitins
International Journal of Biological Macromolecules, 1994The enzymatic (lysozyme, chitinase etc.) digestibility of chitins obtained from squid pen and shrimp shell, and of partially deacetylated chitins (DA-chitins) was investigated. The digestibility of various chitins by the chitinase from Bacillus sp. PI-7S was much higher than that by lysozyme, and beta-chitin was digested more smoothly than alpha-chitin.
Y, Shigemasa +3 more
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The presence of α-chitin in Tardigrada with comments on chitin in the Ecdysozoa
Zoologischer Anzeiger - A Journal of Comparative Zoology, 2016Abstract We used Fourier Transform Infrared Spectroscopy (FT-IR) to characterize for the first time chitin in the cuticle of a eutardigrade ( Macrobiotus cf. hufelandi ). Analysis of the isolated cuticles of single individuals and comparison with commercial α-chitin isolated from shrimp shell and β-chitin from squid pen revealed that the amide I ...
Greven, Hartmut +2 more
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Biochimica et Biophysica Acta, 1960
Abstract A new structure is proposed for the polysaccharide chitin, [C8H13O5N]n. X-ray diffraction fibre photographs of lobster tendon reveal a well-defined orthorhombic lattice with the space group P212121 and cell dimensions of a = 4.69 A , b = 19.13 A , and c = 10.43 A (fibre repeat).
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Abstract A new structure is proposed for the polysaccharide chitin, [C8H13O5N]n. X-ray diffraction fibre photographs of lobster tendon reveal a well-defined orthorhombic lattice with the space group P212121 and cell dimensions of a = 4.69 A , b = 19.13 A , and c = 10.43 A (fibre repeat).
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Thermal characteristics of chitin and hydroxypropyl chitin
Polymer, 1994Abstract The thermal properties of chitin and hydroxypropyl chitin (HPCH) were examined. Hydroxypropyl chitin was prepared from chitin and propylene oxide. The structure of HPCH was confirmed by solid-state 13 C nuclear magnetic resonance and Fourier-transform infra-red spectroscopy. From the results of elemental analysis, the degree of substitution
Seong Soo Kim +3 more
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Chitin solutions and purification of chitin
1988Publisher Summary This chapter describes the dissolution and purification of chitin isolates via the newer anhydrous media. There is no clear line of demarcation between chitin isolation and its purification, but the isolation method affects chitin quality and in part determines any additional dissolution and other purification steps required.
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NMR studies of chitin and chitin derivatives
Die Makromolekulare Chemie, 1982AbstractThe 13C NMR spectra of N‐acetyl‐D‐glucosamine (1) and chitobiose (2), monomer and dimer of chitin, were assigned and used to assign the 13C NMR spectra of chitin in lithium thiocyanate and in LiCl/dimethylacetamide solutions. The dissolution of chitin in formic acid was studied.
Gagnaire, D. +2 more
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Journal of Cell Science
ABSTRACT In ‘Reichert’s Archiv ‘for I860,’ part 1, M. A. Baur has published an interesting memoir on the chitinous tendons of Articulata, and their relation to the change of skin. The simplest and oldest view of these structures regarded them as being nothing more than inward prolongations of the outer skeleton, resembling true tendons ...
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ABSTRACT In ‘Reichert’s Archiv ‘for I860,’ part 1, M. A. Baur has published an interesting memoir on the chitinous tendons of Articulata, and their relation to the change of skin. The simplest and oldest view of these structures regarded them as being nothing more than inward prolongations of the outer skeleton, resembling true tendons ...
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2009
Abstract Natural Resources Chitin is a biopolymer found in crustaceans shells (crab, shrimp, prawn, lobster) in some mollusks (krill, oyster, clam shells, squid skeleton). It is also found in fungi (mushrooms, yeast) and in various insects (cockroaches, silkworms, spiders, beetles).
Rachel Mansencal +2 more
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Abstract Natural Resources Chitin is a biopolymer found in crustaceans shells (crab, shrimp, prawn, lobster) in some mollusks (krill, oyster, clam shells, squid skeleton). It is also found in fungi (mushrooms, yeast) and in various insects (cockroaches, silkworms, spiders, beetles).
Rachel Mansencal +2 more
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