2013 Fiscal Year Final Research Report
Structural polysaccharide newly prepared from the toxic crab inhabiting subtropical areas
| Project/Area Number |
23580280
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Fisheries chemistry
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| Research Institution | Hiroshima University |
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Principal Investigator |
ASAKAWA Manabu 広島大学, 生物圏科学研究科, 准教授 (60243606)
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| Project Period (FY) |
2011 – 2013
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| Keywords | ヤシガニ / キチン / キトサン / 構造多糖類 / 固体NMR / 走査電子顕微鏡 / IR / X線回折 |
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| Research Abstract |
Chitin is one of the most abundant biopolymers on the Earth. In this research, chitin was purified from the exoskeleton of coconut crabs Birgus latro in Ishigaki Island, Okinawa prefecture, Japan and their characters were examined by some instrumental analysis. In scanning electron microscopy (SEM) analysis, the surface image of this chitin shows network structure. In infrared (IR) spectrophotometry analysis, the C=O stretching (amide I) band at 1622-1667 cm-1 appeared. CP/MAS 13C-NMR can easily distinguish between two types of chitin because of differing spectral appearances in the region of ring carbons (110-50 ppm); one shows six well-defined resonances.Six resonance lines at 104.300(C1), 83.459(C4), 76.026(C5), 73.694(C3), 61.306(C6) and 55.476(C2) ppm are clearly shown. Gel strength of chitosan-formaldehyde gel from coconut crabs is 6 times stronger than that of chitosan-formaldehyde gel prepared from chitosan standard.
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[Journal Article] Taxonomic Identity of a Tetrodotoxin-Accumulating Ribbon-worm Cephalothrix simula (Nemertea : Palaeonemertea): A Species Artificially Introduced from the Pacific to Europe2013
Author(s)
H.Kajihara, SC. Sun, AV.Chernyshev, HX. Chen, K.Ito,M.Asakawa, SA. Maslakova, JL. Norenburg, M. Strand, P.Sundberg, F.Iwata
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Journal Title
Zoological Science
Volume: 30
Pages: 985-997
Peer Reviewed
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