Sonication-assisted extraction of chitin from North Atlantic shrimps (Pandalus borealis)

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	Sonication-assisted extraction of chitin from North Atlantic shrimps (Pandalus borealis)
	Kjartansson, Gunnar T. ; Zivanovic, Svetlana ; Kristbergsson, Kristberg ; Weiss, Jochen
刊名	JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
	2006
卷号	54 期号:16 页码:5894-5902
关键词	ULTRASONIC DEGRADATION MOLECULAR-WEIGHT BETA-CHITIN CHITOSAN SHELLS DERIVATIVES POLYMER
ISSN号	0021-8561
中文摘要	The influence of sonication during extraction of chitin from North Atlantic shrimp (NAS) shells (Pandalus borealis) on chitin yield, purity, and crystallinity was investigated. Shells were peeled, washed, lyophilized, ground, and suspended for 4 h in 0.25 M HCl (1: 40) at 40 degrees C followed by ultrasonication at 41 W/cm(2) for 0, 1, and 4 h, respectively. Demineralized shells were lyophilized, resuspended in 0.25 M NaOH (1: 40), and ultrasonicated at 41 W/cm(2) for 0, 1, and 4 h to remove proteins. The yield and mineral and protein contents were determined after each processing step. The purity of extracted chitin was determined from the total amount of glucosamine. The crystallinity index and size of crystals were calculated from wide-angle X-ray scattering measurements. Scanning electron microscope images were recorded to evaluate morphological changes in samples. The yield of chitin from NAS decreased from 16.5 to 11.4% for 0 and 1 h sonicated samples, respectively, which was attributed to increased concentrations of depolymerized materials in the wash water. Sonication did not enhance the removal of minerals. The application of ultrasound enhanced the removal of proteins from 39.8 to 10.6, 8.3, and 7.3% after 0, 1, and 4 h of sonication treatments. The crystallinity index of chitin decreased from 87.6 to 79.1 and 78.5% after 1 and 4 h of sonication, yielding chitosans with crystallinity indices of 76.7, 79.5, and 74.8% after deacetylation, respectively. Fourier transform infrared spectroscopy scans indicated that the degree of acetylation of chitins was unaffected by sonication. Comparison of the extraction results of NAS with that from freshwater prawns indicated that more impurities were left in NAS chitin, suggesting that composition and structural arrangement of chitin in shells influence the efficiency of ultrasound-assisted extraction.
收录类别	SCI
原文出处	10.1021/jf060646w
语种	英语
公开日期	2016-05-12
内容类型	期刊论文
源URL	[http://ir.xtbg.org.cn/handle/353005/9839]
专题	西双版纳热带植物园_文献共享
推荐引用方式 GB/T 7714	Kjartansson, Gunnar T.,Zivanovic, Svetlana,Kristbergsson, Kristberg,et al. Sonication-assisted extraction of chitin from North Atlantic shrimps (Pandalus borealis)[J]. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY,2006,54(16):5894-5902.
APA	Kjartansson, Gunnar T.,Zivanovic, Svetlana,Kristbergsson, Kristberg,&Weiss, Jochen.(2006).Sonication-assisted extraction of chitin from North Atlantic shrimps (Pandalus borealis).JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY,54(16),5894-5902.
MLA	Kjartansson, Gunnar T.,et al."Sonication-assisted extraction of chitin from North Atlantic shrimps (Pandalus borealis)".JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 54.16(2006):5894-5902.