Advanced   Register
XTBG OpenIR  > 文献共享  > 期刊论文

title: Sonication-assisted extraction of chitin from North Atlantic shrimps (Pandalus borealis)
author: Kjartansson, Gunnar T.;  Zivanovic, Svetlana;  Kristbergsson, Kristberg;  Weiss, Jochen
Issued Date: 2006
Abstract: 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.
Related URLs: 10.1021/jf060646w
Appears in Collections:文献共享_期刊论文

Files in This Item:

File SizeFormat
Sonication-assisted extraction of chitin from North Atlantic shrimps (Pandalus borealis)..pdf524KbAdobe PDFView  联系获取全文

全文许可: Creative Commons 署名-非商业性使用-相同方式共享 3.0

Recommended Citation:
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.

SCI Citaion Data:
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [Kjartansson, Gunnar T.]'s Articles
 [Zivanovic, Svetlana]'s Articles
 [Kristbergsson, Kristberg]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [Kjartansson, Gunnar T.]‘s Articles
 [Zivanovic, Svetlana]‘s Articles
 [Kristbergsson, Kristberg]‘s Articles
Scirus search
 Similar articles in Scirus
Related Copyright Policies
Social Bookmarking
  Add to CiteULike  Add to Connotea  Add to  Add to Digg  Add to Reddit 
所有评论 (0)
内 容:
Email:  *
验证码:   刷新
标 题:
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.



Valid XHTML 1.0!
Powered by CSpace