Article (Scientific journals)
Influence of extraction conditions on characteristics of microbial polysaccharide kefiran isolated from kefir grains biomass
Pop Rodica, Carmen; Salanţă, Liana; Rotar, Ancuţa M. et al.
2016In Journal of Food and Nutrition Research
Peer Reviewed verified by ORBi
 

Files


Full Text
jfnr201614.pdf
Publisher postprint (391.61 kB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
kefir grains; lactic acid bacteria; kefiran; rheological properties
Abstract :
[en] Kefiran is a water-soluble polysaccharide, which can be isolated from kefir grains biomass. Rheological behaviour and physico-chemical characteristics of kefiran solutions were influenced by the extraction parameters. Degradation of the polymer chain occurred at the highest temperature tested (100 °C). The intrinsic viscosity of kefiran solutions (0.1 g·ml-1) varied between 8.24 mPa at 100 °C to 19.32 mPa at 80 °C. Regarding rheological properties, kefiran solutions had characteristics of a Newtonian behaviour in diluted solutions and pseudoplastic at higher concentrations. High-performance liquid chromatography analysis of monosaccharides revealed that kefiran is composed of glucose and galactose in a relative molar ratio of 0.94–1.1. Infrared spectra of kefiran suggested the structure of α- and β-configurations in pyranose-form carbohydrates, which indicated a purified structure of kefiran. The molecular weight of kefiran polymer was between 2.4 × 106 Da and 1.5 × 107 Da, the values of molecular weight depending on extraction conditions. This polysaccharide was found to have higher intrinsic viscosity and higher apparent viscosity in aqueous solutions, which brings a perspective for its use as thickening or gelling agent in food, or as a matrix in film-forming solutions.
Disciplines :
Food science
Author, co-author :
Pop Rodica, Carmen;  Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca > Department of Food Engineering
Salanţă, Liana;  Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca > Department of Food Science
Rotar, Ancuţa M.;  Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca > Department of Food Science
Semeniuc, Cristina A.;  Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca > Department of Food Engineering
Socaciu, Carmen;  Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca > Department of Food Science
Sindic, Marianne  ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Laboratoire Qualité et sécurité des produits agro-aliment.
Language :
English
Title :
Influence of extraction conditions on characteristics of microbial polysaccharide kefiran isolated from kefir grains biomass
Publication date :
26 March 2016
Journal title :
Journal of Food and Nutrition Research
ISSN :
1336-8672
Publisher :
VÚP Food Research Institute NAFC, Bratislava, Slovakia
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 10 June 2016

Statistics


Number of views
251 (13 by ULiège)
Number of downloads
4 (1 by ULiège)

Scopus citations®
 
14
Scopus citations®
without self-citations
13

Bibliography


Similar publications



Contact ORBi