Suscripción a Biblioteca: Guest
Portal Digitalde Biblioteca Digital eLibros Revistas Referencias y Libros de Ponencias Colecciones
International Journal of Medicinal Mushrooms
Factor de Impacto: 1.211 Factor de Impacto de 5 años: 1.394 SJR: 0.433 SNIP: 0.661 CiteScore™: 1.38

ISSN Imprimir: 1521-9437
ISSN En Línea: 1940-4344

Volumes:
Volumen 21, 2019 Volumen 20, 2018 Volumen 19, 2017 Volumen 18, 2016 Volumen 17, 2015 Volumen 16, 2014 Volumen 15, 2013 Volumen 14, 2012 Volumen 13, 2011 Volumen 12, 2010 Volumen 11, 2009 Volumen 10, 2008 Volumen 9, 2007 Volumen 8, 2006 Volumen 7, 2005 Volumen 6, 2004 Volumen 5, 2003 Volumen 4, 2002 Volumen 3, 2001 Volumen 2, 2000 Volumen 1, 1999

International Journal of Medicinal Mushrooms

DOI: 10.1615/IntJMedMushr.v12.i1.70
pages 73-85

The Effects of Temperature, pH, and Cations on the Rheological Properties of the Extracellular Polysaccharides of Medicinal Species of Genus Tremella Pers. (Heterobasidiomycetes)

Proma Khondkar
Department of Pharmacy, University of Rajshahi, Rajshahi-6205, Bangladesh; and School of Biological and Biomedical Sciences, Glasgow Caledonian University, City Campus, Glasgow, G4 0B A, UK
Kofi E. Aidoo
School of Biological and Biomedical Sciences, Glasgow Caledonian University, City Campus, Glasgow, G4 0B A, UK
Richard F. Tester
School of Biological and Biomedical Sciences, Glasgow Caledonian University, City Campus, Glasgow, G4 0B A, UK

SINOPSIS

Extracellular polysaccharides were produced from nine Tremella species using the malt-yeast (MY) media. The rheological properties of the polysaccharide solution were examined by the Power-law model. The extracellular polysaccharide solutions showed shear-thinning (pseudoplastic) behavior. The pseudoplasticity was more pronounced for 5% polysaccharide solutions. T. cinnabarina and T. indecorata polysaccharide solutions (0.1% w/v) gave the highest and lowest viscosities—9.18 and 1.73 mPa, respectively—at 25°C and at a shear rate of 150 s−1. The effects of chemical and physical factors on solution viscosity were studied. The viscosity of solutions decreased with an increase in temperature and also at extreme pH values. Rheological analysis revealed that divalent cations (calcium and zinc) did not increase the viscosity of polysaccharides, but monovalent cations (sodium and potassium) did, which suggests that ionic bridging occurred between polymer chains. A synergistic increase in the viscosity of the solution was observed when the polysaccharides were mixed with xanthan.


Articles with similar content:

INFLUENCE OF RHEOLOGICAL PROPERTY CHANGES ON FRICTION AND CONVECTIVE HEAT TRANSFER IN A VISCOELASTIC POLYACRYLAMIDE SOLUTION
International Heat Transfer Conference 6, Vol.5, 1978, issue
Т. T. Tung, K. S. Ng , James P. Hartnett
Enhanced Bioactive Exopolysaccharide Production by Mossy Maze Polypore, Cerrena unicolor (Higher Basidiomycetes) in Submerged Culture Conditions
International Journal of Medicinal Mushrooms, Vol.17, 2015, issue 7
Bukay Yenice Gursu, Mustafa Yamac, Ayse Betul Karaduman, Burcu Altinay
Characterization of Exopolysaccharide Produced by Phellinus vaninii (Agaricomycetes) and Antioxidant Potential for Meat Batter
International Journal of Medicinal Mushrooms, Vol.21, 2019, issue 5
Yanchao Yao, Xuewei Jia, Junguang Li, Yanhong Bai
Effect of Hormesis in Dunaliella viridis Teodor. (Chlorophyta) Under the Influence of Copper Sulfate
International Journal on Algae, Vol.14, 2012, issue 1
Swaran Flora, A. I. Bozhkov, M. K. Kovaleva, Anshu Jain, N. G. Menzyanova, Abhishek Yadav
INVESTIGATION ON LAMINAR FLOW AND HEAT TRANSFER CHARACTERISTICS OF MICROALGAE SLURRIES WITH RHEOLIGICAL PROPERTIES
Second Thermal and Fluids Engineering Conference, Vol.28, 2017, issue
Qian Fu, Xun Zhu, Ao Xia, Qiang Liao, Hao Chen, Yun Huang