Characterization of Some Fungal Chitosans

Mizumoto, Hiroshi; Shimura, Kaori; Watanabe, Kanako; Onodera, Kônoshin

doi:10.1271/bbb.56.1901

Cited by 54 publications

(28 citation statements)

References 6 publications

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“…The contents vary from 1-10% of the dry weight of cells. Different fungal species such as Absidia coerulea, Rhizopus delemar, Cunninghamella blackesleeana and Mortierella isabelina were found to contain 6.7-10.4% chitosan of the dry weight of cells (Miyoshi et al, 1992 ). Fungi of this group can be readily grown in the laboratory on cheap nutrients and the wall material can be recovered by simple chemical procedures (McGahren et al, 1984 ).…”

Section: Polysaccharide Productionmentioning

confidence: 99%

Biotechnological Applications of Dimorphic Yeasts

Doiphode

Joshi

Ghormade

et al. 2009

Yeast Biotechnology: Diversity and Applications

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Section: Polysaccharide Productionmentioning

confidence: 99%

Biotechnological Applications of Dimorphic Yeasts

Doiphode

Joshi

Ghormade

et al. 2009

Yeast Biotechnology: Diversity and Applications

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“…The degree of deacetylation (DD), i.e., the average number of-glucosamine units per 100 monomers, expressed as a percentage, influences chemical, physical and biological properties of chitosan [1,2], such as the tensile strength of films, ability to chelate metal ions [3], and immunoadjuvant activity [4,5]. Many methods have been used to determine the DD of chitosan.…”

Section: Introductionmentioning

confidence: 99%

A novel titration method based on fiber-optic refractive index sensing for the determination of deacetylation degree of chitosans

Tan

Meng

et al. 2012

Polym. Bull.

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We describe a novel method for determining the degree of deacetylation (DD) of chitosans from fiber-optic measurements of refractive index. Theory analyses and the experimental setup of the method are introduced and discussed. The analytical performance of the method is described for the determination of alkaline titration end-points. Experimental results reveal that the equivalence point can be directly identified from the titration curve. The proposed method is simple, low-cost, accurate, reliable, and easy to operate for industrial application. The DD values of four chitosan samples obtained with this new method show good agreement with those yielded from 1 H NMR. Such a mechanism of refractive-index monitor should open up a new application in the field of chitosanolytic enzymes, such as chitosanase, pectinase that are important in bioprocesses.

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“…Several yeasts and filamentous fungi, for example, Saccharomyces cerevisiae, Absidia spp., Mucor rouxii, Mucor spp., Neurospora crassa, Rhizopus spp. have been reported as containing chitin and chitosan in their cell wall and septa [8][9][10]. Fungi are easily grown, produce high yields of biomass and extensively used in a variety of industrial fermentation processes.…”

Section: Introductionmentioning

confidence: 99%