ORBi: Alchihab Mohamed - The utilization of gum tragacanth to improve the growth of Rhodotorula aurantiaca and the production of γ-decalactone in large scale

Reference : The utilization of gum tragacanth to improve the growth of Rhodotorula aurantiaca and th...


	Document type :	Scientific journals : Article
	Discipline(s) :	Life sciences : Microbiology
	To cite this reference:	http://hdl.handle.net/2268/29136

Title :	The utilization of gum tragacanth to improve the growth of Rhodotorula aurantiaca and the production of γ-decalactone in large scale
Language :	English
Author, co-author :	Alchihab, Mohamed [Université de Liège - ULg > > > Doct. sc. agro. & ingé. biol.]
	Destain, Jacqueline [Université de Liège - ULg > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech >]
	Aguedo, Mario [Université de Liège - ULg > Chimie et bio-industries > Chimie biologique industrielle >]
	Wathelet, Jean-Paul [Université de Liège - ULg > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech >]
	Thonart, Philippe [Université de Liège - ULg > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech - Biochimie et microbiologie industrielles >]
Publication date :	28-Jul-2009
Journal title :	Applied Biochemistry and Biotechnology
Publisher :	Humana Press
Peer reviewed :	Yes (verified by ORBi)
Audience :	International
ISSN :	0273-2289
City :	Totowa
Country :	NJ
Keywords :	[en] γ-Decalactone ; Gum tragacanth ; 4-Hydroxydecanoic acid ; R. aurantiaca ; Toxicity
Abstract :	[en] The production of γ-decalactone and 4-hydroxydecanoic acid by the psychrophilic yeast R. aurantiaca was studied. The effect of both compounds on the growth of R. aurantiaca was also investigated and our results show that γ-decalactone must be one of the limiting factors for its production. The addition of gum tragacanth to the medium at concentrations of 3 and 4 g/l seems to be an adequate strategy to enhance γ-decalactone production and to reduce its toxicity towards the cell. The production of γ-decalactone and 4- hydroxydecanoic acid was significantly higher in 20-l bioreactor than in 100-l bioreactor. By using 20 g/l of castor oil, 6.5 and 4.5 g/l of γ-decalactone were extracted after acidification at pH 2.0 and distillation at 100 °C for 45 min in 20- and 100-l bioreactors, respectively. We propose a process at industrial scale using a psychrophilic yeast to produce naturally γ-decalactone from castor oil which acts also as a detoxifying agent; moreover the process was improved by adding a natural gum.
Target :	Researchers ; Professionals ; Students ; General public ; Others
Permalink :	http://hdl.handle.net/2268/29136
DOI :	10.1007/s12010-009-8739-0

File(s) associated to this reference

Fulltext file(s):

	File	Commentary	Version	Size	Access
Restricted access	ABAB2.pdf	No commentary	Publisher postprint	462.17 kB	Request copy

All documents in ORBi are protected by a user license.

Dspace v1.5