Article (Scientific journals)
Quality characteristics of sesame seeds and by-products
Elleuch, Mohamed; Besbes, Souhail; Roiseux, Olivier et al.
2007In Food Chemistry, 103 (2), p. 641-650
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Keywords :
chemical composition; raw sesame seed; by-products; oil; oxidative stability
Abstract :
[en] The chemical composition, of raw sesame seed (RS); Sesame coats 1 (SC1) and sesame coats 2 (SC2) obtained as a by-product respectively after dehulling and roasting processes during preparation of sesame paste (tehineh) for the manufacturing of Halaweh (sweetened tehineh), was determined along with the physicochemical characteristics of the oil fraction. Compared to RS, SC1 and SC2 showed higher amounts of dietary fibre, ash and polyphenol and lower amounts of oil and protein. Oil from SC1 and SC2, had a higher content of free fatty acids, chlorophylls, polyphenols and sesamol than RS oil. SC2 oil showed more intense colour, more absorbance in UV-A, UV-B and UV-C ranges and a significant higher viscosity (P < 0.05). No differences (P > 0.05) were observed for refractive index, iodine value and fatty acids composition. This latter was essentially dominated by oleic and linoleic acids. Oxidative stability of oil was investigated using a Rancimat system and in an oven test at 65 degrees C over 60 days. RS oil was more resistant to the thermal treatment during a long period than SC1 and SC2 oils. (c) 2006 Elsevier Ltd. All rights reserved.
Disciplines :
Food science
Author, co-author :
Elleuch, Mohamed
Besbes, Souhail
Roiseux, Olivier
Blecker, Christophe ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech
Attia, Hamadi
Language :
English
Title :
Quality characteristics of sesame seeds and by-products
Publication date :
2007
Journal title :
Food Chemistry
ISSN :
0308-8146
eISSN :
1873-7072
Publisher :
Elsevier Science, Oxford, United Kingdom
Volume :
103
Issue :
2
Pages :
641-650
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 17 May 2010

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