Evaluation of the hydrocolloid extraction yield
Lallemantia royleana seed by image analysis method
of
B. Emadzadeh, Seyed M.A. Razavi, A. Mohammad Amini
Department of Food Science and Technology, Ferdowsi University of Mashhad, PoBox:
91775-1163, Iran.
Abstract
Lallemantia royleana is a mucilaginous endemic plant which is growing in different regions of
European and Middle Eastern countries, especially in Iran. This seed contains a large
amount of mucilaginous gum with inherent capacity for being used instead of the present
commercial gums. An optimized aqueous extraction process is used for the removal of the
mucilage from the whole seed. At the preparation steps of extraction process, the seeds are
swollen and the size increasing can be evaluated as a yield extraction criterion. However,
the sticky mucilage presented on these seeds cause major difficulties in dimension
measurement. In the present study, the seed size variation as a function of extraction
parameters (temperature and water/seed ratio) were investigated using the image analysis
technique. A mathematical model was also developed and shown to fit the mucilage layer
thickness during water sorption.
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