Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 424121
Title Quality assessments of untreated and washed quinoa (Chenopodium quinoa) seeds based on histlogical and foaming capacity investigations
Author(s) Raamsdonk, L.W.D. van; Pinckaers, V.G.Z.; Ossenkoppele, J.S.; Houben, R.; Lotgering, M.; Groot, M.J.
Source Microscopy: Science, Technology, Applications and Education 2 (2010)4. - ISSN 0809-103X - p. 1033 - 1038.
Department(s) RIKILT - Business Unit Safety & Health
RIKILT - Analyse & Ontwikkeling
Publication type Refereed Article in a scientific journal
Publication year 2010
Abstract Quinoa seed has a high nutritional value, but has a coating of bitter-tasting saponins, making it unpalatable. Therefore the seeds are usually processed in order to remove the naturally occurring saponins from the seeds. To investigate the impact of processing, untreated and washed seeds of the white and brown types of quinoa were investigated histologically and by foaming capacity evaluations. Reference samples of known origin and treatment were investigated as well as unknown samples. The results revealed a relationship between the presence of saponin containing papillose cells at the outermost layer of the seed hull in the histological sections and the foaming capacity of the seeds. After washing, the papillose cells were severely damaged or completely removed and virtually no foam formation was observed. This investigation indicated
that washing resulted in an effective removal of the saponin layer, leading to quality improvement of the seeds intended for human and animal consumption. The same features were observed for the unknown samples. These results imply that the treatment of the investigated samples was based on washing. The determination of the type of treatment applied provided useful information for the correct tax classification for Custom purposes.
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