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 534668
Title A comprehensive look at the effect of processing on peanut (Arachis spp.) texture
Author(s) Lykomitros, Dimitrios; Boer, Lara Den; Hamoen, Remco; Fogliano, Vincenzo; Capuano, Edoardo
Source Journal of the Science of Food and Agriculture 98 (2018)10. - ISSN 0022-5142 - p. 3962 - 3972.
Department(s) FBR Food Technology
FBR Bioconversion
Food Quality and Design
Publication type Refereed Article in a scientific journal
Publication year 2018
Keyword(s) Maceration - Melanoidins - Microstructure - Peanut - Texture - X-ray tomography
Abstract BACKGROUND: Relationships between process and peanut texture have only been studied in Hypogaea species, and focused on very limited processing conditions. In this study, 94 samples were prepared from a combination of 12 raw materials (Arachis hypogaea and fastigiata cultivars) and 11 roasting conditions (maceration in water, aqueous glucose and at different pH values followed by frying or baking). Texture was analyzed by a trained sensory panel (spectrum method) and large deformation compression tests (TA/XT2), and the microstructure probed with confocal microscopy and X-ray tomography. RESULTS: The impact of maceration on 'crispy', 'crunchy' and 'hardness' sensory attributes was significantly larger when adding glucose in this step, whereas the effect of pH was minor. The relationship held for both fried and baked peanuts as well as for both A. hypogaea and fastigiata subspecies. The degree of alveolation was similar in differently processed peanuts, even though sensory attributes were significantly different. CONCLUSIONS: Maceration in different media can yield large textural changes in both peanut species, for both baking and frying. Maceration in glucose solutions can induce much larger textural changes than maceration in water. Quantitative data on alveolation show that microstructure disruption through steam generation cannot explain all the texture differences among processed peanuts.
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