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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 436440
Title Effects of processing technologies combined with cell wall degrading enzymes on in vitro degradability of barley
Author(s) Vries, S. de; Pustjens, A.M.; Schols, H.A.; Hendriks, W.H.; Gerrits, W.J.J.
Source Journal of Animal Science 90 (2012)supplement 4. - ISSN 0021-8812 - p. 331 - 333.
DOI http://dx.doi.org/10.2527/jas.51416
Department(s) Animal Nutrition
Food Chemistry Group
WIAS
Publication type Refereed Article in a scientific journal
Publication year 2012
Keyword(s) kinetics
Abstract Effects of processing technologies and cell wall degrading enzymes on in vitro degradation of barley were tested in a 5 × 2 factorial arrangement: 5 technologies (unprocessed, wet-milling, extrusion, autoclaving, and acid-autoclaving), with or without enzymes. Upper gastrointestinal tract digestion (Boisen incubation) and large intestinal fermentation (gas production technique) were simulated in duplicate. All technologies increased digestion of DM (13 to 43% units) and starch (22 to 51% units) during Boisen incubation, compared with the unprocessed control (P <0.01). Wet-milling, extrusion, and acid-autoclaving increased CP digestion by 29 to 33% units (P <0.01). Xylanase and ß-glucanase addition increased digestion of DM (~20% units), starch (~20% units), and CP (~10% units) in unprocessed and autoclaved barley (P <0.01). Wet-milling, extrusion, and acid-autoclaving, reduced the extent (50%) and maximum rate (60 to 75%) of fermentation (P <0.01), which appeared to reflect the reduced amount of starch present in the Boisen residues. In conclusion, wet-milling, extrusion, and acid-autoclaving improved in vitro starch and CP digestion in barley, which is related to the cell wall matrix disruption. Addition of xylanases and ß-glucanases improved in vitro starch and CP digestion only in unprocessed barley or barley poorly affected by processing.
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