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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Effects of pressure toasting on in situ degradability and intestinal protein and protein-free organic matter digestibility of rapeseed
Azarfar, A. ; Ferreira, C. ; Goelema, J.O. ; Poel, A.F.B. van der - \ 2008
Journal of the Science of Food and Agriculture 88 (2008)8. - ISSN 0022-5142 - p. 1380 - 1384.
heat-treatment - canola-meal - rumen - degradation - system - whole
BACKGROUND: Rapeseed is a protein supplement that contains up to 40% crude protein (CP) on a dry matter (DM) basis, but a large part of its protein can be easily degraded in the rumen. Therefore, before inclusion in ruminant's diet, the extent of its protein degradation in the rumen must be reduced without altering its intestinal digestibility. A study was conducted to investigate the effects of pressure toasting (T, 130 °C) at two residence times (1.5 and 10min) alone or in combination with soaking in water (ST, 4h) on ruminal degradability and intestinal digestibility of CP and protein-free organic matter (PFOM) in whole full-fat rapeseed. RESULTS: Regardless of the processing time (1.5 or lOmin), T significantly (P <0.05) increased the fraction of undegraded intake protein (UIP) compared to the untreated rapeseed samples. Soaking prior to further toasting did not improve the rumen degradation characteristics of rapeseed CP. Compared to the untreated rapeseed samples, both T and ST significantly (P <0.0001) improved the true protein digested in the small intestine (DVE) and degraded protein balance (OEB), effects that were more evident in samples heated for 10min. Soaking prior to pressure toasting, however, did not further improve the DVE or OEB in the rapeseed samples in comparison with T treatment. CONCLUSIONS: It was concluded that ruminal protein degradability of rapeseed decreased after pressure toasting, without seriously affecting its intestinal digestibility.
Effects of pressure toasting of barley on ruminal fermentation, amount of metabolizable starch and protein, and performance of dairy cows
Harstad, O.M. ; Norberg, E. ; Goelema, J.O. ; Tamminga, S. - \ 2002
In: Annual Meeting EAAP 2002, Book of Abstracts, Cairo, Egypt, 2002 Wageningen : Wageningen Press - p. 53 - 54.
An analysis of the nutritive value of heat processed legume seeds for animal production using the DVE/OEB model : a review
Yu, P. ; Goelema, J.O. ; Leury, B.J. ; Tamminga, S. ; Egan, A.R. - \ 2002
Animal Feed Science and Technology 99 (2002). - ISSN 0377-8401 - p. 141 - 176.
Recently obtained information on structural and compositional effects of processing of legume seeds is reviewed, in relation to legume seed characteristics affecting digestive behavior and nutrient utilization. The emphasis is on (1) manipulation of digestive behavior by heat processing methods, particularly on protein and/or starch components of legume seeds, (2) prediction of changes of potential nutrient supply to ruminants from legume seeds after heat processing, using the newly developed DVE/OEB model, and (3) obtaining information on optimal processing conditions of legume seeds as intestinal protein source in term of protein DVE and OEB values (to achieve target values for potential high net absorbable protein in the small intestine while holding any N loss in the rumen to a low level), using the protein evaluation DVE/OEB model. The information described in this paper may give better insight in the mechanisms involved and the changes occurring upon processing of legume seeds. A focus of the review is on evaluation of the models and new approaches to establishment of a protein evaluation system that more accurately accounts for digestive processes in the ruminant on a quantitative basis.
Degradability and intestinal digestibility of crude protein and crudeprotein-free organic matter from rapeseed
Ferreira, C.S.A. ; Goelema, J.O. ; Dijkstra, J. ; Poel, A.F.B. van der - \ 2001
Animal Feed Science and Technology (2001). - ISSN 0377-8401 - p. 1 - 1.
Using the DVE/OEB system to determine optimal conditions of pressure toasting on horse beans (Vicia faba) for the diary cows
Yu, P. ; Goelema, J.O. ; Tamminga, S. - \ 2000
Animal Feed Science and Technology 86 (2000). - ISSN 0377-8401 - p. 165 - 176.
Effects of pressure toasting, expander treatment and pelleting on in vitro and in situ parameters of protein and starch in a mixture of broken peas, lupins and faba beans
Goelema, J.O. ; Smits, A. ; Vaessen, L.M. ; Wemmers, A. - \ 1999
Animal Feed Science and Technology 78 (1999). - ISSN 0377-8401 - p. 109 - 126.
Processing of legume seeds : effects on digestive behaviour in dairy cows
Goelema, J.O. - \ 1999
Agricultural University. Promotor(en): S. Tamminga; G. Hof; A.F.B. van der Poel. - S.l. : Goelema - ISBN 9789058080134 - 221
melkkoeien - melkvee - peulgewassen - zaden - voer - zaadbehandeling - verwerking - pensvertering - pens - darmen - verteerbaarheid - diervoeding - voedingsfysiologie - dairy cows - dairy cattle - legumes - seeds - feeds - seed treatment - processing - rumen digestion - rumen - intestines - digestibility - animal nutrition - nutrition physiology

In this study, effects of toasting, expander treatment and pelleting on in situ rumen degradability and intestinal digestibility of legume seeds are described. Toasting decreases protein degradability of peas, lupins, faba beans and soybeans and starch degradability of peas and faba beans, especially when broken instead of whole seeds are processed. Toasting of a mixture of peas, lupins and faba beans resulted in a higher starch degradability than expected on the separately treated feedstuffs. Toasting the mixture decreased protein degradability, whereas pelleting and expander treatment increased protein degradability.

The observed effects for the latter two treatments were related to particle size reduction during processing. Combinations of toasting, expander treatment and pelleting resulted sometimes in interactions,but the order of the treatments hardly affected the effects on protein and starch degradability.

Peas and faba beans showed great resemblance in chemical composition. This was reflected in their sensititivy to the processing conditions. Likewise, lupins and soybeans showed similar behaviour after toasting. The rumen degradability of amino acids (AAN) in lupins decreased, and showed a curvi-linear response to processing time and temperature. Effects of toasting were similar for all amino acids. Correction for microbial contamination based on diaminopimelic acid resulted in a higher degradability of AAN compared to uncorrected N. Moreover, corrections affected the ranking of treatments with respect to degradability of individual amino acids.

Laboratory measurements showed that protein dispersibility index (PDI) and protein denaturation enthalpy, as measured by differential scanning calorimetry (DSC) are useful indicators for protein denaturation, and can be used for evaluation of effects of toasting on intestinal digestible rumen undegraded protein.

Monitoring the Severity of the Heat Treatment in Pressure Toasted Peas and Soybeans by Means of the Photoacoustic and NIRReflectance Spectroscopies
Doka, O. ; Bicanic, D. ; Goelema, J. ; Gerkema, E. ; Frankhuizen, R. - \ 1999
In: Photoacoustic and Photothermal Phenomena : Proceedings of the 10th Topical International Conference on Photoacoustic and Photothermal Phenomena, AIP Conference Proceedings 463, Rome, Italy, August 24-26, 1998 / Scudieri F. and BertolottiM.(eds.). - Woodburry, New York, US : American Institute of Physics Press, 1999. - ISBN 1-56396-805-3 - p. 658 - 660.
Monitoring the severity of the heat treatment in pressure toasted peas and soyabeans by means of the photoacoustic ans nir reflectance spectrocopies
Doka, O. ; Bicanic, D. ; Goelema, J. ; Frankhuizen, R. - \ 1998
In: AIP. 10th International Conference, Rome, Italy, August 1998 - p. 658 - 660.
Effecten van technologische behandelingen op pensafbraak, darmverteerbaarheid en in vitro parameters van een mengsel van erwten, lupinen en faba bonen.
Goelema, J.O. ; Smits, A. ; Vaessen, L.M. ; Wemmers, A. - \ 1998
In: Proc. 23e Studiedag Nederlandstalige Voedingsonderzoekers, Utrecht, The Netherlands, 3 april - p. 55 - 56.
De invloed van druktoasten op het verteringsgedrag van zaden van vlinderbloemigen in de pens en darmen van rundvee.
Goelema, J.O. ; Steendam, C.A. ; Yu, P. ; Boswerger, B.G.M. ; Deurzen, I. van; Roth, M.R. ; Hof, G. ; Poel, A.F.B. van der; Boer, H. ; Tamminga, S. - \ 1998
Unknown Publisher - 71 p.
Effects of pressure toasting, expander treatment and pelleting on in vitro and in situ parameters of protein and starch in a mixture of broken peas, lupins and faba beans.
Goelema, J.O. ; Smits, A. ; Vaessen, L.M. ; Wemmers, A. - \ 1998
Unknown Publisher - 24 p.
Resultaten van zeefanalyses van ongetoaste en getoaste zaden van vlinderbloemigen.
Goelema, J.O. ; Steendam, C.A. ; Yu, P. ; Boswerger, B.G.M. ; Deurzen, I. van; Roth, M.R. ; Hof, G. ; Poel, A.F.B. van der; Boer, H. ; Tamminga, S. - \ 1998
Unknown Publisher - 23 p.
Resultaten voor de pensafbraak en darmverteerbaarheid van aminozuren in lupinen.
Goelema, J.O. ; Steendam, C.A. ; Yu, P. ; Boswerger, B.G.M. ; Deurzen, I. van; Roth, M.R. ; Hof, G. ; Poel, A.F.B. van der; Boer, H. ; Tamminga, S. - \ 1998
Unknown Publisher - 25 p.
Effects of pressure toasting, expander treatment and pelleting on the rumen degradability of a mixture of broken peas, lupins and faba beans.
Goelema, J.O. ; Smits, A. ; Vaessen, L.M. ; Wemmers, A. - \ 1998
In: Proc. 3rd European Conference on Grain Legumes, AEP (Ed.), Tracodero, Paris (Publ), Valladolid, Spain 14-19 November - p. 454 - 455.
Effect of pressure toasting on the rumen degradability and intestinal digestibility of whole and broken peas, lupins and faba beans and a mixture of these feedstuffs.
Goelema, J.O. ; Spreeuwenberg, M.A.M. ; Hof, G. ; Poel, A.F.B. van der; Tamminga, S. - \ 1998
Animal Feed Science and Technology 76 (1998). - ISSN 0377-8401 - p. 35 - 50.
Photoacoustic monitoring of pressure toasting induced changes in peas and soybeans.
Doka, O. ; Bicanic, D. ; Goelema, J. - \ 1998
In: 10th International Conference on Photoacoustic and Photothermal Phenomena, Rome, Italy - p. 529 - 530.
Het effect van druktoasten op de pensafbraak en darmverteerbaarheid van zetmeel en eiwit van hele en gebroken erwten, fababonen en lupinen en van een mengsel van deze grondstoffen.
Goelema, J.O. ; Spreeuwenberg, M.A.M. ; Hof, G. ; Poel, A.F.B. van der; Boer, H. ; Tamminga, S. - \ 1997
Unknown Publisher - 34 p.
Effect of pressure toasting on the in situ degradability of broken lupins, peas and faba beans and a mixture of these feedstuffs (abstract).
Goelema, J.O. ; Spreeuwenberg, M. ; Hof, G. ; Poel, A.F.B. van der; Tamminga, S. - \ 1997
In: Proc. British Society of Animal Science, 23-25 March, Scarborough, UK - p. 122 - 122.
De effecten van druktoasten op de pensafbraak en darmverteerbaarheid van een mengsel van gebroken en ongebroken lupinen.
Goelema, J.O. ; Hof, G. ; Poel, A.F.B. van der; Tamminga, S. - \ 1997
In: Proc. 22e studiedag voor Nederlandstalige voedingsonderzoekers, Gent, 4 april - p. 32 - 33.
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