September
2013
Volume
90
Number
5
Pages
439
—
444
Authors
Duy Michael
Le
,
1
Peter
Fojan
,
1
Elisabeth
Azem
,
2
Dan
Pettersson
,
3
and
Ninfa Rangel
Pedersen
3
,
4
Affiliations
Department of Physics and Nanotechnology, Aalborg University, 9220 Aalborg, Denmark.
DSM Nutritional Products, Animal Nutrition & Health, 4002 Basel, Switzerland.
Department of Feed Applications, Novozymes A/S, 2880 Bagsværd, Denmark.
Corresponding author. Department of Feed Applications, Novozymes A/S, 314 Feed Applications, Building 8G1.01, 2880 Bagsværd, Denmark. Phone: +45 44460618. E-mail: nrp@novozymes.com
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RelatedArticle
Accepted March 28, 2013.
Abstract
ABSTRACT
A fluorescence microscope was used for visualization of the anticaging effect of a commercial xylanase on milled wheat, microtome cuts of wheat grains, and digesta samples obtained from piglets 1 or 4 h after feeding a wheat-based diet (wheat 490 g/kg of diet, barley 100 g/kg of diet, and oats 100 g/kg of diet). Both starchy endosperm and aleurone cell walls were shown to be broken down by Ronozyme WX commercial xylanase. Data obtained by fluorescence microscopy was supplemented with measurements of starch and xylose released as a result of degradation of nonstarch polysaccharides by the xylanase. The results visualize and provide evidence that Ronozyme WX commercial xylanase can overcome the so-called cage effect. This release of nutrients from their encapsulation in cereal cell wall structures has positive impact on nutrient digestibility and partially explains the positive effect of xylanase supplementation on livestock performance.
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© 2013 AACC International, Inc.