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Microwave Irradiation Induced Changes in Protein Molecular Structures of Barley Grains: Relationship to Changes in Protein Chemical Profile, Protein Subfractions, and Digestion in Dairy Cows

文献类型： 外文期刊

作者： Yan, Xiaogang 1 ; Khan, Nazir A. 1 ; Zhang, Fangyu 1 ; Yang, Ling 1 ; Yu, Peiqiang 1 ;

作者机构： 1.Univ Saskatchewan, Dept Anim & Poultry Sci, Saskatoon, SK S7N 5A8, Canada

2.Jilin Acad Agr Sci, Branch Acad Anim Sci, Gongzhuling 136100, Jilin, Peoples R China

3.Tianjin Agr Univ, Coll Anim Sci & Anim Vet, Tianjin 300384, Peoples R China

关键词： barley grain;microwave irradiation;heat processing;nutrient availability;protein molecular structure

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：5.279； 五年影响因子：5.269 ）

ISSN：

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收录情况： SCI

摘要： The objectives of this study were to evaluate microwave irradiation (MIR) induced changes in crude protein (CP) subfraction profiles, ruminal CP degradation characteristics and intestinal digestibility of rumen undegraded protein (RUP), and protein molecular structures in barley (Hordeum vulgare) grains. Samples from hulled (n =1) and hulless cultivars (n = 2) of barley, harvested from four replicate plots in two consecutive years, were evaluated. The samples were either kept as raw or irradiated in a microwave for 3 min (MIR3) or 5 min (MIR5). Compared to raw grains, MIR5 decreased the contents of rapidly degradable CP subfraction (from 45.22 to 6.36% CP) and the ruminal degradation rate (from 8.16 to 3.53%/h) of potentially degradable subfraction. As a consequence, the effective ruminal degradability of CP decreased (from 5570 to 34.08% CP) and RUP supply (from 43.31 to 65.92% CP) to the postruniinal tract increased. The MIR decreased the spectral intensities of amide 1, amide II, α-helix, and β-sheet and increased their ratios. The changes in protein spectral intensities were strongly correlated with the changes in.CP subfractions and digestive kinetics. These results show that MIR for a short period (5 min) with a lower energy input can improve the nutritive value and utilization of CP in barely grains.

  • 相关文献

[1]The inter-relationship between processing-induced molecular structure features and metabolic and digestive characteristics in hulled and hulless barley (Hordeum vulgare) grains with altered carbohydrate traits. Yan, Xiaogang,Zhang, Fangyu,Yan, Xiaogang,Zhang, Fangyu,Yu, Peiqiang.

[2]Molecular spectroscopic investigation on fractionation-induced changes on biomacromolecule of co-products from bioethanol processing to explore protein metabolism in ruminants. Zhang, Xuewei,Yu, Peiqiang,Zhang, Xuewei,Yan, Xiaogang,Yu, Peiqiang,Yan, Xiaogang,Beltranena, Eduardo.

[3]Bio-functions and molecular carbohydrate structure association study in forage with different source origins revealed using non-destructive vibrational molecular spectroscopy techniques. Ji, Cuiying,Zhang, Xuewei,Yan, Xiaogang,Ji, Cuiying,Rahman, M. Mostafizar,Prates, Luciana L.,Yu, Peiqiang.

[4]Effect of durations of microwave irradiation (3 and 5 min) on truly absorbable nutrient supply of newly developed hulless barley varieties (Hordeum vulgare L.) in comparison with conventional hulled barley variety. Yan, Xiaogang,Shi, Haitao,Zhang, Fangyu,Ying, Yuguang,Yu, Peiqiang,Yan, Xiaogang,Zhang, Fangyu,Zhang, Weixian. 2018

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