Digestibility

Effects of different protein sources in low-phosphorus diets on calculated basal endogenous loss of phosphorus by growing pigs

Nelson, M. E., S. A. Lee, H. H. Stein. 2024. Effects of different protein sources in low-phosphorus diets on calculated basal endogenous loss of phosphorus by growing pigs. Animal Feed Science and Technology 310, 115927, doi.org/10.1016/j.anifeedsci.2024.115927 Link to full text.

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Standardized ileal digestibility of amino acids and metabolizable energy in three sources of high-protein corn distillers dried grains fed to weanling pigs

Ruiz-Arias, N. C., S. A. Lee, H. H. Stein. 2024. Standardized ileal digestibility of amino acids and metabolizable energy in three sources of high-protein corn distillers dried grains fed to weanling pigs. Animal Feed Science and Technology 313, 115985. doi.org/10.1016/j.anifeedsci.2024.115985 Link to full text.

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Effects of increasing dietary protein on standardized ileal digestibility of amino acids in diets fed to growing pigs

Apparent ileal digestibility (AID) of amino acids (AA) is affected by dietary AA levels because of different contributions of endogenous AA to the ileal digesta from pigs fed diets with different levels of AA. Because of the influence of dietary protein and AA on calculated values for AID, values for AID obtained in individual feed ingredients are not always additive in mixed diets. Therefore, values for standardized ileal digestibility (SID) of AA, which are corrected for the basal ileal endogenous losses of AA, are used in diet formulations to avoid the influence of endogenous AA on digestibility values, and SID values are, therefore, additive in mixed diets.

When the direct procedure is used to determine AA digestibility, diets containing cereal grains are sometimes formulated to contain AA below the requirement. In contrast, if the SID of oilseed meals or other protein-rich ingredients are determined, concentrations of AA may be at or above the requirement. Because the influence of the basal endogenous losses of AA is eliminated in the calculations of SID values, it is assumed that values for SID are not influenced by dietary concentrations of AA. However, to our knowledge this hypothesis has not been experimentally verified, but it is an important question because it may influence how diets used in digestibility experiments are formulated. Therefore, four experiments were conducted to test the hypothesis that the SID of AA by growing pigs is not influenced by dietary AA levels.

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Influence of a novel phytase on Ca and P digestibility in diets fed to sows in late-gestation and lactation

Espinosa Charmaine D., Leidy J. Torres-Mendoza, Jonathan R. Bergstrom, Hans H. Stein. 2024. Influence of a novel phytase on Ca and P digestibility in diets fed to sows in late-gestation and lactation. Animal Feed Science and Technology 309 (2024) 115906. doi.org/10.1016/j.anifeedsci.2024.115906. Link to full text.

Effects of microbial phytase on standardized total tract digestibility of phosphorus in feed phosphates fed to growing pigs

Lopez, Diego A., Su A. Lee, Hans H. Stein. 2022. Effects of microbial phytase on standardized total tract digestibility of phosphorus in feed phosphates fed to growing pigs. J. Anim. Sci. Vol 100, Issue 12, skac350, doi.org/10.1093/jas/skac350. Link to full text.

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Interactive effects of reducing particle size and extrusion on energy digestibility and concentrations of digestible energy and metabolizable energy in corn fed to young pigs

Particle size reduction in cereal grains often results in an improved digestibility of starch due to increased surface area of grains, which subsequently increases the interaction with digestive enzymes. Improvement in the apparent total tract digestibility (ATTD) of gross energy (GE) upon particle size reduction has also been demonstrated in corn and a number of other ingredients when fed to weanling or growing-finishing pigs.

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In vitro digestibility of plant-based protein foods and ingredients using the INFOGEST workflow vs standardised values in growing pigs

Gomez-Marin, Cristina, Hans H. Stein, Natalia S. Fanelli, Beatriz Miralles, Isidra Recio. 2023. In vitro digestibility of plant-based protein foods and ingredients using the INFOGEST workflow vs standardised values in growing pigs. International Symposium Dietary Protein for Human Health. Utrecht, The Netherlands Sep 2023. Pag 90. Link to Abstract.

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Estimates of Requirements for Digestible Ca by Growing Pigs

Stein, H. H. 2023. Estimates of Requirements for Digestible Ca by Growing Pigs. Proc. 22nd Annual Midwest Swine Nutrition Conf. Danville, IN, Sep. 8, 2023. Pages 13-17. Link to full text.

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Does xylanase impact gestating, lactating sow digestibility?

Acosta, J. P., and H. H. Stein. 2023. Does xylanase impact gestating, lactating sow digestibility? National Hog Farmer. On-line edition. Dec. 21, 2023.

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Effects of Microbial Phytase on Standardized Total Tract Digestibility of Phosphorus in Feed Phosphates Fed to Growing Pigs

Lopez Diaz, Diego A., Su A Lee, Hans H. Stein. 2023. Effects of Microbial Phytase on Standardized Total Tract Digestibility of Phosphorus in Feed Phosphates Fed to Growing Pigs. J. Anim. Sci., Volume 101, Issue Supplement_2, November 2023, Pages 114–115, doi.org/10.1093/jas/skad341.127. Link to full text.

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Effects of Different Protein Sources Containing Highly Digestible Phosphorus on the Basal Endogenous Loss of Phosphorus

Nelson, Megan E., Su A Lee, Hans H. Stein. 2023. Effects of Different Protein Sources Containing Highly Digestible Phosphorus on the Basal Endogenous Loss of Phosphorus. J. Anim. Sci., Volume 101, Issue Supplement_2, November 2023, Pages 80–81. doi.org/10.1093/jas/skad341.089. Link to full text.

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Determination of TMEn, standardized amino acid digestibility, and phosphorus digestibility in soybean expellers produced from a new variety soybeans fed to chickens

Cristobal, M., J. Blair, P. L. Utterback, H. H. Stein, and C. M. Parsons. 2023. Determination of TMEn, standardized amino acid digestibility, and phosphorus digestibility in soybean expellers produced from a new variety soybeans fed to chickens. Poultry Sci. 102 (E-suppl. 1): 37. Link to abstract.

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Xylanase or a stimbiotic increased growth performance and total tract digestibility of nutrients in diets for weanling pigs, but feeding sows xylanase in lactation did not influence pig growth performance after weaning

Acosta, Jessica P., and Hans H. Stein. 2023. Xylanase or a stimbiotic increased growth performance and total tract digestibility of nutrients in diets for weanling pigs, but feeding sows xylanase in lactation did not influence pig growth performance after weaning. XXXVIII Curso de especializacion FEDNA. Pag 327. Link to abstract.

 

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Effect of Microbial Phytase on Digestibility of Phosphorus in Seven Sources of Sunflower co-Products Fed to Growing Pigs

Ibagon, Jimena A., Hans H. Stein, Charmaine D. Espinosa. 2023. Effect of Microbial Phytase on Digestibility of Phosphorus in Seven Sources of Sunflower co-Products Fed to Growing Pigs. J. Anim. Sci. Volume 101, Issue Supplement 2, Pages 303–304, doi.org/10.1093/jas/skad341.345. Link to abstract.

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Endosperm Hardness in Corn Affects the Digestibility of Energy and Fiber, and Increased Drying Temperature Reduces Amino Acid Digestibility

Espinosa, Charmaine D., Joaquin Cabañas-Ojeda, Edgar Oviedo-Rondon, Hans H. Stein. 2023. Endosperm Hardness in Corn Affects the Digestibility of Energy and Fiber, and Increased Drying Temperature Reduces Amino Acid Digestibility. J. Anim. Sci., Volume 101, Issue Supplement 2, Pages 299–300, doi.org/10.1093/jas/skad341.340. Link to abstract.

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Metabolizable Energy and Amino Acid Digestibility by Growing Pigs may be Reduced if Excessive Heat is Applied During Drying of Corn

Oliveira, Maryane Sespere Faria, Leidy J. Torres-Mendoza, Markus K. Wiltafsky-Martin, Hans H. Stein. 2023. Metabolizable Energy and Amino Acid Digestibility by Growing Pigs may be Reduced if Excessive Heat is Applied During Drying of Corn. J. Anim. Sci., Volume 101, Issue Supplement 2, Pages 189–190, doi.org/10.1093/jas/skad341.208. Link to abstract.

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Concentration of Net Energy in Corn without or with Microbial Phytase Fed to Group-Housed Pigs

Rodriguez, Diego A., Su A Lee, Hans H. Stein. 2023. Concentration of Net Energy in Corn without or with Microbial Phytase Fed to Group-Housed Pigs. J. Anim. Sci. Volume 101, Issue Supplement 2, Pages 151–152, doi.org/10.1093/jas/skad341.169. Link to abstract.

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Concentrations of Digestible and Metabolizable Energy, Ileal Digestibility of Amino Acids, and Digestibility of Phosphorus in a New Variety of Soybeans Fed to Growing Pigs

Cristobal, Minoy A., Carl M. M. Parsons, Hans H. Stein. 2023. Concentrations of Digestible and Metabolizable Energy, Ileal Digestibility of Amino Acids, and Digestibility of Phosphorus in a New Variety of Soybeans Fed to Growing Pigs. J. Anim. Sci. Volume 101, Issue Supplement 2, Pages 51 - 52, doi.org/10.1093/jas/skad341.056. Link to abstract.

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Determination of digestible indispensable amino acid score (DIAAS) for salmon proteins

Protein quality has relied on methods such as PDCAAS. However, the Food and Agriculture Organization has proposed a new method called DIAAS to better assess protein quality in human foods using the pig as a model. This shift is crucial, not only for optimizing diets, but also for understanding the nutritional value of protein-rich foods. According to the DIAAS method, protein claims can only be made for foods with a score above 75. In general, animal-based foods are considered high quality proteins with score above 75 or 100, being, in most cases, complete proteins that can complement lower quality proteins such as plant-based proteins. Meats, eggs, and fish are examples of high quality proteins, however, salmon proteins are also available, and use of by-products in human consumption has been increasing due to their nutritional value and versatility. Novel sources of salmon proteins such as salmon hydrolysate that may be used in human nutrition have been developed. Salmon hydrolysate proteins contain more than 68% crude protein (CP) and are highly digestible food ingredients, but limited information demonstrating the protein quality of these products is available. Therefore, the objectives of this study were to determine the standardized ileal digestibility (SID) of amino acids (AA) and the digestible indispensable amino acid score (DIAAS) for salmon proteins when fed to growing pigs.

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