Information
University of Illinois
Hans H. Stein is a professor of Animal Science at the University of Illinois, Urbana-Champaign, where he is conducting research and providing outreach programs in the area of intestinal physiology and feed ingredient evaluation. Previous jobs include positions as assistant and associate professor at South Dakota State University, jobs in the feed industry, and jobs in primary agricultural production. He obtained a PhD degree in monogastric nutrition from the University of Illinois, and a Masters degree from the Royal Veterinary and Agricultural University in Copenhagen, Denmark.
Location: Illinois, United States
Article published the April 13, 2026
INTRODUCTIONβ-mannans are plant cell wall polysaccharides of D-mannose units linked by β-(1-4) glycosidic bonds (Lee and Brown, 2022). β-mannans are a complex carbohydrate and may consist of a long chain of only mannose units or a chain of mannose units with side chains of α-1,6-linked galactose or glucose residues, resulting in galactomannans or galactoglucomannans, respectiv ...
Article published the April 13, 2026
Values for digestible energy (DE) and metabolizable energy (ME) in feed ingredients are usually determined in growing pigs and subsequently applied to all groups of pigs. Results of recent re search, however, indicates that the energy concentration of soy bean meal (SBM) is greater than previously thought when fed to growing pigs (Sotak-Peper et al., 2015; Lopez et al., 2020; Lee et al., 2021). Th ...
Article published the April 13, 2026
1. IntroductionRye (Secale cereale L.) is a versatile cereal crop that is widely cultivated and known for its high winter hardiness and high drought and stress tolerance, suitable for infertile, acidic, or sandy soils (Miedaner and Laidig, 2019). These conditions make rye a major crop in Northern Europe, with 7.63 million metric tons being produced in 2023, and approximately 12.4 million metric to ...
Article published the November 20, 2025
1. IntroductionReducing the particle size of cereal grains increases the digestibility of starch and energy by pigs (Huang et al., 2015; Rojas and Stein, 2015; Lee et al., 2024) and it is likely that surface area of grain particles and interactions between particles and digestive enzymes are increased by reducing particle sizes. In contrast to the demonstrated improvement in the digestibility of ...
Article published the September 16, 2024
Introduction:Airborne transmission of Porcine Reproductive and Respiratory Syndrome Virus (PRRSV) has been known for a long time. Most experiments were performed using type 2 PRRSV and fairly little information is available on the spread of type 1 PRRSV via aerosols. The aim of this study was to compare 3 different air sampling systems for their ability to detect aerosolized type 1 PRRS modified l ...
Article published the August 13, 2024
Introduction: Effects of 5 to 150 ppm gaseous ammonia onto respiratory health and production data in pigs have been described in literature with varying results. Ammonia is known to cause oxidative stress in epithelial cells, to irritate nociceptors and to disturb the mucocillary clearance. In addition, a pH-shift within the epithelial lining fluid covering the airways with the consequence of an e ...
Article published the September 5, 2022
IntroductionFeed cost represents 70% of the total cost of poultry and pork production (Patience et al., 2015); therefore, a number of processing techniques have been developed to maximize utilization of nutrients in feed ingredients and diets for optimum animal growth performance. Oilseed meals are commonly exposed to varying degrees of heat to remove solvents used during oil extraction, increase ...
News published on September 10, 2021
This virtual seminar will take place via Zoom meetings in four days (20, 27, 29, and 30th of September, 2021), from 16:00 to 18:30 (Spain time). All the conferences will be given in English and there will be simultaneous translation to Spanish. The seminar will be free of charge and the participants are sponsored by USSEC (Project # U21CXWW004-01).
You can register here
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Participation in Forum on April 9, 2021
Thank you Dr. Mroz. You likely know a lot more about Trp and stress than I do. But in some of our experiments with corn protein we demonstrated a close relationship between elevated concentration of Leu in the diet and reduced serotonin in the hypothalamus. This reduction can be partly overcome by adding more Trp to the diet. Because all corn proteins including DDGS have high concentrations of Leu ...
Article published the March 11, 2021
Two experiments were conducted to test the hypothesis that different combinations of conditioning and expansion of soybean expellers increases nutritional value. Non-heat-treated soybean expellers (L-1) and soybean expellers conditioned for 60 s at 90ºC followed by expansion at 110ºC (L-2) were used. Two additional sources of soybean expellers (L-3 and L-4) were processed as L-2 ...