World's Best Scientists 2026 revealed!

D-Index & Metrics

Animal Science and Veterinary

D-Index
55
Citations
9813
World Ranking
456
National Ranking
34

Overview

What is he best known for?

The fields of study he is best known for:

  • Internal medicine
  • Enzyme
  • Food science

Henry L. Classen mostly deals with Food science, Broiler, Animal science, Feed conversion ratio and Canola. His Food science research is multidisciplinary, incorporating elements of Hydrolysis, Biochemistry, Carbohydrate, Incubation and Colony-forming unit. The Broiler study combines topics in areas such as Small intestine, Viscosity, Nutrient density and Body weight, Weight gain.

His Animal science study combines topics in areas such as photoperiodism, Incidence and Agronomy. In his study, Ageing, Nutrient digestibility and Dietary fat is strongly linked to Glucanase, which falls under the umbrella field of Feed conversion ratio. His Canola research incorporates themes from Meal and Phytic acid.

His most cited work include:

  • Reduction of intestinal viscosity through manipulation of dietary rye and pentosanase concentration is effected through changes in the carbohydrate composition of the intestinal aqueous phase and results in improved growth rate and food conversion efficiency of broiler chicks. (378 citations)
  • The effect of minerals and mineral chelators on the formation of phytase-resistant and phytase-susceptible forms of phytic acid in solution and in a slurry of canola meal (200 citations)
  • The effect of pelleting, salt, and pentosanase on the viscosity of intestinal contents and the performance of broilers fed rye. (197 citations)

What are the main themes of his work throughout his whole career to date?

His primary areas of investigation include Broiler, Animal science, Food science, Feed conversion ratio and Meal. His research integrates issues of Starch, Ascites, Veterinary medicine, Weight gain and Ileum in his study of Broiler. His Animal science research also works with subjects such as

  • photoperiodism which connect with Endocrinology,
  • Cultivar and related Enzyme supplementation.

Henry L. Classen combines subjects such as Biochemistry and Phytase with his study of Food science. The various areas that Henry L. Classen examines in his Feed conversion ratio study include Glucanase, Whole wheat and Gizzard. His Meal study integrates concerns from other disciplines, such as Amen and Extraction.

He most often published in these fields:

  • Broiler (47.31%)
  • Animal science (38.92%)
  • Food science (30.54%)

What were the highlights of his more recent work (between 2016-2021)?

  • Animal science (38.92%)
  • Broiler (47.31%)
  • Feed conversion ratio (21.56%)

In recent papers he was focusing on the following fields of study:

His primary areas of study are Animal science, Broiler, Feed conversion ratio, Digestion and Food science. The study incorporates disciplines such as Body weight and Analysis of variance in addition to Animal science. His studies in Broiler integrate themes in fields like Beta-glucan, Colonization, Gastrointestinal tract, Coccidiosis and Ileum.

He works mostly in the field of Digestion, limiting it down to topics relating to Starch and, in certain cases, Cultivar. His Food science research incorporates elements of Polyamine, Phosphate, Digestive tract and Phytase. His research in Amen intersects with topics in Internal medicine, Dietary nutrients and Endocrinology.

Between 2016 and 2021, his most popular works were:

  • Diet energy and feed intake in chickens (31 citations)
  • Development of an in vitro protein digestibility assay mimicking the chicken digestive tract. (15 citations)
  • Phytate degradation in gnotobiotic broiler chickens and effects of dietary supplements of phosphorus, calcium, and phytase. (9 citations)

In his most recent research, the most cited papers focused on:

  • Internal medicine
  • Enzyme
  • Biochemistry

The scientist’s investigation covers issues in Digestion, Animal science, Feed conversion ratio, Corn gluten meal and Food science. His Digestion study deals with Starch intersecting with Cultivar, Polysaccharide and Starter. His study in Animal science is interdisciplinary in nature, drawing from both Endocrinology and Internal medicine.

His Feed conversion ratio study incorporates themes from Analysis of variance, Starch digestion and Broiler. His Corn gluten meal research is multidisciplinary, incorporating perspectives in Meat and bone meal and Feather meal. Henry L. Classen merges Food science with Inositol phosphate in his research.

Best Publications

  • Reduction of intestinal viscosity through manipulation of dietary rye and pentosanase concentration is effected through changes in the carbohydrate composition of the intestinal aqueous phase and results in improved growth rate and food conversion efficiency of broiler chicks.

    Michael R. Bedford;Henry L. Classen

  • The effect of pelleting, salt, and pentosanase on the viscosity of intestinal contents and the performance of broilers fed rye.

    M. R. Bedford;H. L. Classen;G. L. Campbell

  • The effect of minerals and mineral chelators on the formation of phytase-resistant and phytase-susceptible forms of phytic acid in solution and in a slurry of canola meal

    David D Maenz;Carmen M Engele-Schaan;Rex W Newkirk;Henry L Classen

  • An In Vitro Assay for Prediction of Broiler Intestinal Viscosity and Growth When Fed Rye-Based Diets in the Presence of Exogenous Enzymes

    M. R. Bedford;H. L. Classen

  • Phytase activity in the small intestinal brush border membrane of the chicken

    DD Maenz;HL Classen

  • Function and nutritional roles of the avian caeca: a review

    B. Svihus;M. Choct;H.L. Classen

  • Response of chickens fed on hull-less barley to dietary β-glucanase at different ages

    M.E. Salih;H.L. Classen;G.L. Campbell

  • Photoperiodic Effects on Performance and Leg Abnormalities in Broiler Chickens

    H. L. Classen;C. Riddell

  • The digestibility and content of amino acids in toasted and non-toasted canola meals

    R. W. Newkirk;H. L. Classen;T. A. Scott;M. J. Edney

  • Replacement of fishmeal by canola protein concentrate in diets fed to rainbow trout (Oncorhynchus mykiss)

    D.L. Thiessen;D.D. Maenz;R.W. Newkirk;H.L. Classen

  • Cereal grain starch and exogenous enzymes in poultry diets

    H.L. Classen

  • Effects of increasing photoperiod length on performance and health of broiler chickens

    H L Classen;C Riddell;F E Robinson

  • Growth Performance, Feed Efficiency and the Incidence of Skeletal and Metabolic Disease in Full-Fed and Feed Restricted Broiler and Roaster Chickens

    F. E. Robinson;H. L. Classen;J. A. Hanson;D. K. Onderka

  • The energy content of barley fed to growing pigs: characterizing the nature of its variability and developing prediction equations for its estimation.

    S L Fairbairn;J F Patience;H L Classen;R T Zijlstra

  • Effect of light intensity on broiler production, processing characteristics, and welfare

    A. Deep;K. Schwean-Lardner;T. G. Crowe;B. I. Fancher

  • Influence of Dietary Nutrient Density, Feed Form, and Lighting on Growth and Meat Yield of Broiler Chickens

    K. E. Brickett;J. P. Dahiya;H. L. Classen;S. Gomis

  • Genotypic and environmental differences in extract viscosity of barley and their relationship to its nutritive value for broiler chickens

    G.L. Campbell;B.G. Rossnagel;H.L. Classen;P.A. Thacker

  • The effect of dietary enzyme supplementation of rye- and barley-based diets on digestion and subsequent performance in weanling pigs

    J. F. Patience;M. R. Bedford;H. L. Classen;J. Inborr

  • The effect of β-glucanase supplementation on nutrient digestibility and growth in broilers given diets containing barley, oat groats or wheat

    M.J. Edney;G.L. Campbell;H.L. Classen

  • The effects of toasting canola meal on body weight, feed conversion efficiency, and mortality in broiler chickens

    RW Newkirk;HL Classen

  • STUDIES ON THE USE OF HULLESS BARLEY IN CHICK DIETS: DELETERIOUS EFFECTS AND METHODS OF ALLEVIATION

    H. L. Classen;G. L. Campbell;B. G. Rossnagel;R. Bhatty

  • The Impact of Nutrient Density, Feed Form, and Photoperiod on the Walking Ability and Skeletal Quality of Broiler Chickens

    K. E. Brickett;J. P. Dahiya;H. L. Classen;C. B. Annett

  • Feeding broiler chickens wheat and barley diets containing whole, ground and pelleted grain.

    CD Bennett;HL Classen;C Riddell

Frequent Co-Authors

Andrew G. Van Kessel
Andrew G. Van Kessel University of Saskatchewan
Pierre Hucl
Pierre Hucl University of Saskatchewan
Brian G. Rossnagel
Brian G. Rossnagel University of Saskatchewan
F. E. Robinson
F. E. Robinson University of Alberta
J. D. Garlich
J. D. Garlich North Carolina State University
Philip A. Thacker
Philip A. Thacker University of Saskatchewan
Wilhelm Guenter
Wilhelm Guenter University of Manitoba
Birger Svihus
Birger Svihus Norwegian University of Life Sciences
M. R. Bedford
M. R. Bedford AmeriCorps VISTA
Peter R. Ferket
Peter R. Ferket North Carolina State University

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Related Online Degrees & Career Pathways

Studying Animal Science and Veterinary opens diverse career options, many of which benefit from complementary skills in human and animal health, behavior, and management. For those interested in leadership roles within sports and animal-related organizations, exploring the how to become an athletic director path can provide valuable insights into administrative and operational responsibilities.

Students might also consider online degree programs that enhance their understanding of movement and physical health. Programs in online exercise science programs offer specialized knowledge beneficial for animal trainers, rehabilitation specialists, or those interested in comparative physiology.

Behavioral aspects are also crucial in veterinary and animal science careers. For those wanting to delve deeper into behavior management, studying a behavioral analysis degree can provide techniques applicable to animal training and therapeutic interventions.

Lastly, understanding psychological principles through nasp accredited online school psychology programs can support professionals working in animal-assisted therapy or educational roles involving animals, fostering stronger human-animal connections.

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