Research and Reviews: Dairy 2001

Special Circular 182-01

Editor
Maurice L. Eastridge

Assistant Editors
Wayne L. Bacon
C. Lynn Knipe
David L. Meeker
Thomas B. Turner
David L. Zartman

Contents

Forward

Undergraduate Program

Graduate Program

Faculty

Milk Fat - Itıs Good for You!
Donald L. Palmquist

• Introduction
• Milk Fat Composition
• Synthesis of Milk Fat
• Long Chain Fatty Acids
• Ruminal Biohydrogenation
• Physical Structure of Milk Fat
• Nutritional and Health Aspects of Milk Fat
• Health Aspects of New Developments in Milk Fat Research
• What About the Future?
• References

Factors Affecting the Production of Conjugated Linoleic Acid in Dairy Cows
X. Qiu, M. L. Eastridge , and J. L. Firkins

• Abstract
• Introduction
• Materials and Methods
  • Experiment 1
  • Experiment 2
• Results and Discussion
  • Experiment 1
  • Experiment 2
• Conclusions
• References

Conjugated Linoleic Acid in Milk from Cows on Pasture
M. L. Eastridge and X. Qiu

• Abstract
• Introduction
• Materials and Methods
• Results and Discussion
• Summary
• Acknowledgements
• References

Roasted Soybeans and Oxidized Flavor of Milk
J.S. Timmons*, W.P Weiss , D.L. Palmquist, and W.J. Harper

• Abstract
• Introduction
• Materials and Methods
• Results and Discussion
• Conclusions
• Acknowledgements

Effect of Supplemental Dietary Biotin on Performance of Holstein Cows in Early Lactation
C.A. Zimmerly and W.P. Weiss

• Abstract
• Introduction
• Materials and Methods
• Results and Discussion
• Conclusions
• References

Effectiveness of Whole Cottonseeds and Wet Brewers Grains to Replace Forage in Dairy Rations
J.L. Firkins, D.I. Harvatine, S. Ivan, and M.L. Eastridge

• Introduction
  • Whole Linted Cottonseeds and Chewing
  • Whole Cottonseeds Affect Rumen Fill and Passage Rate
  • Easiflo Cottonseed
  • Wet Brewers Grains
• Materials and Methods
• Results and Discussion
• References

Effects of Two Sources of Calcium Soaps on Performance of Lactating Cows
M. L. Eastridge and X. Qiu

• Abstract
• Introduction
• Materials and Methods
• Results and Discussion
• Summary
• Acknowledgement
• References

Environmental Conditions within Tunnel-Ventilated and Naturally Ventilated Dairy Freestall Facilities
Richard Stowell, Curt Gooch, and Scott Inglis

• Summary
• Introduction
• Materials and Methods
  • Instrumentation
  • Data Collection
• Results and Discussion
  • Overall Temperature Comparison
  • Temperature-Humidity Indices
  • Spatial Variation
  • Airspeed Comparisons
• Conclusions
• Acknowledgement

Mastitis Fads and Fashions
Joe Hogan and K. Larry Smith

• Abstract
• Introduction
• Fads
  • Barrier Teat Dips with Germicides
  • Selective Dry Cow Therapy
  • Disinfecting Organic Bedding
  • Dry Cow Barrier Teat Dips
  • Spraying Teat Disinfectants
• Fashions
  • Sand Bedding
  • Improved Dry Cow and Maternity Housing
  • Micronutrients
  • Coliform Mastitis Vaccines
• Conclusions

Troubleshooting Mastitis Problems
Joe Hogan and K. Larry Smith

• Abstract
• Introduction
• Identifying the Problem
• Current and Previous Conditions
• Conclusions

Efficacy of Immunization with Ferric Citrate Receptor (FecA) Against Clinical Coliform Mastitis
K. Takemura, J. Lin, K. L. Smith, and J. S. Hogan

• Abstract
• Introduction
• Materials and Methods
• Results
• Discussion

Characteristics and Management Practices of Herds Enrolled on Official Dairy Herd Improvement Association (DHIA) Testing Programs in Nine Ohio Counties
M.L. Khaitsa, K.H. Hoblet, K. L. Smit , T.E. Wittum, and J.L.Henderson

• Abstract
• Introduction
• Materials and Methods
• Results
  • General Information and Farm Characteristics
  • Milking Facility and Milking Procedure
  • Udder Health
  • Nutrition
• General Management
  • Housing
  • Reproduction
  • Other Management Practices
  • Herd Characteristics/Management Practices and Their Relationship to Milk Production
• Discussion
• Conclusion
• References