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ADSA Pioneer

Struggles for scientists: Communication, integrity, and societal responsibilities. B. R. Baumgardt, West Lafayette, IN.

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Calcium homeostasis, acid-base balance, and health status in periparturient Holstein cows fed diets with low cation-anion difference. W. X. Wu1,2, J. X. Liu*1, G. Z. Xu1, and J. A. Ye1, 1Institute of Dairy Sciences, Ministry of Education Key Laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou, China, 2College of Animal Science, Guizhou University, Guiyang, China.

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Dietary Na:K ratio effect on milk performance and mineral metabolisms in mid-lactation cows during summer. W. Hu* and L. Kung, Jr., University of Delaware, Newark.

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Fertilization using potassium chloride decreased the DCAD of timothy hay. M. Oba*1, R. Hohm2, R. McKenzie2, and T. Dow2, 1University of Alberta, Edmonton, AB, Canada, 2Alberta Agriculture and Food, Lethbridge, AB, Canada.

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Timothy hay differing in DCAD value affected Ca homeostasis in periparturient dairy cows. M. Oba*1, G. B. Penner1, G. F. Tremblay2, and T. Dow3, 1University of Alberta, Edmonton, AB, Canada, 2Agriculture and Agri-Food Canada, Québec, QC, Canada, 3Alberta Agriculture and Food, Lethbridge, AB, Canada.

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514

Effects of hypocalcemia at calving on intake, behavior and 305 milk production. J. M. Huzzey1, T. F. Duffield2, S. J. LeBlanc , D. M. Veira3, D. M. Weary1, and M. A. G. von Keyserlingk*1, 1University of British Columbia, Vancouver, Canada, University of Guelph, Ontario, Canada, 3Pacific Agri-Food Research Centre, Agassiz, BC, Canada.

2 2

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Strong ion concentrations in ruminal fluid of lactating dairy cows fed diets varying in fermentibility. C. S. Mooney* and M. S. Allen, Michigan State University, East Lansing.

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Feed efficiency of lactating dairy cows is related to dietary energy density. D. P. Casper*1 and D. R. Mertens2, 1Agri-King,

Brake*, E. O. Oviedo-Rondon, P. W. Plumstead, K. E. Brannan, N. Leksrisompong, and J. H. Small, North Carolina State University, Department of Poultry Science, Raleigh.

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The effect of flock age and egg storage period on organ development and broiler performance. A. Afsar , O. Elibol1, and J. T. Brake*2, 1Faculty of Agriculture, Department of Animal Science,Ankara University, Ankara, Turkey, North Carolina State University, Department of Poultry Science, Raleigh.

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Optimizing brooding temperatures for large high yield broilers. E. O. Oviedo-Rondón*, M. J. Wineland, S. Funderburk, H. Cutchin, and J. H. Small, Department of Poultry Science, North Carolina State University, Raleigh.

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Influence of photoperiods and light intensities meeting American and European guidelines on broiler performance. R. J. Lien*, J. B. Hess, and L. M. Stevenson, Auburn University, Auburn, AL.

Ruminant Nutrition Acid:Base Balance/Metabolism - Dairy Chair: William Sanchez, Diamond V Mills, Inc. 217 B

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Gene expression in adipose tissue of the dairy cow during late pregnancy and lactation fed control diets or diets with supplemental chromium: integration of gene expression into metabolic models. J. P. McNamara*1, J. M. Sumner1, J. L. Vierck1, and A. Jourdan2, 1Washington State University, Pullman, 2Kemin Industries, Inc., Des Moines, IA.

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Evaluation of acute phase reactants and indices of liver function in serum from dairy cows fed different levels of energy prepartum. N. A. Janovick Guretzky*1, H. M. Dann1, M. Bionaz1, E. Trevisi2, G. Bertoni2, and J. K. Drackley1, 1University of Illinois, Urbana, 2Universita Cattolicà del Sacro Cuore, Zootecnica, Piacenza, Italy.

Inc., Fulton, IL, 2USDA-ARS Dairy Forage Research Center, Madison, WI.

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The relevance of milk components for the assessment of the energy, protein and structure balance of Holstein Friesian cows. M. Kaske*1,2, S. Seggewiss2, K. Horstmann2, M. Spolders3, and U. Meyer3, 1Physiology Weihenstephan, Technical University Munich, 2Clinic for Cattle, University of Veterinary Medicine Hannover, 3Institute of Animal Nutrition, Federal Agricultural Research Centre Braunschweig.

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F a c t o r s a f f e c t i n g m i l k u r e a n i t r o g e n i n d a i r y c a t t l e . J . R a m Í r e z * 1 , D . L e f e b v r e 2 , a n d K . M . W a d e 1 , 1 M c G i l l U n i v e r s i t y ,

Montreal, QC, Canada, 2Valacta, Ste. Anne de Bellevue, QC, Canada.

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