281	Change in Hepatocellular Phosphorus Content during the Transition Period in Dairy Cows W. Gruenberg1, R. Staufenbiel2, P. Constable1, H. Dann1, J. Drackley1 1United States, 2Germany

282	Effect of Vitamin D on the Bone Metabolism of Dairy Cattle with Hypophosphstemia J. T. Wang, J. L. Li, S. W. Xu, F. Q. Shi China

283	Changes T3 and T4 Plasma Concentrations in Dairy Cows during Lactation K. Sinka, J. Illek, D. Kumprechtova, P. Novak Czech Republic

284	Predictive Value of Serum Biochemical Analysis on Treatment Outcome in 72 Recumbent Cows J. Berchtold1, H. Maier1, P. Constable2 1Germany, 2United States

285	Abnormal Dynamic Changes of Plasma Leptin are Associated with the Occurrence of Sub-clinical Ketosis in Dairy Cows around Parturitions B. He, J. Huang, T. Hu, Y. Liao, Y. Du, J. Ma, G. Li China

286	Flying Scapulas as a Symptom of Muscular Dystrophy in Dutch Dairy Heifers K. Jobse, R. Bouwstra, M. Holzhauer The Netherlands

287	Total Lipid and Triacylglycerol Determination in One Analytical Approach in Small Amounts of Bovine Hepatic Tissue R. Busche, A. Haudum, A. Starke, J. Rehage Germany

288	Study on the Mechanism in the Damage of Erythrocyte Membrane in Low-phosphorus Cows S. W. Xu, F. Q. Shi, D. W. Xuan China

289	Prevalence of Digital Dermatitis in First Lactation Cows Presented at Auction M. Hulek, I. Sommerfeld-Stur, J. Kofler Austria