Research on the Expression of Porcine Circovirus Capsid Protein in the Bacillus subtilis Isolation,Culture and Characterization of Derived Cells from Neonatal Porcine Bone Marrow Mesenchymal Stem Cells Construction of Eukaryotic Expression Vector for the CD151 and CD163 Receptor Proteins of Porcine Reproductive and Respiratory Syndrome Virus FST-related Genes Expression in FST Gene Knock-down Pig Fetal Fibroblast Cells Development of EvaGreen Real-time Fluorescence Quantitative Polymerase Chain Reaction to Detect Porcine Circovirus Type 2 Expression of Synthetic Porcine Alpha-Lactalbumin in Transgenic Arabidopsis Effect and mechanisms of Shenmai injection on contractions of porcine coronary artery