1. Identify the major interaction (pick one) from the following list: - Hydrophobic interactions - Electrostatic attraction - Electrostatic repulsion - Hydrogen bonding - van der Waals interactions Albumin (pI5) is adsorbing to Teflon surface (uncharged, contact angle =115) at pH5. (a) What is the major interaction for this adsorption process? (b) What is the major interaction between albumin and Teflon surface if you change the pH to 7.2? (c) What is the major interaction of Albumin on highly sulfonated silica (charged, contact angle =10 ) with the buffer at pH7.2