Spin-lattice relaxation of water protons in serum adhesion protein (SAP) solutions of ultra low concentrations

✍ Scribed by T.A. Babushkina; T.P. Klimova; I.A. Yamskov; V.P. Yamskova

• Book ID: 103835705
• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 85 KB
• Volume: 122
• Category: Article
• ISSN: 0167-7322
• DOI: 10.1016/j.molliq.2005.05.002

✦ Synopsis

Spin-lattice relaxation of water protons in serum adhesion protein (SAP) solutions of ultra low concentrations (10 À 13 , 10 À 15 , 10 À 16 , 10 À 17 , 10 À 19 M) are investigated in the temperature range 288 -330 K. It is shown that the Arrenius equation with two activation energies describes the experimental function T 1 = f(T). The activation energies of water proton motion for all studied solutions and for clean water have close values in the temperature range of 305 -330 K. But the activation energies of the water proton motion for SAP solutions with concentrations 10 À 13 , 10 À 15 , 10 À 16 , 10 À 19 M in the temperature range of 288 -303 K are very different from those for clean water. We suppose that a new structure of H-bond net induced by the influence of SAP can be the cause of the difference between the activation energies.