1. a Drug Delivery Division, Center of Excellence in Polymer Science, Karnatak University, Dharwad 580 003, India
2. b Department of Chemistry, S.K. University, Anantapur 515 003, India
3. c Drug Delivery Division, Center of Excellence in Polymer Science, Karnatak University, Dharwad 580 003, India
4. d Department of Chemistry, S.K. University, Anantapur 515 003, India
5. e US Environmental Protection Agency, Cincinnati, OH, USA
6. f UT Southwestern Medical Center, Dallas, TX 75390-9058, USA
7. g Drug Delivery Division, Center of Excellence in Polymer Science, Karnatak University, Dharwad 580 003, India