1. Department of Chemistry; Sri Krishnadevaraya University; Anantapur 515 003 India
2. Department of Polymer Science and Engineering; Pusan National University; Busan 609-735 Korea
3. Department of Chemistry; Yogi Vemana University; Kadapa 516 003 India
4. Department of Microbiology; Sri Krishnadevaraya University; Anantapur 515 003 India
5. Department of Polymer Science and Technology; Sri Krishnadevaraya University; Anantapur 515 003 India