1. Department of Materials Science; Mangalore University; Mangalgangothri 574 199 India
2. P. G. Department of Studies in Chemistry; Karnatak University; Dharwad 580 003 India
3. Department of Chemistry; Karnatak Science College; Dharwad 580 001 India
4. Department of Applied Botany; Mangalore University; Mangalgangothri 574 199 India
5. Department of Industrial Chemistry; Mangalore University; Mangalgangothri 574 199 India