1. Pharmacognosy & Ethnopharmacology Division, CSIR-National Botanical Research Institute, Lucknow, UP, India
2. Biochemistry Department, Tocklai Experimental Station, Tea Research Association, Jorhat, Assam, India
3. Soil Department, Tocklai Experimental Station, Tea Research Association, Jorhat, Assam, India
4. Center of Excellence in Materials Science (Nanomaterials), Z. H. College of Engineering & Technology, Aligarh Muslim University, Aligarh, UP, India