Naresh Kalra

ABSTRACT This investigation delves into the eco-friendly production of silver nanoparticles utilizing an extract derived from Rivea hypocrateriformis leaves, serving as both a reducing and stabilizing agent. The commencement of the procedure involved validating visual assessments, showcasing the transformation in color of the reaction mixture from a light yellow hue to brown, ultimately culminating in a blackish-brown shade, serving as a clear indicator of the successful formation of nanoparticles. Characterization of the synthesized silver nanoparticles through UV-Visible spectrophotometry revealed a distinct surface plasmon resonance (SPR) band at 450 nm, confirming their metallic nature. Fourier Transform Infrared Spectroscopy (FTIR) analysis identified functional groups in both the plant extract and silver nanoparticles, providing insights into their roles in reduction and stabilization. Scanning Electron Microscopy (SEM) displayed well-separated, spherical nanoparticles with an average size ranging from 15 to 60 nm. This study establishes R. hypocrateriformis as a promising source for environmentally friendly synthesis of silver nanoparticles, opening avenues for applications in various fields, including medicine and industry. Keywords: Rivea hypocrateriformis, FTIR, SEM, etc.

ABSTRACT Thalictrum foliolosum DC is widely distributed plant in the Himalayan region extending India, Nepal, Bhutan, South East Tibet and Burma between an altitude ranges of 1000–3400 m. Within India, it was recorded in Jammu & Kashmir, Himachal Pradesh, Punjab, Uttar Pradesh, Delhi, Sikkim, Arunachal Pradesh, Meghalaya, Bihar, Orissa, Andhra Pradesh and Tamil Nadu. In traditional medicine, various parts of this plant, including its bark, stems, and leaves, have been employed to address a range of health concerns, such as malaria, cancer, mental disorders, and pain relief. This study aimed to explore the qualitative and quantitative phytochemical analysis of T. foliolosum leaves. Qualitative phytochemical analysis identified the presence of alkaloids, carbohydrates, flavonoids, glycosides, phenolic compounds, and tannins while the quantitative phytochemical analysis showed that ethanolic extract is richest in phenoilc and flavovonids content. This study on T. foliolosum leaves serves as a crucial diagnostic tool for species identification, and the development of quality parameters. The data obtained in this study may be regarded as a reference for future research endeavors. Keywords: Thalictrum foliolosum, phenolic content, flavonoid content, qualitative analysis, qualitative analysis, etc.