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The increasing interest in developing potent non-toxic drugs in medicine is widening the opportunities for studying the usage of nanostructures in the treatment of various diseases. The present work reports a method for a facile and an eco-friendly synthesis of silver nanoparticles (AgNPs) using Terminalia chebula fruit extract (TCE). The obtained AgNPs was characterized by using different spectroscopic and microscopic techniques. The analysis of the results revealed that the as-obtained AgNPs have spherical morphology with an average diameter of 22 nm. Furthermore, the preliminary bioactivity evaluations revealed that the bio-conjugation of AgNPs, using TCE, significantly enhanced the antibacterial and anti-breast cancer potentials of the latter. The antibacterial activity of the as-prepared AgNPs showed that B. subtilis was more sensitive towards the AgNPs, followed by P. aeruginosa; while, E. coli and S. mutans showed comparatively minimal sensitivity toward the AgNPs. The IC50 values of TCE, AgNPs and TCE + AgNPs treatment of MCF-7 were found to be 17.53, 14.25 and 6.484 µg/mL, respectively. Therefore, it can be ascertained that the bio-conjugation may provide a headway with regard to the therapeutic employment of T. chebula, upon mechanistically understanding the basis of observed antibacterial and anticancer activities.

Allantoin, a crystalline compound was isolated from the methanolic extract of Cleome viscosa and it was reported for first time from this plant. The structure of Allantoin was elucidated by single crystal XRD and it was further confirmed through FTIR and ESI-MS spectroscopy techniques. It was crystallized in monoclinic crystal system with the space group P2i/c. Electronic structure characterization of the isolated Allantoin was done through density functional theory calculation. The atomic charges, dipole moment, frontier molecular orbital and the electrostatic potential map of the molecule in the gaseous phase and in the active site have also been analyzed. The optimized geometry was used for molecular docking to identify the possible binding mode. Furthermore, the in vitro antibacterial activity of the isolated Allantoin against Gram-positive and Gram-negative bacteria was evaluated. Maximum Inhibitory Concentrations (MIC) of isolated Allantoin results showed 4 µg/mL for B. subtilis and 8 µg/mL for S. aureus, E. coli and K. pneumoniae.