This report presents a rapid, reproducible and a green biogenic approach for the biosynthesis of gold and silver nanoparticles using leaf extract of Dalbergia sissoo. The biomolecules present in the plant induced the reduction of Au 3+ and Ag + ions from HAuCl 4 and AgNO 3 respectively, which resulted in the formation of Dalbergia conjugated nanoparticles. The growth of nanoparticles was monitored by UV-vis spectrophotometer that demonstrated a peak at 545 and 425 nm corresponding to Plasmon absorbance of gold and silver nanoparticles respectively. The leaf extract was found to direct different shape and sized gold nanoparticles. Gold nanoparticles were 50-80 nm in size and their shape varied from spherical to few triangular and hexagonal polyshaped. While silver nanoparticle synthesized were spherical, in the range of 5-55 nm in size. X-ray diffraction studies corroborated that the biosynthesized nanoparticles were crystalline gold and silver. Fourier transform infrared spectroscopy analysis revealed that biomolecules were involved in the synthesis and capping of silver nanoparticles and gold nanoparticles.

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COVID-19 has impacted sleep-health in various ways. There has been a substantial increase in the number of patients or subjects with sleep issues, with majority reporting delayed onset, fragmented and/or poor-quality sleep. Sleep is a restorative process; is very crucial to body’s response to anything that’s foreign and serves as a repairing phase of our system. Sleep is generated by our brain; it is of the brain and most importantly for the brain. The universal lockdown due to COVID-19 pandemic has created many sleep related mental issues.