Extensive work has been done to explore the potential promises of plant systems in the synthesis of metal nanoparticles. We report here a green approach for the synthesis of silver nanoparticles with a cocktail of biochemical constituents from cashew apple juice (Anacardium occidentale L.). We presume that the reduction potential of these constituents in the crude extract plays a vital role in the bioreduction of Ag⁺ to Ag⁰. This is a facile method for the production of silver nanoparticles (AgNPs) and has many advantages over other plant extracts. The synthesized AgNPs were further characterized using ultraviolet (UV) spectrophotometry, energy-dispersive X-ray spectroscopy (EDAX), scanning electron microscopy (SEM), and X-ray diffraction (XRD) methods.

To develop a simple rapid procedure for bioreduction of silver nanoparticles (AgNPs) using aqueous leaves extracts of Catharanthus roseus (C. roseus). Characterization were determined by using UV-Vis spectrophotometry, scanning electron microscopy (SEM), energy dispersive X-ray and X-ray diffraction. SEM showed the formation of silver nanoparticles with an average size of 67 nm to 48 nm. X-ray diffraction analysis showed that the particles were crystalline in nature with face centered cubic geometry. C. roseus demonstrates strong potential for synthesis of silver nanoparticles by rapid reduction of silver ions (Ag(+) to Ag(0)). This study provides evidence for developing large scale commercial production of value-added products for biomedical/nanotechnology-based industries.

The essential oil extracted by hydro-distillation from rhizome of Curcuma caesia Roxb. grown in southern India were analyzed by gas chromatography and gas chromatography–mass spectrometry. A total of 35 volatile essential oil components were identified in the extracted oil of C. caesia representing tropolone (15.86 %) as major compound, ledol (3.27 %), β-elemenone (3.03 %) and α-bulnesene (3.02 %), spathulenol (2.42 %) as minor compounds and borneol (0.85 %), α-terpineol (0.77 %), eucalyptol (0.62 %), caryophyllene (0.45 %) as trace compounds. The results from our analysis indicated that levels of sesquiterpene (62.8 %) were more than those of monoterpene components (1.4 %).