First report of steroid derivatives isolated from starfish with anti-bacterial, anti-cancer and anti-diabetic activities.

Chemical studies on have afforded two steroids, 5α-cholesta-24-en-3β,20β-diol-23-one () and 5α-cholesta-9(11)-en-3β, 20β-diol (). Structures compounds and were determined with the help of spectroscopic studies. Compound showed strong antibacterial activity (21.

Phytotoxic effects of seaweed mediated copper nanoparticles against the harmful alga: .

In this study, copper nanoparticles (Cu-NPs) were synthesized using Linnaeus and Areschoug aqueous extracts. Transmission Electron microscope indicated that the biosynthesized Cu-NPs averaged 12.7 nm and 13.