“…Phenols have been identified in several algal species as biologically active compounds (Vairappan, et al, 2001). Many compounds of marine algae show anti-bacterial activities as polysaccharide (Laurienzo, 2010), lyengaroside (Ali et al, 2002), polyhydroxy lated fucophlorethol (Sandsdalen et al, 2003), bromophenols (Oh et al, 2008), guaiane sesquiterpene (Chakraborty & Lipton, 2010), lactone malyngolide (Cardelina et al, 1979) cycloeudesmol (Sims et al, 1975), polyphenolic compound (Devi, 2008), halogenated compound (Vairappan, 2003) and quinone metabolite (Horie et al, 2008). Flavonoids comprise a large group of naturally compounds widely distributed in the algae and some of these compounds have been reported to contain various and potent biological activities including anti oxidative tissue protective and tumoristatic effects as well as the inhibition of hepatic cholesterol biosynthesis (Krant et al, 2005;Kim et al, 2007;Matanjun et al, 2008 andVolk, 2009).…”