Biomechanical pull-tests were used to determine if thallus size and substrate type affect break force and break location of six macroalgal species (Ulva curvata, Gracilaria verrucosa, Gracilaria foliifera, Agardhiella subulata, Fucus vesiculosus and the alien Codium fragile) from a low-energy soft-bottom lagoon in Virginia, USA. Both small and large individuals of all six species incorporated i...

In recent years seaweeds have increasingly attracted interest in the search for new drugs and have been shown to be a primary source of bioactive natural compounds and biomaterials. In the present investigation, the biochemical composition of the red seaweed Gracilaria gracilis, collected seasonally in the Lesina Lagoon (Southern Adriatic Sea, Lesina, Italy), was assayed by means of advanced an...

BACKGROUND Marine environment is inestimable for their chemical and biological diversity and therefore is an extraordinary resource for the discovery of new anticancer drugs. Recent development in elucidation of the mechanism and therapeutic action of natural products helped to evaluate for their potential activity. METHODS We evaluated Gracilaria edulis J. Ag (Brown algae), for its antitumor...

ABSTRACT: This study aimed to determining the manner in which salinity influenced growth of macroalgae Gracilaria birdiae, with objective identifying its tolerance limits this abiotic variable. The specimens were submitted nutrient-enriched water varying salinities (0, 10, 20, 30, 40, 50, and 60 ppt) for a 30-day period. Initially, under extreme conditions (0 G. birdiae suffered negative impact...

Oliveira, V. P.; Freire, F. A. M. & Soriano, E. M. 2012. Influence of depth on the growth of the seaweed Gracilaria birdiae (Rhodophyta) in a shrimp pond. Braz. J. Aquat. Sci. Technol. 16(X): 33-39. eISSN 1983-9057. This study evaluates the influence of depth and environmental parameters on the development of Gracilaria birdiae Plastino & Oliveira (Gracilariaceae) in an organic shrimp pond. The...

BACKGROUND AND OBJECTIVES The Gracilaria (G.) sp are widely used in the traditional medicine in Malaysia. The methanol extract of Gracilaria changii B.M. Xia & I.A. Abbott (Gracilariaciae) was evaluated for antiyeast activity against Candida albicans (Berkhout). MATERIALS AND METHODS The antiyeast activities were studied by using disc diffusion method and broth dilution method. The effect of ...

This study reports the morphological, anatomical and agar content difference among various species of Gracilaria. The cortex was found 1 2 layered in G. edulis and G. eucheumatoides whereas 5 6 layered in G. foliifera and G. crassa. The medulla was 6 8 layered in G. edulis, 10 11 layered in G. foliifera, 14 15 layered in G. eucheumatoides and 8 10 layered in G. crassa. Similarly, distinct varia...

This paper presents the biosorption of zinc from aqueous solutions using Gracilaria corticata (red algae) powder as a biosorbent. The equilibrium studies on biosorption of Zinc are carried out in batch process. The extent of removal depends on initial concentration of Zinc ion, pH, dosage, temperature etc. The optimum dosage is 15 g/L at the equilibrium agitation time of 60 min. The % biosorpti...