Heterotrophic Bacillus amyloliquefaciens (MTCC 12716) isolated from the red alga Hypnea valentiae exhibited promising antibacterial activity (minimum inhibitory concentration of ≤1.0 µg/mL) against clinically relevant pathogens. The bacterium displayed bile salt and acid tolerance up to 4 h in a simulated gastric fluid, along with prospective antioxidant effect. This non-hemolytic was found be ...

the antibacterial and antioxidant activities of methanol and acetone extracts of three marine algae, including hypnea hamulosa, gracilaria corticata and enteromorpha intestinalis wereinvestigated.antioxidant activities were determined by means of total antioxidant capacity, total phenolic compounds, dpph radical scavenging activity and ferric reducing antioxidant power. antibacterial activity w...

Two polysaccharide fractions isolated from Hypnea musciformis after room temperature- and hot water extraction, soluble after KCl precipitation of the more abundant carrageenans, were subfractionated by ion-exchange chromatography eluting with increasing concentrations of NaCl. The lowest NaCl concentration (0.2M) eluted agarans. The dl-hybrids (or mixtures) eluted at intermediate concentration...

This study simulated outdoor environmental living conditions and observed the growth rates and changes of several photosynthetic pigments (Chl a, Car, PE, and PC) in Hypnea cervicornis J. Agardh (Gigartinales, Rhodophyta) by setting up different ranges of salinity (25, 30, 35, 40, 45, and 50) and temperature (15, 20, 25, and 30°C). At conditions of culture, the results are as follows. (1) Chang...

Oxidative stress parameters in relation to temperature and other factors have been analysed in Hypnea musciformis, the red seaweed from Anjuna beach, Goa, with an aim to understand its susceptibility to the changing seasons. The results indicate that elevated temperature, sunshine and dessication during peak summer in May enhanced the activity of lipid peroxide, hydrogen peroxide and antioxidan...

A total of ten seaweeds and four seagrasses were used in the present investigation to study the effect of crude methanol extracts on anti-biofilm activity using a microtiter-plate and anti-larval settlement assay using cyprids of barnacle Balanus amphitrite. Of these fourteen species tested, seagrass Halophila ovalis showed noticeable anti-biofilm activity against Listeria monocytogenes, Vibrio...