Gametes, zoospores, and zygotes of the multicellular, green alga Ulva mutabilis showed acid phosphatase reaction product in Golgi vesicles and on the membrane lining the vacuole. In addition gametes and zoospores showed enzyme reaction product on the entire surface membrane including the flagellar membrane. The surface membrane enzyme activity disappears from the zygote shortly after copulation...

Marine algal community signifies a huge source of compound endowed with ingenious structure and potential biological activities. Cytotoxicity of plant or fungal material is considered as the presence of antitumor compounds. In this study, ethanol extracts of seaweeds Dictyota dichotoma var. velutricata, D. hauckiana, D. indica, Iyengaria stellata, Jolyna laminarioides, Melanothamnus afaqhusaini...

Minute amounts of photosynthesis in marine plants can be accurately measured by adding a little phenolphthalein to the sea water, and observing changes in the color of the indicator. In the case of fresh water aquatics bicarbonates are added. By this method it is found that Ulva which has been kept in the dark begins photosynthesis as soon as it is exposed to sunlight and that the rate steadily...

Extracts of four species of seaweeds, Ulva lactuca L. (green), Liagora farinosa Lamouroux (red), Padina pavonia L. and Turbinaria ornata Turn (brown), were screened for their antimicrobial, and antimalarial activities, and binding affinity for human opioid receptors. Phytochemical analysis led to the isolation and identification of 10 constituents: fucosterol, stearic acid, palmitic acid, palmi...

Selective macroalgae comprising green algae (Ulva lactuca), brown (Padina gymnosphora, Sargassam wightii, Turbinaria ornate) and red (Gracilaria corticata, Halimeda macrolopa, Halymenia dilatata, Gracilaria crassa) were collected from Gulf of Mannar, India. Taxonomic molecular identification affirmed the identity microalgal species. Free fatty acids Fatty Acid Methyl Ester (FAME) synthesis by t...

The natural abundance of stable carbon isotope values (δ13C) of organic matter of marine macroalgae collected from Taiwan and its offshore islands (Penghu Islands) were analyzed in this study. These values ranged from -10.5 to -29.5‰. The highest δ13C value came from green algae (-10.5‰), Ulva pertusa while most algae exhibited values in the -14 to -19‰ range. On average, the δ13C values of red...

Plants and algae were found useful in the decontamination of water polluted with chlorinated phenolic compounds. An artificial wastewater contaminated with up to 350 ppm herbicide 2,4-dichlorophenol (2,4-DCP), was successfully treated using horseradish, potato and Ulva sp. (sea lettuce), amended with H2O2. Horseradish -mediated provided up to 99% removal of 2,4-DCP from model solution, while, p...

The settlement and adhesion of Navicula perminuta and Ulva linza to methyl-terminated alkanethiol self-assembled monolayers (SAMs) of increasing chain length has been investigated. Organisms were allowed to settle onto the monolayers and were subsequently exposed to hydrodynamic shear stress in order to determine their adhesion strength. Results show that as the SAM structure changes from amorp...