Publications

biochemical characterization of algal coated vesicles.	thin sections of tissue preparations from a green alga, ulva lactuca (ulvophyceae), and brown alga, laminaria digitata (pheophyceae) showed the presence of coated pits and coated vesicles in these 2 species. a discontinuous sucrose gradient after subcellular fractionation of the tissue homogenate resulted in an enriched coated vesicle fraction. electron microscopy of negatively stained samples revealed the presence of coated vesicles of diameter ranging from 40-125 nm, together with large sheets ...	1990	1971186
toxicity to estuarine organisms of leachates from chromated copper arsenate treated wood.	the effects of chromated copper arsenate (cca), used for treating wood in docks, pilings, and bulkheads, were studied in several estuarine organisms. leaching of metals from treated wood into sea water was assayed by atomic absorption spectrophotometry. fiddler crabs (uca pugilator) were subjected to limb removal and were placed in containers with treated wood of various sizes or control wood. limb regeneration rate was retarded in a dose-dependent fashion and mortality occurred with the treated ...	1991	1996903
h blood group detection by the l-fucose binding lectin of the green marine alga ulva lactuca.	extracts of the green marine alga ulva lactuca collected along the seashore of tel-aviv exhibit hemagglutinating activity towards papain-treated human erythrocytes. this hemagglutinating activity was shown to be inhibited by l-fucose and edta, and to be relatively resistant to heating at 60 degrees c, while sensitive to low ph. like the lectin of ulex europeus, the ulva lectin exhibits blood group h specificity. it agglutinates most strongly erythrocytes of blood group 0(h) followed by b greater ...	1988	3208955
studies on na+-k+-activated adenosine triphosphatase. xvi. its absence from the cation transport system of ulva lactuca.		2014	4223673
[chemical composition of the most frequently encountered black sea algae and a trial of their biological activity on the laying capacity of hens].	it has been found through chemical analysis that the black sea algae cystozeira barbata, ulva lactuca, and zostera nona contain considerable amounts of carbohydrates, proteins, fats, carotene, vitamin e, ca, fe, and mg. supplements of algal meal in the ration mixtures for laying chickens has raised the egg laying capacity of the birds. besides, the eggs were of higher weight and contained more ca in their shells. the yolks contained higher amounts of carotene and vitamins (a and e).	1983	6659360
isolation of a polysaccharide with antiviral effect from ulva lactuca.	a polysaccharide from the green marine algae ulva lactuca has been isolated. the substance has been investigated after acid hydrolysis by thin-layer and gas chromatography. the following carbohydrate components have been found: arabinose-xylose-rhamnose-galactose-mannose-glucose in ratio 1:1:9:5:2.5:16 respectively. one unidentified sugar has been demonstrated too. the polysaccharide has been studied for antiviral activity in vitro against a number of human and avian influenza viruses. a conside ...	1994	8072958
biochemical responses of the marine macroalgae ulva lactuca and fucus vesiculosus to cadmium and copper-from sequestration to oxidative stress.		1997	9056961
[chilean edible sea macroalgae as sources of dietary fiber: effect on apparent digestibility of protein, fiber, and energy and fecal weight of rats].	the inclusion of algae as a source of fiber in the diet is justified by the present need to increase the intake of this nutrient. the aim of this study was to study on rats, the effect of dietary algae fiber on fecal weight and apparent digestibility of energy, protein and fiber. the type of algae studied were cochayuyo (frond) and ulte (basal part) (durvillea antarctica), luche verde (ulva lactuca) and luche rojo (porphyra columbina). all these algae were boiled and dried at 55 degrees under ai ...	1996	9161459
an overview of trace metal pollution in the coastal waters of hong kong.	the state of metal pollution in hong kong's coastal waters has been assessed by measuring metal levels in: (i) the water column; (ii) sediments and (iii) in organisms, i.e. biomonitors. current literature is reviewed. data from sediment analysis have shown that metal pollution is most severe in the urban areas of victoria harbour, tolo harbour, deep bay and northwestern waters. bottom sediments in typhoon shelters are particularly heavily polluted with, for example, cu levels from kowloon bay re ...	1998	9646516
evaluation of the contamination of marine algae (seaweed) from the st. lawrence river and likely to be consumed by humans.	the goal of the study was to assess the contamination of marine algae (seaweeds) growing in the st. lawrence river estuary and gulf of st. lawrence and to evaluate the risks to human health from the consumption of these algae. algae were collected by hand at low tide. a total of 10 sites on the north and south shores of the st. lawrence as well as in baie des chaleurs were sampled. the most frequently collected species of algae were fucus vesiculosus, ascophyllum nodosum, laminaria longicruris, ...	1999	10092431
biological properties of ulvan, a new source of green seaweed sulfated polysaccharides, on cultured normal and cancerous colonic epithelial cells.	ulvans (from ulva lactuca) constitute a dietary fiber structurally similar to the mammalian glycosaminoglycans but with unexplored biological or cytotoxic activities. from native low-viscosity preparations containing 33.5 molar % and 18.4 molar % of sulfate residues and uronic acid residues, respectively, we derived desulfated, reduced and desulfated-reduced polysaccharides with respectively 5.2, 2.9, and 4.5-4.9 molar % of sulfate residues and uronic acid residues. the effects of these preparat ...	1999	10483372
predator-prey relations between age-1+ summer flounder (paralichthys dentatus, linnaeus) and age-0 winter flounder (pseudopleuronectes americanus, walbaum): predator diets, prey selection, and effects of sediments and macrophytes.	laboratory experiments and weekly trammel net surveys in the navesink river, new jersey (usa) were used to examine the predator-prey interaction between age-1+ summer flounder (paralichthys dentatus) and age-0 winter flounder (pseudopleuronectes americanus). winter flounder (24-67 mm tl) were the dominant piscine prey of summer flounder (n=95, 252-648 mm tl) collected in trammel nets. we observed a temporal shift in summer flounder diets from sand shrimp (crangon septemspinosa) and winter flound ...	2000	10958899
distribution of mycosporine-like amino acids in the sea hare aplysia dactylomela: effect of diet on amounts and types sequestered over time in tissues and spawn.	we investigated the interaction of diet and accumulation of uv-absorbing mycosporine-like amino acids (maas) in body tissues and spawn of the sea hare aplysia dactylomela to determine if maa accumulation reflects type and level of dietary intake. food sources were the red algae acanthophora spicifera, centroceras clavulatum, and laurencia sp., and the green alga, ulva lactuca. adults were maintained on these foods for 40 days, after which feces were collected and tissues separated by dissection. ...	2000	11048669
biologically active steroid from the green alga ulva lactuca.	the marine green alga, ulva lactuca, was shown to contain 3-o-beta-d glucopyranosyl-stigmasta-5,25-dien. the structure of the compound was established on the basis of its spectroscopic data and it was extracted for the first time from this alga. the topical antiinflammatory activity of this compound was examined using the mouse ear oedema assay as an experimental model of topical inflammation. also, the antimicrobial activity of the isolated compound was tested against 10 various microorganisms ...	2000	11114004
photoinhibition of photosynthesis in macrocystis pyrifera (phaeophyceae), chondrus crispus (rhodophyceae) and ulva lactuca (chlorophyceae) in outdoor culture systems.	the effect of solar radiation on photosynthesis and chlorophyll fluorescence associated to photosystem ii (ps ii) was determined in the phaeophyta macrocystis pyrifera, the rhodophyta chondrus crispus and the chlorophyta ulva lactuca by oxygen evolution and pulse-amplitude-modulated (pam) fluorescence. the algae were maintained in 1.2 m3 outdoor tanks with constant aeration and at 8, 26 and 100% incident irradiance (e(o)). all three species showed a decrease in deltaf/f'm values during solar noo ...	2000	11154083
phylogenetic relationship and antifouling activity of bacterial epiphytes from the marine alga ulva lactuca.	it is widely accepted that bacterial epiphytes can inhibit the colonization of surfaces by common fouling organisms. however, little information is available regarding the diversity and properties of these antifouling bacteria. this study assessed the antifouling traits of five epiphytes of the common green alga, ulva lactuca. all isolates were capable of preventing the settlement of invertebrate larvae and germination of algal spores. three of the isolates also inhibited the growth of a variety ...	2000	11200436
inhibition of algal spore germination by the marine bacterium pseudoalteromonas tunicata.	a collection of 56 bacteria isolated from different surfaces in the marine environment were assayed for their effects on the germination of spores from the common green alga ulva lactuca. thirteen bacterial isolates were shown to inhibit spore germination. of these bacteria, pseudoalteromonas tunicata displayed the most pronounced effects against algal spores. further characterisation of the anti-algal activity of p. tunicata was performed and it was found that this bacterium produces an extrace ...	2001	11248391
heavy metals in the aquatic environment of the southern adriatic sea, italy: macroalgae, sediments and benthic species.	samples of sea urchins (paracentrotus lividus), holothurians (holothuria polii), green algae (ulva lactuca. codium vermilara and enteromorpha prolifera) and sediments were collected from different coastal zones of the south adriatic sea (italy). the occurrence of metals in macroalgae is poor especially if compared with that reported in other coastal areas affected by human activities, with the exception of fe that showed high mean values (405 microg g(-1) dry wt.). likewise, relationships betwee ...	2001	11485218
pseudoalteromonas ulvae sp. nov., a bacterium with antifouling activities isolated from the surface of a marine alga.	a dark-purple marine bacterium that inhibits the germination of marine algal spores and the settlement of invertebrate larvae has been characterized and assessed for taxonomic assignment. two strains, designated ul12t and ul13, were isolated from the surface of the common marine alga ulva lactuca. based on 16s rdna sequencing, ul12t and ul13 were found to show the highest similarity (97%) to members of the genus pseudoalteromonas. dna-dna hybridization studies demonstrated less than 28% genomic ...	2001	11491351
differential staining of western blots of avian egg white glycoproteins using diverse lectins.	avian egg white glycoproteins which differ in structure and carbohydrate composition, vary in their interactions with diverse lectins. generally, wheat germ agglutinin (wga) and concanavalin a (con a) are used for the identification and separation of those of the chicken. in the present study, interactions of a battery of lectins, including: the above two, several galactophilic lectins (from aplysia gonad (agl), erythrina corallodendron (ecorl), peanut (pna) and pseudomonas aeruginosa (pa-il)), ...	2002	11824624
lead and cadmium levels in coastal benthic algae (seaweeds) of tenerife, canary islands.	lead and cadmium levels of some species of brown-algae (phaeophyta) from the mesolittoral (intertidal area) of the island of tenerife (central-eastern atlantic) were determined by atomic absorption spectrometry. the quality control was carried out using a standard "crm 279 ulva lactuca". the mean, minimum and maximum concentrations were 11.21, 2.090 and 81.795 microg/g/dw; and 1.13, 0.190 and 5.130 microg/g/dw for lead and cadmium, respectively. the fact that samples registering the highest cadm ...	2003	12504159
stable carbon and nitrogen isotope signatures indicate recovery of marine biota from sewage pollution at moa point, new zealand.	stable carbon and nitrogen isotopes have been used to assess sewage contamination of a sewage outfall, discharging milli-screened effluent into moa point bay, new zealand, and monitor the recovery of flora and fauna after the outfall's closure. an initial study characterising the extent of the discharge and the effects on seaweed (ulva lactuca l.), blue mussels (mytilus galloprovincialis) and limpets (cellana denticulata) from the area, showed effects of the sewage discharge on flora and fauna w ...	2003	12837300
a biomonitoring study: trace metals in algae and molluscs from tyrrhenian coastal areas.	marine organisms were evaluated as possible biomonitors of heavy metal contamination in marine coastal areas. concentrations of cd, cr, cu, pb, and zn were measured in the green algae ulva lactuca l., the brown algae padina pavonica (l.) thivy, the bivalve mollusc mytilus galloprovincialis lamarck, and the two gastropod molluscs monodonta turbinata born and patella cerulea l. collected at six coastal stations in the area of the gulf of gaeta (tyrrhenian sea, central italy). the coastal area of t ...	2003	12865053
the development of a marine natural product-based antifouling paint.	problems with tin and copper antifouling compounds have highlighted the need to develop new environmentally friendly antifouling coatings. bacteria isolated from living surfaces in the marine environment are a promising source of natural antifouling compounds. four isolates were used to produce extracts that were formulated into ten water-based paints. all but one of the paints showed activity against a test panel of fouling bacteria. five of the paints were further tested for their ability to i ...	2003	14618721
real-time quantitative pcr for assessment of abundance of pseudoalteromonas species in marine samples.	a real-time quantitative pcr (rtq-pcr) method for measuring the abundance of pseudoalteromonas species in marine samples is presented. pcr primers targeting a pseudoalteromonas-specific region of the 16s rrna gene were tested at three different levels using database searches (in silico), a selection of pure cultures (in vitro), and a combined denaturing gradient gel electrophoresis and cloning approach on environmental dna (in situ). the rtq-pcr method allowed for the detection of sybr green flu ...	2004	15066834
seasonal changes in an intertidal community affected by sewage pollution.	seasonal changes in structure of a rocky intertidal community affected by sewage pollution at quequén (argentina) were studied over a period of 2 years. most species showed a decrease in cover values in the polluted area. on the other hand, a small proportion of organisms favoured by organic enrichment predominated around the outfall during the period of study. community structure was not significantly altered by frosts or windstorms. desiccation is identified as the main physical stress. a comb ...	1993	15091785
evaluation of heat shock protein 70 as a biomarker of environmental stress in fucus serratus and lemna minor.	heat shock proteins (hsps) are known to be induced in response to short-term stress. the present study aimed to evaluate the potential of hsp70 as a biomarker of stress produced by increased temperature, osmotic pressure, and exposure to cadmium and sodium chloride in marine macroalgae and fresh water plant species. an indirect competitive enzyme-linked immunosorbent assay (ic-elisa) was developed with a working range of 0.025-10 microg ml(-1) using a monoclonal antibody raised against purified ...	2004	15370872
competitive interactions in mixed-species biofilms containing the marine bacterium pseudoalteromonas tunicata.	pseudoalteromonas tunicata is a biofilm-forming marine bacterium that is often found in association with the surface of eukaryotic organisms. it produces a range of extracellular inhibitory compounds, including an antibacterial protein (alpp) thought to be beneficial for p. tunicata during competition for space and nutrients on surfaces. as part of our studies on the interactions between p. tunicata and the epiphytic bacterial community on the marine plant ulva lactuca, we investigated the hypot ...	2005	15811995
mercury in surface sediments and benthic organisms from guaymas bay, east coast of the gulf of california.	in order to know the concentration of mercury in surface sediments, macroalgae and clams from guaymas bay, mexico, 20 surface sediment samples and several individuals of codium amplivesciculatum (3), enteromorpha clathrata (4), gracilaria subsecundata (2), ulva lactuca (2), chione subrugosa (80) and crassostrea gigas (40) were collected and their hg concentration was measured by a cold vapor hg analyzer, after acid digestion. in addition, granulometric analysis and quantification of total organi ...	2005	16027967
effects of artificial reefs on fish grazing in their vicinity: evidence from algae presentation experiments.	artificial reefs have been suggested as a tool for conservation and restoration of marine habitats. however, the relationships between coral reef habitats and man-made structures are poorly understood. we experimentally tested whether artificial reefs change grazing patterns in their surrounding environment. we exposed heaps of the macroalgae, ulva lactuca, to natural grazing, at various distances from three artificial reefs. results suggest that artificial reefs change grazing patterns in the n ...	2006	16176830
a card-fish protocol for the identification and enumeration of epiphytic bacteria on marine algae.	a card-fish protocol was developed and applied to analyse surface-associated bacteria on the marine algae ulva lactuca, delisea pulchra, corallina officinalis, amphiroa anceps, porphyra sp. and sargassum linearifolium. the combination of alexa(546)-labelled tyramide as the reporter molecule with sybr green ii counterstain allowed for superior detection of the hybridised probe fluorescence against plant tissue from which pigment autofluorescence has been reduced.	2006	16216355
differential effects of dimethylsulfoniopropionate, dimethylsulfonioacetate, and other s-methylated compounds on the growth of sinorhizobium meliloti at low and high osmolarities.	an extract from the marine alga ulva lactuca was highly osmoprotective in salt-stressed cultures of sinorhizobium meliloti 102f34. this beneficial activity was due to algal 3-dimethylsulfoniopropionate (dmsp), which was accumulated as a dominant compatible solute and strongly reduced the accumulation of endogenous osmolytes in stressed cells. synthetic dmsp also acted as a powerful osmoprotectant and was accumulated as a nonmetabolizable cytosolic osmolyte (up to a concentration of 1,400 nmol/mg ...	1998	16349544
circadian rhythms of chloroplast orientation and photosynthetic capacity in ulva.	ulva lactuca l. var. latissima (l.) decandolle and var. rigida (c. agardh) le jolis and u. mutabilis foyn have a circadian rhythm of chloroplast orientation which results in large changes in the light-absorption properties of the thallus. during the day, the chloroplasts cover the outer face of the cells and absorbance is high. at night, the chloroplasts are along the side walls and absorbance is low. enteromorpha linza (l.) j. agardh, e. intestinalis (l.) link, e. sp., and monostroma grevillei ...	1976	16659613
phosphorus-31 and nitrogen- 14 nmr studies of the uptake of phosphorus and nitrogen compounds in the marine macroalgae ulva lactuca.	cytoplasmic phosphomonoesters and inorganic phosphate, as well as vacuolar inorganic phosphate and polyphosphates, gave rise to the major peaks in (31)p nuclear magnetic resonance (nmr) spectra of the marine macroalgae enteromorpha sp., ceramium sp., and ulva lactuca which were collected from the sea. in contrast, nmr-visible polyphosphates were lacking in pylaiella sp. and intracellular vacuolar phosphate seemed to act as the main phosphorus store in this organism. in laboratory experiments, po ...	1989	16666713
turkish freshwater and marine macrophyte extracts show in vitro antiprotozoal activity and inhibit fabi, a key enzyme of plasmodium falciparum fatty acid biosynthesis.	the ethanolic extracts of a number of turkish freshwater macrophytes (potamogeton perfoliatus, ranunculus tricophyllus and cladophora glomerata) and marine macroalgae (dictyota dichotoma, halopteris scoparia, posidonia oceanica, scinaia furcellata, sargassum natans and ulva lactuca) were assayed for their in vitro antiprotozoal activity. trypanosoma brucei rhodesiense, trypanosoma cruzi, leishmania donovani and plasmodium falciparum were used as test organisms. the cytotoxicity of the extracts w ...	2006	16697632
seaweeds along kwazulu-natal coast of south africa--4: elemental uptake by edible seaweed caulerpa racemosa (sea grapes) and the arsenic speciation.	the elemental uptake by edible seaweed caulerpa racemosa (sea grapes), a marine macroalgae (chlorophyta, green alga) grown richly along kwazulu-natal coastline. the total concentrations of seven elements, namely mn, fe, as, b, ti, zn and hg in caulerpa racemosa were monitored for a one-year cycle (june 2002 to may 2003) at four selected sampling sites spread over 150 km wide from north to south. the c. racemosa possess high arsenic, boron and titanium accumulating ability, but low iron uptake. a ...	2006	16854796
palatability of macroalgae that use different types of chemical defenses.	this study compared algal palatability and chemical defenses from subtropical green algae that may use different types of defense systems that deter feeding by the rock-boring sea urchin echinometra lucunter. the potential defense systems present include (1) the terpenoid caulerpenyne and its activated products from caulerpa spp., and (2) dimethylsulfoniopropionate (dmsp)-related defenses in ulva spp. secondary metabolites from these chemical groups have been shown to deter feeding by various ma ...	2006	16906362
temporal and intrapopulation variation in prey choice of wintering geese determined by stable isotope analysis.	1. individual variability in prey preferences can have marked effects on many demographic parameters from individual survival and fecundity to the vital rates of entire populations. a population level response is ultimately determined by individual prey choices; however, the effect of individual dietary choice is often overlooked. 2. we determined prey choice by individual consumers, light-bellied brent geese branta bernicla, during the overwintering period. two hundred and eighty-one individual ...	2006	16922855
radionuclides in marine macroalgae from amchitka and kiska islands in the aleutians: establishing a baseline for future biomonitoring.	levels of radionuclides in seven species of marine brown algae and ulva were determined to establish a baseline for the northern pacific ocean/bering sea (aleutian islands). there were differences in levels among algal species and locations (amchitka island vs kiska island). no values were above the minimum detectable activity (mda) level for (137)cs, (129)i, (60)co, (152)eu, (90)sr, and (99)tc. there were interspecific differences in some radionuclides: ulva lactuca (=ulva fenestrata) had the h ...	2006	17029666
varying stable nitrogen isotope ratios of different coastal marsh plants and their relationships with wastewater nitrogen and land use in new england, usa.	the stable nitrogen isotope ratios of some biota have been used as indicators of sources of anthropogenic nitrogen. in this study the relationships of the stable nitrogen isotope ratios of marsh plants, iva frutescens (l.), phragmites australis (cav.) trin ex steud, spartina patens (ait.) muhl, spartina alterniflora loisel, ulva lactuca (l.), and enteromorpha intestinalis (l.) with wastewater nitrogen and land development in new england are described. five of the six plant species (all but u. la ...	2007	17171277
cu(ii) binding by dried biomass of red, green and brown macroalgae.	dried biomass of the marine macroalgae fucus spiralis and fucus vesiculosus (brown), ulva spp. (comprising ulva linza, ulva compressa and ulva intestinalis) and ulva lactuca (green), palmaria palmata and polysiphonia lanosa (red) were studied in terms of their cu(ii) biosorption performance. this is the first study of its kind to compare cu(ii) uptake by these seaweeds in the south-east of ireland. potentiometric and conductimetric titrations revealed a variety of functionalities on the seaweed ...	2007	17234234
molecular investigation of the distribution, abundance and diversity of the genus pseudoalteromonas in marine samples.	the genus pseudoalteromonas has attracted interest because it has frequently been found in association with eukaryotic hosts, and because many pseudoalteromonas species produce biologically active compounds. one distinct group of pseudoalteromonas species is the antifouling subgroup containing pseudoalteromonas tunicata and ps. ulvae, which both produce extracellular compounds that inhibit growth and colonization by different marine organisms. pcr primers targeting the 16s rrna gene of the genus ...	2007	17573938
comparative study of chromium biosorption by red, green and brown seaweed biomass.	dried biomass of the macroalgae fucus vesiculosus and fucus spiralis (brown), ulva spp. (comprising ulva linza, ulva compressa and ulva intestinalis) and ulva lactuca (green), palmaria palmata and polysiphonia lanosa (red) were studied in terms of their chromium biosorption performance. metal sorption was highly ph dependent with maximum cr(iii) and cr(vi) sorption occurring at ph 4.5 and ph 2, respectively. extended equilibrium times were required for cr(vi) binding over cr(iii) binding (180 an ...	2008	17884133
biomonitoring study of heavy metals in biota and sediments in the south eastern coast of mediterranean sea, egypt.	concentrations of cd, cu, co, zn, mn and fe were determined in biota and sediment samples collected from the eastern harbour and el-mex bay in the mediterranean sea, egypt. the levels of cu, co, zn, mn and fe in the macroalgae, ulva lactuca, enteromorpha compressa (green algae) and jania rubens (red algae), recorded high concentrations except for cd. moreover, fe was the most predominant metal in the seaweed. the two species of bivalves, donax trunculus and paphia textile, showed different amoun ...	2008	18074236
using stable isotopes to monitor anthropogenic nitrogen inputs to estuaries.	use of stable nitrogen isotope ratios is one method that has been proposed to indicate anthropogenic nutrient enrichment in estuarine systems. however, the role of stable isotopes as a tool in long-term ecosystem monitoring has not been fully developed. resident producer and consumer species were collected from marshes dominated by spartina alterniflora and subject to a range of anthropogenic impacts in cape cod, massachusetts, and in great south bay and jamaica bay, new york. tissue isotope rat ...	2008	18372553
anti-peroxidative and anti-hyperlipidemic nature of ulva lactuca crude polysaccharide on d-galactosamine induced hepatitis in rats.	to find whether pretreatment of ulva lactuca polysaccharide (ulp) extract could be effective against d-galactosamine (500 mg/kg body weight, i.p.) induced anomaly in rat. serum total cholesterol (tc), triglycerides (tg), free fatty acid (ffa), phospholipids (pl), high density lipoprotein (hdl), low density lipoprotein (ldl), very low density lipoprotein (vldl), tissue lipoperoxides (lpo), hepatic protein thiols, non-enzymatic anti-oxidants glutathione (gsh) and vitamins (e and c) were examined u ...	2008	18706469
biomass-modified carbon paste electrodes for monitoring dissolved metal ions.	electrodes were prepared by incorporating dried, nonliving biomass of a common lichen, ramalina stenospora, and sphagnum (peat) moss in carbon paste. the electrodes were tested on solutions containing pb(ii) and cu(ii) ions by immersing the electrode in the solution for selected periods of time to accumulate ions. following this the electrode was connected to a potentiostat and the applied voltage scanned from -1.0 to +0.5 v vs. sce. any adsorbed metal ions were stripped back into solution at th ...	1998	18967106
stabilization of mitochondrial and microsomal function by polysaccharide of ulva lactuca on d-galactosamine induced hepatitis in rats.	in this study we used liver mitochondrial and microsomal fraction from rats pretreated with seaweed ulva lactuca polysaccharide extract (ulp - 200mg/kg body weight, daily for 21 days, oral gavage) on d-galactosamine (500mg/kg body weight, intraperitoneally) challenge. effectiveness of ulp was determined based on functional status of trichloro acetic acid (tca), urea cycle, and microsomal enzymes. the composition of sulfate polysaccharide content such as total sugars, sulfate and uronic acid were ...	2009	19000663
isolation and characterization of high quality dna from marine benthic macroalgae.	the isolation of high quality dna is essential for many molecular biology applications including polymerase chain reaction (pcr) and endonuclease restriction digestion based techniques. an easy and inexpensive protocol has been developed for extracting genomic dna from seven species of algae viz. lola capillaries, enteromorpha intestinalis, ulva lactuca and rhizoclonium sp belonging to chlorophyceae, catenella nipae, polysiphonia mollis belonging to rhodophyceae and dictyota ceylanica belonging ...	2008	19297990
antioxidant activities of four edible seaweeds from the southern coast of thailand.	the aqueous extracts of four marine algae, caulerpa racemosa var. macrophysa, gracilaria tenuistipitata var. tenuistipitata, sargassum sp., and ulva lactuca, from the coastal areas in southern thailand, were prepared by boiling dried seaweed powder in water for 3 h, and by autoclaving each sample at 120 degrees c for 3 h. they were then freeze-dried and evaluated for their antioxidant activities using dpph (1, 1-diphenyl-2-picrylhydrazyl), hydroxyl radical (oh()) and superoxide anion (o(2)(-) ...	2009	19609678
antifouling activities expressed by marine surface associated pseudoalteromonas species.	abstract members of the marine bacterial genus pseudoalteromonas have been found in association with living surfaces and are suggested to produce bioactive compounds against settlement of algal spores, invertebrate larvae, bacteria and fungi. to determine the extent by which these antifouling activities and the production of bioactive compounds are distributed amongst the members of the genus pseudoalteromonas, 10 different pseudoalteromonas species mostly derived from different host organisms w ...	2002	19709238
antiprotozoal, antimycobacterial and cytotoxic potential of some british green algae.	in the continuation of our search for natural sources for antiprotozoal and antitubercular molecules, we have screened the crude extracts of four green marine algae (cladophora rupestris, codium fragile ssp. tomentosoides, ulva intestinalis and ulva lactuca) collected from the dorset area of england. trypanosoma brucei rhodesiense, trypanosoma cruzi, leishmania donovani and mycobacterium tuberculosis were used as test organisms in the in vitro assays. the selective toxicity of the extracts was a ...	2010	19960429
differential responses to cadmium induced oxidative stress in marine macroalga ulva lactuca (ulvales, chlorophyta).	this study describes various biochemical processes involved in the mitigation of cadmium toxicity in green alga ulva lactuca. the plants when exposed to 0.4 mm cdcl(2) for 4 days showed twofold increase in lipoperoxides and h(2)o(2) content that collectively decreased the growth and photosynthetic pigments by almost 30% over the control. the activities of antioxidant enzymes such as superoxide dismutase (sod), ascorbate peroxidase (apx), glutathione reductase (gr) and glutathione peroxidase (gpx ...	2010	20112049
a preliminary study on the anti-inflammatory activity of methanol extract of ulva lactuca in rat.	anti-inflammatory drugs presently available for the treatment of various inflammatory disorders have diverse and undesirable side effects. in recent years; active principles of varied chemical structures have been isolated from plants possessing anti-inflammatory activity. sulfated polysaccharides present in algae were shown to posses anti-inflammatory properties. ulva lactuca the green alga available in tuticorin coast was found to show anti-inflammatory effect as evidenced by the reduction in ...	2009	20143726
biosorption of bovine serum albumin by ulva lactuca biomass from industrial wastewater: equilibrium, kinetic and thermodynamic study.	batch biosorption experiments have been carried out for the removal of bovine serum albumin (bsa) from simulated industrial wastewater onto ulva lactuca seaweed. various vital parameters influencing the biosorption process such as initial concentration of bsa, ph of the solution, adsorbent dosage and temperature have been determined. the biosorption kinetics follows a pseudo-second order kinetic model. equilibrium isotherm studies demonstrate that the biosorption followed the freundlich isotherm ...	2010	20863618
bioenergy potential of ulva lactuca: biomass yield, methane production and combustion.	the biomass production potential at temperate latitudes (56°n), and the quality of the biomass for energy production (anaerobic digestion to methane and direct combustion) were investigated for the green macroalgae, ulva lactuca. the algae were cultivated in a land based facility demonstrating a production potential of 45t (ts) ha(-1) y(-1). biogas production from fresh and macerated u. lactuca yielded up to 271 ml ch(4) g(-1) vs, which is in the range of the methane production from cattle manur ...	2010	21044839
ethanol production from marine algal hydrolysates using escherichia coli ko11.	algae biomass is a potential raw material for the production of biofuels and other chemicals. in this study, biomass of the marine algae, ulva lactuca, gelidium amansii,laminaria japonica, and sargassum fulvellum, was treated with acid and commercially available hydrolytic enzymes. the hydrolysates contained glucose, mannose, galactose, and mannitol, among other sugars, at different ratios. the laminaria japonica hydrolysate contained up to 30.5% mannitol and 6.98% glucose in the hydrolysate sol ...	2011	21640583
polyunsaturated fatty acids in various macroalgal species from north atlantic and tropical seas.	in this study the efficacy of using marine macroalgae as a source for polyunsaturated fatty acids, which are associated with the prevention of inflammation, cardiovascular diseases and mental disorders, was investigated.	2011	21696609
Antitumour and antioxidant activity of some Red Sea seaweeds in Ehrlich ascites carcinoma in vivo.	The antitumour activities of extracts from the Red Sea seaweeds Jania rubens, Sargassum subrepandum, and Ulva lactuca were investigated in an in vivo mice model based on intramuscular injection of Ehrlich ascites tumour cells. In parallel, antioxidant activities were measured. Tumour marker levels, liver biochemical parameters, and hepatic oxidant/antioxidant status were measured to prove the anticancer and antioxidant nature of the algal extracts. Significant decreases in carcinoembryonic antig ...	2011	21950161
the need for standardised broad scale bioassay testing: a case study using the red alga laurencia rigida.	two major problems associated with biofouling studies are the lack of broad scale testing and failure to use consistent standards among different assays or studies. to address these issues the activity of two biologically active natural products, elatol and deschloroelatol, isolated from the marine red alga laurencia rigida, and three commonly used biocides, nopcocide n-96™, irgarol 1051™ and sea-nine 211™, was compared, in a broad spectrum of bioassays. the activity of the different compounds v ...	1996	22115113
inhibition of common fouling organisms by marine bacterial isolates ith special reference to the role of pigmented bacteria.	two questions of relevance to the establishment of marine biofouling communities were addressed, viz (1) what is the frequency with which bacterial strains isolated from living and inanimate surfaces in the marine environment show inhibitory activity against the settlement of common fouling organisms, and (2) is the antifouling bacterium, d2, an inhabitant of different marine waters, and how unique is this bacterium, in its mode of action against different target organisms? with respect to the f ...	1996	22115116
[uses of algae and mosses in medicinal manuscripts].	in this study medicinal uses of algae and mosses are investigated in manuscripts of ibn-i baytar (ibn al baithar), ibn-i sina (avicenna), huneyn bin ishak (joannitus), dioscorides and plinius. ulva lactuca and fucus sp. have been identified according to the descriptions given in these manuscripts. it is designated that the arabic term "tuhlub" occupies both the meanings of any algal species and lemna minor of spermatophyta.	2011	22164736
inhibition of japanese encephalitis virus infection by the sulfated polysaccharide extracts from ulva lactuca.	japanese encephalitis virus (jev), a neurotropic flavivirus, is one of the major causes of acute encephalitis in humans. after infection, inflammatory reactions and neurological diseases often develop. still there are no effective drugs available against virus infection. recently, extracts of algae have been shown to possess a broad range of biological activities including antivirus activity. in this study, we identified that the sulfated polysaccharide extracts from ulva lactuca can inhibit jev ...	2011	22193590
anaerobic digestion of macroalgae: methane potentials, pre-treatment, inhibition and co-digestion.	in the present study we tested four macroalgae species--harvested in denmark--for their suitability of bioconversion to methane. in batch experiments (53 degrees c) methane yields varied from 132 ml g volatile solids(-1) (vs) for gracillaria vermiculophylla, 152 mi gvs(-1) for ulva lactuca, 166 ml g vs(-1) for chaetomorpha linum and 340 ml g vs(-1) for saccharina latissima following 34 days of incubation. with an organic content of 21.1% (1.5-2.8 times higher than the other algae) s. latissima s ...	2011	22335117
in situ fuel processing in a microbial fuel cell.	a microbial fuel cell (mfc) was designed in which fuel is generated in the cell by the enzyme glucoamylase, which is displayed on the surface of yeast. the enzyme digests starch specifically into monomeric glucose units and as a consequence enables further glucose oxidation by microorganisms present in the mfc anode. the oxidative enzyme glucose oxidase was coupled to the glucoamylase digestive enzyme. when both enzymes were displayed on the surface of yeast cells in a mixed culture, superior fu ...	2012	22833422
c-amp dependent protein kinase a inhibitory activity of six algal extracts from southeastern australia and their fatty acid composition.	c-amp dependent protein kinase (protein kinase a, pka) is an important enzyme involved in the regulation of an increasing number of physiological processes including immune function, cardiovascular disease, memory disorders and cancer. the objective of this study was to evaluate the pka inhibitory activity of a range of algal extracts, along with their fatty acid composition. six algal species were investigated including two chlorophyta (codium dimorphum and ulva lactuca), two phaeophyta (phyllo ...	2012	22908583
studies on radionuclides 228ra, 238u, 228th and 40k in selected seaweeds of coastal tamil nadu, india.	studies on natural and anthropogenic radioactivity assume greater importance in the context of human health and development. hence two species of seaweeds viz: gracilaria edulis and ulva lactuca, from three high background radiation areas (arockiapuram, kadiapattinam and kurumpanai) on the southwest coast of tamil nadu, and mandapam as low background radiation area of the southeast coast of tamil nadu were studied for variations in activity concentration of 228ra, 40k, 238u and 228th. among thes ...	2012	23734458
erythrocytes and cell line-based assays to evaluate the cytoprotective activity of antioxidant components obtained from natural sources.	oxidative stress can damage cellular components including dna, proteins or lipids, and may cause several skin diseases. to protect from this damage and addressing consumer's appeal to natural products, antioxidants obtained from algal and vegetal extracts are being proposed as antioxidants to be incorporated into formulations. thus, the development of reliable, quick and economic in vitro methods to study the cytoactivity of these products is a meaningful requirement. a combination of erythrocyt ...	2014	24134852
assessment of dual life stage antiplasmodial activity of british seaweeds.	terrestrial plants have proven to be a prolific producer of clinically effective antimalarial drugs, but the antimalarial potential of seaweeds has been little explored. the main aim of this study was to assess the in vitro chemotherapeutical and prophylactic potential of the extracts of twenty-three seaweeds collected from the south coast of england against blood stage (bs) and liver stage (ls) plasmodium parasites. the majority (14) of the extracts were active against bs of p. falciparum, with ...	2013	24152562
ingestion and absorption of particles derived from different macrophyta in the cockle cerastoderma edule: effects of food ration.	we analyzed the capacity of the common cockle cerastoderma edule to utilize detrital food particles obtained from three different macrophytes: the vascular plant juncus maritimus and two green macroalgae (ulva lactuca and enteromorpha sp.). we measured feeding and digestive parameters at three concentrations of detritus (0.5, 1.0 and 3.0 mm(3) l(-1)), so that functional relationships between ingestive and digestive processes could be assessed. increasing concentrations of detritus (food) resulte ...	2014	24178188
marine macroalgae as a source for osmoprotection for escherichia coli.	at elevated osmolarity of the mineral medium m63, marine macroalgae constitute important osmoprotectants and nutrients sources for escherichia coli. growth of bacterial population (16 strains) was improved by supplementing m63 salts medium with either aqueous or ethanolic algal extracts obtained from ascophyllum nodosum, fucus serratus, enteromorpha ramulosa, ulva lactuca, and palmaria palmata. in their presence, growth was still observed even at 1.02 m nacl. furthermore, the e. coli zb400 growt ...	1995	24185483
evaluation of the proximate, fatty acid and mineral composition of representative green, brown and red seaweeds from the persian gulf of iran as potential food and feed resources.	the proximate, fatty acid and mineral composition were determined for green (ulva lactuca and enteromorpha intestinalis), brown (sargassum ilicifolium and colpomenia sinuosa) and red (hypnea valentiae and gracilaria corticata) seaweeds collected from the persian gulf of iran. results showed that the seaweeds were high in carbohydrate (31.8-59.1%, dry weight) and ash (12.4-29.9%) but low in lipid content (1.5-3.6%). the protein content of red or green seaweeds was significantly higher (p < 0.05) ...	2012	24293698
larvicidal activity against aedes aegypti and molluscicidal activity against biomphalaria glabrata of brazilian marine algae.	this study investigated the biological activities of five benthic marine algae collected from northeastern region of brazil. the tested activities included larvicidal activity against aedes aegypti, molluscicidal activity against biomphalaria glabrata, and toxicity against artemia salina. extracts of ulva lactuca (chlorophyta), padina gymnospora, sargassum vulgare (phaeophyta), hypnea musciformis, and digenea simplex (rhodophyta) were prepared using different solvents of increasing polarity, inc ...	2014	24688787
characterization of protein, lipid and mineral contents in common norwegian seaweeds and evaluation of their potential as food and feed.	the objectives of this study were to examine protein and amino acid composition, lipid and fatty acid composition, along with a range of essential minerals in common norwegian seaweed species representing the red (palmaria palmata and vertebrata lanosa), green (cladophora rupestris, enteromorpha intestinalis and ulva lactuca) and brown (alaria esculenta, laminaria digitata, laminaria hyperborea, fucus vesiculosus and pelvetia canaliculata) classes and assess their potential as alternatives to ce ...	2014	24700148
production of recombinant protein in escherichia coli cultured in extract from waste product alga, ulva lactuca.	this study examined the potential for waste product alga, ulva lactuca, to serve as a media component for recombinant protein production in escherichia coli. to facilitate this investigation, u. lactuca harvested from jamaica bay was dried, and nutrients acid extracted for use as a growth media. the e. coli cell line bl21(de3) was used to assess the effects on growth and production of recombinant green fluorescent protein (gfp). this study showed that media composed of acid extracts without furt ...	2014	24799463
seaweeds and plastic debris can influence the survival of faecal indicator organisms in beach environments.	the revised bathing water directive (rbwd) introduces more stringent standards for microbial water quality and promotes more pro-active management of the beach environment through the production of a bathing water profile (bwp). the aim of this study was to determine whether living seaweeds in the littoral zone are colonised by faecal indicator organisms (fios), and to quantify the survival dynamics of waterborne escherichia coli in microcosms containing senescing seaweeds. living seaweed (fucus ...	2014	24878304
deoxy-liquefaction of three different species of macroalgae to high-quality liquid oil.	three species of macroalgae (ulva lactuca, laminaria japonica and gelidium amansii) were converted into liquid oils via deoxy-liquefaction. the elemental analysis, ftir and gc-ms results showed that the three liquid oils were all mainly composed of aromatics, phenols, alkanes and alkenes, other oxygen-containing compounds, and some nitrogen-containing compounds though there were some differences in terms of their types or contents due to the different constituents in the macroalgae feedstocks. t ...	2014	25038506
community context mediates the top-down vs. bottom-up effects of grazers on rocky shores.	interactions between grazers and autotrophs are complex, including both top-down consumptive and bottom-up facilitative effects of grazers. thus, in addition to consuming autotrophs, herbivores can also enhance autotroph biomass by recycling limiting nutrients, thereby increasing nutrient availability. here, we evaluated these consumptive and facilitative interactions between snails (littorina littorea) and seaweeds (fucus vesiculosus and ulva lactuca) on a rocky shore. we partitioned herbivores ...	2014	25039210
chlorophyta and rhodophyta macroalgae: a source of health promoting phytochemicals.	a detailed study of the lipophilic composition of codium tomentosum, ulva lactuca, gracilaria vermiculophylla and chondrus crispus macroalgae cultivated in the portuguese coast was carried out by gas chromatography-mass spectrometry before and after alkaline hydrolysis. their long-chain aliphatic alcohols and monoglycerides compositions are reported for the first time. additionally, other new compounds were also identified: phytol and neophytadiene in c. tomentosum, u. lactuca and g. vermiculoph ...	2015	25863619
biological activities of two macroalgae from adriatic coast of montenegro.	in the present investigation the acetone extracts of macroalgae ulva lactuca and enteromorpha intestinalis were tested for antioxidant, antimicrobial and cytotoxic potential. antioxidant activity was evaluated by measuring the scavenging capacity of tested samples on dpph and superoxide anion radicals, reducing the power of samples and determination of total phenolic and flavonoid compounds in extracts. as a result of the study, u. lactuca extract was found to have a better free radical scavengi ...	2015	26150743
seaweed-synthesized silver nanoparticles: an eco-friendly tool in the fight against plasmodium falciparum and its vector anopheles stephensi?	malaria, the most widespread mosquito-borne disease, affects 350-500 million people each year. eco-friendly control tools against malaria vectors are urgently needed. this research proposed a novel method of plant-mediated synthesis of silver nanoparticles (agnp) using a cheap seaweed extract of ulva lactuca, acting as a reducing and capping agent. agnp were characterized by uv-vis spectrophotometry, fourier transform infrared (ftir) spectroscopy, energy-dispersive x-ray spectroscopy (edx), scan ...	2015	26227141
food web of the intertidal rocky shore of the west portuguese coast - determined by stable isotope analysis.	the characterization of food web structure, energy pathways and trophic linkages is essential for the understanding of ecosystem functioning. isotopic analysis was performed on food web components of the rocky intertidal ecosystem in four sites along the portuguese west coast. the aim was to 1) determine the general food web structure, 2) estimate the trophic level of the dominant organisms and 3) track the incorporation of organic carbon of different origins in the diet of the top consumers. in ...	2015	26275753
an evaluation of the toxicity and bioaccumulation of bismuth in the coastal environment using three species of macroalga.	bismuth is a heavy metal whose biogeochemical behaviour in the marine environment is poorly defined. in this study, we exposed three different species of macroalga (the chlorophyte, ulva lactuca, the phaeophyte, fucus vesiculosus, and the rhodophyte, chondrus crispus) to different concentrations of bi (up to 50 μg l(-1)) under controlled, laboratory conditions. after a period of 48-h, the phytotoxicity of bi was measured in terms of chlorophyll fluorescence quenching, and adsorption and internal ...	2016	26552530
essential and toxic elements in seaweeds for human consumption.	essential elements (k, ca, p, s, cl, mn, fe, cu, zn, ni, br, and i) and nonessential or toxic elements (al, ti, si, rb, sr, as, cd, sn, and pb) were determined by energy-dispersive polarized x-ray fluorescence spectrometry in 14 seaweeds purchased in local specialty stores in italy and consumed by humans. the differences in elements between the algae species reached up to 2-4 orders of magnitude. lithothamnium calcareum showed the highest levels of ca, al, si, fe, and ti. palmaria palmata showed ...	2016	26817952
biodiesel production from different algal oil using immobilized pure lipase and tailor made rpichia pastoris with cal a and cal b genes.	in this investigation, oil extraction was performed in marine macroalgae gracilaria edulis, enteromorpha compressa and ulva lactuca. the algal biomass was characterized by scanning electron microscopy and fourier transform-infra red spectroscopy. six different pre-treatment methods were carried out to evaluate the best method for maximum oil extraction. optimization of extraction parameters were performed and high oil yield was obtained at temperature 55°c, time 150min, particle size 0.10mm, sol ...	2016	26906444
effects of methanolic macroalgae extracts from caulerpa sertularioides and ulva lactuca on litopenaeus vannamei survival in the presence of vibrio bacteria.	macroalgae are potentially excellent sources of highly bioactive secondary metabolites that are useful for the development of new functional ingredients. this study was conducted to determine whether methanolic extracts from caulerpa sertularioides and ulva lactuca macroalgae might be possible alternatives for the prevention of shrimp vibriosis, which is caused by vibrio parahaemolyticus and vibrio alginolyticus. macroalgae extracts prepared with methanol as the solvent were evaluated for antiba ...	2016	26915309
antimicrobial activity of extracts from macroalgae ulva lactuca against clinically important staphylococci is impacted by lunar phase of macroalgae harvest.	staphylococcus aureus is a common human bacterial pathogen that causes skin and soft tissue infections. methicillin-resistant staph. aureus (mrsa) are increasingly drug-resistant, and thus there is great need for new therapeutics to treat staph. aureus infections. attention has focused on potential utility of natural products, such as extracts of marine macroalgae, as a source of novel antimicrobial compounds. the green macroalgae ulva lactuca produces compounds inhibitory to human pathogens, al ...	2016	26958825
comparative study on metal biosorption by two macroalgae in saline waters: single and ternary systems.	the biosorption capability of two marine macroalgae (green ulva lactuca and brown fucus vesiculosus) was evaluated in the removal of toxic metals (hg, cd and pb) from saline waters, under realistic conditions. results showed that, independently of the contamination scenario tested, both macroalgae have a remarkable capacity to biosorb hg and pb. in single-contaminant systems, by using only c.a. 500 mg of non-pre-treated algae biomass (size <200 μm) per litter, it was possible to achieve removal ...	2016	26961530
estimation of lipid hydroperoxide levels in tropical marine macroalgae.	the incipient levels of lipid hydroperoxides (lhpos) were determined in selected green, brown, and red macroalgae by the fox assay using hydroperoxy hplc mix. the lhpos contents varied between the investigated species and showed relatively low values in this study. among the greens, it varied from 12 ± 6.2 μg · g(-1) (codium sursum) to 31.5 ± 2.8 μg · g(-1) (ulva lactuca), whereas in reds, from 5.7 ± 1.6 μg · g(-1) (gracilaria corticata) to 46.2 ± 6 μg · g(-1) (sarconema filiforme), and in brown ...	2012	27009988
seasonality of selected nutritional constituents of edible delmarva seaweeds.	edible seaweeds have not been thoroughly explored for food, medicinal, or industrial purposes in the united states. this study compared selected proximate constituents of three edible seaweed species (ulva lactuca l., fucus vesiculosus l., and gracilaria tikvahiae mclachan) at two sites for possible future development as a food crop on the delmarva peninsula. sampling was conducted bimonthly at chincoteague memorial park, virginia, and indian river inlet, delaware, from 2005 to 2008. proximate c ...	2012	27011287
selection of yeast strains for bioethanol production from uk seaweeds.	macroalgae (seaweeds) are a promising feedstock for the production of third generation bioethanol, since they have high carbohydrate contents, contain little or no lignin and are available in abundance. however, seaweeds typically contain a more diverse array of monomeric sugars than are commonly present in feedstocks derived from lignocellulosic material which are currently used for bioethanol production. hence, identification of a suitable fermentative microorganism that can utilise the princi ...	2017	27057090
potential use of green macroalgae ulva lactuca as a feed supplement in diets on growth performance, feed utilization and body composition of the african catfish, clarias gariepinus.	this study aimed to evaluate the effects of diet containing the green macroalgae, ulva lactuca, on the growth performance, feed utilization and body composition of african catfish clarias gariepinus. four experimental diets were formulated: d1 as a control group and d2, d3 and d4 which included 10%, 20% and 30% u. lactuca meal, respectively. 180 african catfish, weighing 9.59 ± 0.43 g, and with an average length of 11.26 ± 0.21, (mean ± se) were divided into four groups corresponding to the diff ...	2016	27081367
identification and characterization of a library of surfactins and fengycins from a marine endophytic bacillus sp.	an endophytic bacterial strain from a marine green alga, ulva lactuca, was isolated and identified by 16s rrna gene sequencing method. the bacterial isolate was found to secrete two major families of cyclic depsilipopeptides, surfactins, and fengycins. sequencing of the isolated lipopeptides was carried out using the ms(n) data obtained from an electrospray ionization (esi) ion trap mass spectrometer coupled to an hplc system. the assigned sequences were confirmed by a chemical derivatization ap ...	2016	27160506
analgesic and anti-inflammatory actions on bradykinin route of a polysulfated fraction from alga ulva lactuca.	we investigated structural features of polysaccharides from ulva lactuca and their effects on the classical models of nociception and inflammation. crude extract was obtained by enzymatic digestion and isolated by ion exchange chromatography on deae-cellulose. the fraction with higher yield was used in the tests (sp-ul). swiss mice received sp-ul (1, 3 or 9mg/kg; i.v.), 30min prior to injection of 0.8%-acetic acid or 1%-formalin or prior to a thermal stimulus. at same doses, sp-ul was tested on ...	2016	27481342
extraction, structural characterization, and potential antioxidant activity of the polysaccharides from four seaweeds.	four seaweed polysaccharides were extracted from sarcodia ceylonensis, ulva lactuca l., gracilaria lemaneiformis, and durvillaea antarctica, respectively, by microwave-assisted extraction. the effect of three significant variables (extraction time, extraction temperature, and the ratio of water to raw material) on the process for extracting polysaccharides was investigated, along with the optimization of the extraction using the response surface method (rsm) with a box-behnken design. the polysa ...	2016	27916796
the effects of nitrogen pollutants on the isotopic signal (δ(15)n) of ulva lactuca: microcosm experiments.	effects of two chemical forms of nitrogen (nh4(+) and no3(-)) on δ(15)n in ulva lactuca were analysed separately and in mixture at two concentrations. we assessed whether the δ(15)n values of u. lactuca discriminate between nitrogen from synthetic fertilisers (inorganic) and from fresh cow manure (organic), and the isotopic ability of the macroalga to reflect nitrogen concentrations. isotopic signature and n content of the macroalga reflected different nitrogenous sources and their concentration ...	2017	28027782
differential toxic effects of ulva lactuca (chlorophyta) on the herbivorous gastropods, littorina littorea and l. obtusata (mollusca).	members of the genus ulva are widespread and abundant in intertidal and shallow subtidal areas but there are conflicting data regarding susceptibility to herbivory. while some studies have documented that ulva spp. were favored by a diversity of marine herbivores, other work has revealed herbivore deterrence. we investigated grazing and growth rates of the littorinid species, littorina littorea and l. obtusata, when offered fucus vesiculosus, ascophyllum nodosum, ulva lactuca, and chondrus crisp ...	2016	28028804
evaluation of the anticoagulant potential of polysaccharide-rich fractions extracted from macroalgae.	the aim of this study was to evaluate the potential anticoagulant activity of sulphated polysaccharide-containing extracts of six french edible marine macroalgae. aqueous extracts of brown (himanthalia elongata, laminaria digitata, ascophyllum nodosum, fucus vesiculosus), green (ulva lactuca) and red (chondrus crispus) macroalgae were prepared and their biochemical properties were determined, including major biomolecules, sulphate and ash contents. the anticoagulant activity of each extract was ...	2017	28147712