Skip to search form Skip to main content You are currently offline. Some features of the site may not work correctly. DOI: The aim of this work is focused on the extraction and characterization of the Brazilian seaweed Sargassum filipendula alginate.
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Directory of Open Access Journals Sweden. Full Text Available Invasive species can alter coastal ecosystems both directly, e. Previous studies have shown that invasive algae can modify native habitat architecture, disrupt intricately linked food webs and alter epibiotic assemblages.
In the UK, the seagrass Zostera marina supports a diverse epibiotic assemblage, influencing key factors such as sediment dynamics, depositional regime and trophic linkages.
Increasing encroachment of the invasive alga Sargassum muticum into seagrass meadows changes the physical and chemical characteristics of the local environment and creates the potential for changes in the epibionts associated with the seagrass blades, threatening the integrity of the seagrass ecosystem.
We investigated the effects of S. Epibiota were weighed, identified to the most detailed operational taxonomic unit OTU possible, and unitary organisms were enumerated. Linear mixed effects models indicated that differences in epibiota assemblage composition were not reflected as significant differences in mean biomass per sample, or number of epibiont OTUs per sample.
We conclude that S. Thus S. Veinte cabras hembras Nubia en crecimiento 43 semanasse distribuyeron aleatoriamente en dos grupos de 10 cabras y se alojaron en corraletas individuales. No se encontraron diferencias significativas en el peso corporal 8.
The nutritive value of seaweed Sargassum spp. Twenty female Nubian goats weeks old were randomly distributed into two groups of 10 goats each and were housed in individual pens. Feed and water intake were recorded daily and individually for 60 days. The weight of each goat was recorded every 15 days. The nutritional content of Sargassum spp. Fiber fractions. Agardh against Dysdercus cingulatus Fab.
Agardh contra Dysdercus cingulatus Fab. Agardh, against Dysdercus cingulatus Fab. Sargassum tenerrimum has been used as a source of fertilizers and drugs, but there is no information available in the literature about its use in ecofriendly pest management. Adult longevity of both males and females was reduced by the CH and BE extracts. The CH extract reduced D. Females emerging from the BE category could not lay eggs. All the extracts significantly reduced both total body protein and genomic DNA content.
However, these fractions did not significantly alter the nymphal developmental period. Results indicate that these seaweed extracts can be used as biopesticides for pest management. Agardh, contra Dysdercus cingulatus Fab. Las especies algales que mostraron actividad antibacteriana fueron: Acanthophora sp. Los resultados obtenidos permiten concluir que las algas de la costa occidental de Venezuela, presentan compuestos bioactivos con actividad antibacteriana.
Drifting algae and fish: Implications of tropical Sargassum invasion due to ocean warming in western Japan. Evidence is accumulating that the invasion and extinction of habitat-forming seaweed species alters coastal community structure and ecological services, but their effects on the pelagic environment have been largely ignored. Thus, we examined the seasonal occurrence patterns of indigenous temperate and invasive tropical drifting algae and associated fish species every month for 2 years in western Japan Tosa Bay , where a rapid shift from temperate to tropical Sargassum species has been occurring in the coastal area since the late s due to rising seawater temperatures.
Of the 19 Sargassum species Drifting temperate algae were abundantly present from late winter to summer, whereas tropical algal clumps occurred primarily during summer. In the warm season, fish assemblages did not differ significantly between drifting temperate and tropical algae , suggesting the low host-algal specificity of most fishes.
We also found that yellowtail juveniles frequently aggregated with drifting temperate algae from late winter to spring when drifting tropical algae were unavailable. Local fishermen collect these juveniles for use as aquaculture seed stock; therefore, the occurrence of drifting temperate algae in early spring is important for local fisheries. These results suggest that the further extinction of temperate Sargassum spp.
Thraustochytrid and fungal component of marine detritus. Field studies on decomposition of the brown alga Sargassum cinereum J. Thraustochytrid protists and fungi were isolated and enumerated in culture from detritus of the brown alga Sargassum cinereum. Both groups occurred epi- and endobiontically in the detritus. The thraustochytrid Labyrinthuloides minuta occurred Extraction of alginate biopolymer present in marine alga sargassum filipendula and bioadsorption of metallic ions.
The objective is to evaluate the importance of this biopolymer in removing different metallic ions by the marine alga S.
The toxicity of brown algae Sargassum sp extract to mice Mus muscullus. Full Text Available Indonesian is a country with very large and overflow marine biological resources. Utilization of seaweed has been developed and become a source of revenue for Indonesian who live in coastal areas with high potential for seaweed.
The demand of seaweed in the world increases as increasing in the use of seaweed for various purposeamong others in the fields of industry, food, textile, paper, paints, cosmetics, medical and pharmaceutical field. Alginate is one of materials that commonly used in the field of dentistry as printed materials to create study models.
Materials in the field of dentistry must be biocompatible to the oral cavity tissues. The research perform experimental laboratory research type withexperimental post-tes-only control group design. The reseach samples applyfemales white mice Mus muscullus. Research samples divided into 5 groups of 5 female mices for each treatment group. Compound 1 was identified on the basis of nuclear magnetic resonance NMR and mass spectrometry MS analysis, and the absolute stereochemistry was defined by NOESY spectroscopy, minimizing energy calculation, and circular dichroism CD spectra.
The known compounds 2—8, isolated from S. Compound 6 was tested for its inhibitory activity against protein tyrosine phosphatase 1B PTP1B, antioxidant activity with 1,1-diphylpicrylhydrazyl DPPH free radicals, and antimicrobial activity against resistant clinical isolates of Candida albicans, methicillin-resistant Staphylococcus aureus MRSA, and Escherichia coli.
In vitro antioxidant properties of sulfated polysaccharide from brown marine algae Sargassum tenerrimum. Results: The extract showed higher percentage of carbohydrate 8.
The free radical scavenging potential was found to be higher in ABTS The characterization of sulfated polysaccharide by FT-IR spectrum showed the presence of carboxyl, hydroxyl and sulfate groups.
The structure of mobility was assed by agarose gel electrophoresis which showed highest mobility at higher pH values especially in buffer carbonate -bicarbonate pH The molecular weight of the sulfated polysaccharide was determined by gradient polyacrylamide gel electrophoresis which was found to be 40 kDa.
The overall results have established that the sulfated polysaccharide from S. Conclusion: Physico-chemical analysis and elemental analysis of crude seaweed polysaccharide from Sargassum tenerrimum a brown algae elicited the antioxidant activity. Potential contribution of surface-dwelling Sargassum algae to deep-sea ecosystems in the southern North Atlantic.
Deep-sea ecosystems, limited by their inability to use primary production as a source of carbon, rely on other sources to maintain life. To determine the potential for this carbon flux, a literature survey of previous studies that estimated the abundance of surface water Sargassum was conducted. We compared these estimates with quantitative analyses of sedimented Sargassum appearing on photos taken with an autonomous underwater vehicle AUV directly above the abyssal sediment during the expedition.
Organismal communities associated to Sargassum fluitans from surface waters were investigated and Sargassum samples collected from surface waters and the deep sea were biochemically analyzed fatty acids, stable isotopes, C:N ratios to determine degradation potential and the trophic significance within deep-sea communities. The estimated Sargassum biomass fresh weight in the deep sea 0.
Biochemical analysis showed degradation of Sargassum occurring during sedimentation or in the deep sea, however, fatty acid and stable isotope analysis did not indicate direct trophic interactions between the algae and benthic organisms. Thus, it is assumed that components of the deep-sea microbial food web form an important link between the macroalgae and larger benthic organisms.
Evaluation of the epifauna showed a diverse nano- micro-, meio, and macrofauna on surface Sargassum and maybe transported across the Atlantic, but we had no evidence for a vertical exchange of fauna components. The large-scale sedimentation of Sargassum forms an important trophic link. Propiedades nutritivas y saludables de algas marinas y su potencialidad como ingrediente funcional.
Full Text Available Background:The marine environment is a unique source of bioactive natural products, of which Sargassum muticum Yendo Fensholt is an important brown algae distributed in Jeju Island, Korea. However, the active ingredients from S. Methods:Bioguided fractionation of the ethanolic extract of S. Its structure was determined by analysis of the spectroscopic data. In vitro anti-inflammatory activity and mechanisms of action of this compound were examined using lipopolysaccharide LPS-stimulated RAW Phlorotannins are a group of complex polymers of phloroglucinol 1,3,5-trihydroxybenzene , which are unique compounds from marine brown algae.
In our present study, a procedure for extraction and enrichment of phlorotannins from S. After comparison of different extraction methods, the optimal extraction conditions were established as follows. After extraction, the phlorotannins were fractioned by different solvents, among which the ethyl acetate fraction exhibited both the highest total phlorotannin content Compounds with 42 different molecular weights were detected and tentatively identified, among which the fuhalol-type phlorotannins were the dominant compounds, followed by phlorethols and fucophlorethols with diverse degree of polymerization.
Eckol-type phlorotannins including some newly discovered carmalol derivatives were detected in Sargassum species for the first time. Our study not only described the complex phlorotannins composition in S. Full Text Available Phlorotannins are a group of complex polymers of phloroglucinol 1,3,5-trihydroxybenzene, which are unique compounds from marine brown algae.
The role of chemical antifouling defence in the invasion success of Sargassum muticum: A comparison of native and invasive brown algae. Full Text Available Competition and fouling defence are important traits that may facilitate invasions by non-indigenous species. The 'novel weapons hypothesis' NWH predicts that the invasive success of exotic species is closely linked to the possession of chemical defence compounds that the recipient community in the new range is not adapted to.
In order to assess whether chemical defence traits contribute to invasion success, anti-bacterial, anti-quorum sensing, anti-diatom, anti-larval and anti-algal properties were investigated for the following algae : a the invasive brown alga Sargassum muticum from both, its native Japan and invasive Germany range, b the two non- or weak invasive species Sargassum fusiforme and Sargassum horneri from Japan, and c Fucus vesiculosus, a native brown alga from Germany.
Crude and surface extracts and lipid fractions of active extracts were tested against common fouling organisms and zygotes of a dominant competing brown alga. Extracts of the native brown alga F. However, Sargassum spp. Overall, extracts of S.
Sargassum filipendula alginate from Brazil: seasonal influence and characteristics.
Skip to search form Skip to main content You are currently offline. Some features of the site may not work correctly. DOI: An analysis of the vegetative and reproductive anatomy of Sargassum lapazeanum was performed based on extensive sampling in three areas within its geographical range: a San Juan de la Costa, b Punta Calera, c Punta Machos. Material was collected from low intertidal to subtidal populations and evaluated based on variations present within and between populations. Our goal was to comprehensively analyze the features of the vegetative and reproductive anatomy of this species.
Quantitative variables applied to phenological studies of Sargassum vulgare C. Maria Teresa M. The suitability of quantitative variables for phenological studies was evaluated in a population of the brown seaweed Sargassum vulgare from "Praia das Gordas", Angra dos Reis, Ilha Grande Bay, state of Rio de Janeiro. From June to May , twenty adult individuals were randomly sampled at bimonthly intervals. Fifteen variables related to the vegetative and reproductive development of perennial and non-perennial parts of the individuals were quantified. Variables related to the non-perennial parts were more useful than those related to the perennial parts, because they showed a clear variation over the year.