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| Registros recuperados: 26 | |
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| Burgos,Douglas Correia; Pereira,Sonia Maria Barreto; Bandeira-Pedrosa,Maria Elizabeth. |
| Este trabalho apresenta o levantamento florístico e alguns aspectos ecológicos das algas vermelhas do Arquipélago de São Pedro e São Paulo (00º56'N; 29º22'W - 00º 55'N; 29º 20'W). O material foi coletado durante as marés baixas em seis estações, nas zonas entre-marés e infralitoral no mês de outubro de 2003 (estação seca) e abril de 2005 (estação chuvosa). Foram registradas 24 espécies, distribuídas entre as ordens Bonnemaisoniales (uma espécie), Ceramiales (12 espécies), Corallinales (seis espécies), Erythropeltidales (uma espécie), Gelidiales (uma espécie), Rhodymeniales (duas espécies) e Stylonematales (uma espécie). Foram feitos 15 novos registros de rodofíceas à flora do Arquipélago e quatro novas adições para as ilhas oceânicas brasileiras: Ceramium... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Algas marinhas; Rhodophyta; Arquipélago; Brasil. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062009000400020 |
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| ALENCAR,DANIEL B. DE; SILVA,SUZETE R. DA; PIRES-CAVALCANTE,KELMA M.S.; LIMA,REBECA L. DE; PEREIRA JÚNIOR,FRANCISCO N.; SOUSA,MÁRCIA B. DE; VIANA,FRANCISCO A.; NAGANO,CELSO S.; NASCIMENTO,KYRIA S. DO; CAVADA,BENILDO S.; SAMPAIO,ALEXANDRE H.; SAKER-SAMPAIO,SILVANA. |
| Natural antioxidants found in marine macroalgae are bioactive compounds known to play an important role in the prevention of diseases associated with aging cells protecting them against the oxidative damage. The purpose of this study was to evaluate the antioxidant and cytotoxic activity of ethanolic extracts of two species of red seaweeds, Amansia multifida and Meristiella echinocarpa. In vitro antioxidant activity was determined by DPPH radical scavenging assay, ferric-reducing antioxidant power (FRAP) assay, ferrous ion chelating (FIC) assay, β-carotene bleaching (BCB) assay and total phenolic content (TPC) quantification. Cytotoxicity was evaluated with the brine shrimp Artemia sp. lethality test. The TPC values observed in the present study indicated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidant; Bioactive compounds; Cytotoxic; Phenolic compounds; Rhodophyta. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000100251 |
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| ALENCAR,DANIEL B. DE; DINIZ,JAÉCIO C.; ROCHA,SIMONE A.S.; PIRES-CAVALCANTE,KELMA M.S.; LIMA,REBECA L. DE; SOUSA,KAROLINA C. DE; FREITAS,JEFFERSON O.; BEZERRA,RAYSSA M.; BARACHO,BÁRBARA M.; SAMPAIO,ALEXANDRE H.; VIANA,FRANCISCO A.; SAKER-SAMPAIO,SILVANA. |
| ABSTRACT This study evaluated the chemical composition and antioxidant activity of fatty acids from the marine red algae Pterocladiella capillacea (S. G. Gmelin) Santelices & Hommersand 1997 and Osmundaria obtusiloba (C. Agardh) R. E. Norris 1991. The gas chromatography mass spectrometry (GC-MS) identified nine fatty acids in the two species. The major fatty acids of P. capillacea and O. obtusiloba were palmitic acid, oleic acid, arachidonic acid and eicosapentaenoic acid. The DPPH radical scavenging capacity of fatty acids was moderate ranging from 25.90% to 29.97%. Fatty acids from P. capillacea (31.18%) had a moderate ferrous ions chelating activity (FIC), while in O. obtusiloba (17.17%), was weak. The ferric reducing antioxidant power (FRAP) of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fatty acids; Antioxidant activity; Palmitic acid; Rhodophyta. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000100449 |
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| Nunes,José Marcos de Castro; Guimarães,Silvia Maria Pita de Beauclair. |
| Sete táxons de rodofíceas marinhas bentônicas são referidos pela primeira vez para o litoral brasileiro: Acrochaetium corymbiferum (Thur. in Le Jolis) Batters, A. liagorae Børgesen, Aglaothamnion herveyi (M. Howe) Aponte, D.L. Ballant. & J.N. Norris, Crouanophycus latiaxis (L.A. Abbott) Athanas., Grallatoria reptans M. Howe e Gelidiella sanctarum Feldmann & Hamel. Gelidiopsis repens (Kütz.) Weber Bosse é pela primeira vez referido para o Oceano Atlântico. As coletas foram realizadas no medio e infralitoral. O material está depositado no Herbário Alexandre Leal Costa. Referência da descrição original, basiônimo, descrição morfológica, distribuição geográfica e comentários taxonômicos são apresentados para cada táxon estudado. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rhodophyta; Novos registros; Brasil; Oceano Atlântico. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032008000400008 |
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| Amorim,Rodrigo das Neves dos Santos; Rodrigues,José Ariévilo Gurgel; Holanda,Márjory Lima; Quinderé,Ana Luíza Gomes; Paula,Regina Célia Monteiro de; Melo,Vânia Maria Maciel; Benevides,Norma Maria Barros. |
| The aim of this study was to determine the yield, chemical composition, specific rotation (SR), infrared (IR) spectroscopy and the effect on bacterial growth of a crude sulfated polysaccharide (SP) from the red marine alga G. ornata (Go). Go-1 (25°C), Go-2 (80°C), and Go-3 (80°C) were sequentially extracted and yielded 9.2%. The contents of sulfate (5.88-10.3%) and proteins (0.1-3.7%) were small. The values of SR were [µ]D20°f -19.0, -51.0, and -56.5, respectively. IR spectrums showed the presence of galactose-4 sulfate and absence of 3,6-anydrogalactose-2 sulfate, galactose-6 sulfate and galactose-2 sulfate. SR and IR techniques confirmed SPs. Go-3 was tested on the growth of bacteria (Bacillus subtilis, Staphylococcus aureus, Enterobacter aerogens,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rhodophyta; Sulfated macromolecules; Chemical analysis; Antimicrobial. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000200001 |
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| Bittner, Lucie; Halary, Sebastien; Payri, Claude; Cruaud, Corinne; De Reviers, Bruno; Lopez, Philippe; Bapteste, Eric. |
| Background: Improving knowledge of biodiversity will benefit conservation biology, enhance bioremediation studies, and could lead to new medical treatments. However there is no standard approach to estimate and to compare the diversity of different environments, or to study its past, and possibly, future evolution. Presentation of the hypothesis: We argue that there are two conditions for significant progress in the identification and quantification of biodiversity. First, integrative metagenomic studies - aiming at the simultaneous examination (or even better at the integration) of observations about the elements, functions and evolutionary processes captured by the massive sequencing of multiple markers - should be preferred over DNA barcoding projects... |
| Tipo: Text |
Palavras-chave: Microbial diversity; Species concept; Dna barcodes; Ecological perspective; Community; Functional analysis; Rhodophyta; Systematics; Fragments; Taxonomy. |
| Ano: 2010 |
URL: https://archimer.ifremer.fr/doc/00202/31321/29733.pdf |
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| Lalegerie, Fanny; Lajili, Sirine; Bedoux, Gilles; Taupin, Laure; Stiger-pouvreau, Valerie; Connan, Solène. |
| To cope with the biotic and abiotic stresses experienced within their environment, marine macroalgae have developed certain defence mechanisms including the synthesis of photo-protective molecules against light and particularly harmful UV radiation. The aim of this study was to screen selected red algae, a highly diverse phylogenetic group, for the production of photo-protective molecules. The pigment content and composition (i.e. chlorophyll-a, phycobiliproteins and carotenoids) and the composition of mycosporine-like amino acids (MAAs) were studied in 40 species of red macroalgae collected in Brittany (France), at two distinct periods (i.e. February and July 2017). A high inter-specific variability was demonstrated in terms of pigment content and MAA... |
| Tipo: Text |
Palavras-chave: Algae; Diversity; HPLC; MAAs; Metabolites; Photo-protection; Pigments; Rhodophyta; Screening. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00488/59929/63133.pdf |
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| Jong, Yde S.D.M. de; Hitipeuw, Creusa; Prud’homme van Reine, Willem F.. |
| A cladistic analysis, based on a taxonomic revision is carried out for 7 Acanthophora species using 19 characters. Hypotheses on species affinities are based primarily on morphological characters. Because most species show only few distinctive characters, emphasis was placed on features of spine development, either in relation to vegetative or to reproductive structures. Global distribution of 7 Acanthophora species: viz. A. aokii, A. dendroides, A. muscoides, A. nayadiformis, A. pacifica, A. ramulosa, and A. spicifera, shows a discontinuous pattern. Although widely distributed species are present (A. muscoides and A. spicifera), a disjunct distribution of other species occurs in the Pacific (A. aokii), Indian Ocean (A. dendroides), East-Atlantic region... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Rhodomelaceae; Rhodophyta; Biogeography; Phylogenetics; Seaweeds; Taxonomy. |
| Ano: 1999 |
URL: http://www.repository.naturalis.nl/record/525490 |
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| Guimarães,Silvia M.P.B.; Horta,Paulo A.. |
| The coast of Espirito Santo State is located in a biogeographic transition zone presenting high diversity. A renewed interest in this region occurred in the 1990s, resulting in various new records and new species descriptions added to the Brazilian marine flora. The study of the infralitoral of this region is just beginning, and a detailed exploration with use of Scuba diving is revealing a flora containing many little-known taxa, particularly of red algae. As a first result, Predaea feldmannii Børgesen is being described for the Brazilian coast. The occurrence of the genus Predaea in Brazil has been considered with restriction since representatives of this genus had been referred only once by Howe & Taylor in 1931, being first considered as... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Morphology; Nemastomataceae; Predaea; Rhodophyta; Taxonomy. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042004000300010 |
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| Registros recuperados: 26 | |
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