Sea Algae
Mostrando 1-12 de 40 artigos, teses e dissertações.
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1. Marine organisms as source of extracts to disrupt bacterial communication: bioguided isolation and identification of quorum sensing inhibitors from Ircinia felix
AbstractIn this study, 39 extracts from marine organisms were evaluated as quorum sensing inhibitors, collected in the Colombian Caribbean Sea and the Brazilian Coast including 26 sponges, seven soft corals, five algae and one zooanthid. The results showed that crude extracts from the soft coral Eunicea laciniata, and the sponges Svenzea tubulosa, Ircinia fe
Rev. bras. farmacogn.. Publicado em: 2015-06
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2. Using Macrocystis pyrifera (L.) C. Agardh from southern Chile as a source of applied biological compounds
The exploitation of seaweeds in Chile has been carried out for more than 60 years. More recently, seaweeds have been used for the production of alginate, agar and carrageenan, agricultural fertilizers and industrial aquaculture (feed for abalone and sea urchins), increasing the added value of this natural resource. In the Magellan Region (56ºS), the giant k
Revista Brasileira de Farmacognosia. Publicado em: 06/05/2011
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3. Toxic Effects of Benzo(a)pyrene on the Red Macroalga Gracilaria birdiae / Efeitos tóxicos de benzo(a)pireno sobre a macroalga vermelha Gracilaria birdiae
Algae show a great biodiversity and occupy many different ecological niches. Besides being essential for the maintenance that allow life on Earth, algae are on the basis of aquatic food chains and they suffer with continuous residue discharge that comes from different human activities. However, once algae are exposed to pollutants, biomarkers can indicate it
Publicado em: 2010
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4. Stripping voltammetric determination of cadmium in sea water using a carbon paste electrode modified with alginic acid from brown algae
A concentração do cádmio em um meio aquoso foi determinada usando-se um elétrodo de carbono ácido-modificado de pasta de alginina. O elétrodo de trabalho foi preparado usando-se uma mistura homogênea de pó de grafite, alginina ácida (AA) e óleo mineral. A voltametria de onda quadrada com redissolução anódica (SWASV) usando-se este elétrodo modi
Journal of the Brazilian Chemical Society. Publicado em: 2010
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5. Geobiologia do Atol das Rocas, Atlântico Sul Equatorial
This thesis approaches the geobiology of the only Atoll in the South Atlantic Ocean. Different classifications were made for Rocas Reef Complex along the nineteenth and twentieth century, which are evaluated historically. Biogeomorphological analysis and mapping of the reef units were done on the Rocas Atoll for the comprehension of the sedimentary dynamic a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2009
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6. Efeitos da radiação ultravioleta-b sobre a morfisiologia de kappaphycus alvarezii (DOTY) doty ex P. Silva (gigartinales) variantes pigmentares verde e vermelha
The effects of ultraviolet radiation in the biological relevant wavebands of UV-A (315#400 nm) and UV-B (280#315 nm) on algae have become an important issue as a man-made depletion of the protecting ozone layer has been reported. However, experimental designs to investigate this issue are manifold and the target organisms are extremely diverse. Data are incl
Publicado em: 2009
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7. Chemical and biological evaluation of Bostrychia radicans specimens (Rhodomelaceae) / Avaliação química e biológica de espécimens de Bostrychia radicans (Rhodomelaceae)
Macroalgas vermelhas da espécie Bostrychia radicans (Rhodomelaceae) foram coletadas em diferentes ecossistemas de Ubatuba, litoral norte do Estado de São Paulo, mais especificamente nos costões rochosos da Praia Dura e no manguezal do Rio Escuro. Os extratos e frações obtidos dos espécimes, provenientes das duas regiões, expressaram diferentes respost
Publicado em: 2009
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8. Distribuição e abundância da malacofauna epibentônica no Parracho de Maracajaú, RN, Brasil
The mollusks present a great taxon variety and life habits in coral reefs being good environmental indicators. It is important to know the distribution pattern of the mollusks and the processes that influence it, so that disturbances in sea ecosystems could be monitored. The present study aims to accomplish the inventory and distribution of epibenthic mollus
Publicado em: 2008
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9. Fucana magnetizada como suporte para imobilizaÃÃo de enzimas aplicadas na coagulaÃÃo do leite
O polissacarÃdeo fucana extraÃdo da alga Sargassum cymossum foi magnetizado e posteriormente usado como suporte para imobilizaÃÃo de enzimas coaguladoras do leite. A caracterizaÃÃo bÃsica da enzima imobilizada foi realizada pela determinaÃÃo da temperatura Ãtima, estabilidade tÃrmica, influÃncia do cloreto de cÃlcio na atividade coagulante do le
Publicado em: 2008
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10. Evaluación de la eficiencia fotosintética del fitoplancton en un lago amazónico (Lago Boa) y en un lago andino (Lago Guatavita)
Commonly relation between variable fluorescence and maximum fluorescence (Fv/Fm) of the algae community has been utilized like a measure of the phytoplanktonic photosynthetic efficiency. Such efficiency can be affected by the water bodies' location in different limnological provinces. The goal of this work was to establish the differences in the Fv/Fm rate b
Acta Amazonica. Publicado em: 2006
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11. Role of protein present in the ink released by-the-sea slug Aplysia dactylomela Rang in 1828 in defense mechanisms of the animal / Papel de proteínas presentes na tinta liberada pela lesma-do-mar Aplysia dactylomela Rang 1828 nos mecanismos de defesa do animal
The marine gastropod Aplysia dactylomela is known to release a purple ink when it is plagued. How has no external structure of protection, it is believed that secretion, rich in biologically active substances, participate in the chemical defense of the animal. The ink is composed of pigments, proteins and low molecular weight substances. The pigments of ink
Publicado em: 2005
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12. Sulfated fucan as support for antibiotic immobilization
Xylofucoglucuronan from Spatoglossum schröederi algae was tested as a support for antibiotic immobilization. The polysaccharide (20 mg in 6 ml) was first activated using carbodiimide, 1-ethyl-3-(3-dimethylamino-propyl)carbodiimide methiodide (20 mg in 2 ml), under stirring for 1 h at 25ºC and pH from 4.5 to 5.0. After adjusting the pH to 8.0, either gentam
Brazilian Journal of Medical and Biological Research. Publicado em: 2004-03