Marine Macroalgae
Mostrando 13-24 de 31 artigos, teses e dissertações.
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13. Estudos de Cultura de Tecidos, In Vitro, de Macroalgas Marinhas da EspÃcie Gracilaria birdiae / Studies of Tissue Culture, In Vitro, in marine macroalgae Gracilaria Species birdiae
Macroalgas marinhas constituem um recurso vital para a economia de diversos paÃses e tem sido exploradas ao redor do globo devido a sua capacidade de produÃÃo de fico colÃides como o Ãgar, carragenina e alginatos, bem como pelo seu espectro de utilizaÃÃo, seja na indÃstria de alimentos, de fertilizantes e na medicina. Estudos sobre a induÃÃo, culti
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/01/2008
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14. AvaliaÃÃo sazonal de carotenÃides provitamina A (αâ e βâ caroteno) e vitamina E (αâtocoferol) em macroalgas marinhas pertencentes a famÃlia Caulerpacea (DivisÃo Chlorophyta) / Evaluation of seasonal provitamin A carotenoids (α-and β-carotene) and Vitamin E (α-tocopherol) in marine macroalgae belonging to the family Caulerpacea (Division Chlorophyta)
As algas marinhas sÃo fontes de uma grande variedade de compostos benÃficos para o homem, dentre os quais se destacam os minerais, as fibras dietÃrias e as vitaminas (A, B, C e E). O objetivo deste trabalho foi verificar a existÃncia de variaÃÃo sazonal nos teores de α- e β-caroteno (carotenÃides provitamina A) e de α-tocoferol (vitamin
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/12/2007
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15. Molecular characterization of nitrate reductase gene and it expression in the marine red alga Gracilaria tenuistipitata (Rhodophyta) / Aspectos moleculares de nitrato redutase da macroalga marinha Gracilaria tenuistipitata (RHODOPHYTA): seqüenciamento do gene e estudo da expressão do RNA mensageiro
In the marine environment, the major source of nitrogen is nitrate, which must be reduced before incorporation into organic compounds, such as amino acids and nitrogen bases (purines and pyrimidines). The first enzyme that participates in the nitrogen assimilation process is nitrate reductase (NR), which is responsible for the conversion of nitrate to nitrit
Publicado em: 2006
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16. ExtraÃÃo e quantificaÃÃo de α-Caroteno, β-Caroteno e α-Tocoferol em macroalgas marinhas utilizando cromatografia lÃquida de alta eficiÃncia em fase reversa / Extraction and quantification of α-carotene, β-carotene and α-tocopherol in marine macroalgae using high performance liquid chromatography reverse phase
O objetivo deste trabalho foi avaliar o potencial de 32 espÃcies de algas marinhas das divisÃes Chlorophyta, Rhodophyta e Phaeophyta como fontes de α-, β-caroteno e α-tocoferol. Todas as Chlorophyta apresentaram α- e β-caroteno. O teor de α-caroteno variou de 0,814 Â 0,256 a 71,378 Â 3,550 μg.g -1 peso fresco, sendo mai
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/08/2005
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17. NÃveis de concentraÃÃes de metais pesados em macroalgas e em sedimentos marinhos do Estado de Pernambuco - Brasil
The strong industrial and agricultural activities in Pernambuco State are contributing heavily to the contamination of the coastal waters with heavy metals and unfortunetly it is increasing constantly. As this subject is explored in many aspects and as there exists already a great production of papers, in order to diagnostic the present situation and to sugg
Publicado em: 2004
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18. Análise da associação bactéria-macroalgas em ambiente marinho e do seu potencial uso na avaliação ambiental.
Nas áreas costeiras um aumento na quantidade de nutrientes, particularmente nitrogênio e fósforo, tem levando à eutrofização com alterações pronunciadas nos ecossistemas. O enriquecimento por nutrientes nos ambientes costeiros é freqüentemente acompanhado pela entrada de poluentes, como os metais pesados. A utilização de macroalgas e de bactéria
Publicado em: 2003
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19. Fenóis halogenados e/ou sulfatados de macroalgas marinhas
During the biological evolution, marine macroalgae have developed biochemicals tools in order to utilize components of seawater such as sulfates and halogens, to produce a variety of chemicals (secondary metabolites).This review shows and discuss the occurrence of sulfated and/or halogenated phenolic compounds in seaweeds.
Química Nova. Publicado em: 2000-12
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20. Cytochrome P450 Monooxygenases for Fatty Acids and Xenobiotics in Marine Macroalgae1
The metabolism of xenobiotics has mainly been investigated in higher plant species. We studied them in various marine macroalgae of the phyla Chlorophyta, Chromophyta, and Rhodophyta. Microsomes contained high oxidative activities for known cytochrome (Cyt) P450 substrates (fatty acids, cinnamic acid, 3- and 4-chlorobiphenyl, 2,3-dichlorobiphenyl, and
American Society of Plant Physiologists.
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21. Alternative Methods of Photosynthetic Carbon Assimilation in Marine Macroalgae 1
Two green macroalgae, Codium decorticatum and Udotea flabellum, differ photosynthetically. Codium had high O2-sensitive, and Udotea low O2-insensitive, CO2 compensation points; Codium showed a Warburg effect at seawater dissolved inorganic carbon levels and had photorespiratory CO2 release, whereas Udotea did not. Seawater dissolved inorganic carbon levels d
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22. The sequence of the plastid encoded rpl22 protein in marine macroalgae, Gracilaria tenuistipitata.
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23. Isolation of a Unique Marine Bacterium Capable of Growth on a Wide Variety of Polysaccharides from Macroalgae
A unique marine bacterium has been isolated which can be cultured on a variety of polysaccharides and cell wall preparations from red and brown algae.
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24. Evidence for the Occurrence of Specific Iron (III)-Binding Compounds in Near-Shore Marine Ecosystems
Aqueous extracts of samples from representative types of near-shore marine ecosystems were examined for growth-promoting activity for the siderochrome auxotroph, Arthrobacter JG-9. Blue-green algal mat and sea grass samples gave strongly positive responses. Relative to Desferal (Ciba Pharmaceutical Co., Summit, N.J.), concentrations up to 110 ng/g (wet weigh