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| Registros recuperados: 138 | |
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| Perfeto,Paulo Nelo Medeiros. |
| In Grateloupia doryphora and Gymnogongrus griffithsiae the seasonal variation of their chemical compounds was studied, establishing a relation with the physical and chemical properties of seawater. High values of proteins in the studied species were detected during the winter, 28.88% in G. doryphora and 26.68% in G. griffithsiae, corresponding to the maximum period of ammonium concentration in the marine environment. The variation in carbohydrates content showed an inverse relation with the proteins, with a maximum of 54.72% in G. doryphora and of 55.36% in G. griffithsiae, both in summer, positively correlated with salinity and temperature of sea water. Lipids content was low in both species. In G. doryphora the values ranged between 0.81 and 1.30% and,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Algae; Proteins; Carbohidrates; Lipids; Ashes; Nitrogen; Phosphorus; Potassium. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33061998000100006 |
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| Lobo,Eduardo A; Torgan,Lezilda Carvalho. |
| Através da análise da composição específica e da diversidade da comunidade de diatomáceas, em duas estações do sistema Guaíba (RS, Brasil), nos meses de setembro e novembro de 1975, foi encontrada uma diferença significativa na estrutura dessa comunidade. Essa diferença deve-se, provavelmente, à presença exclusiva de Achnanthes inflata (Kütz.) Grun. var. elata (Leud. - Fort.)Hust., A. lanceolata (Bréb.)Grun. var. lanceolata, Cocconeis placentula Ehr., Cyclotella meneghiniana Kütz., Cymbella minuta Hilse ex Rabh., Aulacosira distans (Ehr.) Sim., Navicula mutica Kütz., Surirella robusta Ehr. var. splendida (Ehr.) Van Heurck, Synedra ulna (Nitz.)Ehr., espécies abundantes, que refletem características ambientais distintas, pelo fato de apresentarem uma... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Algae; Bacillariophyceae; Structure of community. |
| Ano: 1987 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33061987000300011 |
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| Biolo,Stefania; Bueno,Norma Catarina; Siqueira,Natália Silveira; Moresco,Carina. |
| This work is part of a survey of the desmid flora in a tributary of the Itaipu Reservoir, in the state of Paraná, Brazil. The objective was to expand the knowledge base regarding the genus Cosmarium (Desmidiaceae, Zygnematophyceae). We conducted a qualitative analysis of 60 samples of phytoplankton, which were collected from along the banks of the São Francisco Falso River between July of 2003 and June of 2004. We identified, drew, and described 18 taxa of Cosmarium. Of those 18 taxa, 8 represent new records for the state of Paraná: C. angulosum Bréb. var. angulosum, C. bireme Nordst. var. bireme, C. clepsydra Nordst. var. clepsydra, C. cf. galeritum Nordst. var. borgei, C. ginzbergeri, C. norimbergense Reinsch var. norimbergense, C. protractum (Nägeli) De... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Algae; Desmids; Phytoplankton; Taxonomy. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000100001 |
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| Cunha,Elane Domênica de Souza; Cunha,Alan Cavalcanti da; Silveira Jr,Arialdo Martins da; Faustino,Silvia Maria Mathes. |
| During the various hydrological periods in 2011, we studied the phytoplankton along an 87-km stretch of the Araguari and Falsino rivers, which are located in the eastern Brazilian Amazon, in the state of Amapá, Brazil, the most ecologically preserved state in the country. In the study area, the aquatic ecosystem is under pressure from human activities such as, mining, hydroelectric power generation and urbanization, which contrast with the surrounding areas that are designated for biodiversity conservation. The aim of this study was to characterize the composition, frequency and richness of algae species and also to identify spatial-temporal patterns of taxa distribution. During the study period, we identified 185 taxa (136 species in 49 genera). The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Algae; Amapá; Floristic survey; Reservoir; River. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000200011 |
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| OLIVEIRA,ANTÔNIA S. DE; LÓSSIO,CLÁUDIA F.; RANGEL,ANNE J.; MARTINS,MARIA G.Q.; NASCIMENTO,FERNANDO E.P. DO; ANDRADE,MARIA L.L. DE; CAVADA,BENILDO S.; LACERDA,SÍRLEIS R.; NASCIMENTO,KYRIA S. DO. |
| ABSTRACT Freshwater algae are rich sources of structurally biologically active metabolites, such as fatty acids, steroids, carotenoids and polysaccharides. Among these metabolites, lectins stand out. Lectins are proteins or glycoproteins of non-immune origin which bind to carbohydrates or glycoconjugates, without changing ligand structure. Many studies have reported on the use of Spirogyra spp. as effective bioindicators of heavy metals; however, reports on Spirogyra molecular bioprospecting are quite limited. Therefore, this study aimed to detect, isolate, purify and characterize a lectin present in the freshwater green algae Spirogyra. Presence of the lectin protein in the extract was detected by hemagglutination assays. Subsequently, the protein extract... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Algae; Characterization; Lectin; Purification. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000502113 |
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| Assis,Gisele Fernanda Pereira; Silva,Samiris Pereira da; Silva,Ludmylla Fernanda de Siqueira; Costa,Regiane Luiza da; Fonseca,Luany Weiler da; De-Lamonica-Freire,Ermelinda Maria; Figueiredo,Daniela Maimoni de; Oliveira,Márcia Teixeira de. |
| Abstract: Cyanobacteria and microalgae make up a very diverse group and exhibit diverse morphological, biochemical and physiological differences. The knowledge of these organisms that inhabit epicontinental waters in Brazil is extremely heterogeneous in relation to the geographic region and the taxonomic group. Taxonomically there is much more knowledge about the algae of the South and Southeast regions of the country than there is about the algae of the North and Central-West regions. Therefore, this research presents a revised and updated knowledge of the algae that occur in the National Park of the Chapada dos Guimarães (PNCG) and surrounding areas. Our area of study is located in the state of Mato Grosso, in the center-west region of Brazil. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cerrado; Algae; Planktothrix; Taxonomy; Streams. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000200311 |
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| Pádua,Márcia de; Fontoura,Paulo Sérgio Growoski; Mathias,Alvaro Luiz. |
| Chemical composition of three species of Chlorophyta, Ulva lactuca, Ulva fasciata and Ulvaria oxysperma, was determined. Ulvaria oxysperma showed humidity (16-20%), ash (17-31% dry-base), proteins (6-10%db), lipids (0.5-3.2%db), fibers (3-12%db) and carbohydrates (46-72%db) which corresponded to 192-270 kcal.100g-1 (wet-base). U lactuca (15-18%db) and U fasciata (13-16%db) revealed grades slightly higher for proteins, but with similar energetic contents (250-272 and 225-239 kcal.100g-1), respectively. Natural blades of U lactuca and of U fasciata were more rigid than blades of U oxysperma. Other native algae showed higher protein levels. Ulvaria sp could be cultivated on the cotton-nylon net without having significance competition from other algae or... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chemical composition; Algae; Ulvaria; Ulva; Guaraqueçaba; Ilha do Mel. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000100007 |
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| Namjooyan,Foroogh; Farasat,Massoumeh; Alishahi,Mojtaba; Jahangiri,Alireza; Mousavi,Hamideh. |
| Abstract Melanogenesis is a biological process which led to the synthesis of melanin pigment. Abnormal melanin production results in melasma, solar lentigo, post inflammatory melanoderma, etc. In this study, we examined the potential inhibitory effects of 17 brown macroalgae from Persian Gulf on melanogenesis. The effects of various concentrations (100, 250 and 500 µg/mL) of methanolic extracts of macroalgae belonging to four genera (including: Padina, Colpomonia, Cystoseira and Sargassum) were studied on oxidation of L-Dopa by mushroom tyrosinase. Subsequently, the activity of macroalgae with high inhibitory effect on monophenolase activity of mushroom tyrosinase and zebrafish was investigated using L-tyrosine as a substrate. Anti-melanogenesis effects of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Algae; Persian Gulf; Melanogenesis; Mushroom tyrosinase; Zebrafish. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100301 |
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| Silva,L.B.; Santos,S.S.S.; Azevedo,C.R.; Cruz,M.A.L.; Venâncio,T.M.; Cavalcante,C.P.; Uchôa,A.F.; Astolfi Filho,S.; Oliveira,A.E.A.; Fernandes,K.V.S.; Xavier-Filho,J.. |
| We report the detection of insulin-like antigens in a large range of species utilizing a modified ELISA plate assay and Western blotting. We tested the leaves or aerial parts of species of Rhodophyta (red alga), Bryophyta (mosses), Psilophyta (whisk ferns), Lycopodophyta (club mosses), Sphenopsida (horsetails), gymnosperms, and angiosperms, including monocots and dicots. We also studied species of fungi and a cyanobacterium, Spirulina maxima. The wide distribution of insulin-like antigens, which in some cases present the same electrophoretic mobility as bovine insulin, together with results recently published by us on the amino acid sequence of an insulin isolated from the seed coat of jack bean (Canavalia ensiformis) and from the developing fruits of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insulin; Insulin-like; Antigens; Evolution; Plants; Cyanobacteria; Algae; Fungi. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002000300004 |
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| Vieira,L.A.P.; Freitas,A.L.P.; Feitosa,J.P.A.; Silva,D.C.; Viana,G.S.B.. |
| Bryothamnion seaforthii, a red alga common to the Northeastern coast of Brazil, was used to prepare the protein fraction F0/60 by ammonium sulfate precipitation. The chromatography of F0/60 on DEAE-Sephadel column resulted in two lectin fractions, PI and PII, which have antinociceptive properties in rodents. We determined the antinociceptive activity of the PII fraction and of a carbohydrate-containing fraction (CF) in mice. The CF was prepared from the dried algae, after digestion with 100 mM sodium acetate, pH 6.0, containing 5 mM cysteine, EDTA and 0.4% papain, at 60ºC. A 10% cetylpyridinium chloride was added to the filtrate, and the precipitate was dissolved with 2 M NaCl:ethanol (100:15, v/v) followed by the carbohydrate precipitation with ethanol.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Algae; Antinociceptive activity; Carbohydrate; Bryothamnion seaforthii. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000700017 |
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| Gunasekaran,B.; Gothandam,K.M.. |
| For a long time, vaccines have been the main mode of defense and protection against several bacterial, viral, and parasitic diseases. However, the process of production and purification makes them expensive and unaffordable to many developing nations. An edible vaccine is when the antigen is expressed in the edible part of the plant. This reduces the cost of production of the vaccine because of ease of culturing. In this article, various types of edible vaccines that include algal and probiotics in addition to plants are discussed. Various diseases against which research has been carried out are also reviewed. This article focused on the conception of edible vaccines highlighting the various ways by which vaccines can be delivered. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vaccines; Plants; Algae; Probiotics; Edible vaccine. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2020000200301 |
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| Lima-Filho,José Vitor M.; Carvalho,Ana F.F.U.; Freitas,Sissi M.; Melo,Vânia M.M.. |
| Hexane, chloroform and ethanol extracts of six marine macroalgae (Rhodophyta and Chlorophyta) from North Ceará coast (Northeast Brazil) were evaluated for antibacterial activity by the single disk method. Best results were shown by the hexane extracts of Amansia multifida against enteric Gram-negative strains such as Enterobacter aerogenes, Klebsiella pneumoniae, Pseudomonas aeruginosa, Salmonella typhi, S. cholerae-suis, Serratia marcescens, Vibrio cholerae and the Gram-positive bacteria Bacillus subtilis and Staphylococcus aureus. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antibacterial activity; Algae; Lipid-soluble extracts. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000400006 |
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| Rivero,F.; Fallarero,A.; Castañeda,O.; Dajas,F.; Manta,E.; Areces,F.; Mancini Filho,J.; Vidal,A.. |
| The aim of the present paper was to provide the evidences for the antioxidant activity in Halimeda incrassata (Ellis) Lamouroux aqueous extracts obtained after simple water extraction of the fresh algae at room temperature (23°C). Previously in the literature, only antioxidant activity associated to carotenoids fractions of seaweeds has been reported. From different species of seaweeds, Halimeda incrassata aqueous extract exhibited the highest antioxidant activity on the inhibition of TBARS formed during the spontaneous lipid peroxidation of rat brain homogenates with an IC50 of 0.340mg.mL-1. Halimeda incrassata aqueous extract (0.5mg.mL-1), was also capable of decreasing the in vitro generation of hydrogen peroxide by two distinct metabolic pathways... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidant activity; Halimeda incrassata; Algae; Functional food. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612003000200026 |
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| Morales,Eduardo A; Fernández,Erika; Fernandez,Carla E; Lizarro,Dennis; Alcoreza,Pamela. |
| A compilation of phycological literature published on Bolivian algae is presented together with an analysis of strengths, weaknesses, and needs in this field of investigation. An analysis of the nationality of authors, type, content, and geographic focus of the references shows that literature is largely produced by foreign scientist, concentrated on just a few areas of the country, or are biased toward particular algal groups, leaving ample room for more exploration. The Altiplano (high mountain plateau) and Amazon concentrate most of the publications, the phytoplankton and algae found in sediment cores, being the communities that have received more attention from scientists. Taxonomic references focus more on phytoplankton and tychoplankton communities... |
| Tipo: Journal article |
Palavras-chave: Bolivia; Phycology; Algae; Freshwater. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432008000100009 |
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| Registros recuperados: 138 | |
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