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| Registros recuperados: 123 | |
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| Ramos,Geraldo José Peixoto; Santana,Lucineide Maria; Medina,Anderson Matos; Bicudo,Carlos Eduardo de Mattos; Branco,Luis Henrique Zanini; Moura,Carlos Wallace do Nascimento. |
| ABSTRACT Knowledge of algal and cyanobacterial diversity of phytotelmata remains poorly-known, especially for bromeliads from different vegetation formations. We investigated the microalgae communities of four species of tank bromeliads from different vegetation formations in Bahia State, Northeast Brazil, highlighting the composition, richness and diversity of taxa. Sampling of water stored in bromeliads was carried out quarterly between 2014 and 2016, and abiotic variables and morphometric attributes of bromeliads were measured. A total of 89 taxa of algae and cyanobacteria were recorded for the four bromeliad species studied. The microalgae communities of the phytotelmata varied among vegetation formations, with one tank bromeliad, Alcantarea nahoumii,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diversity; Ecology; Microalgae; Microhabitat; Phytotelm; Richness; Tank bromeliads. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000400567 |
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| Bartozek,Elaine Cristina Rodrigues; Bueno,Norma Catarina; Ludwig,Thelma Alvim Veiga; Tremarin,Priscila Izabel; Nardelli,Margaret Seghetto; Rocha,Angélica Cristina Righetti da. |
| This study represents a taxonomic survey of class Bacillariophyceae diatoms found in samples collected in the Iguaçu River (Iguaçu National Park, municipality of Foz do Iguaçu, in the state of Paraná, Brazil) between August 2007 and July 2008. Two sampling stations were utilized, the first located upstream of Iguaçu Falls (Cais Bananeiras Station) and second downstream of the falls (Cais Macuco Safari Station). The study resulted in the identification of 86 taxa, including 74 at the specific level and seven taxonomic varieties. Two of these had never before been documented in the state of Paraná: Gomphonema gibberum Hustedt and Pinnularia meridiana Metzeltin & Krammer. Nine are first-time records for Brazil: Cymbella charrua Metzeltin,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Taxonomy; Microalgae; Lotic system; State of Paraná. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000100012 |
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| Côrtes, Guilherme de Freitas; Universidade Federal de Santa Catarina; Tsuzuki, Monica Yumi; Universidade Federal de Santa Catarina; Costa Melo, Emílio Mateus. |
| Ciliate protozoa of the genus Euplotes commonly appears contaminating mass cultures of rotifers but also with potential to be used as live food in the larviculture of marine fish. To obtain a monoculture of Euplotes sp., three diets were tested: 1) microalgae Nannochloropsis oculata, 2) commercial diet for rotifers Culture Selco 3000, and 3) baker’s yeast (Saccharomyces cerevisiae). The ciliates were inoculated at 10 ind. mL-¹. On day 5, protozoa densities in the groups fed the commercial diet (1,911.0 ± 248.7 ind. mL-¹) and the baker’s yeast (2,600.0 ± 195.3 ind. mL-1) did not differ, but were higher than the group fed microalgae (2.0 ± 1.4 ind. mL-1) (p < 0.05). On day 6, the density in the group fed baker’s yeast was higher (15,484.0 ± 1,164.9... |
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Palavras-chave: 2.03.00.00-0 live food; Production; Microalgae; Rotifers; Larviculture; Marine fish Aquicultura. |
| Ano: 2012 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/11795 |
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| Teixeira,Priscila F.; Kaminski,Sonia M.; Avila,Tatiana R.; Cardozo,Alessandro P.; Bersano,José G.F.; Bianchini,Adalto. |
| Egg production in the copepod Acartia tonsa was evaluated using different densities of the microalgae Thalassiosira weissflogii, Chaetoceros muelleri and Isochrysis galbana. Male and female were kept under controlled conditions (salinity 30, 20°C, photoperiod 12L:12D), acclimated to the experimental conditions and left over a period of 24 h to allow copulation. Algal densities tested were equivalent in biovolume and corresponded to 0, 2.5, 5, 10, 20, 40 and 60.10³ cells.mL-1 of T weissflogii. Ten acclimated female were separated, transferred to glass bottles and exposed for further 24 h to the corresponding experimental medium. After this period, the eggs were fixed and counted. Copepod egg production reached a threshold value when T weissflogii, C.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Egg production; Acartia tonsa; Microalgae. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000200009 |
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| CHIA,MATHIAS A.; LOMBARDI,ANA T.; MELãO,MARIA DA GRAÇA G.. |
| The need for clean and low-cost algae production demands for investigations on algal physiological response under different growth conditions. In this research, we investigated the growth, biomass production and biochemical composition of Chlorella vulgaris using semi-continuous cultures employing three growth media (LC Oligo, Chu 10 and WC media). The highest cell density was obtained in LC Oligo, while the lowest in Chu medium. Chlorophyll a, carbohydrate and protein concentrations and yield were highest in Chu and LC Oligo media. Lipid class analysis showed that hydrocarbons (HC), sterol esthers (SE), free fatty acids (FFA), aliphatic alcohols (ALC), acetone mobile polar lipids (AMPL) and phospholipids (PL) concentrations and yields were highest in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carbohydrates; Lipid class; Microalgae; Proteins. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000401427 |
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| MATOS,JISLENE B.; OLIVEIRA,SUELLEN M.O. DE; PEREIRA,LUCI C.C.; COSTA,RAUQUÍRIO M. DA. |
| ABSTRACT The present study aimed to analyze the structure and the temporal variation of the phytoplankton of Ajuruteua beach (Bragança, Pará) and to investigate the influence of environmental variables on the dynamics of this community to provide a basis about the trophic state of this environment. Biological, hydrological and hydrodynamic samplings were performed during a nyctemeral cycle in the months of November/08, March/09, June/09 and September/09. We identified 110 taxa, which were distributed among the diatoms (87.3%), dinoflagellates (11.8%) and cyanobacteria (0.9%), with the predominance of neritic species, followed by the tychoplankton species. Chlorophyll-a concentrations were the highest during the rainy period (24.5 mg m-3), whereas total... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon beaches; Biomass; Microalgae; Seasonal variation. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000401325 |
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| Pereira,Carlos; De Roa,Evelyn Zoppi; Montiel,Edie; Hernández,Vanessa; Castillo,Anyoelis. |
| ABSTRACT Microphytobenthos is a community that groups benthic photosynthetic microorganisms. In Venezuela and the other countries in the Caribbean Sea, this group has been scarcely studied, so its diversity is unknown. This study aims to describe the spatial and temporal variations of its composition and abundance in the central coastal zone of Venezuela. Samplings were conducted monthly from June 2014 to March 2015, in random stations at depths less than 20 m. Richness and abundance data were processed through multivariate hypothesis tests (Anosim - SIMPER - nMDS). A total of 327 species were identified, with a dominance of diatoms and dinoflagellates, without significant spatial and temporal variations. In terms of abundance, the most representative... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Community structure; Marine ecology; Caribbean Sea; Microalgae. |
| Ano: 2022 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612022000200029 |
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| Coêlho,Diego de Freitas; Tundisi,Louise Lacalendola; Cerqueira,Keilla Santos; Rodrigues,Jacqueline Rego da Silva; Mazzola,Priscila Gava; Tambourgi,Elias Basile; Souza,Roberto Rodrigues de. |
| Abstract Microalgae are aquatic unicellular microorganisms that can be found both in freshwater and marine systems; are capable of photosynthesis; and can grow as individual cells or associated in chains or small colonies. Microalgae cultivation has gained large momentum among researchers in the past decades due to their ability to produce value metabolites, remarkable photosynthetic efficiency, and versatile nature. The wide technological potential, and thus increasing amount of scattered knowledge, may become the very first barrier that a post graduating student, or any non-specialist reader, will face when introduced to the subject. In this review paper, we access the core aspects of microalgae technology, covering their main characteristics, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Microalgae; Microalgae Selection and Isolation; Green Products; Microalgae Cultivation; Bioactive Compounds. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000101000 |
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| Cassini,Servio Tulio; Francisco,Sara Aparecida; Antunes,Paulo Wagner Pereira; Oss,Rodrigo Nunes; Keller,Regina. |
| ABSTRACT Harvesting is a critical step in microalgal biomass production process for many reasons. Among the existing techniques available for harvesting and dewatering microalgal biomass, recovery from aqueous medium by coagulation-flocculation has been the most economically viable process, althoughit is highly dependent on pH. This study aims to assess alternative coagulants compared to the standard coagulant aluminum sulfate for microalgal biomass recovery from anaerobic effluent of domestic sewage treatment. The effluent quality was also analyzed after biomass recovery. Coagulants represented by modified tannin, cationic starch and aluminum sulfate recovered more than 90% of algae biomass, at concentrations greater than 80 mg/L, in the pH range 7-10.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Microalgae; Anaerobic effluent; Coagulation-flocculation; PH. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132017000100700 |
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| Moraes,Luiza; Rosa,Gabriel Martins da; Souza,Michele da Rosa Andrade Zimmermann de; Costa,Jorge Alberto Vieira. |
| ABSTRACT Microalgae are efficient at using solar energy to turn CO2 and nutrients into biomass containing lipids, proteins, carbohydrates and other compounds that may be used to produce bioproducts for human and animal consumption and pharmaceutical use. The aim of this study was to assess the effect of the NaNO3 and NaCl concentration on the growth kinetics, the biomass composition and the ability to biofix CO2 using the microalga Spirulina sp. LEB 18. The assays were carried out according to a 22 central composite design (CCD) with different concentrations of NaNO3 (1.25, 1.88 and 2.50 g L-1) and NaCl (1.00, 15.0 and 30.0 g L-1). The assays were carried out in 2 L vertical tubular photobioreactors at 30°C, 12 h light/dark and an injection of 12.0% v/v of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: CO2; Fixation; Growth kinetics; Microalgae; Nutrients. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100410 |
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| Registros recuperados: 123 | |
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