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Registros recuperados: 23 | |
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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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Carvalho,Lisiane Fernandes de; Moreira,Juliana Botelho; Oliveira,Mariana Souza; Costa,Jorge Alberto Vieira. |
ABSTRACT The food, training, and health are crucial for a good performance in sports. Intense physical activity takes the athlete to maintain a very unstable balance between energy demand and consumption of nutrients. Spirulina microalga has a nutritional profile that renders it an ideal food supplement, because has high protein content, also contains vitamins, minerals, and pigments. In this context, the study aimed to develop, characterize and evaluate the stability of foods enhanced with Spirulina, which are intended for athletes. In this study, six different supplements were developed (electrolyte replenisher, muscle enhancer, and recovery supplement), without and with Spirulina. The electrolyte replenisher with Spirulina compared to the product... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Athletes; Microalgal biomass; Performance; Supplement. |
Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100302 |
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Carvalho,Lisiane Fernandes de; Moreira,Juliana Botelho; Oliveira,Mariana Souza; Costa,Jorge Alberto Vieira. |
ABSTRACT The food, training, and health are crucial for a good performance in sports. Intense physical activity takes the athlete to maintain a very unstable balance between energy demand and consumption of nutrients. Spirulina microalga has a nutritional profile that renders it an ideal food supplement, because has high protein content, also contains vitamins, minerals, and pigments. In this context, the study aimed to develop, characterize and evaluate the stability of foods enhanced with Spirulina, which are intended for athletes. In this study, six different supplements were developed (electrolyte replenisher, muscle enhancer, and recovery supplement), without and with Spirulina. The electrolyte replenisher with Spirulina compared to the product... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Athletes; Microalgal biomass; Performance; Supplement. |
Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132017000100315 |
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Moreira,Lidiane Muniz; Behling,Bruna del Sacramento; Rodrigues,Rosane da Silva; Costa,Jorge Alberto Vieira; Soares,Leonor Almeida de Souza. |
This study was aimed at evaluating the effects of Spirulina (Arthrospira) as a protein source in the nutritional recovery of rats subjected to protein malnutrition. In order to understand such effects, responses of the developing body, serum biochemical profile, and blood count of animals were analyzed. A total of, 23 Wistar Rattus norvegicus were given a proteic diet (AIN-93G adapted) in malnutrition phase (phase I) for 10 days. After this period, the rats were separated into four groups according to the protein source (recovery phase): Control (C), casein 12%; Spirulina level I (S1), Spirulina 8.8% + casein 5.0%; Spirulina level II (S2), Spirulina 17.6% + casein 0.15%, and Spirulina level III (S3), Spirulina 26.4%. Recovery phase (phase II) lasted 30... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Protein malnutrition; Rats; Nutritional recovery; Rattus norvegicus; Spirulina. |
Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000300013 |
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Mazzola,Daiane; Fornari,Fernando; Vigano,Gabriela; Oro,Tatiana; Costa,Jorge Alberto Vieira; Bertolin,Telma Elita. |
ABSTRACT This study aimed to evaluate the effect of Spirulina platensis and moderate exercise on oxidative stress and lipid profiles in the rats. Forty male Wistar rats were allocated to the following 10-week treatments, three times a week: exercise (E, 30 min swimming),S. platensis (SP, 26 mg/Kg); exercise andSpirulina (ES); and control (C). Outcomes were Thiobarbituric Acid Reactive Substances (TBARS) in serum and brain, and cholesterol and triglycerides (TG) in serum. Rats treated with exercise showed lower brain TBARS than the controls, mostly in association withS. platensis. In the groups E and ES, serum TBARS decreased after intervention. Compared with the controls, both E and ES prevented an increase in cholesterol and reduced triglycerides. Results... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Exercise; Antioxidant; Cholesterol; Lipid peroxidation. |
Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000600961 |
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Morais,Etiele Greque de; Cassuriaga,Ana Paula Aguiar; Callejas,Nicolás; Martinez,Natalia; Vieitez,Ignacio; Jachmanián,Iván; Santos,Lucielen Oliveira; Morais,Michele Greque de; Costa,Jorge Alberto Vieira. |
ABSTRACT Spirulina is a microalgal genre that has the capacity to produce various bioproducts with applications in several areas including the energy sector. The study aimed to assess the ability of CO2 biofixation, biodiesel and other biocompounds production by Spirulina sp LEB 18 cultured in air-lift photobioreactor. The microalgae presented a rich macronutrient composition: protein (47.3%), carbohydrates (13.4%) and a high lipid content (32.7%) in a media with nitrogen reduction, CO2 using air-lift photobiorector. Furthermore, 160 mg.L.d-1 of CO2 was biofixed, generating a maximum biomass yield of 0.02 g.L.d-1. The lipids evaluated for biodiesel production presented a theoretical yield of 19.8% for in situ transesterification and 47.9% for conventional... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biofuels; Carbon dioxide; Microalgae; Photobiorefinary; Biocompounds. |
Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100703 |
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Colla,Luciane Maria; Primaz,Andreiza Lazzarotto; Benedetti,Silvia; Loss,Raquel Aparecida; Lima,Marieli de; Reinehr,Christian Oliveira; Bertolin,Telma Elita; Costa,Jorge Alberto Vieira. |
Abstract A Plackett–Burman Factorial Design of 16 experiments was conducted to assess the influence of nine factors on the production of lipases by filamentous fungi. The factors investigated were bran type (used as the main carbon source), nitrogen source, nitrogen source concentration, inducer, inducer concentration, fungal strain (Aspergillus niger or Aspergillus flavus were selected as good lipase producers via submerged fermentation), pH and agitation. The concentration of the yeast extract and soybean oil and the pH had a significant effect (p < 0.05) on lipase production and were consecutively studied through a Full Factorial Design 23, with the concentration of yeast extract and pH being significant (p < 0.05). These variables were optimized... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural residues; Lipase; Optimization; Submerged bioprocess. |
Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000200461 |
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Linde,Giani Andrea; Magagnin,Glênio; Costa,Jorge Alberto Vieira; Bertolin,Telma Elita; Colauto,Nelson Barros. |
This study aimed to determine the influence of process variables and production, of polygalacturonase (PG) and polymetylgalacturonase (PMG) by solid substrate cultivation using a fixed bed column bioreactor. A fractional factorial design (FFD) was used to study the effect of the following variables: microorganism (Aspergillus oryzae and Aspergillus niger), substratum (wheat bran and defatted rice bran), aeration (40 and 60 ml h-1g-1), pectin (5 and 10 g g-1) and nitrogen (urea and ammonium sulfate). Microorganism, aeration and initial pectin were identified in FFD as significant variables (p<0.05) on PG production. A central composed design to optimize PG and PMG productions indicated that Aspergillus niger presents higher PG production; substratum and... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Solid state fermentation; Agro-industrial residues; Pectinase. |
Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000300033 |
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Muliterno,Adriana; Mosele,Patrícia Correa; Costa,Jorge Alberto Vieira; Hemkemeier,Marcelo; Bertolin,Telma Elita; Colla,Luciane Maria. |
A Spirulina platensis tem sido estudada devido a seu alto valor protéico, digestibilidade e por apresentar quantidades significativas de ácidos graxos poliinsaturados, vitaminas, fenólicos e ficocianina, podendo ser utilizada na alimentação humana. A utilização de nutrientes de baixo custo é um fator importante na produção da cianobactéria por possibilitar a redução de custos de processo. Objetivou-se com este trabalho estudar o cultivo mixotrófico da S. platensis por meio da adição de uma fonte orgânica de carbono (glicose) em modo bateladaalimentada. Foi utilizado um Planejamento Fatorial Completo 2³ para o cultivo e as variáveis de estudo foram a concentração de glicose (0,5 gL-1 e 1,0 gL-1), a diluição do meio Zarrouk (50% e 75%) e a iluminância (1800... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomassa; Glicose; Iluminância; Mixotrófico; Spirulina platensis. |
Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542005000600005 |
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Colla,Luciane Maria; Primaz,Andreiza Lazzarotto; Lima,Marieli de; Bertolin,Telma Elita; Costa,Jorge Alberto Vieira. |
A biorremediação é uma tecnologia que utiliza o metabolismo de microrganismos para eliminação ou redução, a níveis aceitáveis, de poluentes presentes no ambiente. Os herbicidas triazínicos são usados intensivamente no controle de ervas daninhas, principalmente na cultura de milho. Objetivou-se, neste trabalho, isolar fungos filamentosos de solos contaminados com herbicidas triazínicos (atrazine e simazine) e selecionar os microrganismos isolados quanto à capacidade de crescimento em meio adicionado de atrazine. Os microrganismos foram isolados, cultivados em meio Ágar-Batata-Dextrose (BDA) acidificado com ácido tartárico 10%, adicionado de 50 mg.Kg-1 de atrazine e incubados por 5 dias a 25ºC. Foi realizada a medida diária do crescimento fúngico e calculada... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atrazine; Simazine; Isolamento; Fungos filamentosos. |
Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542008000300016 |
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Bertolin,Tanise Boeira Pelegrini; Costa,Jorge Alberto Vieira; Bertolin,Telma Elita; Colla,Luciane Maria; Hemkemeier,Marcelo. |
Estudou-se o cultivo da cianobactéria Spirulina platensis utilizando-se efluente sintético de suíno a fim de avaliar o crescimento das cepas LEB 52 e PARACAS dessa cianobactéria, em função da diluição do meio (0 e 50%) e da concentração de bicarbonato de sódio (0 e 3g/L). Nesta etapa foi utilizado um Planejamento Fatorial Completo 2³. Na Segunda etapa, diluiu-se o meio em 80, 50 e 20% e utilizou-se um Planejamento Fatorial Multiníveis 3¹ x 2¹. Os cultivos foram realizados a 30°C, com fotoperíodo de 12 horas. As variáveis utilizadas como resposta nas duas etapas foram a concentração máxima de biomassa e a velocidade específica máxima de crescimento, sendo os resultados avaliados mediante de Análise de Variância. Na primeira etapa, os maiores valores de... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Spirulina platensis; Cianobactéria; Efluente suíno. |
Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542005000100015 |
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Registros recuperados: 23 | |
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