Consulta: creatorFacets:"Costa,Jorge Alberto Vieira"
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Data/hora: 04/06/2024 06:48:32

Spirulina platensis effects on the levels of total cholesterol, HDL and triacylglycerols in rabbits fed with a hypercholesterolemic diet
Provedor de dados: 52
Autores: Colla,Luciane Maria; Muccillo-Baisch,Ana Luiza; Costa,Jorge Alberto Vieira.
In this work, hypercholesterolemia was induced in rabbits by feeding them a high cholesterol diet (CD, 350 mg/d) and the effects of supplementing this diet with 0.5 g/d Spirulina platensis was evaluated by measuring the levels of serum total-cholesterol (TC), triacylglycerols (TAG) and high-density lipoprotein (HDL-cholesterol) at the start of the experiment and after 30 d and 60 d. It was found that the levels of serum cholesterol decreased from 1,054±101 mg.dL-1 in the rabbits fed a CD without S. platensis to 516±163 mg.dL-1 to those fed with a high cholesterol diet supplemented with S. platensis (significant at p &lt;0.0001). The addition of Spirulina to the cholesterolemic diet did not cause significative decrease on the levels of triacylglycerols in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spirulina platensis; Cholesterol; Rabbits.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000200022

Effect of microalga Spirulina platensis (Arthrospira platensis) on hippocampus lipoperoxidation and lipid profile in rats with induced hypercholesterolemia
Provedor de dados: 52
Autores: Bertolin,Telma Elita; Pilatti,Dayane; Giacomini,Ana Cristina Vendrametto Varrone; Bavaresco,Caren Serra; Colla,Luciane Maria; Costa,Jorge Alberto Vieira.
Studies have been conducted on microalga Spirulina platensis (Arthrospira platensis) due to its therapeutic potential in several areas, including the capacity for preventing and decreasing the damages caused by hyperlipidemia and the antioxidant activity. The aim of the study was to evaluate the effect of microalga Spirulina platensis on hippocampus lipoperoxidation and lipid profile in rats with induced hypercholesterolemia during 60 days. The measurement of hippocampus lipoperoxidation did not demonstrate significant difference (p&gt;0.05) when Spirulina platensis was added to hypercholesterolemic diet. The evaluation of lipid profile showed that the administration of the microalga in therapeutic and preventive ways led to a significant protective effect...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spirulina; Arthrorspira; Lipids; Cholesterol; Antioxidant.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000500024

Pentoses Used in Cultures of Synechococcus nidulans and Spirulina paracas: Evaluation of Effects in Growth and in Content of Proteins and Carbohydrates
Provedor de dados: 52
Autores: Freitas,Bárbara Catarina Bastos de; Cassuriaga,Ana Paula Aguiar; Morais,Michele Greque de; Atala,Daniel Ibraim Pires; Costa,Jorge Alberto Vieira.
Abstract The biological assimilation of the sugars present in lignocellulosic residues has gained prominence since these residues are the most abundant and economic residues in nature. Thus, the objective of this work was to determine whether the use of D-xylose and L-arabinose as sources of carbon in Synechococcus nidulans and Spirulina paracas cultures affects the growth and production of proteins and carbohydrates. Kinetic growth parameters, pentose consumption, protein content and carbohydrates were evaluated. Synechococcus nidulans and Spirulina paracas consumed all concentrations of pentose used. The highest cellular concentration (1.37 g.L-1) and the highest protein productivity (54 mg.L-1.d-1) were obtained for Spirulina paracas, which was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arabinose; Proteins; Spirulina; Synechococcus; Xylose.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100513

Purification of C-phycocyanin from Spirulina platensis in aqueous two-phase systems using an experimental design
Provedor de dados: 52
Autores: Antelo,Francine Silva; Costa,Jorge Alberto Vieira; Kalil,Susana Juliano.
C-phycocyanin from Spirulina platensis was purified in aqueous two-phase systems (ATPS) of polyethylene glycol (PEG)/potassium phosphate, varying the molar mass of the PEG. Results using a full factorial design showed that an increase in the concentration of salt and decrease in the concentration of PEG caused an increment in the purification factor for all the ATPS studied. Optimization of the conditions of the purification was studied using a central composite rotatable design for each molar mass of PEG. The ATPS composed of 7% (w/w) PEG 1500 or 4% (w/w) PEG 8000 (g/gmol) and 23 or 22.5% (w/w) of phosphate resulted a purification factor of 1.6-fold for C-phycocyanin, with total and 57% recovery, respectively. Process conditions were optimized for the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: C-phycocyanin; Purification Factor; Protein; Polyethylene glycol.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000100001

Carbon Dioxide Biofixation and Production of Spirulina sp. LEB 18 Biomass with Different Concentrations of NaNO3 and NaCl
Provedor de dados: 52
Autores: 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

Novel Food Supplements Formulated With S pirulina To Meet Athletes’ Needs
Provedor de dados: 52
Autores: 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

Simultaneous amyloglucosidase and exo-polygalacturonase production by Aspergillus niger using solid-state fermentation
Provedor de dados: 52
Autores: Costa,Jorge Alberto Vieira; Colla,Eliane; Magagnin,Glênio; Santos,Lucielen Oliveria dos; Vendruscolo,Mauricio; Bertolin,Telma Elita.
Amyloglucosidase (AMG) and exo-polygalacturonase (exo-PG) were simultaneously produced by two different strains of Aspergillus niger in solid-state fermentation (SSF) using defatted rice-bran as substrate. The effect of Aspergillus niger strain (t0005/007-2 and/or CCT 3312), inoculum type (spore suspension or fermented bran) and addition of inducers (pectin and/or starch) to the culture media was studied using a 3² x 2¹ factorial experimental design. The production of AMG and exo-PG was significantly affected by fungal strain and inoculum type but inducers had no effect. The maximum yields obtained were 1310 U/g dm for AMG using a spore suspension of A. niger CCT 3312 and 50.2 U/g dm for exo-PG production, using A. niger t0005/007-2 and fermented bran as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amyloglucosidase; Exo-polygalacturonase; Rice-bran; Solid-state fermentation.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000500003

Antioxidant properties of Spirulina (Arthospira) platensis cultivated under different temperatures and nitrogen regimes
Provedor de dados: 52
Autores: Colla,Luciane Maria; Furlong,Eliana Badiale; Costa,Jorge Alberto Vieira.
The main aim of this work was to investigate the effects of temperature and nitrogen concentration on the antioxidant potential of extracts from Spirulina (Arthospira) platensis biomass. S. platensis biomass obtained at 35ºC and with 1.875 g.L-1 or 2.5 g.L-1 of sodium nitrate in the culture medium presented higher concentrations of phenolic compounds. The antioxidant potential of methanol extracts of biomass on the enzymatic browning caused by peroxidase were 29 and 35%, respectively, being the reduction related to the amount of phenolic compounds present in this extract.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant; Phenolic compounds; Spirulina (Arthospira) platensis.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000100020

Antioxidant effect of phycocyanin on oxidative stress induced with monosodium glutamate in rats
Provedor de dados: 52
Autores: Bertolin,Telma Elita; Farias,Daniele; Guarienti,Cíntia; Petry,Fernanda Tais Souza; Colla,Luciane Maria; Costa,Jorge Alberto Vieira.
The objective of this work was to study the antioxidant effect of phycocyanin on the oxidative stress induced by monosodium glutamate in the rats. The tests were performed with 32 rats of Wistar breed, divided into four groups, which were administered saline solution of phycocyanin, monosodium glutamate and monosodium glutamate plus phycocyanin. Sulfhydryl groups and the secondary substances derived from lipid oxidation were determined through the level of TBA. The evaluation of these values and the level of sulfhydryl showed that the administration of phycocyanin presented significant antioxidant effect (p &lt; 0.05) reducing the oxidative stress induced by the monosodium glutamate in vivo.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant; Oxidative stress; Phycocyanin.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000400012

Hydrolysis of insoluble fish protein residue from whitemouth croaker (Micropogonias furnieri) by fungi
Provedor de dados: 52
Autores: Martins,Vilásia Guimarães; Palezi,Simone Canabarro; Costa,Jorge Alberto Vieira; Prentice,Carlos.
A significant amount of insoluble fibrous protein, in the form of feather, hair, scales, skin and others are available as co-products of agro industrial processing. These wastes are rich in keratin and collagen. This study evaluated different fungi for the hydrolysis of insoluble fish protein residues. Proteins resulting from Micropogonias furnieri wastes through pH-shifting process were dried and milled for fermentation for 96 h. This resulted the production of keratinolytic enzymes in the medium. Trichoderma sp. on alkaline substrate (28.99 U mL-1) and Penicillium sp. on acidic substrate (31.20 U mL-1) showed the highest proteolytic activities. Penicillium sp. showed the largest free amino acid solubilization (0.146 mg mL-1) and Fusarium sp. the highest...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish waste; Fungi; Fibrous proteins; Hydrolysis; Whitemouth croaker.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000100014

Novel Food Supplements Formulated With Spirulina To Meet Athletes’ Needs
Provedor de dados: 52
Autores: 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

Spirulina as a protein source in the nutritional recovery of Wistar rats
Provedor de dados: 52
Autores: 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

Spirulina platensis Enhances the Beneficial Effect of Exercise on Oxidative Stress and the Lipid Profile in Rats
Provedor de dados: 52
Autores: 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

Evaluation of CO2 Biofixation and Biodiesel Production by Spirulina (Arthospira) Cultivated In Air-Lift Photobioreactor
Provedor de dados: 52
Autores: 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

Use of Solid Waste from Thermoelectric Plants for the Cultivation of Microalgae
Provedor de dados: 52
Autores: Vaz,Bruna da Silva; Costa,Jorge Alberto Vieira; Morais,Michele Greque.
ABSTRACT The aim of this study was to analyze the influence of solid waste on the cultivation of the microalgae Spirulina sp. LEB 18 and Chlorella fusca LEB 111 with 0, 40, 80 and 120 ppm of mineral coal ash. The addition of the ash did not inhibit the cultivation of microalgae at the tested concentrations, showing that it could be used for the cultivation of these microalgae due to the minerals present in the ash, which might substitute the nutrients needed for their growth.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ashes; Chlorella fusca LEB 111; Microalgae; Mineral coal; Spirulina sp. LEB 18.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100200

Surface response methodology for the optimization of lipase production under submerged fermentation by filamentous fungi
Provedor de dados: 58
Autores: 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 &lt; 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 &lt; 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

Column bioreactor use for optimization of pectinase production in solid substrate cultivation
Provedor de dados: 58
Autores: 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&lt;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

Cultivo mixotrófico da microalga Spirulina platensis em batelada alimentada
Provedor de dados: 64
Autores: 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

Isolamento e seleção de fungos para biorremediação a partir de solo contaminado com herbicidas triazínicos
Provedor de dados: 64
Autores: 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

Cultivo da cianobactéria Spirulina platensis a partir de efluente sintético de suíno
Provedor de dados: 64
Autores: 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

Potencial amilolítico do grão de milho maltado no processo de sacarificação do mesmo cereal
Provedor de dados: 64
Autores: Farias,Daniele; Margarites,Ana Cládia; Reinehr,Christian Oliveira; Colla,Luciane Maria; Costa,Jorge Alberto Vieira; Bertolin,Telma Elita.
Objetivou-se avaliar o potencial de sacarificação do malte de milho para produção de álcool deste cereal. Para tal, foi realizada germinação do grão de milho a 20 ºC por 5 dias. O potencial amilolítico do malte de milho foi otimizado por meio de um Planejamento Fatorial Completo 2² com 3 pontos centrais, sendo as variáveis de estudo a temperatura de incubação e concentração de substrato [S]. A sacarificação foi realizada por meio de um Planejamento de Mistura com três pontos centrais, sendo as variáveis de estudo a concentração de malte e concentração de substrato, durante 6 horas. A fermentação foi conduzida com a melhor condição de sacarificação, em reator de 5 L e volume útil de 2 L. O pH foi fixado em 4,5-5. O Brix foi acertado para o valor de 14º. O...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amido; Enzimas amilolíticas; Fermentação alcoólica e sacarificação.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542009000300027

Perfil de ácidos graxos de microalgas cultivadas com dióxido de carbono
Provedor de dados: 64
Autores: Morais,Michele Greque de; Costa,Jorge Alberto Vieira.
As microalgas são consideradas fontes potenciais de diversos compostos químicos. Os ácidos graxos obtidos da biomassa podem apresentar efeitos terapêuticos em humanos e podem ser usados para produção de biodiesel. Objetivou-se, neste trabalho verificar o conteúdo lipídico e o perfil dos ácidos graxos das microalgas Spirulina sp., Scenedesmus obliquus, Chlorella kessleri e Chlorella vulgaris cultivadas em diferentes concentrações de dióxido de carbono e bicarbonato de sódio. A microalga Chlorella kessleri cultivada com 12% de CO2 apresentou a maior concentração de lipídios na biomassa seca (9,7% p/p). A máxima concentração de ácidos graxos insaturados foi 72,0% (p/p) para C. vulgaris cultivada com 12% de CO2. Para os ácidos graxos saturados o maior valor...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ácidos graxos; Chlorella; Lipídios; Scenedesmus; Spirulina.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542008000400032

Cultivo da microalga spirulina platensis em fontes alternativas de nutrientes
Provedor de dados: 64
Autores: Andrade,Michele da Rosa; Costa,Jorge Alberto Vieira.
O Brasil gera cerca de 18 milhões de toneladas de melaço por ano, com aproximadamente 50% de açúcares e carece de maior quantidade de alimentos que auxiliem no combate à desnutrição. Spirulina platensis é uma microalga que pode conter 74% de proteínas e, embora seja um microrganismo autotrófico, a complementação do meio de cultivo com carbono orgânico pode estimular seu crescimento. S. platensis foi cultivada em modo autotrófico com bicarbonato de sódio, e mixotrófico com 0,25; 0,50; 0,75 e 1,00 g.L-1 de melaço em pó (MEP) ou melaço líquido (MEL). A presença de MEL ou MEP resultou em crescimento por, no mínimo 35 dias, e melhores parâmetros de crescimento que os cultivos autotróficos que cresceram durante 30 dias. Utilizando ME P 0,25 g.L-1 a maior...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cianobactéria; Cultivo mixotrófico; Melaço.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542008000500029