Consulta: subjectFacets:"Spirulina platensis"
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Data/hora: 11/06/2024 10:11:47

Modulation of unsaturated fatty acids content in algae Spirulina platensis and Chlorella minutissima in response to herbicide SAN 9785
Provedor de dados: 69
Autores: Kachroo,Deepa; Singh Jolly,Shaneen M.; Ramamurthy,Viraraghavan.
The accumulation of polyunsaturated fatty acids by algae Spirulina platensis and Chlorella minutissima was studied. Response of these organisms to the substituted pyridazinone, SAN 9785, an inhibitor of the long chain fatty acid desaturase, indicated that fatty acid synthesis and their desaturation were regulated differently in these organisms. While the pool of palmitic acid, the precursor for the unsaturated C18 fatty acids, was stringently maintained in the green alga C. minutissima, in the cyanobacterium S. platensis the level of palmitic acid was liberally maintained in spite of the enhanced accumulation of unsaturated C18 fatty acids.
Tipo: Journal article
Palavras-chave: Chlorella minutissima; Fatty acid desaturation; Polyunsaturated fatty acids; Spirulina platensis; SAN 9785.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000400006

Углеродный баланс в культуре цианобактерии Spirulina platensis (Nordst.) Geitl. при выращивании на различных источниках углерода
Provedor de dados: 13
Autores: Бородина, А. В.
Карбонатное равновесие НСО3- + ОН-↔СО32- + Н2О в среде Заррука имеет свои особенности, определяющиеся солевым составом раствора. Переход НСО3-→СО32 (нормальные условия) начинается при рН 8,3-8,4. При повышении рН до 9,8 равновесные концентрации СО32- и НСО3- соотносятся как 1:1. Дальнейшее повышение рН (≥11,3) приводит к полному переводу гидрокарбонат-ионов в карбонат-ионы. И, наоборот, в карбонатной среде с исходным рН11,3 снижение щелочности сопровождается сдвигом равновесия в сторону гидрокарбонатов. Аналогичный переход НСО3-↔СО32 наблюдается и в культуре S. рlatensis. В двух исследованных средах скорость ассимиляции углерода носила различный характер. В гидрокарбонатной среде суточное потребление элемента с течением времени уменьшалось (от 0,15...
Tipo: Journal Contribution
Palavras-chave: Spirulina platensis; Среда Заррука; Карбонатное равновесие; Углеродный  баланс; Carbon balance.
Ano: 2003
URL: http://repository.ibss.org.ua/dspace/handle/99011/548

Использование мочевины при выращивании цианобактерии Spirulina (Arthrospira) platensis методом непропорционально проточной культуры.
Provedor de dados: 13
Autores: Дробецкая, И. В.; Минюк, Г. С.
Исследованы ростовые характеристики, содержание белка и фотосинтетических пигментов Spirulina (Arthrospira) platensis в зависимости от концентраций различных форм азота (N) (мочевины, нитратов, и их смесей) в питательной среде. Спирулину выращивали методом непропорционально проточной культуры в открытых бассейнах объемом 100 л при естественном освещении. В контроле (К) питательной средой служила среда Заррука, в которой содержание нитратного азота (N+5) было увеличено до 500 мг/л (2,6 г/л NaNO3 и 0,52 г/л KNO3). В вариантах эксперимента № 1-6 нитраты были полностью заменены на мочевину (NH2)2 CO в концентрациях 10, 30, 60, 100, 300 и 400 мг N-3/л. В вариантах № 7-12 источником азота служили смеси (NH2)2 CO и нитратов различного состава. Общее содержание...
Tipo: Journal Contribution
Palavras-chave: Spirulina platensis; Азотное питание; Мочевина; Нитраты; Рост; Продуктивность; Белок; Фотосинтетические пигменты.
Ano: 2004
URL: http://repository.ibss.org.ua/dspace/handle/99011/706

Адаптация Spirulina platensis  к изменениям  культуральной среды
Provedor de dados: 13
Autores: Харчук, И. А.; Алисиевич, А. В.
Измерены морфометрические характеристики Spirulina platensis в зависимости от концентрации питательной среды. Показано, что изменение концентрации питательной среды вызывает распад трихомов на гормогонии. Длина молодых гормогониев равна 0–300 мк, доминируют фрагменты до 100 мк (80-90 %). Размеры основного количества гормогониев составляют 20–40 мк. Установлено, что дробление трихом случайно, закономерности в расположении некроидальных клеток («жертвенных») не выявлено. http://biotex.ibss.org.ua/
Tipo: Journal Contribution
Palavras-chave: Трихом; Гормогоний; Некроидные клетки; Адаптация; Spirulina platensis; Trichom; Hormogones; Necrosis cells; Acclimatization.
Ano: 2010
URL: http://repository.ibss.org.ua/dspace/handle/99011/1749

ХРАНЕНИЕ ВОДНО-СПИРТОВОГО ЭКСТРАКТА С-ФИКОЦИАНИНА, ПОЛУЧЕННОГО ИЗ МИКРОВОДОРОСЛИ SPIRULINA PLATENSIS
Provedor de dados: 13
Autores: Береговая, Н. М.; Гудвилович, И. Н.
Рассматриваются различные способы хранения водного раствора С-фикоцианина, пигмента мик- роводоросли Spirulina platensis (Nordst) Geitler, имеющего широкое применение в фармакологии и пищевой промышленности. На основании полученных данных сделан вывод о предпочтительном хранении раствора С-фикоцианина в темноте при температуре 3 – 5 °С при добавлении в качестве консерванта этанола конечной концентрации в растворе 20 %. Проведено ранжирование факторов, вызывающих разложение водного раствора пигмента: влияние света, доступ кислорода, высокая исходная концентрация сухого вещества спирулины, отсутствие консерванта. Выявлена оптимальная концентрация сухого вещества спирулины для экстракции и последующего хранения С-фикоцианина. http://biotex.ibss.org.ua/
Tipo: Journal Contribution
Palavras-chave: Spirulina platensis; С-фикоцианин; Хранение пигмента; С-фікоціанін; Зберігання пігменту; С-phycocyanin; Pigment keeping.
Ano: 2010
URL: http://repository.ibss.org.ua/dspace/handle/99011/1866

Arthrospira (Spirulina) Platensis Can Be Considered as a Probiotic Alternative to Reduce Heat Stress in Laying Japanese Quails
Provedor de dados: 89
Autores: Hajati,H; Zaghari,M; Oliveira,HC.
ABSTRACT This study was conducted to investigate the effects of Arthrospira platensis (Spirulina platensis, SP) on feed intake, feed conversion ratio, egg weight, hen day egg production, intestinal microflora, heat stress biomarkers, and HSP70 gene expression in laying Japanese quails (Coturnix coturnix japonica) suffering heat stress condition. A total of 250 female quails were allocated to 5 treatments, 5 replicates and 10 birds in each replicate in a completely randomized design. Experimental treatments included: 1) basal diet, 2) basal diet+ 0.03 % probiotic, 3) basal diet+ 0.1 % SP, 4) basal diet+ 0.3 % SP, 5) basal diet+ 0.5 % SP. During the last 6 days of the experiment, the quails were exposed to 8h of 34±1°C. The birds had free access to feed and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg production; Heat stress; HSP70 gene; Japanese quails; Spirulina platensis.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000100307

Efecto de Spirulina platensis en la neuropatía axonal inducida por acrilamida en ratones
Provedor de dados: 98
Autores: Sánchez Rodríguez,Nora; Bu Wong,Margarita; Pérez-Saad,Héctor Manuel; León Rodríquez,Niurka; García Salmán,Jorge Daniel.
INTRODUCCIÓN: Spirulina platensis es una microalga verde-azul de alto valor nutricional, la cual ha sido empleada como suplemento dietético. Varios de sus constituyentes ayudan al mantenimiento de la estructura y función de los tejidos nerviosos. OBJETIVO: determinar el efecto de esta microalga en un modelo de neuropatía axonal inducida por acrilamida, en ratones. MÉTODOS: el modelo consistió en la administración diaria de 70 mg/kg de acrilamida, por vía subcutánea, durante 3 semanas consecutivas; con la estimación del efecto neurotóxico de este compuesto mediante el registro, en los músculos de la pierna, del potencial de acción muscular compuesto, durante la estimulación supramáxima del nervio ciático. Después de finalizar las inyecciones de acrilamida,...
Tipo: Journal article
Palavras-chave: Acrilamida; Nervio ciático; Neuropatía axonal; Neuroregeneración; Spirulina platensis; Acrylamide; Sciatic nerve; Axonal neuropathy; Neuroregeneration; Spirulina platensis.
Ano: 2009
URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S1028-47962009000100006

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 Gamma Radiation on Growth and Metabolic Activities of Arthrospira platensis
Provedor de dados: 52
Autores: Abomohra,Abo El-Fatah; El-Shouny,Wagih; Sharaf,Mona; Abo-Eleneen,Mai.
This work aimed to study the influence of gamma radiation on the growth and production of some active substances of Arthrospira platensis. Biomass production was significantly inhibited (p ≤ 0.05) by 21 and 34%, with respect to the control at 2.0 and 2.5 kGy, respectively. Chlorophyll-a content showed 11% reduction at 2.5 kGy compared to the control. As a result of growth and Chl-a inhibition, chlorophyll productivity recorded a continuous significant decrease below the control in the cells exposed to 1, 1.5, 2 and 2.5 kGy by 8, 12, 15 and 25%, respectively after 15 days of incubation. In addition, phycobillins productivity showed significant decrease by 10 and 36% below the control at 2 and 2.5 kGy of gamma radiation, respectively. Protein production...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arthrospira platensis; Spirulina platensis; Gamma radiation; Metabolic activity; Nutritional value.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100409

A method to estimate the biomass of Spirulina platensis cultivated on a solid medium
Provedor de dados: 58
Autores: Pelizer,Lúcia Helena; Moraes,Iracema de Oliveira.
This paper presents a method to estimate the biomass of Spirulina cultivated on solid medium with sugarcane bagasse as a support, in view of the difficulty in determining biomass concentrations in bioprocesses, particularly those conducted in semi-solid or solid media. The genus Spirulina of the family Oscillatoriaceae comprises the group of multicellular filamentous cyanobacteria (blue-green microalgae). Spirulina is used as fish feed in aquaculture, as a food supplement, a source of vitamins, pigments, antioxidants and fatty acids. Therefore, its growth parameters are extremely important in studies of the development and optimization of bioprocesses. For studies of biomass growth, Spirulina platensis was cultured on solid medium using sugarcane bagasse...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spirulina platensis; Solid state cultivation; Estimative of biomass; Sugarcane bagasse; Protein content.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000300024

Aeration effect on Spirulina platensis growth and γ-linolenic acid production
Provedor de dados: 58
Autores: Ronda,Srinivasa Reddy; Bokka,Chandra Sekhar; Ketineni,Chandrika; Rijal,Binod; Allu,Prasada Rao.
The influence of aeration on algal growth and gamma-linolenic acid (GLA) production in a bubble column photobioreactor was investigated. Studies were performed in a 20-L reactor at different aeration rates (0.2-2.5 vvm). Static, continuous, and periodic operation of air resulted in 41.9%, 88.4%, and 108% air saturation of dissolved oxygen, for which the corresponding values of GLA were 2.3, 6.5, and 7.5 mg·g-1 dry cell weight, respectively. An increase in the aeration rate from 0.2 to 2.5 vvm enhanced both the specific growth rate and GLA content under periodic sparging in the bicarbonate medium. With a 6-fold increase in the aeration rate, the GLA content of the alga increased by 69.64% (5.6-9.5 mg· g-1 dry cell weight). In addition, the total fatty acid...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spirulina platensis; Aeration; Photobioreactor; Gamma-linolenic acid.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000100002

Growth and biopigment accumulation of cyanobacterium Spirulina platensis at different light intensities and temperature
Provedor de dados: 58
Autores: Kumar,Manoj; Kulshreshtha,Jyoti; Singh,Gajendra Pal.
In order to find out optimum culture condition for algal growth, the effect of light irradiance and temperature on growth rate, biomass composition and pigment production of Spirulina platensis were studied in axenic batch cultures. Growth kinetics of cultures showed a wide range of temperature tolerance from 20 ºC to 40 ºC. Maximum growth rate, cell production with maximum accumulation of chlorophyll and phycobilliproteins were found at temperature 35 ºC and 2,000 lux light intensity. But with further increase in temperature and light intensity, reduction in growth rate was observed. Carotenoid content was found maximum at 3,500 lux. Improvement in the carotenoid content with increase in light intensity is an adaptive mechanism of cyanobacterium...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spirulina platensis; Growth kinetics; Chlorophyll a; Carotenoid; Phycobiliproteins.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000300034

Growth and content of Spirulina platensis biomass chlorophyll cultivated at different values of light intensity and temperature using different nitrogen sources
Provedor de dados: 58
Autores: Danesi,Eliane Dalva Godoy; Rangel-Yagui,Carlota Oliveira; Sato,Sunao; Carvalho,João Carlos Monteiro de.
The effects of light intensity and temperature in S. platensis cultivation with potassium nitrate or urea as nitrogen source were investigated, as well as the biomass chlorophyll contents of this cyanobacteria, through the Response Surface Methodology. Experiments were performed at temperatures from 25 to 34.5ºC and light intensities from 15 to 69 µmol photons m-2 s-1, in mineral medium. In cultivations with both sources of nitrogen, KNO3 and urea, statistic evaluation through multiple regression, no interactions of such independent variables were detected in the results of the dependent variables maximum cell concentration, chlorophyll biomass contents, cell and chlorophyll productivities, as well as in the nitrogen-cell conversion factor. In cultivation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spirulina platensis; Light intensity; Temperature; Nitrogen sources; Chlorophyll.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000100046

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

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