The Microalgal Cell

Andersen, Robert A.

doi:10.1002/9781118567166.ch1

Cited by 35 publications

(25 citation statements)

References 79 publications

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“…Nitrogen and phosphate are two of the macronutrients that are crucial for cell growth and metabolism. Nitrogen is a critical element in the formation of proteins, lipids, and nucleic acids (Guschina and Harwood, 2013), while phosphate is essential for the synthesis of ATP, phospholipids, and the backbone of DNA and RNA (Andersen, 2013). In our studies, both S. obliquus and C. vulgaris showed a complete consumption of nitrogen and a partial consumption of phosphorus in Bold and Bristol culture media (particularly faster consumption by S. obliquus), which favored a rapid accumulation of lipids (Esakkimuthu et al, 2016;Kiran et al, 2016;Lari et al, 2016).…”

Section: Discussionmentioning

confidence: 49%

Towards the production of microalgae biofuels: the effect of the culture medium on lipid deposition

García¹,

Rangel-Basto²,

Barajas-Solano³

et al. 2019

bta

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Microalgae have been studied in recent years for various reasons, one among them being their potential in the production of biofuels. Biofuels are considered as a renewable source that does not compete with the food industry, and their production results in a reduced environmental footprint. The objective of the present study was to evaluate the different culture conditions that influence the productivity of the microalgae Chlorella vulgaris and Scenedesmus obliquus as a potential source for the production of biodiesel. Bold, Bristol, and modified Algal Assay Procedure (AAP) culture media were evaluated to determine which of them can provide the best conditions that favor biomass production and lipid deposition. The results indicated that S. obliquus cultivated in Bold medium exhibited a higher production of biomass after 30 days (1.730 g/l), while C. vulgaris showed a higher production in the modified AAP medium (1.880 g/l). Although the cultures grown in the AAP medium showed a more significant percentage of biomass comprising lipids than those in the other two media, between the two microalgae, the highest final lipid production was obtained by growing S. obliquus in Bold medium (0.685 g/l, 39.60% of biomass). N, P, Fe, and Mo were the elements added to the growth media, and depending on their concentration in the media, there were differences in the production of lipids. Thus, it can be concluded that S. obliquus cultivated in Bold medium has the highest potential in the production of lipids for biodiesel, but it is necessary to further optimize the cultivation of biomass to obtain a greater quantity of lipids, while interfering as little as possible in its synthesis capacity.

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Section: Discussionmentioning

confidence: 49%

Towards the production of microalgae biofuels: the effect of the culture medium on lipid deposition

García¹,

Rangel-Basto²,

Barajas-Solano³

et al. 2019

bta

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“…37 In Chlorophyta such as Chlorella, carbohydrates can be present as structural components of the cell wall (cellulose and hemicellulose) and reserve compounds (starch). 38 Carbohydrates in the form of starch, cellulose, hemicellulose can be converted into monosaccharides by chemical or enzymatic processes, and can thus be used for the production of bioethanol by the fermentation process. 39 process by increasing biomass production, leading to high carbohydrate contents (28.2% wt/wt on average) and high theoretical ethanol production (12.8 ml 100 g −1 of biomass).…”

Section: Resultsmentioning

confidence: 99%

Bioprocess strategies for enhancing biomolecules productivity in Chlorella fusca LEB 111 using CO₂ a carbon source

Moraes

Santos

Costa

2019

Biotechnology Progress

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The aim of this study was to evaluate the influence of different carbon dioxide (CO2) concentrations on the distribution of carbon forms in the culture medium and the biomass production and biomolecules productivity of the strain Chlorella fusca LEB 111. In this study, experiments were carried out in which C. fusca cultures were exposed to different CO2 concentrations, 0.03% (0.08 mlCO2 mlmedium−1 days−1), 5% (0.18 mlCO2 mlmedium−1 days−1), and 15% vol/vol CO2 (0.54 mlCO2 mlmedium−1 days−1). Among the carbon chemical species distributions in the culture medium, bicarbonate was predominant (94.2–98.9%), with the highest quantitative percentage in the experiment receiving a 15% CO2 injection. C. fusca LEB 111 cultivated with 15% CO2 showed the highest biomass productivity (194.3 mg L−1 days−1) and CO2 fixation rate (390.9 mg L−1 days−1). The carbohydrate productivity in the culture that received 15% CO2 was 46.2% higher than the value verified for the culture with the addition of CO2 from the air (0.03% CO2). In addition, CO2 concentration providing increases of 0.03–15% to C. fusca cultures resulted in a 31.6% increase in the lipid productivity. These results showed that C. fusca can be used for CO2 bioconversion and for producing biomass with potential applications for biofuels and bioproducts.

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“…Se trata de organismos microscópicos, ancestrales, de origen polifilético, es decir que no pertenecen a un solo ancestro común; su tamaño varía entre 20 a 200 µm, son unicelulares y eucariotas, con excepción de las cianobacterias que son procariotas. Su alimentación es esencialmente fotoautótrofa, es decir que son capaces de utilizar el carbono inorgánico en forma de dióxido de carbono y la energía de la luz del sol para generar moléculas complejas que le sirvan tanto para la formación de sus estructuras como para la generación y reserva de energía (Andersen, 2013b;Barsanti & Gualtieri, 2006;Falkowski, 2006). Se las puede encontrar en todos los cuerpos acuáticos, en superficies húmedas, en la nieve, sin embargo, Domínguez (2013) menciona que, aunque son ubicuas, la mayoría de las especies se restringen a hábitats específicos, lo que dificulta su completa identificación y descripción.…”

Section: Caracterización General De Las Microalgasunclassified

“…Las formas de los tilacoides también varían de acuerdo con la especie de microalga, el medio en el cual se desarrolla y la forma en que reserva la energía, por ejemplo, algunos plásmidos contienen pirenoide, que es la acumulación de ribulosa 1,5 bifosfato carboxilasa/oxigenasa, (molécula clave en el ciclo de Calvin de la fotosíntesis). Curiosamente, solo las algas verdes almacenan los productos de la fotosíntesis dentro de sus cloroplastos (Andersen, 2013b;Ball et al, 2011;Singh & Saxena, 2015), lo que influye en los tipos de pretratamientos que se deben realizar para la extracción de los componentes de interés.…”

Section: Caracterización General De Las Microalgasunclassified

“…En cuanto a la pared celular, se trata de una estructura robusta, que permite a la célula aumentar su turgencia sin estallar, la protege y mantiene un equilibrio osmótico con el medio que la rodea permitiendo el paso de materiales mediante un intercambio selectivo que está definido por la composición bioquímica de la membrana. Las microalgas filamentosas y las que forman colonias conectan sus células a través de pasadizos formados en las paredes celulares llamados plasmodesmos (Andersen, 2013b;Singh & Saxena, 2015).…”

Section: Caracterización General De Las Microalgasunclassified

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Carbohidratos y proteínas en microalgas: potenciales alimentos funcionales

Galarza

2019

Braz. J. Food Technol.

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Resumen Las microalgas son organismos distribuidos en todo el planeta, con cientos de miles de especies desde que se tienen registros. Sus componentes con potenciales propiedades benéficas en la nutrición y la salud han despertado el interés científico, industrial y comercial. En las últimas décadas se han logrado desarrollar varios productos, entre ellos alimentos funcionales, usando compuestos extraídos de ellas o con la totalidad de su biomasa. Su alta tasa de crecimiento, bajo consumo de nutrientes, relativamente pequeño espacio de producción, plantean un horizonte prometedor como recurso renovable y con grandes beneficios. Las tecnologías para su aprovechamiento se han incrementado y adaptado para mejorar el rendimiento y la calidad, sin embargo, los científicos reconocen que aún existen una serie de desafíos por superar.

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The Microalgal Cell

Cited by 35 publications

References 79 publications

Towards the production of microalgae biofuels: the effect of the culture medium on lipid deposition

Towards the production of microalgae biofuels: the effect of the culture medium on lipid deposition

Bioprocess strategies for enhancing biomolecules productivity in Chlorella fusca LEB 111 using CO₂ a carbon source

Carbohidratos y proteínas en microalgas: potenciales alimentos funcionales

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The Microalgal Cell

Cited by 35 publications

References 79 publications

Towards the production of microalgae biofuels: the effect of the culture medium on lipid deposition

Towards the production of microalgae biofuels: the effect of the culture medium on lipid deposition

Bioprocess strategies for enhancing biomolecules productivity in Chlorella fusca LEB 111 using CO2 a carbon source

Carbohidratos y proteínas en microalgas: potenciales alimentos funcionales

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Bioprocess strategies for enhancing biomolecules productivity in Chlorella fusca LEB 111 using CO₂ a carbon source