Enhancement of the carbohydrate content in Spirulina by applying CO2, thermoelectric fly ashes and reduced nitrogen supply

Braga, Vagner da Silva; Moreira, Juliana Botelho; Costa, Jorge Alberto Vieira; Morais, Michele Greque de

doi:10.1016/j.ijbiomac.2018.12.037

Cited by 30 publications

(12 citation statements)

References 36 publications

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“…These results indicated that with a concomitant reduction in protein content, more carbohydrate accumulated under low CO2 concentrations (10-20%) and more lipid accumulated under high CO2 concentrations (30-70%). The results are similar with algae cultivated under nitrogen starvation to get more carbohydrate and lipid content (Zhu et al, 2014;Pancha et al, 2014;Braga et al, 2019). It is well known that the nitrogen is an essential nutrient for protein synthesis (Kolber et al, 1988).…”

Section: Effect Of Co2 Concentration On Biochemical Compositionsupporting

confidence: 77%

Study on high-CO2 tolerant Scenedesmus sp. and its mechanism via comparative transcriptomic analysis

Huang

Shi

Tao

et al. 2020

Journal of CO2 Utilization

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The emission of carbon dioxide (CO2) in the atmosphere at an increasingly high rate is the primary cause of global warming. The green algae Scenedesmus grown under 1-70 % CO2 conditions was evaluated to determine its potential for CO2 reduction coupled with lipid productivity. The algae showed maximum biomass (3.92 g L-1) at 10 % CO2 and high biomass (2.75 g L-1) at 70% CO2. Meanwhile, High CO2 levels (30-70%) was favorable for accumulation of lipid and the maximum lipid productivity was about 82.9 mg L-1 d-1. The mechanism of high CO2 tolerance of Scenedesmus was discussed with transcriptome analysis. It was found that the up-regulation of antioxidative system and down-regulation of CCM resulted in the acclimation of Scenedesmus under high CO2 conditions.

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Section: Effect Of Co2 Concentration On Biochemical Compositionsupporting

confidence: 77%

Study on high-CO2 tolerant Scenedesmus sp. and its mechanism via comparative transcriptomic analysis

Huang

Shi

Tao

et al. 2020

Journal of CO2 Utilization

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“…On the contrary, the carbohydrate content accumulated up to 44.78% DW, far higher than the normal content of carbohydrates in Arthrospira (12–20% DW) [ 1 ]. Nitrogen/phosphorus nutrient limitation, as well as salinity stress, have been reported to cause an increase in the carbohydrate content, and, inversely, a decrease in protein in Arthrospira [ 39 , 40 , 41 , 42 , 43 ]. However, even though the A. platensis were all cultured in industrial-scale raceway ponds, the carbohydrate content value in this study was lower than that reported by Liu et al [ 16 ].…”

Section: Discussionmentioning

confidence: 99%

Growth and Biochemical Composition Characteristics of Arthrospira platensis Induced by Simultaneous Nitrogen Deficiency and Seawater-Supplemented Medium in an Outdoor Raceway Pond in Winter

et al. 2021

Foods

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Arthrospira platensis, a well-known cyanobacterium, is widely applied not only in human and animal nutrition but also in cosmetics for its high amounts of active products. The biochemical composition plays a key role in the application performance of the Arthrospira biomass. The present study aimed to evaluate the growth and biochemical composition characteristics of A. platensis, cultured with a nitrogen-free and seawater-supplemented medium in an outdoor raceway pond in winter. The results showed that the biomass yield could achieve 222.42 g m−2, and the carbohydrate content increased by 247% at the end of the culture period (26 d), compared with that of the starter culture. The daily and annual areal productivities were 3.96 g m−2 d−1 and 14.44 ton ha−1 yr−1 for biomass and 2.88 g m−2 d−1 and 10.53 ton ha−1 yr−1 for carbohydrates, respectively. On the contrary, a profound reduction was observed in protein, lipid, and pigment contents. Glucose, the main monosaccharide in the A. platensis biomass, increased from 77.81% to 93.75% of total monosaccharides. Based on these results, large-scale production of carbohydrate-rich A. platensis biomass was achieved via a low-cost culture, involving simultaneous nitrogen deficiency and supplementary seawater in winter.

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“…For instance, Spirulina platensis microalgae have been described to be mainly composed of proteins, which typically range from 40% to 70% [38,39], while carbohydrates (8-16%) and lipids (4-11%) are minor constituents [38]. However, some studies stated that Spirulina platensis cells cultivated in nitrogen-deficient media [40,41] and genetically-modified species with higher growth rates [42] possess lower protein content than the wild type microalgae. Scenedesmus almeriensis has been reported to be composed mainly of proteins and carbohydrates [43], while similar protein, lipid and ash contents to the ones provided in Table 1 have been previously reported for Nannochloropsis gaditana [44].…”

Section: Chemical Composition Of Microalgae Before and After Ultrasound Treatmentmentioning

confidence: 99%

Composition and rheological properties of microalgae suspensions: Impact of ultrasound processing

et al. 2020

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In this study the rheological properties of aqueous suspensions of three microalgae species, Nannochloropsis gaditana, Scenedesmus almeriensis and Spirulina platensis, were investigated as a function of solids content, and related to their composition and microstructure. In addition, the impact of ultrasound processing on their structuring ability was also studied. The less rigid character of the Spirulina platensis cell walls (with very low carbohydrate contents) and the presence of extracellular components promoted cell-cell interactions, yielding suspensions which showed a shear thinning behaviour at lower concentrations than Nannochloropsis gaditana and Scenedesmus almeriensis. It is noteworthy that the three species showed different viscoelastic properties at 25 wt. % total solids. Spirulina platensis suspensions showed a more elastic behaviour and lower frequency dependence, characteristic of weak gels, whilst Nannochloropsis gaditana and Scenedesmus almeriensis behaved more like viscous liquids. The ultrasound treatment did not affect the cell wall integrity, but it promoted the release of intracellular components (some of which could have been partially degraded) and disrupted physical interparticle interactions in Nannochloropsis gaditana and Scenedesmus almeriensis. This has an impact on the rheological properties, increasing the viscosity of Nannochloropsis gaditana suspensions, while the viscosity of Scenedesmus almeriensis suspensions was reduced. The outcomes of this work give insights into the exploitation of these microalgae species in soft materials for food, pharma and other technological applications.

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Enhancement of the carbohydrate content in Spirulina by applying CO2, thermoelectric fly ashes and reduced nitrogen supply

Cited by 30 publications

References 36 publications

Study on high-CO2 tolerant Scenedesmus sp. and its mechanism via comparative transcriptomic analysis

Study on high-CO2 tolerant Scenedesmus sp. and its mechanism via comparative transcriptomic analysis

Growth and Biochemical Composition Characteristics of Arthrospira platensis Induced by Simultaneous Nitrogen Deficiency and Seawater-Supplemented Medium in an Outdoor Raceway Pond in Winter

Composition and rheological properties of microalgae suspensions: Impact of ultrasound processing

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