Scenedesmus sp. cultivation using commercial-grade ammonium sources

Soares, Jimmy; Loterio, Robson Kriiger; Rosa, Rinamara Martins; Santos, M. O. dos; Nascimento, Antônio Galvão do; Santos, Nerílson Terra; Williams, Thomas Christopher Rhys; Nunes‐Nesi, Adriano; Martins, Márcio Arêdes

doi:10.1007/s13213-017-1315-x

Cited by 29 publications

(13 citation statements)

References 46 publications

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“…Silva et al (2020), found values of 05.57% for lipids, 28.0% for carbohydrates, and 15.64% for ash. The values of the centesimal composition of microalgae vary within the same species according to the type of cultivation used, collection time, and stress factors, such for example, as absence or excess of nutrients (AFIFY et al, 2018;;ROCHA et al, 2019;SILVA et al, 2020;SOARES et al, 2018).…”

Section: Resultsmentioning

confidence: 99%

Microalga Scenedesmus obliquus: extraction of bioactive compounds and antioxidant activity

Silva

Martins

Leite

et al. 2021

Revista Ciência Agronômica

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M icroalgae have been researched as a sustainable source of bioactive compounds for the food and pharmaceutical industries. The objectives of this work were the extraction and the characterization of fatty acids of Scenedesmus obliquus and to separate, quantify, and evaluate the antioxidant capacity of carotenoids and phenolic compounds of this microalga. The microalga cells were disrupted by using ultrasound. The centesimal composition of lyophilized cells was determined. Fatty acids of the oil were converted into methyl esters and analyzed by gas chromatography (flame ionization detector) to obtain the fatty acid profile. Acetone, petroleum ether, and hexane were the solvents applied to extract the carotenoids and ethanol was used to separate the phenolic compounds. The antioxidant activity of the extracts was determined by the DPPH method. The amount of polyunsaturated fatty acids corresponded to 47.31% of the total for unsaturated, with the predominance of linolenic acid (16.74%) and approximately 9.70% of omega-6. The content of extracted carotenoids was higher by using hexane. Total phenolics concentration of 1.12 g 100 g -1 microalga was found. High percentages of oxidation inhibition were observed for the extracts of carotenoids (>88%) and phenolic compounds (>72%). Therefore, Scenedesmus obliquus presents itself as an alternative, natural, and sustainable source of bioactive compounds.

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Section: Resultsmentioning

confidence: 99%

Microalga Scenedesmus obliquus: extraction of bioactive compounds and antioxidant activity

Silva

Martins

Leite

et al. 2021

Revista Ciência Agronômica

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“…Nitrogen is another factor affecting the production of proteins in microalgae [ 117 ]. The use of low-cost nitrogen sources such as agricultural fertilizers and urea is recommended for the nutrition of some microalgae strains [ 118 , 119 ]. Light quality and intensity, nutrients, temperature, halostress, carbon supply and source, and climate conditions are some other parameters able to improve the protein productivity in microalgae [ 120 , 121 , 122 , 123 ].…”

Section: Microalgal Proteinsmentioning

confidence: 99%

Microalgae as Contributors to Produce Biopolymers

et al. 2021

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Biopolymers are very favorable materials produced by living organisms, with interesting properties such as biodegradability, renewability, and biocompatibility. Biopolymers have been recently considered to compete with fossil-based polymeric materials, which rase several environmental concerns. Biobased plastics are receiving growing interest for many applications including electronics, medical devices, food packaging, and energy. Biopolymers can be produced from biological sources such as plants, animals, agricultural wastes, and microbes. Studies suggest that microalgae and cyanobacteria are two of the promising sources of polyhydroxyalkanoates (PHAs), cellulose, carbohydrates (particularly starch), and proteins, as the major components of microalgae (and of certain cyanobacteria) for producing bioplastics. This review aims to summarize the potential of microalgal PHAs, polysaccharides, and proteins for bioplastic production. The findings of this review give insight into current knowledge and future direction in microalgal-based bioplastic production considering a circular economy approach. The current review is divided into three main topics, namely (i) the analysis of the main types and properties of bioplastic monomers, blends, and composites; (ii) the cultivation process to optimize the microalgae growth and accumulation of important biobased compounds to produce bioplastics; and (iii) a critical analysis of the future perspectives on the field.

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“…Among the biostimulants used in agriculture, Ascophyllum nodosum (L.) Le Jolis seaweed-based extracts stood out for containing plant hormones that regulate and stimulate plant growth in addition to macro and micronutrients, pigments, vitamins, amino acids and others osmoprotective compounds (Michalak et al, 2016;Soares et al, 2018;Raghunandan et al, 2019). The attenuating effect of applying A. nodosum extract is reported for several crops, as in the case of Rosa et al (2021) that improved the antioxidant activity of soybean (Glycine max L.) increasing productivity under water stress.…”

Section: Introductionmentioning

confidence: 99%

Photochemical efficiency, biomass and chlorophyll of phyális under salinity and biostimulant

Nóbrega

Fátima

Ferreira

et al. 2021

Agraria

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Physalis peruviana L. has great exploitation potential especially for small producers in the Brazilian Northeast. However, production in semiarid regions may be limited by high salt content in soils and water sources used for irrigation. Thus, this study evaluated the application of Ascophyllum nodosum seaweed extract as saline stress attenuator in P. peruviana L. The randomized block design was used, in an incomplete 5 × 5 factorial scheme, with five of electrical conductivities of the irrigation water (0.50, 1.23, 3.00, 4.77 and 5.50 dS m -1 ) and five increasing concentrations of kelp extract (0.00, 1.45, 5.00, 8.55 and 10.00 mL L -1 ), with nine combinations generated by the Central Box matrix, with four replicates of four plants to evaluate the effect on phytomass accumulation, chlorophyll fluorescence and pigment content. Results showed, salinity significantly reduced biomass production and chlorophyll fluorescence and pigment indices. However, when plants were treated with 9.9 mL L -1 seaweed extract they increased biomass production and seedling quality. On the other hand, up to 4.1 mL L -1 , the biostimulant increased dark-adapted fluorescence indices which indicate it reduces damages to the photosynthetic apparatus caused by salt-stress and thus improving photosynthetic activity and photoassimilates production. Thus the application of A. nodosum seaweed extract attenuates the deleterious effect of salt stress in photosynthesis and thus in biomass production of P. peruviana plants.

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Scenedesmus sp. cultivation using commercial-grade ammonium sources

Cited by 29 publications

References 46 publications

Microalga Scenedesmus obliquus: extraction of bioactive compounds and antioxidant activity

Microalga Scenedesmus obliquus: extraction of bioactive compounds and antioxidant activity

Microalgae as Contributors to Produce Biopolymers

Photochemical efficiency, biomass and chlorophyll of phyális under salinity and biostimulant

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