Kappaphycus alvarezii macroalgae: An unexplored and valuable biomass for green biorefinery conversion

Andrade, Cristiano José de; Ferreira, Sandra R.S.

doi:10.1016/j.tifs.2020.07.018

Cited by 45 publications

(18 citation statements)

References 83 publications

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“…κ-carrageenan has one (25–30%), ι-carrageenan has two (28–30%), and λ-carrageenan has three (32–39%) of sulfate ester groups ( Muthukumar et al, 2020 ). The composition of carrageenan varies among species such as Kappaphycus alvarezii is a significant source of κ-carrageenan ( Rudke et al, 2020 ), Eucheuma denticulatum consists of ι-carrageenan ( Jönsson et al, 2020 ) and Gigartina skottsbergii and Chondrus crispus comprises of λ-carrageenan ( Zhu et al, 2018 ). Biological precursor carrageenan named μ (mu) and ν (nu) is subjected to hot alkaline treatment, which leads to the cyclization of 3,6 anhydro rings.…”

Section: Marine-derived Sulfated Polysaccharidesmentioning

confidence: 99%

Antiviral activity of sulfated polysaccharides from marine algae and its application in combating COVID-19: Mini review

Hans

Malik

Naik

2021

Bioresource Technology Reports

102

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Section: Marine-derived Sulfated Polysaccharidesmentioning

confidence: 99%

Antiviral activity of sulfated polysaccharides from marine algae and its application in combating COVID-19: Mini review

Hans

Malik

Naik

2021

Bioresource Technology Reports

102

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“…Being a low cost and fast growing red alga, Kappaphycus alvarezii is widely cultivated due to being edible as well as being a source of carrageenan [159,160]. However, several other uses have been assigned to this seaweed due to its' constitution and potential to be applied in a variety of commercial products [161]. Despite variability in extraction processes, these SWEs have been shown to contain nutrients, hormones and several other compounds.…”

Section: Kappaphycus Alvarezii and Gracilaria Edulismentioning

confidence: 99%

Recent Advances in the Molecular Effects of Biostimulants in Plants: An Overview

et al. 2021

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As the world develops and population increases, so too does the demand for higher agricultural output with lower resources. Plant biostimulants appear to be one of the more prominent sustainable solutions, given their natural origin and their potential to substitute conventional methods in agriculture. Classified based on their source rather than constitution, biostimulants such as humic substances (HS), protein hydrolysates (PHs), seaweed extracts (SWE) and microorganisms have a proven potential in improving plant growth, increasing crop production and quality, as well as ameliorating stress effects. However, the multi-molecular nature and varying composition of commercially available biostimulants presents challenges when attempting to elucidate their underlying mechanisms. While most research has focused on the broad effects of biostimulants in crops, recent studies at the molecular level have started to unravel the pathways triggered by certain products at the cellular and gene level. Understanding the molecular influences involved could lead to further refinement of these treatments. This review comprises the most recent findings regarding the use of biostimulants in plants, with particular focus on reports of their molecular influence.

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“…An advantage of using a “green” extraction solvent is the opportunity it provides to valorize the residue or a co-product that is soluble in sc-CO 2 [ 20 ]. Other red seaweed biorefinery approaches to valorizing the lipid fractions have been reported [ 27 , 41 , 44 ]. Peñuela et al [ 45 ] proposed an enzyme-assisted extraction of a water-soluble extract rich in proteins and sulfated polysaccharides, a lipid fraction rich in PUFA and microwave-assisted extraction of ι-carrageenan from Solieria filiformis .…”

Section: Resultsmentioning

confidence: 99%

“…This would be an alternative strategy to limit oxidation of the highly susceptible PUFA [ 24 , 25 , 26 ]. The integration of this process in a biorefinery process would allow the valorization of the exhausted solids [ 27 ]. Subcritical water processing has been proposed as a green technique suitable for the extraction of protein, polysaccharides and phenolics from vegetal and algal biomass [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

Extraction of Fatty Acids and Phenolics from Mastocarpus stellatus Using Pressurized Green Solvents

et al. 2021

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Polyunsaturated fatty acids are well known for their protective properties in relation to different skin diseases. Although seaweeds possess a low lipid fraction, they could act as an alternative renewable source of polyunsaturated fatty acids whenever other valuable seaweed components are also valorized. In this study, a biorefinery process using Mastocarpus stellatus as a model seaweed was proposed. The process started with the supercritical carbon dioxide extraction of the lipid and phenolic fractions. The influence of pressure during extraction with pure supercritical CO2 was studied while operating at a selected temperature and solvent flow rate. Kinetic data obtained during the ethanol-modified supercritical CO2 extraction were fitted to the spline model. Sequential processing was proposed with (i) pure CO2 to obtain a product with 30% PUFA content and ω-3:ω-6 ratio 1:1, (ii) ethanol-modified CO2 to extract phenolics, and (iii) microwave-assisted subcritical water extraction operating under previously optimized conditions for the extraction of phenolics, carrageenan and protein fractions. The composition of the supercritical extracts showed potential for use in both dietary and topical applications in skin care products. The remaining solids are suitable for the extraction of other valuable fractions.

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Kappaphycus alvarezii macroalgae: An unexplored and valuable biomass for green biorefinery conversion

Cited by 45 publications

References 83 publications

Antiviral activity of sulfated polysaccharides from marine algae and its application in combating COVID-19: Mini review

Antiviral activity of sulfated polysaccharides from marine algae and its application in combating COVID-19: Mini review

Recent Advances in the Molecular Effects of Biostimulants in Plants: An Overview

Extraction of Fatty Acids and Phenolics from Mastocarpus stellatus Using Pressurized Green Solvents

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