Microwave-Assisted Extraction of Polysaccharides

Soria, Ana C.; Ruiz‐Aceituno, Laura; Ramos, Lourdes; Sanz, Luz Maria

doi:10.1007/978-3-319-16298-0_43

Cited by 14 publications

(11 citation statements)

References 51 publications

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“…It is currently considered a very attractive alternative to conventional extraction approaches (e.g., the Soxhlet method). Recently, microwave irradiation has been shown to be a promising technique for the extraction and modification of polysaccharides from natural sources [ 61 ], including chitin chemistry. This method is mostly used as an alternative for the preparation of chitosan from various chitinous sources [ 62 , 63 , 64 , 65 ].…”

Section: Discussionmentioning

confidence: 99%

Express Method for Isolation of Ready-to-Use 3D Chitin Scaffolds from Aplysina archeri (Aplysineidae: Verongiida) Demosponge

Klinger

Żółtowska-Aksamitowska

Wysokowski

et al. 2019

Marine Drugs

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Sponges are a valuable source of natural compounds and biomaterials for many biotechnological applications. Marine sponges belonging to the order Verongiida are known to contain both chitin and biologically active bromotyrosines. Aplysina archeri (Aplysineidae: Verongiida) is well known to contain bromotyrosines with relevant bioactivity against human and animal diseases. The aim of this study was to develop an express method for the production of naturally prefabricated 3D chitin and bromotyrosine-containing extracts simultaneously. This new method is based on microwave irradiation (MWI) together with stepwise treatment using 1% sodium hydroxide, 20% acetic acid, and 30% hydrogen peroxide. This approach, which takes up to 1 h, made it possible to isolate chitin from the tube-like skeleton of A. archeri and to demonstrate the presence of this biopolymer in this sponge for the first time. Additionally, this procedure does not deacetylate chitin to chitosan and enables the recovery of ready-to-use 3D chitin scaffolds without destruction of the unique tube-like fibrous interconnected structure of the isolated biomaterial. Furthermore, these mechanically stressed fibers still have the capacity for saturation with water, methylene blue dye, crude oil, and blood, which is necessary for the application of such renewable 3D chitinous centimeter-sized scaffolds in diverse technological and biomedical fields.

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Section: Discussionmentioning

confidence: 99%

Express Method for Isolation of Ready-to-Use 3D Chitin Scaffolds from Aplysina archeri (Aplysineidae: Verongiida) Demosponge

Klinger

Żółtowska-Aksamitowska

Wysokowski

et al. 2019

Marine Drugs

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“…The impact of different microwave-assisted treatments on the antioxidant features of some sources of marine biomass has been reported ) [27]. This eco-friendly treatment not only can accelerate the extraction process, but also promote the recovery of fractions rich in phenolic or sulfate compounds selecting the adequate processing conditions [25,28,39]. Fig.…”

Section: Composition Of Microwave-treated Soluble Extractsmentioning

confidence: 99%

“…Microwave assisted extraction (MAE) is a relatively new, green and scalable process for the recovery of high valuable natural compounds [10,20,21,22], that could also be an attractive alternative for the recovery of hybrid carrageenans or antioxidants from macroalgae [23,24]. MAE allows a fast and uniform extraction, compact equipment, fast start-up, short time, less solvent and energy, which can be explained by the effect of microwaves on molecules by ionic conduction and dipole rotation [25,26]. Some authors [27] studied the microwaveassisted alkaline modification of red seaweed galactans to enhance their gelation behavior, accelerating the reaction several times with respect to that performed with conventional heating [18,23].…”

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confidence: 99%

The microwave assisted extraction sway on the features of antioxidant compounds and gelling biopolymers from Mastocarpus stellatus

2020

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Microwave assisted water extraction of hybrid carrageenan and antioxidant compounds from Mastocarpus stellatus red alga was first proposed to recover biopolymers with specific rheological properties, saving time, avoiding chemicals and enhancing extraction yields when compared with conventional treatments. The hybrid carrageenans, precipitated from the liquid fractions recovered after microwave assisted water extraction were analyzed by Fourier transform infrared attenuated total reflectance, high-performance size-exclusion chromatography and rheology. The corresponding soluble extracts were also characterized by total phenolic content, antioxidant capacity, proteins, sulfate and carbohydrate content. The highest phenolic, antioxidant capacity and sulfate content were observed at 190°C, without notable effect of heating time between 3 and 6 min. In contrast, a clear impact of both microwave heating temperature and time on the molecular weight distribution of hybrid carrageenans as well as on the viscoelastic behavior of formulated hydrogels was identified, being the strongest hydrogels achieved at 170°C for 6 min. It should be highlighted that all proposed hydrogels exhibited stable mechanical properties in the absence of syneresis for a month of cold storage, except those made with biopolymers obtained with the mildest extraction conditions (3 min at 70°C).

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“…However, during MAE, heating of the sample is produced in a targeted and selective process produced by the simultaneous combination of ionic conduction and dipole rotation which change microwave into thermal energy [22][23][24]. Subsequently, MAE provides shorter extraction times and more effective treatments due to the microwave properties-it can heat all samples simultaneously, without heating the vessel and with a faster energy transfer, reduce thermal gradients and unique heating selectivity, and ultimately afford better yields at lower costs [25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

“…Irradiation power can be also optimized; however, the number of extraction vessels simultaneously used mainly governs its selection. It is usually chosen as a compromise between minimizing the extraction time and avoiding solvent projections or degradation of thermolabile analytes [27]. The nature of the solvent also affects the extraction of bioactive carbohydrates; polar solvents such as water, methanol, or hydroalcoholic mixtures are commonly used.…”

Section: Introductionmentioning

confidence: 99%

Microwave Assisted Extraction of Bioactive Carbohydrates from Different Morphological Parts of Alfalfa (Medicago sativa L.)

Solarte

Ruiz‐Matute

Chito-Trujillo

et al. 2021

Foods

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Despite the nutritional properties of alfalfa, its production is mainly for animal feed and it is undervalued as a food source. In this study, the valorization of alfalfa as a potential source of bioactive carbohydrates [inositols, α-galactooligosaccharides (α-GOS)] is presented. A Box–Behnken experimental design was used to optimize the extraction of these carbohydrates from leaves, stems, and seeds of alfalfa by solid–liquid extraction (SLE) and microwave-assisted extraction (MAE). Optimal extraction temperatures were similar for both treatments (40 °C leaves, 80 °C seeds); however, SLE required longer times (32.5 and 60 min vs. 5 min). In general, under similar extraction conditions, MAE provided higher yields of inositols (up to twice) and α-GOS (up to 7 times); hence, MAE was selected for their extraction from 13 alfalfa samples. Pinitol was the most abundant inositol of leaves and stems (24.2–31.0 mg·g−1 and 15.5–22.5 mg·g−1, respectively) while seed extracts were rich in α-GOS, mainly in stachyose (48.8–84.7 mg·g−1). In addition, inositols and α-GOS concentrations of lyophilized MAE extracts were stable for up to 26 days at 50 °C. These findings demonstrate that alfalfa is a valuable source of bioactive carbohydrates and MAE a promising alternative technique to obtain functional extracts.

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Microwave-Assisted Extraction of Polysaccharides

Cited by 14 publications

References 51 publications

Express Method for Isolation of Ready-to-Use 3D Chitin Scaffolds from Aplysina archeri (Aplysineidae: Verongiida) Demosponge

Express Method for Isolation of Ready-to-Use 3D Chitin Scaffolds from Aplysina archeri (Aplysineidae: Verongiida) Demosponge

The microwave assisted extraction sway on the features of antioxidant compounds and gelling biopolymers from Mastocarpus stellatus

Microwave Assisted Extraction of Bioactive Carbohydrates from Different Morphological Parts of Alfalfa (Medicago sativa L.)

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