Microwave hydrothermal processing of Undaria pinnatifida for bioactive peptides

Queffelec, Julie; Flórez‐Fernández, Noelia; Domı́nguez, Herminia; Torres, M.D.

doi:10.1016/j.biortech.2021.125882

Cited by 20 publications

(14 citation statements)

References 49 publications

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“…The carbon content of the dehydrated samples was measured by flash combustion technology employing a gas chromatographic EA 1112 analyzer with a thermal conductivity detector (Thermo Flash, Berlin, Germany), following the procedure previously detailed in [ 22 ]. Carbohydrate profiles were determined by means of high-performance liquid chromatography (HPLC) with a previous acid hydrolysis treatment [ 22 ]. Concisely, samples were initially treated at 30 °C with sulfuric acid (72% ( v / v )) for 60 min, followed by a treatment at a lower solvent content (4% ( v / v )) at 121 °C for 60 min.…”

Section: Methodsmentioning

confidence: 99%

Ultrasound-Assisted Extraction of High-Value Fractions from Fruit Industrial Processing Waste

Esteban-Lustres

Sanz

Domı́nguez

et al. 2022

Foods

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This work deals with the valorization of fruit industrial processing waste pretreated with two dehydration methods, air oven and lyophilization. Ultrasound-assisted extraction using a sonication probe was selected to recover the high-value fractions. A battery of experiments following a Box–Behnken design was planned to evaluate the effect of the ultrasound amplitude, extraction duration, and temperature on the yield, protein content, phenolic content, and antiradical capacity of the soluble extracts. Operating at a fixed frequency (24 kHz) and solid:water ratio (1:15), the models predicted (significance degree >95%) the maximum extraction conditions of 69.7% amplitude, 53.43 °C, and 12 min for conventionally dehydrated fruit waste. Under these processing conditions, 52.6% extraction yield was achieved, with a protein content of 0.42 mg/g, total phenolic content of 116.42 mg GAE/g, and antioxidant capacity of 44.95 mg Trolox/g. Similar yields (53.95%) and a notably higher protein content (0.69 mg/g), total phenolic content (135.32 mg GAE/g), and antioxidant capacity (49.52 mg Trolox/g) were identified for lyophilized fruit waste. This treatment required a longer dehydration pretreatment duration (double), higher ultrasound amplitude (80%), and higher extraction temperature (70 °C), but shorter extraction time (4 min). These outcomes highlighted the important impact of the dehydration method on the valorization of the tested waste, with conventional drying saving costs, but the lyophilization procedure enhancing the bioactive features of the waste.

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Section: Methodsmentioning

confidence: 99%

Ultrasound-Assisted Extraction of High-Value Fractions from Fruit Industrial Processing Waste

Esteban-Lustres

Sanz

Domı́nguez

et al. 2022

Foods

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“…The optimal temperature depended on the operation mode (isothermal or non-isothermal) and on the seaweed species. Maximum fucoidan extraction yield during non-isothermal conventional heating was obtained during heating up to 170 °C for Sargassum muticum [ 180 ], up to 140 °C for Undaria pinnatifida [ 134 , 182 ], or during isothermal heating in autoclave at 120 °C for 3 h [ 131 , 183 ]. Increasing the subcritical water extraction temperature and time lowered the fucoidan yields, especially operating at 180 °C and 210 °C, due to degradation.…”

Section: Extraction and Purificationmentioning

confidence: 99%

Relevance of the Extraction Stage on the Anti-Inflammatory Action of Fucoidans

et al. 2023

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The anti-inflammatory action of fucoidans is well known, based on both in vitro and some in vivo studies. The other biological properties of these compounds, their lack of toxicity, and the possibility of obtaining them from a widely distributed and renewable source, makes them attractive novel bioactives. However, fucoidans’ heterogeneity and variability in composition, structure, and properties depending on seaweed species, biotic and abiotic factors and processing conditions, especially during extraction and purification stages, make it difficult for standardization. A review of the available technologies, including those based on intensification strategies, and their influence on fucoidan composition, structure, and anti-inflammatory potential of crude extracts and fractions is presented.

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“…The mineral content of the raw material was determined using several methods developed elsewhere [68]. In brief, 0.3 g of ash, 10 mL of nitric acid and 1 mL of hydrogen peroxide were mixed to perform an acidic digestion in a microwave (Marsxpress, CEM), operating at 200 W for 15 min before holding at 200 • C for 10 min.…”

Section: Minerals Contentmentioning

confidence: 99%

Biocosmetics Made with Saccharina latissima Fractions from Sustainable Treatment: Physicochemical and Thermorheological Features

Flórez-Fernández,

Ferreira-Anta,

Queffelec

et al. 2023

Marine Drugs

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This work deals with the formulation of natural cosmetics enriched with antioxidant fractions from the ultrasound treatment (US) of the brown seaweed Saccharina latissima. The challenge was the development of a cosmetic matrix without jeopardizing the thermorheological features of the creams, adding microparticles containing the antioxidant fractions using two different carriers, mannitol and alginate. The fundamental chemical characteristics of seaweed and the extracts obtained via sonication, as well as the antioxidant properties of the latter, were analyzed. The highest TEAC (Trolox equivalent antioxidant capacity) value was identified for the extracts subjected to the longest processing time using ultrasound-assisted extraction (240 min). A similar yield of microparticle formulation (around 60%) and load capacity (about 85%) were identified with mannitol and alginate as carriers. Color testing of the creams exhibited small total color differences. The rheological results indicated that the testing temperature, from 5 to 45 °C, notably influenced the apparent viscosity of the matrices. All creams were adequately fitted with the two parameters of the Ostwald–de Waele model, with the flow consistency index following an Arrhenius dependency with the testing temperature. Neither hysteresis nor water syneresis was observed in the proposed cosmetics during 6 months of cold storage at 4–6 °C.

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Microwave hydrothermal processing of Undaria pinnatifida for bioactive peptides

Cited by 20 publications

References 49 publications

Ultrasound-Assisted Extraction of High-Value Fractions from Fruit Industrial Processing Waste

Ultrasound-Assisted Extraction of High-Value Fractions from Fruit Industrial Processing Waste

Relevance of the Extraction Stage on the Anti-Inflammatory Action of Fucoidans

Biocosmetics Made with Saccharina latissima Fractions from Sustainable Treatment: Physicochemical and Thermorheological Features

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