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Marine Bioactive Compounds: Applications in Food Science

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A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Natural Products Chemistry".

Deadline for manuscript submissions: closed (15 August 2021) | Viewed by 11786

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Dr. Sónia Barroso

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MARE-Marine and Environmental Sciences Centre, Polytechnic of Leiria, Peniche, Portugal
Interests: chemistry; extraction; food; marine resources; valorization
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Marine organisms are a rich source of natural bioactive compounds with potential applications in medicine, pharmaceuticals, cosmetics, nutraceutics, and food, among others. Marine-derived bioactive compounds include polysaccharides, sterols, proteins, polyunsaturated fatty acids (PUFAs), antioxidants, and pigments. Many of these bioactive compounds have been related to health benefits since they play a significant role in the prevention of several pathologies due to their antioxidant, anticancer, and antibacterial effects, to mention a few. Marine organisms are therefore very attractive sources of nutritional and functional food ingredients.

This Special Issue aims at collecting papers dealing with the applications of bioactive compounds derived from marine resources in food science. Papers dealing with, but not limited to, the following are welcome:

- Extraction, isolation, and characterization of bioactive compounds;

- Bioactivity of selected extracts;

- Shelf-life extension;

- Bioavailability/bioaccessibility studies.

Dr. Sónia Duarte Barroso
Guest Editor

Manuscript Submission Information

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Keywords

Bioactive compounds
Marine resources
Bioactivity
Structure–activity relationship
Functional foods
Food sciences

Published Papers (4 papers)

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Research

21 pages, 2484 KiB

Open AccessArticle

Seasonal Evaluation of Phlorotannin-Enriched Extracts from Brown Macroalgae Fucus spiralis

by Belén Almeida, Sónia Barroso, Ana S. D. Ferreira, Pedro Adão, Susana Mendes and Maria M. Gil

Molecules 2021, 26(14), 4287; https://doi.org/10.3390/molecules26144287 - 15 Jul 2021

Cited by 11 | Viewed by 2508

Abstract

Fucus spiralis that was collected in the four seasons was submitted to an extraction with ethanol:water (crude extracts Et80), followed by a liquid–liquid fractionation with organic solvents (fraction He from n-hexane; aqueous fractions AQ1, AQ2, AQ3 and AQ4; ethyl acetate fraction EA), with the aim of obtaining phlorotannin-enriched extracts. All the extracts (Et80, He, AQ1, AQ2, AQ3, AQ4 and EA) that were obtained for the F. spiralis of the four seasons were evaluated for their antioxidant capacity and total phenolic compounds. The summer extracts presented the highest contents in polyphenols (TPC), as well as the highest ferric reducing antioxidant power (FRAP), when compared to the samples from the other seasons. The reductive percentage of the DPPH (2,2-diphenyl-1-picryl-hydrazyl-hydrate) compound was similar between the seasons. For all the seasons, the EA extract showed the highest polyphenol content (TPC), and the highest antioxidant capacity (highest ferric reducing power (FRAP) and lowest concentration needed to reduce 50% of the DPPH compound), which is in agreement with a phlorotannin-enriched fraction. This study revealed that the polyphenol content and antioxidant power of the F. spiralis extracts are influenced by the time of harvest, as well as by the solvents used for their extraction. Full article

(This article belongs to the Special Issue Marine Bioactive Compounds: Applications in Food Science)

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14 pages, 2348 KiB

Open AccessFeature PaperArticle

Bioprocessing of Marine Chitinous Wastes for the Production of Bioactive Prodigiosin

by Thi-Hanh Nguyen, San-Lang Wang, Dai-Nam Nguyen, Anh-Dzung Nguyen, Thi-Huyen Nguyen, Manh-Dung Doan, Van-Anh Ngo, Chien-Thang Doan, Yao-Haur Kuo and Van-Bon Nguyen

Molecules 2021, 26(11), 3138; https://doi.org/10.3390/molecules26113138 - 24 May 2021

Cited by 25 | Viewed by 3100

Abstract

Recently, microbial prodigiosin (PG) has received much attention due to its numerous beneficial applications. The aim of this study was to establish the bioprocessing of marine chitinous wastes (MCWs) for the cost-effective preparation of PG. Of the MCWs, demineralized shrimp shell powders (de-SSP) were found to be a potential source of carbon/nitrogen (C/N) for PG production by bacterial fermentation using Serratia marcescens strains. Further, PG scale-up production was investigated in a 15 L bioreactor system, and the highest yield (6200 mg/L) was achieved during fermentation using 5 L of a novel-designed culture broth that included 1.60% C/N sources (a de-SSP/casein ratio of 7/3), 0.02% K₂SO_4, and 0.05% K₂HPO₄, with an initial pH of 6–7. Fermentation was conducted in the dark at 27.5 °C for 8.0 h. This study was the first to report on the utilization of shrimp wastes for cost-effective, large-scale (5 L/pilot) PG production with high productivity (6200 mg/L) in a short cultivation time. The combination of 0.02% K₂SO₄ and 0.05% K₂HPO₄ was also found to be a novel salt composition that significantly enhanced PG yield. The red compound was purified and confirmed as PG after analyzing its HPLC profile, mass, and UV/vis spectra. The purified PG was then tested for its bioactivities and showed effective anticancer activities, moderated antioxidant activities, and novel anti-NO effects. Full article

(This article belongs to the Special Issue Marine Bioactive Compounds: Applications in Food Science)

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12 pages, 2374 KiB

Open AccessArticle

Macrocystis pyrifera Extract Residual as Nutrient Source for the Production of Sophorolipids Compounds by Marine Yeast Rhodotorula rubra

by Allison Leyton, Michael Araya, Fadia Tala, Liset Flores, María Elena Lienqueo and Carolina Shene

Molecules 2021, 26(8), 2355; https://doi.org/10.3390/molecules26082355 - 18 Apr 2021

Cited by 5 | Viewed by 2443

Abstract

Seaweed processing generates liquid fraction residual that could be used as a low-cost nutrient source for microbial production of metabolites. The Rhodotorula strain is able to produce antimicrobial compounds known as sophorolipids. Our aim was to evaluate sophorolipid production, with antibacterial activity, by marine Rhodotorula rubra using liquid fraction residual (LFR) from the brown seaweed Macrocystis pyrifera as the nutrient source. LFR having a composition of 32% w/w carbohydrate, 1% w/w lipids, 15% w/w protein and 52% w/w ash. The best culture condition for sophorolipid production was LFR 40% v/v, without yeast extract, artificial seawater 80% v/v at 15 °C by 3 growth days, with the antibacterial activity of 24.4 ± 3.1 % on Escherichia coli and 21.1 ± 3.8 % on Staphylococcus aureus. It was possible to identify mono-acetylated acidic and methyl ester acidic sophorolipid. These compounds possess potential as pathogen controllers for application in the food industry. Full article

(This article belongs to the Special Issue Marine Bioactive Compounds: Applications in Food Science)

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12 pages, 5665 KiB

Open AccessArticle

Optimization of Extraction Conditions for Gracilaria gracilis Extracts and Their Antioxidative Stability as Part of Microfiber Food Coating Additives

by João Reboleira, Rui Ganhão, Susana Mendes, Pedro Adão, Mariana Andrade, Fernanda Vilarinho, Ana Sanches-Silva, Dora Sousa, Artur Mateus and Susana Bernardino

Molecules 2020, 25(18), 4060; https://doi.org/10.3390/molecules25184060 - 5 Sep 2020

Cited by 8 | Viewed by 2469

Abstract

Incorporation of antioxidant agents in edible films and packages often relies in the usage of essential oils and other concentrated hydrophobic liquids, with reliable increases in antimicrobial and antioxidant activities of the overall composite, but with less desirable synthetic sources and extraction methods. Hydroethanolic extracts of commercially-available red macroalgae Gracilaria gracilis were evaluated for their antioxidant potential and phenolic content, as part of the selection of algal biomass for the enrichment of thermoplastic film coatings. The extracts were obtained through use of solid-liquid extractions, over which yield, DPPH radical reduction capacity, total phenolic content, and FRAP activity assays were measured. Solid-to-liquid ratio, extraction time, and ethanol percentages were selected as independent variables, and response surface methodology (RSM) was then used to estimate the effect of each extraction condition on the tested bioactivities. These extracts were electrospun into polypropylene films and the antioxidant activity of these coatings was measured. Similar bioactivities were measured for both 100% ethanolic and aqueous extracts, revealing high viability in the application of both for antioxidant coating purposes, though activity losses as a result of the electrospinning process were above 60% in all cases. Full article

(This article belongs to the Special Issue Marine Bioactive Compounds: Applications in Food Science)

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