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Chen T, Li Y, Wang Y, Chen J, Fan L, Liu Z. Study on Quality Changes of Kelp Gel Edible Granules during Storage. Foods 2024; 13:2267. [PMID: 39063351 PMCID: PMC11275401 DOI: 10.3390/foods13142267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2024] [Revised: 07/11/2024] [Accepted: 07/16/2024] [Indexed: 07/28/2024] Open
Abstract
The kelp gel edible granules developed utilizing the gel properties of alginate are prone to quality deterioration if improperly stored during the storage process. This study comprehensively investigated the quality changes of kelp gel edible granules stored at 4 °C and 25 °C by evaluating indicators such as total bacterial count, coliform bacteria, pH, relaxation time, color difference, appearance, texture characteristics, gel strength, and sensory scoring. The results showed that during the storage at 4 °C, the total bacterial count remained within the national standard range, the hardness and chewiness increased, the gel strength first increased and then decreased, the partial exudation of the bound water in the product occurred, and the sensory score slightly decreased, with an overall minor change in quality. During the storage at 25 °C, significant quality changes were observed, with the total bacterial count exceeding the national standard on the 20th day; additionally, the hardness, chewiness, and gel strength all initially increased and then decreased, both the bound water and the restrained water in the product exuded, the moisture stability decreased, and the sensory score significantly decreased between 16 to 20 days. The spoilage of the product was characterized by a significant water loss, reduction in volume, color change from bright green to dark yellow-brown, and a distinct smell of decaying algae. No coliform bacteria was detected in all products during the storage period. In summary, the shelf life endpoint of the product stored at 25 °C is 16 days, and the shelf life of the product stored at 4 °C is greater than 20 days. Storage at 4 °C can better maintain product quality, extend the shelf life, and effectively maintain the overall color of the product.
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Affiliation(s)
- Tingru Chen
- Key Laboratory of Cultivation and High-Value Utilization of Marine Organisms in Fujian Province, National and Local Joint Engineering Research Center of Marine Biological Seed Industry Technology, Fisheries Research Institute of Fujian, Xiamen 361013, China; (T.C.); (Y.W.)
| | - Ying Li
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (Y.L.); (J.C.); (L.F.)
| | - Yin Wang
- Key Laboratory of Cultivation and High-Value Utilization of Marine Organisms in Fujian Province, National and Local Joint Engineering Research Center of Marine Biological Seed Industry Technology, Fisheries Research Institute of Fujian, Xiamen 361013, China; (T.C.); (Y.W.)
| | - Jicheng Chen
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (Y.L.); (J.C.); (L.F.)
| | - Lin’ao Fan
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (Y.L.); (J.C.); (L.F.)
| | - Zhiyu Liu
- Key Laboratory of Cultivation and High-Value Utilization of Marine Organisms in Fujian Province, National and Local Joint Engineering Research Center of Marine Biological Seed Industry Technology, Fisheries Research Institute of Fujian, Xiamen 361013, China; (T.C.); (Y.W.)
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Hofmann LC, Strauss S, Shpigel M, Guttman L, Stengel DB, Rebours C, Gjorgovska N, Turan G, Balina K, Zammit G, Adams JMM, Ahsan U, Bartolo AG, Bolton JJ, Domingues R, Dürrani Ö, Eroldogan OT, Freitas A, Golberg A, Kremer KI, Marques F, Milia M, Steinhagen S, Sucu E, Vargas-Murga L, Zemah-Shamir S, Zemah-Shamir Z, Meléndez-Martínez AJ. The green seaweed Ulva: tomorrow's "wheat of the sea" in foods, feeds, nutrition, and biomaterials. Crit Rev Food Sci Nutr 2024:1-36. [PMID: 38979936 DOI: 10.1080/10408398.2024.2370489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/10/2024]
Abstract
Ulva, a genus of green macroalgae commonly known as sea lettuce, has long been recognized for its nutritional benefits for food and feed. As the demand for sustainable food and feed sources continues to grow, so does the interest in alternative, plant-based protein sources. With its abundance along coastal waters and high protein content, Ulva spp. have emerged as promising candidates. While the use of Ulva in food and feed has its challenges, the utilization of Ulva in other industries, including in biomaterials, biostimulants, and biorefineries, has been growing. This review aims to provide a comprehensive overview of the current status, challenges and opportunities associated with using Ulva in food, feed, and beyond. Drawing on the expertise of leading researchers and industry professionals, it explores the latest knowledge on Ulva's nutritional value, processing methods, and potential benefits for human nutrition, aquaculture feeds, terrestrial feeds, biomaterials, biostimulants and biorefineries. In addition, it examines the economic feasibility of incorporating Ulva into aquafeed. Through its comprehensive and insightful analysis, including a critical review of the challenges and future research needs, this review will be a valuable resource for anyone interested in sustainable aquaculture and Ulva's role in food, feed, biomaterials, biostimulants and beyond.
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Affiliation(s)
- Laurie C Hofmann
- Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research, Bremerhaven, Germany
- Bremerhaven University of Applied Sciences, Bremerhaven, Germany
| | | | - Muki Shpigel
- Morris Kahn Marine Research Station, The Leon H. Charney School of Marine Sciences, University of Haifa, Haifa, Israel
| | - Lior Guttman
- The National Center for Mariculture, Israel Oceanographic & Limnological Research, Eilat, Israel
- Department of Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Dagmar B Stengel
- Botany and Plant Science, School of Natural Sciences, University of Galway, Galway, Ireland
| | | | - Natasha Gjorgovska
- Institute of Animal Science and Fishery, University Ss Ciril and Methodius in Skopje, Skopje, North Macedonia
| | - Gamze Turan
- Aquaculture Department, Fisheries Faculty, Ege University, Bornova, Izmir, Türkiye
| | - Karina Balina
- Institute of Microbiology and Biotechnology, University of Latvia, Riga, Latvia
- Institute of Science and Innovative Technologies, Liepaja University, Liepaja, Latvia
| | - Gabrielle Zammit
- Department of Biology, Faculty of Science, University of Malta, Msida, Malta
| | - Jessica M M Adams
- Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, Aberystwyth, UK
| | - Umair Ahsan
- Department of Plant and Animal Production, Burdur Vocational School of Food, Agriculture and Livestock, Burdur Mehmet Akif Ersoy University, Burdur, Turkiye
- Center for Agriculture, Livestock and Food Research, Burdur Mehmet Akif Ersoy University, Burdur, Turkiye
| | | | - John J Bolton
- Department of Biological Sciences, University of Cape Town, Rondebosch, South Africa
| | - Rosário Domingues
- Department of Chemistry, Lipidomics Laboratory, Mass Spectrometry Centre, University of Aveiro, Santiago University Campus, Aveiro, Portugal
- Department of Chemistry, CESAM - Centre for Environmental and Marine Studies, University of Aveiro, Santiago University Campus, Aveiro, Portugal
| | - Ömerhan Dürrani
- Department of Fisheries Technology Engineering, Faculty of Marine Science, Karadeniz Technical University, Trabzon, Türkiye
| | - Orhan Tufan Eroldogan
- Department of Aquaculture, Faculty of Fisheries, Cukurova University, Adana, Türkiye
- Biotechnology Research and Application Center, Cukurova University, Adana, Türkiye
| | - Andreia Freitas
- National Institute for Agricultural and Veterinary Research (INIAV), Rua dos Lágidos, Lugar da Madalena, Vila do Conde, Portugal
- REQUIMTE/LAQV, R. D. Manuel II, Oporto, Portugal
| | - Alexander Golberg
- Department of Environmental Studies, Faculty of Exact Sciences, Porter School of Environment and Earth Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Kira I Kremer
- Marine Biology, University of Bremen, Bremen, Germany
| | - Francisca Marques
- Department of Chemistry, Lipidomics Laboratory, Mass Spectrometry Centre, University of Aveiro, Santiago University Campus, Aveiro, Portugal
- Department of Chemistry, CESAM - Centre for Environmental and Marine Studies, University of Aveiro, Santiago University Campus, Aveiro, Portugal
| | - Massimo Milia
- Department of Life and Environmental Science, University of Cagliari, Cagliari, Italy
| | - Sophie Steinhagen
- Department of Marine Sciences, Tjärnö Marine Laboratory, University of Gothenburg, Strömstad, Sweden
| | - Ekin Sucu
- Department of Animal Science, Agricultural Faculty, Bursa Uludag University, Bursa, Turkey
| | - Liliana Vargas-Murga
- Department of Chemical and Agricultural Engineering and Agrifood Technology, Polytechnic School, Universitat de Girona, Girona, Spain
| | - Shiri Zemah-Shamir
- School of Sustainability, Reichman University (IDC Herzliya), Herzliya, Israel
| | - Ziv Zemah-Shamir
- Department of Marine Biology, Leon H. Charney School of Marine Sciences, University of Haifa, Haifa, Israel
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Akomea-Frempong S, Skonberg DI, Arya R, Perry JJ. Survival of Inoculated Vibrio spp., Shigatoxigenic Escherichia coli, Listeria monocytogenes, and Salmonella spp. on Seaweed (Sugar Kelp) During Storage. J Food Prot 2023; 86:100096. [PMID: 37100391 DOI: 10.1016/j.jfp.2023.100096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 04/14/2023] [Accepted: 04/19/2023] [Indexed: 04/28/2023]
Abstract
Bacteria including Vibrio spp. persist in coastal waters and can contaminate edible seaweeds. Pathogens such as Listeria monocytogenes, shigatoxigenic Escherichia coli (STEC), and Salmonella have been associated with and present serious health risks in minimally processed vegetables including seaweeds. This study evaluated the survival of four pathogens inoculated onto two product forms of sugar kelp subjected to different storage temperatures. The inoculation comprised of a cocktail of two Listeria monocytogenes and STEC strains, two Salmonella serovars, and two Vibrio species. STEC and Vibrio were grown and applied in salt-containing media to simulate preharvest contamination, whereas L. monocytogenes and Salmonella inocula were prepared to simulate postharvest contamination. Samples were stored at 4°C and 10°C for 7 days, and 22°C for 8 h. Microbiological analyses were performed periodically (1, 4, 8, 24 h, etc.) to evaluate the effects of storage temperature on pathogen survival. Pathogen populations decreased under all storage conditions, but survival was greatest for all species at 22°C, with STEC exhibiting significantly less reduction (1.8 log CFU/g) than Salmonella, L. monocytogenes, and Vibrio (3.1, 2.7, and 2.7 log CFU/g, respectively) after storage. The largest population reduction (5.3 log CFU/g) was observed in Vibrio stored at 4°C for 7 days. Regardless of storage temperature, all pathogens remained detectable at the end of the study duration. Results emphasize the need for strict adherence to temperature control for kelp as temperature abuse may support pathogen survival, especially STEC, during storage, and the need for prevention of postharvest contamination, particularly with Salmonella.
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Affiliation(s)
- Samuel Akomea-Frempong
- School of Food and Agriculture, University of Maine, 5735 Hitchner Hall, Orono, ME 04469, USA.
| | - Denise I Skonberg
- School of Food and Agriculture, University of Maine, 5735 Hitchner Hall, Orono, ME 04469, USA.
| | - Richa Arya
- School of Food and Agriculture, University of Maine, 5735 Hitchner Hall, Orono, ME 04469, USA.
| | - Jennifer J Perry
- School of Food and Agriculture, University of Maine, 5735 Hitchner Hall, Orono, ME 04469, USA.
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Lafeuille B, Tamigneaux É, Berger K, Provencher V, Beaulieu L. Variation of the Nutritional Composition and Bioactive Potential in Edible Macroalga Saccharina latissima Cultivated from Atlantic Canada Subjected to Different Growth and Processing Conditions. Foods 2023; 12:foods12081736. [PMID: 37107531 PMCID: PMC10137355 DOI: 10.3390/foods12081736] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 04/12/2023] [Accepted: 04/17/2023] [Indexed: 04/29/2023] Open
Abstract
Macroalgae are a new food source in the Western world. The purpose of this study was to evaluate the impact of harvest months and food processing on cultivated Saccharina latissima (S. latissima) from Quebec. Seaweeds were harvested in May and June 2019 and processed by blanching, steaming, and drying with a frozen control condition. The chemical (lipids, proteins, ash, carbohydrates, fibers) and mineral (I, K, Na, Ca, Mg, Fe) compositions, the potential bioactive compounds (alginates, fucoidans, laminarans, carotenoids, polyphenols) and in vitro antioxidant potential were investigated. The results showed that May specimens were significantly the richest in proteins, ash, I, Fe, and carotenoids, while June macroalgae contained more carbohydrates. The antioxidant potential of water-soluble extracts (Oxygen Radical Absorbance Capacity [ORAC] analysis-625 µg/mL) showed the highest potential in June samples. Interactions between harvested months and processing were demonstrated. The drying process applied in May specimens appeared to preserve more S. latissima quality, whereas blanching and steaming resulted in a leaching of minerals. Losses of carotenoids and polyphenols were observed with heating treatments. Water-soluble extracts of dried May samples showed the highest antioxidant potential (ORAC analysis) compared to other methods. Thus, the drying process used to treat S. latissima harvested in May seems to be the best that should be selected.
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Affiliation(s)
- Bétina Lafeuille
- Département de Science des Aliments, Faculté des Sciences de l'Agriculture et de l'Alimentation (FSAA), Université Laval, Québec, QC G1V 0A6, Canada
- Institut sur la Nutrition et les Aliments Fonctionnels (INAF), Québec, QC G1V 0A6, Canada
- Centre Nutrition, Santé et Société (NUTRISS), Université Laval, Québec, QC G1V 0A6, Canada
| | - Éric Tamigneaux
- Institut sur la Nutrition et les Aliments Fonctionnels (INAF), Québec, QC G1V 0A6, Canada
- École des Pêches et de L'aquaculture du Québec, Cégep de la Gaspésie et des Îles, Québec, QC G0C 1V0, Canada
- Merinov, Grande-Rivière, QC G0C 1V0, Canada
| | | | - Véronique Provencher
- Institut sur la Nutrition et les Aliments Fonctionnels (INAF), Québec, QC G1V 0A6, Canada
- Centre Nutrition, Santé et Société (NUTRISS), Université Laval, Québec, QC G1V 0A6, Canada
- École de Nutrition, Faculté des Sciences de l'Agriculture et de l'Alimentation (FSAA), Université Laval, Québec, QC G1V 0A6, Canada
| | - Lucie Beaulieu
- Département de Science des Aliments, Faculté des Sciences de l'Agriculture et de l'Alimentation (FSAA), Université Laval, Québec, QC G1V 0A6, Canada
- Institut sur la Nutrition et les Aliments Fonctionnels (INAF), Québec, QC G1V 0A6, Canada
- Québec-Océan, Université Laval, Québec, QC G1V 0A6, Canada
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Yang Z, Li X, Yu M, Jiang S, Qi H. Effects of Different Processing Methods on the Quality and Physicochemical Characteristics of Laminaria japonica. Foods 2023; 12:foods12081619. [PMID: 37107414 PMCID: PMC10137765 DOI: 10.3390/foods12081619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 04/02/2023] [Accepted: 04/07/2023] [Indexed: 04/29/2023] Open
Abstract
The effects of four domestic cooking methods, including blanching, steaming, boiling, and baking treatments, on processing properties, bioactive compound, pigments, flavor components, and tissue structure of Laminaria japonica were investigated. The results showed that the color and structure of kelp changed most obviously after baking; steaming was most beneficial in reducing the color change of the kelp (ΔE < 1), while boiling was most effective in maintaining the texture of the kelp (its hardness and chewiness were close to that of raw kelp); eight volatile compounds were detected in raw kelp, four and six compounds were detected in blanched and boiled kelp, while eleven and thirty kinds of compounds were detected in steamed and baked kelp, respectively. In addition, the contents of phloroglucinol and fucoxanthin in kelp after the four processing methods were significantly reduced (p < 0.05). However, of all the methods, steaming and boiling were the best at preserving these two bioactive substances (phloroglucinol and fucoxanthin) in kelp. Therefore, steaming and boiling seemed more appropriate to maintain the original quality of the kelp. Generally, to improve the sensory characteristics of each meal of Laminaria japonica and to maximize the retention of active nutrients, several different processing methods are provided according to the respective effects.
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Affiliation(s)
- Zuomiao Yang
- National Engineering Research Center of Seafood, Liaoning Provincial Aquatic Products Deep Processing, Technology Research Center, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China
| | - Xueting Li
- Haide College, Ocean University of China, Qingdao 266003, China
| | - Meiqi Yu
- National Engineering Research Center of Seafood, Liaoning Provincial Aquatic Products Deep Processing, Technology Research Center, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China
| | - Shan Jiang
- National Engineering Research Center of Seafood, Liaoning Provincial Aquatic Products Deep Processing, Technology Research Center, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China
| | - Hang Qi
- National Engineering Research Center of Seafood, Liaoning Provincial Aquatic Products Deep Processing, Technology Research Center, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China
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Dujardin B, Ferreira de Sousa R, Gómez Ruiz JÁ. Dietary exposure to heavy metals and iodine intake via consumption of seaweeds and halophytes in the European population. EFSA J 2023; 21:e07798. [PMID: 36742462 PMCID: PMC9887633 DOI: 10.2903/j.efsa.2023.7798] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
EFSA assessed the relevance of seaweed and halophyte consumption to the dietary exposure to heavy metals (arsenic, cadmium, lead and mercury) and the iodine intake in the European population. Based on sampling years 2011-2021, there were 2,093 analytical data available on cadmium, 1,988 on lead, 1,934 on total arsenic, 920 on inorganic arsenic (iAs), 1,499 on total mercury and 1,002 on iodine. A total of 697 eating occasions on halophytes, seaweeds and seaweed-related products were identified in the EFSA Comprehensive European Food Consumption Database (468 subjects, 19 European countries). From seaweed consumption, exposure estimates for cadmium in adult 'consumers only' are within the range of previous exposure estimates considering the whole diet, while for iAs and lead the exposure estimates represent between 10% and 30% of previous exposures from the whole diet for the adult population. Seaweeds were also identified as important sources of total arsenic that mainly refers, with some exceptions, to organic arsenic. As regards iodine, from seaweed consumption, mean intakes above 20 μg/kg body weight per day were identified among 'consumers only' of Kombu and Laver algae. The impact of a future increase in seaweed consumption ('per capita') on the dietary exposure to heavy metals and on iodine intake will strongly depend on the seaweeds consumed. The exposure estimates of heavy metals and iodine intakes in 'consumers only' of seaweeds were similar to those estimated in a replacement scenario with selected seaweed-based foods in the whole population. These results underline the relevance of the current consumption of seaweeds in the overall exposure to different heavy metals and in the intake of iodine. Recommendations are provided for further work needed on different areas to better understand the relationship between seaweed consumption and exposure to heavy metals and iodine intake.
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Assessment of Food Quality and Safety of Cultivated Macroalgae. Foods 2021; 11:foods11010083. [PMID: 35010208 PMCID: PMC8750098 DOI: 10.3390/foods11010083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 12/23/2021] [Accepted: 12/27/2021] [Indexed: 11/29/2022] Open
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Løvdal T, Lunestad BT, Myrmel M, Rosnes JT, Skipnes D. Microbiological Food Safety of Seaweeds. Foods 2021; 10:foods10112719. [PMID: 34829000 PMCID: PMC8619114 DOI: 10.3390/foods10112719] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 10/25/2021] [Accepted: 10/30/2021] [Indexed: 12/13/2022] Open
Abstract
The use of seaweeds in the human diet has a long history in Asia and has now been increasing also in the western world. Concurrent with this trend, there is a corresponding increase in cultivation and harvesting for commercial production. Edible seaweed is a heterogenous product category including species within the green, red, and brown macroalgae. Moreover, the species are utilized on their own or in combinatorial food products, eaten fresh or processed by a variety of technologies. The present review summarizes available literature with respect to microbiological food safety and quality of seaweed food products, including processing and other factors controlling these parameters, and emerging trends to improve on the safety, utilization, quality, and storability of seaweeds. The over- or misuse of antimicrobials and the concurrent development of antimicrobial resistance (AMR) in bacteria is a current worldwide health concern. The role of seaweeds in the development of AMR and the spread of antimicrobial resistance genes is an underexplored field of research and is discussed in that context. Legislation and guidelines relevant to edible seaweed are also discussed.
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Affiliation(s)
- Trond Løvdal
- Nofima–Norwegian Institute of Food, Fisheries and Aquaculture Research, Department of Process Technology, Richard Johnsens Gate 4, P.O. Box 8034, NO-4021 Stavanger, Norway; (J.T.R.); (D.S.)
- Correspondence:
| | - Bjørn Tore Lunestad
- Institute of Marine Research, Section for Contaminants and Biohazards, Nordnesgaten 50, P.O. Box 1870, NO-5005 Bergen, Norway;
| | - Mette Myrmel
- Virology Unit, Faculty of Veterinary Medicine, Norwegian University of Life Sciences, Elizabeth Stephansens vei 15, P.O. Box 5003, NO-1433 Ås, Norway;
| | - Jan Thomas Rosnes
- Nofima–Norwegian Institute of Food, Fisheries and Aquaculture Research, Department of Process Technology, Richard Johnsens Gate 4, P.O. Box 8034, NO-4021 Stavanger, Norway; (J.T.R.); (D.S.)
| | - Dagbjørn Skipnes
- Nofima–Norwegian Institute of Food, Fisheries and Aquaculture Research, Department of Process Technology, Richard Johnsens Gate 4, P.O. Box 8034, NO-4021 Stavanger, Norway; (J.T.R.); (D.S.)
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