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Yuan L, Liu C, Li B, Wang S, Zhang H, Sun J, Mao X. A green extraction method for agar with improved thermal stability and water holding capacity. Int J Biol Macromol 2024; 278:134663. [PMID: 39134202 DOI: 10.1016/j.ijbiomac.2024.134663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 06/23/2024] [Accepted: 08/09/2024] [Indexed: 08/24/2024]
Abstract
The conventional agar extraction method has drawbacks such as high energy consumption, low yield, poor quality, and possible residual harmful factors, which greatly limit its application in high-end fields such as biomedicine and high-end materials. This work explored a new freezing-thawing-high-temperature coupling technique for agar extraction. It increased the yield and the strength of agar by 10.6 % and 13.7 %, respectively, as compared to direct high-temperature extraction of agar (HA). The greater molecular weight and lower sulfate content of agar obtained from freeze-thaw cycles combined with high temperature extraction (FA) may be attributed to the desulfurization effect caused by freeze-thaw cycles and the preservation of the molecular chain structure. The reduction in sulfate content decreases the steric hindrance resistance of the polysaccharide chains, enhances their interactions, and promotes the regularity and density of the agar structure, while also improving its water retention and thermal stability. In conclusion, this research can offer a theoretical basis and guidance for the eco-friendly extraction of agar with improved agar characteristics and expended its applications.
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Affiliation(s)
- Long Yuan
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, PR China; Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, PR China; Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, PR China
| | - Chunhui Liu
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, PR China; Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, PR China; Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, PR China
| | - Bolun Li
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, PR China; Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, PR China; Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, PR China
| | - Sai Wang
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, PR China; Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, PR China; Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, PR China
| | - Haiyang Zhang
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, PR China; Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, PR China; Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, PR China
| | - Jianan Sun
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, PR China; Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, PR China; Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, PR China.
| | - Xiangzhao Mao
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, PR China; Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, PR China; Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, PR China; Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, PR China.
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Oliveira S, Sousa I, Raymundo A, Bengoechea C. Three-Dimensional Printing of Red Algae Biopolymers: Effect of Locust Bean Gum on Rheology and Processability. Gels 2024; 10:166. [PMID: 38534584 DOI: 10.3390/gels10030166] [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: 01/31/2024] [Revised: 02/19/2024] [Accepted: 02/21/2024] [Indexed: 03/28/2024] Open
Abstract
Seaweeds, rich in high-value polysaccharides with thickening/gelling properties (e.g., agar, carrageenan, and alginate), are extensively used in the food industry for texture customization and enhancement. However, conventional extraction methods for these hydrocolloids often involve potentially hazardous chemicals and long extraction times. In this study, three red seaweed species (Chondrus crispus, Gelidium Corneum, and Gracilaria gracilis) commercialized as food ingredients by local companies were chosen for their native gelling biopolymers, which were extracted using water-based methodologies (i.e., (1) hydration at room temperature; (2) stirring at 90 °C; and (3) centrifugation at 40 °C) for production of sustainable food gels. The potential use of these extracts as bioinks was assessed employing an extrusion-based 3D printer. The present work aimed to study the gelation process, taken place during printing, and assess the effectiveness of the selected green extraction method in producing gels. To improve the definition of the printed gel, two critical printing parameters were investigated: the addition of locust bean gum (LBG) at different concentrations (0, 0.5, 1, 1.5, 2, and 2.5%) and printing temperature (30, 40, 60, and 80 °C). Rheological results from a controlled-stress rheometer indicated that gels derived from G. corneum and G. gracilis exhibited a lower gel strength (lower G' and G″) and excessive material spreading during deposition (lower viscosity) than C. crispus. Thus, G' was around 5 and 70 times higher for C. crispus gels than for G. corneum and G. gracilis, respectively. When increasing LBG concentration (0.5 to 2.5% w/w) and lowering the printing temperature (80 to 30 °C), an enhanced gel matrix definition for G. corneum and G. gracilis gels was found. In contrast, gels from C. crispus demonstrated greater stability and were less influenced by these parameters, showcasing the potential of the seaweed to develop sustainable clean label food gels. Eventually, these results highlight the feasibility of using algal-based extracts obtained through a green procedure as bioinks where LBG was employed as a synergic ingredient.
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Affiliation(s)
- Sónia Oliveira
- LEAF-Linking Landscape, Environment, Agriculture and Food-Research Center, Associated Laboratory TERRA, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017 Lisboa, Portugal
| | - Isabel Sousa
- LEAF-Linking Landscape, Environment, Agriculture and Food-Research Center, Associated Laboratory TERRA, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017 Lisboa, Portugal
| | - Anabela Raymundo
- LEAF-Linking Landscape, Environment, Agriculture and Food-Research Center, Associated Laboratory TERRA, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017 Lisboa, Portugal
| | - Carlos Bengoechea
- Departamento de Ingeniería Química, Escuela Politécnica Superior, Universidad de Sevilla, 41012 Sevilla, Spain
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Effects of Lactobacillus fermentation on Eucheuma spinosum polysaccharides: Characterization and mast cell membrane stabilizing activity. Carbohydr Polym 2023; 310:120742. [PMID: 36925257 DOI: 10.1016/j.carbpol.2023.120742] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 02/16/2023] [Accepted: 02/21/2023] [Indexed: 02/27/2023]
Abstract
Eucheuma polysaccharides have varieties of biological activities. However, it is accompanied by problems like large molecular weight, high viscosity, and low utilization. Here, we first prepared fermented Eucheuma spinosum polysaccharides (F-ESP) by Lactobacillus fermentation, compared with low-temperature freeze-thaw ESP (L-ESP) prepared by the freeze-thaw method, explored the composition and structural characteristics of F-ESP and L-ESP, and evaluation of the ability of different samples to inhibit mast cell degranulation using classical mast cell model. Then, the activity of L-ESP and F-ESP in vivo was preliminarily evaluated using a passive cutaneous anaphylaxis model. Two kinds of F-ESP named F1-ESP-3 and F2-ESP-3 were obtained by fermentation of Eucheuma spinosum with the selected strains of Lactobacillus.sakei subsp.sakei and Lactobacillus.rhamnosus. Compared with the purified component L-ESP-3, the monosaccharide composition of F1-ESP-3 contains more glucuronic acid, the molecular weight reduced from >600 kDa (L-ESP-3) to 28.30 kDa (F1-ESP-3) and 33.58 kDa (F2-ESP-3), F1-ESP-3 has higher solubility and lower apparent viscosity. Fermentation did not destroy the functional groups and structure of ESP. Moreover, F1-ESP-3 significantly inhibited RBL-2H3 cell degranulation by reducing depolymerization of F-actin and Ca2+ influx. F1-ESP-3 reduced the symptoms of mast cell-mediated passive cutaneous anaphylaxis, indicating that F1-ESP-3 may have better anti-allergic activity in vivo.
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Murphy EJ, Fehrenbach GW, Abidin IZ, Buckley C, Montgomery T, Pogue R, Murray P, Major I, Rezoagli E. Polysaccharides-Naturally Occurring Immune Modulators. Polymers (Basel) 2023; 15:polym15102373. [PMID: 37242947 DOI: 10.3390/polym15102373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 05/06/2023] [Accepted: 05/07/2023] [Indexed: 05/28/2023] Open
Abstract
The prevention of disease and infection requires immune systems that operate effectively. This is accomplished by the elimination of infections and abnormal cells. Immune or biological therapy treats disease by either stimulating or inhibiting the immune system, dependent upon the circumstances. In plants, animals, and microbes, polysaccharides are abundant biomacromolecules. Due to the intricacy of their structure, polysaccharides may interact with and impact the immune response; hence, they play a crucial role in the treatment of several human illnesses. There is an urgent need for the identification of natural biomolecules that may prevent infection and treat chronic disease. This article addresses some of the naturally occurring polysaccharides of known therapeutic potential that have already been identified. This article also discusses extraction methods and immunological modulatory capabilities.
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Affiliation(s)
- Emma J Murphy
- Shannon Applied Biotechnology Centre, Midwest Campus, Technological University of the Shannon, V94EC5T Limerick, Ireland
- LIFE-Health and Biosciences Research Institute, Midwest Campus, Technological University of the Shannon, V94EC5T Limerick, Ireland
- PRISM, Research Institute, Midlands Campus, Technological University of the Shannon, N37 HD68 Athlone, Ireland
| | - Gustavo Waltzer Fehrenbach
- PRISM, Research Institute, Midlands Campus, Technological University of the Shannon, N37 HD68 Athlone, Ireland
- Applied Polymer Technologies, Midlands Campus, Technological University of the Shannon, N37 HD68 Athlone, Ireland
| | - Ismin Zainol Abidin
- PRISM, Research Institute, Midlands Campus, Technological University of the Shannon, N37 HD68 Athlone, Ireland
- Applied Polymer Technologies, Midlands Campus, Technological University of the Shannon, N37 HD68 Athlone, Ireland
| | - Ciara Buckley
- PRISM, Research Institute, Midlands Campus, Technological University of the Shannon, N37 HD68 Athlone, Ireland
- Applied Polymer Technologies, Midlands Campus, Technological University of the Shannon, N37 HD68 Athlone, Ireland
| | - Therese Montgomery
- School of Science and Computing, Atlantic Technological University, H91 T8NW Galway, Ireland
| | - Robert Pogue
- Universidade Católica de Brasilia, QS 7 LOTE 1-Taguatinga, Brasília 71680-613, DF, Brazil
| | - Patrick Murray
- Shannon Applied Biotechnology Centre, Midwest Campus, Technological University of the Shannon, V94EC5T Limerick, Ireland
- LIFE-Health and Biosciences Research Institute, Midwest Campus, Technological University of the Shannon, V94EC5T Limerick, Ireland
| | - Ian Major
- PRISM, Research Institute, Midlands Campus, Technological University of the Shannon, N37 HD68 Athlone, Ireland
- Applied Polymer Technologies, Midlands Campus, Technological University of the Shannon, N37 HD68 Athlone, Ireland
| | - Emanuele Rezoagli
- Department of Emergency and Intensive Care, Fondazione IRCCS San Gerardo dei Tintori, 20900 Monza, Italy
- School of Medicine and Surgery, University of Milano-Bicocca, 20900 Monza, Italy
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Development of a novel agar extraction method using calcium hydroxide and carbon dioxide. ALGAL RES 2022. [DOI: 10.1016/j.algal.2022.102933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Jiang F, Liu Y, Xiao Q, Chen F, Weng H, Chen J, Zhang Y, Xiao A. Eco-Friendly Extraction, Structure, and Gel Properties of ι-Carrageenan Extracted Using Ca(OH)2. Mar Drugs 2022; 20:md20070419. [PMID: 35877712 PMCID: PMC9322172 DOI: 10.3390/md20070419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 06/25/2022] [Accepted: 06/25/2022] [Indexed: 11/16/2022] Open
Abstract
An eco-friendly method for ι-carrageenan extraction from seaweed Eucheuma denticulatum through boiling and using a low concentration of Ca(OH)2 is reported. Compared to the traditional method of ι-carrageenan extraction using NaOH, the reported method using Ca(OH)2 had the advantages of using 93.3% less alkali and 86.8% less water, having a 25.0% shorter total extraction time, a 17.6% higher yield, and a 43.3% higher gel strength of the product. In addition, we evaluated the gel properties and structures of ι-carrageenan products extracted by Ca(OH)2 (Ca-IC) and NaOH (Na-IC). The Fourier transform infrared spectroscopy results showed that the structures of Ca-IC and Na-IC did not change remarkably. The results of the thermogravimetric analysis and differential scanning calorimetry showed that Ca-IC had the same thermal stability as Na-IC. The results of the textural analysis showed that Ca-IC had a higher hardness and better chewiness compared to Na-IC. Rheological results indicated that Ca-IC and Na-IC exhibited shear-thinning and non-Newtonian fluid properties, whereas the viscosity of Ca-IC was less than that of Na-IC. In conclusion, this new method of ι-carrageenan extraction using Ca-IC is markedly better and yields higher quality carrageenan than the conventional method of using Na-IC.
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Affiliation(s)
- Feng Jiang
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, China; (F.J.); (Y.L.); (Q.X.); (F.C.); (H.W.); (J.C.)
- National R&D Center for Red Alga Processing Technology, Xiamen 361021, China
- Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
| | - Yao Liu
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, China; (F.J.); (Y.L.); (Q.X.); (F.C.); (H.W.); (J.C.)
- National R&D Center for Red Alga Processing Technology, Xiamen 361021, China
- Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
| | - Qiong Xiao
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, China; (F.J.); (Y.L.); (Q.X.); (F.C.); (H.W.); (J.C.)
- National R&D Center for Red Alga Processing Technology, Xiamen 361021, China
- Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
- Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
| | - Fuquan Chen
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, China; (F.J.); (Y.L.); (Q.X.); (F.C.); (H.W.); (J.C.)
- National R&D Center for Red Alga Processing Technology, Xiamen 361021, China
- Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
- Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
| | - Huifen Weng
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, China; (F.J.); (Y.L.); (Q.X.); (F.C.); (H.W.); (J.C.)
- National R&D Center for Red Alga Processing Technology, Xiamen 361021, China
- Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
- Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
| | - Jun Chen
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, China; (F.J.); (Y.L.); (Q.X.); (F.C.); (H.W.); (J.C.)
- National R&D Center for Red Alga Processing Technology, Xiamen 361021, China
- Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
- Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
| | - Yonghui Zhang
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, China; (F.J.); (Y.L.); (Q.X.); (F.C.); (H.W.); (J.C.)
- National R&D Center for Red Alga Processing Technology, Xiamen 361021, China
- Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
- Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
- Correspondence: (Y.Z.); (A.X.); Tel.: +86-592-6181487 (Y.Z.); +86-592-6180075 (A.X.)
| | - Anfeng Xiao
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, China; (F.J.); (Y.L.); (Q.X.); (F.C.); (H.W.); (J.C.)
- National R&D Center for Red Alga Processing Technology, Xiamen 361021, China
- Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, China
- Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
- Correspondence: (Y.Z.); (A.X.); Tel.: +86-592-6181487 (Y.Z.); +86-592-6180075 (A.X.)
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