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Gavril Rațu RN, Stoica F, Lipșa FD, Constantin OE, Stănciuc N, Aprodu I, Râpeanu G. Pumpkin and Pumpkin By-Products: A Comprehensive Overview of Phytochemicals, Extraction, Health Benefits, and Food Applications. Foods 2024; 13:2694. [PMID: 39272458 PMCID: PMC11395535 DOI: 10.3390/foods13172694] [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: 07/26/2024] [Revised: 08/21/2024] [Accepted: 08/25/2024] [Indexed: 09/15/2024] Open
Abstract
A versatile and popular Cucurbitaceous vegetable, pumpkin has recently gained much attention because of its variety of phytochemicals and health advantages. Pumpkins are a type of winter squash, traditionally with large, spherical, orange fruits and a highly nutrient food. Pumpkin by-products comprise various parts, such as seeds, peels, and pulp residues, with their bioactive composition and many potential benefits poorly explored by the food industry. Pumpkin and their by-products contain a wide range of phytochemicals, including carotenoids, polyphenols, tocopherols, vitamins, minerals, and dietary fibers. These compounds in pumpkin by-products exhibit antioxidant, anticancer, anti-inflammatory, anti-diabetic, and antimicrobial properties and could reduce the risk of chronic diseases. This comprehensive review aims to provide a detailed overview of the phytochemicals found in pumpkin and its by-products, along with their extraction methods, health benefits, and diverse food and industrial applications. This information can offer valuable insights for food scientists seeking to reevaluate pumpkin's potential as a functional ingredient. Reusing these by-products would support integrating a circular economy approach by boosting the market presence of valuable and sustainable products that improve health while lowering food waste.
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Affiliation(s)
- Roxana Nicoleta Gavril Rațu
- Department of Food Technologies, Faculty of Agriculture, "Ion Ionescu de la Brad" Iasi University of Life Sciences, 3 Mihail Sadoveanu Alley, 700489 Iasi, Romania
- Department of Food Science, Food Engineering, Biotechnology and Aquaculture, Faculty of Food Science and Engineering, Dunărea de Jos University of Galati, 800201 Galați, Romania
| | - Florina Stoica
- Department of Pedotechnics, Faculty of Agriculture, Iasi University of Life Sciences, 3 Mihail Sadoveanu Alley, 700489 Iasi, Romania
| | - Florin Daniel Lipșa
- Department of Food Technologies, Faculty of Agriculture, "Ion Ionescu de la Brad" Iasi University of Life Sciences, 3 Mihail Sadoveanu Alley, 700489 Iasi, Romania
| | - Oana Emilia Constantin
- Department of Food Science, Food Engineering, Biotechnology and Aquaculture, Faculty of Food Science and Engineering, Dunărea de Jos University of Galati, 800201 Galați, Romania
| | - Nicoleta Stănciuc
- Department of Food Science, Food Engineering, Biotechnology and Aquaculture, Faculty of Food Science and Engineering, Dunărea de Jos University of Galati, 800201 Galați, Romania
| | - Iuliana Aprodu
- Department of Food Science, Food Engineering, Biotechnology and Aquaculture, Faculty of Food Science and Engineering, Dunărea de Jos University of Galati, 800201 Galați, Romania
| | - Gabriela Râpeanu
- Department of Food Science, Food Engineering, Biotechnology and Aquaculture, Faculty of Food Science and Engineering, Dunărea de Jos University of Galati, 800201 Galați, Romania
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Pinna N, Ianni F, Selvaggini R, Urbani S, Codini M, Grispoldi L, Cenci-Goga BT, Cossignani L, Blasi F. Valorization of Pumpkin Byproducts: Antioxidant Activity and Carotenoid Characterization of Extracts from Peel and Filaments. Foods 2023; 12:4035. [PMID: 37959154 PMCID: PMC10650554 DOI: 10.3390/foods12214035] [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: 10/05/2023] [Revised: 10/31/2023] [Accepted: 11/02/2023] [Indexed: 11/15/2023] Open
Abstract
Pumpkin (Cucurbita sp.) represents an unquestionable source of valuable nutrients and bioactive compounds having a broad spectrum of health-promoting effects. The goal of this work was to characterize the byproducts (peels and filaments) of different pumpkin varieties belonging to C. moschata (Butternut, Lunga di Napoli, Moscata di Provenza, and Violina rugosa) and C. maxima (Delica, Delica vanity, Hokkaido, and Mantovana) species in terms of total carotenoid content, antioxidant activity, and carotenoid profiling. The research revealed that peels and filaments were a good source of β-carotene and other non-esterified carotenoids, as well as esterified carotenoids. Considering the growing market demand for safe and healthy food products, pumpkin byproducts, having also an interesting antioxidant bioactivity, could be useful in the development of novel functional products.
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Affiliation(s)
- Nicola Pinna
- Department of Pharmaceutical Sciences, University of Perugia, 06126 Perugia, Italy; (N.P.); (F.I.); (M.C.); (F.B.)
| | - Federica Ianni
- Department of Pharmaceutical Sciences, University of Perugia, 06126 Perugia, Italy; (N.P.); (F.I.); (M.C.); (F.B.)
| | - Roberto Selvaggini
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, 06126 Perugia, Italy; (R.S.)
| | - Stefania Urbani
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, 06126 Perugia, Italy; (R.S.)
| | - Michela Codini
- Department of Pharmaceutical Sciences, University of Perugia, 06126 Perugia, Italy; (N.P.); (F.I.); (M.C.); (F.B.)
| | - Luca Grispoldi
- Department of Veterinary Medicine, University of Perugia, 06126 Perugia, Italy; (L.G.); (B.T.C.-G.)
| | | | - Lina Cossignani
- Department of Pharmaceutical Sciences, University of Perugia, 06126 Perugia, Italy; (N.P.); (F.I.); (M.C.); (F.B.)
| | - Francesca Blasi
- Department of Pharmaceutical Sciences, University of Perugia, 06126 Perugia, Italy; (N.P.); (F.I.); (M.C.); (F.B.)
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Konrade D, Gaidukovs S, Vilaplana F, Sivan P. Pectin from Fruit- and Berry-Juice Production by-Products: Determination of Physicochemical, Antioxidant and Rheological Properties. Foods 2023; 12:foods12081615. [PMID: 37107409 PMCID: PMC10137805 DOI: 10.3390/foods12081615] [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: 02/10/2023] [Revised: 03/26/2023] [Accepted: 04/04/2023] [Indexed: 04/29/2023] Open
Abstract
Plums (Prunus domestica); red currants (Ribes rubrum); black currants (Ribes nigrum); gooseberries (Ribes uva-crispa); sour cherries (Prunus cerasus); pumpkins (Cuccurbita spp.) are sources for valuable fruit- and berry-juice and cider production. This process leaves a large number of by-products (BP) in the form of pomace, which accounts for up to 80% of the raw material. This by-product represents a rich source of biologically active compounds, especially in the form of different pectic polysaccharides. The pectin extracted from commercial fruits such as citric fruits and apples has high medicinal properties, can be used as edible films and coatings, and is also useful in texture improvement and gel production in the food industry. However, many under-utilized fruits have received little attention regarding the extraction and characterization of their high/value pectin from their by-products. Moreover, the commercial extraction process involving strong acids and high temperature to obtain high-purity pectin leads to the loss of many bioactive components, and these lost components are often compensated for by the addition of synthetic antioxidants and colorants. The aim of the research is to extract pectin from juice production by-products with hot-water extraction using weak organic (0.1 N) citric acid, thus minimizing the impact on the environment. The yield of pectin (PY = 4.47-17.8% DM), galacturonic acid content (47.22-83.57 g 100-1), ash content (1.42-2.88 g 100 g-1), degree of esterification (DE = 45.16-64.06%), methoxyl content (ME = 4.27-8.13%), the total content of phenolic compounds (TPC = 2.076-4.668 µg mg-1, GAE) and the antiradical scavenging activity of the pectin samples (DPPH method (0.56-37.29%)) were determined. Free and total phenolic acids were quantified by saponification using high-pressure liquid chromatography (HPLC). The pectin contained phenolic acids-benzoic (0.25-0.92 µg mg-1), gallic (0.14-0.57 µg mg-1), coumaric (0.04 µg mg-1), and caffeic (0.03 µg mg-1). The pectin extracts from by-products showed glucose and galactose (3.89-21.72 g 100 g-1) as the main neutral sugar monosaccharides. Pectin analysis was performed using FT-IR, and the rheological properties of the pectin gels were determined. The quality of the obtained pectin from the fruit and berry by-products in terms of their high biological activity and high content of glucuronic acids indicated that the products have the potential to be used as natural ingredients in various food products and in pharmaceutical products.
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Affiliation(s)
- Daiga Konrade
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena Str. 3/7, LV-1048 Riga, Latvia
| | - Sergejs Gaidukovs
- Latvia Institute of Polymer Materials, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena Str. 3/7, LV-1048 Riga, Latvia
| | - Francisco Vilaplana
- Department of Chemistry, Division of Glycoscience, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Pramod Sivan
- Department of Chemistry, Division of Glycoscience, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
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Leichtweis MG, Molina AK, Petropoulos SA, Carocho M, Pires TCSP, Dias MI, Calhelha R, Oliveira MBPP, Pereira C, Barros L. Valorization of Pumpkin Peel as a Source of Bioactive Compounds: Optimization of Heat- and Ultrasound-Assisted Extraction. Molecules 2023; 28:molecules28073168. [PMID: 37049931 PMCID: PMC10096157 DOI: 10.3390/molecules28073168] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 03/24/2023] [Accepted: 03/30/2023] [Indexed: 04/05/2023] Open
Abstract
The peels from three pumpkin genotypes cultivated in Greece were assessed for their phenolic content and bioactive properties to obtain extracts with a high preservative capacity. The optimization of the extraction was performed through response surface methodology (RSM) based on a Box–Behnken experimental design after applying two extraction techniques: heat-assisted (HAE) and ultrasound-assisted (UAE) extraction. The implemented independent variables were time, solvent concentration, and temperature/power (for HAE/UAE), while as dependent variables the dry residue (DR), reducing power (RP), and total phenolic content (TP) were considered. In general, HAE was the most effective technique for ‘TL’ (75 min; 30 °C; 24% ethanol) and ‘Voutirato’ (15 min; 30 °C; 10% ethanol), while UAE was more effective for ‘Leuka Melitis’ (5 min; 400 W; 0% ethanol). The extracts obtained in the global optimum conditions for each genotype peel were then assessed for their phenolic profile, by HPLC-DAD-ESI/MS, and bioactive potential. Seven phenolic compounds were detected, including four flavonoids, two phenolic acids, and one flavan-3-ol. The extracts presented high antioxidant, antibacterial, and antifungal potential, with no cytotoxicity for non-tumor cells. The optimized conditions for the extraction of preservative compounds from bioresidues were defined, allowing the acquisition of antioxidant and antimicrobial extracts and proving their potential for food application.
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Affiliation(s)
- Maria G. Leichtweis
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
- Laboratório Associado para a Sustentabilidade e Tecnologia em Regiões de Montanha (SusTEC), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
- Department of Agriculture Crop Production and Rural Environment, University of Thessaly, 38446 Volos, Greece
| | - Adriana K. Molina
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
- Laboratório Associado para a Sustentabilidade e Tecnologia em Regiões de Montanha (SusTEC), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
| | - Spyridon A. Petropoulos
- Department of Agriculture Crop Production and Rural Environment, University of Thessaly, 38446 Volos, Greece
| | - Márcio Carocho
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
- Laboratório Associado para a Sustentabilidade e Tecnologia em Regiões de Montanha (SusTEC), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
| | - Tânia C. S. P. Pires
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
- Laboratório Associado para a Sustentabilidade e Tecnologia em Regiões de Montanha (SusTEC), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
| | - Maria Inês Dias
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
- Laboratório Associado para a Sustentabilidade e Tecnologia em Regiões de Montanha (SusTEC), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
| | - Ricardo Calhelha
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
- Laboratório Associado para a Sustentabilidade e Tecnologia em Regiões de Montanha (SusTEC), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
| | - M. Beatriz P. P. Oliveira
- REQUIMTE—Science Chemical Department, Faculty of Pharmacy, University of Porto, Rua Jorge Viterbo Ferreira no. 228, 4050-313 Porto, Portugal
| | - Carla Pereira
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
- Laboratório Associado para a Sustentabilidade e Tecnologia em Regiões de Montanha (SusTEC), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
| | - Lillian Barros
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
- Laboratório Associado para a Sustentabilidade e Tecnologia em Regiões de Montanha (SusTEC), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
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Ortiz-Viedma J, Bastias-Montes JM, Char C, Vega C, Quintriqueo A, Gallón-Bedoya M, Flores M, Aguilera JM, Miranda JM, Barros-Velázquez J. Sequential Biorefining of Bioactive Compounds of High Functional Value from Calafate Pomace ( Berberis microphylla) Using Supercritical CO 2 and Pressurized Liquids. Antioxidants (Basel) 2023; 12:antiox12020323. [PMID: 36829882 PMCID: PMC9952607 DOI: 10.3390/antiox12020323] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/12/2023] [Accepted: 01/24/2023] [Indexed: 01/31/2023] Open
Abstract
A biorefinery process was developed for a freeze-dried pomace of calafate berries (Berberis microphylla). The process consisted of extraction of lipophilic components with supercritical CO2 (scCO2) and subsequent extraction of the residue with a pressurized mixture of ethanol/water (1:1 v/v). scCO2 extracted oil from the pomace, while pressurized liquid extraction generated a crude extract rich in phenols and a residue rich in fiber, proteins and minerals. Response surface analysis of scCO2 extraction suggested optimal conditions of 60 °C, 358.5 bar and 144.6 min to obtain a lipid extract yield of 11.15% (d.w.). The dark yellow oil extract contained a good ratio of ω6/ω3 fatty acids (1:1.2), provitamin E tocopherols (406.6 mg/kg), and a peroxide index of 8.6 meq O2/kg. Pressurized liquid extraction generated a polar extract with good phenolic content (33 mg gallic acid equivalents /g d.w.), anthocyanins (8 mg/g) and antioxidant capacity (2,2-diphenyl-1-picrylhydrazyl test = 25 µg/mL and antioxidant activity = 63 µM Te/g). The extraction kinetics of oil by scCO2 and phenolic compounds were optimally adjusted to the spline model (R2 = 0.989 and R2 = 0.999, respectively). The solid extracted residue presented a fiber content close to cereals (56.4% d.w.) and acceptable values of proteins (29.6% d.w.) and minerals (14.1% d.w.). These eco-friendly processes valorize calafate pomace as a source of ingredients for formulation of healthy foods, nutraceuticals and nutritional supplements.
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Affiliation(s)
- Jaime Ortiz-Viedma
- Departamento de Ciencia de los Alimentos y Tecnología Química, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Dr. Carlos Lorca 964, Santiago 8320000, Chile
- Correspondence: (J.O.-V.); (M.F.)
| | - José M. Bastias-Montes
- Departamento de Ingeniería en Alimentos, Universidad del Bio-Bio, Avda Andrés Bello 720, Chillan 3800708, Chile
| | - Cielo Char
- Departamento de Ciencia de los Alimentos y Tecnología Química, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Dr. Carlos Lorca 964, Santiago 8320000, Chile
| | - Camila Vega
- Departamento de Ciencia de los Alimentos y Tecnología Química, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Dr. Carlos Lorca 964, Santiago 8320000, Chile
| | - Alejandra Quintriqueo
- Departamento de Ciencia de los Alimentos y Tecnología Química, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Dr. Carlos Lorca 964, Santiago 8320000, Chile
| | - Manuela Gallón-Bedoya
- Facultad de Ciencias Agrarias, Universidad Nacional de Colombia, Sede Medellín, Medellín 050034, Colombia
| | - Marcos Flores
- Departamento de Ciencias Básicas, Facultad de Ciencias, Universidad Santo Tomás, Talca 3460000, Chile
- Correspondence: (J.O.-V.); (M.F.)
| | - José M. Aguilera
- Departamento de Ingeniería Química y Bioprocesos, Universidad Católica de Chile, V. Mackenna 3860, Santiago 8940000, Chile
| | - José M. Miranda
- Departamento de Química Analítica, Nutrición y Bromatología, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27002 Lugo, Spain
| | - Jorge Barros-Velázquez
- Departamento de Química Analítica, Nutrición y Bromatología, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27002 Lugo, Spain
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The ‘Edge Effect’ Phenomenon in Plants: Morphological, Biochemical and Mineral Characteristics of Border Tissues. DIVERSITY 2023. [DOI: 10.3390/d15010123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The ‘edge’ effect is considered one of the fundamental ecological phenomena essential for maintaining ecosystem integrity. The properties of plant outer tissues (root, tuber, bulb and fruit peel, tree and shrub bark, leaf and stem trichomes) mimic to a great extent the ‘edge’ effect properties of different ecosystems, which suggests the possibility of the ‘edge’ effect being applicable to individual plant organisms. The most important characteristics of plant border tissues are intensive oxidant stress, high variability and biodiversity of protection mechanisms and high adsorption capacity. Wide variations in morphological, biochemical and mineral components of border tissues play an important role in the characteristics of plant adaptability values, storage duration of roots, fruit, tubers and bulbs, and the diversity of outer tissue practical application. The significance of outer tissue antioxidant status and the accumulation of polyphenols, essential oil, lipids and minerals, and the artificial improvement of such accumulation is described in connection with plant tolerance to unfavorable environmental conditions. Methods of plant ‘edge’ effect utilization in agricultural crop breeding, production of specific preparations with powerful antioxidant value and green nanoparticle synthesis of different elements have been developed. Extending the ‘edge’ effect phenomenon from ecosystems to individual organisms is of fundamental importance in agriculture, pharmacology, food industry and wastewater treatment processes.
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Innovative and Sustainable Technologies to Enhance the Oxidative Stability of Vegetable Oils. SUSTAINABILITY 2022. [DOI: 10.3390/su14020849] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
To meet consumers’ demand for natural foods, edible oil producers and food processing industries are searching for alternatives to synthetic antioxidants to protect oils against oxidation. Antioxidant compounds extracted from different plant parts (e.g., flowers, leaves, roots, and seeds) or sourced from agri-food industries, including residues left after food processing, attract consumers for their health properties and natural origins. This review, starting from a literature research analysis, highlights the role of natural antioxidants in the protection of edible oils against oxidation, with an emphasis on the emerging and sustainable strategies to preserve oils against oxidative damage. Sustainability and health are the main concerns of food processing industries. In this context, the aim of this review is to highlight the emerging strategies for the enrichment of edible oils with biomolecules or extracts recovered from plant sources. The use of extracts obtained from vegetable wastes and by-products and the blending with oils extracted from various oil-bearing seeds is also pointed out as a sustainable approach. The safety concerns linked to the use of natural antioxidants for human health are also discussed. This review, using a multidisciplinary approach, provides an updated overview of the chemical, technological, sustainability, and safety aspects linked to oil protection.
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Cheng Y, Xue F, Yu S, Du S, Yang Y. Subcritical Water Extraction of Natural Products. Molecules 2021; 26:4004. [PMID: 34209151 PMCID: PMC8271798 DOI: 10.3390/molecules26134004] [Citation(s) in RCA: 74] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 06/20/2021] [Accepted: 06/20/2021] [Indexed: 12/13/2022] Open
Abstract
Subcritical water refers to high-temperature and high-pressure water. A unique and useful characteristic of subcritical water is that its polarity can be dramatically decreased with increasing temperature. Therefore, subcritical water can behave similar to methanol or ethanol. This makes subcritical water a green extraction fluid used for a variety of organic species. This review focuses on the subcritical water extraction (SBWE) of natural products. The extracted materials include medicinal and seasoning herbs, vegetables, fruits, food by-products, algae, shrubs, tea leaves, grains, and seeds. A wide range of natural products such as alkaloids, carbohydrates, essential oil, flavonoids, glycosides, lignans, organic acids, polyphenolics, quinones, steroids, and terpenes have been extracted using subcritical water. Various SBWE systems and their advantages and drawbacks have also been discussed in this review. In addition, we have reviewed co-solvents including ethanol, methanol, salts, and ionic liquids used to assist SBWE. Other extraction techniques such as microwave and sonication combined with SBWE are also covered in this review. It is very clear that temperature has the most significant effect on SBWE efficiency, and thus, it can be optimized. The optimal temperature ranges from 130 to 240 °C for extracting the natural products mentioned above. This review can help readers learn more about the SBWE technology, especially for readers with an interest in the field of green extraction of natural products. The major advantage of SBWE of natural products is that water is nontoxic, and therefore, it is more suitable for the extraction of herbs, vegetables, and fruits. Another advantage is that no liquid waste disposal is required after SBWE. Compared with organic solvents, subcritical water not only has advantages in ecology, economy, and safety, but also its density, ion product, and dielectric constant can be adjusted by temperature. These tunable properties allow subcritical water to carry out class selective extractions such as extracting polar compounds at lower temperatures and less polar ingredients at higher temperatures. SBWE can mimic the traditional herbal decoction for preparing herbal medication and with higher extraction efficiency. Since SBWE employs high-temperature and high-pressure, great caution is needed for safe operation. Another challenge for application of SBWE is potential organic degradation under high temperature conditions. We highly recommend conducting analyte stability checks when carrying out SBWE. For analytes with poor SBWE efficiency, a small number of organic modifiers such as ethanol, surfactants, or ionic liquids may be added.
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Affiliation(s)
- Yan Cheng
- School of Pharmaceutical Sciences, Qilu University of Technology (Former Shandong Academy of Sciences), Jinan 250353, China; (Y.C.); (F.X.); (S.Y.); (S.D.)
- Shandong Analysis and Test Centre, Qilu University of Technology (Former Shandong Academy of Sciences), Jinan 250353, China
- Department of Chemistry, East Carolina University, Greenville, NC 27858, USA
| | - Fumin Xue
- School of Pharmaceutical Sciences, Qilu University of Technology (Former Shandong Academy of Sciences), Jinan 250353, China; (Y.C.); (F.X.); (S.Y.); (S.D.)
- Shandong Analysis and Test Centre, Qilu University of Technology (Former Shandong Academy of Sciences), Jinan 250353, China
| | - Shuai Yu
- School of Pharmaceutical Sciences, Qilu University of Technology (Former Shandong Academy of Sciences), Jinan 250353, China; (Y.C.); (F.X.); (S.Y.); (S.D.)
- Shandong Analysis and Test Centre, Qilu University of Technology (Former Shandong Academy of Sciences), Jinan 250353, China
| | - Shichao Du
- School of Pharmaceutical Sciences, Qilu University of Technology (Former Shandong Academy of Sciences), Jinan 250353, China; (Y.C.); (F.X.); (S.Y.); (S.D.)
- Shandong Analysis and Test Centre, Qilu University of Technology (Former Shandong Academy of Sciences), Jinan 250353, China
| | - Yu Yang
- Department of Chemistry, East Carolina University, Greenville, NC 27858, USA
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Sharma M, Bhat R. Extraction of Carotenoids from Pumpkin Peel and Pulp: Comparison between Innovative Green Extraction Technologies (Ultrasonic and Microwave-Assisted Extractions Using Corn Oil). Foods 2021; 10:foods10040787. [PMID: 33917570 PMCID: PMC8067522 DOI: 10.3390/foods10040787] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 03/31/2021] [Accepted: 04/01/2021] [Indexed: 01/18/2023] Open
Abstract
Natural pigments improve aesthetic value as well as antioxidant potential of a food product. This study was designed to determine the effects of green extraction techniques on carotenoids, polyphenols and antioxidant activities of pulp and peel of two varieties of pumpkin (Cucurbita maxima). Innovative green extractions (IGE; Ultrasound and Microwave-Assisted Extractions) synergised with corn oil (used as green solvent) were compared with conventional extraction (CE; hexane/isopropyl alcohol; 60:40, v/v). Results showed total carotenoids to be almost double on employing IGE (PM2-UAE-peel = 38.03 ± 4.21; PM4-UAE-peel = 33.78 ± 1.76 µg/g) when compared to conventional extraction (PM2-CE-peel = 19.21 ± 4.39; PM4-CE-peel = 16.21 ± 2.52 µg/g). Polyphenolic contents ranged between 510.69 ± 5.50 and 588.68 ± 7.26 mg GAE/100 g of extract in IGE, compared with conventional extracts (269.50 ± 2.17 to 318.46 ± 6.60 mg GAE/100 g) and percent inhibition of 2,2-Diphenyl-1-picrylhydrazyl (DPPH) ranging between 88.32 ± 1.51 and 93.53 ± 0.30% in IGE when compared with conventional extraction (50.61 ± 1.44 to 57.79 ± 2.09%). Further, oxidative stability of carotenoids extracts from IGE (protection factor = 1.59 ± 0.01 to 1.81 ± 0.05) were found to be significantly higher (p < 0.05) than conventional extracts. Based on results, this study supports the use of innovative green extraction techniques to obtain bioactive pigments like carotenoids. It is anticipated that results generated will find potential applications in food, pharmaceutical and cosmetic industries.
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Yu G, Zhao J, Wei Y, Huang L, Li F, Zhang Y, Li Q. Physicochemical Properties and Antioxidant Activity of Pumpkin Polysaccharide ( Cucurbita moschata Duchesne ex Poiret) Modified by Subcritical Water. Foods 2021; 10:197. [PMID: 33478048 PMCID: PMC7835828 DOI: 10.3390/foods10010197] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 01/14/2021] [Accepted: 01/15/2021] [Indexed: 12/21/2022] Open
Abstract
In this paper, subcritical water (SCW) was applied to modify pumpkin (Cucurbita moschata Duchesne ex Poiret) polysaccharides, and the properties and antioxidant activity of pumpkin polysaccharides were investigated. SCW treatments at varying temperature led to changes in the rheological and emulsifying properties of pumpkin polysaccharides. SCW treatments efficiently degraded pumpkin polysaccharides and changed the molecular weight distribution. Decreases in intrinsic viscosity, viscosity-average molecular weight, and apparent viscosity were also observed, while the activation energy and flow behavior indices increased. The temperature of SCW treatment has a great influence on the linear viscoelastic properties and antioxidant activity of pumpkin polysaccharides. Pumpkin polysaccharides solution treated by SCW at 150 °C exhibited the highest emulsifying activity and antioxidant activity, which was probably due to a broader molecular mass distribution and more reducing ends exposed after treatment. Scanning electron microscopy showed that SCW treatment changed the microstructure of pumpkin polysaccharides, resulting in the exposure of bigger surface area. Our results suggest that SCW treatment is an effective approach to modify pumpkin polysaccharides to achieve improved solution properties and antioxidant activity.
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Affiliation(s)
- Guoyong Yu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (G.Y.); (J.Z.); (Y.W.); (L.H.); (F.L.); (Y.Z.)
- National Engineering Research Center for Fruit and Vegetable Processing, Beijing 100083, China
- Key Laboratory of Fruit and Vegetable Processing, Ministry of Agriculture, Beijing 100083, China
- Beijing Key Laboratory for Food Non-Thermal Processing, Beijing 100083, China
| | - Jing Zhao
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (G.Y.); (J.Z.); (Y.W.); (L.H.); (F.L.); (Y.Z.)
- National Engineering Research Center for Fruit and Vegetable Processing, Beijing 100083, China
- Key Laboratory of Fruit and Vegetable Processing, Ministry of Agriculture, Beijing 100083, China
- Beijing Key Laboratory for Food Non-Thermal Processing, Beijing 100083, China
| | - Yunlu Wei
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (G.Y.); (J.Z.); (Y.W.); (L.H.); (F.L.); (Y.Z.)
- National Engineering Research Center for Fruit and Vegetable Processing, Beijing 100083, China
- Key Laboratory of Fruit and Vegetable Processing, Ministry of Agriculture, Beijing 100083, China
- Beijing Key Laboratory for Food Non-Thermal Processing, Beijing 100083, China
| | - Linlin Huang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (G.Y.); (J.Z.); (Y.W.); (L.H.); (F.L.); (Y.Z.)
- National Engineering Research Center for Fruit and Vegetable Processing, Beijing 100083, China
- Key Laboratory of Fruit and Vegetable Processing, Ministry of Agriculture, Beijing 100083, China
- Beijing Key Laboratory for Food Non-Thermal Processing, Beijing 100083, China
| | - Fei Li
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (G.Y.); (J.Z.); (Y.W.); (L.H.); (F.L.); (Y.Z.)
- National Engineering Research Center for Fruit and Vegetable Processing, Beijing 100083, China
- Key Laboratory of Fruit and Vegetable Processing, Ministry of Agriculture, Beijing 100083, China
- Beijing Key Laboratory for Food Non-Thermal Processing, Beijing 100083, China
| | - Yu Zhang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (G.Y.); (J.Z.); (Y.W.); (L.H.); (F.L.); (Y.Z.)
- National Engineering Research Center for Fruit and Vegetable Processing, Beijing 100083, China
- Key Laboratory of Fruit and Vegetable Processing, Ministry of Agriculture, Beijing 100083, China
- Beijing Key Laboratory for Food Non-Thermal Processing, Beijing 100083, China
| | - Quanhong Li
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; (G.Y.); (J.Z.); (Y.W.); (L.H.); (F.L.); (Y.Z.)
- National Engineering Research Center for Fruit and Vegetable Processing, Beijing 100083, China
- Key Laboratory of Fruit and Vegetable Processing, Ministry of Agriculture, Beijing 100083, China
- Beijing Key Laboratory for Food Non-Thermal Processing, Beijing 100083, China
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