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Applied Sciences
Special Issues
Sustainable Reutilization of Agri-Food Byproducts: Bioactive Compounds
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Sustainable Reutilization of Agri-Food Byproducts: Bioactive Compounds

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Food Science and Technology".

Deadline for manuscript submissions: closed (20 December 2023) | Viewed by 4796

Special Issue Editors

Dr. Emmanouil Tsochatzis

E-Mail Website1 Website2
Guest Editor
Department of Food Science, Centre of Innovative Food Research (iFood), Aarhus University, 8200 Aarhus N, Denmark
Interests: analytical chemistry; food contact materials (intentionally added substances (IAS) and non-intentionally added substances (NIAS)); sustainability and recycling of plastics
Special Issues, Collections and Topics in MDPI journals
Dr. Vidal Natalia Prieto

E-Mail Website
Guest Editor
1. Aarhus Institute of Advanced Studies (AIAS), Aarhus University (AU), 8000 Aarhus, Denmark
2. Department of Food Science, Aarhus University (AU), 8000 Aarhus, Denmark
Interests: bioactive compounds; antioxidants; phenolics; food packaging; carbohydrate and lipid chemistry

Special Issue Information

Dear Colleagues,

Non-Communicable Diseases, (NCDs) including diabetes, cancer and cardiovascular diseases, are responsible for almost 70 % of deaths worldwide. Clinical and epidemiological studies have demonstrated the direct relationship between our diet and the incidence of NCDs. This is in part due to the presence of biologically active compounds present in our food. One of the challenges faced by humanity in a growing global population is to meet health-conscious consumers’ demand for nutritious food with health benefits that are sustainably produced and/or processed. The agro-food industry generates large amounts of by-products that contain valuable compounds with bioactivity and functionality with potential applications in the food, nutraceutical and chemical industries. The efficient reincorporation of these by-products will promote the transition towards a more sustainable, healthy and much-needed circular economy in the food industry. In this scenario, this Special Issue focuses on the characterization, identification and evaluation of the bioactive components from the agro-food industry by-products.

Contributions to this issue, both in the form of original research or review articles, cover all aspects of: characterization, extraction and purification of novel bioactive compounds from food by-products, advancements of analytical methods for bioactive compounds evaluation, and the technological and processing influence in bioactive compounds preservation.

Dr. Emmanouil Tsochatzis
Dr. Vidal Natalia Prieto
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • agri-food byproducts
  • bioactive compounds
  • sustainable extraction
  • food processing
  • functional foods and ingredients
  • bioactive packaging

Published Papers (3 papers)

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Research

11 pages, 1151 KiB  
Article
Characterization of Six Cold-Pressed Berry Seed Oils and Their Seed Meals
by Marina De Filette, Kris Schatteman and Jeroen Geuens
Appl. Sci. 2024, 14(1), 439; https://doi.org/10.3390/app14010439 - 03 Jan 2024
Viewed by 807
Abstract
When producing fruit juices, the pomace, containing the seeds, is left as a byproduct. In this study, cold-pressed blackcurrant, raspberry, blackberry, blueberry, strawberry, and sea buckthorn seed oils and their seed meals were characterized to explore possible commercial applications. The fatty acid (FA) [...] Read more.
When producing fruit juices, the pomace, containing the seeds, is left as a byproduct. In this study, cold-pressed blackcurrant, raspberry, blackberry, blueberry, strawberry, and sea buckthorn seed oils and their seed meals were characterized to explore possible commercial applications. The fatty acid (FA) composition, sterol content, tocopherol content, total polyphenolic content (TP), color, ferric reducing antioxidant power (FRAP), and free-radical scavenging capacity (DPPH assay) were determined. The levels of TP ranged from 8.9 to 19.3 mg GAE/100 g of oil with the highest TP content observed in blackcurrant oil. Concerning the antioxidative activity, sea buckthorn oil and blackberry oil performed best, both exhibiting high FRAP and DPPH scavenging activities. The fatty acid profiles of all oils showed that the main polyunsaturated fatty acids were linoleic acid (C18:2) and α-linolenic acid (C18:3). When studying the sterol and tocopherol content, the highest total amount of sterols (4500 mg/kg) as well as the highest total amount of tocopherols (1036 mg/kg) were observed in blackberry oil. It can be concluded that the cold-pressed berry seed oils examined in this study exhibit interesting characteristics for further commercialization. Moreover, the seed meal is a valuable byproduct that contains high amounts of polyphenols and has a high level of antioxidant activity. Full article
(This article belongs to the Special Issue Sustainable Reutilization of Agri-Food Byproducts: Bioactive Compounds)
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11 pages, 2499 KiB  
Article
Valorization of Cassava By-Products: Cyanide Content and Quality Characteristics of Leaves and Peel
by Adnan Mukhtar, Sajid Latif, Ziba Barati and Joachim Müller
Appl. Sci. 2023, 13(10), 6340; https://doi.org/10.3390/app13106340 - 22 May 2023
Viewed by 1551
Abstract
Cassava production generates significant amounts of by-products such as leaves and tuber peel. Instead of considering them as waste, valorization aims to find sustainable ways to utilize them. However, the presence of cyanide and insoluble fibers poses a major obstacle to their conversion [...] Read more.
Cassava production generates significant amounts of by-products such as leaves and tuber peel. Instead of considering them as waste, valorization aims to find sustainable ways to utilize them. However, the presence of cyanide and insoluble fibers poses a major obstacle to their conversion into valuable products. Therefore, the objective of this study is to investigate the changes in cyanide concentration and quality of cassava leaves after mechanical pressing and in tuber peel after treatment with an enzyme solution. Frozen leaves were screw-pressed into their fractions: juice, and press cake. The results show that the cyanide level in the press cake was reduced to 73.56% and was concentrated by 97.48% in the juice compared to the frozen leaves. However, the crude protein values of the frozen leaves, juice, and press cake did not differ significantly (p > 0.05), and were 27.09%, 25.47%, and 23.82%, respectively. In addition, the results for the peel revealed that pretreatment with Viscozyme® L, which assists in the mechanical peeling of cassava tubers, also contributed to a reduction in cyanide and insoluble fiber in the peel. Cyanide content was lowered by 53.89–58.94% in enzyme-treated peel from all three runs (ETP1-3) when compared to fresh peel (FP), while the reduction was only 8.63% in the control peel (CP) treated with hot water without enzyme solution. The insoluble fibers in cassava peel, such as neutral detergent fiber (NDF), acid detergent fiber (ADF), acid detergent lignin (ADL), and crude fiber (CF), were also degraded more effectively after treatment with an enzyme solution than with hot water. Full article
(This article belongs to the Special Issue Sustainable Reutilization of Agri-Food Byproducts: Bioactive Compounds)
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13 pages, 3856 KiB  
Article
Concentrations of Beetroot (Beta vulgaris L.) Peel and Flesh Extracts by Reverse Osmosis Membrane
by Moh Moh Zin, Areej Alsobh, Arijit Nath, Attila Csighy and Szilvia Bánvölgyi
Appl. Sci. 2022, 12(13), 6360; https://doi.org/10.3390/app12136360 - 22 Jun 2022
Cited by 4 | Viewed by 1863
Abstract
The objective of this investigation was to concentrate betalains, phenolics, and antioxidants from the extract of peel and flesh of beetroot (Beta vulgaris L.). Thin-film composite reverse osmosis (RO) membrane composed of the thick polyamide barrier layer, microporous polysulfone interlayer, and polyester [...] Read more.
The objective of this investigation was to concentrate betalains, phenolics, and antioxidants from the extract of peel and flesh of beetroot (Beta vulgaris L.). Thin-film composite reverse osmosis (RO) membrane composed of the thick polyamide barrier layer, microporous polysulfone interlayer, and polyester support web was used in membrane module. In a later exercise, thermo-instability of betalain color compounds was investigated with different temperatures. After the filtration of the aqueous extract of flesh, betacyanins, betaxanthins, and total betalains were increased by 5.2, 6.1, and 5.5 times, respectively. Likewise, the mentioned bioactive compounds were increased by 3.7, 4.9, and 4.2 times after filtration of the aqueous extract of peel. The amounts of total betalains measured in the final flesh extract were two times lower (14.33 ± 0.15 mg·g−1 dm) compared to the peel concentrate (30.02 ± 0.28 mg·g−1 dm). The superior amount of phenolic was shown in the final flesh extract (34.47 ± 0.19 mg GAE·g−1 dm) compared to peel extract (12.74 ± 0.42 mg GAE·g−1 dm). The antioxidant activity in final beetroot peel extract and flesh extract were 24.65 ± 1.42 mg ASE·g−1 dm and 11.6 ± 0.1 mg ASE·g−1 dm, respectively. The recovery of thermo-sensitive bio-colorants was achieved by membrane filtration with the least thermal degradation. Full article
(This article belongs to the Special Issue Sustainable Reutilization of Agri-Food Byproducts: Bioactive Compounds)
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