scholarly journals Synthesis of Lipophilic Esters of Tyrosol, Homovanillyl Alcohol and Hydroxytyrosol

Antioxidants ◽  
2019 ◽  
Vol 8 (6) ◽  
pp. 174 ◽  
Author(s):  
Roberta Bernini ◽  
Isabella Carastro ◽  
Francesca Santoni ◽  
Mariangela Clemente
Keyword(s):  
Circular Economy ◽  
Room Temperature ◽  
Dimethyl Carbonate ◽  
Low Cost ◽  
Aqueous Media ◽  
Low Molecular Weight ◽  
Health Promoting ◽  
Hydrophilic Character ◽  
Valuable Compounds ◽  
By Products

Low-molecular weight phenols such as tyrosol, homovanillyl alcohol and hydroxytyrosol are valuable compounds that exhibit a high number of health-promoting effects such as antioxidant, anti-inflammatory and anticancer activity. Despite these remarkable properties, their applications such as dietary supplements and stabilizers of foods and cosmetics in non-aqueous media are limited for the hydrophilic character. With the aim to overcome this limitation, the paper describes a simple and low-cost procedure for the synthesis of lipophilic esters of tyrosol, homovanillyl alcohol and hydroxytyrosol. The reactions were carried out under mild and green chemistry conditions, at room temperature, solubilizing the phenolic compounds in dimethyl carbonate, an eco-friendly solvent, and adding a little excess of the appropriate C2–C18 acyl chloride. The final products were isolated in good yields. Finally, according to the “circular economy” strategy, the procedure was applied to hydroxytyrosol-enriched extracts obtained by Olea europaea by-products to prepare a panel of lipophilic extracts that are useful for applications where solubility in lipid media is required.

scholarly journals Monomers, Materials and Energy from Coffee By-Products: A Review

2021 ◽  
Vol 13 (12) ◽  
pp. 6921
Author(s):  
Laura Sisti ◽  
Annamaria Celli ◽  
Grazia Totaro ◽  
Patrizia Cinelli ◽  
Francesca Signori ◽  
...  
Keyword(s):  
Circular Economy ◽  
Food Industry ◽  
Food Packaging ◽  
Low Cost ◽  
Biofuel Production ◽  
Material Technology ◽  
Coffee Production ◽  
Coffee Pulp ◽  
Coffee Waste ◽  
By Products

In recent years, the circular economy and sustainability have gained attention in the food industry aimed at recycling food industrial waste and residues. For example, several plant-based materials are nowadays used in packaging and biofuel production. Among them, by-products and waste from coffee processing constitute a largely available, low cost, good quality resource. Coffee production includes many steps, in which by-products are generated including coffee pulp, coffee husks, silver skin and spent coffee. This review aims to analyze the reasons why coffee waste can be considered as a valuable source in recycling strategies for the sustainable production of bio-based chemicals, materials and fuels. It addresses the most recent advances in monomer, polymer and plastic filler productions and applications based on the development of viable biorefinery technologies. The exploration of strategies to unlock the potential of this biomass for fuel productions is also revised. Coffee by-products valorization is a clear example of waste biorefinery. Future applications in areas such as biomedicine, food packaging and material technology should be taken into consideration. However, further efforts in techno-economic analysis and the assessment of the feasibility of valorization processes on an industrial scale are needed.

scholarly journals High Yields of Shrimp Oil Rich in Omega-3 and Carotenoids: Extending to Shrimp Waste the Circular Economy Approach to Fish Oil Extraction

2020 ◽  
Author(s):  
Antonino Scurria ◽  
Anne-Sylvie Fabiano Tixier ◽  
Claudia Lino ◽  
Mario Pagliaro ◽  
Fabio D’Agostino ◽  
...  
Keyword(s):  
Fish Oil ◽  
Circular Economy ◽  
Low Cost ◽  
Oxidative Degradation ◽  
Omega 3 ◽  
Antioxidant Agent ◽  
Extraction Cycle ◽  
Shrimp Oil ◽  
High Yields ◽  
By Products

A shrimp oil rich in omega-3 lipids and carotenoids is obtained in remarkably high 5 wt% yield extending to pink shrimp processing waste (head and carapace) the circular economy approach to extract fish oil from fish processing by-products using d-limonene. Biobased limonene, a powerful antimicrobial and antioxidant agent, is an excellent solvent for both lipids and astaxanthin-based carotenoids preventing oxidative degradation during the extraction cycle including solvent and oil separation at 85°C. A new low cost route is established to extract valued marine oil from biowaste annually made available in over 2.2 million tonnes.

scholarly journals Non-Extractable Polyphenols from Food By-Products: Current Knowledge on Recovery, Characterisation, and Potential Applications

Processes ◽  
2020 ◽  
Vol 8 (8) ◽  
pp. 925
Author(s):  
Yubin Ding ◽  
Ksenia Morozova ◽  
Matteo Scampicchio ◽  
Giovanna Ferrentino
Keyword(s):  
Molecular Weight ◽  
Current Knowledge ◽  
Biological Activities ◽  
Extraction Procedure ◽  
Economic Loss ◽  
Low Molecular Weight ◽  
Potential Applications ◽  
Valuable Compounds ◽  
Potential Food ◽  
By Products

Non-extractable polyphenols (NEPs), or bound polyphenols, are a significant fraction of polyphenols that are retained in the extraction residues after conventional aqueous organic solvent extraction. They include both high molecular weight polymeric polyphenols and low molecular weight phenolics attached to macromolecules. Current knowledge proved that these bioactive compounds possess high antioxidant, antidiabetic, and other biological activities. Plant-based food by-products, such as peels, pomace, and seeds, possess high amount of NEPs. The recovery of these valuable compounds is considered an effective way to recycle food by-products and mitigate pollution, bad manufacturing practice, and economic loss caused by the residues management. The current challenge to valorise NEPs from plant-based by-products is to increase the extraction efficiency with proper techniques, choose appropriate characterising methods, and explore potential functions to use in some products. Based on this scenario, the present review aims to summarise the extraction procedure and technologies applied to recover NEPs from plant-based by-products. Furthermore, it also describes the main techniques used for the characterisation of NEPs and outlines their potential food, pharmaceutical, nutraceutical, and cosmetic applications.

scholarly journals Management of Fruit Industrial By-Products—A Case Study on Circular Economy Approach

Molecules ◽  
2020 ◽  
Vol 25 (2) ◽  
pp. 320 ◽  
Author(s):  
Débora A. Campos ◽  
Ricardo Gómez-García ◽  
Ana A. Vilas-Boas ◽  
Ana Raquel Madureira ◽  
Maria Manuela Pintado
Keyword(s):  
Food Waste ◽  
Circular Economy ◽  
Economic Value ◽  
Industrial Applications ◽  
Global Issues ◽  
Global Issue ◽  
Social Environmental ◽  
Valuable Compounds ◽  
By Products

The management of industrial fruit by-products is important not only to decrease the volume of food waste accumulated in the landfills but also to develop strategies through reuse with the purpose to valorise and add economic value. The disposal of food waste leads to different global issues in different sectors, such as social, environmental and economical. These by-products represent a rich source of valuable compounds (polyphenols) with high antioxidant activity, which can be extracted through biotechnological methodologies for future industrial applications. In this context, the management of fruit by-products is challenged to move from a linear economy to a circular economy. Therefore, the purpose of this review is to provide a critical view of an integrated valorisation of fruit by-products to overcome a global issue, via the production of antioxidant extracts with high economic value. A case study of pineapple processing industrialization in a circular economy is explored and discussed.

scholarly journals Prunus avium L. (Sweet Cherry) By-Products: A Source of Phenolic Compounds with Antioxidant and Anti-Hyperglycemic Properties—A Review

2021 ◽  
Vol 11 (18) ◽  
pp. 8516
Author(s):  
Ana R. Nunes ◽  
Ana C. Gonçalves ◽  
Amílcar Falcão ◽  
Gilberto Alves ◽  
Luís R. Silva
Keyword(s):  
Phenolic Compounds ◽  
Sweet Cherry ◽  
Prunus Avium ◽  
Low Cost ◽  
Folk Medicine ◽  
Bioactive Constituents ◽  
Health Promoting ◽  
Ancient Times ◽  
By Products ◽  
Prunus Avium L

Prunus avium L. (sweet cherry) is one of the most appreciated fruit due to its organoleptic and nutritional value. Interestingly, cherry leaves, stems, and flowers are agri-food by-products rich in bioactive compounds that are mostly still unexploited. Stems and leaves have been used in folk medicine since ancient times. Recently, cherry flowers have also proved to be an interesting source of compounds with therapeutic properties. Phenolic compounds, namely hydroxycinnamic acids and flavonoids, are the most present phytochemicals in P. avium fruits and their by-products. These compounds have shown a good antioxidant potential to prevent oxidative stress-related diseases and glycemic control, fundamental in preventing and controlling diabetes mellitus. The present review summarizes the main phenolics found in P. avium stems, leaves, and flowers as compared to their fruits and describes their antioxidant and anti-hyperglycemic properties. Thus, these by-products are an accessible and low-cost source of bioactive constituents with interesting health-promoting properties, making their use promising in diabetes therapy.

Metakaolin Addition to Improve Geopolymerization Process and Properties of Waste Clay-Based Materials

2021 ◽  
Vol 325 ◽  
pp. 137-142
Author(s):  
Caterina Sgarlata ◽  
Alessandra Formia ◽  
Francesco Ferrari ◽  
Federica Piccolo ◽  
Cristina Leonelli
Keyword(s):  
Mechanical Properties ◽  
Circular Economy ◽  
Room Temperature ◽  
Mechanical Performance ◽  
Raw Materials ◽  
Setting Times ◽  
Water Ph ◽  
Conductivity Measures ◽  
Consolidation Degree ◽  
By Products

The exploitation of different kind of clayey waste (halloysitic, smectitic/illitic, kaolinitic) for the production of geopolymers in the view of a circular economy of mines is the main goal of this study. In particular, the addition of low percentages of metakaolin (5-15%) was evaluated to improve the chemical-physical properties and the consolidation degree of geopolymeric formulations produced with clays classified as mine’s by-products. In fact, these secondary raw materials are often not sufficient alone to obtain chemically stable formulations with acceptable mechanical properties but require the addition of reactive fillers. All samples contained thermally treated clays (600°C-700°C) and metakaolin as aluminosilicate precursors, alkaline solution of NaOH and Na2SiO3, and were cured at room temperature. The influence on the final products with MK addition was monitored with the evaluation of the chemical stability in water (pH and ionic conductivity measures), the comparison of setting times (Vicat needle) and mechanical performance.

Ag-TiO2 Nanoparticles-Catalyzed Three-Component Synthesis of 12-Aryl-8,9,10,12-Tetrahydrobenzo[a]-Xanthen-11-Ones in Aqueous Medium

2022 ◽  
Vol 25 ◽  
Author(s):  
Mahsa Lotfi Omran ◽  
Seyed Mohammad Vahdat ◽  
Farhosh Kiani Barforosh
Keyword(s):  
Tio2 Nanoparticles ◽  
Cost Efficiency ◽  
Room Temperature ◽  
Chromatographic Method ◽  
Low Cost ◽  
Easy Access ◽  
Atom Economy ◽  
One Pot ◽  
The Difference ◽  
By Products

Background: Ag–TiO2 nanoparticles catalyzed synthesis of 12-aryl-8,9,10,12-tetrahydrobenzo[a]-xanthen-11-ones have been enhanced via a three-component one-pot reaction betweenβ–naphthol, several aldehydes and dimedone in H2O at room temperature. Xanthenes are essential intermediates in chemistry owing to their vast difference in biological activity. Methods: This process offered significant advantages containing appropriate cost efficiency, low amount of the catalyst, application of low-cost available Ag–TiO2 nanoparticles catalyst, purification of the product by non-chromatographic method, easy process, good atom economy, simple isolation and reusability of nanocatalyst. Result: Ag–TiO2 nanoparticles catalyst shows easy access to Xanthenes with appropriate yields in short reaction time and purity. This nanoparticles catalyst was recycled and recovered by easy filtration and was reused up to five times with only an unimportant loss in its catalytic efficacy. Conclusion: This method achieves to have a numerous scope relating to the difference in the aldehydes. Correspondingly, the attractive of this research was that H2O was the only by-products.

scholarly journals Aromatic Potential and Bioactivity of Cork Stoppers and Cork By-Products

Foods ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 133 ◽  
Author(s):  
Ana Maria Mislata ◽  
Miquel Puxeu ◽  
Raul Ferrer-Gallego
Keyword(s):  
Circular Economy ◽  
Aromatic Compounds ◽  
Phenolic Composition ◽  
Volatile Phenols ◽  
Food Industries ◽  
Global Sustainability ◽  
Valuable Compounds ◽  
Cork Stoppers ◽  
By Products

The characterization of natural waste sources is the first step on the reutilization process, circular economy, and global sustainability. In this work, the aromatic composition and bioactive compounds related to beneficial health effects from cork stoppers and cork by-products were assessed in order to add value to these wastes. Twenty-three aromatic compounds with industrial interest were quantified by gas chromatography coupled mass spectrometry GC–MS in both samples. Vanillins and volatile phenols were the most abundant aromatic families. Other aromatic compounds, such as aldehydes, lactones, terpenols, and alcohols, were also determined. Furthermore, the phenolic composition and the antioxidant activity were also evaluated. Overall, extracts showed high aromatic and antioxidant potential to be further used in different industrial fields. The recovery of these valuable compounds from cork stoppers and cork by-products helps to reuse them in agricultural, cosmetic, pharmaceutical, or food industries.

scholarly journals Innovative Non-Thermal Technologies for Recovery and Valorization of Value-Added Products from Crustacean Processing By-Products—An Opportunity for a Circular Economy Approach

Foods ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 2030
Author(s):  
Ana Cristina De Aguiar Saldanha Pinheiro ◽  
Francisco J. Martí-Quijal ◽  
Francisco J. Barba ◽  
Silvia Tappi ◽  
Pietro Rocculi
Keyword(s):  
Circular Economy ◽  
Value Added ◽  
Industrial Applications ◽  
Anti Cancer ◽  
Seafood Industry ◽  
Seafood Products ◽  
Valuable Compounds ◽  
Technological Strategies ◽  
By Products

The crustacean processing industry has experienced significant growth over recent decades resulting in the production of a great number of by-products. Crustacean by-products contain several valuable components such as proteins, lipids, and carotenoids, especially astaxanthin and chitin. When isolated, these valuable compounds are characterized by bioactivities such as anti-microbial, antioxidant, and anti-cancer ones, and that could be used as nutraceutical ingredients or additives in the food, pharmaceutical, and cosmetic industries. Different innovative non-thermal technologies have appeared as promising, safe, and efficient tools to recover these valuable compounds. This review aims at providing a summary of the main compounds that can be extracted from crustacean by-products, and of the results obtained by applying the main innovative non-thermal processes for recovering such high-value products. Moreover, from the perspective of the circular economy approach, specific case studies on some current applications of the recovered compounds in the seafood industry are presented. The extraction of valuable components from crustacean by-products, combined with the development of novel technological strategies aimed at their recovery and purification, will allow for important results related to the long-term sustainability of the seafood industry to be obtained. Furthermore, the reuse of extracted components in seafood products is an interesting strategy to increase the value of the seafood sector overall. However, to date, there are limited industrial applications for this promising approach.

Temperature Dependence of the Self-Assembled Styrene Based Random Ionomers in Aqueous Solution

2003 ◽  
Vol 775 ◽  
Author(s):  
Sung-Hwa Oh ◽  
Ju-Myung Song ◽  
Joon-Seop Kim ◽  
Hyang-Rim Oh ◽  
Jeong-A Yu
Keyword(s):  
Partition Coefficients ◽  
Room Temperature ◽  
Aqueous Media ◽  
The Self ◽  
Spectroscopic Methods ◽  
Ion Content ◽  
Repeat Units ◽  
Notable Effect ◽  
Order Of Magnitude ◽  
Experimental Errors

AbstractSolution behaviors of poly(styrene-co-sodium methacrylate) were studied by fluorescence spectroscopic methods using pyrene as a probe. The mol% of methacrylate was in the range 3.6–9.4. Water and N,N-dimethylforamide(DMF) mixture was used as a solvent (DMF/water = 0.2 mol %). The critical micelle (or aggregation) concentrations of ionomers and the partition coefficients of pyrene were obtained the temperature range 10–80°C. At room temperature, the values of CMCs (or CACs) were in the range 4.7 ×10-6 5.3 ×10-6 g/mL and we could not find any notable effect of the content of ionic repeat units within the experimental errors. Unlike CMCs, as the ion content increased, partitioning of pyrene between the hydrophobic aggregates and an aqueous media decreased from 1.5 ×105 to 9.4 ×104. As the temperature increased from 10 to 80 °C, the values of CMCs increased less than one order of magnitude. While, the partition coefficients of pyrene decreased one order of magnitude and the effect of the ion content became negligible.

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