Recovery of phenolic compounds from citrus by-products using pressurized liquids — An application to orange peel

Phenolic compounds are linked to a number of health benefits, including antioxidant, antibacterial, antiglycaemic, antiviral, anticarcinogenic, anti-inflammatory and vasodilatory properties. To improve a great loss of phenolics during extrusion, researchers have investigated incorporating functional ingredients into the extrusion input mixture. Other reasons for the addition of active ingredients are the re-use of by-products from food technology, decreasing the calorie content of extruded food, inhibition of starch digestion, and the colour change of the gluten-free products. The paper presents 28 examples of new designs for extrusion based on rice, corn, cassava, sorghum, and lentil flours and on other crops, together with the analyses of phenolics. The present results show the highest total phenolic content in sorghum among cereals, and lentil flour and orange peel powder among mixtures for extrusion to prepare extrudates. The highest content of total flavonols was found in the mixture containing corn and freeze-dried red and purple potatoes.

Download Full-text

By-Products of Camu-Camu [Myrciaria dubia (Kunth) McVaugh] as Promising Sources of Bioactive High Added-Value Food Ingredients: Functionalization of Yogurts

Molecules ◽

10.3390/molecules25010070 ◽

2019 ◽

Vol 25 (1) ◽

pp. 70 ◽

Cited By ~ 2

Author(s):

Natália Conceição ◽

Bianca R. Albuquerque ◽

Carla Pereira ◽

Rúbia C. G. Corrêa ◽

Camila B. Lopes ◽

...

Keyword(s):

Chemical Composition ◽

Phenolic Compounds ◽

Food System ◽

Food Additives ◽

Added Value ◽

Phenolic Profile ◽

Food Ingredients ◽

Myrciaria Dubia ◽

By Products ◽

Fruit Part

Camu-camu (Myrciaria dubia (Kunth) McVaugh) is a fruit economically relevant to the Amazon region, mostly consumed in the form of processed pulp. Our aim was to perform an unprecedented comparative study on the chemical composition and bioactivities of the camu-camu pulp and industrial bio-residues (peel and seed), and then the most promising fruit part was further explored as a functionalized ingredient in yogurt. A total of twenty-three phenolic compounds were identified, with myricetin-O-pentoside and cyanindin-3-O-glucoside being the main compounds in peels, followed by p-coumaroyl hexoside in the pulp, and ellagic acid in the seeds. The peel displayed the richest phenolic profile among samples, as well as the most significant antibacterial (MICs = 0.625–10 mg/mL) and anti-proliferative (GI50 = 180 µg/mL against HeLa cells) activities. For this reason, it was selected to be introduced in a food system (yogurt). Taken together, our results suggest the possibility of using the camu-camu peel as a source of food additives.

Download Full-text

Extraction of Phenolic Compounds and Terpenes from Cannabis sativa L. By-Products: From Conventional to Intensified Processes

Antioxidants ◽

10.3390/antiox10060942 ◽

2021 ◽

Vol 10 (6) ◽

pp. 942

Author(s):

Emilie Isidore ◽

Hamza Karim ◽

Irina Ioannou

Keyword(s):

Phenolic Compounds ◽

Cannabis Sativa ◽

Biological Activities ◽

Operating Conditions ◽

Extraction Techniques ◽

Ultrasound Assisted Extraction ◽

Assisted Extraction ◽

Whole Plant ◽

Conventional Solvent Extraction ◽

By Products

Cannabis sativa L. is a controversial crop due to its high tetrahydrocannabinol content varieties; however, the hemp varieties get an increased interest. This paper describes (i) the main categories of phenolic compounds (flavonoids, stilbenoids and lignans) and terpenes (monoterpenes and sesquiterpenes) from C. sativa by-products and their biological activities and (ii) the main extraction techniques for their recovery. It includes not only common techniques such as conventional solvent extraction, and hydrodistillation, but also intensification and emerging techniques such as ultrasound-assisted extraction or supercritical CO2 extraction. The effect of the operating conditions on the yield and composition of these categories of phenolic compounds and terpenes was discussed. A thorough investigation of innovative extraction techniques is indeed crucial for the extraction of phenolic compounds and terpenes from cannabis toward a sustainable industrial valorization of the whole plant.

Download Full-text

Assessment of in-vitro bioaccessibility and antioxidant capacity of phenolic compounds extracts recovered from grapevine bunch stem and cane by-products

Food Chemistry ◽

10.1016/j.foodchem.2021.129063 ◽

2021 ◽

Vol 348 ◽

pp. 129063

Author(s):

Susana Ferreyra ◽

Carolina Torres-Palazzolo ◽

Rubén Bottini ◽

Alejandra Camargo ◽

Ariel Fontana

Keyword(s):

Phenolic Compounds ◽

Antioxidant Capacity ◽

In Vitro Bioaccessibility ◽

By Products

Download Full-text

Study of antioxidant activity and phenolic compounds of extracts obtained from different craft beer by-products

Journal of Cereal Science ◽

10.1016/j.jcs.2021.103162 ◽

2021 ◽

pp. 103162

Author(s):

M.J. Petrón ◽

A.I. Andrés ◽

G. Esteban ◽

M.L. Timón

Keyword(s):

Antioxidant Activity ◽

Phenolic Compounds ◽

Craft Beer ◽

By Products

Download Full-text

ecovery of phenolic compounds from agro-industrial by-products: evaluating antiradical activities and immunomodulatory properties

Food and Bioproducts Processing ◽

10.1016/j.fbp.2021.03.015 ◽

2021 ◽

Author(s):

Parisa Abbasi-Parizad ◽

Patriza De Nisi ◽

Barbara Scaglia ◽

Alessio Scarafoni ◽

Salvatore Pilu ◽

...

Keyword(s):

Phenolic Compounds ◽

Immunomodulatory Properties ◽

By Products

Download Full-text

Optimization of Ultrasound-Assisted Extraction via Sonotrode of Phenolic Compounds from Orange By-Products

Foods ◽

10.3390/foods10051120 ◽

2021 ◽

Vol 10 (5) ◽

pp. 1120

Author(s):

María del Carmen Razola-Diaz ◽

Eduardo Jesús Guerra-Hernández ◽

Celia Rodríguez-Pérez ◽

Ana María Gómez-Caravaca ◽

Belén García-Villanova ◽

...

Keyword(s):

Antioxidant Activity ◽

Phenolic Compounds ◽

High Performance ◽

Phenolic Content ◽

Orange Peel ◽

Polar Compounds ◽

Ultrasound Assisted Extraction ◽

Assisted Extraction ◽

Quantitative Analyses ◽

Ultrasound Assisted

Orange peel is the main by-product from orange juice industry. It is a known source of bioactive compounds, mostly phenolic compounds, and it has been widely studied for its healthy activities. Thus, this research focuses on the establishment of ultrasound-assisted extraction of phenolic compounds in orange peel using a sonotrode. For this purpose, a Box–Behnken design of 27 experiments was carried out with four independent factors—ratio ethanol/water (v/v), time (min), amplitude (%), and pulse (%). Quantitative analyses of phenolic compounds were performed and the antioxidant activity was measured by ABTS and DPPH methods. The validity of the experimental design was confirmed by ANOVA and the optimal sonotrode extraction conditions were obtained by response surface methodology (RSM). The extracts obtained in the established conditions were analyzed by High Performance Liquid Chromatography (HPLC) coupled to mass spectrometer detector and 74 polar compounds were identified. The highest phenolic content and antioxidant activity were obtained using 45/55 ethanol/water (v/v), 35 min, amplitude 90% (110 W), and pulse 100%. The established method allows an increment of phenolics recovery up to 60% higher than a conventional extraction. Moreover, the effect of drying on phenolic content was also evaluated.

Download Full-text

Latest Insights on Novel Deep Eutectic Solvents (DES) for Sustainable Extraction of Phenolic Compounds from Natural Sources

Molecules ◽

10.3390/molecules26165037 ◽

2021 ◽

Vol 26 (16) ◽

pp. 5037

Author(s):

Julio Serna-Vázquez ◽

Mohd Zamidi Ahmad ◽

Grzegorz Boczkaj ◽

Roberto Castro-Muñoz

Keyword(s):

Phenolic Compounds ◽

Molecular Mechanisms ◽

Deep Eutectic Solvents ◽

Natural Sources ◽

Extraction Solvent ◽

Potential Applications ◽

Extraction Processes ◽

Phenolic Extraction ◽

Sustainable Extraction ◽

By Products

Phenolic compounds have long been of great importance in the pharmaceutical, food, and cosmetic industries. Unfortunately, conventional extraction procedures have a high cost and are time consuming, and the solvents used can represent a safety risk for operators, consumers, and the environment. Deep eutectic solvents (DESs) are green alternatives for extraction processes, given their low or non-toxicity, biodegradability, and reusability. This review discusses the latest research (in the last two years) employing DESs for phenolic extraction, solvent components, extraction yields, extraction method characteristics, and reviewing the phenolic sources (natural products, by-products, wastes, etc.). This work also analyzes and discusses the most relevant DES-based studies for phenolic extraction from natural sources, their extraction strategies using DESs, their molecular mechanisms, and potential applications.

Download Full-text