China 
Africa 
Explore chapters and articles related to this topic
Polylactic Acid: An Eco-Friendly Material in the Packaging Industry, Paving the Way Toward a Greener Environment
Published in Neha Kanwar Rawat, Iuliana Stoica, A. K. Haghi, Green Polymer Chemistry and Composites, 2021
S. Roopa, B. Sowmya, S. Preethi, Arul Maximus Rabel
Polyphenols are a class of bioactive molecules that are packed with antioxidants and have potential health benefits. polyphenols can improve or help digestion issues, weight management difficulties, diabetes, neurodegenerative disease, and cardiovascular diseases (Ana Gotter, 2017). To make use of polyphenols in active food packaging, Liu et al. (2018) prepared PLA/tea polyphenol (PLA/TP) composite nanofibers for food packaging applications. The DPPH assay analysis reveals that PLA/TP has improved antioxidant activity as compared to neat PLA and the antioxidant activity increased with an increase in the TP content. The antimicrobial activity of composite and PLA fibers against E. coli and S. aureus was determined using the vibration method. The composite nanofibers retarded the growth of E. coli and S. aureus, whereas PLA nanofibers had no appreciable antimicrobial activity. The antimicrobial activity against E. coli and S. aureus improved with increasing TP content. It was evident that the addition of a bioactive tea polyphenol improved the oxidative stability and extended the storage period of food. These nanofibers are effective in active packaging applications.
Lignin in Biological Systems
Published in Severian Dumitriu, Valentin Popa, Polymeric Biomaterials, 2020
The researches on naturally occurring polyphenols have received more attention in human medicine, versus animal agriculture, as polyphenols exert several health benefits in humans. First, they inhibit oxidation of low-density lipoproteins, thereby decreasing risks of heart diseases. Second, polyphenols possess anti-inflammatory and anticarcinogenic properties and third, they are effective antioxidants for food lipids. Third, the neuronal toxicity is mediated and enhanced by reactive oxygen species (ROS) or reactive nitrogen species (RNS) and thus that the oxidative stress accelerates the cell death of neuronal cells in neurodegenerative disorders. In fact, such neuronal cell death has been reported to be attenuated by antioxidants and free radical scavengers (Catignani and Carter 1982).
Larrea tridentata Polyphenols Obtained by Reflux and Ultrasound-Assisted Extraction
Published in Cristobal N. Aguilar, Suresh C. Ameta, A. K. Haghi, Green Chemistry and Biodiversity, 2019
Karina Cruz-Aldaco, Daniela Sánchez-Aldana, Salvador Ortega-Hernández, Guadalupe Cárdenas-Félix, Antonio Aguilera-Carbo, Juan Alberto Ascasio-Valdes, Raúl Rodriguez-Herrera, Cristóbal Noé Aguilar
Extraction of polyphenolic compounds (antioxidants) and antimicrobial compounds from a semi-this plant can be carried out by traditional extraction (Soxhlet, infusion, and maceration) and supercritical fluid extraction. These extraction methods can cause damage or loss of antioxidant activity in the compounds extracted by the use of high temperatures for long periods. That is why the interest in the application of sonochemistry for extraction of natural products has increased and is due to its advantages (Lianfu and Zelong, 2008; Rodrigues et al., 2007). This technique has proven to be one of the most important for the extraction of bioactive plant to be adaptable to a small or large scale, be cheap, uses less solvent, low temperatures, and time of final extraction, energy saving, it is also very useful for extracting heat labile and unstable compounds and therefore provides increased extraction yield (Liu et al., 2010; Ma et al., 2008; Liafun and Zelong, 2008).
Macroporous adsorptive resin-assisted enrichment of polyphenol from Psidium guajava leaves improved its in vitro antioxidant and anti-hemolytic properties
Published in Preparative Biochemistry & Biotechnology, 2023
Francis Uchenna Umeoguaju, Joyce Oronne Akaninwor, Eka Bassey Essien, Benjamin Achor Amadi, Ezenwa James Chukeze, Ifunanya Rosemary Nwafor
Enrichment of plant polyphenols often starts with the selective extraction of polyphenols from plant matrices in processes that may involve treatments of plant materials with organic solvents, enzymes, microwave, ultrasound, supercritical fluids, pulse electric field and inorganic chemicals.[5,6] Subsequent treatments with deep eutectic solvents, aqueous two-phase system or subjecting them to liquid-liquid solvent partitioning, counter current chromatography, membrane filtration, resin adsorption or column chromatography with silica gel, ion exchange resins or gel filtration matrixes have been applied in purifying total or individual polyphenols from plant extracts.[7–11] Some of these techniques are sophisticated, utilizes potentially toxic or expensive reagents and requires skilled man-power to carry out. Comparatively, the use of Macroporous Adsorptive Resins (MAR), a porous synthetic polymers of styrene or acrylate, is considered a more economical, easier, faster and an environmental-friendly way of enriching polyphenols from plant extracts.[12–16] This is in addition to MAR’s high polyphenols adsorption efficiency, high loading capacity and reusability.[15,16] MARs have being previously used in enriching total polyphenols from different plant extracts.[17–20]
Sour cherry juice concentrate powdered by high and low temperature spray drying with pea protein as a carrier—Physical properties, antioxidant activity and in vitro bioaccessibility
Published in Drying Technology, 2023
Alicja Barańska, Michał Świeca, Katarzyna Samborska
Sour cherry (Prunus cereasus L.) is mostly cultivated in Eastern Europe, Nordic countries and North America.[1] The consumption of fresh sour cherry is limited due to its bitter and astringent taste which results from high acid to sugar ratio and phenolic profile.[2] Therefore, sour cherry is considered to be one of the most processed fruit and is commonly used in food industry in juice, jams, wine and beverages production. Turning it into a powder and prolonging its shelf-life enables to broaden the application in bakery, dairy and instant products, and baby foods.[3,4] Sour cherry is recognized as being a rich source of phenolics, especially anthocyanins: cyanidin-3-glucoside, cyanidin-3-glucosylrutinoside, cyanidin-3-sophoroside, and cyanidin-3-rutinoside, that characterize with health beneficial properties.[5] Polyphenols have been proved to demonstrate antioxidant and anti-inflammatory activity, to prevent cardiovascular diseases, diabetes, cancer, osteoporosis and neurodegenerative diseases.[2] These properties of the sour cherry could eventually lead to its application in functional foods and nutraceuticals.
Extractor dimensions affect optimization of laboratory-scale batch solid-liquid extraction of polyphenols from plant material: potato peels as a case study
Published in Chemical Engineering Communications, 2021
Sherif Shaheen, Spyros Grigorakis, Abedalghani Halahlah, Sofia Loupassaki, Dimitris P. Makris
Bioactive compounds from natural sources have a vast spectrum of applications in food, pharmaceutical, and cosmetics industries, due to increasing evidence that several secondary plant metabolites may have health benefits and contribute in the prevention of degenerative diseases. Phytochemicals from natural products are now widely used as food additives (antioxidants, pigments), food supplements, cosmetic ingredients, and so forth (Cavalcanti et al. 2013), a fact highlighting their industrial and commercial importance. Bioactive plant constituents may belong to several chemical families, yet most probably the one with the highest prominence is the family of polyphenols. Polyphenolic substances are of widespread occurrence in almost all edible plant tissues, and embrace numerous chemical structures, categorized in distinct subclasses. The biological activities attributed to polyphenols include a range of functions, such as antioxidant, anti-inflammatory, anti-atherogenic, and cancer chemopreventive (Brglez Mojzer et al. 2016; Li et al. 2014).