Making good use of the byproducts of cultivation: green synthesis and antibacterial effects of silver nanoparticles using the leaf extract of blueberry

Li, Kun; Ma, Chenyu; Jian, Tiancai; Sun, Hushan; Wang, Lei; Xu, Hui; Li, Weihuan; Su, Hongyan; Cheng, Xianhao

doi:10.1007/s13197-017-2815-1

Cited by 16 publications

(6 citation statements)

References 27 publications

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“…The morphology of the synthesized AgNPs was observed via TEM according to a method described by Li et al, with minor modifications [ 40 ]. A drop of the uniformly dispersed AgNP aqueous solution was deposited on a carbon-coated copper grid.…”

Section: Methodsmentioning

confidence: 99%

Characterization and Antimicrobial Activity of Silver Nanoparticles Synthesized with the Peel Extract of Mango

et al. 2021

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The green synthesis of silver nanoparticles (AgNPs) from biological waste, as well as their excellent antibacterial properties, is currently attracting significant research attention. This study synthesized AgNPs from different mango peel extract concentrations while investigating their characteristics and antibacterial properties. The results showed that the AgNPs were irregular with rod-like, spherical shapes and were detected in a range of 25 nm to 75 nm. The AgNPs displayed antibacterial activity against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), showing a more significant impact when synthesized with 0.20 g/mL of mango peel extract. Therefore, the antibacterial effect of different diluted AgNP concentrations on the growth kinetic curves of E. coli and S. aureus after synthesis with 0.20 g/mL mango peel extract was analyzed. The results indicated that the AgNP antibacterial activity was higher against S. aureus than against E. coli, while the AgNP IC50 in these two strains was approximately 1.557 mg/mL and 2.335 mg/L, respectively. This research provides new insights regarding the use of postharvest mango byproducts and the potential for developing additional AgNP composite antibacterial materials for fruit and vegetable preservation.

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Section: Methodsmentioning

confidence: 99%

Characterization and Antimicrobial Activity of Silver Nanoparticles Synthesized with the Peel Extract of Mango

et al. 2021

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“…In the spectrum of DP and DP-PP lms, the C-O component of the pectin ester bond caused a peak at 1743 cm -1 , while the stretching vibration bands at 1700 cm -1 and 1590 cm -1 were caused by cyclopentene and alkane (Nesic, et al, 2017). The band at 1100 cm -1 was related to the C-O stretching vibration of phenols (K. Li, et al, 2017). The band that appeared at 1010 cm -1 was related to the presence of a pyranose ring structure and a C-O-C glycosidic bond (J. Li, Niu, Zhang, & Zeng, 2020).…”

Section: Ft-ir Spectroscopymentioning

confidence: 99%

Cost-efficient bio-based food packaging films from the dragon fruit peel and pomegranate peel

Wang

Xue

et al. 2022

Preprint

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In this study, two fruit processing coproducts, pomegranate peel and dragon fruit peel, were mixed to fabricate a composite film that can be used in food packaging. Therefore, the purpose of this study was to prepare and evaluate a dragon fruit peel polysaccharide film incorporating pomegranate peel polyphenols. The films were evaluated for their morphology, mechanical properties, crystallinity, solubility, UV resistance, oxidation resistance, and bacteriostatic properties. Different concentrations (0, 0.3, 0.5, 0.7%, w/w) of pomegranate peel polyphenols were added to the dragon fruit peel polysaccharide film by casting technology. The results showed that the addition of pomegranate peel polyphenols made the film hydrophobic, decreased the water vapor transmission rate of the film, and reduced the solubility of the film (p<0.05). Furthermore, the UV transmittance decreased with increasing concentration of pomegranate peel polyphenols (p < 0.05). By contrast, the thermal properties were not significantly affected by the concentration of pomegranate peel polyphenols. After the addition of pomegranate peel polyphenols, the surface of the film became rougher while the cross-section became smoother. X-ray diffraction (XRD) analysis and Fourier transform infrared (FTIR) spectroscopy showed that the crystalline nature and functional groups of the film did not change significantly. The compatibility of the film-forming substances was good, and the obtained films also exhibited good mechanical properties. Importantly, the addition of pomegranate peel polyphenols endowed the dragon fruit peel polysaccharide film with excellent antibacterial properties, while also significantly improves the antioxidant activity and UV-resistance of the film. The dragon fruit peel polysaccharide film with 0.7% (w/w) pomegranate peel polyphenols showed the best overall performance. This alternative material is a potential substitute for petrochemical packaging, alleviating serious environmental pollution problems.

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“…The evaluation of food antioxidant capacity is considered to be an important step prior to the definition of the food's antioxidant phytochemical nature, since a high antioxidant potency warrants the classification of these food products as "super foods" (Li et al, 2017).…”

Section: Antioxidant Capacitymentioning

confidence: 99%

High pressure extraction increases the antioxidant potential and in vitro bio-accessibility of bioactive compounds from discarded blueberries

Briones-Labarca

Giovagnoli-Vicuña

Chacana-Ojeda

2019

CyTA - Journal of Food

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Unlike conventional extraction (CE) methods, high hydrostatic pressure extraction (HHPE) uses less solvent volume and reduced extraction times. We show here that HHPE increases extractability, antioxidant capacity and bio-accessibility of the bioactive compounds from discarded blueberries when compared to CE. Bioactive compounds were extracted by CE with agitation and by HHPE at 500 MPa for 5, 10 and 15 min. The highest content of anthocyanins (117.08mg 100g −1 FW), polyphenols (9.56mg 100g −1 FW), flavonoids (0.62mg 100g −1 FW) and antioxidant capacities (1853.69 and 2059.55 μMg −1 FW for DPPH and FRAP, respectively) with HHPE for 15 min. Likewise, HHPE for 15 min resulted in the highest bio-accessibility of polyphenols (62.2%) and flavonoids (62.2%), whereas 85.1% and 60.9% of antioxidant capacity measured as DPPH and FRAP, respectively. Only anthocyanins showed decreased bio-accessibility after HHPE. Antioxidant potential of discarded blueberries can be enhanced with HHPE by increasing the extractability of bioactive compounds and their bio-accessibility. La extracción por alta presión incrementa el potencial antioxidante y la bioaccesibilidad in vitro de compuestos bioactivos a partir de arándanos descartados RESUMEN A diferencia del método de extracción convencional (CE), la extracción con alta presión hidrostática (HHPE) permite utilizar un menor volumen de solvente y reducir los tiempos de extracción. Aquí mostramos que el HHPE aumenta el rendimiento de extracción, la capacidad antioxidante y la bioaccesibilidad potencial de los compuestos bioactivos de arándanos descartados en comparación con CE. Los compuestos bioactivos se extrajeron mediante CE con agitación y con HHPE a 500 MPa durante 5, 10 y 15 min. El mayor contenido de antocianinas (117.08mg 100g −1 FW), polifenoles (9.56mg 100g −1 FW), flavonoides (0.62mg 100g −1 FW) y capacidad antioxidante (1853.69 y 2059.55 μMg −1 FW mediante DPPH y FRAP, respectivamente) fue con HHPE durante 15 min. Del mismo modo, el HHPE durante 15 minutos dio como resultado la mayor bio-accesibilidad potencial de polifenoles (62.2%) y flavonoides (62.2%), mientras que 85.1% y 60.9% de la capacidad antioxidante cuantificada como DPPH y FRAP, respectivamente. Solo las antocianinas mostraron una disminución de la bio-accesibilidad potencial después de HHPE. El potencial antioxidante de los arándanos descartados puede mejorar con HHPE al incrementar el rendimiento de extracción de los compuestos bioactivos y su bio-accesibilidad potencial.

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Making good use of the byproducts of cultivation: green synthesis and antibacterial effects of silver nanoparticles using the leaf extract of blueberry

Cited by 16 publications

References 27 publications

Characterization and Antimicrobial Activity of Silver Nanoparticles Synthesized with the Peel Extract of Mango

Characterization and Antimicrobial Activity of Silver Nanoparticles Synthesized with the Peel Extract of Mango

Cost-efficient bio-based food packaging films from the dragon fruit peel and pomegranate peel

High pressure extraction increases the antioxidant potential and in vitro bio-accessibility of bioactive compounds from discarded blueberries

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