A novel strategy for producing nano-particles from date seeds and enhancing their phenolic content and antioxidant properties using ultrasound-assisted extraction: A multivariate based optimization study

Mostafa, Hussein; Airouyuwa, Jennifer Osamede; Maqsood, Sajid

doi:10.1016/j.ultsonch.2022.106017

Cited by 24 publications

(16 citation statements)

References 51 publications

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“…In 80 % ethanol extract, the major phenolic compound was benzoic acid, and 3,4-Dihydroxy benzoic, whereas, in 80 % methanol extract, gallic acid followed by catechin were the major phenolic compounds. The 3,4-Dihydroxy benzoic acid which was one of the highest quantified phenolic compounds is considered to possess good antioxidant activities [42] , [76] .…”

Section: Resultsmentioning

confidence: 99%

“…The radical scavenging activity 1,1-diphenyl-2-picrylhydrazyl (DPPH) of the NADES-based date seed extracts was conducted as described by Mostafa, Airouyuwa and Maqsood [42] . The analysis was performed in triplicates and the results were expressed in mmol Trolox equivalents per gram of DSP (mmol TE/g powder).…”

Section: Methodsmentioning

confidence: 99%

“…The ABTS scavenging assay was analyzed following the method described by Mostafa et al [42] with slight modifications. The analysis was performed in triplicates and the results were expressed in mmol Trolox equivalents per gram of DSP (mmol TE/g powder).…”

Section: Methodsmentioning

confidence: 99%

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Utilization of natural deep eutectic solvents and ultrasound-assisted extraction as green extraction technique for the recovery of bioactive compounds from date palm (Phoenix dactylifera L.) seeds: An investigation into optimization of process parameters

Airouyuwa

Mostafa

Riaz

et al. 2022

Ultrasonics Sonochemistry

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Utilization of natural deep eutectic solvents and ultrasound-assisted extraction as green extraction technique for the recovery of bioactive compounds from date palm (Phoenix dactylifera L.) seeds: An investigation into optimization of process parameters

Airouyuwa

Mostafa

Riaz

et al. 2022

Ultrasonics Sonochemistry

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“…Given that the stabilizing or capping agents attached to the Ag 2 O QDs’ surface change the FTIR spectrum, it provides useful information about the surface chemistry of QDs (Fig. 2 A–D) 37 , 38 . The control spectrum (FCE) reflects the complex nature of biological materials (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…2 B, after the reaction of the FCE with silver ions and the formation of particulates, there was a shift in the peaks. These shifts indicate the binding of extract phytochemicals as coating and stabilizing agents to the surface of the quantum dots 38 , 39 . It is known that biological components reduce metal salts through their functional groups and form nanoparticles 39 , 40 .…”

Section: Resultsmentioning

confidence: 99%

Bioengineered synthesis of phytochemical-adorned green silver oxide (Ag2O) nanoparticles via Mentha pulegium and Ficus carica extracts with high antioxidant, antibacterial, and antifungal activities

Shirazi

Farimani

Foroumadi

et al. 2022

Sci Rep

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Silver oxide nanoparticles have various biomedical and pharmaceutical applications. However, conventional nanofabrication of Ag2O is associated with the use of toxic chemicals and organic solvents. To circumvent this hurdle, herein silver oxide quantum dots (Ag2O-QDs) were synthesized quickly (3 min) via the use of ultrasonic irradiation and plant-extract. Additionally, due to ultrasonic irradiation's effect on cell-wall destruction and augmentation of extraction efficiency, ultrasonic was also used in the preparation of Mentha pulegium and Ficus carica extracts (10 min, r.t) as natural eco-friendly reducing/capping agents. The UV–Vis result indicated a broad absorption peak at 400–500 nm. TEM/SEM analysis showed that ultrasound introduced a uniform spherical particle and significantly reduced particle size compared to the conventional heating method (∼ 9 nm vs. ∼ 100 nm). Silver and oxygen elements were found in the bio-synthesized Ag2O by EDS. The FTIR and phenol/flavonoid tests revealed the presence of phenol and flavonoid associated with the nanoparticles. Moreover, nanoparticles exhibited antioxidant/antibacterial/antifungal activities. The MIC and MBC results showed the Ag2O QDs synthesized with M. pulegium extract have the highest antibacterial activity against E. coli (MBC = MIC:15.6 ppm), which were significantly different from uncoated nanoparticles (MBC = MIC:500 ppm). The data reflects the role of phyto-synthesized Ag2O-QDs using ultrasonic-irradiation to develop versatile and green biomedical products.

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Active food packaging films from alginate and date palm pit extract: Physicochemical properties, antioxidant capacity, and stability

Khwaldia

M’Rabet

Boulila

2022

Food Science & Nutrition

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Date palm pits are highly available and inexpensive palm date by‐products, representing a valuable source of natural antioxidants, particularly phenolic compounds. Date palm pit extract (DPPE) was prepared from these waste products and characterized for its phenolic content and in vitro antioxidant activity. Profiling DPPE by liquid chromatography coupled with mass spectrometry (LC/MS) showed the presence of dimers and trimers of (epi)catechin as the main constituents. Alginate‐based films with four increasing concentrations of DPPE (10%, 20%, 30%, and 40% w/w) were prepared by the casting method. DPPE incorporation reduced solubility values of alginate films by 37%–64% and their surface wettability by 72%–111%. The incorporation of 10% DPPE improved water vapor barrier properties and increased tensile strength (TS) and elongation at break (%E) of alginate films by more than 23%, 50%, and 45%, respectively. The film containing 40% DPPE showed the lowest loss of phenolic content (32%), DPPH (1,1‐diphenyl‐2‐picrylhydrazyl) scavenging activity (38%), and ferric reducing antioxidant power (FRAP) (30%) after storage for 3 months.

show abstract

A novel strategy for producing nano-particles from date seeds and enhancing their phenolic content and antioxidant properties using ultrasound-assisted extraction: A multivariate based optimization study

Cited by 24 publications

References 51 publications

Utilization of natural deep eutectic solvents and ultrasound-assisted extraction as green extraction technique for the recovery of bioactive compounds from date palm (Phoenix dactylifera L.) seeds: An investigation into optimization of process parameters

Utilization of natural deep eutectic solvents and ultrasound-assisted extraction as green extraction technique for the recovery of bioactive compounds from date palm (Phoenix dactylifera L.) seeds: An investigation into optimization of process parameters

Bioengineered synthesis of phytochemical-adorned green silver oxide (Ag2O) nanoparticles via Mentha pulegium and Ficus carica extracts with high antioxidant, antibacterial, and antifungal activities

Active food packaging films from alginate and date palm pit extract: Physicochemical properties, antioxidant capacity, and stability

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