scholarly journals Preparation, Characterization and Antibacterial Activity of Pomegranate Peel Extract and Chitosan-Silver Nanoparticles Using Electrochemical Method.

2020 ◽  
Vol 17 ◽  
pp. 222-244
Author(s):  
Afaf Sarhan ◽  
M. I. Abdel Hamid ◽  
Sabrien A. Omar ◽  
R. Hanie
Keyword(s):  
Silver Nanoparticles ◽  
Uv Spectroscopy ◽  
Electrochemical Process ◽  
Gravimetric Analysis ◽  
X Ray Diffraction ◽  
Pomegranate Peel ◽  
Vis Spectroscopy ◽  
Pomegranate Peel Extract ◽  
Average Size ◽  
Peel Extract

The present work involves the development of chitosan-pomegranate peel extract and silver nanoparticles (Cs-PPE-AgNPs) using electrochemical process followed by UV irradiation reduction. Formation of silver nanoparticles characterize by UV–vis spectroscopy, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), differential thermal analysis (DTA), SEM, Swelling and thermal gravimetric analysis (TGA). The obtain nanoparticles average size was 34.6 nm. UV Spectroscopy show new peak at 405nm indicate the formation of AgNPs particles. Cs-PPE and Cs-PPE-AgNPs also demon started a relativity high antibacterial against Escherichia coli and Staphylococcus aureus bacteria.

scholarly journals Preparation, Characterization and Antibacterial Efficiency of Olive Leaves Extract and Chitosan-Silver Nanoparticles using Electrochemical Method

2019 ◽  
Vol 15 ◽  
pp. 6152-6164
Author(s):  
Moustafa Tawfik Ahmed
Keyword(s):  
Silver Nanoparticles ◽  
Uv Spectroscopy ◽  
Good Alternative ◽  
Gravimetric Analysis ◽  
X Ray Diffraction ◽  
Olive Leaves ◽  
Scanning Calorimetry ◽  
Electrochemical Approach ◽  
Vis Spectroscopy ◽  
Average Size

The present work involves the improvement of chitosan-olive leaves extract and silver nanoparticles (Cs-OLE-AgNPs) using electrochemical approach followed by UV-irradiation reduction. The formation of silver nanoparticles (AgNPs) was characterized via UV–vis spectroscopy, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), differential scanning calorimetry (DSC), EDX, thermal gravimetric analysis (TGA) and Swelling. The obtained nanoparticles average size was 36.19 nm. UV Spectroscopy show increase of peaks at 320 and 345 nm indicate the formation of a large cluster of AgNPs. Cs-OLE and Cs-OLE-AgNPs also demon started a relativity high antibacterial against both Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) bacteria. AgNPs show broadspectrum antibacterial activity at lower concentration (0.56%) and may be regarded as a good alternative therapeutic approach in the future.

A Green Protocol for Synthesis of MAl2O4, [M=Cu and Co] Spinels Under Microwave Irradiation Method

2016 ◽  
Vol 16 (03) ◽  
pp. 1650033 ◽  
Author(s):  
R. Yuvasravana ◽  
P. P. George
Keyword(s):  
Microwave Assisted Synthesis ◽  
X Ray Diffraction ◽  
Green Protocol ◽  
Stabilizing Agents ◽  
Microwave Combustion ◽  
Vis Spectroscopy ◽  
Spinel Composition ◽  
Co Nanoparticles ◽  
Pomegranate Peel Extract ◽  
Peel Extract

Nanosized metal aluminates MAl2O4, [[Formula: see text] and Co] are synthesized from their nitrates solution by using pomegranate peel extract as fuel in microwave combustion. MAl2O4 [[Formula: see text] and Co] nanoparticles are grown in microwave assisted synthesis followed by annealing at 700[Formula: see text]C. The nanoparticles have been characterized by powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), UV-VIS spectroscopy and photoluminescence (PL) spectroscopy. The PXRD analysis has confirmed their spinel composition. The green protocol and microwave combustion route for spinel synthesis are rapid, simple, without any hazardous chemicals as reducing or stabilizing agents and economical.

scholarly journals Green Synthesis of Silver Nanoparticles Using Pomegranate and Orange Peel Extracts and Their Antifungal Activity against Alternaria solani, the Causal Agent of Early Blight Disease of Tomato

Plants ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 2363
Author(s):  
Yasser S. Mostafa ◽  
Saad A. Alamri ◽  
Sulaiman A. Alrumman ◽  
Mohamed Hashem ◽  
Zakaria A. Baka
Keyword(s):  
Silver Nanoparticles ◽  
Orange Peel ◽  
Alternaria Solani ◽  
Pomegranate Peel ◽  
Orange Peels ◽  
Crude Extracts ◽  
Biosynthesized Agnps ◽  
Pomegranate Peel Extract ◽  
Orange Peel Extract ◽  
Peel Extract

This study aimed to synthesize silver nanoparticles (AgNPs) by pomegranate and orange peel extracts using a low concentration of AgNO3 solution to controlearly blight of tomato caused by Alternaria solani. The pathogen was isolated from infected tomato plants growing in different areas of Saudi Arabia. The isolates of this pathogen were morphologically and molecularly identified. Extracts from peels of pomegranate and orange fruits effectively developed a simple, quick, eco-friendly and economical method through a synthesis of AgNPs as antifungal agents against A. solani. Phenolic content in the pomegranate peel extract was greater than orange peel extract. Phenolic compounds showed a variation of both peel extracts as identified and quantified by High-Performance Liquid Chromatography. The phenolic composition displayed variability as the pomegranate peel extract exhibited an exorbitant amount of Quercitrin (23.62 mg/g DW), while orange peel extract recorded a high amount of Chlorogenic acid (5.92 mg/g DW). Biosynthesized AgNPs were characterized using UV- visible spectroscopy which recorded an average wavelength of 437 nm and 450 nm for pomegranate and orange peels, respectively. Fourier-transform infrared spectroscopy exhibited 32x73.24, 2223.71, 2047.29 and 1972.46 cm−1, and 3260.70, 1634.62, 1376.62 and 1243.76 cm−1 for pomegranate and orange peels, respectively. Transmission electron microscopy showed spherical shape of nanoparticles. Zetasizer analysis presented negative charge values; −16.9 and −19.5 mV with average particle sizes 8 and 14 nm fin case of pomegranate and orange peels, respectively. In vitro, antifungal assay was done to estimate the possibility of biosynthesized AgNPs and crude extracts of fruit peels to reduce the mycelial growth of A. solani. AgNPs displayed more fungal mycelial inhibition than crude extracts of two peels and AgNO3. We recommend the use of AgNPs synthesized from fruit peels for controlling fungal plant pathogens and may be applied broadly and safely in place by using the chemical fungicides, which display high toxicity for humans.

Physicochemical Properties and Antimicrobial Potential of Green Synthesized Cerium Oxide (CeO2) Nanoparticles from Pomegranate Peel Extract

2021 ◽  
Vol 14 (1) ◽  
pp. 71-78
Keyword(s):  
Antimicrobial Activity ◽  
Biomedical Applications ◽  
Punica Granatum ◽  
Ceo2 Nanoparticles ◽  
X Ray Diffraction ◽  
Fruit Peel ◽  
Pomegranate Peel ◽  
X Ray ◽  
Pomegranate Peel Extract ◽  
Peel Extract

Abstract: Green synthesis of CeO2 Nanoparticles (NPs) with small size and high stability paved the approach to recover and protect the environment by decreasing the use of toxic chemicals and eliminating biological risks in biomedical applications. Peel-mediated synthesis of CeO2 NPs is gaining more importance owing to its easiness and eco-friendliness. In this study, biosynthesis of CeO2 NPs using the fruit peel extract of punica granatum is reported. The synthesized CeO2 NPs are characterized by Powder X-ray Diffraction (PXRD), UV-Diffused Reflection Spectroscopy (UV-DRS), Field Emission Scanning Electron Microscopy (FESEM), Energy Dispersive X-Ray Analysis (EDAX) and antimicrobial activity. The CeO2 NPs show more lethal activity towards gram +ve bacteria than towards gram –ve bacteria. Keywords: Biosynthesis, Optical properties, Antimicrobial activity.

scholarly journals Biosynthesis, characterization and anti-dengue vector activity of silver nanoparticles prepared from Azadirachta indica and Citrullus colocynthis

2020 ◽  
Vol 7 (9) ◽  
pp. 200540
Author(s):  
Shafqat Rasool ◽  
Muhammad Akram Raza ◽  
Farkhanda Manzoor ◽  
Zakia Kanwal ◽  
Saira Riaz ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Aedes Aegypti ◽  
Larvicidal Activity ◽  
Azadirachta Indica ◽  
Citrullus Colocynthis ◽  
X Ray Diffraction ◽  
Vis Spectroscopy ◽  
The Face ◽  
Vector Activity ◽  
Average Size

We report here biosynthesis of silver nanoparticles (AgNPs) using aqueous extracts of (i) Azadirachta indica leaves and (ii) Citrullus colocynthis fruit and their larvicidal activity against Aedes aegypti. The UV–Vis spectroscopy absorption peaks occurred in the range of 412–416 nm for A. indica AgNPs and 416–431 nm for C. colocynthis AgNPs indicating the silver nature of prepared colloidal samples. The scanning electron microscopy examination revealed the spherical morphology of both types of NPs with average size of 17 ± 4 nm ( A. indica AgNPs) and 26 ± 5 nm ( C. colocynthis AgNPs). The X-ray diffraction pattern confirmed the face-centred cubic (FCC) structure with crystallite size of 11 ± 1 nm ( A. indica AgNPs) and 15 ± 1 nm ( C. colocynthis AgNPs) while characteristic peaks appearing in Fourier transform infrared spectroscopy analysis indicated the attachment of different biomolecules on AgNPs. The larvicidal activity at different concentrations of synthesized AgNPs (1–20 mg l −1 ) and extracts (0.5–1.5%) against Aedes aegypti was examined for 24 h. A concentration-dependent larvicidal potential of both types of AgNPs was observed. The LC 50 values were found to be 0.3 and 1.25 mg l −1 for C. colocynthis AgNPs and A. indica AgNPs, respectively. However, both extracts did not exhibit any notable larvicidal activity.

scholarly journals Green synthesis of silver nanoparticles using Omani pomegranate peel extract and two polyphenolic natural products: characterization and comparison of their antioxidant, antibacterial, and cytotoxic activities

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Pasent Gharib Saad ◽  
Rohan Daniel Castelino ◽  
Vimal Ravi ◽  
Issa Sulaiman Al-Amri ◽  
Shah Alam Khan
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Antimicrobial Agents ◽  
Color Change ◽  
Average Particle Size ◽  
Cytotoxic Activities ◽  
Average Particle ◽  
Pomegranate Peel ◽  
Pomegranate Peel Extract ◽  
Peel Extract

Abstract Background Green synthesis of silver nanoparticles (AgNPs) has gained popularity due to the economical and eco-friendly approach associated with it. The aim of the study was to biosynthesize silver nanoparticles using pomegranate peel extract (PPE), quercetin (Q), and gallic acid (GA) and to evaluate their antioxidant, antimicrobial, and cytotoxic activities. Results A sharp color change from yellow to brown, appearance of a peak in a UV spectrum around 413–425 nm, and four intense peaks in XRD spectra matching with the reference silver crystal confirmed the formation of AgNPs. SEM and TEM analysis revealed particles to be mostly spherical with few aggregates. Average particle size distribution and zeta potential was found to be 43.6 nm and −18.01mV, 31.6 nm and −21.5 mV, and 21.7 nm and −27.9 mV for Q-AgNPs, P-AgNPs, and GA-AgNPs, respectively. P-AgNPs showed excellent in vitro antioxidant activity (84.85–89.20%) and cytotoxic activity (100% mortality). P-AgNPs and GA-AgNPs exhibited good antimicrobial activity against the four bacterial strains comparable to the reference antibiotics but Q-AgNPs failed to inhibit the growth of P. vulgaris. Conclusions Omani pomegranate peel extract seems to be a potential and alternative source for the simple, one pot, eco-friendly green synthesis of extracellular stable AgNPs. The synthesized nanoparticles have the potential to be developed as possible antimicrobial agents and antioxidants. Graphical abstract

scholarly journals Green Synthesis of Silver Nanoparticles using Strobilanthes flaccidifolius Nees. Leaf Extract and its Antibacterial Activity

2016 ◽  
Vol 8 (1) ◽  
pp. 1523-1532 ◽  
Author(s):  
Sujata D Wangkheirakpam ◽  
Wangkheirakpam Radhapiyari Devi ◽  
Chingakham Brajakishore Singh ◽  
Warjeet S Laitonjam
Keyword(s):  
Electron Microscopy ◽  
Silver Nanoparticles ◽  
Leaf Extract ◽  
X Ray Diffraction ◽  
Paramagnetic Resonance ◽  
X Ray ◽  
Vis Spectroscopy ◽  
Electron Paramagnetic Resonance Technique ◽  
Average Size ◽  
Green Technique

The leaf extract of Strobilanthes flaccidifolius Nees. was used for the synthesis of silver nanoparticles through a green technique of synthesis. The nanoparticles was characterized by UV-VIS spectroscopy which proves the formation silver nanoparticles. FTIR (Fourier Transmission infra red spectroscopy) study was carried out to assess the biomolecule as indigo precursors, Energy dispersion X-ray analysis(EDX) data further proves it. EPR (Electron paramagnetic resonance technique) shows the free radical in silver neutral state and XRD(X-ray diffraction technique) also repots silver neutral formation.The morphology and the shape of the silver nanoparticles were determined by Scanning electron microscopy(SEM) and Tunneling electron microscopy (TEM).The nanoparticles adopted spherical morphology and the size ranging from 6nm to 54.11nm and average size was determined as 12.15± 5.3nm.The nanoparticles had antimicrobial activity

scholarly journals Antifungal and insecticidal activities of Raphanus sativus mediated AgNPs against mango leafhopper, Amritodus brevistylus and its associated fungus, Aspergillus niger

2017 ◽  
Vol 49 (1) ◽  
Author(s):  
R. Shanmugapriya ◽  
A. Nareshkumar ◽  
K. Meenambigai ◽  
R. Kokila ◽  
A. Shebriya ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Fungal Pathogen ◽  
Raphanus Sativus ◽  
Food Source ◽  
X Ray Diffraction ◽  
Inhibitory Zone ◽  
X Ray ◽  
Significant Toxicity ◽  
Vis Spectroscopy ◽  
Peel Extract

<em>Mangifera</em> <em>indica</em> is an important commercial fruit of India and primary food source for the mango leafhopper, <em>Amritodus</em> <em>brevistylus</em> further leading to the development of its associated fungus, <em>Aspergillus</em> <em>niger</em>. The present study was done to assess the antifungal and insecticidal activity of biologically synthesized silver nanoparticles using peel extracts of <em>Raphanus</em> <em>sativus</em> (Brassicaceae). <em>Raphanus sativus</em> peel extract is effective in extracellular reduction of Ag ions and capping the synthesized nanoparticles avoiding further agglomeration. The synthesized AgNPs are characterized by UV-vis spectroscopy, X-ray diffraction analysis, fourier transform infrared spectroscopy, scanning electron microscopy and energy dispersive x-ray analysis. Biologically synthesized AgNPs exhibited significant toxicity (LC50 − 7.61 ppm/48h) over mango leafhopper, <em>Amritodus</em> <em>brevistylus</em>. Silver nanoparticles synthesized using <em>Raphanus</em> <em>sativus</em> is also effective against the fungal pathogen, <em>Aspergillus</em> <em>niger</em> (developed on the infestations of mango leafhopper, <em>Amritodus</em> <em>brevistylus</em>) showing very strong inhibitory zone (80 mm).

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