scholarly journals Structural Characterization, Antimicrobial and Antioxidant Assay of Biogenically Synthesized Maghemite (γ-Fe2O3) Nanoparticles

2021 ◽  
pp. 32-41
Author(s):  
A. Leema Rose ◽  
B. Shabushree ◽  
Preeja P. Thattil
Keyword(s):  
Antimicrobial Activity ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Leaf Extract ◽  
Ferrous Sulphate ◽  
Diffusion Method ◽  
Oxide Nanoparticles ◽  
Fe2o3 Nanoparticles ◽  
X Ray

Aims: The present study focused on the optical and morphological characterization, antioxidant and antimicrobial activities of the biogenically synthesized iron oxide nanoparticles.  Methods: The preliminary phytochemical screening was done for the leaf extract of Annona reticulate L. The leaf extract and Ferrous Sulphate heptahydrate were used to synthesize the iron oxide nanoparticles under room temperature. The determination of antioxidant activity was done using DPPH free radical scavenging assay and the determination of antimicrobial activity using disc diffusion method. Results: The UV-visible spectra showed the sharp absorption peak at 278 nm. The Fourier-transform infrared spectroscopy studies revealed the role of phytochemical constituents in the leaf extract for the iron oxide nanoparticles formation.  X-ray diffraction pattern showed the presence of γ phase of Fe2O3 nanoparticles. Scanning electron microscope analysis showed the moderately spherical morphology of γ-Fe2O3 nanoparticles and Energy-dispersive X-ray peaks showed the presence of iron and oxygen in the synthesized nanoparticles.  Particle size analysis showed that the synthesized γ-Fe2O3possessed an average size of 115.9 nm. Conclusion: The synthesized γ-Fe2O3 nanoparticles have potential antioxidant and antimicrobial activity.

scholarly journals STUDY OF IRON OXIDE NANOPARTICLES DOPED WITH COPPER: ANTIMICROBAL AND PHOTOCATALYTICAL ACTIVITY

2020 ◽  
Vol 11 (2) ◽  
Author(s):  
Aleksandra Šmitran ◽  
Dijana Jelić ◽  
Sanja Pržulj ◽  
Savka Vračević ◽  
Dragana Gajić ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Iron Oxide ◽  
Antimicrobial Resistance ◽  
Acinetobacter Baumannii ◽  
Iron Oxide Nanoparticles ◽  
Copper Ions ◽  
Technological Development ◽  
Inhibition Zone ◽  
Diffusion Method ◽  
Oxide Nanoparticles

Last decade is designated as the postantibiotic era due to increasing number of resistant and multiresistant strains of microorganisms, which developed resistance to one or more antibiotics. Antimicrobial resistance becomes a global health problem. This phenomenon of antimicrobial resistance will undoubtedly affect the efficiency and use of antibiotics in the future. Science and technological development are committed to researching and developing new antibiotics that will satisfy the missing criteria and address the problem of antimicrobial resistance. One of the possible solutions lies in nanotechnologies. Nanoparticles have been isolated as one of the most promising substances on which microorganisms rarely or even develop mechanisms of resistance. The nanoparticles may be in conjunction with already existing antibiotics structures and contribute to the improvement of physicochemical properties in order to successfully overcome the mechanism of antimicrobial resistance. By designing nanoparticles with proper physicochemical and biochemical characteristics we determine their application. The aim of this research is to dope synthesized iron oxide nanoparticles with copper ions in order to test their antimicrobial activity and to evaluate their use as potential antimicrobial agent. Extracts of green tea and ascorbic acid were used as reduction agent for the iron oxide nanoparticles doped with Cu. The antimicrobial activity of the synthesized nanoparticles on the isolates Acinetobacter baumannii and methicillin resistant Staphylococcus aureus (MRSA) was performed by the agar well diffusion method. Synthesized iron oxide nanoparticles showed activity against Acinetobacter baumannii with inhibition zone around 12 mm. Photocatalytical activity was also evaluated by UV/VIS spectrophotometry. Samples doped with copper showed much better photocatalytical performances.

scholarly journals Biogenic iron oxide nanoparticles enhance callogenesis and regeneration pattern of recalcitrant Cicer arietinum L.

PLoS ONE ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. e0242829
Author(s):  
Samra Irum ◽  
Nyla Jabeen ◽  
Khawaja Shafique Ahmad ◽  
Saima Shafique ◽  
Talha Farooq Khan ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Cicer Arietinum ◽  
Iron Oxide Nanoparticles ◽  
Shoot Regeneration ◽  
Callus Induction ◽  
Leaf Extract ◽  
Oxide Nanoparticles ◽  
Root Induction ◽  
X Ray ◽  
Embryo Axes

This study is the first report on the biosynthesized iron oxide nanoparticles (IONPs) which mediate in-vitro callus induction and shoot regeneration in economically important recalcitrant chickpea crop (Cicer arietinum L.). Here, we used leaf extract of Cymbopogon jwarancusa for the synthesis of IONPs in order to achieve a better biocompatibility. The bioactive compounds in C. jwarancusa leaf extract served as both reducing and capping agents in the fabrication process of IONPs. Field emission scanning electron microscopy (FE-SEM) revealed rods like surface morphology of IONPs with an average diameter of 50±0.2 nm. Energy-dispersive X-ray spectroscopy (EDS) depicted formation of pure IONPs with 69.84% Fe and 30.16% O2. X-ray diffractometry (XRD) and attenuated total reflectance-fourier transform infrared (ATR-FTIR) validate the crystalline structure, chemical analysis detect the presence of various biomolecular fingerprints in the as synthesized IONPs. UV-visible absorption spectroscopy depicts activity of IONPs under visible light. Thermo-gravimetric analysis (TGA) displayed thermal loss of organic capping around 500°C and confirmed their stabilization. The biosynthesized IONPs revealed promising results in callus induction, shoot regeneration and root induction of chickpea plants. Both chickpea varieties Punjab-Noor 09 and Bittle-98 explants, Embryo axes (EA) and Embryo axes plus adjacent part of cotyledon (EXC) demonstrated dose-dependent response. Among all explants, EXC of Punjab-Noor variety showed the highest callogenesis (96%) and shoot regeneration frequency (88%), while root induction frequency was also increased to 83%. Iron content was quantified in regenerated chickpea varieties through inductively coupled plasma-optical emission spectrometry. The quantity of iron is significantly increased in Punjab-Noor regenerated plants (4.88 mg/g) as compare to control treated plants (2.42 mg/g). We found that IONPs enhance chickpea growth pattern and keep regenerated plantlets infection free by providing an optimum environment for rapid growth and development. Thus, IONPs synthesized through green process can be utilized in tissue culture studies in other important recalcitrant legumes crops.

scholarly journals Green synthesis of iron oxide nanoparticles using Platanus orientalis leaf extract for antifungal activity

2019 ◽  
Vol 8 (1) ◽  
pp. 38-45 ◽  
Author(s):  
Henam Sylvia Devi ◽  
Muzaffar Ahmad Boda ◽  
Mohammad Ashraf Shah ◽  
Shazia Parveen ◽  
Abdul Hamid Wani
Keyword(s):  
Electron Microscopy ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Leaf Extract ◽  
Oxide Nanoparticles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Platanus Orientalis ◽  
Oxide Particles

Abstract In this report, aqueous phase green synthesis of iron oxide nanoparticle utilizing Platanus orientalis is elucidated for the first time. The phytoconstituents of the P. orientalis leaf extract serve a dual role as reducing and capping agent during the fabrication of iron oxide nanoparticles. The role of the leaf extract in the synthesis of iron oxide has been briefly demonstrated in this work. The tailored iron oxide particles were characterized using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray analysis, infrared spectroscopy, ultraviolet-visible spectroscopy, and dynamic light scattering technique. Nonetheless, X-ray diffraction pattern reveals the mixed phase nature of the ensuing iron oxide, i.e. α-Fe2O3 and γ-Fe2O3. The spherical oxide particles have an average diameter of 38 nm as determined from transmission electron microscopy. Infrared spectroscopy results confirmed the stabilization of iron oxide nanoparticles by the phytochemicals present in the leaf extract. Iron oxide nanoparticles show significant antifungal activity against Aspergillus niger and Mucor piriformis, employed as model fungi, but found to be more active toward M. piriformis.

scholarly journals Organ Metallome Processed with Chemometric Methods Enable the Determination of Elements that May Serve as Markers of Exposure to Iron Oxide Nanoparticles in Male Rats

2020 ◽  
Vol 198 (2) ◽  
pp. 602-616
Author(s):  
Marzena Rugiel ◽  
Agnieszka Drozdz ◽  
Katarzyna Matusiak ◽  
Zuzanna Setkowicz ◽  
Krzysztof Klodowski ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Total Reflection ◽  
Male Rats ◽  
Oxide Nanoparticles ◽  
Chemometric Methods ◽  
X Ray ◽  
Discriminant Analyses ◽  
Elemental Homeostasis

Abstract The systemic influence of iron oxide nanoparticles on the elemental homeostasis of key organs was examined in male rats. In tissues taken at different intervals from nanoparticles injection, the dynamics of elemental changes was analyzed. The organ metallome was studied using total reflection X-ray fluorescence. The obtained data were processed with advanced cluster and discriminant analyses—to classify the tissues according to their organs of origin and to distinguish accurately the nanoparticle-treated and normal rats. Additionally, in the case of liver and heart, it was possible to determine the elements of highest significance for different treatments, which may serve as markers of exposure to iron oxide nanoparticles.

scholarly journals Utilization of Neem Leaf Extract on Biosynthesis of Iron Oxide Nanoparticles

Molecules ◽  
2019 ◽  
Vol 24 (20) ◽  
pp. 3803 ◽  
Author(s):  
Nur Diyana Syazwani Zambri ◽  
Nurul Izza Taib ◽  
Famiza Abdul Latif ◽  
Zakiah Mohamed
Keyword(s):  
Electron Microscope ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Magnetite Nanoparticles ◽  
Leaf Extract ◽  
Xrd Analysis ◽  
Oxide Nanoparticles ◽  
Spectra Analysis ◽  
X Ray ◽  
Average Size

The present work reports the successful synthesis of biosynthesized iron oxide nanoparticles (Fe3O4-NPs) with the use of non-toxic leaf extract of Neem (Azadirachta indica) as a reducing and stabilizing agent. The successful synthesis was confirmed by infrared spectra analysis with strong peak observed between 400–600 cm−1 that corresponds to magnetite nanoparticles characteristics. X-ray diffraction (XRD) analysis revealed that iron oxide nanoparticles were of high purity with crystalline cubic structure phases in nature. Besides, the average size of magnetite nanoparticles was observed to be 9–12 nm with mostly irregular shapes using a transmission electron microscope (TEM) and was supported by field emission scanning electron microscope (FESEM). Energy dispersive X-ray analysis shown that the elements iron (Fe) and oxygen (O) were present with atomic percentages of 33.29% and 66.71%, respectively. From the vibrating sample magnetometer (VSM) analysis it was proven that the nanoparticles exhibited superparamagnetic properties with a magnetization value of 73 emu/g and the results showed superparamagnetic behavior at room temperature, suggesting potential applications for a magnetic targeting drug delivery system.

Green synthesis of iron oxide nanoparticles by aqueous leaf extract of Daphne mezereum as a novel dye removing material

2018 ◽  
Vol 124 (5) ◽  
Author(s):  
Nasrin Beheshtkhoo ◽  
Mohammad Amin Jadidi Kouhbanani ◽  
Amir Savardashtaki ◽  
Ali Mohammad Amani ◽  
Saeed Taghizadeh
Keyword(s):  
Iron Oxide ◽  
Green Synthesis ◽  
Iron Oxide Nanoparticles ◽  
Leaf Extract ◽  
Oxide Nanoparticles ◽  
Aqueous Leaf Extract
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