Green synthesis of silver nanoparticles using seed extract of Calendula officinalis in liquid phase

Baghizadeh, Amin; Ranjbar, Shahla; Gupta, Vinod K.; Asif, Mohammad; Pourseyedi, Shahram; Karimi, M.; Mohammadinejad, Reza

doi:10.1016/j.molliq.2015.03.029

Cited by 95 publications

(48 citation statements)

References 66 publications

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“…Plant mediated green synthesis has a great advantage over other biological methods as the synthesis is user-friendly and the synthesis is rapid (Ahmed et al, 2015). Plant-based substrates used for synthesis of NPs include extracts from leaves Banerjee et al, 2014), fruits (Jain et al, 2009), seeds (Baghizadeh et al, 2015;Bar et al, 2009), peels (Abdelmonem and Amin, 2014), latex (Bar et al, 2009) and roots (Suresh et al, 2014). Plant extracts have been reported to serve both as reducing and capping agents during the synthesis of NPs (Bar et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Coconut inflorescence sap mediated synthesis of silver nanoparticles and its diverse antimicrobial properties

Rajesh

Muralikrishna

Nair

et al. 2019

Preprint

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Green synthesis of nanoparticles (NPs) involves the use of diverse extracts of biological origin as substrates to synthesize nanoparticles and can overcome the hazards associated with chemical 2 methods. Coconut inflorescence sap, which is unfermented phloem sap obtained by tapping of coconut inflorescence, is a rich source of sugars and secondary metabolites. In this study, coconut inflorescence sap was used to synthesize silver nanoparticles (AgNPs). We have initially undertaken metabolomic profiling of coconut inflorescence sap from West Coast Tall cultivar to delineate its individual components. Secondary metabolites constituted the major portion of the inflorescence sap along with sugars, lipids and, peptides. The concentration of silver nitrate, inflorescence sap and incubation temperature for synthesis of AgNPs were optimized. Incubating the reaction mixture at 40ºC was found to enhance AgNP synthesis. The AgNPs synthesized were characterized using UV-Visible spectrophotometry, X-Ray Diffraction (XRD), Fourier Transform Infrared spectroscopy (FTIR), Field Emission Scanning Electron Microscopy (FESEM) and Transmission Electron Microscopy (TEM). Antimicrobial property of AgNP was tested in tissue culture of arecanut (Areca catechu L.) where bacterial contamination (Bacillus pumilus) was a frequent occurrence. Significant reduction in the contamination was observed when plantlets were treated with aqueous solutions of 0.01, 0.02 and 0.03% of AgNPs for one hour. Notably, treatment with AgNPs did not affect growth and development of the arecanut plantlets. Cytotoxicity of AgNPs was quantified in HeLa cells. Viability (%) of HeLa cells declined significantly at 10 ppm concentration of AgNP and complete mortality was observed at 60 ppm. Antimicrobial properties of AgNPs synthesized from inflorescence sap were also evaluated and confirmed in human pathogenic bacteria viz., Salmonella sp., Vibrio parahaemolyticus, and Escherichia coli. The study concludes that unfermented inflorescence sap, with above neutral pH, serves as an excellent reducing agent to synthesize AgNPs from Ag+.3

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Section: Introductionmentioning

confidence: 99%

Coconut inflorescence sap mediated synthesis of silver nanoparticles and its diverse antimicrobial properties

Rajesh

Muralikrishna

Nair

et al. 2019

Preprint

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“…AgNP synthesis has been evaluated in different extracts, including Medicago sativa [13], Ulva flexuosa [14], Achillea biebersteinii [15], Moringa oleifera [16], Calendula officinalis [17], Peganum harmala [18], Green Tea [19], Pistacia atlantica [20], olive [21], Aloe vera [22], and Coriandrum Sativum [23]. We developed a simple, rapid, and green method to synthesize AgNPs, using MMT and Tarragon leaf extract as both a reducing and capping agent under normal atmospheric conditions in the batch method in this study.…”

Section: Introductionmentioning

confidence: 99%

Biosynthesis of silver nanocomposite with Tarragon leaf extract and assessment of antibacterial activity

et al. 2018

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The aqueous extract of Tarragon, as a reducing agent, was used to synthesize silver-montmorillonite (MMT) nanocomposite (Ag-MMT-NPs) in the batch method. The leaf extract and metal solution concentrations were optimized to improve Ag-MMT-NPs synthesis in 48 h. For characterizing the nanocomposite, powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Transmission electron microscopy (TEM), and UV-Vis spectroscopy were performed. The peak was observed at 437 nm on the UV-Vis spectrum, showing the surface plasmon resonance of Ag-MMT-NPs. Using XRD analysis, the crystalline nature and purity of Ag-MMT-NPs were confirmed. FTIR was used to evaluate specific functional groups, causing a reduction in silver nitrate during Ag-MMT-NPs formation. According to TEM, the average particle size was 25.12 nm in AgNPs. The nanocomposite showed antibacterial properties against Gram-negative and Gram-positive bacteria (Escherichia coli and Staphylococcus aureus).

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“…The characteristic peak of grape seed extract mediated synthesis, found at 440 nm, has also been reported by many researchers working with AgNPs. This absorption band was observed for AgNPs synthesised with Mukia maderaspatana, Kedrostis foetidissima and Cayratia pedata 28 , Euphorbia helioscopia Linn 29 , seed extract of Calendula officinalis 30 , seed extract of Vigna radiate 31 and Elettaria cardamomom seed extract 32 .…”

Section: Fig 2: Absorption Spectrum Of Silver Nanobioconjugates Ofmentioning

confidence: 85%

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2016

IJPSR

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ABSTRACT:The seeds of Vitis vinifera have been shown to have antioxidant, anticancer and antimicrobial properties due to the presence of rich bioactive phenolic components like resveratrol. The research deals with the synthesis of silver nanobioconjugates from the methanolic extract of grape seeds and the pure compound resveratrol. The presence of resveratrol was confirmed by HPLC analysis in methanolic extract of various parts of grape fruits such as skin, pulp and seeds of two varieties (pink and black). As higher amount of resveratrol was present in the seed extract of pink grapes, it was selected for the silver nanobioconjugate synthesis. Various conditions were applied to influence the rapid reduction of Ag + to Ag ο , such as microwave heating, water bath heating, sunlight exposure and incubation at 37 ο C for nanobioconjugate synthesis. The reduction of silver ions was confirmed by color changes, adsorption spectroscopy (280-800nm) and percentage yield. Among the four different methods, sunlight exposure proved to be rapid in the synthesis and the yield of nanobioconjugates was also high. Therefore, this method was chosen for the synthesis of silver nanobioconjugates using resveratrol. The bioactivity of the synthesized silver nanoconjugates were also evaluated through antimicrobial activity. The results showed that the resveratrol in grape seeds extract can act as good reductant and stabilizer for the silver nanobioconjugate synthesis, which also exhibits potent bioactivity.

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Green synthesis of silver nanoparticles using seed extract of Calendula officinalis in liquid phase

Cited by 95 publications

References 66 publications

Coconut inflorescence sap mediated synthesis of silver nanoparticles and its diverse antimicrobial properties

Coconut inflorescence sap mediated synthesis of silver nanoparticles and its diverse antimicrobial properties

Biosynthesis of silver nanocomposite with Tarragon leaf extract and assessment of antibacterial activity

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