Green synthesis of silver nanoparticles using leaf extract from Tabebuia roseoalba and T. pentaphylla

Metal nanoparticles are nanostructures that can be applied to biotechnology because they present different biological activities. Among them, the silver nanoparticles (AgNPs) are known to present antimicrobial activity allowing their application in several areas such as medicine and industry. The biological synthesis of AgNPs is ecologically correct and advantageous techniques. The objective of this work was to evaluate the synthesis of AgNps through the green synthesis using extracts of leaves of Tabebuia roseoalba and T. pentaphylla grown in vivo and in vitro. The nanoparticle synthesis solution was colorimetrically evaluated, and the nanoparticles were physically characterized. The results obtained demonstrate that both extracts of both Tabebuia species tested are able to synthesize AgNPs, however only when cultured under in vivo conditions. These data suggest that photosynthesis under natural conditions promotes the production of metabolites that are essential to green synthesis.

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Green synthesis of silver nanoparticles using Melia azedarach leaf extract and their antifungal activities: In vitro and in vivo

Materials Chemistry and Physics ◽

10.1016/j.matchemphys.2020.122898 ◽

2020 ◽

Vol 248 ◽

pp. 122898 ◽

Cited By ~ 11

Author(s):

Siwar Jebril ◽

Raoudha Khanfir Ben Jenana ◽

Chérif Dridi

Keyword(s):

Silver Nanoparticles ◽

Green Synthesis ◽

Leaf Extract ◽

Melia Azedarach ◽

Antifungal Activities

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Green Synthesis of Gold Nanoparticles from Vitex negundo Leaf Extract to Inhibit Lipopolysaccharide-Induced Inflammation Through In Vitro and In Vivo

Journal of Cluster Science ◽

10.1007/s10876-019-01661-1 ◽

2019 ◽

Vol 31 (2) ◽

pp. 463-477 ◽

Cited By ~ 5

Author(s):

Ningaraju Sunayana ◽

Munawer Uzma ◽

Rudra Prasad Dhanwini ◽

Mellappa Govindappa ◽

Harischandra Sripathy Prakash ◽

...

Keyword(s):

Gold Nanoparticles ◽

Green Synthesis ◽

Leaf Extract ◽

Vitex Negundo

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Green Synthesis of Reduced Graphene oxide Nanosheets Using Leaf Extract of Lantana camara and Its In-Vitro Biological Activities

Journal of Cluster Science ◽

10.1007/s10876-020-01814-7 ◽

2020 ◽

Author(s):

Nathiya Thiyagarajulu ◽

Sivakumar Arumugam

Keyword(s):

Graphene Oxide ◽

Green Synthesis ◽

Reduced Graphene Oxide ◽

Leaf Extract ◽

Biological Activities ◽

Lantana Camara ◽

Graphene Oxide Nanosheets ◽

Reduced Graphene

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Viburnum nervosum Leaf Extract Mediated Green Synthesis of Silver Nanoparticles: A Viable Approach to Increase the Efficacy of Anticancer Drug

Anti-Cancer Agents in Medicinal Chemistry ◽

10.2174/1871520620999201001201230 ◽

2020 ◽

Vol 20 ◽

Author(s):

Irfana Zahoor ◽

Farhat Jan ◽

Ujjawal Sharma ◽

Kiran K. Sahu ◽

Amita Sharma ◽

...

Keyword(s):

Drug Delivery ◽

Silver Nanoparticles ◽

Green Synthesis ◽

Silver Nitrate ◽

Leaf Extract ◽

Analytical Techniques ◽

Therapeutic Interventions ◽

A431 Cells ◽

Anti Cancer

Background:: There is an urgent need to devise improved alternatives for the efficient delivery of drugs to develop improved therapeutic interventions against cancers. Nanotechnology based drug delivery vehicles are in-use with obvious issues of toxicity and bio-distribution. Therefore, green synthetic routes are being deployed to replace the conventional nanoparticle formulations for effective drug delivery aiming at developing interventional strategies against cancer. Objective:: A simple, viable and fast approach was used for the green synthesis of silver nanoparticles (AgNPs) using aqueous leaf-extract of Viburnum nervosum (VN) and to explore the anti-cancer potential of the crude extract of VN. Methods:: Silver NPs were synthesized by reacting silver nitrate (AgNO3) with leaf extract of VN. Various analytical techniques were used to characterize the AgNPs. Finally, the anti-cancer potential of VN was observed when delivered through AgNPs. Results:: The surface plasmon spectra for AgNPs exhibited absorbance peak at 445 nm, and Fourier-Transform Infrared Spectroscopy investigation revealed presence of biomolecules acting as an effective reducing and capping agent for converting silver nitrate to AgNPs. Further, our results suggest the spherical size of synthesized AgNPs ranging from 12-17 nm. Moreover, in vitro studies conducted for VN extract with breast (MCF-7) and epidermal carcinoma (A431) cells showed biocompatibility. Conclusion:: Doxorubicin loaded AgNPs documented an increased bioavailability of drug compared to the free drug, suggesting the use of AgNPs as “novel drug delivery vectors”.

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The green synthesis, characterization, and evaluation of the biological activities of silver nanoparticles synthesized from Leptadenia reticulata leaf extract

Applied Nanoscience ◽

10.1007/s13204-014-0293-6 ◽

2014 ◽

Vol 5 (1) ◽

pp. 73-81 ◽

Cited By ~ 56

Author(s):

M. Kumara Swamy ◽

K. M. Sudipta ◽

K. Jayanta ◽

S. Balasubramanya

Keyword(s):

Silver Nanoparticles ◽

Green Synthesis ◽

Leaf Extract ◽

Biological Activities

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Green Synthesis of Reduced Graphene Nanosheets Using Leaf Extract of Tridax procumbens and its Potential In-Vitro Biological Activities

Proceedings International ◽

10.33263/proceedings21.093093 ◽

2020 ◽

Vol 2 (1) ◽

pp. 93

Keyword(s):

Graphene Oxide ◽

Green Synthesis ◽

Reduced Graphene Oxide ◽

Leaf Extract ◽

Spectroscopic Analysis ◽

Graphene Nanosheets ◽

Biological Activities ◽

Tridax Procumbens ◽

Reduced Graphene

Graphene oxide nanoparticles has found immense application in bio therapeutics owing to its biocompatibility and enhanced effectiveness in drug delivery. The present study investigates the green synthesis of reduced graphene oxide using leaf extract using Tridax procumbens and testing its in-vitro biological activities. The biosynthesized reduced graphene oxide (rGO) was characterized by various spectroscopic and microscopic techniques. UV-vis spectroscopic analysis primarily detected the shift in the absorption peak from 232 to 287 nm confirming the reduction of TP-rGO. FTIR spectra of TP-rGO confirmed effective deoxygenation of GO assisted by bioactive molecules present in the leaf extract. Raman spectroscopic analysis identified successful reduction of GO through the presence of D band at 1329 cm-1 and G band at 1577 cm-1. XRD spectra of TP-rGO showed diffraction peak 2θ at 25o confirming the presence of reduced GO. SEM analysis revealed the presence of graphene nanosheets appearing as large aggregated structure. The bioreduced rGO showed anti-oxidant effect against DPPH radical observed in concentration dependent manner. The TP-rGO nanosheets exhibited bactericidal effect against gram positive bacteria: B.subitils (18 mm) and S. epidermis (9 mm) and gram negative bacteria: E.coli (14 mm) and P. aeruginosa (6 mm) at 100 µg/ml confirming the enhanced anti-bacterial effects of TP-rGO against gram positive pathogens. Hence, it is highlighted that leaf extract of Tridax procumbens act as green reducing agent for the successful biosynthesis of rGO nanosheets demonstrating potential in-vitro biological activities and has great scope in the preparation of nano drugs for the treatment of various diseases.

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Ganoderma applanatum-mediated green synthesis of silver nanoparticles: Structural characterization, and in vitro and in vivo biomedical and agrochemical properties

Arabian Journal of Chemistry ◽

10.1016/j.arabjc.2017.12.002 ◽

2019 ◽

Vol 12 (7) ◽

pp. 1108-1120 ◽

Cited By ~ 18

Author(s):

Sudisha Jogaiah ◽

Mahantesh Kurjogi ◽

Mostafa Abdelrahman ◽

Nagabhushana Hanumanthappa ◽

Lam-Son Phan Tran

Keyword(s):

Silver Nanoparticles ◽

Green Synthesis ◽

Structural Characterization ◽

Ganoderma Applanatum ◽

Agrochemical Properties

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Radiation Synthesis of Silver Nanoparticles/Chitosan for Controlling Leaf Fall Disease on Rubber Trees Causing by Corynespora cassiicola

Journal of Nanomaterials ◽

10.1155/2018/7121549 ◽

2018 ◽

Vol 2018 ◽

pp. 1-9 ◽

Cited By ~ 4

Author(s):

Le Thi An Nhien ◽

Nguyen Duc Luong ◽

Le Thi Thuy Tien ◽

Le Quang Luan

Keyword(s):

Silver Nanoparticles ◽

Leaf Extract ◽

Fungal Growth ◽

Corynespora Cassiicola ◽

Sem Images ◽

Inhibition Effect ◽

Foliar Treatment ◽

Inhibitory Efficiency

Silver nanoparticles (AgNPs) were successfully prepared by γ-rays irradiation of solution containing 1.0–10 mM of silver nitrate and 1% chitosan. The optical characteristics and particles sizes of AuNPs were determined by UV-Vis spectra and TEM images, respectively. The size of AgNPs increased by the increase of silver concentration or the decrease of chitosan molecular weight in irradiated solution. The in vitro test showed that AgNPs inhibited the growth of Corynespora cassiicola on rubber-leaf extract media with the inhibitory efficiency of 52.1–100% by treatment of AgNPs with particle size from 15 to 5 nm, respectively. In addition, antifungal activity was found to reach ~100% by the addition of 90 ppm AgNPs. The in vivo foliar treatment of AgNPs on 9-month-old rubber plants showed that the treatment with 2.5–12.5 ppm AgNPs on tested plants after inoculation by spraying with C. cassiicola spores enhanced the rate of non-disease-infected plants from 6.0 to 93.3%, respectively, compared to the untreated control. The inhibition effect of AgNPs on fungal growth of C. cassiicola mycelial was also elucidated via SEM images. The AgNPs/chitosan synthesized by γ-irradiation is potentially promising to use as a fungicidal product for treating C. cassiicola, a serious pathogen fungus on rubber trees.

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