Green synthesis of silver nanoparticles using aqueous extracts of three Sideritis species from Turkey and evaluations bioactivity potentials

2021 ◽  
Vol 21 ◽  
pp. 100426
Author(s):  
Ramazan Ceylan ◽  
Ayse Demirbas ◽  
Ismail Ocsoy ◽  
Abdurrahman Aktumsek
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Aqueous Extracts

scholarly journals Green Synthesis and Antibacterial Activity Studies of Silver Nanoparticles from the Aqueous Extracts of Euphorbia hirta

2020 ◽  
Vol 14 (1) ◽  
pp. 301-306
Author(s):  
Bennet Rohan D ◽  
◽  
Raji P ◽  
Divya Kumar M ◽  
Ratna Geethika Gandham ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Green Synthesis ◽  
Aqueous Extracts ◽  
Euphorbia Hirta

Evaluation of Cytotoxic Effect of Silver Nanoparticles (AgNP) Synthesized from Phlebodium aureum (L.) J. Smith Extracts

2020 ◽  
Vol 21 ◽  
Author(s):  
Johnson Marimuthu ◽  
Shibila Thangaiah ◽  
Amutha Santhanam ◽  
Vidyarani George
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Large Scale ◽  
Color Change ◽  
Nanoparticle Synthesis ◽  
Xrd Analysis ◽  
Nano Particles ◽  
Synthesis Methods ◽  
Aqueous Extracts ◽  
Ft Ir

Background:: Chemical synthesis methods are adverse in the medicinal field as they produce toxic in the surface whereas green synthesis provide advancement as well as they are cost effective, environment friendly, can be easily scaled up for large scale synthesis. Silver and silver nanoparticles have an important application in the medical industry such as tropical ointments which are used to prevent infection against burn and open wounds. There is no report on the green synthesis from Phlebodium aureum (L.) J. Smith. Objective:: The present study was aimed to synthesize silver nano-particles using Phlebodium aureum (L.) J. Smith extracts by green approach and to screen their cytotoxicity. Methods:: The synthesized AgNPs of P. aureum were characterized by FT-IR, SEM and XRD. The cytotoxicity of the aqueous extracts and AgNPs of P. aureum were determined. Results:: The silver nanoparticle synthesis was confirmed by color change from yellow to dark brown and absorption peak at 460 nm. FT-IR analysis confirmed the capping by proteins and other metabolites. XRD analysis confirmed the existence of silver nanaoparticles with a peak at 46.253°. The dose dependent cytotoxicity was observed in the aqueous and silver nanoparticles of P.aureum. Conclusion:: The present study gave a simple and cheap route to synthesize the AgNPs using aqueous extracts of P. aureum. The studied extracts of P. aureum can be considered as a promising candidate for a plant-derived anti-tumour compound.

scholarly journals Synergic effect of aqueous extracts of Ocimum sanctum and Trigonella foenum-graecum L on the in situ green synthesis of silver nanoparticles and as a preventative agent against antibiotic-resistant food spoiling organisms

RSC Advances ◽  
2022 ◽  
Vol 12 (3) ◽  
pp. 1425-1432
Author(s):  
Mohammad Changez ◽  
Mohammad Faiyaz Anwar ◽  
Said Al-Ghenaime ◽  
Sumeet Kapoor ◽  
Rayya Al Balushi ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Ocimum Sanctum ◽  
Aqueous Extracts ◽  
Capping Agent ◽  
Synergic Effect ◽  
Antibiotic Resistant ◽  
Trigonella Foenum Graecum ◽  
Trigonella Foenum Graecum L

Combining Ocimum sanctum and Trigonella foenum-graecum L leaf water extracts synergistically act as a reducing and capping agent for the synthesis of narrow polydisperse silver nanoparticles with controlled sizes depending on the precursor (AgNO3) concentration.

scholarly journals SYNTHESIS AND SIZE ESTIMATION OF SILVER NANOPARTICLES, BY REDUCTION WITH AQUEOUS EXTRACTS OF CALYCES LEAVES AND SEEDS OF HIBISCUS SABDARIFFA LINN: PROMOTION OF GREEN SYNTHESIS

2021 ◽  
Vol 38 (3) ◽  
Author(s):  
Franklin Pacheco-Coello ◽  
◽  
◽  
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Hibiscus Sabdariffa ◽  
Aqueous Extracts ◽  
Size Estimation ◽  
20 Nm

La síntesis de nanopartículas de plata (AgNPs) ha tenido un impacto positivo en las ciencias biomédicas, gracias a sus diversas potencialidades bilógicas, entre las que destacan su actividad antimicrobiana e interacción in vitro con diversas drogas quimioterapéuticas. El estudio tuvo como objetivo la síntesis de AgNPs, empleando extractos acuosos de cálices, hojas y semillas de un cultivo orgánico de Hibiscus sabdariffa y una solución de nitrato de plata (AgNO3). A cada extracto se le determinó la concentración de compuestos fenólicos totales y flavonoides, por los métodos de Folin-Ciocalteu y Marinova respectivamente, esto con el propósito de garantizar la calidad y contenido de compuestos con capacidad reductora. Se optimizaron las condiciones de síntesis de AgNPs, referente a volumen y concentración de AgNO3, volumen de extracto (cálices, hojas y semillas), pH, tiempo y temperatura de calentamiento, empleando el programa estadístico StatGraphics. Los análisis arrojaron una concentración de 17.42±0.12 mg GAE/g (cálices), 9.03±0.91 mg GAE/g (hojas) y 11.32±0.36 mg GAE/g (semillas). Los picos máximos de absorción se obtuvieron a 424 nm para todos los tres extractos, con absorbancias de 1.5240±0.32 =30- 32 nm (AgNPs- cálices), 0.5674±0.24=12-14 nm (AgNPs-hojas) y 0.7641±0.18=18-20 nm (AgNPs-semillas) . Los hallazgos del estudio están relacionados con la variación de compuestos fenólicos en las diferentes partes de H. sabdariffa, lo que condiciona el rendimiento de síntesis de AgNPs.el presente estudio representa un valioso aporte en la “Síntesis Verde”, representando el primer estudio en Venezuela en la que se sintetizan AgNPs a parir de H. sabdariffa

scholarly journals How Temperature and Photosynthetically Active Radiation Impact the Green Synthesis of Silver Nanoparticles Using Aqueous Extracts of Mentha Leaves?

2021 ◽  
Vol 12 (4) ◽  
pp. 4597-4602
Keyword(s):  
Silver Nanoparticles ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Green Synthesis ◽  
Photosynthetically Active Radiation ◽  
Hydrodynamic Diameter ◽  
Synthesis Methods ◽  
Aqueous Extracts ◽  
Polydisperse Suspension ◽  
Active Radiation

Green synthesis highlights sustainable methods to produce silver nanoparticles (AgNPs). Here, extracts from fresh and lyophilized Mentha leaves produced AgNPs when performing reactions in the dark at 25ºC or 75ºC; also under photosynthetically active radiation (PAR) at 25ºC aiming to compare hydrothermal and photochemical methods. AgNPs formation was spectrophotometrically monitored and characterized by dynamic light scattering (DLS) and Zeta potential (ZP). The most polydisperse AgNPs suspension was synthesized at 25ºC (dark), presenting polydispersity index (PdI) of 0.574±0.061, and exhibited the lowest hydrodynamic diameter (HD) of 44.34±1.60 nm. In contrast, the highest HD was 80.15±2.88 nm to AgNPs produced at 25ºC with PAR which exhibited ZP of -27.8±0.7 mV. The lowest polydisperse suspension was produced at 75ºC (dark), presenting PdI of 0.369±0.009 and ZP of -12.8±0.6 mV. Concluding, we compared reliable green synthesis’ methods to determine which would efficiently produce AgNPs using Mentha leaves.

Synergistic Antibacterial Efficacy of Biogenic Synthesized Silver Nanoparticles using Ajuga bractosa with Standard Antibiotics: A Study Against Bacterial Pathogens

2020 ◽  
Vol 21 (3) ◽  
pp. 206-218 ◽  
Author(s):  
Sadia Nazer ◽  
Saiqa Andleeb ◽  
Shaukat Ali ◽  
Nazia Gulzar ◽  
Tariq Iqbal ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Bacterial Pathogens ◽  
Potential Effect ◽  
Innovative Technology ◽  
Multi Drug Resistance ◽  
Phytochemical Screening ◽  
Cell Proliferation Inhibition ◽  
Agar Well Diffusion Assay ◽  
Scanning Electron

Background: Multi-drug resistance in bacterial pathogens is a major concern of today. Green synthesis technology is being used to cure infectious diseases. Objectives: The aim of the current research was to analyze the antibacterial, antioxidant, and phytochemical screening of green synthesized silver nanoparticles using Ajuga bracteosa. Methods: Extract of A. bracteosa was prepared by maceration technique. Silver nanoparticles were synthesized using A. bracteosa extract and were confirmed by UV-Vis spectrophotometer, Scanning Electron Microscope (SEM) and Fourier Transform Infrared Spectroscopy (FTIR). The antibacterial, anti-biofilm, cell proliferation inhibition, TLC-Bioautography, TLC-Spot screening, antioxidant, and phytochemical screening were also investigated. Results: UV-Vis spectrum and Scanning electron microscopy confirmed the synthesis of green nanoparticles at 400 nm with tube-like structures. FTIR spectrum showed that functional groups of nanoparticles have a role in capping and stability of AgNP. Agar well diffusion assay represented the maximum antibacterial effect of ABAgNPs against Escherichia coli, Klebsiella pneumoniae, Streptococcus pyogenes, Staphylococcus aureus, and Pseudomonas aeruginosa at 0.10 g/mL concentration compared to ABaqu. Two types of interactions among nanoparticles, aqueous extract, and antibiotics (Synergistic and additive) were recorded against tested pathogens. Crystal violet, MTT, TLC-bio-autography, and spot screening supported the findings of the antibacterial assay. Highest antioxidant potential effect in ABaqu was 14.62% (DPPH) and 13.64% (ABTS) while 4.85% (DPPH) and 4.86% (ABTS) was recorded in ABAgNPs. Presence of phytochemical constituents showed pharmacological importance. Conclusion: It was concluded that green synthesis is an innovative technology in which natural products are conjugated with metallic particles and are used against infectious pathogens. The current research showed the significant use of green nanoparticles against etiological agents.

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