Antioxidant, antimicrobial and cytotoxic activities of silver and gold nanoparticles synthesized using Plumbago zeylanica bark

Velammal, Subramanian Priya; Devi, Thangavel Akkini; Amaladhas, T. Peter

doi:10.1007/s40097-016-0198-x

Cited by 99 publications

(47 citation statements)

References 46 publications

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“…The intensity of the SPR bands increased and shifted to wavelength (500 nm) when the concentration of the rhaminolipid increased from (4 to 6×10 -3 w/v), (Fig.8). This reduces in the intensity of the SPR band perhaps because of the aggregation of nanoparticles, which is in concurrence with previous study of Velammal et al (42). (Fig 9).…”

Section: Effect Of Rhaminolipid Concentrationsupporting

confidence: 93%

Eco-Friendly Synthesis of Silver Nanoparticles by Using Green Method: Improved Interaction and Application in Vitro and in Vivo.

Hayder¹

2020

Iraqi J. Agric. Sci.

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The present study was aimed to biosynthesis of silver nanoparticles by using rhaminolipid produced from local isolate Pseudomonas aeruginosa as reducing and stabilizing agent. Silver nanoparticles (AgNPs) synthesized by green method have shown several applications such as biomedical, anticancer, bio sensing, catalysis etc. Characterization study of purified bioemulsifier using thin layer chromatography (TLC) was demonstrated that the biosurfactant contains mono, and di- rhamnolipid with Rf values of 0.86 and 0.36 respectively. Optimization results of biosynthesis silver nanoparticles were revealed that an increasing in intensity of Surface Plasmon Resonance (SPR) bands of nanoparticles with shifting at wavelength (400 nm). Also optimum synthesis of AgNPs was at pH 5, Temperature 40℃, reaction time 5 minutes with concentration of rhaminolipid as reducing agents (2×10-3w/v) and Silver ion concentration (6×10-3 mol/L). The result of X-ray diffraction was indicated that the size of silver nanoparticles observed was 38 nm and show relatively stable peak at -23.2 mV. Finally, the minimum inhibitory concentration of Ag NPs against human pathogenic bacteria obtained at concentration (1mg/ml) for both gram negative and gram-positive bacteria. The results of anti-inflammatory effects of Ag NPs obviously, cleared that the infection of test animals treated with AgNPs were completely healed after 6 days of treatment, while the animals treated with fucidin (as control) not exhibited any healing in the infection.

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Section: Effect Of Rhaminolipid Concentrationsupporting

confidence: 93%

Eco-Friendly Synthesis of Silver Nanoparticles by Using Green Method: Improved Interaction and Application in Vitro and in Vivo.

Hayder¹

2020

Iraqi J. Agric. Sci.

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“…The result obtained after 4 days were calculated for every petri dishes by noticing change in color and increase in number of fronds. Statistical analysis was done by finding the value of FI50 (Velammal et al 2016). For % growth inhibition the following formula was used for calculations:…”

Section: Insecticidal Activitymentioning

confidence: 99%

Polymers Encapsulated Aspirin Loaded Silver Oxide Nanoparticles: Synthesis, Characterization and its Bio-Applications

Ahmad¹,

Rashid²,

Jalil³

et al. 2019

JSM

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Simple, facile and cost effective approach is used for the synthesis of Aspirin based silver oxide nano-particles (SONPs) by chemical wet method. The synthesized SONPs were loaded with Aspirin to form Asp-SONPs, which was confirmed with the help of UV spectroscopy. Characterization was done using spectroscopy techniques FTIR, SEM, TEM and XRD. Antimicrobial assay of Asp-SONPs were carried out against six bacterial strains (E. coli, Protues, Vibrio, Citrobacter, Enterobacter, S. aureus) and fungal strains (Curvularia, Alternaria, Rhizopus, Aspergillus, Helmithosporium, Paecilomyces) by well diffusion method which confirmed its potential application as an antimicrobial agent. Asp-SONPs-PVA also displayed highest insecticidal activity against both tested insects (Tribolium casterium and Callosobruchus chinensis) having LC 50 value of 15.917, and 37.6365 and highest percent mortality at 1000 ppm was 67%, and 73%, respectively. PVA coated SONPs displayed encouraging phytotoxicity when exposed to allopathic, where Asp-SONPs coated PVA give excellent anthelmintic activity by killing or paralyzing all the species (earthworm) at 1000 ppm. ABSTRAKPendekatan yang mudah dan berkesan digunakan untuk mensintesis Aspirin berasaskan nanozarah perak beroksida (SONPs) dengan menggunakan kaedah kimia basah. SONPs tersintesis dengan Aspirin untuk membentuk Asp-SONPs, yang dikenal pasti dengan menggunakan Spektroskopi UV. Pencirian telah dilakukan menggunakan teknik spektroskopi iaitu FTIR, SEM, TEM dan XRD. Cerakinan antimikrob Asp-SONPs telah dijalankan terhadap enam strain bakteria (E. coli, Protues, Vibrio, Citrobacter, Enterobacter, S. aureus) dan strain kulat (Curvularia, Alternaria, Rhizopus, Aspergillus, Helmithosporium, Paecilomyces) dengan menggunakan kaedah resapan yang mengesahkan aplikasinya yang berpotensi sebagai agen antimikrob. Asp-SONPs-PVA juga menunjukkan aktiviti insektisid yang tertinggi terhadap kedua-dua serangga yang diuji (Tribolium casterium dan Callosobruchus chinensis) yang mempunyai nilai LC 50 iaitu 15.917 dan 37.6365 dan peratus kematian tertinggi pada 1000 ppm masing-masing adalah 67% dan 73%. SONPs bersalut PVA menunjukkan kefitotoksikan menggalakkan apabila terdedah kepada alopati dengan Asp-SONPs bersalut PVA memberi aktiviti antelmin cemerlang dengan membunuh atau melumpuhkan semua spesies (cacing tanah) pada 1000 ppm.

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“…At the end of 1 hour, the reduction of the DPPH radical was determined by measuring the absorbance at 517 nm. The free Radical Scavenging Activity was calculated by using the following equation: % RSA = [(absorbance of control -absorbance of sample)/absorbance of control] ×100 [9] Were, absorbance of control was the DPPH solution and absorbance of sample was the absorbance of the solution when the ZnONPs is added with the DPPH.…”

Section: E Antioxidant Activitymentioning

confidence: 99%

Bioengineered Zinc Oxide Nanoparticles for Anti-Oxidant Applications

2019

IJRTE

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Zinc oxide nanoparticles find its versatile application in medicine and industry when compared with other metal nanoparticles. The present study focuses on biogenic synthesis of Zinc Oxide nanoparticles (ZnONPs) using lemon juice extract. Lemon juice extracts contains natural alkaloids and flavonoids which acts as reducing agent for the synthesis of nanoparticles. The synthesized zinc oxide nanoparticle is characterized by Scanning Electron Microscopy (SEM) and FTIR. FTIR results showed the presence of functional groups which represents ZnONPs and reducing groups responsible for the reduction. The SEM observation reveals the synthesized ZnONPs are cube shaped. The obtained nanoparticle was further studied for toxicity using zebrafish embryos. Toxicity results suggested that the toxicity is dose dependent. Malformations in the embryos such as yolk sac edema and twisted tail were seen in higher concentrations. The antioxidant activity of the synthesized ZnONPs was carried out using DPPH assay. Results implied that the antioxidant activity was also concentration dependent.

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Antioxidant, antimicrobial and cytotoxic activities of silver and gold nanoparticles synthesized using Plumbago zeylanica bark

Cited by 99 publications

References 46 publications

Eco-Friendly Synthesis of Silver Nanoparticles by Using Green Method: Improved Interaction and Application in Vitro and in Vivo.

Eco-Friendly Synthesis of Silver Nanoparticles by Using Green Method: Improved Interaction and Application in Vitro and in Vivo.

Polymers Encapsulated Aspirin Loaded Silver Oxide Nanoparticles: Synthesis, Characterization and its Bio-Applications

Bioengineered Zinc Oxide Nanoparticles for Anti-Oxidant Applications

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