Green synthesis of tea Ag nanocomposite hydrogels via mint leaf extraction for effective antibacterial activity

Jayaramudu, Tippabattini; Varaprasad, Kokkarachedu; Raghavendra, Gownolla Malegowd; Sadiku, Rotimi; Raju, K. Mohana; John, Amalraj

doi:10.1080/09205063.2017.1338501

Cited by 24 publications

(10 citation statements)

References 53 publications

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“…The antibacterial activity of SeNPs was performed using the modified disc method (Jayaramudu et al 2013(Jayaramudu et al , 2017. First, Luria-Bertani (LB) medium was prepared by mixing 10 g of sodium chloride, 10 g of peptone and 5 g of yeast extract powder in 1 L ultrapure water, then the pH of the medium was adjusted to 7.…”

Section: Antibacterial Analysis Of Senpsmentioning

confidence: 99%

“…The diameters of antibacterial region were 0.05 mm and 1.2 mm by adding 10 uL and 20 uL SeNPs, respectively. According to previous literatures and the Standard Antibacterial methods (SNV 195920-1992), samples exhibiting more than 1-mm microbial inhibition zone can be considered to have a good antibacterial effect (Raghavendra et al 2013;Jayaramudu et al 2017). Therefore, the biosynthesized SeNPs could be effective in destroying the Gram-positive bacteria such as Arthrobacter sp.…”

Section: Antibacterial Activitymentioning

confidence: 99%

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Characterization of biogenic selenium nanoparticles derived from cell-free extracts of a novel yeast Magnusiomyces ingens

et al. 2019

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A facile one-pot and effective green process for biogenic selenium nanoparticles (SeNPs) was obtained using the cellfree extracts of a novel yeast Magnusiomyces ingens LH-F1. The corresponding absorption peak of SeNPs was observed at ~ 560 nm by UV-vis spectrophotometer. In the present study, SeO 2 2 mM, protein 500 mg L −1 and pH 7 were preferable to the biosynthesis of SeNPs. The effects of pH, SeO 2 concentration and protein concentration on the synthesis process were different. Transmission electron microscopy image exhibited that all the SeNPs were spherical and quasi-spherical with the diameters mainly distributed in 70-90 nm (average particles size was 87.82 ± 2.71 nm). X-ray diffraction suggested that the nanoparticles were composed of standard hexagonal crystalline Se with high purity. Fourier transform infrared spectroscopy indicated that some biomolecules such as hydroxyl, carboxyl and amino groups in the yeast cell-free extracts might be involved in the formation of SeNPs. Analyses of sodium dodecyl sulfate-polyacrylamide gel electrophoresis revealed that two proteins with low molecular weight approximately ~ 16 and ~ 21 kDa were detected on the surface of SeNPs and in the extracts, which could play the role of natural stabilizers and confer stability to synthesized SeNPs; whereas, unbound proteins on the SeNPs surface could act as reducing agents. Antibacterial analysis showed that the SeNPs could inhibit Arthrobacter sp. W1 (Gram positive) but not E. coli BL21 (Gram negative), which could provide reference for antimicrobial application of biogenic SeNPs.

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Section: Antibacterial Analysis Of Senpsmentioning

confidence: 99%

Section: Antibacterial Activitymentioning

confidence: 99%

Characterization of biogenic selenium nanoparticles derived from cell-free extracts of a novel yeast Magnusiomyces ingens

et al. 2019

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“…Hydrogel has a role in the covering the wound as a temporary barrier, avoiding water loss and bacterial infection due to its antibacterial properties [ 9 , 18 ]. Silver nanoparticles significantly improve the antibacterial effect of hydrogel without cytotoxicity [ 19 , 20 , 21 , 22 , 23 , 24 ]. Moreover, hydrogel has the capability to absorb the excess wound exudate with moisturizing efficacy [ 9 , 18 ].…”

Section: Discussionmentioning

confidence: 99%

Early and Late Efficacy on Wound Healing of Silver Nanoparticle Gel in Males after Circumcision

Rubilotta

Trabacchin

Soldano

et al. 2020

JCM

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We evaluate the early and late safety and efficacy of silver nanoparticle (AgNPs) in wound healing after circumcision. This multicenter prospective comparative non-randomized observational study compares wound dressing with AgNPs (group A) vs. gentamicin cream (group B). Follow-up included objective evaluation at 10 and 30 days by the Southampton Scoring System (SSS) and Stony Brook Scar Evaluation Scale (SBSES). We enrolled 392 males: 194 in group A, and 198 in group B. At 10 days follow-up, in group A, the SSS scale was grade 1 in 49.5% and grade 2 in the remaining; meanwhile, in group B, grade 1 was in 58%, grade 2 in 34.3%, and grade 4 in 7.6%. At 30 days follow-up, grade 1 healing was 97.4% and 98.4% in group A and B, respectively. At 10 days follow-up, the mean SBSES score was 3.58 and 3.69 in group A and B, respectively; while at 30 days follow-up, 4.81 and 4.76 in group A and B, respectively. Only in group B did 7.6% of males have antibiotic therapy due to pus discharge. No patients needed surgical wound revision. AgNPs led to a late but safer healing, they were non-inferior to the antibiotic cream wound dressing efficacy, and they avoided pus discharge and the need for oral antibiotics due to their polymer material.

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“…Particularly important modifying agents are natural ones such as e.g. plant extracts [19]. However, substances of synthetic origin such as e.g.…”

Section: Introductionmentioning

confidence: 99%

Physicochemical Investigations of Hydrogels Containing Gold Nanoparticles Designed for Biomedical Use

Głąb

Kudłacik–Kramarczyk

Drabczyk

et al. 2021

JCME

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Currently, many investigations are being performed to develop dressing materials with a positive effect on the wound healingprocess. In general, innovative dressings should ensure wound exudate absorption, constitute an external barrier limiting thepossibility of wound contamination and, importantly, also provide therapeutic properties. This work is focused on obtainingmaterials with potential use as dressings for treatment of difficult-to-heal wounds. The synthesis methodology of acrylic hydrogelsmodified with selected modifiers, i.e. arabic gum, nanogold, bee pollen and chamomile extract, was developed. Next, thesorption properties of the materials were determined as well as their behavior during the incubation in fluids imitating theenvironment of the human body. Additionally, the impact of such an incubation on their structure was evaluated by FT-IR spectroscopy.It was proved that the modifiers affected the sorption properties of hydrogels, i.e. samples with additives showed evenapprox. 2.5-fold lower swelling ability. In turn, incubation of hydrogels in simulated body fluids did not cause any rapid changesin pH, which may indicate the biocompatibility of the tested materials with the tested fluids. Thus, it may be concluded that thedeveloped materials show great application potential for biomedical purposes and may be subjected to more advanced studiessuch as cytotoxicity assessments towards selected cell lines.

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Green synthesis of tea Ag nanocomposite hydrogels via mint leaf extraction for effective antibacterial activity

Cited by 24 publications

References 53 publications

Characterization of biogenic selenium nanoparticles derived from cell-free extracts of a novel yeast Magnusiomyces ingens

Characterization of biogenic selenium nanoparticles derived from cell-free extracts of a novel yeast Magnusiomyces ingens

Early and Late Efficacy on Wound Healing of Silver Nanoparticle Gel in Males after Circumcision

Physicochemical Investigations of Hydrogels Containing Gold Nanoparticles Designed for Biomedical Use

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