Enhancement of the stability of silver nanoparticles synthesized using aqueous extract of <i>Diospyros discolor</i> Willd. leaves using polyvinyl alcohol

Ardani, H.; Imawan, Cuk; Handayani, Windri; Djuhana, Dede; Harmoko, Adhi; Fauzia, Vivi

doi:10.1088/1757-899x/188/1/012056

Cited by 73 publications

(48 citation statements)

References 16 publications

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“…The silver nanoparticles have zeta potential value of −16 mV ( Figure 5(b) ) which falls within the range that is considered to be relatively stable (±10–20 mV) [ 30 ]. The negative value of the zeta potential indicates that there is repulsion among the particles which could also enhance the stability of the particles [ 31 ].…”

Section: Resultsmentioning

confidence: 99%

Boswellia dalzielii-Mediated Silver Nanoparticles Inhibited Acute Myeloid Leukemia (AML) Kasumi-1 Cells by Inducing Cell Cycle Arrest

Adebayo

Usman

Shittu

et al. 2020

Bioinorganic Chemistry and Applications

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Background. Acute myeloid leukemia (AML) persists to be a major health problem especially among children as effective chemotherapy to combat the disease is yet to be available. Boswellia dalzielii is a well-known herb that is traditionally used for treatment and management of many diseases including degenerative diseases. In this study, silver nanoparticles were synthesized from the phytochemicals of B. dalzielii stem bark aqueous extract. The silver nanoparticles were characterized by carrying out Fourier Transform Infrared (FTIR) spectroscopy, Energy Filtered Scanning Electron Microscopy (FESEM), X-ray diffraction, and Dynamic Light Scattering (DLS) analyses. Antioxidant capacity of the nanoparticles was evaluated using 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay, and the antiproliferative effect of the nanoparticles on Kasumi-1 leukemia cells was investigated using PrestoBlue assay. Flow cytometry analysis was performed to observe the effect of the nanoparticles on the leukemia cell cycle progression. Results. Our findings revealed that the synthesized silver nanoparticles were formed from electrons of the plant phytochemicals which include aromatic compounds, ethers, and alkynes. FESEM analysis revealed that the sizes of the nanoparticles range from 12 nm to 101 nm; however, DLS analysis estimated a larger average size of the nanoparticles (108.3 nm) because it measured the hydrodynamic radii of the nanoparticles. The zeta potential of the nanoparticles was −16 nm, and the XRD pattern of the nanoparticles has distinct peaks at 38.02°, 42.94°, 64.45°, 77.20°, and 81.47°, which is typical of face-centered cubic (fcc) structure of silver. The Trolox Equivalence Antioxidant Capacity (TEAC) of the nanoparticles was estimated to be 300.91 μM Trolox/mg silver nanoparticles. The nanoparticles inhibited Kasumi-1 cell proliferation. The half minimal inhibitory concentrations (IC50s) that inhibited Kasumi-1 cell proliferation are 49.5 μg/ml and 13.25 μg/ml at 48 and 72 hours, respectively. The nanoparticles induced cell cycle arrest in the Kasumi-1 cells at S (5% increase) and G2/M (3% increase) phases. Conclusion. The nanoparticles synthesized from the stem bark extract of B. dalzielii inhibit the growth of Kasumi-1 leukemia cells by activating cell cycle arrest; thus, they are potential antileukemic agents.

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Section: Resultsmentioning

confidence: 99%

Boswellia dalzielii-Mediated Silver Nanoparticles Inhibited Acute Myeloid Leukemia (AML) Kasumi-1 Cells by Inducing Cell Cycle Arrest

Adebayo

Usman

Shittu

et al. 2020

Bioinorganic Chemistry and Applications

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“…A PDI value of less than 0.1 infers a highly monodispersed nanoparticles system [47,48]. A PDI value higher than 0.4 is indicative of highly polydispersed nanoparticles system while the PDI value ranging from 0.1 to 0.4 shows a moderately dispersed nanoparticles system [47,48]. The obtained PDI value for DPLE-and HEL-mediated composites is 0.240 and 0.411, respectively.…”

Section: Zeta Potential (Zp) and Polydispersity Index (Pdi) Studiesmentioning

confidence: 93%

Section: Zeta Potential (Zp) and Polydispersity Index (Pdi) Studiesmentioning

confidence: 99%

“…The PDI value can be used to articulate the distribution pattern of nanoparticles in a system [47,48]. A PDI value of less than 0.1 infers a highly monodispersed nanoparticles system [47,48]. A PDI value higher than 0.4 is indicative of highly polydispersed nanoparticles system while the PDI value ranging from 0.1 to 0.4 shows a moderately dispersed nanoparticles system [47,48].…”

Section: Zeta Potential (Zp) and Polydispersity Index (Pdi) Studiesmentioning

confidence: 99%

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Preparation of Silver/Chitosan Nanofluids Using Selected Plant Extracts: Characterization and Antimicrobial Studies against Gram-Positive and Gram-Negative Bacteria

et al. 2020

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Chitosan/silver nanofluids were prepared using Phoenix dactylifera (DPLE) or Rumex vesicarius (HEL) extracts as the reducing agent, characterized using Fourier-transform infrared spectroscopy (FTIR), ultraviolet–visible (UV-vis), X-ray diffraction (XRD), and transmission electron microscope (TEM). The antimicrobial effect of the nanofluids against Gram positive, Bacillus licheniformis, Staphylococcus haemolyticus, Bacillus cereus, and Micrococcus luteus, and Gram-negative Pseudomonas aeruginosa, Pseudomonas citronellolis, and Escherichia coli bacteria has been studied. The nanoparticles were polydispersed in the chitosan matrix and are highly stable. The zeta potential of the silver nanoparticles in DPLE- and HEL-mediated composites is +46 mV and +56 mV, respectively. The FTIR results reveal that the free carboxylate groups in the plant biomaterial took part in stabilization process. HEL is a stronger reducing agent than DPLE and nanoparticles generated with HEL are smaller (8.0–36 nm) than those produced with DPLE (10–43 nm). DPLE- and HEL-mediated composites effectively inhibit the growth of the studied bacteria but HEL-mediated composite exhibited higher effect. The higher antimicrobial activity of HEL-mediated composite is linked to the smaller nanoparticles. The foregoing results indicate that HEL extract can be used in the green production of potential antimicrobial chitosan/silver nanofluids for biomedical and packaging applications.

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“…These results are superior to the work published by Velgosova O. and co-workers [22], where the biologically synthesized AgNPs using algae Parachlorella kessleri stored in the dark at room temperature showed better long-term stability but weak particle agglomeration was observed at approximately the 100th day. Furthermore, the stability of our biologically synthesized AgNPs using LHE can be stored without chemical stabilizer such as polyvinyl alcohol (PVA) [23]. Figure 6 shows FTIR spectra of pure LHE and dried powder obtained from AgNPs colloidal solutions at the different LHE concentrations.…”

Section: Antimicrobial Activitymentioning

confidence: 99%

Green synthesis and stabilization of silver nanoparticles using Lysimachia foenum-graecum Hance extract and their antibacterial activity

Chartarrayawadee

Charoensin

Saenma

et al. 2020

Green Processing and Synthesis

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AbstractThe Lysimachia foenumgraecum Hance extract (LHE) was used for silver nanoparticles (AgNPs) synthesis. In this study, the herbal plant of Lysimachia foenumgraecum Hance (LH) was extracted with deionized water and we are the first to successfully use LHE as reducing and stabilizing agents for the green synthesis of AgNPs. The concentration of LHE used in this study was in the range of 0.003 to 1.0 wt%. Aqueous colloidal solutions of AgNPs reduced and stabilized by LHE show long-term stability due to the steric stabilization effect. This can be confirmed by zeta potential measurements which afforded values approximately of 0 mV, indicating the steric stability of AgNPs colloidal solutions synthesized by LHE. Furthermore, the obtained AgNPs colloidal solutions show superior antibacterial effect to gram-positive bacteria (Staphylococcus aureus) comparing to Chloramphenicol (positive control). AgNPs with LHE 0.003 wt% affords the highest antibacterial effect to S. aureus showing an inhibition zone diameter of 19.08 ± 0.67 mm; which is superior to Chloramphenicol.

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Enhancement of the stability of silver nanoparticles synthesized using aqueous extract of Diospyros discolor Willd. leaves using polyvinyl alcohol

Cited by 73 publications

References 16 publications

Boswellia dalzielii-Mediated Silver Nanoparticles Inhibited Acute Myeloid Leukemia (AML) Kasumi-1 Cells by Inducing Cell Cycle Arrest

Boswellia dalzielii-Mediated Silver Nanoparticles Inhibited Acute Myeloid Leukemia (AML) Kasumi-1 Cells by Inducing Cell Cycle Arrest

Preparation of Silver/Chitosan Nanofluids Using Selected Plant Extracts: Characterization and Antimicrobial Studies against Gram-Positive and Gram-Negative Bacteria

Green synthesis and stabilization of silver nanoparticles using Lysimachia foenum-graecum Hance extract and their antibacterial activity

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