scholarly journals Synergistic broad-spectrum antibacterial activity of Hypoxis hemerocallidea-derived silver nanoparticles and streptomycin against respiratory pathobionts

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Oluwole S. Aremu ◽  
T. Qwebani-Ogunleye ◽  
Lebogang Katata-Seru ◽  
Zimbili Mkhize ◽  
John F. Trant
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Broad Spectrum ◽  
Average Diameter ◽  
Dual Function ◽  
Streptococcus Pneumonia ◽  
Tract Infections ◽  
20 Nm ◽  
Potential Tool ◽  
Hypoxis Hemerocallidea

AbstractRespiratory tract infections arise due to the introduction of microbes into the airway, disrupting the normal, healthy, complex interdependent microbiome. The selective disruption of this community can be either beneficial or dangerous. Nanoparticles are a potential tool for modifying this population. Coated silver nanoparticles (AgNPs) were synthesized using ethanolic extracts of Hypoxis hemerocallidea (EEHH), a Southern African plant used extensively in traditional medicine and the source of many bioactive secondary metabolites. The room temperature reaction between silver nitrate and EEHH forms largely spherical AgNPs with an average diameter of 6–20 nm. These nanoparticles show similar levels of antibacterial activity as the broad-spectrum antibiotic streptomycin against Bacillus cereus, Streptococcus pneumonia, Escherichia coli, Pseudomonas aeuroginosa, and Moraxella catarrhalis. However, the AgNPs synergistically increase the antibacterial activity of streptomycin when they are applied in combination (30–52%). AgNPs are reiterated to be promising dual-function antibiotics, synergistically enhancing activity while also acting as delivery agents for small molecules.

scholarly journals Enhanced Antibacterial Performance and Cytocompatibility of Silver Nanoparticles Stabilized by Cellulose Nanocrystal Grafted with Chito-Oligosaccharides

Materials ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1339 ◽  
Author(s):  
Xiaohui Ni ◽  
Jinru Wang ◽  
Yiying Yue ◽  
Wanli Cheng ◽  
Dong Wang ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Human Body ◽  
Average Diameter ◽  
Cell Compatibility ◽  
Hydrolysis Method ◽  
Antibacterial Performance ◽  
One Step ◽  
Thermal Stability Of ◽  
Better Than

The agglomeration of silver nanoparticles (AgNPs) results in poor antibacterial performance, and the accumulation of silver in the human body threatens human health. Preparing a matrix is a technique worth considering as it not only prevents the aggregation of AgNPs but also reduces deposition of AgNPs in the human body. In this paper, carboxy-cellulose nanocrystals (CCNC) were prepared by a simple one-step acid hydrolysis method. Chito-oligosaccharides (CSos) were grafted onto the surface of CCNC to form CSos-CCNC composite nanoparticles. CCNC and CSos-CCNC were used as stabilizers for deposing AgNPs and two types of complexes—AgNPs-CCNC and AgNPs-CSos-CCNC—were obtained, respectively. The influence of the two stabilizer matrices—CCNC and CSos-CCNC—on the morphology, thermal behavior, crystal structure, antibacterial activity, and cell compatibility of AgNPs-CCNC and AgNPs-CSos-CCNC were examined. The results showed that the AgNPs deposited on the CSos-CCNC surface had a smaller average diameter and a narrower particle size distribution compared with the ones deposited on CCNC. The thermal stability of AgNPs-CSos-CCNC was better than that of AgNPs-CCNC. AgNPs did not affect the crystalline structure of CCNC and CSos-CCNC. The antibacterial activity of AgNPs-CSos-CCNC was better than that of AgNPs-CCNC based on antibacterial studies using Escherichia coli, Staphylococcus aureus, and Klebsiella pneumoniae. The cytotoxicity of AgNPs-CSos-CCNC was remarkably lower than that of AgNPs-CCNC.

scholarly journals Green Synthesis and Characterization of Silver Nanoparticles Using Citrullus lanatus Fruit Rind Extract

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Michael Ndikau ◽  
Naumih M. Noah ◽  
Dickson M. Andala ◽  
Eric Masika
Keyword(s):  
Silver Nanoparticles ◽  
Citrullus Lanatus ◽  
Average Diameter ◽  
Reactant Ratio ◽  
Oxidation Peak ◽  
Vis Spectroscopy ◽  
Environmentally Safe ◽  
Wide Scale ◽  
20 Nm ◽  
Fruit Rind

The wide-scale application of silver nanoparticles (AgNPs) in areas such as chemical sensing, nanomedicine, and electronics has led to their increased demand. Current methods of AgNPs synthesis involve the use of hazardous reagents and toxic solvents. There is a need for the development of new methods of synthesizing AgNPs that use environmentally safe reagents and solvents. This work reports a green method where silver nanoparticles (AgNPs) were synthesized using silver nitrate and the aqueous extract of Citrullus lanatus fruit rind as the reductant and the capping agent. The optimized conditions for the AgNPs synthesis were a temperature of 80°C, pH 10, 0.001 M AgNO3, 250 g/L watermelon rind extract (WMRE), and a reactant ratio of 4 : 5 (AgNO3 to WMRE). The AgNPs were characterized by Ultraviolet-Visible (UV-Vis) spectroscopy exhibiting a λmax at 404 nm which was consistent with the spectra of spherical AgNPs within the wavelength range of 380–450 nm, and Cyclic Voltammetry (CV) results showed a distinct oxidation peak at +291 mV while the standard reference AgNPs (20 nm diameter) oxidation peak occurred at +290 mV, and Transmission Electron Microscopy (TEM) revealed spherical shaped AgNPs. The AgNPs were found to have an average diameter of 17.96±0.16 nm.

Actinobacterial-Mediated Fabrication of Silver Nanoparticles and Their Broad Spectrum Antibacterial Activity Against Clinical Pathogens

2020 ◽  
Vol 20 (5) ◽  
pp. 2902-2910 ◽  
Author(s):  
Poongazhalselvan Devagi ◽  
Thirunavukarasu Chitrikha Suresh ◽  
Revathi Vedachalam Sandhiya ◽  
Mohan Sairandhry ◽  
Selvaraj Bharathi ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Broad Spectrum ◽  
Fourier Transforms ◽  
Salmonella Typhi ◽  
X Ray Diffraction ◽  
Vibrio Cholera ◽  
X Ray ◽  
The Face ◽  
Average Size

The aim of this study is to fabricate silver nanoparticles (AgNPs) using actinobacterial strain isolated from lawn soil. Among six isolates, one isolate named AS-3 was potent in AgNPs production; hence it was identified deployed on gene sequence (16S rRNA) as Streptomyces spongiicola AS-3 (99.8% similarity). Actinobacteria mediated synthesized AgNPs were analyzed using UV-visible spectroscopy (UV-Vis), which showed a Surface Plasmon Resonance (SPR) at around λ = 443 nm. Scanning electron microscopy (SEM) analyses revealed the occurrence of predominant spherical AgNPs with polydispersed, with an average size of 22 nm. Energy-dispersive X-ray spectroscopy (EDS) established the existence of silver component. While the Fourier transforms infrared spectroscopy (FTIR) evidenced the occurrence of proteins as the bio reduction and topping agents over the AgNPs. X-ray diffraction (XRD) examination confirmed the obtained AgNPs were in crystalline planes of the face centric cubic. The S. spongiicola AgNPs antibacterial activity showed a broad spectrum antibacterial action against Staphylococcus aureus, Bacillus cereus, Escherichia coli, Pseudomonas aeruginosa, Vibrio cholera, Shigella sp., and Salmonella typhi were confirmed by disc diffusion test and MIC analysis.

scholarly journals Antimicrobial Potential of Biosynthesized Silver Nanoparticles by Aaronsohnia factorovskyi Extract

Molecules ◽  
2020 ◽  
Vol 26 (1) ◽  
pp. 130
Author(s):  
Fatimah Al-Otibi ◽  
Reem A. Al-Ahaidib ◽  
Raedah I. Alharbi ◽  
Rana M. Al-Otaibi ◽  
Gadah Albasher
Keyword(s):  
Staphylococcus Aureus ◽  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Antifungal Activity ◽  
Plant Extracts ◽  
Fusarium Solani ◽  
Large Scale ◽  
Average Diameter ◽  
Inhibition Zone ◽  
Diffusion Method

The green biosynthesis of nanoparticles by plant extracts is an attractive and promising technique for medicinal applications. In the current study, we chose one of the daisy plants, Aaronsohnia factorovskyi (which grows in the Najd region, Saudi Arabia), to investigate its anti-microbial efficacy, in combination with silver nanoparticles. The biosynthesized nanoparticles were evaluated for antibacterial activity against Staphylococcus aureus, Bacillussubtilis (Gram-positive), Pseudomonas aeruginosa, and Escherichia coli, (Gram-negative) using the disc diffusion method, while the antifungal activity was assessed against Fusarium oxysporum, Fusarium solani, Helminthosporiumrostratum, and Alternariaalternata. The potential phytoconstituents of the plant extracts were identified by Fourier-transform infrared spectroscopy (FT-IR) techniques, the Field emission scanning electron microscopy (FE-SEM), Chromatography/Mass Spectrometry (GC-MS) techniques, and Zeta potential analysis. The current study revealed the ability of the tested plant extract to convert silver ions to silver nanoparticles with an average diameter of 104–140 nm. Biogenic Aaronsohnia factorovskyi-silver nanoparticles (AF-AgNPs) showed significant antibacterial activity against Staphylococcus aureus with inhibition zone diameter to 19.00 ± 2.94 mm, and antifungal activity against Fusarium solani, which reduced the growth of fungal yarn to 1.5 mm. The innovation of the present study is that the green synthesis of NPs, which is simple, cost-effective, provides stable nano-materials, and can be an alternative for the large-scale synthesis of silver nanoparticles.

scholarly journals Antibacterial Finishing of Tencel/Cotton Nonwoven Fabric Using Ag Nanoparticles-Chitosan Composite

2012 ◽  
Vol 7 (2) ◽  
pp. 155892501200700 ◽  
Author(s):  
Youbo Di ◽  
Qingshan Li ◽  
Xupin Zhuang
Keyword(s):  
Aqueous Solution ◽  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Ambient Temperature ◽  
Ag Nanoparticles ◽  
Nonwoven Fabric ◽  
Air Permeability ◽  
Microcrystalline Chitosan ◽  
20 Nm ◽  
Chitosan Composite

A silver nanoparticles-chitosan composite was prepared using a microcrystalline chitosan gelatinous water dispersion at ambient temperature and its aqueous solution was applied to the antibacterial finishing of Tencel/cotton nonwoven fabric. The size distribution of silver nanoparticles (AgNPs) was between 4 to 20 nm showed good stability in aqueous solution. The finished nonwoven fabric showed excellent water absorption ability, air permeability and antibacterial activity against E.coli.

scholarly journals In Situ Deposition of Green Silver Nanoparticles on Urinary Catheters under Photo-Irradiation for Antibacterial Properties

Processes ◽  
2020 ◽  
Vol 8 (12) ◽  
pp. 1630
Author(s):  
Fueangfahkan Chutrakulwong ◽  
Kheamrutai Thamaphat ◽  
Sukon Tantipaibulvut ◽  
Pichet Limsuwan
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Urinary Tract ◽  
Urinary Tract Infections ◽  
Urinary Catheter ◽  
Silver Content ◽  
High Price ◽  
Urinary Catheters ◽  
Tract Infections ◽  
Durian Rind

Urinary tract infections, especially catheter-associated urinary tract infections (CAUTIs), are the most common type of nosocomial infections. Patients with chronic indwelling urinary catheters have a higher risk of infection due to biofilm formation on the urinary catheter surface. Therefore, in this work, a novel, cost-effective antimicrobial urinary catheter was developed using green technology. Silver nanoparticles (AgNPs) synthesized from Mon Thong durian rind waste were used as an antimicrobial agent for the prevention of infection. Flavonoids, phenolic compounds, and glucose extracted from durian rind were used as a reducing agent to reduce the Ag+ dissolved in AgNO3 solution to form non-aggregated AgNPs under light irradiation. The AgNPs were simultaneously synthesized and coated on the inner and outer surfaces of silicone indwelling urinary catheters using the dip coating method. The results showed that the antimicrobial urinary catheter fabricated using a 0.3 mM AgNO3 concentration and 48 h coating time gave the highest antibacterial activity. The as-prepared spherical AgNPs with an average diameter of 9.1 ± 0.4 nm formed on catheter surfaces in a monolayer approximately 1.3 µm thick corresponding to a 0.712 mg/cm2 silver content. The AgNP layer was found to damage and almost completely inhibit the growth of Escherichia coli cells with antibacterial activity by 91%, equivalent to the commercial, high-price antimicrobial urinary catheter. The cumulative amount of silver released from the coated catheter through artificial urine over 10 days was about 0.040 µg/mL, which is less than the silver content that causes tissue and organ toxicity at 44 µg/mL. Thus, we concluded that the developed antimicrobial urinary catheter was useful in reducing the risk of infectious complications in patients with indwelling catheters.

scholarly journals UJI DAYA HAMBAT EKSTRAK HEKSANA RIMPANG LENGKUAS MERAH (Alpinia purpurata K. Schum) TERHADAP BAKTERI Klebsiella pneumoniae ISOLAT URIN PADA INFEKSI SALURAN KEMIH

PHARMACON ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 47
Author(s):  
Firdaus Alamri ◽  
Fatimawali Fatimawali ◽  
Imam Jayanto
Keyword(s):  
Antibacterial Activity ◽  
Urinary Tract ◽  
Klebsiella Pneumoniae ◽  
Urinary Tract Infections ◽  
Average Diameter ◽  
Diffusion Method ◽  
Polar Extracts ◽  
Tract Infections ◽  
Alpinia Purpurata ◽  
Paper Disc

ABSTRACT Galangal rhizome traditionally used to treat diseases. Red galangal rhizome contains flavonoid compounds, which are thought to be able to inhibit the growth of bacteria. Urinary tract infections are infections that occur due to the proliferation of microorganisms in the urinary tract. This study aims to determine the antibacterial activity of non-polar extracts of red galangal (Alpinia purpurata K.Schum) against the growth of Klebsiella pneumoniae bacterial urine isolates in urinary tract infections. Extraction was carried out by maceration method using n-hexane solvent. The antibacterial activity was testing using the paper disc diffusion method (Kirby and Bauer diffusion). The results showed that the inhibitory activity of extracts with concentrations of 80%, 40%, 20%, and 10% of the average diameter of the clear zone were 11.03 mm, 8.75 mm, 7.1 mm and 6.03 mm. Shows that the inhibition at 80% concentration is strong, while at 40% concentration, 20% is moderate and at 10% concentration is moderate. Based on this study it can be concluded that the non-polar extract of red galangal can inhibit the bacteria Klebsiella pneumoniae urine isolate in urinary tract infections. Keywords: Red Galangal Rhizome, Antibacterial, Inhibition  ABSTRAK Rimpang lengkuas secara tradisional digunakan untuk mengobati penyakit. Rimpang Lengkuas merah mengandung senyawa golongan flavonoid yang diduga mampu menghambat pertumbuhan bakteri. Infeksi saluran kencing merupakan infeksi yang terjadi akibat berkembangbiaknya mikroorganisme di dalam saluran kemih. Penelitian ini bertujuan untuk mengetahui aktivitas antibakteri dari ekstrak non-polar rimpang lengkuas merah (Alpinia purpurata K.Schum) terhadap pertumbuhan bakteri Klebsiella pneumoniae isolat urin pada infeksi saluran kemih. Ekstraksi dilakukan dengan metode maserasi menggunakan pelarut n-heksan. Pengujian aktivitas antibakteri menggunakan metode difusi dengan cakram kertas (difusi Kirby dan Bauer). Hasil penelitian menunjukkan bahwa daya hambat ekstrak dengan konsentrasi 80%, 40%, 20%, dan 10% rata-rata diameter  zona beningnya 11,03 mm, 8,75 mm, 7,1 mm, dan 6,03 mm. Menunjukkan bahwa daya hambat pada konsentrasi 80% termasuk kuat, sedangkan pada  konsentrasi  40%,20% termasuk sedang dan pada konsentrasi 10% termasuk  sedang. Berdasarkan penelitian ini dapat disimpulkan bahwa ekstrak non-polar lengkuas merah dapat menghambat bakteri Klebsiella pneumoniae isolat urin pada infeksi saluran kemih. Kata Kunci: Rimpang Lengkuas Merah, Antibakteri, Daya Hambat

scholarly journals Highly Antibacterial Activity Against Methicillin-resistant Staphylococcus aureus of Silver Nanoparticles Synthesized by Citrus maxima Peel Extract

2021 ◽  
Author(s):  
Thu Ha Bui ◽  
Ngoc Dai Nghia Tran ◽  
Phung Anh Nguyen ◽  
Nhat Linh Duong ◽  
Van Minh Nguyen ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Average Diameter ◽  
Reducing Agent ◽  
Face Centered Cubic ◽  
Methicillin Resistant ◽  
Vis Spectroscopy ◽  
Citrus Maxima

Abstract A cost-effective and green technique was performed for the synthesis of silver nanoparticles (AgNPs) from a plant resource using Citrus maxima peel (CMP) extract as a reducing agent. The formation of AgNPs was confirmed by UV-Vis Spectroscopy at the wavelength range of 400−500 nm. The optimized conditions for the AgNPs synthesis using CMP extract as a reducing agent were determined. At these conditions, the X-ray diffraction (XRD) and the high-resolution transmission electron microscopy (HRTEM) results revealed the face-centered cubic structure of AgNPs had a highly crystalline with the particle size in a range of 10−20 nm. The Fourier transform infrared spectroscopy (FT-IR) demonstrated the presence of flavonoid, terpenoid, phenolic, and glycosides in phytochemical compositions of CMP extract which can act as the reducing agents for AgNPs formation. The antibacterial effect of the AgNPs was evaluated against Methicillin-resistant Staphylococcus aureus (MRSA) by implementing the minimum inhibitory concentration (MIC), minimum batericidal concentration (MBC), and the zone of inhibition tests. The AgNPs exhibited effective antibacterial activity against bacteria with an average diameter of inhibition zones of 11.7 mm, the MIC of 8.27 µg/mL, and the MBC of the 16.54 µg/mL.

Phytosynthesis of silver nanoparticles using Mangifera indica flower extract as bioreductant and their broad-spectrum antibacterial activity

2019 ◽  
Vol 88 ◽  
pp. 102970 ◽  
Author(s):  
Fuad Ameen ◽  
P. Srinivasan ◽  
T. Selvankumar ◽  
S. Kamala-Kannan ◽  
S. Al Nadhari ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Broad Spectrum ◽  
Mangifera Indica ◽  
Flower Extract

scholarly journals UJI AKTIVITAS ANTIBAKTERI EKSTRAK RIMPANG LENGKUAS MERAH (Alpinia purpurata K. Schum) TERHADAP BAKTERI Klebsiella pneumonia ISOLAT URIN PADA PENDERITA INFEKSI SALURAN KEMIH

PHARMACON ◽  
2019 ◽  
Vol 8 (4) ◽  
pp. 982
Author(s):  
Novanda S. Puasa ◽  
Fatimawali Fatimawali ◽  
Weny Wiyono
Keyword(s):  
Antibacterial Activity ◽  
Klebsiella Pneumoniae ◽  
Average Diameter ◽  
Modern Medicine ◽  
Klebsiella Pneumonia ◽  
Clear Zone ◽  
Activity Test ◽  
Tract Infections ◽  
Antibacterial And Antifungal ◽  
Alpinia Purpurata

ABSTRACTRed galangal rhizome is a plant that has various properties including as an antibacterial and antifungal. Red galangal rhizome in addition to containing essential oils also contains flavonoid, phenol and terpenoid compounds. Red galangal is also used as a basic ingredient of modern medicine. The content of flavonoid compounds which are thought to inhibit the growth of bacteria. This study aims to determine the antibacterial activity of red galangal rhizome extract (Alpinia purpurata K.Schum) against the growth of Klebsiella pneumoniae bacteria of urine isolates in urinary tract infections patients. Red galangal rhizome plants were extracted by maceration method using 96% ethanol solvent. Antibacterial activity test was carried out using the disc and wells method. The results showed that the red galangal rhizome extract has antibacterial activity against the bacteria Klebsiella pneumoniae. In the disc method for concentrations of 80%, 60%, 40%, 20% and 10% the average diameter of the clear zone is 13 mm, 12.3 mm, 10.6 mm, 10.5 mm and 9.8 mm. The ability of antibacterial activity is included in the strong category because it has an inhibition of 10-20 mm. In the method of wells the average diameter of the clear zone is 15.6 mm, 14.6 mm, 13.6 mm, 13 mm and 11.3 mm. The ability of antibacterial activity in the well method of concentrations of 80%, 60%, 40%, 20% and 10% is included in the strong category because the average diameter of inhibition is 10-20 mm.Keywords: Alpinia purpurata K. Schum, Klebsiella pneumoniae, Red Galangal Rhizome ABSTRAKRimpang Lengkuas merah merupakan tanaman yang memiliki berbagai khasiat di antaranya sebagai antibakteri dan antijamur. Rimpang Lengkuas merah selain mengandung minyak atsiri juga mengandung golongan senyawa flavonoid, fenol dan terpenoid. Lengkuas Merah juga digunakan sebagai bahan dasar obat-obatan moderen. Kandungan senyawa flavonoid yang diduga dapat menghambat pertumbuhan bakteri yang telah resisten antibiotik. Penelitian ini bertujuan untuk mengetahui aktivitas antibakteri ekstrak rimpang Lengkuas merah (Alpinia purpurata K.Schum) terhadap pertumbuhan bakteri Klebsiella pneumoniae isolat urin pada penderita infeksi saluran kemih. Tanaman rimpang Lengkuas merah di ekstraksi dengan metode maserasi menggunakan pelarut etanol 96%. Uji aktivitas antibakteri dilakukan dengan metode cakram dan sumuran. Hasil penelitian menunjukkan bahwa ekstrak rimpang Lengkuas merah memiliki aktivitas antibakteri terhadap bakteri Klebsiella pneumoniae. Pada metode cakram untuk konsentrasi 80%, 60%, 40%, 20% dan 10% rata-rata diameter zona beningnya 13 mm, 12,3 mm, 10,6 mm, 10,5 mm dan 9,8 mm. Kemampuan aktivitas antibakteri termasuk dalam kategori kuat karena memiliki daya hambat 10 – 20 mm. Pada metode sumuran rata-rata diameter zona beningnya ialah 15,6 mm, 14,6 mm, 13,6 mm, 13 mm dan 11,3 mm.  Kemampuan aktivitas antibakteri pada metode sumuran konsentrasi 80%, 60%, 40%, 20% dan 10% termasuk dalam kategori kuat karena rata-rata diameter daya hambatnya 10 – 20 mm.Kata kunci : Rimpang Lengkuas merah, Alpinia purpurata K.Schum, Klebsiella pneumoniae

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