scholarly journals Application of Nano Silver/Lecithin on Wool through Various Methods: Antibacterial Properties and Cell Toxicity

2014 ◽  
Vol 9 (4) ◽  
pp. 155892501400900 ◽  
Author(s):  
Hossein Barani ◽  
Majid Montazer ◽  
Nasrin Samadi ◽  
Tayebeh Toliyat ◽  
Mohsen Khorashadi Zadeh ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Inductively Coupled Plasma ◽  
Low Voltage ◽  
Chemical Reduction ◽  
Antibacterial Properties ◽  
Emission Spectrometry ◽  
Wool Fabric ◽  
Cytotoxicity Test ◽  
Wool Fabrics ◽  
Loading Efficiency

Silver nanoparticles (AgNPs) were synthesized with lecithin through a simple chemical reduction method. The prepared AgNPs/lecithin was then loaded into the wool fabric by exhaustion and pad-dry-cure methods. The surface morphology of the loaded wool fabrics was characterized by low-voltage scanning electron microscopy, and the loading efficiency was determined by inductively coupled plasma optical emission spectrometry. Further, the effect of the different lecithin concentrations was examined on the antibacterial activity, cytotoxicity, and color of the loaded wool fabrics. The loaded fabric with AgNPs at a higher lecithin ratio presented higher antibacterial activity due to the higher loading efficiency and smaller nanoparticle size. Also, the morphology of the fibroblast cells in cytotoxicity test was not changed in presence of extracted solution from the treated wool fabrics with different lecithin concentration.

scholarly journals Chitosan Nanoparticles Functionalized Viscose Fabrics as Potentially Durable Antibacterial Medical Textiles

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3762
Author(s):  
Matea Korica ◽  
Zdenka Peršin ◽  
Lidija Fras Zemljič ◽  
Katarina Mihajlovski ◽  
Biljana Dojčinović ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Zeta Potential ◽  
Inductively Coupled Plasma ◽  
Cellulose Nanofibrils ◽  
Chitosan Nanoparticles ◽  
Antibacterial Properties ◽  
Zinc Content ◽  
Dynamic Contact ◽  
Emission Spectrometry ◽  
Washing Durability

This research proposed two pretreatments of viscose fabrics: oxidation with 2,2,6,6-tetramethylpiperidine-1-oxy radical (TEMPO) and coating with TEMPO-oxidized cellulose nanofibrils (TOCN), to introduce functional groups (COOH and CHO) suitable for irreversible binding of chitosan nanoparticles without and with embedded zinc (NCS and NCS + Zn, respectively) and consequently achieving washing durable antibacterial properties of the chitosan nanoparticles functionalized fabrics. The characterizations of pretreated and chitosan nanoparticles functionalized fabrics were performed by FTIR and XPS spectroscopy, elemental analysis, inductively coupled plasma optical emission spectrometry, zeta potential measurements, scanning electron microscopy, determination of COOH and CHO groups content, and antimicrobial activity under dynamic contact conditions. Influence of pretreatments on NCS and NCS + Zn adsorption, chemical, electrokinetic, and antibacterial properties as well as morphology, and washing durability of NCS and NCS + Zn functionalized fabrics were studied and compared. Washing durability was evaluated through changes in the chitosan and zinc content, zeta potential, and antibacterial activity after 1, 3, and 5 washing cycles. Pretreatments improved washing durability of antibacterial properties of chitosan nanoparticles functionalized fabrics. The NCS and NCS + Zn functionalized pretreated fabrics preserved antibacterial activity against S. aureus after five washing cycles, while antibacterial activity against E. coli was preserved only after one washing cycle in the case NCS + Zn functionalized pretreated viscose fabrics.

scholarly journals Effect of Low Copper Addition to As-Forged 304 Stainless Steel for Dental Applications

Metals ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 43
Author(s):  
Ker-Kong Chen ◽  
Chih-Yeh Chao ◽  
Jeng-Huey Chen ◽  
Ju-Hui Wu ◽  
Yen-Hao Chang ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Inductively Coupled Plasma ◽  
Copper Ions ◽  
Artificial Saliva ◽  
Testing Machine ◽  
Antibacterial Properties ◽  
304 Stainless Steel ◽  
Emission Spectrometry ◽  
Plasma Atomic Emission Spectrometry ◽  
Suitable Material

The aim of this study was to investigate the effect of incorporating low copper (0, 0.5, 1, 1.5, and 2 wt.%) additions into as-forged AISI 304 stainless steel (304SS). The microstructures and mechanical properties of the steel were examined using scanning electron microscopy and a universal testing machine. The antibacterial properties of the Cu-bearing 304SS specimens were investigated using Escherichia coli. Each specimen was soaked in artificial saliva to detect the release of copper ions through inductively coupled plasma atomic emission spectrometry. The addition of copper had no significant effect on the microstructure of the as-forged Cu-bearing 304SS, but it slightly increased its maximum tensile strength. The antibacterial rate of the as-cast and as-forged 304SS with 2 wt.% Cu was over 80%, which corresponded to an increase in the release of copper ions. This study demonstrates that low-Cu-content stainless steel can reduce bacteria and can be a suitable material for the oral environment because of the low release of Cu ions.

scholarly journals Green preparation and characterization of silver nanocolloids used as antibacterial material in soap

2022 ◽  
Author(s):  
M. Nowak ◽  
A. Tolińska ◽  
L. Marciniak ◽  
M. Skrobańska ◽  
B. Tylkowski ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Inductively Coupled Plasma ◽  
Antibacterial Properties ◽  
Dirty Hands ◽  
Inductively Coupled ◽  
Transmission Electron ◽  
Pure Soap ◽  
Vis Spectroscopy ◽  
Plasma Mass Spectrometry

AbstractThis study aimed to assess the characteristics, including morphology, physicochemical properties, and antibacterial properties, of silver nanocolloids obtained by D-glucose reduction. Silver nanoparticles were synthesized in accordance with the principles of green chemistry using D-glucose as a reductor. The obtained nanostructures were characterized by UV–vis spectroscopy, transmission electron microscopy, and dynamic light scattering. Stability tests performed after 1 month of storage revealed that the colloids prepared with and without polyvinylpyrrolidone as a stabilizer had the same properties. Distribution of the nanoparticles was tested using inductively coupled plasma mass spectrometry by doping the silver colloids into a natural soap mass. The antibacterial activity of the soap containing silver nanoparticles was tested on dirty hands. The antibacterial activity test demonstrated that the novel green soap materials improved with D-glucose-reduced silver nanoparticles possessed better antibacterial properties than a pure soap, and thus, they could be recommended for quotidian use by dermatological patients.

scholarly journals Antimicrobial Peptides-Loaded Hydroxyapatite Microsphere With Different Hierarchical Structures for Enhanced Drug Loading, Sustained Release and Antibacterial Activity

2021 ◽  
Vol 9 ◽  
Author(s):  
Dandan Hong ◽  
Jingjing Wu ◽  
Xuemin Xiao ◽  
Xueyang Li ◽  
Dong Xu ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Antimicrobial Peptides ◽  
Surface Potential ◽  
Hierarchical Structure ◽  
Drug Loading ◽  
Antibacterial Properties ◽  
Hierarchical Structures ◽  
Biological Behavior ◽  
Release Behavior ◽  
Loading Efficiency

Antimicrobial peptides (AMPs) have great potential for clinical treatment of bacterial infection due to the broad-spectrum and highly effective antibacterial activity. However, the easy degradation and inactivation in vivo has been a major obstacle for their application and an effective delivery system is demanding. The surface physicochemical properties of the carrier, including surface potential, surface polarity, pore structure and morphology, have exerted great effects on the adsorption and release behavior of AMPs. This study investigated the influence of micro/nano carriers with different hierarchical structures on the loading, release and biological behavior of AMPs. Three types of AMPs-loaded hydroxyapatite microspheres (HA/AMPs MSs) with different hierarchical structures (needle-like, rod-like, and flake-like) were developed, which was investigated by the surface morphology, chemical composition and surface potential in detail. The different hierarchical structures of hydroxyapatite microspheres (HA MSs) had noticeable impact on the loading and release behavior of AMPs, and the flake-like HA MSs with hierarchical structure showed the highest loading efficiency and long-lasting release over 9 days. Meanwhile, the stability of AMPs released from HA MSs was effectively maintained. Moreover, the antibacterial test indicated that the flake-like HA/AMPs MSs showed more sustained antibacterial properties among three composites. In view of the excellent biocompatibility and osteogenic property, high loading efficiency and the long-term release properties of HA MSs with hierarchical structure, the HA/AMPs MSs have a great potential in bone tissue engineering.

Nanocomposite polyacrylonitrile filaments with electrostatic dissipative and antibacterial properties

2016 ◽  
Vol 50 (30) ◽  
pp. 4279-4289 ◽  
Author(s):  
Nuray Kizildag ◽  
Nuray Ucar
Keyword(s):  
Antibacterial Activity ◽  
Silver Nitrate ◽  
Chemical Reduction ◽  
Antibacterial Properties ◽  
Reduction Process ◽  
Nitrate Content ◽  
Visible Spectroscopy ◽  
Ion Release ◽  
Filament Structure ◽  
Silver Release

In this study, silver nitrate was added to polyacrylonitrile filament structure and chemical reduction was applied to composite filaments in order to develop multifunctional polyacrylonitrile filaments with electrostatic dissipative and antibacterial properties. Composite filaments of polyacrylonitrile and silver nitrate were characterized and evaluated in terms of morphology, chemical structure, tensile properties, crystallinity, conductivity, thermal properties, silver ion release behaviour and antibacterial activity. Additionally, ultraviolet-visible spectroscopy was used to confirm the formation of nanoparticles and the variation in the concentration of the nanoparticles with the application of the chemical reduction process. Scanning electron microscope images and ultraviolet-visible spectroscopy results confirmed the formation of nanoparticles in the filament structure. Breaking strength and breaking elongation increased at silver nitrate content of 1%. Composite filaments displayed improved thermal stability and their conductivities were in the semiconductive range. Atomic absorption spectroscopy confirmed that necessary amounts of silver release for antibacterial activity occurred, while the antibacterial activity analysis showed that the composite filaments have excellent antibacterial activity. The results obtained were promising and showed that the composite filaments could be used in electrostatic dissipative and antibacterial applications.

scholarly journals Preparation of nanocomposite silver/kaolin with antibacterial properties

2021 ◽  
Vol 340 ◽  
pp. 01030
Author(s):  
Balnur Baltabayeva ◽  
Aliya Ospanova ◽  
Zhanar Kubasheva
Keyword(s):  
Antibacterial Activity ◽  
Chemical Reduction ◽  
Antibacterial Properties ◽  
Chemical Properties ◽  
Silica Matrix ◽  
Gram Positive Bacteria ◽  
Composition And Structure ◽  
Bet Method ◽  
Mobile Ions ◽  
Physical And Chemical

In this study, a nanocomposite based on kaolin from the Alekseevsky deposit (Kazakhstan), containing nano-silver particles, was synthesized. Kaolin has good physical and chemical properties and is an effective carrier for medicines. The synthesis of AgNPs/kaolin nanocomposites was carried out by chemical reduction. Impregnation of silver nanoparticles into silica matrix can prevent the agglomeration of mobile ions, and thereby preserve the antibacterial activity of the compound. The composition and structure of the resulting nanocomposite were studied using SEM/EDS analysis to study the morphology and elemental composition of natural and silver-modified kaolin, the specific surface was determined by the BET method, and functional groups were identified by IR spectroscopy. The resulting composite was tested for antibacterial activity against Gram-negative and Gram-positive bacteria (E.Сoli, S. Aureus).

Synthesis and Antibacterial Activity of Silver Nanoparticles Against Escherichia coli and Pseudomonas sp.

2021 ◽  
Author(s):  
Md. Irfanul Hoque ◽  
Sultana Afrin Jahan Rima ◽  
Md. Salah Uddin ◽  
M. Julkarnain
Keyword(s):  
Escherichia Coli ◽  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Chemical Reduction ◽  
Bacterial Species ◽  
Sodium Dodecyl ◽  
Antibacterial Properties ◽  
Diffusion Method ◽  
Bacterial Strains ◽  
X Ray Diffraction

Silver nanoparticles (AgNPs) have been synthesized by chemical reduction method using ascorbic acid as reducing agent. Silver nitrate (AgNO[Formula: see text] and sodium dodecyl sulfate (SDS) have been used as precursor and stabilizer, respectively. The prepared samples were characterized by UV-visible spectroscopy, scanning electron microscopy (SEM) and X-ray diffraction (XRD). The antibacterial activity of prepared silver nanoparticles has been assessed by using the disc diffusion method against pathogenic, gram-negative bacterial strains including Escherichia coli and Pseudomonassp. To evaluate the potential antibacterial properties of AgNPs, the discs have been impregnated and dried with three different doses like 50, 100 and 150[Formula: see text][Formula: see text]l of 20[Formula: see text][Formula: see text]g/ml concentrated AgNPs solution and placed on the Petri-dishes. The antibiotic kanamycin (5[Formula: see text][Formula: see text]g) was used as control. In all the cases, a clear and distinct zone of inhibition is observed, which suggests that AgNPs can be used as effective growth inhibitors of various bacterial species and would be promising candidate for future development of antibacterial agents.

scholarly journals Antibacterial properties of wool fabrics treated with 8-hydroxyquinoline and boron compounds

2020 ◽  
Vol 71 (02) ◽  
pp. 168-173
Author(s):  
TEZCAN ERDEM ◽  
BÜYÜKAKINCI B. YEŞIM
Keyword(s):  
Antibacterial Activity ◽  
Boric Acid ◽  
Nosocomial Infections ◽  
Antibacterial Properties ◽  
Control Group ◽  
Boron Compounds ◽  
E Coli ◽  
Wool Fabrics ◽  
Homogenous Distribution ◽  
Experimental Group

In this study, antibacterial properties of wool fabrics treated with 8-hydroxyquinoline (8HQ) and boron compounds were investigated against E. coli, B. subtilis, S. aureus and P. aeruginosa. Experimental group consisted of wool fabrics treated with 8HQ, boric acid (BA) and borax (BX) at 10 g/L concentration for each using the exhaust process. Control group consisted of untreated and silver nitrate treated wool fabrics. Treatments were performed using meta- and pre- mordanting methods and homogenous distribution of treatment chemicals were confirmed with SEM and EDX images. Wool samples treated with a solution containing 8HQ+BX (10 g/L each) and 8HQ+BA+BX (10 g/L each) showed the highest level of antibacterial activity. Antibacterial activity decreased analogous with the decrease in 8HQ concentration however it was still present at the lowest concentration of 1 g/L for E. coli, B. subtilis and S. aureus. But at least 5g/L concentration of 8HQ was required for antibacterial activity against all four tested bacteria. Antibacterial properties decreased after 5 cycles of washing but did not completely disappear. These antibacterial wool products look promising for the medical fields because of their strong effects against bacteria which grow in wounds and cause nosocomial infections. In addition, using the meta-mordanting method was more effective in terms of saving energy, water and time compared to the pre- mordanting method.

Silicate analysis of carbonated rocks using ICP-AES with calibration by the concentration ratio

2020 ◽  
Vol 86 (5) ◽  
pp. 16-21
Author(s):  
T. A. Karimova ◽  
G. L. Buchbinder ◽  
S. V. Kachin
Keyword(s):  
Inductively Coupled Plasma ◽  
Concentration Ratio ◽  
Total Error ◽  
Atomic Emission ◽  
Emission Spectrometry ◽  
Calibration Error ◽  
Plasma Atomic Emission Spectrometry ◽  
Standard Samples ◽  
Inductively Coupled ◽  
Carbonate Materials

Calibration by the concentration ratio provides better metrological characteristics compared to other calibration modes when using the inductively coupled plasma atomic emission spectrometry (ICP-AES) for analysis of geological samples and technical materials on their base. The main reasons for the observed improvement are: i) elimination of the calibration error of measuring vessels and the error of weighing samples of the analyzed materials from the total error of the analysis; ii) high intensity of the lines of base element; and iii) higher accuracy of measuring the ratio of intensities compared to that of measuring the absolute intensities. Calcium oxide is better suited as a base when using calibration by the concentration ratio in analysis of carbonate rocks, technical materials, slags containing less than 20% SiO2 and more than 20% CaO. An equation is derived to calculate the content of components determined in carbonate materials when using calibration by the concentration ratio. A method of ICP-AES with calibration by the concentration ratio is developed for determination of CaO (in the range of contents 20 – 100%), SiO2 (2.0 – 35%), Al2O3 (0.1 – 30%), MgO (0.1 – 20%), Fe2O3 (0.5 – 40%), Na2O (0.1 – 15%), K2O (0.1 – 5%), P2O5 (0.001 – 2%), MnO (0.01 – 2%), TiO2 (0.01 – 2.0%) in various carbonate materials. Acid decomposition of the samples in closed vessels heated in a HotBlock 200 system is proposed. Correctness of the procedure is confirmed in analysis of standard samples of rocks. The developed procedure was used during the interlaboratory analysis of the standard sample of slag SH17 produced by ZAO ISO (Yekaterinburg, Russia).

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