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1

Effect of Hypochlorous Acid and Silver Nanoparticles on Antibacterial Properties of Surgical Sutures

Kożuchowski Michał, Lange Agata, Skrzeczanowski Wojciech, Trischitta Paola, Witkowski Grzegorz, Kutwin Marta

Military Technology and Science

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2025

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Vol. 74, no. 4

97--108

EN

This paper presents the results of research into the effectiveness of the bactericidal effect of surgical sutures enriched with hypochlorous acid (300, 500 and 2000 ppm concentration) and silver nanoparticles at a concentration of 100 ppm. The research methodology included the RF (Radio Frequency) plasma activation process and the incorporation of hypochlorous acid into the structure of the surgical threads. In addition to structural studies carried out using electron and stereoscopic microscopy, determination of elemental composition using the LIBS method, zone of inhibition, and viability studies were also performed for the bacteria Pseudomonas aeruginosa and Staphylococcus aureus. Studies using laser emission spectroscopy have shown that the incorporation of hypochlorous acid into the structure of surgical threads is complex and requires further research.

PL

W pracy przedstawiono wyniki badań skuteczności oddziaływania bakteriobójczego nici chirurgicznych wzbogaconych kwasem podchlorawym (stężenie 300, 500 i 2000 ppm) oraz nanocząstkami srebra o stężeniu 100 ppm. Zastosowana metodyka badawcza obejmowała proces aktywacji plazmą RF (Radio Frequency) oraz wbudowanie kwasu podchlorawego w strukturę nici chirurgicznych. Oprócz badań strukturalnych przeprowadzonych z użyciem mikroskopii elektronowej i stereoskopowej, określenia składu pierwiastkowego metodą LIBS, wykonano również badania strefy zahamowania wzrostu i żywotności bakterii pałeczki ropy błękitnej (Pseudomonas aeruginosa) oraz gronkowca złocistego (Staphylococcus aureus). Badania wykonane laserową spektroskopią emisyjną wykazały, że wbudowanie kwasu podchlorawego w nici chirurgiczne jest złożone i wymaga dalszych badań.

2

Influence of silver nanoparticles on mechanical and antimicrobial properties of selected reinforced PC and HDPE composites

Adebesin Kayode, Kłeczek Anna M., Galeja Mateusz, Gabor Jadwiga, Markowski Jarosław, Swinarew Andrzej S.

Engineering of Biomaterials

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2025

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vol. 28, no. 173

art. no. 8

EN

This study investigated the influence of silver nanoparticles (AgNPs) on the mechanical and antibacterial properties of polycarbonate (PC) and high-density polyethylene (HDPE) composites reinforced with glass (GF), basalt (BF), carbon (CF), and cellulose (CEL) fibres. The mechanical properties of the composites were rigorously assessed by quantifying parameters such as impact strength, tensile strength, and elongation at break. This evaluation was performed in strict adherence to ASTM standards, ensuring reliability and consistency of the obtained data. The results demonstrated that fibre reinforcements enhanced the tensile strength of the composites, but resulted in reductions in both impact strength and elongation at break, particularly in composites containing cellulose. The addition of AgNPs further decreased impact strength and elongation at break, while slightly reducing tensile strength. The antimicrobial properties were evaluated using bacterial strains Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). Composites reinforced with glass fibre and AgNPs exhibited the highest antimicrobial efficacy compared to those containing AgNPs combined with cellulose, carbon, or basalt fibres. These findings suggest that while AgNPs enhance the antimicrobial properties, they may compromise the mechanical integrity of fibre-reinforced composites. The study contributes to the development of advanced composites with multifunctional properties for medical, sports, aerospace, construction, and engineering applications.

3

Photocatalytic degradation of turquoise blue textile dye using silver nanoparticles prepared from aqueous Kecemcem (Spondias pinnata) leaf extract

Putra Ngurah Wijaya, Suyasa I Wayan Budiarsa, Suarna I Wayan, Sukmaningsih Anak Agung Sagung Alit, Sastrawidana I Dewa Ketut

Ecological Engineering & Environmental Technology

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2025

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Vol. 26, iss. 3

223--244

EN

Silver nanoparticles (AgNPs) were generated utilizing Kecemcem (Spondias pinnata) leaf extract, and their efficacy in the photocatalysis of turquoise blue textile dye was assessed through a batch method. The produced AgNPs were characterized by identify characteristic absorption band using UV-visible spectroscopy. the functional groups using FTIR, the crystalline phase, structure, and size through XRD. The photoactive degradation of dye using AgNPs was examined under 50-watt UV irradiation at different initial pH mediums, AgNPs-to-dye volume ratios, dye concentrations, and lengths of exposure time. The AgNP creation is suggested by a color change from yellow to reddish brown and is supported by the UV-visible spectrum, which generally appears 420 nm. The functional groups contained in AgNPs were identified from FTIR analysis in the range 1066–3329 cm-1. The signal at 3329.14 cm-1 is assigned to OH stretching, while the peaks at 1631.7 cm-1 and 1386 cm-1 are compatible with C=C and C-C stretching of alkenes, as well as C-H stretching of amide bonds, confirming the presence of protein. Additionally, the signal at 1066.64 cm-1 indicates to C-O stretching of carbonyl functional group. Based on XRD data, it was confirmed that the crystalline phase of AgNPs was 54.35% with a crystal size of 22 nm, and the peaks observed at 2θ values of around 38.21°, 46.45°, 66.65°, and 77.55° showed the 111, 200, 220, and 311 planes of the cubic face-centered structure. The photocatalytic degradation efficiency of 125 mg/L turquoise blue textile dye of 94.57% was achieved at operational conditions of pH 5, the addition of 6 mL AgNPs per 100 mL dye, and irradiation with a 50-watt UV lamp for 150 mins. These results imply that silver nanoparticles prepared using bioreductants contained in Kecemcem leaf extract are very promising for treating organic contaminants found in textile wastewater.

4

Spatial distribution of low molecular weight compounds in orange carrot root revealed by mass spectrometry imaging

Misiorek Maria

Chemical Technology & Biotechnology

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2025

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Vol. 5

145--159

EN

Carrot (Daucus carota L. subsp. sativus Thell.) is a root vegetable of fundamental importance in global food production. Its economic significance is attributed to its versatile applications, high nutritional value, and the presence of numerous phytochemicals with health-promoting properties. In this study, the spatial distribution of low-molecular-weight metabolites - including amino acids, sugars, organic acids, fatty acids and phytosterols, vitamins, carotenoids, phenols, flavonoids, volatile compounds (aldehyde and monoterpenes), and oxylipin - within cross-sections of orange-coloured carrot root was investigated using mass spectrometry imaging (MSI) with the ¹⁰⁹Ag nanoparticle-enhanced target (¹⁰⁹AgNPET). In addition, the biological roles and potential health effects of the identified compounds are reviewed.

5

Detection of potential biomarkers of renal cancer using LDI MS

Frydrych Aleksandra

Chemical Technology & Biotechnology

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2025

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Vol. 5

121--128

EN

This article describes a study using laser desorption/ionization mass spectrometry to search for potential biomarkers of renal cell carcinoma. The studies were performed on a sample of healthy tissue and a sample of cancer tissue from the kidney of the same patient. Thirty-seven small-molecular-weight compounds were identified, and two of them had previous literature links to cancer.

6

Detection and quantitative analysis of polycyclic aromatic hydrocarbons by laser desorption/ionization mass spectrometry on monoisotopic silver-109 nanoparticles

Arendowski Adrian

Chemical Technology & Biotechnology

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2025

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Vol. 5

191--201

EN

This study demonstrates, for the first time, the quantitative detection of polycyclic aromatic hydrocarbons (PAHs) using monoisotopic silver-109 nanoparticle-enhanced targets in laser desorption/ionization mass spectrometry (109AgNPET LDI MS). Ten PAHs — anthracene, benzo(a)anthracene, benzo(a)pyrene, benzo(e)pyrene, chrysene, fluoranthene, perylene, phenanthrene, pyrene, and triphenylene — were analyzed, represented by four distinct molecular formulas, with radical cations (M+•) appearing as the predominant species in the MS spectra. The method yielded low chemical background, limited to silver cluster signals, enabling high-sensitivity analysis without matrix-related interferences. Limits of detection (LOD) ranged from 24 pg/mL for benzo(a)pyrene, benzo(e)pyrene, and perylene to 6.97 ng/mL for benzo(a)anthracene, chrysene, and triphenylene. Compared with existing methods, 109AgNPET LDI MS exhibited sensitivity surpassing or comparable to LC-MS, and in the case of benzo(a)pyrene, equaled the GC-MS, while eliminating sample pre-extraction or concentration steps. The results establish 109AgNPET LDI MS as a viable, rapid, and preparation-free approach for sensitive PAH analysis.

7

Application of mass spectrometry for imaging the distribution of primary and secondary metabolites in the storage root of red radish

Misiorek Maria, Ruman Tomasz

Chemical Technology & Biotechnology

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2025

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Vol. 5

129--144

EN

The radish (Raphanus sativus L.) is one of the most widely cultivated vegetables in the world, as it is rich in a variety of metabolites essential for human nutrition and health. The distribution of low molecular weight metabolites, including amino acids, sugars, fatty acids, sterol, organic acids, vitamins, gibberellins, glucosinolates and their breakdown products, phenols, and flavonoids was studied in cross-section of small red radish storage root using mass spectrometry imaging (MSI). The analysis was performed with the aid of silver-109 nanoparticles (109AgNPs), which were sputtered onto the imprint of the radish cross-section on a steel plate. The biological functions and health-promoting roles of the compounds studied are also discussed.

8

Silver nanostructures stabilized by starch derivatives for the determination of thallium in environmental samples

Karbowska Bożena, Modrzejewska-Sikorska Anna, Skowron Anna Wiktoria, Konował Emilia

Archives of Environmental Protection

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2025

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Vol. 51, no. 4

118--126

EN

Thallium, a highly toxic heavy metal, presents significant analytical challenges due to its low concentrations in diverse sample matrices. Consequently, there is a growing interest in developing innovative electrode materials with superior sensitivity, selectivity, and low detection limits to replace traditional mercury-based electrodes in voltammetry. This study focused on modifying a glassy carbon electrode (GCE) with silver nanostructures stabilized by starch derivatives and evaluating the impact of this modification on key electrode parameters. The modified electrode (GCE/AgNPs-E1451R) was applied for thallium determination using anodic stripping voltammetry. Analyses were conducted in a base electrolyte (EDTA solution) and a real groundwater sample from the Wielkopolska (Greater Poland) region. Silver nanostructures were synthesized using a doubly modified starch hydrolysate (E1451R) subjected to oxidation and acetylation. The stripping peak current of thallium showed linearity over concentrations ranging from 35 to 550 μg/L (1.71×10⁻⁷ to 2.69×10⁻⁶ M). The calculated limit of detection (LOD) was 9.75 μg/L (1.62×10⁻⁷ M). The GCE/AgNPs-E1451R electrode offers notable advantages, including a broad detection range, reduced analysis time by eliminating prolonged pre-concentration steps, and non-toxicity compared to mercury-based electrodes, providing a safer alternative for analytical applications, and making the electrode a promising alternative for environmental monitoring.

PL

Tal, będący wysoce toksycznym metalem ciężkim, stawia przed analitykami istotne wyzwania ze względu na jego niskie stężenia występujące w różnorodnych matrycach próbek. W związku z tym wzrasta zainteresowanie tworzeniem innowacyjnych materiałów elektrodowych charakteryzujących się wysoką czułością, selektywnością oraz niskimi granicami wykrywalności, które mogłyby zastąpić tradycyjne elektrody rtęciowe w woltamperometrii. Celem niniejszego badania była modyfikacja elektrody z węgla szklistego (GCE) za pomocą nanostruktur srebra stabilizowanych pochodnymi skrobi oraz analiza wpływu tej modyfikacji na kluczowe parametry elektrody. Zmodyfikowaną elektrodę (GCE/AgNPs-E1451R) zastosowano do oznaczania talu metodą anodowej woltamperometrii strippingowej. Analizy przeprowadzono zarówno w elektrolicie podstawowym (roztwór EDTA), jak i w rzeczywistej próbce wody gruntowej z terenu Wielkopolski. Nanostruktury srebra zostały syntetyzowane przy użyciu podwójnie modyfikowanego hydrolizatu skrobi (E1451R), który poddano procesom utleniania i acetylacji. Prąd szczytu strippingowego talu wykazał liniowość w zakresie stężeń od 35 do 550 μg/L (1,71×10⁻⁷ do 2,69×10⁻⁶ M). Obliczony limit wykrywalności (LOD) wyniósł 9,75 μg/L (1,62×10⁻⁷ M). Elektroda GCE/AgNPs-E1451R oferuje istotne zalety, w tym szeroki zakres wykrywalności, skrócony czas analizy dzięki eliminacji długotrwałych etapów prekoncentracji oraz działanie nietoksyczne w porównaniu do elektrod rtęciowych. Badana elektroda GCE/AgNPs-E1451R wykazuje istotne zalety w porównaniu z innymi typami elektrod, stanowiąc wszechstronne i efektywne rozwiązanie dla różnych zastosowań analitycznych. Charakteryzuje się wysoką skutecznością w szerokim zakresie stężeń, eliminując potrzebę przeprowadzania długotrwałych etapów wstępnego zatężania, co znacząco skraca całkowity czas analizy. Dodatkowo, w odróżnieniu od elektrod rtęciowych, elektroda GCE/AgNPs-E1451R jest nietoksyczna, stanowiąc bezpieczniejszą alternatywę dla zastosowań analitycznych.

9

Modification of PVC plastisol with silver nanoparticles to obtain protective materials with antibacterial properties

Kowalik Joanna, Tworek Magdalena, Ligocka Anna, Osial Magdalena

Advances in Science and Technology. Research Journal

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2025

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Vol. 19, no. 9

353--368

EN

In this work, we developed and characterized the membranes based on polyvinyl chloride plastisol modified with silver nanoparticles deposited on silica. The aim of the study was to obtain a functional PVC plastisol composite for use as linings and protective coatings, with improved mechanical, thermal, and antimicrobial properties. The plastisol was prepared by mixing PVC resin with a plasticizer (bis(2-ethylhexyl) adipate). Silver nanoparticles were produced by two methods: chemical reduction using sodium citrate and gum arabic, and these particles were deposited on Aerosil®200 silica. These composites were introduced into plastisol at different concentrations and then processed into films by gelation and hydraulic pressing. The formation of silver nanoparticles was confirmed by UV-Vis spectrophotometry, and the morphology of the composites was examined by scanning electron microscopy. Further characterization of the materials included infrared spectroscopy, thermomechanical analysis, mechanical property testing, and thermogravimetric analysis. Mechanical properties such as Young's modulus, tensile strength, and elongation at break were determined by static tensile tests. Shore hardness tests were also performed to evaluate the stiffness of the composites. The antimicrobial activity of the membranes was evaluated according to ASTM method E2149-01 using reference strains of S. aureus and E. coli. Studies have shown that silver nanoparticles effectively inhibited the growth of E. coli, especially at higher concentrations of AgNPs, while they had no effect on S. aureus. AgNPs modified membranes obtained from the reduction of AgNO₃ with sodium citrate and deposited on silica showed higher microbiological activity than those with AgNPs reduced with gum arabic. An optimal filler content in the range of 1 to 1.5% provides the most favorable combination of mechanical, thermal, and antibacterial properties.

10

Nowe modyfikowane materiały elektrodowe dla potrzeb woltamperometrycznego oznaczania talu : metodologia badań własnych

Karbowska Bożena, Modrzejewska-Sikorska Anna, Konował Emilia

Wiadomości Chemiczne

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2024

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[Z] 78, 11-12

1663--1673

EN

Thallium is one of the most toxic heavy metals. Despite numerous studies conducted over many years, the main difficulty in the analysis of thallium is that it is present in deficient concentrations in various types of samples. Therefore, new electrode materials are being sought, characterised by high sensitivity, selectivity, and low detection limit, which could replace toxic mercury electrodes in standard voltammetric measurements.

11

Modyfikacja elektrody glassy carbon kompozytem na bazie nanocząstek koloidalnego srebra stabilizowanych pochodnymi sieciowanymi skrobi dla potrzeb woltamperometrycznego oznaczania talu

Modrzejewska-Sikorska Anna, Konował Emilia, Kosińska Klaudia, Karbowska Bożena

Przemysł Chemiczny

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2023

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T. 102, nr 9

912--915

PL

W pracy podjęto próbę otrzymania nowego materiału elektrodowego na potrzeby woltamperometrycznego oznaczania talu, w wyniku modyfikacji elektrody glassy carbon (GCE) kompozytem na bazie nanocząstek koloidalnego srebra (AgNPs) stabilizowanych pochodnymi sieciowanymi skrobi (E1414). Głównym celem badań było uzyskanie niższych granic wykrywalności, powtarzalności wyników oraz skrócenie czasu pomiarów. Nowa modyfikowana elektroda GCE/AgNPs/E1414 wykazuje konkurencyjne parametry, które wskazują, że może pracować w dużych zakresach stężeń, nie wymaga długiego czasu zatężania, nie ulega zużyciu, nie wykazuje toksyczności (w odróżnieniu do elektrod zawierających rtęć) i jest bezpieczna dla otoczenia.

EN

A glassy carbon (GCE) electrode was covered with a composite prepd. by mixing the ammoniacal Ag complex with cross-linked starch derivs. and then was dried. The characteristics of the modified electrode were studied using the differential pulse voltammetry (DPASV) technique. A 0.2 M EDTA soln. was used as the base electrolyte. The modified electrode showed lower detection limits, repeatability of results and reduced measurement time, it could work over long distances, did not require long concn. times, did not wear out, was non-toxic and environmentally safe

12

Research on deposition of silver nanoparticles at the cellulose/NaNO3 electrolyte interface

Janusz Władysław, Kowalska Klaudia, Skwarek Ewa

Physicochemical Problems of Mineral Processing

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2023

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Vol. 59, iss. 4

art. no. 173554

EN

Currently the research on silver nanoparticles is of great demand owing to their antibacterial properties. One of the possibilities is the study of the silver deposition on the cellulose fibers, and more specifically of the silver nanoparticles and cellulose particles. The research was aimed at obtaining silver nanostructures by reducing ions with formaldehyde and then stabilizing them with the Pluronic solution. A suspension system containing cellulose fibers and silver nanoparticles was prepared in the basic electrolyte NaNO3. There were analyzed the following makes: pH of solutions, grain distribution and zeta potential ζ. Ag nanoparticles are largely applied in medicine, pharmacy, cosmetology and textile industry. Great interest in the nanostructures allows for developing knowledge about them, and thus creating the possibility of further improvement of their properties for subsequent applications.

13

Investigation of silver nanoparticles embedded in extracted gelatins from camel, bovine, and fish bones for possible use in radiation dosimetry

Alrashidi Thaar K., Aljuhani Alwaleed, Almugaiteeb Faisal, Badi Nacer, Al-Aoh Hatem A., Alghamdi Saleh A., Alsharari Abdulrhman M., Alzahrani Ahmed Obaid M., Almalki Khaled

Materials Science Poland

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2023

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Vol. 41, No. 4

1--12

EN

Gelatins from camel, bovine, and fish bones were successfully extracted by using chemical pretreatment and heating methods. The bones were demineralized for 3 days at ambient temperature using hydrochloric acid solutions (0.5–1 M), and the collagen was partially hydrolyzed by preheating in distilled water at 75–80°C for 3 h, followed by extraction temperature at 90°C for 1 h. Free-standing films of gelatin entrained with silver nanoparticles (Gel/AgNPs) at low concentrations (1.25, 2.5, and 5 mM) were synthesized as radiation dosimeters. A high-energy ultrasonic homogenizer was used to dissolve the gelatin in distilled water and to disperse the AgNPs in the gelatin. The nanocomposites’ morphology and crystallinity were investigated using scanning electron microscopy (SEM), optical absorption, and Fourier transform infrared (FTIR) spectroscopies. Dose enhancement was assessed using X-ray irradiations with beam energies below and above silver K-edge. The beam was configured by setting the X-ray generator at 15, 25.5, and 35 kV potential and a beam current of 1 mA. An X-ray detector is used to detect the number of electrons after passing through Gel/AgNPs samples. The use of AgNPs embedded in gelatin caused the enhancement of X-ray radiation absorption, and the highest percentage of linearity for the dosimeter was found to be 90% in the optical range of 395 nm to 425 nm. The preliminary results demonstrated that Gel/AgNPs material may be used in radiation dosimetry for low-energy radiotherapy sources.

14

Eco-friendly high-rate formation of silver nanoparticles in agave inulin and its bactericidal effect against Escherichia coli

Sánchez-Vieyra María Teresa, Ojeda-Martínez Miguel, Oceguera-Contreras Eden, Rodríguez-Preciado Sergio Yair, Díaz-Zaragoza Mariana, Martínez-Zérega Brenda Esmeralda, González-Solís José Luis, Oseguera-Galindo David Omar

Materials Science Poland

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2023

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Vol. 41, No. 3

62--73

EN

A high rate of silver nanoparticle formation, effective against the Escherichia coli (E. coli) bacterium, was obtained for the first time by means of a simple, eco-friendly, and low-cost green method in a solution of agave inulin. The study was carried out using the traditional method, in which the effects of the concentration of agave inulin, AgNO3, temperature, and pH on the synthesis were analyzed by UV-Vis spectroscopy and transmission electron microscopy (TEM). Most of the nanoparticles produced were spherical with a size less than 10 nm. In a sample with 20 mg/mL of agave inulin, 1 mM of AgNO3, T = 23°C, and pH = 12, the highest percentage of Ag+ ions available in the solution were reduced for the formation of nanoparticles in less than 40 min, whereas a sample prepared with 60 mg/mL of agave inulin, 10 mM of AgNO3, T = 23°C, pH = 12, and a storage time of 40 min showed a significant bactericidal effect on the E. coli strain. Agave inulin is a good biological compound for the formation of small, spherical silver nanoparticles. A pH of 12 favors a higher production speed of the silver nanoparticles and better use of the available Ag+ ions. In addition to this, the concentration of AgNO3 is a determining factor for increased formation of the nanoparticles necessary to bactericidal effect.

15

Facile green synthesis of Cinnamomum tamala extract capped silver nanoparticles and its biological applications

Narath Sajina, Shankar S. Sharath, Sivan Saranya Kothaplamoottil, George Bini, Thomas T. Dennis, Sabarinath Sankarannair, Jayaprakash Sajithkumar K., Wacławek Stanisław, Padil Vinod V. T.

Ecological Chemistry and Engineering. S

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2023

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Vol. 30, nr 1

7--21

EN

The plant mediated biogenic synthesis of nanoparticles is of magnificent concern due to its eco-benign and single pot nature. Here, Cinnamomum tamala (C. tamala) aqueous leaf extract was utilised for the silver nanoparticles’ (Ag NPs) synthesis. The phytoconstituents in the leaf extract were analysed by standard methods. These metabolites, especially carbohydrate polymers reduce Ag ions to Ag NPs accompanied by a reddish-brown coloration of the reaction mixture. The visual observation of intense brown colour is the first indication of the formation of Ag NPs. Various spectro-analytical techniques further characterise the Ag NPs. The green synthesised spherical Ag NPs were crystalline with an average size of 38 nm. The Ag NPs were scrutinised for antioxidant, antimicrobial and cytotoxic activity and obtained good results. The free radical scavenging was studied by 2, 2-Diphenyl-l-picrylhydrazyl (DPPH) assay. The antibacterial activity of Ag NPs was assessed against human pathogens, and it shown to have good antibacterial potency against a wide spectrum of bacteria. The cytotoxic activity against HEK-293T (human embryonic kidney) cell line was evaluated by 2,3-bis-(2-methoxy-4-nitro-5-sulfophenyl)-2H-tetrazolium-5-carboxanilide (XTT) assay. These potent biological activities enable C. tamala capped Ag NPs to be suitable candidates for the future applications in various fields, predominantly clinical and biomedical.

16

Influence of filler introduction method on structure and properties of polymer composites based on polyurethane and silver nanoparticles

Lysenkov Eduard A., Striutskyi Oleksandr V.

Composites Theory and Practice

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2023

|

R. 23, nr 3

145--152

EN

Polymer nanocomposites based on segmented polyurethane and silver nanoparticles (AgNPs) were synthesized using different methods of nanoparticle introduction. The dependence of their structure, thermophysical and antimicrobial properties on the method of introducing AgNPs was studied. It was established that the method of introduction affects both the spatial distribution of the filler particles and the final properties of the material. The introduction of AgNPs by the ultrasonic dispersion method leads to inhibition of the growth of the crystalline phase, which is associated with the formation of aggregates from AgNPs of small size, which have a large polymer-filler interaction surface. It is shown that the introducing AgNPs from a colloidal solution leads to an increase in the degree of crystallinity of the polymer matrix, which is a consequence of the nucleation effect of nanosized silver particles on the formation of the crystalline phase. It was established that the method of introducing nanoparticles does not affect their final antimicrobial properties. Owing to their unique characteristics, synthesized nanocomposite films can be promising for use as antimicrobial coatings.

17

Ink based on poly(3,4-ethylene dioxythiophene), poly(sulfonostyrene) and silver nanoparticles (PEDOT/PSS/SNP) blends for fabrics printing

Shahrim Nur’Aishah Ahmad, Hafiz Nur Nadia Mohd, Ahmad Zuraida, Azman Amelia Wong, Buys Yose Fachmi, Sarifuddin Norshahida

Polimery

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2022

|

Vol. 67, nr 6

249--254

EN

The influence of co-solvents such as: dimethylsulfoxide (DMSO), isopropyl alcohol (IPA), ethylene glycol (EG), ethanol (EtOH) and deionized water (DI) on the properties of ink based on poly(3,4--ethylene dioxythiophene), poly(sulfonostyrene) and silver nanoparticles (PEDOT/PSS/SNP) blends was investigated. The ink was obtained by the ultrasonic dispersion method by mixing PEDOT, PSS and SNP and then adding co-solvents. The ink was applied to the cotton fabric by printing method. The structure, electrical and functional properties of fabrics were investigated. The increase in electrical conductivity was found as a result of the phase separation between PEDOT and PSS due to the use of co-solvents. SEM micrographs showed good adhesion of the ink to the cotton fiber, which was confirmed by the FTIR method. The developed ink has great application potential, especially in electronic devices for biomedical purposes.

PL

Zbadano wpływ współrozpuszczalników, takich jak: dimetylosulfotlenek (DMSO), alkohol izopropylowy (IPA), glikol etylenowy (EG), etanol (EtOH) i dejonizowana woda (DI) na właściwości atramentu otrzymanego na bazie mieszaniny poli(3,4-etyleno dioksytiofenu), poli(sulfonostyrenu) i nanocząstek srebra (PEDOT/PSS/SNP). Atrament otrzymano metodą dyspersji ultradźwiękowej poprzez wymieszanie PEDOT, PSS i SNP, a następnie dodanie współrozpuszczalników. Na tkaninę bawełnianą atrament nanoszono metodą druku. Zbadano strukturę, właściwości elektryczne i funkcjonalne tkaniny. Stwierdzono zwiększenie przewodnictwa elektrycznego jako efekt rozdziału faz między PEDOT i PSS na skutek zastosowania współrozpuszczalników. Mikrofotografie SEM wykazały dobrą adhezję atramentu do włókna bawełnianego, co potwierdzono metodą FTIR. Opracowany atrament ma duży potencjał aplikacyjny, zwłaszcza w urządzeniach elektronicznych do celów biomedycznych.

18

The Ability of Rhizopus stolonifer MR11 to Biosynthesize Silver Nanoparticles in Response to Various Culture Media Components and Optimization of Process Parameters Required at Each Stage of Biosynthesis

Khleifat Khaled, Alqaraleh Moath, Al-limoun Muhamad, Alfarrayeh Ibrahim, Khatib Rasha, Qaralleh Haitham, Alsarayreh Ahmad, Al Qaisi Yaseen, Hajleh Maha Abu

Journal of Ecological Engineering

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2022

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Vol. 23, nr 8

89--100

EN

One of the most important roles for nanotechnology concerns is the development of optimizable experimental protocols for nanomaterials synthesis. The formation of silver nanoparticles (AgNPs) was supported by Rhizopus stolonifer MR11, which was isolated from olive oil mill soil samples. The ability of R. stolonifer MR11 to biosynthesize silver nanoparticles in response to various components of different culture media was tested. Furthermore, the conditions under which the reducing biomass filtrate was obtained, as well as the conditions of the bio-reduction reaction of AgNO3 into AgNPs, were investigated. The fungal biomass filtrate of the strain Rhizopus stolonifer MR11 was capable of converting silver nitrate into AgNPs, as evidenced by the color change of the fungal filtrates. UV-Vis spectrophotometer, TEM, Zeta potential, Zeta sizer, FT-IR, and XRD analyses were used to characterize the AgNPs. TEM analysis revealed that the silver nanoparticles were 1–35 nm in size. R. stolonifer MR11 produced the maximum AgNPs when grown for 18 hours at 36 °C in media with starch and yeast extract as the sole carbon and nitrogen sources, respectively. The reducing biomass filtrate was obtained by incubating 5 g mycelial biomass in deionized water with a pH of 6 for 48 hours at 30 °C. The optimal reduction conditions of the biosynthesis reaction were determined by adding 1.0 mM AgNO3 to a pH 5 buffered mycelial filtrate and incubating it for 72 hours at 33 °C. The current study’s findings highlighted the importance of process parameters at each stage for optimal AgNPs biosynthesis.

19

Antiadherent and antibacterial properties of TiO2-coated and TiO2:Ag-coated stainless steel orthodontic wires against S. mutans bacteria

Bącela Justyna Joanna, Kielan-Grabowska Zofia, Borak Beata, Sobieszczańska Beata, Walczuk Urszula, Kawala Beata, Zięty Anna, Detyna Jerzy, Sarul Michał

Acta of Bioengineering and Biomechanics

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2022

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Vol. 24, no. 3

107--118

EN

Conventional orthodontic treatment with stainless steel orthodontic wires may be detrimental to oral health, as it contributes to demineralized lesions and increases adhesion and bacterial biofilm formation, which contributes to cavity development. An alternative that has been investigated to reduce the side effects of orthodontic treatment is the use of coating materials with antimicrobial nanoparticles. This study aims to evaluate the antiadherent and antibacterial properties of TiO2-coated and TiO2:Ag-coated stainless steel orthodontic wires against S. mutans bacteria. Methods: In the sol–gel method, TiO2:Ag thin films were deposited on stainless steel orthodontic wires. Coated archwires were analyzed for their antibacterial and antiadherent properties. The evaluation of Streptococcus mutans adhesion to the orthodontic wires’ surface was conducted according to the type of coating used, biofilm formation assay, and measurement of the pH of the bacterial community. Results: In the microbiological test, the TiO2:Ag coatings revealed a statistically significant difference in terms of microbial adhesion and biofilm formation by Streptococcus mutans. The TiO2:Ag coating on stainless steel wire increased pH levels in the saliva environment. Conclusions: It can be concluded that antimicrobial orthodontic wires coated with silver- TiO2 nanoparticles using the sol–gel thin film are a promising choice for improving orthodontic treatment.

20

Optical Properties of Intraocular Implants Coated with Silver Nanoparticles

Jeż Kinga, Gacek Marcin, Nabiałek Marcin, Tóth László, Pike-Biegunski M.

Archives of Metallurgy and Materials

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2021

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Vol. 66, iss. 2

477--481

EN

Prolonged exposure to UV radiation, and ever-increasing life expectancy, mean that an increasing proportion of the population suffers from clouding of the intraocular lens. Nowadays, the performance of intraocular implantation procedures is commonplace. Unfortunately, with the increasing number of operations, the number of postoperative complications is also increasing. One way to avoid complications may be to use an intraocular implant that has been immersed in a solution containing silver nanoparticles. As part of the study, four selected intraocular implants – that are available on the ophthalmic market – were tested. In order to investigate the effect of silver particles on the optical properties of the implants, tests were carried out using a UV-VIS spectrophotometer. Two series of implants were tested: before and after immersion in a silver solution. The implants were immersed for a period of 7 days. It was found that the presence of silver particles does not have a negative impact on the translucency of the implants.