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Wyświetlanie 1-15 z 88
Tytuł:
Influence of silver and copper nanoparticles on Staphylococcus aureus biofilm formation
Wpływ nanocząstek srebra i miedzi na tworzenie biofilmu przez Staphylococcus aureus
Autorzy:
Widynska, E.
Zajac, A.
Jaworski, S.
Strojny, B.
Powiązania:
https://bibliotekanauki.pl/articles/2614.pdf
Data publikacji:
2018
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
Staphylococcus aureus
biological membrane
biofilm formation
nanoparticle
silver nanoparticle
copper nanoparticle
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Animal Science; 2018, 57[2]
1898-8830
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Animal Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Overview of the nanoparticles application for reservoir engineering and Enhanced Oil Recovery (EOR) methods
Autorzy:
Kułynycz, V.
Pikłowska, A.
Kulynych, O.
Powiązania:
https://bibliotekanauki.pl/articles/298807.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
nanoparticle
EOR
Opis:
The scientific aim of the paper is the characteristics of various types of nanoparticles, their physical and chemical parameters. In the article authors give examples of various nanoparticles used in reservoir engineering and EOR methods. The results of laboratory measurements of the impact of nanoparticles on the change of reservoir parameters and the increase of oil recovery of sandstones and carbonates are presented. In the article have been shown the possibilities of using nanotechnology, including the achievements of different authors. It presents a general literature review of modern research methodologies of nanoparticles in the global oil industry.
Źródło:
AGH Drilling, Oil, Gas; 2018, 35, 1; 107-124
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Surfactant Types on the Size of Tin Oxide Nanoparticles
Autorzy:
Boran, F.
Çetinkaya, S.
Şahin, M.
Powiązania:
https://bibliotekanauki.pl/articles/1031632.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
nanoparticle
tin oxide
surfactant
Opis:
In this study, tin oxide (SnO₂) nanoparticles were synthesized by hydrothermal method in the presence of hydrazine and ammonia by adding surfactant for 12 h in a Teflon autoclave at 100°C reaction temperature. Tin(II) chloride hydrate as an inorganic precursor, hexadecyl trimethyl ammonium bromide (CTAB), and tetrapropyl ammonium bromide (TPAB) as cationic, and sodium dodecyl sulfonate (SDS) as anionic surfactants were used. The results showed that the size and shape of nanoparticles depended on the surfactant types. The nanoparticles sizes between 17.5 and 19.7 nm were obtained by changing types of surfactants. Synthesized tin oxide nanoparticles were characterized by field emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and the Fourier transform infrared spectroscopy.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 546-548
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Photochemical production of gold films on the surface of fabric materials
Autorzy:
Abdurazova, Perizat
Sataev, Malik
Kenzhibayeva, Gulmira
Koshkarbayeva, Shayzada
Amanbayeva, Kalamkas
Raiymbekov, Yerkebulan
Powiązania:
https://bibliotekanauki.pl/articles/779051.pdf
Data publikacji:
2020
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
gold
nanoparticle
antibacteria
fabric
Opis:
A technology for producing gold films on the surface of fabric materials has been developed, which provides for preliminary wetting of the fabric product with aqueous solutions of gold (III) chloride. In this case, a sorption layer of gold chloride is formed on the surface of fabric materials. Then, when drying these products under sunlight, physicochemical and photochemical processes occur, leading initially to the formation of monovalent gold chlorides, which, having semiconductor properties, provide the release of elemental gold. After washing of by-products on the surface of the material remains an ultra-thin film of gold, which has a sufficiently strong grip on the base. Since the proposed technology does not require special equipment it can be used to apply functional films of gold on various products of technical, household and medical purposes.
Źródło:
Polish Journal of Chemical Technology; 2020, 22, 4; 28-30
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis of silver nanoparticles in a chitosan solution
Autorzy:
Modrzejewska, Zofia
Zarzycki, Roman
Sielski, Jan
Powiązania:
https://bibliotekanauki.pl/articles/1035481.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
chitosan salt
nanoparticle
silver
Opis:
In the present study silver nanoparticles were obtained using the ability of chitosan to form chelate compounds with metal ions and taking advantage of its reducing properties. The reduction process was conducted at the temperature 60°C or applying γ radiation from 60Co cobalt source. A preliminary characteristic which allows us to realize the size of formed silver nanoparticles was made on the basis of the measurements of UV absorption and dynamic light dispersion.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2010, 15; 63-72
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Obtaining of metallic nanoparticles by plasma-erosion electrical discharges in liquid mediums for biological application
Uzyskiwanie nanocząstek metali poprzez wyładowania elektryczne w zakresie erozji plazmy w środowisku wodnym w zastosowaniach biologicznych
Autorzy:
Lopatko, K.G.
Melnichuk, M.D.
Aftandilyants, Y.G.
Gonchar, E.N.
Boretskij, V.F.
Veklich, A.N.
Zakharchenko, S.N.
Tugay, T.I.
Tugay, A.V.
Trach, V.V.
Powiązania:
https://bibliotekanauki.pl/articles/56253.pdf
Data publikacji:
2013
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
metallic nanoparticle
nanoparticle
biological function
plasma
electrical discharge
liquid medium
biological application
Opis:
Obtaining of metallic nanoparticles by plasma-erosion electrical discharges in liquid mediums for biological application. The process of electrical discharge in the water of the plasma discharge channel was investigated and its diagnostics was performed. The specific features of the energy redistribution were shown, together with the physical model of the dispersed phase. The biological functionality of the metal nanoparticles and the prospects for their use in biotechnology were found.
Uzyskiwanie nanocząstek metali poprzez wyładowania elektryczne w zakresie erozji plazmy w środowisku wodnym w zastosowaniach biologicznych. Przeprowadzono badania wyładowań elektrycznych w środowisku wodnym w celu uzyskania nanocząstek metali. Określono specyficzne cechy redystrybucji energii oraz przedstawiono fizyczny model fazy rozproszonej. Określono funkcjonalność biologiczną nanocząsteczek metali oraz perspektywy ich wykorzystania w biotechnologii.
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Agriculture; 2013, 61 Agric.Forest Eng.
0208-5712
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Agriculture
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of inorganic nanoparticles on mechanical and morphological properties of wood flour-polypropylene nano composites
Autorzy:
Ismaeilimoghadam, S.
Masoudifar, M.
Nosrati, B.
Shamsian, M.
Powiązania:
https://bibliotekanauki.pl/articles/52324.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:
inorganic nanoparticle
nanoparticle
mechanical property
morphological property
wooden-plastic composite
wooden composite
nanocomposite
Źródło:
Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2016, 59, 196
1644-3985
Pojawia się w:
Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Enhanced Optical Response of Al, Rh, Ag, and Au Nanosphere Dimer in Uniform Electric Field
Autorzy:
Shishodia, Manmohan Singh
Juneja, Soniya
Powiązania:
https://bibliotekanauki.pl/articles/1159236.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Enhancement
dimer
hybridization
nanoparticle
plasmonics
Opis:
Localized Surface Plasmon Resonance (LSPR) mediated electromagnetic field enhancement play a vital role in enhancing the performance of bio-molecular sensors, photovoltaic cells and Raman spectroscopy (e.g., in SERS) etc., to name only a few. It is now well established that the field amplification factor (mode squared field) ~106 for spherical shaped plasmonic nanoparticle dimers is significantly higher than the amplification factor of a monomer which is ~103. In this work, a theoretical and semi-analytical approach based on multipole spectral expansion is used to investigate the electric field enhancement in the gap region of spherical nanoparticle dimers of Al, Rh, Ag, and Au. The dimer exhibit rich spectra compared to its isolated counterpart. For example, in contrast to a monomer, the dimer spectra consists of multiple resonant peaks which can be fine tuned by varying particle size and/or inter-particle separation. Moreover, the enhancement in dimer is several orders higher than that in monomers. Rich spectral features in dimer spectra arise from the interaction between particle plasmons of constituent NPs and their hybridization, which results in the splitting of plasmonic energy levels. We carry out, systematic investigation of these systems to quantify the effect of particle size, interparticle separation and metal type (Al, Ag, Au, Rh) on electric field enhancement.
Źródło:
World Scientific News; 2018, 113; 57-63
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Air quality filtration in vehicle cabins
Autorzy:
Burtscher, H.
Mayer, A.
Loretz, S.
Keller, A.
Kasper, M.
Czerwinski, J.
Powiązania:
https://bibliotekanauki.pl/articles/242450.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport
vehicles
nanoparticle
cabine filtration
Opis:
A filter system is presented which allows the reduction of the concentration of ultrafine particles in vehicle cabins to very low levels. The original ventilation system is switched to the recirculation mode and all cabin intake air is supplied via a retro fitted filter system. Tests with a variety of different vehicles (from passenger cars to coaches) show the efficiency of the system. Number concentration of particles inside and outside a car, the nanoparticle filtration system, fllter-efficiency: transmission for the new filter and for the filter loaded to apressure drop of 2.9 mbar, setup of the filter with integrated prefilter for course particles and blower, prototype of the filter system, main filter, prefilter and blower are included the system operated by an external control box, containing the drive electronics for the blower and displays for filter pressure drop and time meter, filter pressure drop as function of operating time in a highly polluted road tunnel, a possible solution to mount the filter system, particle concentration inside and outside the car (passenger car), concentration drops to very low levels, particle concentration inside and outside a passenger car with the filter turned on, two nanocleaner filter systems mounted in a school bus, filter system for buses installed in the luggage compartment are presented in the paper.
Źródło:
Journal of KONES; 2009, 16, 2; 59-69
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of the effect of zinc oxide nanoparticles and extract of Acorus calamus applied topically on surgical wounds inflicted on the skin of rabbits
Autorzy:
Abbas, A.
Muhammad, S.A.
Ashar, A.
Mehfooz, S.A.
Rauf, A.
Bakhsh, M.
Nadeem, T.
Fu, H.
Powiązania:
https://bibliotekanauki.pl/articles/16648000.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
antibiotic resistance
nanoparticle
plant extract
wound
Opis:
Antibiotics are used for postsurgical wound healing purposes but unfortunately, resistance against them demands some alternatives for quick recovery. Sepsis of wounds is a challenge for medical as well as veterinary professionals. Nanoparticles have significant advantages in wound treatment and drug resistance reversal. This study was conducted to appreciate emerging alternates of antibiotics like zinc oxide nanoparticles and plant extracts in topical application. Zinc oxide is considered a good wound healer and its nanoparticles are easy to access. So, the efficacies of zinc oxide nanoparticles and sweet flag plant extract ointments were tested to compare modern and traditional therapeutics as sweet flag is considered a pure medicinal plant. Rabbits were selected for this study due to the healing properties of their skin. Wounds were inflicted on the thoracolumbar region and treated for 29 days post-surgically daily with normal saline and the ointment of zinc oxide nanoparticles and sweet flag extract ointment, prepared in a hydrophilic solvent. Wound shrinkage was observed daily and histopathological analysis was made and results were compared. Zinc oxide nanoparticles ointment showed the most satisfactory results for every parameter included in the study. No side effects of its topical application were observed. Healing was normal without any complications. The preparations of zinc oxide nanoparticles may help in the era of antibiotic resistance as topical drugs in the future.
Źródło:
Polish Journal of Veterinary Sciences; 2023, 26, 2; 285-293
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Statistical Optimization of the Preparation of HNIW Nanoparticles via Oil in Water Microemulsions
Autorzy:
Bayat, Y.
Zarandi, M.
Khadiv-Parsi, P.
Salimi Beni, A.
Powiązania:
https://bibliotekanauki.pl/articles/358341.pdf
Data publikacji:
2015
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
HNIW
microemulsion
surfactant
nanoparticle
parameter optimization
Opis:
HNIW (2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane) is a family member of high-energy density cage nitramines which have so many versatile applications. In this paper, HNIW nanoparticles were prepared by the oil in water microemulsion route. The effects of various experimental parameters on this reaction were investigated using the Taguchi method. The effects of different variables: organic phase, water/organic phase (W1/W2), organic phase/ propanol (W3/W4) and HNIW weight percent, on the particle size of the HNIW were investigated at three distinct levels. Optimal conditions for obtaining HNIW nanoparticles were determined. Performing the process under the optimal conditions proposed by the Taguchi method leads to the production of HNIW nanoparticles with an average size of about 80 nm. The HNIW nanoparticles were characterized using Scanning Electron Microscopy (SEM), Dynamic Light Scattering (DLS), Differential Thermal Analysis (DTA) and X-Ray Diffraction (XRD).
Źródło:
Central European Journal of Energetic Materials; 2015, 12, 3; 459-472
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pre-sowing Seed Treatments With Silicon Nano-iron and Nano-silicon Particles on Germination of Dragonhead
Autorzy:
Sabaghnia, Naser
Yousefzadeh, Saeed
Janmohammadi, Mohsen
Mohebodini, Mehdi
Powiązania:
https://bibliotekanauki.pl/articles/2199673.pdf
Data publikacji:
2016-12-20
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
germination
nanoparticle
nanotechnology
Dracocephalum moldavica L.
Opis:
Nanotechnology is an emerging field of science widely exploited in agriculture in recent years. In this investigation, application of nanotechnology in agriculture via application of some nano-particles (nano-iron and nano-silicon) have been investigated in seed priming of dragonhead. Seeds were subjected to prehydration treatments by factor nano-silicon dioxide as; (S1) 0 mM or distilled water, (S2) 1 mM concentration and (S3) 2 mM concentration and and factor nano-iron oxide as; (F1) 0 Mm or distilled water, (F2) 1 mM concentration and (F3) 2 mM concentration. Germination percent, root fresh weight, shoot fresh weight, root length, shoot length, dry weight of the seed residue, root dry weight and shoot dry weight were measured. Analysis of variance showed significant variation for the main effect of nano-silicon dioxide as well as nanoiron dioxide in root length and dry weight of the seed residue. The interaction effect of nano-silicon × nanoiron priming treatments were significant in all of the measured traits except germination percentage and root fresh weight. The highest germination percentage was recorded in S2-F3, S3-F1 and S3-F3 while the root fresh weight was high in S2-F3 and treatments S1-F1 following to S2-F3 and S3-F2 produced the highest shoot fresh weight. Also, S2-F3 has the highest root length (16.1 cm) and the highest shoot length (18.4 cm). The best treatment combination suitable for obtaining of high values of germination characteristics of dragonhead was identified as S2-F3 (1 mM nano-silicon dioxide plus 2 mM nano-iron dioxide).
Źródło:
Plant Breeding and Seed Science; 2016, 74; 99-107
1429-3862
2083-599X
Pojawia się w:
Plant Breeding and Seed Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of Mechanisms Used by Algae to Decrease The Silver Toxicity in Aquatic Environment
Badanie mechanizmów stosowanych przez glony w celu zmniejszenia toksyczności srebra w środowisku wodnym
Autorzy:
Sedlakova-Kadukova, Jana
Pristas, Peter
Powiązania:
https://bibliotekanauki.pl/articles/318522.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
srebro
nanocząstka
detoksykacja
alga
silver
nanoparticle
detoxification
Opis:
In the study SEM, EDS, TEM and UV-vis analysis were used to investigate the biosorption, bioaccumulation and bioprecipitation/bioreduction of silver by freshwater green alga Parachlorella kessleri and to shed light on the reasons of biological silver nanoparticle production. When dead biomass of P. kessleri was used for silver removal, majority of silver (75%) was removed within 2 min. Biosorption was probably the main mechanisms responsible for Ag+ ions removal from aqueous solutions. However, when behaviour of living biomass in the presence of silver ions was studied, the decrease of silver concentration was slower (68% within 24 hours) with subsequent increase of silver concentration in the solution and extracellular formation of silver nanoparticles. The formed AgNPs exhibited a lower toxicity against tested organisms. Algal cells probably used the formation of nanoparticles combined with rapid biosorption as detoxification mechanisms against silver toxicity. Bioaccumulation inside the cells played only a minor role in the detoxification process.
W badaniu wykorzystano analizę SEM, EDS, TEM i UV-vis do zbadania biosorpcji, bioakumulacji i bioprecypitacji/bioredukcji srebra przez słodkowodną zieloną algę Parachlorella kessleri i rzucenia światła na przyczyny biologicznej produkcji nanocząstek srebra. Gdy do usunięcia srebra użyto martwej biomasy P. kessleri, większość srebra (75%) usunięto w ciągu 2 minut. Biosorpcja była prawdopodobnie głównym mechanizmem odpowiedzialnym za usuwanie jonów Ag+ z roztworów wodnych. Jednakże, gdy badano zachowanie żywej biomasy w obecności jonów srebra, spadek stężenia srebra był wolniejszy (68% w ciągu 24 godzin) z późniejszym wzrostem stężenia srebra w roztworze i zewnątrzkomórkowym tworzeniem nanocząstek srebra. Utworzone AgNP wykazywały mniejszą toksyczność wobec badanych organizmów. Komórki glonów prawdopodobnie wykorzystywały tworzenie nanocząstek połączonych z szybką biosorpcją jako mechanizmów detoksykacji przeciwko toksyczności srebra. Bioakumulacja wewnątrz komórek odgrywała tylko niewielką rolę w procesie detoksykacji.
Źródło:
Inżynieria Mineralna; 2019, 21, 1; 115-118
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and optical characteristics of silver nanoparticles on different substrates
Autorzy:
Budhiraja, N.
Sharma, A.
Dahiya, S.
Parmar, R.
Vidyadharan, V.
Powiązania:
https://bibliotekanauki.pl/articles/411878.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Nanoparticle
Crystallography
Topography
XRD
SEM
UV-VIS
Opis:
Silver nanoparticles have been deposited on glass and polyethylene substrate by Chemical Bath Deposition (CBD) technique and Chemical rolling method. A comparative study has shown that Chemical bath technique is superior compared to rolling technique for uniform deposition of silver nanoparticles on glass substrate. Crystallography investigation of these materials is done by X-ray diffraction (XRD) which reveals that average grain size is in nano region. Scanning Electron Microscope (SEM) is used for topography study of these prepared nanostructures. Optical properties of the synthesized materials are studied by UV-VIS in detail to check their potential for next era industrial revolution.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 14; 80-88
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis of Silica Microspheres Containing Iron Oxide Nanoparticles for Removal of Organic Pollutant by Adsorption and Photocatalytic Decomposition
Autorzy:
Cho, Young-Sang
Sung, Sohyeon
Powiązania:
https://bibliotekanauki.pl/articles/2049298.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
composite microsphere
magnetic nanoparticle
self-assembly
adsorption
Opis:
Iron oxide nanoparticles were incorporated to form composite microspheres of SiO2 and Fe2O3 for magnetic separation of the particles after adsorption or photochemical decomposition. Economic material, sodium silicate, was purified by ion exchange to prepare aqueous silicic acid solution, followed by mixing with iron oxide nanoparticles. Resulting aqueous dispersion was emulsified, and composite microspheres of SiO2 and Fe2O3 was formed from the emulsion droplets as micro-reactors during heating. Removal of methylene blue using the composite microspheres was performed by batch adsorption process. Synthesis of composite microspheres of silica containing Fe2O3 and TiO2 nanoparticles was also possible, the particles could be separated using magnets efficiently after removal of organic dye.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 3; 771-776
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
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