keyword
MENU ▼
Read by QxMD icon Read
search

silver nanoparticle

keyword
https://www.readbyqxmd.com/read/29244869/lspr-mediated-high-axial-resolution-fluorescence-imaging-on-a-silver-nanoparticle-sheet
#1
Eiji Usukura, Yuhki Yanase, Ayumi Ishijima, Thasaneeya Kuboki, Satoru Kidoaki, Koichi Okamoto, Kaoru Tamada
This paper reports our original technique for visualizing cell-attached nanointerfaces with extremely high axial resolution using homogeneously excited localized surface plasmon resonance (LSPR) on self-assembled silver nanoparticle sheets. The LSPR sheet can confine and enhance the fluorescence at the nanointerface, which provides high signal-to-noise ratio images of focal adhesion at the cell-attached interface. The advantage of this LSPR-assisted technique is its usability, which provides comparable or higher-quality nanointerfacial images than TIRF microscopy, even under epifluorescence microscopy...
2017: PloS One
https://www.readbyqxmd.com/read/29242127/investigation-of-antibacterial-properties-of-novel-papain-immobilized-on-tannic-acid-modified-ag-cufe2o4-magnetic-nanoparticles
#2
Keziban Atacan, Münteha Özacar, Mahmut Özacar
The non-toxic CuFe2O4 magnetic nanoparticles have been solvothermally synthesized, characterized and used as an efficient magnetic precursor for papain immobilization and then investigated antibacterial properties. For increasing the antibacterial activity, the silver nanoparticles were doped on CuFe2O4 magnetic nanoparticles. All prepared samples exhibited stronger antibacterial properties against Gram-positive bacteria (Staphyloccocus aureus) than Gram-negative bacteria (Escherichia coli). However, it was determined that the Ag/CuFe2O4 had a more vigorous antibacterial property against the Staphyloccocus aureus bacteria by calculating the inhibition diameter of 25±0...
December 11, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29241764/determining-the-effects-of-green-chemistry-synthesized-ag-nisin-nanoparticle-on-macrophage-cells
#3
Masood Moein, Abbas Ali Imani Fooladi, Hamideh Mahmoodzadeh Hosseini
Bacteriocins are low molecular weight substances produced through post transcriptional changes. These molecules are easily degraded in mammalian gut by proteolytic enzymes especially protease. Nisin is a peptide with 34 aa and its structure contains a pentacyclic lanthionine and 4 beta metyllanthionine residues. Different formulations have been designed for nisin. Since "green synthesis" is a progressive method to prepare anti-microbial and anti-cancer compounds, this study aimed at green synthesis of nisin metal compounds to be used lower concentration still exerting nisin effects...
December 11, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29241128/mobility-of-polivinylpyrrolidone-coated-silver-nanoparticles-in-tropical-soils
#4
Alejandro Yopasá Arenas, Gustavo de Souza Pessôa, Marco Aurélio Zezzi Arruda, Anne Hélène Fostier
Experiments in saturated soil columns were performed to investigate the transport and retention of 25 nm and 75 nm silver nanoparticles stabilized with polyvinylpyrrolidone (PVP-AgNPs) in two Brazilian soils (sandy and sandy-clay). The normalized concentration of the PVP-AgNPs was obtained through a flow injection analysis method based on the surface plasmon ressonance effect of the metallic nanoparticles. The use of the ultraviolet-visible spectroscopy (UV-Vis) allows a rapid and low-cost analysis. The obtained breakthrough curves (BCs) were modeled with a deterministic model of solute transport in steady conditions of water flow and considering two regions of non-physical equilibrium; this model allowed the determination of the hydrodynamic parameters...
December 5, 2017: Chemosphere
https://www.readbyqxmd.com/read/29239663/laser-desorption-ionization-ms-imaging-of-cancer-kidney-tissue-on-silver-nanoparticle-enhanced-target
#5
Adrian Arendowski, Joanna Nizioł, Krzysztof Ossoliński, Anna Ossolińska, Tadeusz Ossoliński, Zygmunt Dobrowolski, Tomasz Ruman
AIM: Renal cell carcinoma is a very aggressive and often fatal disease for which there are no specific biomarkers found to date. The purpose of work was to find substances that differentiate the cancerous and healthy tissue by using laser desorption/ionization MS imaging combined with silver nanoparticle-enhanced target. RESULTS: Ion images and comparative analysis of spectra revealed differences in intensities for several metabolites, for which their biochemical properties were discussed...
December 14, 2017: Bioanalysis
https://www.readbyqxmd.com/read/29238274/hormetic-response-by-silver-nanoparticles-on-in-vitro-multiplication-of-sugarcane-saccharum-spp-cv-mex-69-290-using-a-temporary-immersion-system
#6
Jericó J Bello-Bello, Rocío A Chavez-Santoscoy, Carlos A Lecona-Guzmán, Nina Bogdanchikova, Josafhat Salinas-Ruíz, Fernando Carlos Gómez-Merino, Alexey Pestryakov
Background: Hormesis is considered a dose-response phenomenon characterized by growth stimulation at low doses and inhibition at high doses. The hormetic response by silver nanoparticles (AgNPs) on in vitro multiplication of sugarcane was evaluated using a temporary immersion system. Methods: Sugarcane shoots were used as explants cultured in Murashige and Skoog medium with AgNPs at concentrations of 0, 25, 50, 100, and 200 mg/L. Shoot multiplication rate and length were used to determine hormetic response...
October 2017: Dose-response: a Publication of International Hormesis Society
https://www.readbyqxmd.com/read/29238173/a-light-assisted-in-situ-embedment-of-silver-nanoparticles-to-prepare-functionalized-fabrics
#7
Her Shuang Toh, Roxanne Line Faure, Liyana Bte Mohd Amin, Crystal Yu Fang Hay, Saji George
This article presents a simple, one-step, in situ generation of silver nanoparticle-functionalized fabrics with antibacterial properties, circumventing the conventional, multistep, time-consuming methods. Silver nanoparticle formation was studied with a library of capping agents (branched polyethylenimine [BPEI] of molecular weight [Mw] 10,000 and 25,000, polyvinylpyrrolidone, polyethylene glycol, polyvinylalcohol and citrate) mixed with silver nitrate. The mixture was then exposed to an assortment of light wavelengths (ultraviolet, infrared and simulated solar light) for studying the light-assisted synthesis of nanoparticles...
2017: Nanotechnology, Science and Applications
https://www.readbyqxmd.com/read/29235124/silver-nanoparticles-increase-connexin43-mediated-gap-junctional-intercellular-communication-in-hacat-cells-through-activation-of-reactive-oxygen-species-and-mitogen-activated-protein-kinase-signal-pathway
#8
Yu Qin, Limin Han, Di Yang, Hongying Wei, Yue Liu, Junhui Xu, Herman Autrup, Furong Deng, Xinbiao Guo
Silver nanoparticles (AgNPs) are widely used in health and consumer products that routinely contact skin. However, the biological effects and possible mechanisms of AgNPs on skin remain unclear. Gap junctional intercellular communication (GJIC) plays a critical role in multicellular organisms to maintain tissue homeostasis. The aim of this study is to examine if non-coated AgNPs affect GJIC in human keratinocytes (HaCaT cells), and to identify the possible molecular mechanisms responsible for the effects. GJIC, connexin (Cx)43 protein and mRNA expression, and the effect of siRNA-mediated knockdown of Cx43 on GJIC were assessed...
December 13, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/29233039/characterization-antibacterial-total-antioxidant-scavenging-reducing-power-and-ion-chelating-activities-of-green-synthesized-silver-copper-and-titanium-dioxide-nanoparticles-using-artemisia-haussknechtii-leaf-extract
#9
Mehran Alavi, Naser Karimi
Recently, major problem related to pathogenic bacteria is augmentation of antibiotic resistance which has been changed treatment and recovery of millions of infectious patients. The present study reports an eco-friendly, rapid and easy method for synthesis of silver (Ag), copper (Cu) and titanium dioxide (TiO2) nanoparticles (NPs) using Artemisia haussknechtii leaf aqueous extract with antibacterial activities against multi-drug resistance (MDR) bacteria species. Three different concentrations (0.001, 0.01 and 0...
December 12, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29231883/silver-nanoparticles-in-the-lung-toxic-effects-and-focal-accumulation-of-silver-in-remote-organs
#10
Martin Wiemann, Antje Vennemann, Franziska Blaske, Michael Sperling, Uwe Karst
The distribution of silver (Ag) into remote organs secondary to the application of Ag nanoparticles (Ag-NP) to the lung is still incompletely understood and was investigated in the rat with imaging methods. Dose-finding experiments were carried out with 50 nm- or 200 nm-sized polyvinyl pyrrolidine (PVP)-coated Ag-NP using alveolar macrophages in vitro and female rats, which received Ag-NP via intratracheal instillation. In the main study, we administered 37.5-300 µg per rat lung of the more toxic Ag50-PVP and assessed the broncho-alveolar lavage fluid (BALF) for inflammatory cells, total protein and fibronectin after three and 21 days...
December 12, 2017: Nanomaterials
https://www.readbyqxmd.com/read/29231755/pharmaceutical-aspects-of-silver-nanoparticles
#11
Prateek Mathur, Swati Jha, Suman Ramteke, N K Jain
Silver nanoparticles are particles in the size ranging between 1 and 100 nm. The two major methods used for synthesis of silver nanoparticle are the physical and chemical methods with the disadvantage that they are expensive and can also have toxicity. Biological method is being used as an expedient alternative, as this approach is environment-friendly and less toxic and it includes plant extracts, microorganism, fungi, etc. The major applications of silver nanoparticles in the medical field include diagnostic applications and therapeutic applications, apart from its antimicrobial activity...
December 12, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29230971/electroless-coated-magnetic-three-dimensional-graphene-with-silver-nanoparticles-used-for-the-determination-of-pesticides-in-fruit-samples
#12
Hassan Sereshti, Zahra Afsharsaveh, Hamid Gaikani, Hamid Rashidi Nodeh
A new type of adsorbent composed of magnetic three-dimensional graphene coated with silver nanoparticles was synthesized by an electroless technique and used in the magnetic solid-phase extraction of selected pesticides (fenitrothion, chlorpyrifos, and hexaconazole) before gas chromatography with micro-electron capture detector. The adsorbent was characterized using Fourier-transform infrared spectroscopy, X-ray diffraction, vibrating sample magnetometry and field-emission scanning electron microscopy. The important extraction parameters such as pH, adsorbent dose, extraction time and desorption conditions were investigated...
December 12, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/29228870/augmented-photocatalytic-antibacterial-and-antifungal-activity-of-prunosynthetic-silver-nanoparticles
#13
Shaan Bibi Jaffri, Khuram Shahzad Ahmad
The present study has demystified the first and single step prunosynthesis of the spherical silver nanoparticles (AgNPs) from aqueous fruit extract of angiospermic plant, Prunus cerasifera, which has remarkable fusion of reducing cum stabilizing bioactive components (phenols, anthocyanins, carotenoids, flavonoids, organic acids, tannins and vitamins). Highly stable prunosynthetic AgNPs with 2.04 nm average crystallite size were synthesized in dark and in sunlight at optimized condition of temperature, time and P...
December 11, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29227564/novel-mold-resistant-building-materials-impregnated-with-thermally-reduced-nano-silver
#14
Yen-Chi Chen, Kuo-Pin Yu, Wen-Cheng Shao, Chao-Heng Tseng, Wen-Chi Pan
In this study, we evaluated the long-term antifungal effectiveness of 3 types of interior building materials (gypsum board (GB), cement board (CB) and softwood plywood (S-PW)) impregnated with thermally reduced silver nanoparticles supported by titanium dioxide (AgNPs/TiO2 ) under 95% relative humidity for four weeks. AgNPs/TiO2 was synthesized at two thermal reduction temperatures (TRTs, 120 and 200°C) with two different AgNP weight percentages (2 and 5 wt%). Four different silver loading levels (SLLs, 0...
December 11, 2017: Indoor Air
https://www.readbyqxmd.com/read/29227092/a-sandwich-type-electrochemiluminescence-sensor-for-detection-of-nt-probnp-by-using-high-efficiency-quench-strategy-of-fe3o4-pda-toward-ru-bpy-32-coordinated-with-silver-oxalate
#15
Li Shi, Xiaojian Li, Wenjuan Zhu, Yaoguang Wang, Bin Du, Wei Cao, Qin Wei, Xuehui Pang
Heart failure (HF) is a burgeoning public health problems trigged by heart circulation disorder. N-terminal pro-B-type natriuretic peptide (NT-proBNP) has been acknowledged as a prognostic biomarker for cardiac disease. Herein, a sandwich-type electrochemiluminescence (ECL) immunosensor was introduced for sensitive detection of NT-proBNP. Gold nanoparticles modified graphene oxide-Ru(bpy)32+/Ag2C2O4 was used as luminophore and desirable platform for immobilization of the capture antibodies. The more stable immobilization of plentiful Ru(bpy)32+ could be implemented by direct covalently-bonded chelating with Ag2C2O4...
December 11, 2017: ACS Sensors
https://www.readbyqxmd.com/read/29226922/a-polymyxin-b-silver-nanoparticle-colloidal-system-and-the-application-of-lipopolysaccharide-analysis
#16
Tao Liu, Liqian Gao, Jing Zhao, Ya Cao, Yuguo Tang, Peng Miao
Polymyxin B (PMB) is a small cyclic polycationic lipopeptide, which can be used as an antibiotic drug against Gram-negative bacteria. In this work, the interaction between citrate capped silver nanoparticles (AgNPs) and PMB is studied. Experimental results show that the association constant is extremely high and the binding event leads to a significant variation in the localized surface plasmon resonance (LSPR) of AgNPs. Moreover, the PMB-AgNP colloidal system can be further exploited as a sensitive analytical platform...
December 11, 2017: Analyst
https://www.readbyqxmd.com/read/29226730/correction-to-silver-nanoparticle-exposure-in-pregnant-rats-increases-gene-expression-of-tyrosine-hydroxylase-and-monoamine-oxidase-in-offspring-brain
#17
(no author information available yet)
No abstract text is available yet for this article.
October 2017: Drug and Chemical Toxicology
https://www.readbyqxmd.com/read/29225645/the-effects-of-different-ionic-liquid-coatings-and-the-length-of-alkyl-chain-on-antimicrobial-and-cytotoxic-properties-of-silver-nanoparticles
#18
Abbas Abbaszadegan, Ahmad Gholami, Sara Abbaszadegan, Zeynab Sadat Aleyasin, Yasamin Ghahramani, Samira Dorostkar, Bahram Hemmateenejad, Younes Ghasemi, Hashem Sharghi
Introduction: The antibacterial efficacy and toxicity of silver nanoparticles (AgNPs) depends on their physicochemical properties including size, shape, surface charge and surface coatings. The Objectives of this study were: i) To synthesize and characterize positively charged AgNPs coated by different ionic-liquids with different alkyl chain lengths, ii) To evaluate the antimicrobial activity of these nanoparticles against Enterococcus faecalis compared to sodium hypochlorite (NaOCl) and chlorhexidine (CHX), iii) To compare the cytocompatibility of these solutions against L929 mouse fibroblasts...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/29225421/flow-through-microfluidic-immunosensors-with-refractive-index-matched-silica-monoliths-as-volumetric-optical-detection-elements
#19
M S Wiederoder, E L Kendall, J-H Han, R G Ulrich, D L DeVoe
A sensitive and rapid absorbance based immunosensor that utilizes ex situ functionalized porous silica monoliths as volumetric optical detection elements is demonstrated in this study. The porous monolith structure facilitates high capture probe density and short diffusion length scales, enabling sensitive and rapid assays. Silica monoliths, synthesized and functionalized with immunocapture probes off-chip before integration into a sealed thermoplastic microfluidic device, serve to capture target antigens during perfusion through the porous structure...
January 2018: Sensors and Actuators. B, Chemical
https://www.readbyqxmd.com/read/29225181/the-effect-of-green-synthesis-silver-nanoparticles-agnps-from-pulicaria-undulata-on-the-amyloid-formation-in-%C3%AE-lactalbumin-and-the-chaperon-action-of-%C3%AE-casein
#20
Mansoor Dehvari, Arezou Ghahghaei
The formation and deposition of protein fibrillar aggregates in the tissues is associated with several neurodegenerative diseases such as Alzheimer's and Parkinson's disease. Molecular chaperones are a family of proteins that are believed to have the ability to inhibit protein aggregation. The present study examines the effect of different concentrations of green synthesis silver nanoparticles (AgNPs) from Pulicaria undulata L. on the aggregation of α-lactalbumin (α-LA) and the chaperone action of αs-casein...
December 7, 2017: International Journal of Biological Macromolecules
keyword
keyword
24839
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"