keyword
MENU ▼
Read by QxMD icon Read
search

AgNP

keyword
https://www.readbyqxmd.com/read/28644992/surface-coating-modulated-toxic-responses-to-silver-nanoparticles-in-wolffia-globosa
#1
Xiaoyan Zou, Penghui Li, Jie Lou, Hongwu Zhang
With the omnipresence of silver nanoparticles (AgNPs) in our daily consumer products, their release has raised serious concerns. However, the biochemical mechanisms by which plants counteract the toxicity of nanoparticles are largely unknown. This study investigated the exposure of aquatic Wolffia globosa to ATP-nAg (AgNPs coated with adenosine triphosphate), cit-nAg (AgNPs coated with citrate), and Ag(+). Hill reaction activity was basically lost in W. globosa treated with 10mg/L ATP-nAg and Ag(+), while the activity was still maintained at 38...
June 15, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28642914/antimicrobial-properties-and-dental-pulp-stem-cell-cytotoxicity-using-carboxymethyl-cellulose-silver-nanoparticles-deposited-on-titanium-plates
#2
Martha Alicia Laredo-Naranjo, Roberto Carrillo-Gonzalez, Myriam Angelica De La Garza-Ramos, Marco Antonio Garza-Navarro, Hilda H H Torre-Martinez, Casiano Del Angel-Mosqueda, Roberto Mercado-Hernandez, Roberto Carrillo-Fuentevilla
Objective: To evaluate the antimicrobial properties and dental pulp stem cells (DPSCs) cytotoxicity of synthesized carboxymethyl cellulose-silver nanoparticles impregnated on titanium plates. Material and methods: The antibacterial effect of silver nanoparticles in a carboxymethyl cellulose matrix impregnated on titanium plates (Ti-AgNPs) in three concentrations: 16%, 50% and 100% was determined by adding these to bacterial cultures of Streptococcus mutans and Porphyromonas gingivalis. The Ti-AgNPs cytotoxicity on DPSCs was determined using a fluorimetric cytotoxicity assay with 0...
December 2016: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28635254/sudoku-like-lab-on-paper-cyto-device-with-dual-enhancement-of-electrochemiluminescence-intermediates-strategy
#3
Hongmei Yang, Yan Zhang, Li Li, Lina Zhang, Feifei Lan, Jinghua Yu
This paper describes the design and construction of sudoku-like lab-on-paper platform, in which dual enhancement of reaction intermediates strategy was incorporated for multiplexed competitive electrochemiluminescence (ECL) cyto-assay. Benefit from the sudoku-like structure, integrated multifunction were obtained on such elaborately devised platform, including specific reagents storage, multiple samples immobilization, residual automatic washing, and signal collection. By utilizing semicarbazide (SE) and silver nanoparticles (AgNPs) as dual enhancers, more ECL intermediates could be obtained in the graphene quantum dots (GQDs) and peroxydisulfate system, resulting in the production of more excited state GQDs to emit light...
June 21, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28634763/results-of-an-interlaboratory-method-performance-study-for-the-size-determination-and-quantification-of-silver-nanoparticles-in-chicken-meat-by-single-particle-inductively-coupled-plasma-mass-spectrometry-sp-icp-ms
#4
Stefan Weigel, Ruud Peters, Katrin Loeschner, Ringo Grombe, Thomas P J Linsinger
Single-particle inductively coupled plasma mass spectrometry (sp-ICP-MS) promises fast and selective determination of nanoparticle size and number concentrations. While several studies on practical applications have been published, data on formal, especially interlaboratory validation of sp-ICP-MS, is sparse. An international interlaboratory study was organized to determine repeatability and reproducibility of the determination of the median particle size and particle number concentration of Ag nanoparticles (AgNPs) in chicken meat...
June 20, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28634713/characterization-and-in-vitro-antibacterial-activity-of-saponin-conjugated-silver-nanoparticles-against-bacteria-that-cause-burn-wound-infection
#5
Anbarasan Muniyan, Kalaiselvi Ravi, Udayamathi Mohan, Rajasekar Panchamoorthy
Saponins are glycosides, which destabilize the membrane by altering the membrane permeability. Thus, the present study was aimed to fabricate the silver nanoparticles (AgNPs) using fenugreek derived saponin (SN) against multi-drug resistant bacteria. This study has optimized the concentration of SN (240 mg/mL) for the synthesis of an effective AgNPs against the test organism Escherichia coli. The SN reduced AgNPs produced a reddish-brown colour and displayed UV absorption at 416 nm. The bio-reducing efficiency of SN (62...
July 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28633660/a-re-assessment-of-the-safety-of-silver-in-household-water-treatment-rapid-systematic-review-of-mammalian-in-vivo-genotoxicity-studies
#6
REVIEW
Lorna Fewtrell, Batsirai Majuru, Paul R Hunter
BACKGROUND: Despite poor evidence of their effectiveness, colloidal silver and silver nanoparticles are increasingly being promoted for treating potentially contaminated drinking water in low income countries. Recently, however, concerns have been raised about the possible genotoxicity of particulate silver. OBJECTIVES: The goal of this paper was to review the published mammalian in vivo genotoxicity studies using silver micro and nanoparticles. METHODS: SCOPUS and Medline were searched using the following search string: ("DNA damage" OR genotox* OR Cytotox* OR Embryotox*) AND (silver OR AgNP)...
June 20, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28629073/in-vitro-and-in-vivo-anti-inflammatory-properties-of-green-synthesized-silver-nanoparticles-using-viburnum-opulus-l-fruits-extract
#7
Bianca Moldovan, Luminita David, Adriana Vulcu, Liliana Olenic, Maria Perde-Schrepler, Eva Fischer-Fodor, Ioana Baldea, Simona Clichici, Gabriela Adriana Filip
A green, rapid and cost effective method for the bio-synthesis of silver nanoparticles (AgNPs), using polyphenols present in European cranberry bush fruit extracts was developed. The obtained AgNPs were characterized by ultra-violet visible spectroscopy (UV-VIS), Fourier transform - infrared spectroscopy (FT-IR), transmission electron microscopy (TEM) and X-ray diffraction patterns (XRD). The average size of the spherical AgNPs was found to be 25nm. The anti-inflammatory effect of the biomaterials was investigated, both in vitro (on HaCaT cell line, exposed to UVB radiation) and in vivo (on acute inflammation model in Wistar rats)...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28629002/a-facile-synthesis-method-of-hydroxyethyl-cellulose-silver-nanoparticle-scaffolds-for-skin-tissue-engineering-applications
#8
Farah Hanani Zulkifli, Fathima Shahitha Jahir Hussain, Senait Sileshi Zeyohannes, Mohammad Syaiful Bahari Abdull Rasad, Mashitah M Yusuff
Green porous and ecofriendly scaffolds have been considered as one of the potent candidates for tissue engineering substitutes. The objective of this study is to investigate the biocompatibility of hydroxyethyl cellulose (HEC)/silver nanoparticles (AgNPs), prepared by the green synthesis method as a potential host material for skin tissue applications. The substrates which contained varied concentrations of AgNO3 (0.4%-1.6%) were formed in the presence of HEC, were dissolved in a single step in water. The presence of AgNPs was confirmed visually by the change of color from colorless to dark brown, and was fabricated via freeze-drying technique...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28628993/the-impact-of-silver-nanoparticles-on-marine-plankton-dynamics-dependence-on-coating-size-and-concentration
#9
Anastasia Tsiola, Paraskevi Pitta, Agnès Junyer Callol, Margarita Kagiorgi, Ioanna Kalantzi, Kyriaki Mylona, Ioulia Santi, Claudio Toncelli, Spyros Pergantis, Manolis Tsapakis
During this study, three microcosm experiments were carried out with natural coastal seawater, collected in the Eastern Mediterranean Sea, in order to assess the effect of silver nanoparticle (AgNP) exposure to natural plankton communities. The impact of coating (branched-polyethyleneimine: BPEI vs. poly-vinylpyrrolidone: PVP), size (40 vs. 60nm), concentration (200, 500, 2000, 5000 and 10,000ng Ag L(-1)) and silver form (dissolved Ag(+) vs. AgNPs) were tested. The results of chlorophyll a concentration revealed that PVP AgNPs caused a higher toxicity than BPEI AgNPs, and this was possibly related to the measured higher dissolution rate...
June 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28628747/laser-ablation-of-silver-in-liquid-organic-monomer-influence-of-experimental-parameters-on-the-synthesized-silver-nanoparticles-graphite-colloids
#10
Maxime Delmée, Gregory Mertz, Julien Bardon, Adeline Marguier, Lydie Ploux, Vincent Roucoules, David Ruch
During the last decade, synthesizing silver nanoparticles (Ag NPs) by Liquid Phase-Pulsed Laser Ablation (LP-PLA) has attracted a lot of attention. Basically, this technique allows producing various metallic nanoparticles with controlled size, shape, composition or surroundings in several liquids (i.e.: water, ethanol, acetone, toluene,…). Recently, such processes have been studied in liquid organic monomer such as methyl methacrylate (MMA). However, the influence of the laser parameters on the materials synthesised in such reactive liquid and their features were not fully investigated so far...
June 19, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28628134/-effects-of-silver-nanoparticle-on-hemichannel-activation-and-anti-proliferation-in-hacat-cells
#11
D Yang, J H Xu, F R Deng, X B Guo
OBJECTIVE: To investigate the effect of silver nanoparticles (AgNPs) on hemichannel activity in human skin keratinocytes (HaCaT) and to explore the role of hemichannel in AgNP-induced anti-proliferative effect on HaCaT cells. METHODS: HaCaT cells were exposed to 0, 0.1, 0.2, 1.0, 5.0, 10.0, 15.0 and 20.0 μg/cm(2) of AgNPs for 24 h and cell viability was assessed by propidium iodide (PI) staining with flow cytometry. Hemichannel activity was examined by ethidium bromide (EB) uptake experiments in cells exposed to AgNPs with and without hemichannel inhibitor carbenoxolone (CBX)...
June 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28627335/effects-of-exposure-pathways-on-the-accumulation-and-phytotoxicity-of-silver-nanoparticles-in-soybean-and-rice
#12
Cheng-Cheng Li, Fei Dang, Min Li, Min Zhu, Huan Zhong, Holger Hintelmann, Dong-Mei Zhou
The widespread use of silver nanoparticles (AgNPs) raises concerns both about their accumulation in crops and human exposure via crop consumption. Plants take up AgNPs through their leaves and roots, but foliar uptake has been largely ignored. To better understand AgNPs-plant interactions, we compared the uptake, phytotoxicity, and size distribution of AgNPs in soybean and rice following root versus foliar exposure. At similar AgNP application levels, foliar exposure led to 17-200 times more Ag bioaccumulation than root exposure...
June 19, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28625837/enhanced-corrosion-inhibition-effect-of-chitosan-for-st37-in-15-h2so4-environment-by-silver-nanoparticles
#13
Moses M Solomon, Husnu Gerengi, Tugce Kaya, Saviour A Umoren
The inhibitive performance of chitosan and silver nanoparticles - chitosan (AgNPs-Chi) composite towards St37 steel corrosion in 15% H2SO4 solution was studied using weight loss and electrochemical techniques in addition to surface morphological examination. Results obtained show thatchitosan could fairly protect St37 steel surface by 45%. Inhibition efficiency above 94% has been achieved with AgNPs-Chi composite. AgNPs-Chi composite performs better at longer immersion time and elevated temperature. AgNPs-Chi retards both anodic and cathodic redox reactions...
June 15, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28622805/nanomolar-sensitive-colorimetric-assay-for-mn-2-using-cysteic-acid-capped-silver-nanoparticles-and-theoretical-investigation-of-its-sensing-mechanism
#14
Yan-Xia Qi, Zhi-Bei Qu, Qi-Xian Wang, Min Zhang, Guoyue Shi
A new facile, rapid, sensitive and selective colorimetric assay is proposed for the determination of manganese ions (Mn(2+)) utilizing cysteic acid (CA)-capped silver nanoparticles (CA-AgNPs) as colorimetric probes. The CA-AgNPs were prepared by reducing AgNO3 with NaBH4 in the presence of CA as the capping ligand. The presence of Mn(2+) induces the quick aggregation of CA-AgNPs, associated with notable color changes of the CA-AgNPs solution from yellow to dark green. The Mn(2+) can form a coordinated structure with CA capping on the AgNPs and leads to formation of large particles aggregation...
August 8, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28620192/luminescent-turn-on-detection-of-hg-ii-via-the-quenching-of-an-iridium-iii-complex-by-hg-ii-mediated-silver-nanoparticles
#15
Jinshui Liu, Kasipandi Vellaisamy, Guanjun Yang, Chung-Hang Leung, Dik-Lung Ma
A novel luminescent turn-on detection method for Hg(II) was developed. The method was based on the silver nanoparticle (AgNP)-mediated quenching of Ir(III) complex 1. The addition of Hg(II) ions causes the luminescence of complex 1 to be recovered due to the oxidation of AgNPs by Hg(II) ions to form Ag(I) and Ag/Hg amalgam. The luminescence intensity of 1 increased in accord with an increased Hg(II) concentration ranging from 0 nM to 180 nM, with the detection limit of 5 nM. This approach offers an innovative method for the quantification of Hg(II)...
June 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28619637/preparation-and-characterization-of-silk-sericin-pva-blend-film-with-silver-nanoparticles-for-potential-antimicrobial-application
#16
Huawei He, Rui Cai, Yejing Wang, Gang Tao, Pengchao Guo, Hua Zuo, Liqun Chen, Xinyu Liu, Ping Zhao, Qingyou Xia
Sericin has great potentials in biomedical applications for its good reactive activity, biocompatibility and biodegradability. However, the undesirable mechanical performance limits its application. Here, we developed a green, facile and economic approach to prepare sericin/polyvinyl alcohol (PVA) blend film. Further, silver nanoparticles (AgNPs) were synthesized in situ on the surface of sericin/PVA film via UV-assisted green synthesis method. Mechanical performance, swelling, mass losing and water retention tests showed the blend film had good mechanical performance, hygroscopicity, water retention capacity and low mass losing ratio...
June 12, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28618895/silver-nanoparticles-inhaled-during-pregnancy-reach-and-affect-the-placenta-and-the-foetus
#17
Luisa Campagnolo, Micol Massimiani, Lucia Vecchione, Diletta Piccirilli, Nicola Toschi, Andrea Magrini, Elena Bonanno, Manuel Scimeca, Luca Castagnozzi, Giorgio Buonanno, Luca Stabile, Francesco Cubadda, Federica Aureli, Paul Hb Fokkens, Wolfgang G Kreyling, Flemming R Cassee, Antonio Pietroiusti
Recently, interest for the potential impact of consumer-relevant engineered nanoparticles on pregnancy has dramatically increased. This study investigates whether inhaled silver nanoparticles (AgNPs) reach and cross mouse placental barrier and induce adverse effects. Apart from their relevance for the growing use in consumer products and biomedical applications, AgNPs are selected since they can be unequivocally identified in tissues. Pregnant mouse females are exposed during the first 15 days of gestation by nose-only inhalation to a freshly produced aerosol of 18-20 nm AgNPs for either 1 or 4 hours, at a particle number concentration of 3...
June 16, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28617070/oral-subchronic-exposure-to-silver-nanoparticles-causes-renal-damage-through-apoptotic-impairment-and-necrotic-cell-death
#18
Ratnakar Tiwari, Radha Dutt Singh, Hafizurrahman Khan, Siddhartha Gangopadhyay, Sandeep Mittal, Vikas Singh, Nidhi Arjaria, Jai Shankar, Somendu Kumar Roy, Dhirendra Singh, Vikas Srivastava
Silver nanoparticles (AgNPs) are one of the most widely used nanomaterials. Following oral exposure, AgNPs can accumulate in various organs including kidneys where they show gender specific accumulation. There is limited information on their effect on renal system following long-term animal exposure especially at the ultramicroscopic and molecular level. In this study, we have assessed the effect of 60 days oral AgNPs treatment on kidneys of female Wistar rats at doses of 50 ppm and 200 ppm that are below previously reported lowest observed adverse effect level (LOAEL)...
June 15, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28613815/self-assembled-exopolysaccharide-nanoparticles-for-bioremediation-and-green-synthesis-of-noble-metal-nanoparticles
#19
Chengcheng Li, Le Zhou, Hang Yang, Roujing Lv, Peilong Tian, Xu Li, Yaqin Zhang, Zhan Chen, Fengming Lin
Continuing efforts have been made to explore novel exopolysaccharides (EPSs) for valuable applications. In this research we report for the first time that a novel non-glucan EPS named EPS-605 can self-assemble to form spherical nano-size particles with ~88 nm, expanding both the EPS types and the structural types that EPS self-assemble into. Characterization of EPS-605 shows that it was made of mannose, glucose and galactose with several modifications including acylation, phosphorylation, sulfation, and carboxylation, and a highly negative charge...
June 14, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28612655/exploiting-antidiabetic-activity-of-silver-nanoparticles-synthesized-using-punica-granatum-leaves-and-anticancer-potential-against-human-liver-cancer-cells-hepg2
#20
Rijuta G Saratale, Han Seung Shin, Gopalakrishnan Kumar, Giovanni Benelli, Dong-Su Kim, Ganesh D Saratale
This study first time reports the novel synthesis of silver nanoparticles (AgNPs) using a Punica granatum leaf extract (PGE). The synthesized AgNPs were characterized by various analytical techniques including UV-Vis, Fourier transform infrared (FTIR), X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy and energy-dispersive spectra (FESEM-EDS) and high-resolution transmission electron microscopy (HRTEM). FTIR analysis revealed that the involvement of biological macromolecules of P...
June 14, 2017: Artificial Cells, Nanomedicine, and Biotechnology
keyword
keyword
24838
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"