Showing 1-30 of 113 resultados for "GF50324745"
Hongyan Zhao et al.
Journal of nanoscience and nanotechnology, 14(6), 4357-4362 (2014-04-18)
The influence of 12 nm spherical silver nanoparticles (AgNPs) and 20 nm spherical gold nanoparticles (AuNPs) on the luminescence of europium complex Eu(TTFA)3 were studied. When 350 nm is chosen as the incident light, the maximum enhancement factor of the...
A Rosenblatt et al.
Journal of dental research, 88(2), 116-125 (2009-03-13)
The antimicrobial use of silver compounds pivots on the 100-year-old application of silver nitrate, silver foil, and silver sutures for the prevention and treatment of ocular, surgical, and dental infections. Ag(+) kills pathogenic organisms at concentrations of <50 ppm, and...
Svitlana Chernousova et al.
Angewandte Chemie (International ed. in English), 52(6), 1636-1653 (2012-12-21)
The antibacterial action of silver is utilized in numerous consumer products and medical devices. Metallic silver, silver salts, and also silver nanoparticles are used for this purpose. The state of research on the effect of silver on bacteria, cells, and...
M Baalousha et al.
The Science of the total environment, 502, 344-353 (2014-09-30)
Silver nanoparticles (Ag NPs) are susceptible to transformations in environmental and biological media such as aggregation, oxidation, dissolution, chlorination, sulfidation, formation/replacement of surface coatings following interaction with natural organic matter (NOM). This paper investigates the impact of surface coating and...
Wen-Wei Zhang et al.
Journal of colloid and interface science, 268(1), 173-180 (2003-11-13)
Self-assembled monolayers (SAMs) of functionalized azobenzene thiols (RAzoCnSH, n=3-6 for R=H, abbreviated as AzoCnSH; and n=4 for R=CH(3)CONH, abbreviated as aaAzoC4SH) on different substrates RAzoCnSz.sbnd;z.sfnc;S (S represents substrates of vacuum-deposited gold (Au), silver foil (Ag), HNO(3) etched silver foil (EAg)...
Cherrie M Whiteley et al.
Environmental science. Processes & impacts, 15(11), 2050-2058 (2013-09-24)
There are significant challenges in assessing the fate and exposure of nanoparticles (NPs) in the environment owing to the lack of information on their use, potential pathways and sinks in the environment. In order to better understand the environmental exposure...
Cheng-Kuan Su et al.
Toxicology letters, 227(2), 84-90 (2014-04-08)
With the increasing prevalence of silver nanoparticles (AgNPs) in various products, whether such AgNPs will introduce new injury mechanisms from new pathologies remains to be determined. From the toxicokinetic viewpoint, it is vital to have in-depth knowledge of their in...
Kheyrollah Khosravi Katuli et al.
Ecotoxicology and environmental safety, 106, 173-180 (2014-05-21)
Silver nanoparticles (AgNPs) are the most commonly used metallic nanoparticles in industrial applications, including medical and consumer products. In the recent years, however, concerns regarding their environmental and health impacts have emerged. Aquatic organisms are of special concern since water...
Mukul Das et al.
Food additives and contaminants, 22(12), 1219-1223 (2005-12-17)
The use of silver foils in various food preparations is a common practice in Middle Eastern and South East Asian countries. The FAO/WHO Joint Expert Committee on Food Additives (JECFA) has included silver in the list of food additives, but...
Alexandru I Petrisor et al.
International journal of molecular sciences, 15(1), 850-877 (2014-01-15)
Microspatial arrangements of sulfate-reducing microorganisms (SRM) in surface microbial mats (~1.5 mm) forming open marine stromatolites were investigated. Previous research revealed three different mat types associated with these stromatolites, each with a unique petrographic signature. Here we focused on comparing...
Junpeng Shi et al.
Toxicology letters, 229(1), 17-24 (2014-06-10)
Humans face the risk of exposure to silver nanoparticles (AgNPs) due to their extensive application in consumer products. AgNPs can interact with many substances in the human body due to their chemically unstable nature and high activity properties, which might...
Cheng Yang et al.
Physical chemistry chemical physics : PCCP, 12(43), 14459-14461 (2010-10-01)
This communication describes a new surface-enhanced Raman scattering (SERS) active silver substrate prepared by iodination of the evaporated silver foil. After iodination, the morphology of the silver substrate undergoes a self-evolution process in which it displays accordingly the UV-vis absorption...
Amin Majdalawieh et al.
Journal of nanoscience and nanotechnology, 14(7), 4757-4780 (2014-04-25)
In the last decade, gold and silver nanomaterials have received considerable attention due to their attractive electronic and chemical properties and their potential applications in the development of new technologies. Recent advances in the study of various gold and silver...
Swapna A Gudipaty et al.
Biochimica et biophysica acta, 1844(9), 1656-1661 (2014-06-21)
The Cus system of Escherichia coli aids in protection of cells from high concentrations of Ag(I) and Cu(I). The histidine kinase CusS of the CusRS two-component system functions as a Ag(I)/Cu(I)-responsive sensor kinase and is essential for induction of the...
Takuya Nishioka et al.
Ultrasonics, 57, 84-89 (2014-12-04)
A thermophone is a thermoacoustic transducer, which generates sound via time-varying Joule heating of an electrically conductive layer, which leads to expansion and contraction of a small pocket of air near the surface of the film. In this work, a...
Swarup Roy et al.
Journal of nanoscience and nanotechnology, 14(7), 4899-4905 (2014-04-25)
Binding interaction of biologically synthesized silver nanoparticles with bovine serum albumin (BSA) has been investigated by UV-Vis and fluorescence spectroscopic techniques. UV-Vis analysis implies the formation of the ground state complex between BSA and silver nanoparticles. The analysis of fluorescence...
Jiawen Hu et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 58(13), 2827-2834 (2002-12-13)
Surface-enhanced Raman scattering (SERS) of 4-mercaptopyridine (4-mpy) adsorbed on HNO3 etched silver foil, chemically deposited silver films (silver mirror) and silver colloids were measured. The SERS study has revealed that 4-mpy was adsorbed onto the three kinds of silver surfaces...
Zhiping Zhuang et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 72(5), 954-958 (2009-02-03)
Surface-enhanced Raman scattering (SERS) of 4,4'-azopyridine (AZPY) on silver foil substrate was measured under 1064nm excitation lines. Density-functional theory (DFT) methods were used to calculate the structure and vibrational spectra of models such as Ag-AZPY, Ag(4)-AZPY and Ag(6)-AZPY complexes with...
M Yazdimamaghani et al.
Journal of biomedical nanotechnology, 10(6), 911-931 (2014-04-23)
A new composition of gelatin/bioactive-glass/silver nanoparticle was synthesized and employed to prepare antibacterial macroporous scaffolds with potential applications in bone tissue engineering. A set of macroporous nanocomposite scaffolds were developed from an aqueous solution of gelatin by freeze-drying and crosslinking...
Ana López-Serrano Oliver et al.
Environmental pollution (Barking, Essex : 1987), 189, 87-91 (2014-03-20)
Silver nanoparticles (AgNPs) are widely used in many applications and likely released into the aquatic environment. There is increasing evidence that Ag is efficiently delivered to aquatic organisms from AgNPs after aqueous and dietary exposures. Accumulation of AgNPs through the...
Elizabeth I Maurer et al.
Nanotoxicology, 8(7), 718-727 (2013-07-16)
In the field of toxicology of nanomaterials, scientists have not clearly determined if the observed toxicological events are due to the nanoparticles (NPs) themselves or the dissolution of ions released into the biophysiological environment or both phenomenon participate in combination...
Florian Mallevre et al.
Environmental pollution (Barking, Essex : 1987), 195, 218-225 (2014-09-28)
Bacteria based ecotoxicology assessment of manufactured nanoparticles is largely restricted to Escherichia coli bioreporters in laboratory media. Here, toxicity effects of model OECD nanoparticles (Ag NM-300K, ZnO NM-110 and TiO2 NM-104) were assessed using the switch-off luminescent Pseudomonas putida BS566::luxCDABE...
S R Mueller-Spitz et al.
Letters in applied microbiology, 58(4), 330-337 (2013-11-30)
Polycyclic aromatic hydrocarbons (PAH) are a common environmental contaminant originating from both anthropogenic and natural sources. Mycobacterium species are highly adapted to utilizing a variety of PAH. Silver nanoparticles (AgNP) are an emerging contaminant that possess bactericidal properties, interferes with...
Hongjun Liu et al.
Journal of water and health, 12(4), 670-677 (2014-12-05)
Pathogenic bacteria are one of the main reasons for worldwide water-borne disease causing a big threat to public health, hence there is an urgent need to develop cost-effective water treatment technologies. Nano-materials in point-of-use systems have recently attracted considerable research...
Alexandros Besinis et al.
Nanotoxicology, 8(7), 745-754 (2013-07-24)
The survival of pathogenic bacteria in the oral cavity depends on their successful adhesion to dental surfaces and their ability to develop into biofilms, known as dental plaque. Bacteria from the dental plaque are responsible for the development of dental...
Yang Liu et al.
Chemosphere, 112, 282-288 (2014-07-23)
Metals are always found in the environment as mixtures rather than as solitary elements. However, effect models such as biotic ligand models (BLMs) are usually derived for toxicity prediction of single metals. Our study aimed at predicting mixture toxicity of...
Nanobio silver: its interactions with peptides and bacteria, and its uses in medicine.
Sonja Eckhardt et al.
Chemical reviews, 113(7), 4708-4754 (2013-03-16)
Dawei Guo et al.
Journal of biomedical nanotechnology, 10(4), 669-678 (2014-04-17)
Several studies have suggested that silver nanoparticles (AgNPs) have the potential to treat human cancers, including leukemia. However, the detailed cellular mechanisms for AgNPs to inhibit the growth of leukemic cells and their efficacy on clinical isolates of leukemic patients...
Maria C Siqueira et al.
Journal of nanoscience and nanotechnology, 14(7), 5512-5517 (2014-04-25)
In this study, silver nanoparticles were prepared and incorporated into carboxymethylcellulose films to evaluate the antimicrobial activity for food packaging applications. The techniques carried out for material characterization were: infrared spectroscopy and thermal analysis for the silver nanoparticles and films...
Yu Sun et al.
Journal of nanoscience and nanotechnology, 14(6), 4481-4485 (2014-04-18)
The fluorescence enhancement effect of Rh6G molecules deposited on the silver film substrate decorated with nanohole arrays was investigated in this paper. The prepared substrate, decorated with nanohole arrays, was fabricated with the deposition of silver films onto the anodic...

Redes sociais

LinkedIn icon
Twitter icon
Facebook Icon
Instagram Icon


Pesquisa. Desenvolvimento. Produção.

Somos um fornecedor global líder para o setor de ciências biológicas, com soluções e serviços para pesquisa, desenvolvimento e produção de biotecnologia, além de produção e desenvolvimento de terapias farmacológicas com medicamentos.

© 2021 Merck KGaA, Darmstadt, Alemanha e/ou suas filiais. Todos os direitos reservados.

A reprodução não autorizada de quaisquer materiais deste site é estritamente proibida.