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https://www.readbyqxmd.com/read/28551574/toxicity-of-silver-nanoparticles-towards-tumoral-human-cell-lines-u-937-and-hl-60
#1
Anna Barbasz, Magdalena Oćwieja, Maciej Roman
The toxicity of three types of silver nanoparticles towards histiocytic lymphoma (U-937) and human promyelocytic cells (HL-60) was studied. The nanoparticles were synthesized in a chemical reduction method using sodium borohydride. Trisodium citrate and cysteamine hydrochloride were used to generate a negative and positive nanoparticle surface charge. The evaluation of cell viability, membrane integrity, antioxidant activity and the induction of inflammation were used to evaluate the difference in cellular response to the nanoparticle treatment...
May 11, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28551212/dual-crosslinked-poly-vinyl-alcohol-sodium-alginate-silver-nanocomposite-beads-a-promising-antimicrobial-material
#2
Kannan Badri Narayanan, Sung Soo Han
In this paper, we report the immobilization of borate-stabilized silver nanoparticles (AgNPs) as nanofillers in dual-crosslinked polymers comprised of poly(vinyl alcohol) (PVA) and sodium alginate (SA) at different ratios. Ionic-crosslinking using Ca(2+) ions and physical-crosslinking by freeze-thawing were used to entrap silver nanoparticles in the prepared PVA/SA/AgNPs nanocomposite beads. These polymeric nanocomposites were characterized by UV-Vis, XRD, FE-SEM, FT-IR, TGA, and using rheological and swelling properties...
November 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28551122/a-recyclable-silver-ions-specific-surface-enhanced-raman-scattering-sers-sensor
#3
Dan Sun, Guohua Qi, Fanghao Cao, Weiqing Xu, Qidan Chen, Shuping Xu
A highly sensitive and recyclable surface-enhanced Raman scattering (SERS) chip sensor is designed for the determination of silver ions. It is based on the specific reversible binding between silver ions and glucose oxidase (GOD). The sensing chip is made by layer-by-layer assembling GOD on a metal nanoparticle-assembled, SERS-active chip with a positive charged polyelectrolyte as a linker. Iso-alloxazine, a chromophore in flavin adenine dinucleotide (FAD) in GOD, coordinates with silver ions, which causes significant variation in SERS spectra of GOD...
August 15, 2017: Talanta
https://www.readbyqxmd.com/read/28548709/-polka-dot-macrophages-on-cytology-of-bilateral-adrenal-masses-nailing-disseminated-histoplasmosis
#4
Sumit Grover, Pavneet Kaur Selhi, Neena Sood, Ridhi Sood, Harpreet Kaur
Histoplasma capsulatum is a saprophytic fungus that in immunocompetent individuals causes self-limited pulmonary infection; however, in immunosuppressed patients involvement of the reticuloendothelial system, alimentary tract, urinary tract, and central nervous system is fairly common. Rarely patients present with bilateral adrenal masses which mimic tuberculosis and metastasis on radiology because of associated central necrosis. Ultrasound guided FNAC aided by special stains like Periodic Acid Schiff (PAS) and Gomori Methenamine Silver (GMS) may help in early diagnosis in such dubious cases...
May 26, 2017: Diagnostic Cytopathology
https://www.readbyqxmd.com/read/28548705/aeromonas-sobria-an-outbreak-of-natural-infection-in-cultured-silver-catfish-rhamdia-quelen-quoy-gaimard-1824-in-argentina
#5
G A Coscelli, C Casabonne, E Morón-Alcain, N Arancegui, F A Vigliano
No abstract text is available yet for this article.
May 26, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28548685/detection-methods-of-cyprinid-herpesvirus-2-infection-in-silver-crucian-carp-carassius-auratus-gibelio-via-a-porf72-monoclonal-antibody
#6
S Y Kong, Y S Jiang, Q Wang, J F Lu, D Xu, L Q Lu
Cyprinid herpesvirus 2 (CyHV-2) is the main pathogen responsible for causing haematopoietic necrosis disease in Carassius auratus gibelio. Although many nucleic acid-based diagnostic methods have been applied, no stable and sensitive immunological diagnostic approaches have been reported. In this study, to detect CyHV-2 in clinical samples using immunological methods, recombinant ORF72 protein (pORF72), encoded by the CyHV-2 ORF72 gene, was used as a capture antigen to identify blood and tissues infected with CyHV-2...
May 26, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28548674/how-silver-segregation-stabilizes-1d-surface-gold-oxide-a-cluster-expansion-study-combined-with-ab-initio-md-simulations
#7
Sandra Hoppe, Yong Li, Lyudmila V Moskaleva, Stefan Müller
Gold has many unique properties, some of which continue to be uncovered, such as the rich chemistry of gold at the nanoscale. In this study, gold surprises us again by the unusual stability of one-dimensional gold oxide structures on the surface of gold, which enhances in the presence of silver impurities. We employ first-principles calculations to investigate the surface segregation of silver in the presence of atomic-oxygen adsorbates arranged in chains on the Au(321) surface. Such 1D oxide chains have previously been suggested as the most stable form of adsorbed oxygen on gold...
May 26, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28548623/pneumocystis-carinii-infection-with-severe-pneumomediastinum-and-lymph-node-involvement-in-a-whippet-mixed-breed-dog
#8
Christiane Weissenbacher-Lang, Andrea Fuchs-Baumgartinger, Andrea Klang, Sibylle Kneissl, Armin Pirker, Sarina Shibly, Stephanie von Ritgen, Herbert Weissenböck, Frank Künzel
A 3.5-y-old Whippet mixed-breed dog was presented with a history of respiratory distress, exercise intolerance, and generalized demodicosis. Hematologic alterations included marked leukocytosis and neutrophilia. Radiographic examination showed a diffuse interstitial and mild peripheral alveolar lung pattern and pneumomediastinum. Because the cytologic examination of the bronchoalveolar aspirate was not diagnostic and a persistent perforation of the upper respiratory tract could not be ruled out, the dog was submitted to thoracoscopy, and subsequently the left cranial lung lobe as well as mediastinal and sternal lymph nodes were resected...
May 1, 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28548155/silver-mediated-radical-5-exo-dig-cyclization-of-2-alkynylbenzonitriles-synthesis-of-phosphinylated-1-indenones
#9
Xiao-Tong Zhu, Qi Zhao, Feng Liu, Ai-Fang Wang, Pei-Jun Cai, Wen-Juan Hao, Shu-Jiang Tu, Bo Jiang
A new silver-mediated 5-exo-dig cyclization of 2-alkynylbenzonitriles with disubstituted phosphine oxide and H2O has been developed. The reaction enables multiple bond-forming events including C-P, C-C and C-O bonds under atmospheric conditions, leading to the concise and direct formation of 28 examples of phosphorus-containing 1-indenones with generally good yields.
May 26, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28548085/ultrafast-coherence-transfer-in-dna-templated-silver-nanoclusters
#10
Erling Thyrhaug, Sidsel Ammitzbøll Bogh, Miguel R Carro-Temboury, Charlotte Stahl Madsen, Tom Vosch, Donatas Zigmantas
DNA-templated silver nanoclusters of a few tens of atoms or less have come into prominence over the last several years due to very strong absorption and efficient emission. Applications in microscopy and sensing have already been realized, however little is known about the excited-state structure and dynamics in these clusters. Here we report on a multidimensional spectroscopy investigation of the energy-level structure and the early-time relaxation cascade, which eventually results in the population of an emitting state...
May 26, 2017: Nature Communications
https://www.readbyqxmd.com/read/28547844/metal-organic-compound-branched-mos2-for-achieving-high-performance-perovskite-solar-cells
#11
Ruina Dai, Yangyang Wang, Jie Wang, Xianyu Deng
MoS2 as a graphene-like 2D material shows a large potential to replace even overcome graphene in various important applications due to its perfect properties of electrical, optical, frictional, and tunable band gap. However, low solubility in the most of common solvents makes it difficult to prepare via a simple solution process. Here we introduce a metalorganic compound to modify MoS2. Phenyl acetylene silver (PAS) functionalized MoS2 compound is easily dispersed in the solvent of DMF and water. A conductive polymer PEDOT: PSS blend with the MoS2 leads to a significant enhancement of the performance of planar heterojunction perovskite solar cells...
May 25, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28547324/ecotoxicity-and-fate-of-a-silver-nanomaterial-in-an-outdoor-lysimeter-study
#12
Karsten Schlich, Martin Hoppe, Marco Kraas, Elke Fries, Kerstin Hund-Rinke
Sewage sludge is repeatedly applied as fertilizer on farmland due to its high nutrient content. This may lead to a significant increase of silver nanomaterials (AgNM) in soil over years. Therefore, our aim was to investigate the ecotoxicity and fate of AgNM under environmentally relevant conditions in outdoor lysimeters over 25 months. Two AgNM concentrations (1.7 and 8.0 mg/kg dry matter soil) were applied via sewage sludge into soil. In subsamples of the soil, incubated under laboratory conditions for 180 days, the comparability of outdoor and laboratory results regarding ecotoxicity was determined...
May 25, 2017: Ecotoxicology
https://www.readbyqxmd.com/read/28546114/melaleuca-alternifolia-essential-oil-prevents-alterations-to-purinergic-enzymes-and-ameliorates-the-innate-immune-response-in-silver-catfish-infected-with-aeromonas-hydrophila
#13
Matheus D Baldissera, Carine F Souza, Pedro H Doleski, Agueda C de Vargas, Marta M M F Duarte, Thiago Duarte, Aline A Boligon, Daniela B R Leal, Bernardo Baldisserotto
Aeromonas hydrophila infection represents a major impediment to the development of aquaculture, leading to important economic losses. Over the last few years, different methods have been used to counteract and minimize the negative effects of this infection, such as the use of Melaleuca alternifolia essential oil, popularly known as tea tree oil (TTO), that possess a bactericide action against A. hydrophila. The purinergic system develops an important role in the inflammatory response, principally due to involvement of adenosine triphosphate (ATP) in the inflammatory process, as well as by the anti-inflammatory properties of adenosine (Ado), a molecule that is controlled by NTPDase, 5'-nucleotidase and adenosine deaminase (ADA) enzymes...
May 22, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28545996/diversity-of-free-living-marine-ciliates-alveolata-ciliophora-faunal-studies-in-coastal-waters-of-china-during-the-years-2011-2016
#14
REVIEW
Weiwei Liu, Jiamei Jiang, Yuan Xu, Xuming Pan, Zhishuai Qu, Xiaotian Luo, Hamed A El-Serehy, Alan Warren, Honggang Ma, Hongbo Pan
In the period 2011-2016, a series of investigations were carried out on the marine and brackish free-living ciliate fauna of the temperate-tropical coastal waters of China. About 210 morphotypes including over 100 new species within six groups (cyrtophorians, hypotrichs s.l., karyorelicteans, oligotrichs, pleurostomatids, and scuticociliates) were isolated and described in detail from observations of live cells and silver-stained specimens. Based on their morphology, morphogenesis and molecular phylogeny, three new families (Wilbertomorphidae, Kentrophyllidae, Protolitonotidae) and 22 new genera (Apotrachelocerca, Wilbertomorpha, Protolitonotus, Paracyrtophoron, Heterohartmannula, Aporthotrochilia, Falcicyclidium, Paramesanophrys, Pseudodiophrys, Monocoronella, Neourostylopsis, Apobakuella, Parabistichella, Heterokeronopsis, Heterotachysoma, Antiokeronopsis, Apoholosticha, Pseudogastrostyla, Antestrombidium, Sinistrostrombidium, Williophrya, and Varistrombidium) were established...
April 21, 2017: European Journal of Protistology
https://www.readbyqxmd.com/read/28545964/inclusion-of-silver-nanoparticles-for-improving-regenerated-cellulose-membrane-performance-and-reduction-of-biofouling
#15
J Benavente, M E García, N Urbano, J M López-Romero, R C Contreras-Cáceres, M A Casado-Rodríguez, A Moscoso, J Hierrezuelo
The preparation of silver nanoparticles (AgNPs) and their incorporation into the structure of a regenerated cellulose membrane by dip coating is presented. Morphological characterization of the AgNPs (average diameter of 20±2nm) was carried out by SEM/TEM, while elastic, electrical and antimicrobial properties of the hybrid membrane were also analyzed. The presence of silver nanoparticles in the membrane seems to increases its rigidity and its chemical stability against oxidation, but it only induces small changes in the transport parameters...
May 22, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28545622/warfarin-and-the-risk-of-stroke-and-bleeding-in-patients-with-atrial-fibrillation-receiving-dialysis-a-systematic-review-and-meta-analysis
#16
REVIEW
Ziv Harel, Glenn M Chertow, Prakesh S Shah, Shai Harel, Paul Dorian, Andrew T Yan, Gustavo Saposnik, Manish M Sood, Amber O Molnar, Jeffrey Perl, Rachel M Wald, Sam Silver, Ron Wald
BACKGROUND: Patients with atrial fibrillation who receive dialysis are at a high risk of ischemic stroke. The role of warfarin in mitigating this risk in patients with atrial fibrillation who receive dialysis is uncertain. Our objective was to examine the safety and efficacy of warfarin in patients who have atrial fibrillation and receive dialysis. METHODS: We used MedLine, Embase, and the Cochrane Library to conduct a systematic review and meta-analysis of published and unpublished observational and interventional studies related to the use of warfarin in patients with atrial fibrillation who receive dialysis, and provided data on the risk of stroke and/or bleeding outcomes relative to placebo or no anticoagulation therapy...
June 2017: Canadian Journal of Cardiology
https://www.readbyqxmd.com/read/28545356/drug-delivery-systems-for-anti-cancer-active-complexes-of-some-coinage-metals
#17
Ming Zhang, Camille Saint-Germain, Guiling He, Raymond Wai-Yin Sun
Although cisplatin and a number of platinum complexes have widely been used for the treatment of neoplasia, patients receiving these treatments have frequently suffered from their severe toxic side effects, the development of resistance with consequent relapse. In the recent decades, numerous complexes of coinage metals including that of gold, copper and silver have been reported to display promising in vitro and/or in vivo anti-cancer activities as well as potent activities towards cisplatin-resistant tumors...
May 11, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28544887/silver-nanoparticles-in-seawater-a-dynamic-mass-balance-at-part-per-trillion-silver-concentrations
#18
Claudio Toncelli, Kyriaki Mylona, Ioanna Kalantzi, Anastasia Tsiola, Paraskevi Pitta, Manolis Tsapakis, Spiros A Pergantis
This study investigates the dynamic processes affecting silver (Ag) nanoparticles that have been spiked into seawater at environmentally relevant concentrations (200 and 2000ngAgL(-1)). Seawater samples were taken at regular time intervals from multiple microcosm tanks and analysed rapidly, without any sample preparation, using a recently developed flow injection on-line dilution single particle inductively coupled plasma mass spectrometry method. Dissolution was found to be the predominant process of Ag nanoparticle transformation, with its rate being influenced by the type and thickness of the nanoparticle organic coating...
May 22, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28544757/eight-electron-silver-and-mixed-gold-silver-nanoclusters-stabilized-by-se-donor-ligands
#19
Wan-Ting Chang, Po-Yi Lee, Jian-Hong Liao, Samia Kahlal, Jean-Yves Saillard, Chen-Wei Liu
The first atomically and structurally precise silver-nanoclusters stabilized by Se-donor ligands, [Ag20{Se2P(OiPr)2}12] (3) and [Ag21{Se2P(OEt)2}12]+(4), have been isolated by ligand replacement reaction of [Ag20{S2P(OiPr)2}12] (1) and [Ag21{S2P(OiPr)2}12]+ (2), respectively. Further, doping reactions of 4 with Au(PPh3)Cl resulted in the formation of [AuAg20{Se2P(OEt)2}12]+, (5). Structures of 3, 4 and 5 were determined by single crystal X-ray diffraction. The anatomy of cluster 3 with an Ag20 core having C3 symmetry is very similar to that of its dithiophosphate analogue 1...
May 22, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28544392/growth-process-and-anti-cancer-properties-of-gold-nanorods
#20
Junyan Zhang, Mian Wang, Thomas J Webster
Gold nanoparticles have been of great interest due to their unique optical properties, facile synthesis and conjugation. Among various shapes of gold nanoparticles, gold nanorods have been widely studied. They can be conjugated with different molecules for biomedical applications, such as tumor imaging and therapy. However, few researchers have studied the anti-tumor properties of bare gold nanorods. In this study, unfunctionalized gold nanorods were synthesized and tested on breast tumor cells. Results showed that the aspect ratio of gold nanorods could be easily influenced by both reaction time and the amount of silver nitrate in the growth solution...
May 24, 2017: Journal of Biomedical Materials Research. Part A
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