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https://www.readbyqxmd.com/read/28323989/preconception-low-dose-aspirin-restores-diminished-pregnancy-and-live-birth-rates-in-women-with-low-grade-inflammation-a-secondary-analysis-of-a-randomized-trial
#1
Lindsey A Sjaarda, Rose G Radin, Robert M Silver, Emily Mitchell, Sunni L Mumford, Brian Wilcox, Noya Galai, Neil J Perkins, Jean Wactawski-Wende, Joseph B Stanford, Enrique F Schisterman
Context: Inflammation is linked to causes of infertility. Low dose aspirin (LDA) may improve reproductive success in women with chronic, low-grade inflammation. Objective: To investigate the effect of preconception-initiated LDA on pregnancy rate, pregnancy loss, live birth rate, and inflammation during pregnancy. Design: Stratified secondary analysis of a multi-center, block-randomized, double-blind, placebo-controlled trial. Setting: Four U...
February 3, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28321991/atomic-layer-deposition-of-a-silver-nanolayer-on-advanced-titanium-orthopedic-implants-inhibits-bacterial-colonization-and-supports-vascularized-de-novo-bone-ingrowth
#2
Aine Devlin-Mullin, Naomi M Todd, Zahra Golrokhi, Hua Geng, Moritz A Konerding, Nigel G Ternan, John A Hunt, Richard J Potter, Chris Sutcliffe, Eric Jones, Peter D Lee, Christopher A Mitchell
Joint replacement surgery is associated with significant morbidity and mortality following infection with either methicillin-resistant Staphylococcus aureus (MRSA) or Staphylococcus epidermidis. These organisms have strong biofilm-forming capability in deep wounds and on prosthetic surfaces, with 10(3) -10(4) microbes resulting in clinically significant infections. To inhibit biofilm formation, we developed 3D titanium structures using selective laser melting and then coated them with a silver nanolayer using atomic layer deposition...
March 21, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28319898/immunodetection-of-salivary-biomarkers-by-an-optical-microfluidic-biosensor-with-polyethylenimine-modified-polythiophene-c70-organic-photodetectors
#3
Tao Dong, Nuno Miguel Matos Pires
This work reports a novel optical microfluidic biosensor with highly sensitive organic photodetectors (OPDs) for absorbance-based detection of salivary protein biomarkers at the point of care. The compact and miniaturized biosensor has comprised OPDs made of polythiophene-C70 bulk heterojunction for the photoactive layer; whilst a calcium-free cathode interfacial layer, made of linear polyethylenimine, was incorporated to the photodetectors to enhance the low cost. The OPDs realized onto a glass chip were aligned to antibody-functionalized chambers of a poly(methyl methacrylate) microfluidic chip, in where immunogold-silver assays were conducted...
March 6, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28319867/phototherapeutic-spectrum-expansion-through-synergistic-effect-of-mesoporous-silica-trio-nanohybrids-against-antibiotic-resistant-gram-negative-bacterium
#4
Yaswanth Kuthati, Ranjith Kumar Kankala, Prabhakar Busa, Shi-Xiang Lin, Jin-Pei Deng, Chung-Yuan Mou, Chia-Hung Lee
The extensive impact of antibiotic resistance has led to the exploration of new anti-bacterial modalities. We designed copper impregnated mesoporous silica nanoparticles (Cu-MSN) with immobilizing silver nanoparticles (SNPs) to apply photodynamic inactivation (PDI) of antibiotic-resistant E. coli. SNPs were decorated over the Cu-MSN surfaces by coordination of silver ions on diamine-functionalized Cu-MSN and further reduced to silver nanoparticles with formalin. We demonstrate that silver is capable of sensitizing the gram-negative bacteria E...
March 7, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28319860/effects-of-silver-nanoparticles-on-survival-biomass-change-and-avoidance-behaviour-of-the-endogeic-earthworm-allolobophora-chlorotica
#5
C Brami, A R Glover, K R Butt, C N Lowe
Increasing commercial application of silver nanoparticles (Ag NP) and subsequent presence in wastewater and sewage sludge has raised concerns regarding their effects in the aquatic and terrestrial environment. Several studies have employed standardised acute and chronic earthworm-based tests to establish the toxicological effects of Ag NP within soil. These studies have relied heavily on the use of epigiec earthworm species which may have limited ecological relevance in mineral soil. This study assessed the influence of Ag NP (uncoated 80nm powder) and AgNO3 on survival, change in biomass and avoidance behaviour in a soil dwelling (endogiec) species, Allolobophora chlorotica...
March 15, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28319742/biochar-provides-a-safe-and-value-added-solution-for-hyperaccumulating-plant-disposal-a-case-study-of-phytolacca-acinosa-roxb-phytolaccaceae
#6
Shengsen Wang, Bin Gao, Yuncong Li, Yong Sik Ok, Chaofeng Shen, Shengguo Xue
In this work, an innovative approach using biochar technology for hyperaccumulator disposal was developed and evaluated. The heavy metal enriched P. acinosa biomass (PBM) was pyrolyzed to produce biochar (PBC). Both PBM and PBC were characterized with X-ray diffraction (XRD) for crystal phases, scanning electron microscopy (SEM) for surface topography, and analyzed for elemental composition and mobility. The results revealed that whewellite, a dominant crystal form in biomass, was decomposed to calcite after pyrolysis...
February 27, 2017: Chemosphere
https://www.readbyqxmd.com/read/28319666/full-color-generation-using-silver-tandem-nanodisks
#7
Hao Wang, Xiaolong Wang, Chen Yan, Hua Zhao, Jingwen Zhang, Christian Santschi, Olivier J F Martin
Plasmonic effects associated with metallic nanostructures have been widely studied for color generation. It became apparent that highly saturated and bright colors are hard to obtain and very small nanostructures need to be fabricated. To address this issue, in this study we employ metal-insulator-metal sandwich nanodisks that support enhanced in-phase electric dipole modes, which are blue shifted with respect to a single metal disk. The blue shift enables the generation of short wavelength colors with larger nanostructures...
March 20, 2017: ACS Nano
https://www.readbyqxmd.com/read/28318795/mechanisms-of-toxic-action-of-silver-nanoparticles-in-the-protozoan-tetrahymena-thermophila-from-gene-expression-to-phenotypic-events
#8
Katre Juganson, Monika Mortimer, Angela Ivask, Sandra Pucciarelli, Cristina Miceli, Kaja Orupõld, Anne Kahru
Silver nanoparticles (AgNPs) are highly toxic to aquatic organisms, however, there is no consensus whether the toxicity is caused solely by released Ag-ions or also by reactive oxygen species (ROS). Here, the effects of protein-coated AgNPs (14.6 nm, Collargol) were studied on viability, oxidative stress and gene expression levels in wild type strains (CU427 and CU428) of ciliate Tetrahymena thermophila. Viability-based 24 h EC50 values of AgNPs were relatively high and significantly different for the two strains: ∼100 mg/L and ∼75 mg/L for CU427 and CU428, respectively...
March 16, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28318347/teratogenic-hazard-of-bpei-coated-silver-nanoparticles-to-xenopus-laevis
#9
Anita Colombo, Melissa Saibene, Elisa Moschini, Patrizia Bonfanti, Maddalena Collini, Kaja Kasemets, Paride Mantecca
Silver nanoparticles (AgNPs) are among the most exploited antimicrobial agents and are used in many consumer products. Size and surface reactivity are critical physico-chemical properties responsible for NPs toxicity, and surface coatings, often used to functionalize or stabilize AgNPs, can influence their toxic profile and biocompatibility. In the current study the developmental toxicity of 1) negatively charged citrate-coated AgNPs (Cit-AgNPs), 2) positively charged branched polyethylenimine-coated AgNPs (BPEI-AgNPs), and 3) Ag(+) (from 0...
March 20, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28318247/metalized-nanocellulose-composites-as-a-feasible-material-for-membrane-supports-design-and-applications-for-water-treatment
#10
Perla Cruz-Tato, Edwin O Ortiz-Quiles, Karlene Vega-Figueroa, Liz Noemi Santiago-Martoral, Michael Flynn, Liz M Diaz-Vazquez, Eduardo Nicolau
Herein, we study the feasibility of using nanocellulose (NC)-based composites with silver and platinum nanoparticles as additive materials to fabricate the support layer of thin film composite (TFC) membranes for water purification applications. In brief, the NC surface was chemically modified and then was decorated with silver and platinum nanoparticles, respectively by chemical reduction. These metalized nanocellulose composites (MNC) were characterized by several techniques including: FTIR, XPS, TGA, XRD and XANES to probe their integrity...
March 20, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28318121/high-performance-doped-silver-films-overcoming-fundamental-material-limits-for-nanophotonic-applications
#11
Cheng Zhang, Nathaniel Kinsey, Long Chen, Chengang Ji, Mingjie Xu, Marcello Ferrera, Xiaoqing Pan, Vladimir M Shalaev, Alexandra Boltasseva, L Jay Guo
The field of nanophotonics has ushered in a new paradigm of light manipulation by enabling deep subdiffraction confinement assisted by metallic nanostructures. However, a key limitation which has stunted a full development of high-performance nanophotonic devices is the typical large losses associated with the constituent metals. Although silver has long been known as the highest quality plasmonic material for visible and near infrared applications, its usage has been limited due to practical issues of continuous thin film formation, stability, adhesion, and surface roughness...
March 20, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28317960/azomethine-isocyanide-3-2-cycloaddition-to-imidazoles-promoted-by-silver-and-dbu
#12
Xiaoshan Huang, Xuefeng Cong, Pengbing Mi, Xihe Bi
A new silver-promoted [3+2] cycloaddition of azomethine ylides with isocyanides has been described. The methodology provides an efficient and modular approach to 1,2,4-trisubstituted imidazoles of vital bioactive molecules and atypical antipsychotics analogues.
March 20, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28317940/size-tunable-synthesis-of-silver-nanobelts-using-a-polyaniline-derived-polymer-as-a-template
#13
Sudakar Padmanaban, Minog Kim, Sungho Yoon
Silver nanobelts (AgNBs) have attracted a great interest due to their excellent electrical conductivity and mechanical strength, leading a facile synthesis of these AgNBs in great demand. In here, we are reporting a simple, aqueous phase, size tunable synthesis of smooth surfaced 1D-silver nanobelts using a Polyaniline (PANi) derived polymer at room temperature. The specifically designed PANi polymer, comprising a pendant carboxyl group in the chain, acted as both a reducing agent and template. The resulting Ag nanobelts have more than 10 μm of length, mean width values ranging from 41...
March 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28317763/effect-of-organic-additives-on-silver-release-from-nanosilver-polyethylene-composite-films-to-acidic-food-simulant
#14
Qi-Zhi Su, Qin-Bao Lin, Chao-Fang Chen, Li-Bing Wu, Zhi-Wei Wang
The effects of organic additives (Irgafos 168, Irganox 1076, Tinuvin 622, Chimassorb 944, UV-P, and UV-531) on silver release from nanosilver-polyethylene composite films into an acidic food simulant (3% acetic acid) were investigated using inductively coupled plasma mass spectrometry. The limits of detection and quantification, coefficient of determination, and recoveries of the method used were 3.7ngL(-1), 12.4ngL(-1), 0.999, and 89-113%, respectively. The results indicated that additives can affect silver release via two simultaneous processes: (i) reactions between organic additives and silver that promote silver release from the composite film to the acidic food simulant; and (ii) the promotion or inhibition of silver release by affecting silver oxidation...
August 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28317411/evaluation-of-serum-erythropoietin-values-as-defined-by-2016-world-health-organization-criteria-for-the-diagnosis-of-polycythemia-vera
#15
Richard T Silver, Spencer Krichevsky, Stefani Gjoni, Nicholas C P Cross
No abstract text is available yet for this article.
March 20, 2017: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/28317205/manganese-i-catalyzed-dispersion-enabled-c-h-c-c-activation
#16
Tjark H Meyer, Weiping Liu, Milica Feldt, Axel Wuttke, Ricardo A Mata, Lutz Ackermann
C-H/C-C functionalizations were achieved with the aid of a versatile manganese(I) catalyst. Thus, an organometallic manganese-catalyzed C-H activation set the stage for silver-free C-H/C-C transformations with ample substrate scope and excellent levels of chemo-, site- and diastereo-selectivities. The robust nature of the manganese(I) catalysis regime was reflected by the first C-H/C-C functionalization on amino acids under racemization-free reaction conditions. Detailed experimental and computational mechanistic studies provided strong evidence for a facile C-H activation and a rate-determining C-C cleavage, with considerable contribution from London dispersion interactions...
March 20, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28316389/molecular-characterization-of-myxoboluscatmrigalae-myxosporea-myxobolidae-infecting-the-gill-lamellae-of-carp-cirrhinusmrigala-hamilton
#17
Sayani Banerjee, Avijit Patra, Anjan Mondal, Harresh Adikesavalu, Kurva Raghu Ramudu, Gadadhar Dash, Siddhartha Narayan Joardar, Thangapalam Jawahar Abraham
The present study attempted sequencing the 18S rRNA gene of Myxoboluscatmrigalae infecting the gill lamellae of carp, Cirrhinusmrigala and compared its genetic homology and phylogenetic characteristics with 18S rRNA genes of other Myxobolus spp. The infected fish had up to 3 small, creamy white plasmodia per gill filament with 30-50 spores each. The spore size was 17.90 ± 0.70 × 7.40 ± 0.40 μm. The sporoplasm contained two large nuclei of size 0.57 ± 0.09 μm and no iodinophilous vacuole. The DNA sequence of M...
March 2017: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/28316361/iminophosphanes-synthesis-rhodium-complexes-and-ruthenium-ii-catalyzed-hydration-of-nitriles
#18
Mark K Rong, Koen van Duin, Tom van Dijk, Jeroen J M de Pater, Berth-Jan Deelman, Martin Nieger, A W Ehlers, J Chris Slootweg, Koop Lammertsma
Highly stable iminophosphanes, obtained from alkylating nitriles and reaction of the resulting nitrilium ions with secondary phosphanes, were explored as tunable P-monodentate and 1,3-P,N bidentate ligands in rhodium complexes. X-ray crystal structures are reported for both κ(1) and κ(2) complexes with the counterion in one of them being an unusual anionic coordination polymer of silver triflate. The iminophosphane-based ruthenium(II)-catalyzed hydration of benzonitrile in 1,2-dimethoxyethane (180 °C, 3 h) and water (100 °C, 24 h) and under solvent free conditions (180 °C, 3 h) results in all cases in the selective formation of benzamide with yields of up to 96%, thereby outperforming by far the reactions in which the common 2-pyridyldiphenylphosphane is used as the 1,3-P,N ligand...
March 13, 2017: Organometallics
https://www.readbyqxmd.com/read/28315584/high-density-polystyrene-grafted-silver-nanoparticles-and-their-use-in-the-preparation-of-nanocomposites-with-antibacterial-properties
#19
Piotr Krystosiak, Waldemar Tomaszewski, Elżbieta Megiel
The achievement of uniform nanoparticles distribution in polymer matrix is still a major challenge in the design and fabrication of polymer nanocomposites with desired properties. In this paper we propose a novel approach for the preparation of homogeneous polystyrene/silver nanocomposites utilizing Nitroxide Mediated Radical Polymerization (NMRP). In the first step of the developed procedure, the polystyrene grafted silver nanoparticles (Ag@PS) with well-defined core-shell structure and exceptionally high grafting density (from 2 chains/nm(2) to 5...
March 9, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28315442/adsorption-and-desorption-behaviors-of-cesium-on-rayon-fibers-coated-with-chitosan-immobilized-with-prussian-blue
#20
Duangkamol Dechojarassri, Shohei Asaina, Sahori Omote, Kensuke Nishida, Tetsuya Furuike, Hiroshi Tamura
Rayon fiber coated with chitosan (CTS) that contained immobilized Prussian blue (KFe) (KFe/CTS/rayon) were investigated for the removal of cesium ion (Cs(+)) from contaminated water. The morphology and mechanical strength of the fibers were observed using scanning electron microscopy (SEM) and a universal testing machine, respectively. The Cs(+) concentration was determined by inductively coupled plasma-atomic emission spectroscopy. SEM images revealed that the surface of the KFe/CTS/rayon fiber showed the most roughness...
March 14, 2017: International Journal of Biological Macromolecules
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