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https://www.readbyqxmd.com/read/29156612/leishmanicidal-activity-of-biogenic-fe%C3%A2-o%C3%A2-nanoparticles
#1
Mehrdad Khatami, Hajar Alijani, Iraj Sharifi, Fatemeh Sharifi, Shahram Pourseyedi, Sam Kharazi, Marcos Augusto Lima Nobre, Manouchehr Khatami
Abstract: Due to the multiplicity of useful applications of metal oxide nanoparticles (ONPs) in medicine are growing exponentially, in this study, Fe₃O₄ (iron oxide) nanoparticles (IONPs) were biosynthesized using Rosemary to evaluate the leishmanicidal efficiency of green synthesized IONPs. This is the first report of the leishmanicidal efficiency of green synthesized IONPs against Leishmania major. The resulting biosynthesized IONPs were characterized by ultraviolet-visible spectroscopy (UV-Vis), X-ray diffraction (XRD), transmission electron microscopy (TEM), and Fourier transform infrared spectroscopy (FTIR)...
November 20, 2017: Scientia Pharmaceutica
https://www.readbyqxmd.com/read/29156405/effective-immobilization-of-au-nanoparticles-on-tio2-loaded-graphene-for-a-novel-sandwich-type-immunosensor
#2
Ying Chen, Yu Li, Dongmei Deng, Haibo He, Xiaoxia Yan, Zhenxin Wang, Chunhai Fan, Liqiang Luo
A novel and sensitive sandwich immunosensor for amperometric determination of carcinoembryonic antigen (CEA) was designed using Au nanoparticles-titanium dioxide-graphene (AuNPs-TiO2-graphene) nanocomposites. Dopamine-functionalized graphene was firstly prepared by π-stacking interaction, and TiO2 was then attached to the surface of dopamine-graphene by the specificity and high affinity of enediol ligands to Ti (IV). Afterwards, AuNPs-TiO2-graphene nanocomposites were synthesized with photo-reduction approach under ultraviolet irradiation...
November 17, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29155715/indoor-experimental-assessment-of-the-efficiency-and-irradiance-spot-of-the-achromatic-doublet-on-glass-adg-fresnel-lens-for-concentrating-photovoltaics
#3
Guido Vallerotto, Marta Victoria, Stephen Askins, Ignacio Antón, Gabriel Sala, Rebeca Herrero, César Domínguez
We present a method to characterize achromatic Fresnel lenses for photovoltaic applications. The achromatic doublet on glass (ADG) Fresnel lens is composed of two materials, a plastic and an elastomer, whose dispersion characteristics (refractive index variation with wavelength) are different. We first designed the lens geometry and then used ray-tracing simulation, based on the Monte Carlo method, to analyze its performance from the point of view of both optical efficiency and the maximum attainable concentration...
October 27, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29155583/formation-of-long-lived-color-centers-for-broadband-visible-light-emission-in-low-dimensional-layered-perovskites
#4
Edward P Booker, Tudor H Thomas, Claudio Quarti, Michael R Stanton, Cameron D Dashwood, Alexander J Gillett, Johannes M Richter, Andrew J Pearson, Nathaniel J L K Davis, Henning Sirringhaus, Michael B Price, Neil C Greenham, David Beljonne, Siân E Dutton, Felix Deschler
We investigate the origin of the broadband visible emission in layered hybrid lead-halide perovskites and its connection with structural and photophysical properties. We study <001> oriented thin films of hexylammonium (HA) lead iodide, (C6H16N)2PbI4, and dodecylammonium (DA) lead iodide, (C12H28N)2PbI4 by combining first-principles simulations with time-resolved photoluminescence, steady-state absorption and X-ray diffraction measurements on cooling from 300 K to 4 K. Ultrafast transient absorption and photoluminescence measurements are used to track the formation and recombination of emissive states...
November 20, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29155569/redox-behavior-of-a-dinuclear-ruthenium-ii-complex-bearing-an-uncommon-bridging-ligand-insights-from-high-pressure-electrochemistry
#5
Maximilian Dürr, Johannes Klein, Axel Kahnt, Sabine Becker, Ralph Puchta, Biprajit Sarkar, Ivana Ivanović-Burmazović
A dinuclear ruthenium complex bridged by 2,3,5,6-pyrazinetetracarboxylic acid (μ-LH2(2-)) was synthesized and characterized by X-ray crystallography, cyclic voltammetry under ambient and elevated pressures, electron paramagnetic resonance (EPR) and UV/vis-NIR (NIR = near-infrared) spectroelectrochemistry, pulse radiolysis, and computational methods. We probed for the first time in the field of mixed-valency the use of high-pressure electrochemical methods. The investigations were directed toward the influence of the protonation state of the bridging ligand on the electronic communication between the ruthenium ions, since such behavior is interesting in terms of modulating redox chemistry by pH...
November 20, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/29155467/synthesis-characterisation-and-reactions-of-truly-cationic-ni-i-phosphine-complexes
#6
Ingo Krossing, Miriam Mareen Schwab, Daniel Himmel, Sylwia Kacprzak, Valentin Radtke, Daniel Kratzert, Philippe Weis, Melanie Wernet, Andreas Peter, Zeinab Yassine, Dominik Schmitz, Ernst-Wilhelm Scheidt, Wolfgang Scherer, Stefan Weber, Wolfram Feuerstein, Frank Breher, Alexander Higelin
The recently published purely metalorganic NiI salt [Ni(cod)2][Al(ORF)4] (1, cod = 1,5-cyclooctadiene, RF = C(CF3)3) provides a starting point for a new synthesis strategy leading to NiI phosphine complexes, replacing cod ligands by phosphines. Clearly visible colour changes indicate reactions within minutes, while quantum chemical calculations (PBE0-D3(BJ)/def2-TZVPP) approve exergonic reaction enthalpies in all performed ligand exchange reactions. Hence, [Ni(dppp)2][Al(ORF)4] (2, dppp = 1,3-Bis(diphenylphosphino)propane), [Ni(dppe)2][Al(ORF)4] (3, dppe = 1,3-Bis(diphenyl-phosphino)ethane), three-coordinate [Ni(PPh3)3][Al(ORF)4] (4) and a remarkable two-coordinate NiI phosphine complex [Ni(PtBu3)2][Al(ORF)4] (5) were characterised via single crystal X-ray structure analysis...
November 20, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29155397/facile-phyto-mediated-synthesis-of-silver-nanoparticles-using-chinese-winter-jujube-ziziphus-jujuba-mill-cv-dongzao-extract-and-their-antibacterial-catalytic-properties
#7
Chun-Gang Yuan, Can Huo, Bing Gui, Jing-Fu Liu, Yong-Sheng Chen
The aqueous extract of Chinese winter jujube (Ziziphus jujuba Mill. cv. Dongzao) was used as reducing and capping agents for the synthesis of silver nanoparticles (AgNPs) for the first time. The resulting AgNPs were characterised by UV/Visible (UV-Vis) spectroscopy, atomic force microscope, transmission electron microscopy, selected area electron diffraction, X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray and Fourier transform infrared spectroscopy (FTIR). The colloidal solution of AgNPs gave a maximum UV-Vis absorbance at 446 nm...
December 2017: IET Nanobiotechnology
https://www.readbyqxmd.com/read/29155029/molecular-characterization-and-expression-analysis-of-complement-component-3-in-dojo-loach-misgurnus-anguillicaudatus
#8
Yongsheng Xu, Yongyao Yu, Xiaoting Zhang, Zhenyu Huang, Huili Li, Shuai Dong, Yangzhou Liu, Fen Dong, Zhen Xu
The complement component 3 (C3) is a central component of complement system. All three pathways converge at formation of C3 convertases and share the terminal pathways of membrane attack complex (MAC) formation. In this study, three isoforms of C3 were discovered in Misgurnus anguillicaudatus, named "C3-1", "C3-2" and "C3-3", respectively. The full-length of C3-1 cDNA sequence was firstly identified and analyzed from dojo loach (Misgurnus anguillicaudatus). The Ma-C3-1 cDNA sequence comprised of 4509 bp encoding 1454 amino acids with a putative signal peptide of 20 amino acid residues...
November 15, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/29155019/the-risk-of-hepatocellular-carcinoma-in-cirrhotic-patients-with-hepatitis-c-and-sustained-viral-response-role-of-the-treatment-regimen
#9
Hamish Innes, Stephen T Barclay, Peter C Hayes, Andrew Fraser, John F Dillon, Adrian Stanley, Andy Bathgate, Scott A McDonald, David Goldberg, Heather Valerio, Ray Fox, Nick Kennedy, Pete Bramley, Sharon J Hutchinson
BACKGROUND: Previous studies have reported a high frequency of hepatocellular carcinoma (HCC) occurrence in patients with advanced liver disease, after receipt of interferon(IFN)-free therapy for hepatitis C virus (HCV) infection. Our objective was to verify and account for this phenomenon using data from the Scottish HCV Clinical Database. METHODS: We identified HCC-naïve individuals with liver cirrhosis receiving a course of antiviral therapy in Scotland from 1997-2016 resulting in a SVR...
November 15, 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/29154256/patient-doses-from-medical-examinations-in-russia-2009-2015
#10
Mikhail I Balonov, Vladislav Golikov, Irina Zvonova, Larisa Chipiga, Sergey Kalnitsky, Svetlana Sarycheva, Alexander Vodovatov
The aim of current study was to evaluate adult patient doses in Russia in context of patient protection. Effective doses from X-ray and nuclear medicine examinations were assessed using two approaches. The first was based on data collection performed by authors in hospitals in St-Petersburg and other 17 Russian regions. The second approach was to assess mean doses through the collective dose estimated annually within the federal data bank ESKID. In 2015, 203 million examinations were conducted in Russia, i...
November 20, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/29151368/the-application-of-scanning-electron-microscopy-with-energy-dispersive-x-ray-spectroscopy-sem-edx-in-ancient-dental-calculus-for-the-reconstruction-of-human-habits
#11
Dana Fialová, Radim Skoupý, Eva Drozdová, Aleš Paták, Jakub Piňos, Lukáš Šín, Radoslav Beňuš, Bohuslav Klíma
The great potential of scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDX) is in detection of unusual chemical elements included in ancient human dental calculus to verify hypotheses about life and burial habits of historic populations and individuals. Elemental spectra were performed from archeological samples of three chosen individuals from different time periods. The unusual presence of magnesium, aluminum, and silicon in the first sample could confirm the hypothesis of high degree of dental abrasion caused by particles from grinding stones in flour...
November 20, 2017: Microscopy and Microanalysis
https://www.readbyqxmd.com/read/29150015/the-flotation-and-adsorption-of-mixed-collectors-on-oxide-and-silicate-minerals
#12
REVIEW
Longhua Xu, Jia Tian, Houqin Wu, Zhongyuan Lu, Wei Sun, Yuehua Hu
The analysis of flotation and adsorption of mixed collectors on oxide and silicate minerals is of great importance for both industrial applications and theoretical research. Over the past years, significant progress has been achieved in understanding the adsorption of single collectors in micelles as well as at interfaces. By contrast, the self-assembly of mixed collectors at liquid/air and solid/liquid interfaces remains a developing area as a result of the complexity of the mixed systems involved and the limited availability of suitable analytical techniques...
November 11, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/29148848/corrigendum
#13
(no author information available yet)
Klemola T, Leppilahti J, Laine V, et al. Effect of first tarsometatarsal joint derotational arthrodesis on first ray dynamic stability compared to distal chevron osteotomy. Foot Ankle Int. 2017;38(8):847-854. (Original DOI: 10.1177/1071100717706153).
November 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/29148789/amphiphilic-n-heterocyclic-carbene-stabilized-gold-nanoparticles-and-their-self-assembly-in-polar-solvents
#14
Mina R Narouz, Chien-Hung Li, Ali Nazemi, Cathleen M Crudden
Soft matter-directed self-assembly of amphiphilic inorganic nanoparticles (NPs) has recently emerged as a promising approach to access NP ensembles with superior collective properties. While thiol-terminated molecules are primarily employed to tether the amphiphilic ligand to the metal, serious concerns remain regarding the stabilities of the resulting NPs and their corresponding superstructures. As an alternative to such ligands, we report the first example of amphiphilic N-heterocyclic carbene (NHC)-functionalized gold nanoparticles (AuNPs)...
November 17, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29148718/atomic-layer-deposition-of-single-crystalline-beo-epitaxially-grown-on-gan-substrates
#15
Seung Min Lee, Jung Hwan Yum, Seonno Yoon, Eric S Larsen, Woo Chul Lee, Seong Keun Kim, Shahab Shervin, Weijie Wang, Jae-Hyun Ryou, Christopher W Bielawski, Jungwoo Oh
We have developed a beryllium oxide (BeO) thin film process by atomic layer deposition (ALD) and grown a single-crystal BeO on a gallium nitride (GaN) substrate for the first time. BeO has a higher thermal conductivity than all other metals except Cu, Ag, and Au, and it has a higher bandgap energy and dielectric constant than SiO2 and Al2O3. As an electrical insulator, diamond is the only material on Earth whose thermal conductivity exceeds that of BeO. Despite these advantages, there is no chemical vapor deposition technique for BeO thin film deposition, and thus, it is not used in nanoscale semiconductor device processing...
November 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29148042/comparative-anatomy-of-zebrafish-paired-and-median-fin-muscles-basis-for-functional-developmental-and-macroevolutionary-studies
#16
Natalia Siomava, Rui Diogo
In the last decades, Danio rerio became one of the most used model organisms in various evo-devo studies devoted to the fin skeletal anatomy and fin-limb transition. Surprisingly, there is not even a single paper about the detailed anatomy of the adult muscles of the five fin types of this species. To facilitate more integrative developmental, functional, genetic, and evolutionary studies of the appendicular musculoskeletal system of the zebrafish and to provide a basis for further comparisons with other fishes and tetrapods, we describe here the identity, overall configuration, and attachments of appendicular muscles in a way that can be easily understood and implemented by non-anatomist researchers...
November 17, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/29147984/removal-of-fluoroquinolone-from-aqueous-solution-using-graphene-oxide-experimental-and-computational-elucidation
#17
Sarita Yadav, Neetu Goel, Vinod Kumar, Kulbhushan Tikoo, Sonal Singhal
The environmental risks of antibiotics have attracted increasing research attention due to their prevalence and persistence in the aquatic environment. In this study, oxygen functionalized graphene, namely, graphene oxide (GO), was synthesized by modified Hummer's and Offeman's method and used as potential effective absorbent for the removal of fluoroquinolones (FQs), i.e., ciprofloxacin (CIP), norfloxacin (NOR), and ofloxacin (OFL), from aqueous solution. The as-synthesized GO was characterized by Fourier transform infrared (FTIR) spectroscopy, powder X-ray diffraction (XRD), thermogravimetric analysis (TGA), and high-resolution transmission electron microscopy (HRTEM)...
November 16, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29145781/analytical-high-resolution-electron-microscopy-reveals-organ-specific-nanoceria-bioprocessing
#18
Uschi M Graham, Robert A Yokel, Alan K Dozier, Lawrence Drummy, Krishnamurthy Mahalingam, Michael T Tseng, Eileen Birch, Joseph Fernback
This is the first utilization of advanced analytical electron microscopy methods, including high-resolution transmission electron microscopy, high-angle annular dark field scanning transmission electron microscopy, electron energy loss spectroscopy, and energy-dispersive X-ray spectroscopy mapping to characterize the organ-specific bioprocessing of a relatively inert nanomaterial (nanoceria). Liver and spleen samples from rats given a single intravenous infusion of nanoceria were obtained after prolonged (90 days) in vivo exposure...
January 1, 2017: Toxicologic Pathology
https://www.readbyqxmd.com/read/29144722/transport-across-heterointerfaces-of-amorphous-niobium-oxide-and-crystallographically-oriented-epitaxial-germanium
#19
Mantu K Hudait, Michael Brian Clavel, Jheng-Sin Liu, Aheli Ghosh, Nikhil Jain, Robert J Bodnar
Due to the high carrier mobility of germanium (Ge) and high dielectric permittivity of amorphous niobium pentoxide (a-Nb2O5), Ge/a-Nb2O5 heterostructures offer several advantages for the rapidly developing field of oxide-semiconductor-based multifunctional devices. To this end, we investigation the growth, structural, band alignment, and metal-insulator-semiconductor (MIS) electrical properties of physical vapor deposited Nb2O5 on crystallographically oriented (100)Ge, (110), and (111)Ge epilayers. The as-deposited Nb2O5 dielectrics were found to be in the amorphous state, demonstrating an abrupt oxide/semiconductor heterointerface with respect to Ge, when examined via low- and high-magnification cross-sectional transmission electron microscopy...
November 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29143568/the-inter-rater-reliability-and-prognostic-value-of-coma-scales-in-nepali-children-with-acute-encephalitis-syndrome
#20
Stephen Ray, Ajit Rayamajhi, Laura J Bonnett, Tom Solomon, Rachel Kneen, Michael J Griffiths
Background Acute encephalitis syndrome (AES) is a common cause of coma in Nepali children. The Glasgow coma scale (GCS) is used to assess the level of coma in these patients and predict outcome. Alternative coma scales may have better inter-rater reliability and prognostic value in encephalitis in Nepali children, but this has not been studied. The Adelaide coma scale (ACS), Blantyre coma scale (BCS) and the Alert, Verbal, Pain, Unresponsive scale (AVPU) are alternatives to the GCS which can be used. Methods Children aged 1-14 years who presented to Kanti Children's Hospital, Kathmandu with AES between September 2010 and November 2011 were recruited...
November 16, 2017: Paediatrics and International Child Health
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