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https://www.readbyqxmd.com/read/28425518/dynamic-manipulation-of-the-local-ph-within-a-nanopore-triggered-by-surface-induced-phase-transition
#1
Akira Koyama, Kazuhiro Fukami, Yujin Imaoka, Atsushi Kitada, Tetsuo Sakka, Takeshi Abe, Kuniaki Murase, Masahiro Kinoshita
Manipulating the local pH within nanoconfinement is essential in nanofluidics technology and its applications. Since the conventional strategy utilizes the overlapping of an electric double layer formed for charge compensation by protons near a negatively charged pore-wall surface, pH variation within a pore is limited to the acidic side. To achieve the variation at the alkaline side, we developed a system comprising a hydrophobic pore-wall surface and aqueous solution containing hydrophobic cations. Beyond a threshold cation concentration, a nanopore is filled with the second phase where the cations are remarkably enriched due to surface-induced phase transition (SIFT) originating from the hydrophobic effect...
April 20, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28424514/observed-quantization-of-anyonic-heat-flow
#2
Mitali Banerjee, Moty Heiblum, Amir Rosenblatt, Yuval Oreg, Dima E Feldman, Ady Stern, Vladimir Umansky
The quantum of thermal conductance of ballistic (collisionless) one-dimensional channels is a unique fundamental constant. Although the quantization of the electrical conductance of one-dimensional ballistic conductors has long been experimentally established, demonstrating the quantization of thermal conductance has been challenging as it necessitated an accurate measurement of very small temperature increase. It has been accomplished for weakly interacting systems of phonons, photons and electronic Fermi liquids; however, it should theoretically also hold in strongly interacting systems, such as those in which the fractional quantum Hall effect is observed...
April 17, 2017: Nature
https://www.readbyqxmd.com/read/28414963/three-dimensional-excitation-and-emission-matrix-fluorescence-3deem-for-quick-and-pseudo-quantitative-determination-of-protein-and-humic-like-substances-in-full-scale-membrane-bioreactor-mbr
#3
Céline Jacquin, Geoffroy Lesage, Jacqueline Traber, Wouter Pronk, Marc Heran
The goal of this study is to help filling the research gaps linked to the on-line application of fluorescence spectroscopy in wastewater treatment and data processing tools suitable for rapid correction and extraction of data contained in three-dimensional fluorescence excitation-emission matrix (3DEEM) for real-time studies. 3DEEM was evaluated for direct quantification of Effluent Organic Matter (EfOM) fractions in full-scale MBR bulk supernatant and permeate samples. Principal Component Analysis (PCA) was used to investigate possible correlations between conventional Lowry and Dubois methods, Liquid Chromatography coupled to Organic Carbon and Organic Nitrogen Detection (LC-OCD-OND) and 3DEEM...
April 5, 2017: Water Research
https://www.readbyqxmd.com/read/28413061/mechanical-behavior-of-bulk-direct-composite-versus-block-composite-and-lithium-disilicate-indirect-class-ii-restorations-by-cad-fem-modeling
#4
Pietro Ausiello, Stefano Ciaramella, Andrea Fabianelli, Antonio Gloria, Massimo Martorelli, Antonio Lanzotti, David C Watts
OBJECTIVES: To study the influence of resin based and lithium disilicate materials on the stress and strain distributions in adhesive class II mesio-occlusal-distal (MOD) restorations using numerical finite element analysis (FEA). To investigate the materials combinations in the restored teeth during mastication and their ability to relieve stresses. METHODS: One 3D model of a sound lower molar and three 3D class II MOD cavity models with 95° cavity-margin-angle shapes were modelled...
April 13, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28412791/-surface-roughness-and-gloss-of-novel-flowable-composites-after-polishing-and-simulated-brushing-wear
#5
R L Wang, C Y Yuan, Y X Pan, F C Tian, Z H Wang, X Y Wang
Objective: To investigate surface properties of novel flowable composites after polishing and simulated brushing wear, compared to their pasty counterpart. Methods: Composites employed in this study were: three flowable composites (A1: Clearfil Majesty ES Flow; B1: Beautifil Flow Plus F00; C1: Filtek Bulk Fill) and three paste composites (A2: Clearfil Majesty; B2: Beautifil; C2: Filtek Z350. Eleven disk-shaped specimens were made for each material. The specimens were cured, then subjected to sandpaper finishing for 20 s, one-step polishing for 30 s, finally subjected to simulated brushing for 10 000 cycles...
April 9, 2017: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
https://www.readbyqxmd.com/read/28408763/silicon-solar-cells-on-glass-with-power-conversion-efficiency-above-13-at-thickness-below-15-micrometer
#6
Paul Sonntag, Natalie Preissler, Matevž Bokalič, Martina Trahms, Jan Haschke, Rutger Schlatmann, Marko Topič, Bernd Rech, Daniel Amkreutz
Liquid phase crystallized silicon on glass with a thickness of (10-40) μm has the potential to reduce material costs and the environmental impact of crystalline silicon solar cells. Recently, wafer quality open circuit voltages of over 650 mV and remarkable photocurrent densities of over 30 mA/cm(2) have been demonstrated on this material, however, a low fill factor was limiting the performance. In this work we present our latest cell progress on 13 μm thin poly-crystalline silicon fabricated by the liquid phase crystallization directly on glass...
April 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28402737/comparison-of-polymerization-shrinkage-physical-properties-and-marginal-adaptation-of-flowable-and-restorative-bulk-fill-resin-based-composites
#7
J H Jung, S H Park
PURPOSE: The purpose of this study was to compare the marginal adaptation of two flowable bulk fill resin-based composites (FB-RBCs), two restorative bulk fill resin-based composites (RB-RBCs), and one regular incremental-fill RBC in MOD cavities in vitro. Additionally, the influence of linear polymerization shrinkage, shrinkage force, flexural modulus, and bottom/top surface hardness ratio on the marginal adaptation was evaluated. METHODS: A Class II MOD cavity was prepared in 40 extracted sound lower molars...
April 12, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28402731/characterization-of-inorganic-filler-content-mechanical-properties-and-light-transmission-of-bulk-fill-resin-composites
#8
B M Fronza, Apa Ayres, R R Pacheco, F A Rueggeberg, Cts Dias, M Giannini
OBJECTIVES: The aims of this study were to characterize inorganic content (IC), light transmission (LT), biaxial flexural strength (BFS), and flexural modulus (FM) of one conventional (layered) and four bulk-fill composites at different depths. METHODS: Bulk-fill composites tested were Surefil SDR flow (SDR), Filtek Bulk Fill (FBF), Tetric EvoCeram Bulk Fill (TEC), and EverX Posterior (EXP). Herculite Classic (HER) was used as a control. Energy dispersive x-ray analysis and scanning electron microscopy were used to characterize filler particle composition and morphology...
April 12, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28402730/light-emitting-diode-beam-profile-and-spectral-output-influence-on-the-degree-of-conversion-of-bulk-fill-composites
#9
M G Rocha, Dcrs de Oliveira, I C Correa, L Correr-Sobrinho, Mac Sinhoreti, J L Ferracane, A B Correr
OBJECTIVES: To evaluate the beam profile and the spectral output of monowave and polywave light-emitting diodes (LEDs) and their influence on the degree of conversion (DC) of bulk fill composites. METHODS: A monowave LED (Smartlite Focus, Dentsply) and a polywave LED (Valo Cordless, Ultradent) were characterized using a resin calibrator and a laser beam profile analyzer. Two bulk fill composites, Sonic Fill 2 (SF) containing camphorquinone (CQ) and Tetric EvoCeram Bulk Fill (TEB) containing CQ associated with alternative photoinitiators, were placed in custom-designed molds (n=3) and photoactivated by the monowave or polywave LED with 20 J/cm(2)...
April 12, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28401878/negative-and-positive-cross-correlations-of-current-noises-in-quantum-hall-edge-channels-at-bulk-filling-factor-i-%C3%AE-i-1
#10
Tomoaki Ota, Masayuki Hashisaka, Koji Muraki, T Fujisawa
Cross-correlation noise in electrical currents generated from a series connection of two quantum point contacts (QPCs), the injector and the detector, is described for investigating energy relaxation in quantum Hall edge channels at bulk filling factor <i>ν</i> = 1. We address the importance of tuning the energy bias across the detector for this purpose. For a long channel with a macroscopic floating ohmic contact that thermalizes the electrons, the cross-correlation turns from negative values to the maximally positive value (identical noise in the two currents) by tuning the effective energy bias to zero...
April 12, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28395354/urinary-bisphenol-a-bpa-concentrations-among-workers-in-industries-that-manufacture-and-use-bpa-in-the-usa
#11
Cynthia J Hines, Matthew V Jackson, James A Deddens, John C Clark, Xiaoyun Ye, Annette L Christianson, Juliana W Meadows, Antonia M Calafat
Background: Bisphenol A (BPA) toxicity and exposure risk to humans has been the subject of considerable scientific debate; however, published occupational exposure data for BPA are limited. Methods: In 2013-2014, 77 workers at six US companies making BPA, BPA-based resins, or BPA-filled wax provided seven urine samples over two consecutive work days (151 worker-days, 525 samples). Participant information included industry, job, tasks, personal protective equipment used, hygiene behaviors, and canned food/beverage consumption...
March 1, 2017: Annals of Work Exposures and Health
https://www.readbyqxmd.com/read/28392818/comparison-of-push-out-bond-strength-of-two-bulk-fill-and-one-conventional-composite-to-intracanal-dentin-in-severely-damaged-primary-anterior-teeth
#12
Shahram Mosharrafian, Zeynab Sharifi
OBJECTIVES: This study sought to compare the push-out bond strength of two bulk-fill and one conventional composite to intracanal dentin in primary anterior teeth. MATERIALS AND METHODS: This in vitro, experimental study was conducted on 39 primary anterior teeth, which were randomly divided into three groups. After cleaning and shaping, the root canals were filled with Metapex in such a way that after the application of 1mm light-cure liner on top of it, the coronal 3mm of the canal remained empty for composite post space...
June 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28386886/quantitative-study-on-nitrogen-deposition-and-canopy-retention-in-mediterranean-evergreen-forests
#13
Anna Avila, Laura Aguillaume, Sheila Izquieta-Rojano, Héctor García-Gómez, David Elustondo, Jesús Miguel Santamaría, Rocío Alonso
To assess the impact of nitrogen (N) pollutants on forest ecosystems, the role of the interactions in the canopy needs to be understood. A great number of studies have addressed this issue in heavily N-polluted regions in north and central Europe. Much less information is available for the Iberian Peninsula, and yet this region is home to mountain forests and alpine grasslands that may be at risk due to excessive N deposition. To establish the basis for ecology-based policies, there is a need to better understand the forest response to this atmospheric impact...
April 6, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28384233/subsoiling-practices-change-root-distribution-and-increase-post-anthesis-dry-matter-accumulation-and-yield-in-summer-maize
#14
Xuefang Sun, Zaisong Ding, Xinbing Wang, Haipeng Hou, Baoyuan Zhou, Yang Yue, Wei Ma, Junzhu Ge, Zhimin Wang, Ming Zhao
Subsoiling is an important management practice for improving maize yield, especially for maize planted at high plant density. However, the affected physiological processes have yet to be specifically identified. In this study, field experiments with two soil tillage (CK: no-tillage, SS: subsoiling) and three planting densities (low: 45000 plants ha-1, medium: 67500plants ha-1, and high: 90000 plants ha-1) were conducted from 2010 to 2012 at Xinxiang, Henan province. Yield, canopy function, and root system were investigated to determine the associated physiological processes for improving maize production affected by soil tillage and plant density...
2017: PloS One
https://www.readbyqxmd.com/read/28368115/generation-and-stability-of-bulk-nanobubbles
#15
Seung Hoon Oh, Jong-Min Kim
Recently, extremely small bubbles, referred to as nanobubbles, have drawn increased attention due to their novel properties and great potential for various applications. In this study, a novel method for the generation of bulk nanobubbles (BNBs) was introduced, and stability of fabricated BNBs was investigated. BNBs were created from CO2 gas with a mixing method; the chemical identity and phase state of these bubbles can be determined via infrared spectroscopy. The presence of BNBs was observed with a nanoparticle tracking analysis (NTA)...
April 3, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28362112/the-role-of-non-fat-ingredients-on-confectionery-fat-crystallization
#16
Ryan West, Dérick Rousseau
Confections such as chocolate and biscuit fillings are composed of a continuous fat phase that contains dispersed non-fat ingredients such as sugar and cocoa powder. Research on fat crystallization and rheology in confections often extrapolates crystallization and textural properties from bulk to mixed systems while overlooking the important role of composition or particle interactions. For example, in chocolate processing the fat phase aids dispersed phase lubrication and fluidity whereas the dispersed particles assist in fat crystallization by providing many nucleation sites...
March 31, 2017: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/28359956/ab-initio-study-of-the-energy-loss-near-sulfur-k-and-l2-3-edges-of-layered-ms2-m-ta-nb-and-v-in-trigonal-prismatic-and-octahedral-structures
#17
Mehrdad Dadsetani, Tahereh Nouri, Hajar Nejatipour
This study set out to calculate the full-potential linearized augmented plane wave (FPLAPW)-based energy loss near sulfur K and L2,3 edge structures of group V layered transition metal disulfides MS2 (M=Ta, Nb, and V) in octahedral (1T) as well as trigonal prismatic (2H) structures. The calculations showed that, consistent with other calculations, all the studied materials were metallic due to the partially filled d bands in their configurations. Furthermore, the calculated ELNES spectra revealed a good agreement with the available experimental XANES analogues...
March 14, 2017: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/28326678/rational-engineering-of-bodipy-bridged-trisindole-derivatives-for-solar-cell-applications
#18
Nicolas Leclerc, Ibrahim Bulut, Quentin Huaulmé, Antoine Mirloup, Patricia Chávez, Sadiara Fall, Anne Hébraud, Stéphane Méry, Benoit Heinrich, Thomas Heiser, Patrick Lévêque
Boron dipyrromethene (Bodipy) are known to be efficient photon harvesting chromophores. However, their study as active materials in bulk heterojunction (BHJ) solar cells is still scarce. In this paper, we developed new synthetic ways to design original Bodipy-based dumbbell-shape molecules, including a first 2,3,5,6-tetravinyl aromatic Bodipy molecule. We demonstrated that high fill factors can be obtained in BHJ solar cells when blended with a fullerene derivative, leading to a new Bodipy-based record power conversion efficiency of 5...
March 21, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28298988/bond-strength-of-dental-nanocomposites-repaired-with-a-bulkfill-composite
#19
Uzay Koç-Vural, Leyla Kerimova, İsmail H Baltacioglu, Arlin Kiremitçi
BACKGROUND: The aim of this study was to analyze the bond strength of aged resin based nanocomposites repaired with the same and bulk fill composites. MATERIAL AND METHODS: Seventy-two disc shaped resin composites consisted of three different nanocomposite resins (Filtek Ultimate/FU, Herculite XRV Ultra/HXRV, and Reflectys/R) were produced. After storing the samples for 8 weeks in distilled water, each material was combined with the same material or the bulk-fill composite resin system (Filtek Ultimate+Filtek Ultimate/Group-1; Filtek Ultimate+Tetric BF/Group-2; Herculite XRV+Herculite XRV/Group-3; Herculite XRV+Tetric BF/ Group-4; Reflectys+Reflectys/Group 5; Reflectys+Tetric BF/Group-6), for repair...
March 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28297870/dynamics-of-field-driven-population-inversion-in-a-confined-colloidal-mixture
#20
S Chung, S Samin, C Holm, J G Malherbe, S Amokrane
We study, using Langevin dynamics simulations, the change in composition of a binary colloidal mixture confined in a finite-length channel, induced by an external field. The field-induced transition from a near-bulk composition to an inverted population is studied as a function of time, for different field strengths and system parameters. For state points corresponding to reversible field cycles, the cyclic filling and emptying of the channel by the minority species are compared. Extrapolation of the physical relaxation times to the colloidal regime is performed through a series of simulations at increasing value of the damping parameter...
February 2017: Physical Review. E
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