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https://www.readbyqxmd.com/read/29152619/dentin-%C3%AE-tbs-and-hardness-of-bulk-fill-and-conventional-composites-placed-in-a-box-shaped-cavity-preparation
#1
Francisca Daniele Jardilino Silame, Gizele de Pádua Geraldeli, Mário Alexandre Coelho Sinhoreti, Fernanda de Carvalho Panzeri Pires-de-Souza, Jean-Francois Roulet, Saulo Geraldeli
PURPOSE: To compare the dentin microtensile bond strength (μTBS) and the Knoop hardness of bulk-fill and conventional restorative composites in box-shaped Class I cavities using different insertion techniques. MATERIALS AND METHODS: Forty box-shaped Class I preparatons 4 mm deep were performed in the pulp chamber of sound human third molars. The restorations were made using either a conventional microhybrid (Z250, 3M ESPE) or bulk-fill (Tetric EvoCeram Bulk-fill, TCBF) composite using two incremental thicknesses: 2 mm or 4 mm (n = 10)...
November 17, 2017: Journal of Adhesive Dentistry
https://www.readbyqxmd.com/read/29150801/soil-physical-properties-response-to-tillage-practices-during-summer-fallow-of-dryland-winter-wheat-field-on-the-loess-plateau
#2
Jian-Fu Xue, Ai-Xia Ren, Hui Li, Zhi-Qiang Gao, Tian-Qing Du
Soil physical properties are a greatly important part of the soil and indicator of soil quality, which can directly affect soil nutrient turnover and crop yields in dryland. This study was carried out with three tillage practices during the summer fallow season since 2011, including no tillage (NT), plow tillage (PT), and subsoiling (ST) in dryland winter wheat fields of the Loess Plateau. Results showed that soil tillage during the summer fallow had a small effect on soil bulk density (ρ b) in the 0-50-cm soil profile before sowing and after harvesting of winter wheat...
November 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29148914/marginal-gap-formation-in-approximal-bulk-fill-resin-composite-restorations-after-artificial-ageing
#3
A Peutzfeldt, S Mühlebach, A Lussi, S Flury
The aim of this in vitro study was to investigate the marginal gap formation of a packable "regular" resin composite (Filtek Supreme XTE [3M ESPE]) and two flowable "bulk fill" resin composites (Filtek Bulk Fill [3M ESPE] and SDR [DENTSPLY DeTrey]) along the approximal margins of Class II restorations. In each of 39 extracted human molars (n=13 per resin composite), mesial and distal Class II cavities were prepared, placing the gingival margins below the cemento-enamel junction. The cavities were restored with the adhesive system OptiBond FL (Kerr) and one of the three resin composites...
November 17, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/29136531/long-term-effects-of-contrasting-tillage-on-soil-organic-carbon-nitrous-oxide-and-ammonia-emissions-in-a-mediterranean-vertisol-under-different-crop-sequences
#4
Giuseppe Badagliacca, Emilio Benítez, Gaetano Amato, Luigi Badalucco, Dario Giambalvo, Vito Armando Laudicina, Paolo Ruisi
This 2-year study aimed to verify whether the continuous application of no tillage (NT) for over 20years, in comparison with conventional tillage (CT), affects nitrous oxide (N2O) and ammonia (NH3) emissions from a Vertisol and, if so, whether such an effect varies with crop sequence (continuous wheat, WW and wheat after faba bean, FW). To shed light on the mechanisms involved in determining N-gas emissions, soil bulk density, water filled pore space (WFPS), some carbon (C) and nitrogen (N) pools, denitrifying enzyme activity (DEA), and nitrous oxide reductase gene abundance (nosZ gene) were also assessed at 0-15 and 15-30cm soil depth...
November 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29131429/highly-efficient-porphyrin-based-opv-perovskite-hybrid-solar-cells-with-extended-photoresponse-and-high-fill-factor
#5
Ke Gao, Zonglong Zhu, Bo Xu, Sae Byeok Jo, Yuanyuan Kan, Xiaobin Peng, Alex K-Y Jen
Employing a layer of bulk-heterojunction (BHJ) organic semiconductors on top of perovskite to further extend its photoresponse is considered as a simple and promising way to enhance the efficiency of perovskite-based solar cells, instead of using tandem devices or near infrared (NIR)-absorbing Sn-containing perovskites. However, the progress made from this approach is quite limited because very few such hybrid solar cells can simultaneously show high short-circuit current (JSC ) and fill factor (FF). To find an appropriate NIR-absorbing BHJ is essential for highly efficient, organic, photovoltaics (OPV)/perovskite hybrid solar cells...
November 13, 2017: Advanced Materials
https://www.readbyqxmd.com/read/29128128/cad-fe-modeling-and-analysis-of-class-ii-restorations-incorporating-resin-composite-glass-ionomer-and-glass-ceramic-materials
#6
Pietro Ausiello, Stefano Ciaramella, Massimo Martorelli, Antonio Lanzotti, Antonio Gloria, David C Watts
OBJECTIVES: To investigate the influence of specific resin-composite, glass ceramic and glass ionomer cement (GIC) material combinations in a "multi-layer" technique to replace enamel and dentin in class II mesio-occlusal-distal (MOD) dental restorations using 3D-Finite Element Analysis (FEA). METHODS: Four 3D-FE models (A-D) of teeth, adhesively restored with different filling materials, were created and analyzed in comparison with a 3D model (E) of a sound lower molar...
November 8, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29127499/dynamic-modeling-of-nitrogen-removal-for-a-three-stage-integrated-fixed-film-activated-sludge-process-treating-municipal-wastewater
#7
Paul Moretti, Jean-Marc Choubert, Jean-Pierre Canler, Pierre Buffière, Olivier Pétrimaux, Paul Lessard
The integrated fixed-film activated sludge (IFAS) process is being increasingly used to enhance nitrogen removal for former activated sludge systems. The aim of this work is to evaluate a numerical model of a new nitrifying/denitrifying IFAS configuration. It consists of two carrier-free reactors (anoxic and aerobic) and one IFAS reactor with a filling ratio of 43% of carriers, followed by a clarifier. Simulations were carried out with GPS-X involving the nitrification reaction combined with a 1D heterogeneous biofilm model, including attachment/detachment processes...
November 10, 2017: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/29125470/magnetic-behavior-of-metastable-fe-films-grown-on-ir-111
#8
Alberto Calloni, Matteo Cozzi, Madan Sangarashettyhalli Jagadeesh, Gianlorenzo Bussetti, Franco Ciccacci, Lamberto Duo
We investigated the growth of ultra-thin Fe films on Ir(111) by means of <i>in-situ</i> low energy electron diffraction and spin-resolved photoemission techniques. We observe a (1x1) diffraction pattern, characteristic of the <i>fcc</i> substrate, below 4 monolayers (ML). Then, a complex superstructure starts to develop, compatible with the formation of <i>bcc</i>-like Fe domains aligned with the substrate according to the Kourdjumov-Sachs orientation relationships. The analysis of the diffraction patterns reveals a progressive evolution towards a fully relaxed <i>bcc</i> lattice, characteristic of bulk Fe...
November 10, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/29117652/microhardness-of-bulk-fill-composite-materials
#9
Katarina Kelić, Sanja Matić, Danijela Marović, Eva Klarić, Zrinka Tarle
The aim of the study was to determine microhardness of high- and low-viscosity bulk-fill composite resins and compare it with conventional composite materials. Four materials of high-viscosity were tested, including three bulk-fills: QuiXfi l (QF), x-tra fi l (XTF) and Tetric EvoCeram Bulk Fill (TEBCF), while nanohybrid composite GrandioSO (GSO) served as control. The other four were low-viscosity composites, three bulk-fill materials: Smart Dentin Replacement (SDR), Venus Bulk Fill (VBF) and x-tra base (XB), and conventional control material X-Flow (XF)...
December 2016: Acta Clinica Croatica
https://www.readbyqxmd.com/read/29112213/controllable-formation-of-multi-layered-sno2-fe2o3-sandwich-cubes-as-a-high-performance-anode-for-li-ion-batteries
#10
Yi Zeng, Jingze Luo, Yanzhe Wang, Liang Qiao, Bo Zou, Weitao Zheng
The design and controllable synthesis of hollow multi-layered "sandwich" nanostructures offer opportunities for metal oxides to buffer the volume expansion and aggregation due to coalescence into bulk structures, while realizing improved tap density and superior ion transport. We report the intentional construction of Fe2O3 nanorod-assembled layers to cover and fill the surface and interlayer of double-shelled SnO2 hollow nanocubes (HNCs) to form multi-layered SnO2@Fe2O3 sandwich nanocubes (SNCs). The crystallinity and morphological characteristics confirm that the dense well-aligned Fe2O3 nanorods vertically cover all surfaces of the SnO2 layers...
November 16, 2017: Nanoscale
https://www.readbyqxmd.com/read/29110779/dosing-collection-and-quality-control-issues-in-cerebrospinal-fluid-research-using-animal-models
#11
Donna M Barten, Gregory W Cadelina, Michael R Weed
Cerebrospinal fluid (CSF) is a complex fluid filling the ventricular system and surrounding the brain and spinal cord. Although the bulk of CSF is created by the choroid plexus, a significant fraction derives from the interstitial fluid in the brain and spinal cord parenchyma. For this reason, CSF can often be used as a source of pharmacodynamic and prognostic biomarkers to reflect biochemical changes occurring within the brain. For instance, CSF biomarkers can be used to diagnose and track progression of disease as well as understand pharmacokinetic and pharmacodynamic relationships in clinical trials...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/29098237/-comparative-evaluation-of-marginal-microleakage-of-three-different-resins-in-class-v-composite-restorations
#12
Zheng Zhu, Ya-Qin Zhu
PURPOSE: To compare and evaluate microleakage at the occlusal wall and cervical wall in Class V cavities restored with Ivoclar Tetric N Ceram Bulk Fill composite, Tetric N Flow composite and N Ceram nanocomposite. METHODS: Sixty-six extracted human maxillary premolars, which were intact and healthy, were randomly assigned into 3 groups (n=22). Standardized Class V cavities were prepared on the buccal surface of maxillary premolars. The occlusal walls of the cavities were located on the enamel and the cervical walls were located on dentin and cementum...
June 2017: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/29097810/hydrogen-storage-and-stability-properties-of-pd-pt-solid-solution-nanoparticles-revealed-via-atomic-and-electronic-structure
#13
Loku Singgappulige Rosantha Kumara, Osami Sakata, Hirokazu Kobayashi, Chulho Song, Shinji Kohara, Toshiaki Ina, Toshiki Yoshimoto, Satoru Yoshioka, Syo Matsumura, Hiroshi Kitagawa
Bimetallic Pd1-x Pt x solid-solution nanoparticles (NPs) display charging/discharging of hydrogen gas, which has relevance for fuel cell technologies; however, the constituent elements are immiscible in the bulk phase. We examined these material systems using high-energy synchrotron X-ray diffraction, X-ray absorption fine structure and hard X-ray photoelectron spectroscopy techniques. Recent studies have demonstrated the hydrogen storage properties and catalytic activities of Pd-Pt alloys; however, comprehensive details of their structural and electronic functionality at the atomic scale have yet to be reported...
November 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29096439/capillary-effect-enabled-water-electrolysis-for-enhanced-electrochemical-ozone-production-by-using-bulk-porous-electrode
#14
Chen Zhang, Yingfeng Xu, Ping Lu, Xiaohua Zhang, FangFang Xu, Jianlin Shi
A significant overpotential necessary for the electrochemical oxygen evolution reaction (OER) is one of the most serious disad-vantages in water electrolysis, which, on the contrary, gives the probability to electrochemically produce ozone alternative to the common corona discharge. To effectively suppress the competitive OER and improve gaseous ozone escaping, here, we present a capillary effect-enabled electrolysis strategy by employing an unusual partial-submersed mode of anode composed of a β-PbO2 cuboids-loaded bulk porous Pb, and realize a much enhanced electrocatalytic gaseous ozone production in comparison to the cases of solid Pb counterpart and/or usual submersion operation...
November 2, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29091424/resolving-and-tuning-carrier-capture-rates-at-a-single-silicon-atom-gap-state
#15
Mohammad Rashidi, Erika Lloyd, Taleana R Huff, Roshan Achal, Marco Taucer, Jeremiah J Croshaw, Robert A Wolkow
We report on tuning the carrier capture events at a single dangling bond (DB) midgap state by varying the substrate temperature, doping type, and doping concentration. All-electronic time-resolved scanning tunneling microscopy (TR-STM) is employed to directly measure the carrier capture rates on the nanosecond time scale. A characteristic negative differential resistance (NDR) feature is evident in the scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS) measurements of DBs on both n and p-type doped samples...
November 1, 2017: ACS Nano
https://www.readbyqxmd.com/read/29034597/effect-of-composite-type-and-placement-technique-on-cuspal-strain
#16
Vilhelm G Ólafsson, André V Ritter, Edward J Swift, Lee W Boushell, Ching-Chang Ko, Gabrielle R Jackson, Sumitha N Ahmed, Terence E Donovan
OBJECTIVE: To compare the cuspal strain in Class II restorations made with bulk-fill and conventional composite resins. MATERIALS AND METHODS: Fifty extracted maxillary premolars were mounted into phenolic rings and divided into five groups (n = 10). Specimens received standardized MOD preparations. A two-step self-etch adhesive was applied and the preparations were restored using a custom matrix as follows: Filtek Supreme Ultra in eight 2-mm increments (FSUI); Filtek Supreme Ultra in bulk (FSUB); SonicFill in bulk (SF); SureFil SDR flow in bulk, covered with a 2-mm occlusal layer of Filtek Supreme Ultra (SDR/FSU); Tetric EvoCeram Bulk Fill in bulk (TEBF)...
October 16, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/29019552/water-sorption-and-solubility-of-bulk-fill-composites-polymerized-with-a-third-generation-led-lcu
#17
Tuğba Misilli, Nihan Gönülol
The aim of this study was to compare the degree of water sorption and solubility in bulk-fills after curing with a polywave light source. A total of 120 disc-shaped specimens (8 mm diameter; 4 mm depth) were prepared from three regular bulk-fill materials (X-tra Fil, Tetric N-Ceram Bulk Fill, SonicFill), and a control material (Filtek Z250), cured in 3 different modes (standard: 1000 mW/cm2-20 s; high power: 1400 mW/cm2-12 s; xtra power: 3200 mW/cm2-6 s) using a third generation light-emitting diode light curing unit...
September 28, 2017: Brazilian Oral Research
https://www.readbyqxmd.com/read/28986905/deletion-mutagenesis-and-identification-of-causative-mutations-in-maize
#18
Shangang Jia, Aixia Li, Chi Zhang, David Holding
We describe a method for gamma-irradiation of mature maize seeds to generate mutants with opaque endosperm and reduced kernel fill phenotypes. We also describe methods for mapping mutants and identifying causal gene mutations. Using this method, a population of 1788M2 families and 47 Mo17 × F2s showing stable, segregating, and viable kernel phenotypes was developed. For molecular characterization of the mutants, we utilized a novel functional genomics platform that combines separate Bulked Segregant RNA and exome sequencing data sets (BSREx-seq) to map causative mutations and identify candidate genes within mapping intervals...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28976846/polymerization-behavior-and-mechanical-properties-of-high-viscosity-bulk-fill-and-low-shrinkage-resin-composites
#19
S Shibasaki, T Takamizawa, K Nojiri, A Imai, A Tsujimoto, H Endo, S Suzuki, S Suda, W W Barkmeier, M A Latta, M Miyazaki
The present study determined the mechanical properties and volumetric polymerization shrinkage of different categories of resin composite. Three high viscosity bulk fill resin composites were tested: Tetric EvoCeram Bulk Fill (TB, Ivoclar Vivadent), Filtek Bulk Fill posterior restorative (FB, 3M ESPE), and Sonic Fill (SF, Kerr Corp). Two low-shrinkage resin composites, Kalore (KL, GC Corp) and Filtek LS Posterior (LS, 3M ESPE), were used. Three conventional resin composites, Herculite Ultra (HU, Kerr Corp), Estelite ∑ Quick (EQ, Tokuyama Dental), and Filtek Supreme Ultra (SU, 3M ESPE), were used as comparison materials...
November 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28976845/radiopacity-and-porosity-of-bulk-fill-and-conventional-composite-posterior-restorations-digital-x-ray-analysis
#20
C J Soares, Cmp Rosatto, V F Carvalho, A A Bicalho, Jcg Henriques, A L Faria-E-Silva
OBJECTIVES: To compare radiopacity and porosity as expressed by the presence of voids in restorations carried out using bulk-fill and incremental filling techniques to restore large mesio-occlusal-distal (MOD) cavities. METHODS: Fifty-five molars with MOD preparations were incrementally filled with Filtek Z-350XT (Z350XT) or bulk-fill composite: Filtek Bulk Fill/Z-350XT (FBF/Z350XT), Venus Bulk Fill/Charisma Diamond (VBF/CHA), SDR/Esthet-X HD (SDR/EST-X), Tetric EvoCeram Bulk Fill (TEC)...
November 2017: Operative Dentistry
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