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https://www.readbyqxmd.com/read/28344796/quality-of-colonoscopy-in-an-emerging-country-a-prospective-multicentre-study-in-russia
#1
Mariya Antipova, Mikhail Burdyukov, Mikhail Bykov, Leonid Domarev, Evgeny Fedorov, Sergey Gabriel, Konstantin Glebov, Sergey Kashin, Mikhail Knyazev, Aleksey Korotkevich, Andrey Kotovsky, Irina Kruglova, Vladimir Krushelnitsky, Ekaterina Mayat, Mikhail Merzlyakov, Dmitry Mtvralashvili, Aleksander Pyrkh, Oleg Sannikov, Evgeny Shitikov, Alexander Subbotin, Alexander Taran, Viktor Veselov, Dmitry Zavyalov, Cesare Hassan, Franco Radaelli, Lorenzo Ridola, Alessandro Repici, Mikhail Korolev
BACKGROUND: The quality of colonoscopy has been related to a higher risk of interval cancer, and this issue has been addressed extensively in developed countries. The aim of our study was to explore the main quality indicators of colonoscopy in a large emerging country. METHODS: Consecutive patients referred for colonoscopy in 14 centres were prospectively included between July and October 2014. Before colonoscopy, several clinical and demographic variables were collected...
March 2017: United European Gastroenterology Journal
https://www.readbyqxmd.com/read/28343677/influence-of-adhesive-cementation-systems-on-the-bond-strength-of-relined-fiber-posts-to-root-dentin
#2
Raquel Viana Rodrigues, Camila Sobral Sampaio, Rafael Rocha Pacheco, Fernanda Miori Pascon, Regina Maria Puppin-Rontani, Marcelo Giannini
STATEMENT OF PROBLEM: Glass fiber post cementation procedures have undergone significant development. Relining the post with composite resin is a technique that aims to reduce resin cement thickness and consequently problems inherent to polymerization. Evidence is sparse regarding the efficacy of bonding procedures at increasing depths (from cervical to apical) using different adhesive cementation techniques. PURPOSE: The purpose of this in vitro study was to evaluate the push-out bond strength (PBS) of composite resin relined glass fiber posts cemented to bovine root dentin using different adhesive cementation protocols...
March 23, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28339180/a-study-of-oxygen-evolution-reaction-catalytic-behavior-of-coxni1-xfe2o4-in-alkaline-medium
#3
Viruthasalam Maruthapandian, Mahendran Mathankumar, Velu Saraswathy, Balasubramanian Subramanian, Srinivasan Muralidharan
Catalysts for the oxygen evolution reaction (OER) play an important role in the conversion of solar energy to fuel of earth abundant water into H2 and O2 through splitting/electrolyzer. The heterogeneous electrocatalysts for hydrogen and oxygen evolution reactions (HER and OER) exhibit catalytic activity that depends on the electronic properties, oxidation states and local surface structure. Spinel ferrites (MFe2O4; M = Ni and Co) based materials have been attractive for the catalytic water oxidation due to their well-known stability in alkaline medium, easy synthesis, existence of metal cations with various oxidation states, low cost and tunable properties by the desired metal substitution...
March 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28335266/synthesis-of-p-co%C3%A2-o%C3%A2-n-tio%C3%A2-nanoparticles-for-overall-water-splitting-under-visible-light-irradiation
#4
Qiang Zhang, Zhenyin Hai, Aoqun Jian, Hongyan Xu, Chenyang Xue, Shengbo Sang
p-Co₃O₄/n-TiO₂ nanoparticles (~400 nm) for photocatalysis were prepared via carbon assisted method and sol-gel method in this work. The paper also studied the application of visible light illuminated p-Co₃O₄/n-TiO₂ nanocomposites cocatalyst to the overall pure water splitting into H₂ and O₂. In addition, the H₂ evolution rate of the p-Co₃O₄/n-TiO₂ nanocomposites is 25% higher than that of the pure Co₃O₄ nanoparticles. Besides, according to the results of the characterizations, the scheme of visible light photocatalytic water splitting is proposed, the Co₃O₄ of the nanocomposites is excited by visible light, and the photo-generated electrons and holes existing on the conduction band of Co₃O₄ and valence band of TiO₂ have endowed the photocatalytic evolution of H₂ and O₂ with higher efficiency...
July 27, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28333437/a-tio2-femnp-core-shell-nanorod-array-photoanode-for-efficient-photoelectrochemical-oxygen-evolution
#5
Desmond E Schipper, Zhenhuan Zhao, Andrew P Leitner, Lixin Xie, Fan Qin, Md Kamrul Alam, Shuo Chen, Dezhi Wang, Zhifeng Ren, Zhiming Wang, Jiming Bao, Kenton H Whitmire
A variety of catalysts have been developed for electrocatalytic oxygen evolution, but very few of them can be readily integrated with semiconducting light absorbers for photoelectrochemical or photocatalytic water splitting. Here, we demonstrate an efficient core/shell photoanode with a highly active oxygen evolution electrocatalyst shell (FeMnP) and semiconductor core (rutile TiO2) for photoelectrochemical oxygen evolution reaction (PEC-OER). Metal-organic chemical vapor deposition (MOCVD) from a single-source precursor was used to ensure good contact between the FeMnP and the TiO2...
March 23, 2017: ACS Nano
https://www.readbyqxmd.com/read/28332812/hierarchical-nico2s4-nife-ldh-heterostructures-supported-on-nickel-foam-for-enhanced-overall-water-splitting-activity
#6
Jia Liu, Jinsong Wang, Bao Zhang, Yunjun Ruan, Lin Lv, Xiao Ji, Kui Xu, Ling Miao, Jianjun Jiang
Low cost and high efficient bifunctional electrocatalysts for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) are intensively investigated for overall water splitting. Herein, we combined experimental researches with first-principles calculations based on density functional theory (DFT) to engineer the NiCo2S4@NiFe LDH heterostructures interface for enhancing overall water splitting activity. The DFT calculations exhibit a strong interaction and charge transfer between NiCo2S4 and NiFe LDH, which change the interfacial electronic structure and surface reactivity...
March 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28332635/microstructure-formation-and-interface-characteristics-of-directionally-solidified-tial-si-alloys-in-alumina-crucibles-with-a-new-y2o3-skull-aided-technology
#7
Jianglei Fan, Jianxiu Liu, Shen Wu, Shuxia Tian, Hongxia Gao, Shengyong Wang, Jingjie Guo, Xiao Wang
The microstructure evolution and interface characteristics of a directionally solidified Ti-43Al-3Si (at.%) alloy in an alumina (Al2O3) crucible with new Y2O3 skull-aided technology were investigated. The Y2O3-skull that is in contact with the TiAl-melt is relatively stable, which results in a more controlled reaction between the skull and the melt than in the case of an Al2O3 crucible is used. A thin reaction layer was formed between the mould and the melt through mutual diffusion. The layer thickness increased with increasing reaction time...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28323389/atomic-force-microscopy-in-the-production-of-a-biovital-skin-graft-based-on-human-acellular-dermal-matrix-produced-in-house-and-in-vitro-cultured-human-fibroblasts
#8
Wojciech Łabuś, Justyna Glik, Agnieszka Klama-Baryła, Diana Kitala, Małgorzata Kraut, Mariusz Maj, Mariusz Nowak, Marcelina Misiuga, Andrzej Marcinkowski, Barbara Trzebicka, Ryszard Poloczek, Marek Kawecki
The most efficient method in III° burn treatment is the use of the autologous split thickness skin grafts that were donated from undamaged body area. The main limitation of this method is lack of suitable donor sites. Tissue engineering is a useful tool to solve this problem. The goal of this study was to find the most efficient way of producing biovital skin substitute based on in house produced acellular dermal matrix ADM and in vitro cultured fibroblasts. Sixty samples of sterilized human allogeneic skin (that came from 10 different donors) were used to examine the influence of decellularizing substances on extracellular matrix and clinical usefulness of the test samples of allogeneic human dermis...
March 21, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28321242/aggressive-plaque-modification-with-rotational-atherectomy-and-cutting-balloon-for-optimal-stent-expansion-in-calcified-lesions
#9
Zhe Tang, Jing Bai, Shao-Ping Su, Pui-Wai Lee, Liang Peng, Tao Zhang, Ting Sun, Jing-Guo Nong, Tian-De Li, Yu Wang
OBJECTIVE: To evaluate the factors affecting optimal stent expansion in calcified lesions treated by aggressive plaque modification with rotational atherectomy (RA) and a cutting balloon (CB). METHODS: From January 2014 to May 2015, 92 patients with moderate to severe coronary calcified lesions underwent rotational atherectomy and intravascular ultrasound imaging at Chinese PLA General Hospital (Beijing, China) were included in this study. They were divided into a rotational artherectomy combined with cutting balloon (RACB) group (46 patients treated with RA followed by CB angioplasty) and an RA group (46 patients treated with RA followed by plain balloon angioplasty)...
December 2016: Journal of Geriatric Cardiology: JGC
https://www.readbyqxmd.com/read/28299554/comparison-of-different-techniques-for-removal-of-calcium-hydroxide-from-straight-root-canals-an-in-vitro-study
#10
Anne-Kathrin Pabel, Michael Hülsmann
To compare four different techniques for removal of calcium hydroxide from straight root canals. The present study used the design suggested by Lee et al. (Int Endod J 37:607-612, 32) and van der Sluis et al. (Int Endod J 40:52-57, 17). One-hundred and ten extracted human teeth with straight root canals were prepared to ISO-size 50 and split longitudinally. Two lateral grooves were prepared, filled with calcium hydroxide and the root halves reassembled in a muffle. Calcium hydroxide was removed using one of five techniques: (1) passive ultrasonic irrigation, (2) hydrodynamic irrigation using RinsEndo(®), (3) sonic irrigation using the EndoActivator(®), (4) motor-driven plastic brush (CanalBrush™), and (5) manual irrigation with a syringe as the control group...
March 15, 2017: Odontology
https://www.readbyqxmd.com/read/28295342/an-information-theory-account-of-late-frontoparietal-erp-positivities-in-cognitive-control
#11
Francisco Barceló, Patrick S Cooper
ERP research on task switching has revealed distinct transient and sustained positive waveforms (latency circa 300-900 ms) while shifting task rules or stimulus-response (S-R) mappings. However, it remains unclear whether such switch-related positivities show similar scalp topography and index context-updating mechanisms akin to those posed for domain-general (i.e., classic P300) positivities in many task domains. To examine this question, ERPs were recorded from 31 young adults (18-30 years) while they were intermittently cued to switch or repeat their perceptual categorization of Gabor gratings varying in color and thickness (switch task), or else they performed two visually identical control tasks (go/no-go and oddball)...
March 15, 2017: Psychophysiology
https://www.readbyqxmd.com/read/28291237/comparison-of-two-intensive-bowel-cleansing-regimens-in-patients-with-previous-poor-bowel-preparation-a-randomized-controlled-study
#12
Antonio Z Gimeno-García, Goretti Hernandez, Ana Aldea, David Nicolás-Pérez, Alejandro Jiménez, Marta Carrillo, Vanesa Felipe, Onofre Alarcón-Fernández, Manuel Hernandez-Guerra, Rafael Romero, Inmaculada Alonso, Yanira Gonzalez, Zaida Adrian, Miguel Moreno, Laura Ramos, Enrique Quintero
OBJECTIVES: Inadequate bowel cleansing is a major burden for endoscopy units. The aim of this study was to compare two intensive bowel cleansing regimens in patients with previous colonoscopy with inadequate bowel preparation. METHODS: Patients with inadequate cleansing at index colonoscopy were randomized to 4-L split-dose polyethylene-glycol (PEG) regimen vs. 2-L split-dose PEG plus ascorbic acid (PEG+Asc) regimen. All individuals underwent a 3-day low-residue diet and received 10 mg of bisacodyl, the day before colonoscopy...
March 14, 2017: American Journal of Gastroenterology
https://www.readbyqxmd.com/read/28286624/a-biomechanical-comparison-of-4-strand-and-5-strand-anterior-cruciate-ligament-graft-constructs
#13
Matthew L Broadhead, Animesh A Singla, Nicky Bertollo, David Broe, William R Walsh
Hamstring tendon autografts are used for reconstruction of the anterior cruciate ligament. This study tested the hypothesis that a 5-strand hamstring autograft construct is superior in strength to a 4-strand construct. Four-strand and 5-strand tendon grafts constructs were prepared from ovine flexor tendons and then tested in a uniaxial electromechanical load system with suspensory fixation. The 4-strand and 5-strand constructs were pre-conditioned, stress-relaxed and loaded to ultimate failure. Stress-relaxation, stiffness and ultimate load were compared using a one-way ANOVA...
February 20, 2017: Orthopedic Reviews
https://www.readbyqxmd.com/read/28284194/clonocalc-and-clonoplot-immune-repertoire-analysis-from-raw-files-to-publication-figures-with-graphical-user-interface
#14
Anke Fähnrich, Moritz Krebbel, Normann Decker, Martin Leucker, Felix D Lange, Kathrin Kalies, Steffen Möller
BACKGROUND: Next generation sequencing (NGS) technologies enable studies and analyses of the diversity of both T and B cell receptors (TCR and BCR) in human and animal systems to elucidate immune functions in health and disease. Over the last few years, several algorithms and tools have been developed to support respective analyses of raw sequencing data of the immune repertoire. These tools focus on distinct aspects of the data processing and require a strong bioinformatics background...
March 11, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/28282689/water-exchange-for-screening-colonoscopy-increases-adenoma-detection-rate-a-multicenter-double-blinded-randomized-controlled-trial
#15
Sergio Cadoni, Přemysl Falt, Emanuele Rondonotti, Franco Radaelli, Petr Fojtik, Paolo Gallittu, Mauro Liggi, Arnaldo Amato, Silvia Paggi, Vit Smajstrla, Ondřej Urban, Matteo Erriu, Malcolm Koo, Felix W Leung
Background and study aims Single-center studies, which were retrospective and/or involved unblinded colonoscopists, have suggested that water exchange, but not water immersion, compared with air insufflation significantly increases the adenoma detection rate (ADR), particularly in the proximal and right colon. Head-to-head comparison of the three techniques with ADR as primary outcome and blinded colonoscopists has not been reported to date. In a randomized controlled trial with blinded colonoscopists, we aimed to evaluate the impact of the three insertion techniques on ADR...
March 10, 2017: Endoscopy
https://www.readbyqxmd.com/read/28280284/the-fiber-optic-system-for-the-advanced-topographic-laser-altimeter-system-atlas-instrument
#16
Melanie N Ott, Joe Thomes, Eleanya Onuma, Robert Switzer, Richard Chuska, Diana Blair, Erich Frese, Marc Matyseck
The Advanced Topographic Laser Altimeter System (ATLAS) Instrument has been in integration and testing over the past 18 months in preparation for the Ice, Cloud and Land Elevation Satellite - 2 (ICESat-2) Mission, scheduled to launch in 2017. ICESat-2 is the follow on to ICESat which launched in 2003 and operated until 2009. ATLAS will measure the elevation of ice sheets, glaciers and sea ice or the "cryosphere" (as well as terrain) to provide data for assessing the earth's global climate changes. Where ICESat's instrument, the Geo-Science Laser Altimeter (GLAS) used a single beam measured with a 70 m spot on the ground and a distance between spots of 170 m, ATLAS will measure a spot size of 10 m with a spacing of 70 cm using six beams to measure terrain height changes as small as 4 mm...
August 28, 2016: Proceedings of SPIE
https://www.readbyqxmd.com/read/28274042/evaluation-of-the-shear-bond-strength-of-composite-resin-to-wet-and-dry-enamel-using-dentin-bonding-agents-containing-various-solvents
#17
Carounanidy Usha, Sathyanarayanan Ramarao, Bindu Meera John, Praveen Rajesh, S Swatha
INTRODUCTION: Bonding of composite resin to dentin mandates a wet substrate whereas, enamel should be dry. This may not be easily achievable in intracoronal preparations where enamel and dentin are closely placed to each other. Therefore, Dentin Bonding Agents (DBA) are recommended for enamel and dentinal bonding, where enamel is also left moist. A research question was raised if the "enamel-only" preparations will also benefit from wet enamel bonding and contemporary DBA. AIM: The aim of this study was to compare the shear bond strengths of composite resin, bonded to dry and wet enamel using fifth generation DBA (etch and rinse system) containing various solvents such as ethanol/water, acetone and ethanol...
January 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28272621/fluorescence-property-of-photosystem-ii-protein-complexes-bound-to-a-gold-nanoparticle
#18
Kazuki Tahara, Ahmed Mohamed, Kousuke Kawahara, Ryo Nagao, Yuki Kato, Hiroshi Fukumura, Yutaka Shibata, Takumi Noguchi
Development of an efficient photo-anode system for water oxidation is key to the success of artificial photosynthesis. We previously assembled photosystem II (PSII) proteins, which are an efficient natural photocatalyst for water oxidation, on a gold nanoparticle (GNP) to prepare a PSII-GNP conjugate as an anode system in a light-driven water-splitting nano-device (Noji et al., J. Phys. Chem. Lett., 2011, 2, 2448-2452). In the current study, we characterized the fluorescence property of the PSII-GNP conjugate by static and time-resolved fluorescence measurements, and compared with that of free PSII proteins...
March 8, 2017: Faraday Discussions
https://www.readbyqxmd.com/read/28267011/comparative-evaluation-of-the-efficacy-of-polyethylene-glycol-with-ascorbic-acid-and-an-oral-sulfate-solution-in-a-split-method-for-bowel-preparation-a-randomized-multicenter-phase-iii-clinical-trial
#19
Bun Kim, Seong Dae Lee, Kyung Su Han, Byung Chang Kim, Eui-Gon Youk, Myung Jin Nam, Doo Han Lee, Dae Kyung Sohn
BACKGROUND: An adequate level of bowel preparation before colonoscopy is important. The ideal agent for bowel preparation should be effective and tolerable. OBJECTIVE: The purpose of this study was to compare the clinical efficacy and tolerability of polyethylene glycol with ascorbic acid and oral sulfate solution in a split method for bowel preparation. DESIGN: This was a prospective, multicenter, randomized controlled clinical trial. SETTINGS: Outpatients at the specialized clinics were included...
April 2017: Diseases of the Colon and Rectum
https://www.readbyqxmd.com/read/28262883/spiky-tio2-au-nanorod-plasmonic-photocatalysts-with-enhanced-visible-light-photocatalytic-activity
#20
Hang Sun, Shan Zeng, Qinrong He, Ping She, Kongliang Xu, Zhenning Liu
A facile approach for the preparation of spiky TiO2/Au nanorod (NR) plasmonic photocatalysts has been demonstrated, which is through in situ nucleation and growth of spiky TiO2 onto AuNRs. Different aspect ratios of AuNRs in 2.5, 2.7, 4.1 and 4.5 have been applied to prepare spiky TiO2/AuNR nanohybrids to achieve tunable and broad localized surface plasmon resonance (LSPR) bands. All spiky TiO2/AuNR nanohybrids exhibit enhanced light harvesting by extending visible light absorption range by both transverse and longitudinal LSPR bands and decreasing light reflectance by their unique spiky structures...
March 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
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