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J Lüker, A Sultan, T Plenge, J van den Bruck, C-H Heeger, S Meyer, K Mischke, R R Tilz, D Vollmann, G Nölker, B Schäffer, S Willems, D Steven
AIMS: A relevant number of patients presenting for electrical cardioversion carry a pacemaker (PM) or ICD. Case reports suggest a potential hazard of external cardioversion/defibrillation. The incidence of shock related device complications is unknown. No guidelines or recommendations by international medical societies for a cardioversion protocol of cardiovascular implantable electronic device (CIED) patients exist. We conducted a nationwide survey to gather real-world clinical data on the current clinical approach towards these patients during electrical cardioversion and to estimate the incidence of shock-related complications...
November 18, 2017: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
Shiyang Shao, Jun Hu, Xingdong Wang, Lixiang Wang, Xiabin Jing, Fosong Wang
We demonstrate a novel molecular design concept for thermally activated delayed fluorescence (TADF) polymers based on a nonconjugated polyethylene backbone with through-space charge transfer effect between pendant electron donor (D) and electron acceptor (A) units. Different from conventional conjugated D-A polymers with through-bond charge transfer effect, the nonconjugated architecture avoids the direct conjugation between D and A units, enabling us to realize blue emission. Meanwhile, the spatial π-π interaction between the physically separated D and A units results in both small singlet-triplet energy splitting (0...
November 17, 2017: Journal of the American Chemical Society
Arif Karademir, Cem Aydemir, Dogan Tutak, Raja Aravamuthan
BACKGROUND: In our contemporary world, while part of the fibers used in the paper industry is obtained from primary fibers such as wood and agricultural plants, the rest is obtained from secondary fibers from waste papers. To manufacture paper with high optical quality from fibers of recycled waste papers, these papers require deinking and bleaching of fibers at desired levels. High efficiency in removal of ink from paper mass during recycling, and hence deinkability, are especially crucial for the optical and printability quality of the ultimate manufactured paper...
November 11, 2017: Journal of Applied Biomaterials & Functional Materials
Sung-Hyun Joo, Kyu-Won Lee, Young-Hwa Hwang, Seon-Tea Joo
The objective of this study was to determine the relationship between composition of muscle fiber types and meat quality traits of eight major muscles from Hanwoo steers. Longissimus lumborum (LL), psoas major (PM), semimembranosus (SM), semitendinosus (ST), gluteus medius (GM), triceps brachii (TB), rectus abdominis (RA) and superficialis flexor (SF) muscles were obtained from 9 Hanwoo steers and subjected to histochemical analysis. There were significant (p<0.05) differences in fiber number percentage (FNP) and fiber area percentage (FAP) of fiber types among these 8 major muscles...
2017: Korean Journal for Food Science of Animal Resources
Hee-Kyung Kim, Sung-Hun Kim
PURPOSE: The purpose of this study was to compare the optical properties of pre-colored dental monolithic zirconia ceramics of various thicknesses sintered in a microwave and those in a conventional furnace. MATERIALS AND METHODS: A2-shade of pre-colored monolithic zirconia ceramic specimens (22.0 mm × 22.0 mm) in 3 thickness groups of 0.5, 1.0, and 1.5 mm were divided into 2 subgroups according to the sintering methods (n=9): microwave and conventional sintering...
October 2017: Journal of Advanced Prosthodontics
Pragyan Pallavi, Bahadur Sk, Palak Ahir, Abhijit Patra
A simple and cost-effective methodology employing environmentally benign substances for the fabrication of white-light emitting materials is important for practical applications in the field of lighting and display devices. Designing of purely organic-based white-light emitting system with high quantum efficiency in the aqueous medium is an unmet challenge. With this objective, a new class of pyridoindole based hydrophobic fluorophore 6,7,8,9-tetrapropylpyrido[1,2-a]indole-10-carbaldehye (TPIC) was introduced...
November 14, 2017: Chemistry: a European Journal
Olivier A Witte, Ahmet Adiyaman, Marnix W van Bemmel, Jaap Jan J Smit, Abdul Ghani, Anand R Ramdat Misier, Arif Elvan, Peter Paul Hm Delnoy
INTRODUCTION: Chronic venous occlusion hampers lead revisions and upgrades in patients with a cardiac implantable electronic devices (CIEDs). This can make cardiothoracic surgery, venoplasty or contra-lateral implantation of leads with tunneling necessary. A technique using venous recanalization may be a preferred alternative. We assessed the efficacy and safety of this new technique. METHODS AND RESULTS: From 2009-2016 all consecutive patients planned for lead revision or upgrade with known chronic venous occlusion were studied...
November 13, 2017: Journal of Cardiovascular Electrophysiology
Muhammet Karci, Necla Demir
PURPOSE: To evaluate the effect of a home bleaching agent (Opalescence PF) on the translucency of CAD/CAM ceramic systems. MATERIALS AND METHODS: The 28 sintered ceramic specimens (IPS Empress CAD and IPS e.max CAD; 15 mm long, 10 mm wide, 1 mm thick) were divided into two subgroups as control and bleaching groups (n = 7). Carbamide peroxide (CP), 16%, home bleaching agent was applied onto the surface of each specimen for 6 hours per day for 7 days. A spectrophotometer (VITA Easyshade Advance) was used to measure the CIE L(*) a(*) b(*) coordinates and the reflectance value (Y) of the specimens on white and black backgrounds...
November 10, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
Lefu Mei, Haikun Liu, Libing Liao, Yuanyuan Zhang, R Vasant Kumar
A novel red-emitting phosphor NaY9(SiO4)6O2:Sm(3+) (NYS:Sm(3+)) was synthesized and the X-ray diffraction and high-resolution TEM testified that the NYS compound belongs to the apatite structure which crystallized in a hexagonal unit cell with space group P63/m. The novel phosphor boasts of such three advantageous properties as perfect compatible match with the commercial UV chips, 73.2% quantum efficiency and 90.9% thermal stability at 150 °C. Details are as follows. NYS:Sm(3+) phosphor showed obvious absorption in the UV regions centered at 407 nm, which can be perfectly compatible with the commercial UV chips...
November 9, 2017: Scientific Reports
Timothy G Shepard, Safiya I Lahlaf, Rhea T Eskew
Six linear chromatic mechanisms are sufficient to account for the pattern of threshold elevations produced by chromatic noise masking in the (L,M) plane of cone space (Shepard, Swanson, McCarthy, & Eskew, 2016). Here, we report results of asymmetric color matching of the threshold-level tests from that detection study and use those matches to test the detection model. We assume the mechanisms are univariant labeled lines (Rushton, 1972; Watson & Robson, 1981), implying that the chromaticities of physically different stimuli that are detected by a single mechanism should all be the same-they are postreceptoral metamers-but the chromaticities of two stimuli detected by different mechanisms should be different...
November 1, 2017: Journal of Vision
Kohei Matsui, Susumu Oda, Kazuki Yoshiura, Kiichi Nakajima, Nobuhiro Yasuda, Takuji Hatakeyama
One-shot double, triple, and quadruple borylation reactions of triarylamines were developed through a judicious choice of boron source and Brønsted base. With the aid of borylation reactions, a variety of BN-doped nanographenes were synthesized in two steps from commercially available starting materials. An organic light-emitting diode device employing BN-doped nanographene as an emitter exhibited deep pure-blue emission at 460 nm, with CIE coordinates of (0.13, 0.11), and an external quantum efficiency of 18...
November 9, 2017: Journal of the American Chemical Society
Lili Xing, Weiqi Yang, Jincheng Lin, Mei Huang, Yuqi Xue
A strategy to enhance the upconversion white-light intensity via Mg(2+) ion doping was demonstrated in Ho(3+)/Yb(3+)/Tm(3+)/LiNbO3 single crystal. It is found Mg(2+) ion doping affects the crystal field symmetry around RE(3+) ions and enhance the upconversion emission intensity. Bright white-light is obtained when the Mg(2+) ion concentration is 0.5 mol% in the melt. And the CIE coordinates are hardly changed with Mg(2+) ion doping. In addition, the upconversion mechanism is discussed in detail. It is observed the longer lifetimes of intermediate levels result in the lower upconversion photon numbers, which are beneficial to the upconversion process...
November 7, 2017: Scientific Reports
Reza Derafshi, Hooman Khorshidi, Mohamadhasan Kalantari, Ilyad Ghaffarlou
BACKGROUND: Patients susceptible to periodontal disease and dental caries, including those who undergo fixed prosthodontic treatments use chemical plaque control agents. However, these mouthrinses may result in adverse effects such as discoloration of the restorative materials. The aim of this study was to compare the color stability of monolithic zirconia and feldspathic porcelain after immersion in two different mouthrinses: 0.2% Chlorhexidine digluconate (CHX), or Listerine®. Color change was evaluated by color spectrophotometer and according to the Commission Internationale de l'Eclairage (CIELab) system...
November 7, 2017: BMC Oral Health
Jeffrey J Cies, Wayne S Moore, Adela Enache, Arun Chopra
OBJECTIVES: To determine whether contemporary β-lactam anti-infective dosing recommendations in critically ill children achieve concentrations associated with maximal anti-infective activity. The secondary objective was to describe the microbiological and clinical outcomes associated with β-lactam therapeutic drug management. DESIGN: Electronic Medical Record Review. SETTING: A 189-bed, freestanding children's tertiary care teaching hospital in Philadelphia, PA...
November 3, 2017: Critical Care Medicine
Jordana K Schmier, Edmund C Lau, Jasmine D Patel, Juergen A Klenk, Arnold J Greenspon
INTRODUCTION: The effects of device and patient characteristics on health and economic outcomes in patients with cardiac implantable electronic devices (CIEDs) are unclear. Modeling can estimate costs and outcomes for patients with CIEDs under a variety of scenarios, varying battery longevity, comorbidities, and care settings. The objective of this analysis was to compare changes in patient outcomes and payer costs attributable to increases in battery life of implantable cardiac defibrillators (ICDs) and cardiac resynchronization therapy defibrillators (CRT-D)...
November 6, 2017: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
Thokchom Taru Taru Chanu, N Rajmuhon Singh
A series of monophasic Tb(3+) (2, 5, 7, 10 and 15at%) doped PbWO4 phosphors were successfully prepared via hydrothermal method. X-ray diffraction patterns revealed that the prepared samples possess a high crystallinity with tetragonal scheelite-type structure. FT-IR and Raman analysis exhibited a WO stretching peak of WO4(2-) group, which is also related to the scheelite structure. UV-visible diffuse reflectance spectra indicated a reduction in the optical band gap with the replacement of Pb(2+) by Tb(3+) ions...
October 26, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Roselaine Terezinha Pozzobon, Thaís Camponogara Bohrer, Patrícia Eliana Fontana, Leticia Brandão Durand, Marcela Marquezan
Polishing techniques are known to enhance the longevity and appearance of composite resin restorations. However, the influence of the timing of polishing on the final results of a restoration is not well documented. The aim of this study was to determine the effect of immediate and delayed polishing on the color stability of a composite resin. Sixty composite resin specimens were fabricated and randomly divided into 2 groups according to immersion solutions: group 1, deionized water (control); and group 2, coffee (as staining solution)...
November 2017: General Dentistry
Si Si Zhao, Lei Wang, Yingjie Liu, Li Chen, Zhigang Xie
Two Cu(I) cluster based coordination polymers, [CuI(cis-bpype)]·CH3CN (1) and [Cu4I4(cis-bpype)3(trans-bpype)]·3DMF (2), have been synthesized from cis- and trans-1,2-bis(4-(pyridin-2-yl)phenyl)ethane (cis- and trans-bpype) ligands and {Cu4I4(PPh3)4} as starting materials. In compound 1, adjacent rhomboid-type {Cu2I2} units from the decomposition of {Cu4I4(PPh3)4} starting material connect by cis-bpype ligands to form a 1D framework. Compound 2 also has a 1D structure, but it has a {M2L3}-type coordinated cage constructed by three cis-bpype ligands and two {Cu4I4} secondary building units (SBU), and these coordination cages further link by trans-bpype to form the final frameworks...
November 3, 2017: Inorganic Chemistry
Somosmita Mitra, Subhashis Banerjee, Yoichi Hayashi
Medical image processing has become a major player in the world of automatic tumour region detection and is tantamount to the incipient stages of computer aided design. Saliency detection is a crucial application of medical image processing, and serves in its potential aid to medical practitioners by making the affected area stand out in the foreground from the rest of the background image. The algorithm developed here is a new approach to the detection of saliency in a three dimensional multi channel MR image sequence for the glioblastoma multiforme (a form of malignant brain tumour)...
2017: PloS One
Zhao Chen, Liqi Wang, Sikai Su, Xingyu Zheng, Nianyong Zhu, Cheuk-Lam Ho, Shuming Chen, Wai-Yeung Wong
Five deep blue carbene-based iridium(III) phosphors were synthesized and characterized. Interestingly, one of them can be fabricated into deep blue, sky blue and white organic light-emitting diodes (OLEDs) through changing the host materials and exciton blocking layers. These deep and sky blue devices exhibit Commission Internationale de l'Éclairage (CIE) coordinates of (0.145, 0.186) and (0.152, 0.277) with external quantum efficiency (EQE) of 15.2% and 9.6%, respectively. The EQE of the deep blue device can be further improved up to 19...
November 10, 2017: ACS Applied Materials & Interfaces
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