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Wenhan Xu, Gang Yang, Lan Jin, Jie Liu, Yunhe Zhang, Zhicheng Zhang, Zhenhua Jiang
Two sets of thermal stable nanocomposites were fabricated by using engineering plastics poly (ether sulfone) (PES) as a matrix and phthalocyanine molecules (CuPc) or hyperbranched phthalocyanine (HCuPc) coated barium titanate nanoparticles (BT) as filler for high electric field and high temperature dielectric applications. By side-by-side comparison, the hyperbranched coating is finely addressed for enhancing the dielectric response and breakdown strength of the composites. Specifically, BT-HCuPc/PES exhibits 40% lower dielectric loss and about 110% larger breakdown strength than BT-CuPc/PES...
March 15, 2018: ACS Applied Materials & Interfaces
Trevor A Hamlin, Marcel Swart, F Matthias Bickelhaupt
The reaction potential energy surface (PES) and, thus, the mechanism of bimolecular nucleophilic substitution (SN2) depend profoundly on the nature of the nucleophile and leaving group, but also on the central, electrophilic atom, its substituents, as well as on the medium in which the reaction takes place. Here, we provide an overview of recent studies and demonstrate how changes in any one of the aforementioned factors affect the SN2 mechanism. One of the most striking effects is the transition from a double-well to a single-well PES when the central atom is changed from a second-period (e...
March 15, 2018: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
Robert Noelken, Maximilian Moergel, Martin Kunkel, Wilfried Wagner
OBJECTIVES: As the 2-year results for immediately inserted and provisionalized implants have been reported, it remained an open issue, whether the initially high success rates and the esthetic outcome remain stable for longer observation periods. Therefore, this prospective study examines the 5-year hard and soft tissue changes at implants placed in the anterior maxilla. MATERIAL AND METHODS: Meanwhile, 37 microthreaded implants were placed in 21 patients into extraction sockets with and without facial bone deficiencies by a flapless approach...
March 2018: Clinical Oral Implants Research
Sang-Ho Lee, Heechul Choi, Kyoung-Woong Kim
To develop a novel granular adsorbent to remove arsenic and antimony from water, calcined Mg/Al-layered double-hydroxide (CLDH)-incorporated polyethersulfone (PES) granular adsorbents (PES-LDH) were prepared using a core-shell method having 25% PES in an N,N-dimethylformamide solution. The PES-LDH displayed a spherical hollow shape having a rough surface and the average particle size of 1-2 mm. On the PES-LDH surface, nanosized CLDH (100-150 nm) was successfully immobilized by consolidation between PES and CLDH...
March 13, 2018: Environmental Geochemistry and Health
Lee James Beever, Kirsty Giles, Richard Lawrence Meeson
OBJECTIVES:  To quantify and evaluate risks of complications attributable to external skeletal fixator (ESF) usage in dogs. METHODS:  A retrospective review of medical records following ESF placement. RESULTS:  Case records of 97 dogs were reviewed; fixator-associated complications occurred in 79/97 dogs. Region of ESF placement was significantly associated with complication development ( p  = 0.005), not complication type ( p  = 0...
February 2018: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
Michael Lucas, Aaron M Thomas, Ralf I Kaiser, Eugene K Bashkirov, Valeriy N Azyazov, Alexander Moiseevich Mebel
We explored the elementary reaction of atomic carbon (C;3 Pj ) with pyridine (C5 H5 N; X1 A1 ) at a collision energy of 34 ± 4 kJ mol-1 utilizing the crossed molecular beams technique. Forward-convolution fitting of the data was combined with high-level electronic structure calculations and statistical (RRKM) calculations on the triplet C6 H5 N potential energy surface (PES). These investigations reveal that the reaction dynamics are indirect and dominated by large range reactive impact parameters leading via barrier-less addition to the nitrogen atom and to two chemically non-equivalent 'aromatic' carbon-carbon bonds forming three distinct collision complexes...
March 12, 2018: Journal of Physical Chemistry. A
Robin Newhouse, Ha Do Byon, Emily Storkman Wolf, Meg Johantgen
PROBLEM: High-quality smoking cessation counseling guidelines for people who use tobacco are not fully integrated in acute-care services presenting missed opportunities to improve health outcomes. The role of the practice environment on enhancing or inhibiting guideline use is unknown. OBJECTIVE: To examine the relationship between the nurse practice environment and nurses' use of smoking cessation counseling practices, and to evaluate the effect of the individual nurse and organization characteristics on nurse smoking cessation counseling practices...
March 12, 2018: Worldviews on Evidence-based Nursing
Vahid Hoseinpour, Azadeh Ghaee, Vahid Vatanpour, Nasser Ghaemi
Sulphated carboxymethylcellulose (SCMC) was synthesized and characterized via FT-IR and CHNS analysis. The PES membranes were prepared and modified via surface amination with an aminolysis reaction and amount of amino groups was measured. The carboxymethylcellulose (CMC) and SCMC were immobilized on the surface of the aminated PES membranes (PES-NH2 ) via amide bonds to synthesize PES-CMC and PES-SCMC membranes, respectively, and the concentration of immobilized CMC and SCMC was determined. The unmodified PES, PES-CMC, and PES-SCMC membranes were characterized in terms of morphology, overall porosity, mean pore size, zeta potential, tensile strength, contact angle, protein adsorption and platelet adhesion...
May 15, 2018: Carbohydrate Polymers
Giulia Coarelli, Silvia Romano, Lorena Travaglini, Michela Ferraldeschi, Francesco Nicita, Maria Spadaro, Arianna Fornasiero, Marina Frontali, Marco Salvetti, Enrico Bertini, Giovanni Ristori
Hereditary spastic paraplegias (HSPs) are a heterogeneous group of neurological disorders characterized primarily by a pyramidal syndrome with lower limb spasticity, which can manifest as pure HSP or associated with a number of neurological or non-neurological signs (i.e., complicated HSPs). The clinical variability of HSPs is associated with a wide genetic heterogeneity, with more than eighty causative genes known. Recently, next generation sequencing (NGS) has allowed increasing genetic definition in such a heterogeneous group of disorders...
March 3, 2018: Clinical Neurology and Neurosurgery
Michael G Sorice, C Josh Donlan, Kevin J Boyle, Weibin Xu, Stefan Gelcich
Payments for ecosystem services programs have become common tools but most have failed to achieve wide-ranging conservation outcomes. The capacity for scale and impact increases when PES programs are designed through the lens of the potential participants, yet this has received little attention in research or practice. Our work with small-scale marine fisheries integrates the social science of PES programs and provides a framework for designing programs that focus a priori on scaling. In addition to payments, desirable non-monetary program attributes and ecological feedbacks attract a wider range of potential participants into PES programs, including those who have more negative attitudes and lower trust...
2018: PloS One
Yi Xie, Shengqiu Chen, Yihui Qian, Weifeng Zhao, Changsheng Zhao
In this paper, a photo-responsive bactericidal and bacteria-resistant membrane was successfully prepared via the integration of atom transfer radical polymerization (ATRP) and click chemistry. Azide-functionalized polycationic poly (N, N-dimethyl-N-(2-(methacryloyloxy)ethyl)-N-((2-nitrobenzyl)oxy)-2-oxoethanaminium bromide) (PDMAEMA-NBE) was synthesized by ATRP. Then, the PDMAEMA-NBE was clicked on alkynyl-functionalized polyethersulfone (PES) membrane surface, and proved by X-ray photoelectron spectrometer (XPS)...
March 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
Nili Steinberg, Myriam Stern, Shay Tenenbaum, Alexander Blankstein, Aviva Zeev, Itzhak Siev-Ner
This study aimed at evaluating whether the prevalence of knee injuries and morphological features are different among pre-and-post menarche dancers; Sixty-seven pre-and-post menarche dancers were screened for anthropometric parameters; knee laxity; patella femoral pain syndrome (PFPS), pathologies and anatomical structure of the knees. Both groups showed a high and similar prevalence of PFPS. The post-menarche dancers produced a significantly higher rate of Tanner stages 3-4 (p = .010), greater weight (p < ...
March 8, 2018: Research in Sports Medicine
Shanmuganathan Venkatesan, Elmer Surya Darlim, Ming-Hsiang Tsai, Hsisheng Teng, Yuh-Lang Lee
A graphene oxide sponge (GOS) is utilized the first time as a nanofiller (NF) in poly ethylene oxide (PEO) and poly vinylidene fluoride (PVDF)-based printable electrolytes (PEs) for quasi-solid state dye-sensitized solar cells (QS-DSSCs). The effects of the various concentrations of GOS NFs on the ion diffusivity and conductivity of electrolytes and the performance of the QS-DSSCs are studied. The results show that the presence of GOS NFs significantly increases the diffusivity and conductivity of the PEs. The introduction of 1...
March 8, 2018: ACS Applied Materials & Interfaces
Raji P Grewal, Kinsi Oberoi, Leema Reddy Peddareddygari
Charcot-Marie-Tooth disease type 4C, an autosomal recessive genetic neuropathy, is caused by mutations in the SH3TC2 (SH3 domain and tetratricopeptide repeats 2) gene. Interestingly, although mutations in this gene have been observed in European gypsies, a population that originated in India, there are few publications describing Indian patients. We report our analysis of a 50-year-old woman of Asian Indian descent with onset of progressive distal weakness and sensory loss in childhood. A clinical examination revealed the presence of a neuropathy with pes cavus without spinal abnormalities...
January 2018: Case Reports in Neurology
Yafu Guan, Shuo Yang, Donghui Zhang
Large number of energy points add great difficulty to construct reactive potential energy surfaces (PES). To alleviate this, exemplar-based clustering is applied to partition the configuration space into several smaller parts. The PES of each part can be constructed easily and the global PES is obtained by connecting all the PESs of small parts. This Divide and Conquer strategy is first demonstrated in the fitting of PES for OH3 with gaussian process regression (GPR) and further applied to construct PESs for CH5 and O+\CH4 with artificial neural networks (NN)...
March 7, 2018: Journal of Physical Chemistry. A
Matthias K Auer, Mareike R Stieg, Alexander Crispin, Caroline Sievers, Günter K Stalla, Anna Kopczak
BACKGROUND: Empty sella is the neuroradiological or pathological finding of an apparently empty sella turcica containing no pituitary tissue. The prevalence of primary empty sella, i.e., empty sella without any discernible cause, is not precisely known; estimates range from 2% to 20%. Technical advances in neuroradiology have made empty sella an increasingly common incidental finding. It remains unclear whether, and to what extent, asymptomatic adult patients with an incidentally discovered empty sella should undergo diagnostic testing for hormonal disturbances...
February 16, 2018: Deutsches Ärzteblatt International
Jayishni N Maharaj, Andrew G Cresswell, Glen A Lichtwark
PURPOSE: Foot orthoses maybe used in the management of musculoskeletal disorders related to abnormal subtalar joint (STJ) pronation. However, the precise mechanical benefits of foot orthoses for preventing injuries associated with the STJ are not well understood. The aim of this study was to investigate the immediate effect of foot orthoses on the energy absorption requirements of the STJ and subsequently tibialis posterior (TP) muscle function. METHODS: Eighteen asymptomatic subjects with a pes planus foot posture were prescribed custom-made foot orthoses made from a plaster cast impression...
March 5, 2018: Medicine and Science in Sports and Exercise
Adrien Soupart, Fabienne Alary, Jean-Louis Heully, Paul I P Elliott, Isabelle M Dixon
We have identified a new3 MC state bearing two elongated Ru-N bonds to the same ligand in [Ru(bpy)3 ]2+ . This DFT-optimized structure is a local minimum on the3 PES. This distal MC state (3 MCcis ) is destabilized by less than 2 kcal/mol with respect to the classical MC state (3 MCtrans ), and energy barriers to populate3 MCcis and3 MCtrans from the3 MLCT state are similar according to nudged elastic band minimum energy path calculations. Distortions in the classical3 MCtrans , that is, elongation of two Ru-N bonds toward two different bpy ligands, are not expected to favor the formation of ligand-loss photoproducts...
March 6, 2018: Inorganic Chemistry
Alessandra Mereu, Sara Frau, Alessandra Murgia, Alessandra Sotgiu, Alberto Lai, Federica Pisano, Fabio Marongiu, Igor Portoghese, Lucia Pinna, Elide Lepori, Pierangelo Origa, Antonio Azara, Paolo Castiglia, Maria Giuliana Solinas, Sabrina Porcheddu, Laura Saderi, Federico Argiolas, Stefano Murtas, Maria Giovanna Murru, Maria Rosa Faedda, Anna Maria Corriga, Noemi Maria Mereu, Laura Spada, Giuseppe Maria Sechi, Francesco Massa, Simona Accalai, Francesca Sanna, Caterina Bellu, Marcello Campagna, Silvia Prasciolu, Cinzia Aresu, Monica Pedron, Maria Anna Pes, Emanuela Pisone, Elisabetta Pezzi, Paolo Contu, Claudia Sardu
OBJECTIVES: to explore clinicians vision on hospital discharge records in order to identify useful elements to foster a more accurate compiling. DESIGN: qualitative research with phenomenological approach. SETTING AND PARTICIPANTS: participants were selected through purposive sampling among clinicians of two hospitals located in Sardinia; the sample included 76 people (32 medical directors and 44 doctors in training). MAIN OUTCOME MEASURES: identified codes for themes under investigation: vision of accurate compiling, difficulties, and proposals...
January 2018: Epidemiologia e Prevenzione
J-E Ducret, D Batani, G Boutoux, A Chancé, B Gastineau, J-C Guillard, F Harrault, K Jakubowska, I Lantuejoul-Thfoin, D Leboeuf, D Loiseau, A Lotode, C Pès, N Rabhi, A Saïd, A Semsoum, L Serani, B Thomas, J-C Toussaint, B Vauzour
The SEPAGE diagnostic will detect charged particles (electrons, protons, and ions) accelerated in the interaction of the PETAL (PETawatt Aquitaine Laser) laser with its targets on the LMJ (Laser MegaJoule)-PETAL laser facility. SEPAGE will be equipped with a proton-radiography front detector and two Thomson parabolas (TP), corresponding to different ranges of the particle energy spectra: Above 0.1 MeV for electrons and protons in the low-energy channel, with a separation capability between protons and12 C6+ up to 20 MeV proton energy and above 8 MeV for the high-energy channel, with a separation capability between protons and12 C6+ up to 200 MeV proton kinetic energy...
February 2018: Review of Scientific Instruments
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