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Prabhakarn Arunachalam, Maged N Shaddad, Mohamed A Ghanem, Abdullah M Al-Mayouf, Mark T Weller
Photoanodes fabricated by the electrophoretic deposition of a thermally prepared zinc tantalum oxynitride (ZnTaO₂N) catalyst onto indium tin oxide (ITO) substrates show photoactivation for the oxygen evolution reaction (OER) in alkaline solutions. The photoactivity of the OER is further boosted by the photodeposition of cobalt phosphate (CoPi) layers onto the surface of the ZnTaO₂N photoanodes. Structural, morphological, and photoelectrochemical (PEC) properties of the modified ZnTaO₂N photoanodes are studied using X-ray diffraction (XRD), scanning electron microscopy (SEM), ultraviolet visible (UV-Vis) diffuse reflectance spectroscopy, and electrochemical techniques...
January 18, 2018: Nanomaterials
Elisabeth M H Mathus-Vliegen, Karin van der Vliet, Inge J Wignand-van der Storm, John S Stadwijk
BACKGROUND: Because of its volume, adequate bowel preparation remains problematic in physically unfit patients. OBJECTIVE: This study aimed to compare a small-volume sodium picosulfate/magnesium citrate preparation with a 2-L ascorbic acid-enriched polyethylene glycol solution plus bisacodyl. DESIGN: This study has a noninferiority design, assuming that ascorbic acid-enriched polyethylene glycol solution plus bisacodyl is 70% efficacious in achieving an Ottawa score ≤7 and accepting a difference in success rate of <15% with a target enrollment of 146 patients per group...
February 2018: Diseases of the Colon and Rectum
Alexander M Khenkin, Madhu Vedichi, Linda J W Shimon, Matthew A Cranswick, Johannes E M N Klein, Lawrence Que, Ronny Neumann
The iron(II) triflate complex (1) of 1,2-bis(2,2'-bipyridyl-6-yl)ethane, with two bipyridine moieties connected by an ethane bridge, was prepared. Addition of aqueous 30% H2O2 to an acetonitrile solution of 1 yielded 2, a green compound with λmax=710 nm. Moessbauer measurements on 2 showed a doublet with an isomer shift (δ) of 0.35 mm/s and a quadrupole splitting (ΔEQ) of 0.86 mm/s, indicative of an antiferromagnetically coupled diferric complex. Resonance Raman spectra showed peaks at 883, 556 and 451 cm-1 that downshifted to 832, 540 and 441 cm-1 when 1 was treated with H218O2...
November 2017: Israel Journal of Chemistry
Huang Wen, Hua Li, Suisui He, Fengjuan Chen, Erli Ding, Sha Liu, Baodui Wang, Yong Peng
Although substantial efforts have been made toward the synthesis of noble metal-semiconductor heteronanostructures, direct in situ synthesis of two-dimensional (2D) core-shell semiconductor@noble metal heterostructured nanosheets remains largely unexplored. Herein, we report the synthesis of a novel 2D core-shell CuFeSe2@Au heterostructured nanosheet with an amorphous core and a crystalline shell based on the reversed growth of Au nanosheets on the CuFeSe2 frameworks under near-infrared (NIR) illumination. The nanosheet exhibits strong absorbance in the NIR region, and the valence band top of CuFeSe2@Au nanosheets is higher than the oxidation potential of O2/H2O...
January 15, 2018: Nanoscale
Takahiro Inatomi, Yuji Koga, Kouki Matsubara
In typical catalytic organic transformations, transition metals in catalytically active complexes are present in their most stable valence states, such as palladium(0) and (II). However, some dimeric monovalent metal complexes can be stabilized by auxiliary ligands to form diamagnetic compounds with metal-metal bonding interactions. These diamagnetic compounds can act as catalysts while retaining their dimeric forms, split homolytically or heterolytically into monomeric forms, which usually have high activity, or in contrast, become completely deactivated as catalysts...
January 11, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Shane S Galley, Alexandra A Arico, Tsung-Han Lee, Xiaoyu Deng, Yong-Xin Yao, Joseph M Sperling, Vanessa Proust, Julia S Storbeck, Vladimir Dobrosavljevic, Jennifer N Neu, Theo Siegrist, Ryan E Baumbach, Thomas E Albrecht-Schmitt, Nikolas Kaltsoyannis, Nicola Lanata
A series of f-block chromates, CsM(CrO4)2 (M = La, Pr, Nd, Sm, Eu; Am), were prepared revealing notable differences between the AmIII derivatives and their lanthanide analogs. While all compounds form similar layered structures, the americium compound exhibits polymorphism and adopts both a structure isomorphous with the early lanthanides as well as one that possesses lower symmetry. Both polymorphs are dark red and possess band gaps that are smaller than the LnIII compounds. In order to probe the origin of these differences, the electronic structure of  CsSm(CrO4)2,  CsEu(CrO4)2and  CsAm(CrO4)2 were studied using both a molecular cluster approach featuring hybrid density functional theory and QTAIM analysis, and by the periodic LDA+GA and LDA+DMFT methods...
January 10, 2018: Journal of the American Chemical Society
Ranjith Bose, Vasanth Rajendiran Jothi, Beomsoo Koh, Chiyoung Jung, Sung Chul Yi
Electrocatalytic splitting of water is the most convincing and straight forward path to extract hydrogen, but the efficiency of this process relies heavily on the catalyst employed. Here, molybdenum sulphoselenophosphide (MoS45.1 Se11.7 P6.1 ) spheroids are reported as an active catalyst for the hydrogen evolution reaction (HER) and this is the first attempt to study on ternary anion based molybdenum chalcogenides. As-prepared MoSx Sey Pz catalyst reveals a unique morphology of microspheroids capped by stretched-out nanoflakes that exhibits excellent electrocatalytic activity (   j-10 mA cm-2 @ 93 mV, Tafel slope of 50...
January 10, 2018: Small
Sarah K Argyropoulos, S Kashif Mahmood, Emily J Campbell, James M Richter
BACKGROUND: Hospitalized patients completing bowel preparation for colonoscopy typically have preparations of poorer quality when compared to outpatient populations. AIMS: Our study aimed to evaluate the effectiveness of a performance improvement program in improving colonoscopy preparation for an inpatient population. METHODS: We identified a cohort of adult patients (n = 641) undergoing an inpatient colonoscopy during a 12-month period at an academic medical center and compared a multifactor intervention group to a historical baseline group...
January 4, 2018: Digestive Diseases and Sciences
M Praveen, G Aarthi, P K Meenapriya, S Senthil Kumar, N S Mohan Kumar, J V Karunakaran
Aim: This study aims to compare the smear layer removal efficacy of 2% chitosan (low molecular weight) (C-LMV), 4% chitosan citrate (CC), and 10% citric acid (CA) when used in specific irrigant protocols. Materials and Methods: A total of 60 single-rooted maxillary incisors and canines were decoronated, standardized to a root length of 15 mm, and prepared with rotary files up to protaper F3 size. Sodium hypochlorite was used as initial rinse [8 ml]. The samples were divided into experimental (Group III, IV, V, and VI) (n = 10) and control groups (I - 17% EDTA, II - normal saline) (n = 5) based on the type of final rinse solution (5 ml) used, that is, 2% C-LMV, 4% C-citrate, 10% CA, and 1% acetic acid...
November 2017: Journal of Pharmacy & Bioallied Sciences
Katharina Fetz, Ursula Wenzel-Meyburg, Christian Schulz-Quach
BACKGROUND: The evaluation of the effectiveness of undergraduate palliative care education (UPCE) programs is an essential foundation to providing high-quality UPCE programs. Therefore, the implementation of valid evaluation tools is indispensable. Until today, there has been no general consensus regarding concrete outcome parameters and their accurate measurement. The Program in Palliative Care Education and Practice Questionnaire (German Revised Version; PCEP-GR) is a promising assessment tool for UPCE...
December 28, 2017: BMC Palliative Care
Balakumar Vellaichamy, Prakash Periakaruppan, Ramya Arumugam, Kathiresan Sellamuthu, Bhuvana Nagulan
A new mesoporous metal-free functionalized multi-walled carbon nanotube (f-MWCNT) covalently grafted polypyrrole (PPy) nanocomposite has been synthesized via chemical oxidative polymerization method keeping different weight ratio of f-MWCNT (1-4). Various instrumentation techniques such as UV-DRS, FT-IR, XRD, Raman, TGA, BET and TEM were used to characterize the as-prepared nanocomposite. The successfully constructed photocatalytically active mesoporous metal-free PPy grafted MWCNT nanocomposite was employed for the decontamination of nitrobenzene (NB)...
December 18, 2017: Journal of Colloid and Interface Science
Baochen Wang, Yan-Gai Liu, Zhaohui Huang, Minghao Fang, Xiaowen Wu
Discovery of novel phosphors is one of the main issues for improving the color rendering index (CRI) and correlated color temperature (CCT) of white light-emitting diodes (w-LEDs). This study mainly presents a systematic research on the synthesis, crystal structure variation and photoluminescence tuning of novel (oxy)nitride solid solution Ca3Si3-x O3+x N4-2x : Eu2+ phosphors. XRD refinements show that lattice distortion occurs when x value diverges the optimum one (x = 1). The lattice distortion causes a widening of emission spectrum and an increase of Stokes shift (ΔSS), which leads to a bigger thermal quenching...
December 22, 2017: Scientific Reports
Xin Zhao, Zhong Chen
Nanostructures exhibit numerous merits to improve the efficiency in solar-to-energy conversion. These include shortened carrier collection pathways, an increased volume ratio between depletion layer and bulk, enhanced light capture due to multiple light scattering in nanostructures, and a high surface area for photochemical conversion reactions. In this study, we describe the synthesis of morphology-controlled W-doped BiVO4 by simply tuning the solvent ratio in precursor solutions. Planar and porous W-doped BiVO4 thin films were prepared and compared...
2017: Beilstein Journal of Nanotechnology
Alexandra A P Mansur, Herman S Mansur, Sandhra M Carvalho, Anderson J Caires
Cancer research has experienced astonishing advances recently, but cancer remains a major threat because it is one of the leading causes of death worldwide. Glioblastoma (GBM) is the most malignant brain tumor, where the early diagnosis is vital for longer survival. Thus, this study reports the synthesis of novel water-dispersible ternary AgInS2 (AIS) and quaternary AgInS2-ZnS (ZAIS) fluorescent quantum dots using carboxymethylcellulose (CMC) as ligand for multiplexed bioimaging of malignant glioma cells (U-87 MG)...
2017: Contrast Media & Molecular Imaging
B Balamurugan, S K Ghosh, S A Lone, J K Prasad, G K Das, R Katiyar, Abdul Rahman Mustapha, Ajay Kumar, M R Verma
The present study was designed to investigate the effect of partial deoxygenation of extender on sperm quality, lipid peroxidation (LPO) and reactive oxygen species (ROS) in buffalo (Bubalus bubalis) during cryopreservation of semen. Semen extender was prepared freshly and split into three sub-extenders [Extender I: control (non-deoxygenated), Extender II (partially deoxygenated by using LN2 flushing) and Extender III (partially deoxygenated mechanically by vacuum pump)]. Amounts of dissolved oxygen (DO) were determined in all the three extenders and also in post-thaw semen...
December 16, 2017: Animal Reproduction Science
Muhammad Altaf, Manzar Sohail, Muhammad Mansha, Naseer Iqbal, Muhammad Sher, Atif Fazal, Nisar Ullah, Anverhusein A Isab
Metal-organic frameworks (MOFs) represent modern class of porous materials, which can be assembled in modular manner using different metal ions and organic linkers. Due to tunable structural properties, these materials are found to be useful for gas storage and separation technologies as well as catalytic applications. Herein we report the preparation of cost-effective zinc-based MOF ([Zn(bpcda)(bdc)]n) using N,N'-bis(pyridin-4-ylmethylene)cyclohexane-1,4-diamine, and benzene dicarboxylic acid linkers. Noteworthy, this new material exhibits remarkable photoelectrochemical (PEC) catalytic activity in water splitting for the evolution of oxygen...
December 18, 2017: ChemSusChem
Franz Uiblein, Tuan Anh Hoang, Daniel Gledhill
For Jansen's goatfish, Parupeneus jansenii (Mullidae), taxonomic knowledge has been rather poor and occurrence information restricted to a few localities only, with verified records from northern Sulawesi and Sunda Street (Indonesia), and Luzon (Philippines). This species is here included in the so-called "heptacanthus" group together with the Indo-Pacific cinnabar goatfish, P. heptacanthus, and five Indian Ocean congenerics, based on an evenly, symmetrically rounded posterior maxilla margin and similarities in meristic characters and preserved colour...
November 8, 2017: Zootaxa
Sarah J Nevitt, Maria Sudell, Jennifer Weston, Catrin Tudur Smith, Anthony G Marson
BACKGROUND: Epilepsy is a common neurological condition with a worldwide prevalence of around 1%. Approximately 60% to 70% of people with epilepsy will achieve a longer-term remission from seizures, and most achieve that remission shortly after starting antiepileptic drug treatment. Most people with epilepsy are treated with a single antiepileptic drug (monotherapy) and current guidelines from the National Institute for Health and Care Excellence (NICE) in the United Kingdom for adults and children recommend carbamazepine or lamotrigine as first-line treatment for partial onset seizures and sodium valproate for generalised onset seizures; however a range of other antiepileptic drug (AED) treatments are available, and evidence is needed regarding their comparative effectiveness in order to inform treatment choices...
December 15, 2017: Cochrane Database of Systematic Reviews
Li Wang, Brandon S Sprung, Arthur J DeCross, Danielle Marino
BACKGROUND AND AIMS: Split-dose bowel preparation is associated with improved mucosal visualization and patient tolerance, becoming a standard of care. However, quality measures data associated with this preparation are limited. At our academic tertiary-care facility, we aim to study the effect of changing from single- to split-dose preparation on colonoscopy quality measures. METHODS: A retrospective cohort study with quality indicators was conducted using electronic medical record data...
December 14, 2017: Digestive Diseases and Sciences
Saad M Alshehri, Ameen N Alhabarah, Jahangeer Ahmed, Mu Naushad, Tansir Ahamad
The development of efficient, cost-effective and long-lived electro-catalyst is necessary for the realization of practically viable water-splitting systems. A trifunctional electrocatalyst for water splitting (hydrogen evolution, oxygen reduction and oxygen evolution reaction, HER/ORR/OER) was designed via eco-friendly and facial way. CoFe2O4 nanoparticles embedded in nitrogen doped mesoporous carbon were prepared using chicken egg white/albumin after pyrolysis at different temperatures, 700, 800, 900 and 1000 °C...
December 6, 2017: Journal of Colloid and Interface Science
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