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Daniel S Cook, Guy J Clarkson, Daniel M Dawson, Sharon E Ashbrook, Janet M Fisher, David Thompsett, David M Pickup, Alan V Chadwick, Richard I Walton
The rhodium(III) hydrogarnets Ca3 Rh2 (OH)12 and Sr3 Rh2 (OH)12 crystallize as polycrystalline powders under hydrothermal conditions at 200 °C from RhCl3 ·3H2 O and either Ca(OH)2 or Sr(OH)2 in either 12 M NaOH or KOH. Rietveld refinements against synchrotron powder X-ray diffraction (XRD) data allow the first crystal structures of the two materials to be determined. If BaO2 is used as a reagent and the concentration of hydroxide increased to hydroflux conditions (excess NaOH), then single crystals of a new complex rhodium hydroxide, BaNaRh(OH)6 , are formed in a phase-pure sample, with sodium included from the flux...
August 14, 2018: Inorganic Chemistry
Olga V Kazarina, Christophe Gourlaouen, Lydia Karmazin, Alexander G Morozov, Igor L Fedushkin, Samuel Dagorne
The present study first describes the reactivity of low valent Al(ii) and Ga(ii) complexes of the type (dpp-bian)M-M(dpp-bian) (1, M = Al; 2, Ga; dpp-bian2- = 1,2-bis-(2,6-iPr2-C6H3)-acenaphthenequinonediamido) with cyclic esters/carbonates such as ε-caprolactone (CL) and trimethylene carbonate (TMC). CL and TMC both readily coordinate to the Al(ii) species 1 to form the corresponding bis-adducts (dpp-bian)Al(L)-(L)Al(dpp-bian) (3, L = CL; 4, L = TMC), which were structurally characterized confirming that the Al(ii)-Al(ii) dimetallic backbone retains its integrity in the presence of such cyclic polar substrates...
August 14, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
Yifei Sun, Michele Kotiuga, Dawgen Lim, Badri Narayanan, Mathew Cherukara, Zhen Zhang, Yongqi Dong, Ronghui Kou, Cheng-Jun Sun, Qiyang Lu, Iradwikanari Waluyo, Adrian Hunt, Hidekazu Tanaka, Azusa N Hattori, Sampath Gamage, Yohannes Abate, Vilas G Pol, Hua Zhou, Subramanian K R S Sankaranarayanan, Bilge Yildiz, Karin M Rabe, Shriram Ramanathan
Solid-state ion shuttles are of broad interest in electrochemical devices, nonvolatile memory, neuromorphic computing, and biomimicry utilizing synthetic membranes. Traditional design approaches are primarily based on substitutional doping of dissimilar valent cations in a solid lattice, which has inherent limits on dopant concentration and thereby ionic conductivity. Here, we demonstrate perovskite nickelates as Li-ion shuttles with simultaneous suppression of electronic transport via Mott transition. Electrochemically lithiated SmNiO3 (Li-SNO) contains a large amount of mobile Li+ located in interstitial sites of the perovskite approaching one dopant ion per unit cell...
August 13, 2018: Proceedings of the National Academy of Sciences of the United States of America
(no author information available yet)
Arsenic decontamination of drinking water has grabbed significant attentions due to its serious effects on health. A novel gravel sand filter (GSF) holding zero-valent iron plates is designed and constructed in Muzaffargarh district (Pakistan) for arsenic removal from drinking water with lower iron concentration (0.3 ppm). The GSF efficiently removed arsenic up to 99.99% with long-term stability. GSF provides 800 litters arsenic-free drinking water in 39 hours with a rate of 2.5 L/h. Tentative mechanism for arsenic removal is evaluated and described on the basis of oxidation-coagulation-adsorption processes...
August 13, 2018: Water Environment Research: a Research Publication of the Water Environment Federation
Nayara B da Silva, Naomi S Taus, Wendell C Johnson, Anabela Mira, Leonhard Schnittger, Jessica D M Valente, Odilon Vidotto, Hayley E Masterson, Thállitha S W J Vieira, Massaro W Ueti, Rafael F C Vieira
Anaplasma marginale, the causative agent of bovine anaplasmosis, is a tick-borne bacterium that causes significant economic losses for cattle industries and is increasingly being detected in other animal species. Rhipicephalus microplus is the main vector of this bacterium and may be found parasitizing small ruminants. In northeastern Brazil, multispecies grazing is a common family subsistence practice on smallholder farms possibly facilitating interspecies transmission of pathogens. Considering that A. marginale infection has been previously molecularly described in sheep, this study has aimed to estimate the prevalence of A...
2018: PloS One
Dimitrios Chanouzas, Michael Sagmeister, Sian Faustini, Peter Nightingale, Alex Richter, Charles J Ferro, Matthew David Morgan, Paul Moss, Lorraine Harper
Background: Infection is the leading cause of death in ANCA-associated vasculitis (AAV). Expansion of CD4+CD28null T-cells is associated with increased risk of infection and mortality, but is only present in cytomegalovirus-seropositive individuals. We hypothesised that subclinical cytomegalovirus reactivation drives CD4+CD28null T-cell expansion; that this is associated with impaired immune response to heterologous antigens, and that anti-viral therapy may ameliorate this. Methods: In a proof-of-concept open-label clinical trial, 38 cytomegalovirus-seropositive AAV patients were randomised to receive valaciclovir for 6-months or no intervention...
August 9, 2018: Journal of Infectious Diseases
Malte Sachs, Kirsten Bohnen, Mathhias Conrad, Benedikt P Klein, Claudio K Krug, Clemens Pietzonka, Martin Schmid, Steffen Zörb, Michael Gottfried, Bernd Harbrecht
1T-CuxTa1-xS2 belongs to the group of layered transition metal dichalcogenides. We investigated this compound with respect to its synthesis, homogeneity range, structure and electronic properties. 1T-CuxTa1-xS2 readily decomposes at elevated temperatures and can only be prepared and stabilized by a sufficiently high amount of sulfur excess. XPS and NEXAFS measurements reveal that copper has the oxidation state +I in 1T-CuxTa1-xS2, which is supported by quantum chemical calculations. The average structure of 1T-CuxTa1-xS2 resembles that of the high-temperature phase of 1T-TaS2 in which tantalum is partially substituted by copper...
August 13, 2018: Journal of Physics. Condensed Matter: An Institute of Physics Journal
Ahmed Hamdy, Mohamed K Mostafa, Mahmoud Nasr
Nanoscale zero-valent iron (nZVI) particles were investigated for the removal of methylene blue (MB) from aqueous solutions and the treatment of textile industry effluents. The nZVI material was characterized by XRD, TEM, EDS, FTIR, and SEM. It was demonstrated that several functional groups such as C-H, C = C, C-C, and C-O contributed to MB reduction. At initial MB concentration of 70 mg/L, the optimum pH was 6, achieving a removal efficiency of 72.1% using an nZVI dosage of 10 g/L, stirring rate of 150 rpm, and temperature of 30 °C within 30 min...
August 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Mani Balamurugan, Natarajan Saravanan, Heonjin Ha, Yoon Ho Lee, Ki Tae Nam
Manganese plays multiple role in many biological redox reactions in which it exists in different oxidation states from Mn(II) to Mn(IV). Among them the high-valent manganese-oxo intermediate plays important role in the activity of certain enzymes and lessons from the natural system provide inspiration for new developments of artificial systems for a sustainable energy supply and various organic conversions. This review describes recent advances and key lessons learned from the nature on high-valent Mn-oxo intermediates...
2018: Nano Convergence
Yi-Ting Chiu, Pei-Yu Lee, Thomas Wi-Afedzi, Jechan Lee, Kun-Yi Andrew Lin
While zero valent aluminum (ZVAl) is a promising reductant for eliminating bromate from water, ZVAl is typically obtained from reagent grade aluminum. As used aluminum beverage can is the most common aluminum waste, it can be conveniently used to prepare ZVAl. Thus, in this study aluminum beverage cans are employed for the first time as a plentiful and easily accessible aluminum source to afford ZVAl for eliminating bromate from water. As aluminum is easily oxidized to form aluminum oxide, aluminum can pieces (ACPs) are pre-treated with HCl for removing the oxide layer to afford ZVAl...
July 26, 2018: Journal of Colloid and Interface Science
Nancy Russell, Susan Jennings, Blair Jennings, Valerie Slee, Lisa Sterling, Mariana Castells, Peter Valent, Cem Akin
BACKGROUND: Mast cell diseases such as mastocytosis and mast cell activation syndrome involve abnormal proliferation and/or activation of these cells leading to many clinically relevant symptoms. OBJECTIVE: In order to determine the characteristics and experiences of people known or suspected to have a mast cell disorder, The Mastocytosis Society, a US based patient advocacy, research and education organization, conducted a survey of patients. METHODS: This web-based survey was publicized through specialty clinics and the Society's newsletter, Web site and online blogs...
August 8, 2018: Journal of Allergy and Clinical Immunology in Practice
Giovanna Grimaldi, Giuliana Catara, Carmen Valente, Daniela Corda
ADP-ribosylation is a post-translational modification of proteins that has required the development of specific technical approaches for the full definition of its physiological roles and regulation. The identification of the enzymes and specific substrates of this reaction is an instrumental step toward these aims. Here we describe a method for the separation of ADP-ribosylated proteins based on the use of the ADP-ribose-binding macro domain of the thermophilic protein Af1521, coupled to mass spectrometry analysis for protein identification...
2018: Methods in Molecular Biology
L Marsicano, M Battaglieri, M Bondí, C D R Carvajal, A Celentano, M De Napoli, R De Vita, E Nardi, M Raggi, P Valente
A novel mechanism to produce and detect light dark matter in experiments making use of GeV electrons (and positrons) impinging on a thick target (beam dump) is proposed. The positron-rich environment produced by the electromagnetic shower allows us to produce an A^{'} via nonresonant (e^{+}+e^{-}→γ+A^{'}) and resonant (e^{+}+e^{-}→A^{'}) annihilation on atomic electrons. The latter mechanism, for some selected kinematics, results in a larger sensitivity with respect to limits derived by the commonly used A^{'}-strahlung...
July 27, 2018: Physical Review Letters
Ashley E Skeith, Amy M Valent, Nicole E Marshall, Leonardo M Pereira, Aaron B Caughey
OBJECTIVE: To examine the association of a quality improvement effort that was mediated through weekly review of all criteria for cesarean delivery on cesarean delivery prevalence and indications. METHODS: We conducted a retrospective cohort study using a natural experiment model that compared two timeframes, from 2009 to 2013, at a single institution. We introduced a weekly retrospective review conference to discuss all cesarean deliveries in 2010 that continued over time...
August 6, 2018: Obstetrics and Gynecology
Ponnusamy Senthil Kumar, Akshaya S Nair, Ananya Ramaswamy, Anbalagan Saravanan
The present research is focused on the removal of Zn(II) ions from aqueous solution using nano zero-valent iron impregnated cashew nut shell (NZVI-CNS). The present system was investigated in batch mode operation. NZVI-CNS was prepared by the liquid-phase reduction process. The results showed that the NZVI-CNS exhibited superior adsorption capacity for the removal of Zn(II) ions. Adsorption isotherm and kinetic models were applied to explain the nature of the adsorption process. Adsorption kinetic data followed the pseudo-first order kinetic model...
August 2018: IET Nanobiotechnology
Andreia S P Sousa, Isabel Valente, Ana Pinto, Tiago Soutelo, Márcia Silva
CONTEXT:   The determinant role of medium latency responses (MLRs) during compensatory postural adjustments in postural stability and the lack of clarity about the mechanisms behind chronic ankle instability (CAI) sustain the hypothesis that these postural responses are impaired under this condition. However, to the best of our knowledge, no authors have assessed MLRs in patients with CAI; most of the research regarding compensatory postural adjustments has been directed at the timing of short latency responses (SLRs)...
August 10, 2018: Journal of Athletic Training
Michele Maio, Maria Fortunata Lofiego, Carolina Fazio, Sara Cannito, Carla Chiarucci, Gianluca Giacobini, Monica Valente, Patrizia Tunici, Alessia Covre, Vincenzo Russo
No abstract text is available yet for this article.
August 9, 2018: Cancer Immunology, Immunotherapy: CII
Kelsey E Larson, Stephanie A Valente, Chao Tu, Jarrod Dalton, Stephen R Grobmyer
BACKGROUND: Sentinel lymph node biopsy is the gold standard for axillary staging in early-stage, clinically node-negative breast cancer, so it is paramount that this operation be both precise and accurate, because excessive sentinel lymph node removal increases morbidity, whereas understaging risks inadequate treatment. The goal of this study was to assess surgeon variation in the number of sentinel lymph nodes removed and the oncologic yield of sentinel lymph node biopsy for breast cancer...
August 6, 2018: Surgery
Marco Del Chiaro, Elena Rangelova, Asif Halimi, Zeeshan Ateeb, Chiara Scandavini, Roberto Valente, Ralf Segersvärd, Urban Arnelo, Caroline S Verbeke
BACKGROUND: Few studies have investigated the outcome of pancreatectomy associated with artery resection (PAR). METHODS: Retrospective analysis of a cohort of operated borderline or locally advanced pancreatic cancer patients with surgically confirmed arterial involvement. Short and long-term outcome were analyzed and compared in patients who underwent PAR (Group 1) and palliative surgery (Group 2). RESULTS: Of 73 patients who underwent surgical exploration with intent of resection, 34 underwent PAR (±venous resection) (Group 1) and 39 underwent palliation (Group 2)...
August 6, 2018: HPB: the Official Journal of the International Hepato Pancreato Biliary Association
Ricardo J R Matos, Catarina I P Chaparro, Jorge C Silva, Manuel Almeida Valente, João Paulo Borges, Paula I P Soares
In the present work composite membranes were produced by combining magnetic nanoparticles (NPs) with cellulose acetate (CA) membranes for magnetic hyperthermia applications. The non-woven CA membranes were produced by electrospinning technique, and magnetic NPs were incorporated by adsorption at fibers surface or by addition to the electrospinning solution. Therefore, different designs of composite membranes were obtained. Superparamagnetic NPs synthesized by chemical precipitation were stabilized either with oleic acid (OA) or dimercaptosuccinic acid (DMSA) to obtain stable suspensions at physiological pH...
October 15, 2018: Carbohydrate Polymers
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