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Chau-Ren Jung, Bing-Fang Hwang, Wei-Ting Chen
Satellite-based aerosol optical depth (AOD) is now comprehensively applied to estimate ground-level concentrations of fine particulate matter (PM2.5). This study aimed to construct the AOD-PM2.5 estimation models over Taiwan. The AOD-PM2.5 modeling in Taiwan island is challenging owing to heterogeneous land use, complex topography, and humid tropical to subtropical climate conditions with frequent cloud cover and prolonged rainy season. The AOD retrievals from the MODerate resolution Imaging Spectroradiometer (MODIS) onboard the Terra and Aqua satellites were combined with the meteorological variables from reanalysis data and high resolution localized land use variables to estimate PM2...
November 17, 2017: Environmental Pollution
Michel Van Wassenhoven, Martine Goyens, Marc Henry, Etienne Capieaux, Philippe Devos
BACKGROUND: NMR proton relaxation is sensitive to the dynamics of the water molecule H2O, through the interaction of the spin of the proton ((1)H) with external magnetic and electromagnetic fields. METHODS: We measured dilution and potentization processes through measurements of (1)H spin-lattice T1 and spin-spin T2 relaxation times. In order to interpret the recorded fluctuations in T1- or T2-values, experimental data were linearized by investigating how the area under a fluctuating time = f(dilution) curve (dilution integral or DI) changes with dilution...
November 2017: Homeopathy: the Journal of the Faculty of Homeopathy
Atsuya Koizumi, Takuya Hasegawa, Atsushi Itadani, Kenji Toda, Taoyun Zhu, Mineo Sato
In the title complex, di-aqua-(1H-imidazole-κN(3))(nitrato-κ(2)O,O')bis-(4-oxo-pent-2-en-2-olato-κ(2)O,O')lanthanum(III), [La(C5H7O2)2(NO3)(C3H4N2)(H2O)2], the La atom is coordinated by eight O atoms of two acetyl-acetonate (acac) anions acting as bidentate ligands, two water mol-ecule as monodentate ligands, one nitrate anions as a bidentate ligand and one N atom of an imidazolate (ImH) molecule as a monodentate ligand. Thus, the coordination number of the La atom is nine in a monocapped square anti-prismatic polyhedron...
November 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
Sergey N Britvin, Andrey M Rumyantsev
The structure of a salt of diprotonated endo-3-amino-tropane crystallized with a copper(II) anionic cluster is reported, viz. (C8H18N2)[CuCl3(NO3)(H2O)]. Neither ion in the salt has been structurally characterized previously. In the crystal, the ions pack together to form a three-dimensional structure held together by a network of inter-molecular N-H⋯O, O-H⋯Cl and N-H⋯Cl hydrogen-bonding inter-actions. Selective crystallization of the title compound can be considered as a simple method for the separation of the exo and endo isomers of 3-amino-tropane...
November 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
Ugochukwu Okeke, Yilma Gultneh, Ray J Butcher
The title compound, [Cu2(ClO4)(C14H13N2O)2(H2O)]ClO4, crystallizes as an unsymmetrical dinuclear cation bridged by the phen-oxy O atoms with one Cu(II) atom coordinated by a water mol-ecule and the other by a perchlorate anion, thus making both Cu(II) atoms five-coordinate, and with a further perchlorate anion present for charge balance. A long inter-action [2.9893 (5) Å] between one of the two Cu(II) atoms and an O atom of the perchlorate counter-ion links the cations and anions into linear chains along the a-axis direction...
November 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
Matimon Sangsawang, Kittipong Chainok, Nanthawat Wannarit
The title compound, [CdNa2(C8H4O4)2(C3H7NO)(H2O)2] n or [CdNa2(1,3-bdc)2(DMF)(H2O)2] n , is a new Cd(II)-Na(I) heterobimetallic coordination polymer. The asymmetric unit consists of one Cd(II) atom, two Na(I) atoms, two 1,3-bdc ligands, two coordinated water mol-ecules and one coordinated DMF mol-ecule. The Cd(II) atom exhibits a seven-coordinate geometry, while the Na(I) atoms can be considered to be penta-coordinate. The metal ions and their symmetry-related equivalents are connected via chelating-bridging carboxyl-ate groups of the 1,3-bdc ligands to generate a three-dimensional framework...
November 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
Robert Mans, Else-Jasmijn Hassing, Melanie Wijsman, Annabel Giezekamp, Jack T Pronk, Jean-Marc Daran, Antonius J A van Maris
CRISPR/Cas9-based genome editing allows rapid, simultaneous modification of multiple genetic loci in Saccharomyces cerevisiae. Here, this technique was used in a functional analysis study aimed at identifying the hitherto unknown mechanism of lactate export in this yeast. First, an S. cerevisiae strain was constructed with deletions in 25 genes encoding transport proteins, including the complete aqua(glycero)porin family and all known carboxylic-acid transporters. The 25-deletion strain was then transformed with an expression cassette for Lactobacillus casei lactate dehydrogenase (LcLDH)...
November 14, 2017: FEMS Yeast Research
Corinna Földi, Simon Sauermann, Reiner Dohrmann, Tim Mansfeldt
Vehicular emissions have become one of the main source of pollution of urban soils; this highlights the need for more detailed research on various traffic-related emissions and related distribution patterns. Since the banning of asbestos in the European Union, its substitution with antimony (Sb) in brake linings has led to increased inputs of this toxic metalloid to environmental compartments. The objective of this study was to provide detailed information about the spatial distribution patterns of Sb and to assess its mobility and bioavailability...
November 9, 2017: Environmental Pollution
Brandon Michael Henry, Agata Marcinów, Przemysław Pękala, Dominik Taterra, Marios Loukas, R Shane Tubss, Jerzy A Walocha, Krzysztof A Tomaszewski
Recently, an improvement of the quality of reporting and methodology in original research has been observed. Major fields in research have introduced checklists aimed at promoting clear and univocal reporting of methods and results. The basis of evidence-based medicine (EBM) lies in transparent reporting of primary studies. Although clinical research progressed rapidly into evidence-based guidelines, the basic sciences, including anatomy, just recently started to use the rules of EBM. No anatomy-specific standardized research checklist has been introduced so far...
2017: Folia Medica Cracoviensia
Eon Kim, Mou Saha, Klaus Ehrmann
OBJECTIVES: To evaluate the mechanical properties of commonly available soft contact lens materials and compare results using custom-built MicroTensometer. METHODS: The Young modulus, parameters for stress relaxation, and toughness of 18 types of single vision soft contact lenses were measured using custom-built MicroTensometer. Five lenses of each type were soaked in standard phosphate buffered saline and measured at a temperature of 35°C. Each lens was flattened and sliced into a rectangular strip sample using two parallel blades...
November 7, 2017: Eye & Contact Lens
Thomas David, Kailang Liu, Antoine Ronda, Luc Favre, Marco Abbarchi, Marc Gailhanou, Pascal Gentile, Denis Buttard, Vincent Calvo, Michele Amato, Jean-Noël Aqua, Isabelle Berbezier
Selective oxidation of the silicon element of silicon germanium (SiGe) alloys during thermal oxidation is a very important and technologically relevant mechanism used to fabricate a variety of microelectronic devices. We develop here a simple integrative approach involving vapor-liquid-solid (VLS) growth followed by selective oxidation steps to the construction of core-shell nanowires and higher-level ordered systems with scalable configurations. We examine the selective oxidation/condensation process under nonequilibrium conditions that gives rise to spontaneous formation of core-shell structures by germanium condensation...
November 14, 2017: Nano Letters
Yafei Wang, Hong Su, Xin Song, Samuel Selorm Fiati Kenston, Jinshun Zhao, Yuanliang Gu
With the rapid economic development in recent years, China is facing a great challenge due to heavy metal pollution. The heavy metals may enter the human body through ingestion of aqua products to cause great health risks. In the present study, the inhibitory effects of luteolin on the combined toxicity of multi-heavy metals (including zinc, manganese, lead, copper, cadmium, mercury, chromium and nickel) were investigated in HL7702 hepatocyte cells. An MTT assay demonstrated that 20 µM luteolin significantly alleviated the multi-heavy metal mixture-induced cell death and morphological changes...
October 27, 2017: International Journal of Molecular Medicine
Dharmalingam Sivanesan, Min Hye Youn, Ki Tae Park, Hak Joo Kim, Andrews Nirmala Grace, Soon Kwan Jeong
The crystal structures of mono- and dinuclear Cu(II) trifluoromethanesulfonate (triflate) complexes with benzyldipicolylamine (BDPA) are described. From equimolar amounts of Cu(triflate)2 and BDPA, a water-bound Cu(II) mononuclear complex, aqua(benzyldipicolylamine-κ(3)N,N',N'')bis(trifluoromethanesulfonato-κO)copper(II) tetrahydrofuran monosolvate, [Cu(CF3SO3)2(C19H19N3)(H2O)]·C4H8O, (I), and a triflate-bridged Cu(II) dinuclear complex, bis(μ-trifluoromethanesulfonato-κ(2)O:O')bis[(benzyldipicolylamine-κ(3)N,N',N'')(trifluoromethanesulfonato-κO)copper(II)], [Cu2(CF3SO3)4(C19H19N3)2], were synthesized...
November 1, 2017: Acta Crystallographica. Section C, Structural Chemistry
Graham Smith
The structures of the sodium, potassium and rubidium complex salts of (4-fluorophenoxy)acetic acid (PFPA), namely poly[μ-aqua-aqua-μ-[2-(4-fluorophenoxy)acetato]-κ(3)O(1),O(2):O(1')-sodium], [Na(C8H6FO3)(H2O)2]n, (I), and isotypic poly[μ5-[2-(4-fluorophenoxy)acetato]-κ(5)O(1),O(2):O(1),O(1'):O(1'):O(1'):O(1')-potassium], [K(C8H6FO3)]n, (II), and poly[μ5-[2-(4-fluorophenoxy)acetato]-κ(5)O(1),O(2):O(1),O(1'):O(1'):O(1'):O(1')-rubidium], [Rb(C8H6FO3)]n, (III), have been determined and their coordination polymeric structures described...
November 1, 2017: Acta Crystallographica. Section C, Structural Chemistry
John Rausch, Kerry Meyer, Ralf Bennartz, Steven Platnick
Differences in cloud droplet effective radius and cloud droplet number concentration (CDNC) estimates inferred from the Aqua MODIS Collections 5.1 and 6 cloud products (MYD06) are examined for warm clouds over global oceans for the year 2008. Individual pixel level retrievals for both collections are aggregated to 1° × 1° and compared globally and regionally for the three main spectral channel pairs used for MODIS cloud optical property retrievals. Comparisons between both collections are performed for cases in which all three effective radii retrievals are classified by the MODIS Cloud Product as valid...
2017: Atmospheric Measurement Techniques
Nigel T Brockton, Pawadee Lohavanichbutr, Emeka K Enwere, Melissa P Upton, Elizabeth N Kornaga, Steven C Nakoneshny, Pinaki Bose, Chu Chen, Joseph C Dort
Oral squamous cell carcinoma (OSCC) is the most commonly diagnosed type of head and neck cancer, accounting for ~300,000 new cases worldwide annually. Carbonic anhydrase IX (CAIX) and Ki-67 have been associated with reduced disease-specific survival (DSS) in patients with OSCC. We previously proposed a combined CAIX and Ki-67 signature of 'functional hypoxia' and sought to replicate this association in a larger independent cohort of patients with OSCC at the Fred Hutchinson Cancer Research Center (FHCRC) in Seattle...
November 2017: Oncology Letters
Roc Matheu, Jordi Benet-Buchholz, Xavier Sala, Antoni Llobet
In this work we have prepared and characterized two Ru complexes that contain the pentadenatate tda(2-) ligand (tda(2-) = [2,2':6',2″-terpyridine]-6,6″-dicarboxylate) that occupies the equatorial positions and two monodentate ligands aqua and/or dmso that occupy the axial positons: [trans-Ru(III)(tda-κ-N(3)O)(OH2(ax))2](+), 3(III)(OH2)2(+), and [Ru(II)(tda-κ-N(3)O)(dmso)(OH2(ax))], 4(II). The latter is a useful synthetic intermediate for the preparation of Ru-tda complexes with different axial ligands...
November 1, 2017: Inorganic Chemistry
D Fernández-Nóvoa, M Gómez-Gesteira, R Mendes, M deCastro, N Vaz, J M Dias
The role of river discharge, wind and tide on the extension and variability of the Tagus River plume was analyzed from 2003 to 2015. This study was performed combining daily images obtained from the Moderate Resolution Imaging Spectroradiometer (MODIS) sensor located onboard the Aqua and Terra satellites. Composites were generated by averaging pixels with the same forcing conditions. River discharge shows a strong relation with the extension of the Tagus plume. The plume grows with the increasing river discharge and express a two day lag caused by the long residence time of water within the estuary...
2017: PloS One
Marcos Gil-Sepulcre, Michael Böhler, Mauro Schilling, Fernando Bozoglian, Cyril Bachmann, Dominik Scherrer, Thomas Fox, Bernhard Spingler, Carolina Gimbert-Suriñach, Roger Alberto, Roger Bofill, Xavier Sala, Sandra Luber, Craig J Richmond, Antoni Llobet
Ruthenium complexes containing the pentapyridyl ligand 6,6''-(methoxy(pyridin-2-yl)methylene)di-2,2'-bipyridine (L-OMe) of general formula trans-[Ru(II) (X)(L-OMe-κ-N(5) )](n+) (X=Cl, n=1, trans-1(+) ; X=H2 O, n=2, trans-2(2+) ) have been isolated and characterized in solution (by NMR and UV/Vis spectroscopy) and in the solid state by XRD. Both complexes undergo a series of substitution reactions at oxidation state Ru(II) and Ru(III) when dissolved in aqueous triflic acid-trifluoroethanol solutions as monitored by UV/Vis spectroscopy, and the corresponding rate constants were determined...
October 25, 2017: ChemSusChem
Zong-Yao Qian, Jian Ma, Chun-Lei Sun, Zhi-Gang Li, Qi-Ming Xian, Ting-Ting Gong, Bin Xu
Freshwater resources are under stress around the world due to rapid urbanization and excessive water consumption. Cyanobacterial blooms have occurred frequently in surface waters, which produced toxic secondary metabolites causing a potential harm to aquatic ecosystems and humans. In this study, the relationship between different types of nitrogen source and the algal growth of Anabaena flos-aquae, which was isolated from Dianchi Lake in southern China, was investigated. Experiments were accomplished by using four types of isotope tracers including (15)N-ammonium chloride, (15)N-sodium nitrate, (15)N-urea, (15)N-l-alanine in culture medium to characterize the biosynthesis of (15)N-anatoxin-a (ATX-A), which is a major algal toxin from A...
October 6, 2017: Water Research
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