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Fatima Khanum, Muhammad Nawaz Chaudhry, Prashant Kumar
This study aims to assess the long-term trend of fine particles (PM2.5; ≤2.5 μm) at two urban sites of Lahore during 2007-2011. These sites represent two distinct areas: commercial (Townhall) and residential cum industrial (Township). The highest daily mean concentrations of PM2.5 were noted as 389 and 354 μg m(-3) at the Townhall and Township sites, respectively. As expected, the annual seasonal mean of PM2.5 was about 53 and 101% higher during winter compared with the summer and monsoon/post-monsoon seasons, respectively...
2017: Air Quality, Atmosphere, & Health
Jong-Young Lee, Kee-Chan Joo, Peter H Brubaker
BACKGROUND: The purpose of this study was to examine the effects of aqua walking (AW) on coronary artery disease (CAD) and cardiorespiratory fitness in older adults with osteoarthritis in the lower extremity and compare it with that of traditional over-ground walking. METHODS: Sixty consecutive eligible patients who had undergone percutaneous coronary intervention for CAD with limited ambulation due to lower extremity osteoarthritis were recruited. They were randomly assigned to the AW program group, treadmill/track walking (TW) program group, or non-exercise control group (CON)...
September 21, 2017: BMC Cardiovascular Disorders
Phil Liebing
The mol-ecular and crystal structure of the l-proline-derived di-thio-carbamate-carboxyl-ate compound poly[tri-μ-aqua-(μ-2-carboxyl-atopyrrolidine-1-carbodi-thio-ato)dipotassium], [K2(C6H7NO2S2)(H2O)3] n or K2(SSC-NC4H7-COO)·3H2O, has been determined. The di-thio-carbamate moiety displays a unique coordination mode, comprising a 'side-on' π-coordinated K(+) cation besides a commonly σ-chelated K(+) cation. By bridging coordination of the CSS group, COO group and water mol-ecules, the K(+) cations are linked into a two-dimensional coordination polymer extending parallel to the ab plane...
September 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
Wannur Sofiasalamah Khairiah A Rahman, J Ahmad, Siti Nadiah Abdul Halim, Mukesh M Jotani, Edward R T Tiekink
The full mol-ecule of the binuclear title compound, [Cd2Cl2(C6H8O4)(C6H8N2)2(H2O)2], is generated by the application of a centre of inversion located at the middle of the central CH2-CH2 bond of the adipate dianion; the latter chelates a Cd(II) atom at each end. Along with two carboxyl-ate-O atoms, the Cd(II) ion is coordinated by the two N atoms of the chelating benzene-1,2-di-amine ligand, a Cl(-) anion and an aqua ligand to define a distorted octa-hedral CdClN2O3 coordination geometry with the monodentate ligands being mutually cis...
September 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
Tuncer Hökelek, Gülçin Şefiye Aşkın, Safiye Özkaya, Hacali Necefoğlu
The asymmetric unit of the title complex, [Zn(C10H11O2)2(C6H6N2O)2(H2O)], contains one half of the complex mol-ecule, and the Zn(II) cation and the water O atom lie on a twofold rotation axis. The Zn(II) cation is coordinated by two carboxyl-ate O atoms of the two symmetry-related 2,4,6-tri-methyl-benzoate (TMB) anions and by the water O atom at distances of 2.0311 (16) and 2.076 (2) Å to form a slightly distorted trigonal-planar arrangement, while the distorted trigonal-bipyramidal coordination sphere is completed by the two pyridine N atoms of the two symmetry-related monodentate nicotinamide (NA) ligands at distances of 2...
September 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
Hicham El Hamdani, Mohammed El Amane, Carine Duhayon
The title complex, [Co(C7H7N4O2)2(H2O)4], comprises mononuclear mol-ecules consisting of a Co(II) ion, two deprotonated theophylline ligands (systematic name: 1,3-dimethyl-7H-purine-2,6-dione) and four coordinating water mol-ecules. The Co(II) atom lies on an inversion centre and has a slightly distorted octa-hedral coordination environment, with two N atoms of two trans-oriented theophylline ligands and the O atoms of four water mol-ecules. An intra-molecular hydrogen bond stabilizes this conformation. A three-dimensional supra-molecular network structure is formed by inter-molecular O-H⋯O and O-H⋯N hydrogen bonds...
September 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
Tuncer Hökelek, Gizem Sertkaya, Ezgi Ay, Safiye Özkaya, Hacali Necefoğlu
In the title Ni(II) complex, [Ni(C10H11O2)2(C6H6N2O)2(H2O)2]·2H2O, the divalent Ni ion occupies a crystallographically imposed centre of symmetry and is coordinated by two O atoms from the carboxyl-ate groups of two 2,4,6-tri-methyl-benzoate (TMB) ligands [Ni-O = 2.0438 (12) Å], two N atoms from the pyridyl groups of two isonicotinamide (INA) ligands [Ni-N = 2.1506 (15) Å] and two water mol-ecules [Ni-O = 2.0438 (12) Å] in a slightly distorted octa-hedral geometry. The coordinating water mol-ecules are hydrogen bonded to the non-coordinating carboxyl-ate O atom of the TMB ligand [O⋯O = 2...
July 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
NDiaye Mbossé Gueye, Dieng Moussa, Elhadj Ibrahima Thiam, Aliou Hamady Barry, Mohamed Gaye, Pascal Retailleau
In the title compound, [Tb(C2H3O2)2(C11H10N4)(H2O)2]NO3·H2O, the Tb(3+) ion is nine-coordinated in a distorted tricapped trigonal-prismatic geometry by the three N atoms of the tridentate 1-(pyridin-2-yl-methyl-idene)-2-(pyridin-2-yl)hydrazine ligand, four carboxyl-ate O atoms of two chelating acetate groups and two O atoms of the coordinating water mol-ecules. The organic hydrazine ligand is disordered over two orientations with a refined occupancy ratio of 0.52 (3):0.48 (3). All bond lengths in the coordination environment of the Tb(3+) ion are slightly larger than those observed in the isostructural Y(3+) and Er(3+) complexes...
July 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
Filip Šebesta, Mateusz Z Brela, Silvia Diaz, Sebastian Miranda, Jane S Murray, Soledad Gutiérrez-Oliva, Alejandro Toro-Labbé, Artur Michalak, Jaroslav V Burda
This study involves the intramolecular proton transfer (PT) process on a thymine nucleobase between N3 and O2 atoms. We explore a mechanism for the PT assisted by hexacoordinated divalent metals cations, namely Mg(2+) , Zn(2+) , and Hg(2+) . Our results point out that this reaction corresponds to a two-stage process. The first involves the PT from one of the aqua ligands toward O2. The implications of this stage are the formation of a hydroxo anion bound to the metal center and a positively charged thymine...
September 18, 2017: Journal of Computational Chemistry
Martin Culka, Simona G Huwiler, Matthias Boll, G Matthias Ullmann
Aromatic compounds are environmental pollutants with toxic and carcinogenic properties. Despite the stability of aromatic rings, bacteria are able to degrade the aromatic compounds into simple metabolites and use them as growth substrates under oxic or even under anoxic conditions. In anaerobic microorganisms, most monocyclic aromatic growth substrates are converted to the central intermediate benzoyl-coenzyme A, which is enzymatically reduced to cyclohexa-1,5-dienoyl-CoA. The strcitly anaerobic bacterium \textit{Geobacter metallireducens} uses the class II benzoyl-CoA reductase complex for this reaction...
September 18, 2017: Journal of the American Chemical Society
N Harikrishna, S Mahalakshmi, K Kiran Kumar, Gopal Reddy
Fish processing industries generate large quantities of fish scales as processing waste, if not treated leading to environmental pollution. Fish scales are hard to degrade, hence cause difficulty in waste management. In this context present study was made to utilize fish scales as substrate for the production of alkaline protease by Bacillus altitudinis GVC11 and subsequently amino acid rich aqua hydrolyzate. B. altitudinis GVC11 efficiently utilized five types of fish scales as substrates and produced maximum alkaline protease using Labeo rohita (28,150 U/mL) followed by Catla catla (23,320 U/mL) at 48 h and Cyprinus carpio (17,146 U/mL) Mugil cephalus (18,917 U/mL), Cirrhinus mrigala (12,430 U/mL) at 72 h...
September 2017: Indian Journal of Microbiology
Shigeru Nakatsuka, Shunsuke Akari, Jakapan Chantana, Takashi Minemoto, Yoshitaro Nose
We report on the optimization of interface structure in ZnSnP2 solar cells. The effects of back electrode materials and related interface on photovoltaic performance were investigated. It was clarified that a conventional structure Mo/ZnSnP2 showed a schottky-behaviour, while an ohmic-behaviour was observed in the Cu/ZnSnP2 structure annealed at 300 °C. STEM-EDX analysis suggested that Cu-Sn-P ternary compound was formed at the interface. This compound is considered to play an important role to obtain the ohmic contact between ZnSnP2 and Cu...
September 12, 2017: ACS Applied Materials & Interfaces
Katja Dörnhöfer, Philip Klinger, Thomas Heege, Natascha Oppelt
Phytoplankton indicated by its photosynthetic pigment chlorophyll-a is an important pointer on lake ecology and a regularly monitored parameter within the European Water Framework Directive. Along with eutrophication and global warming cyanobacteria gain increasing importance concerning human health aspects. Optical remote sensing may support both the monitoring of horizontal distribution of phytoplankton and cyanobacteria at the lake surface and the reduction of spatial uncertainties associated with limited water sample analyses...
September 7, 2017: Science of the Total Environment
Andreu Rico, Rianne Jacobs, Paul J Van den Brink, Alfredo Tello
Estimating antibiotic pollution and antibiotic resistance development risks in environmental compartments is important to design management strategies that advance our stewardship of antibiotics. In this study we propose a modelling approach to estimate the risk of antibiotic resistance development in environmental compartments and demonstrate its application in aquaculture production systems. We modelled exposure concentrations for 12 antibiotics used in Vietnamese Pangasius catfish production using the ERA-AQUA model...
September 5, 2017: Environmental Pollution
Gulbin Ergin, Didem Karadibak, Hulya Ozlem Sener, Baris Gurpinar
BACKGROUND: The purpose of this study is to investigate the effects of the aqua-lymphatic therapy (ALT) on unilateral lower extremity lymphedema in the maintenance phase. MATERIALS AND METHODS: This is a randomized controlled trial with a blinded assessor. The study was completed with 30 ALT and 27 control group participants. Foot volume was assessed by a water displacement device, limb volume by circumference measurements, functional capacity by a 6-minute walk test, quality of life by Short Form-36, and social appearance by Social Appearance Anxiety Scale and hopeless by Beck Hopeless Scale...
September 2017: Lymphatic Research and Biology
Khai Nghi Truong, Carina Merkens, Ulli Englert
3-(Pyridin-4-yl)acetylacetone (HacacPy) acts as a pyridine-type ligand towards Cd(II) and Hg(II) halides. With CdBr2, the one-dimensional polymer [Cd(μ-Br)2(HacacPy)Cd(μ-Br)2(HacacPy)2]∞ is obtained in which five- and six-coordinated Cd(II) cations alternate in the chain direction. Reaction of HacacPy with HgBr2 results in [Hg(μ-Br)Br(HacacPy)]∞, a polymer in which each Hg(II) centre is tetracoordinated. In both compounds, each metal(II) cation is N-coordinated by at least one HacacPy ligand. Equimolar reaction between these Cd(II) and Hg(II) derivatives, either conducted in ethanol as solvent or via grinding in the solid state, leads to ligand redistribution and the formation of the well-ordered bimetallic polymer catena-poly[[bromidomercury(II)]-μ-bromido-[aquabis[4-hydroxy-3-(pyridin-4-yl)pent-3-en-2-one]cadmium(II)]-di-μ-bromido], [CdHgBr4(C10H11NO2)2(H2O)]n or [{HgBr}(μ-Br){(HacacPy)2Cd(H2O)}(μ-Br)2]∞...
September 1, 2017: Acta Crystallographica. Section C, Structural Chemistry
Benjamin Legrand, Amélie Lamarque, Marion Sabart, Delphine Latour
Akinetes are resistant cells which have the ability to persist in sediment for several decades. We have investigated the temporal distribution of akinetes of two species, Dolichospermum macrosporum and Dolichospermum flos-aquae, in a sediment core sampled in Lake Aydat (France), which covers 220 years. The upper part, from 1907 to 2016, the number of akinetes fluctuated but stayed at high concentrations, especially for D. macrosporum in surface sediment (with the maximal value close to 6.10⁵ akinetes g DW(-1) of sediment), suggesting a recurrence of blooms of this species which was probably closely related to anthropic eutrophication since the 1960s...
September 4, 2017: Toxins
Chandra Sekhar Kuruva, Maria Manczak, Xiangling Yin, Gilbert Ogunmokun, Arubala P Reddy, P Hemachandra Reddy
The purpose of our study was to develop a therapeutic target that can reduce Aβ and Drp1 levels, and also can inhibit abnormal interactions between Aβ and Drp1 in AD neurons. To achieve this objective, we designed various compounds and their 3-dimensional molecular structures were introduced into Aβ and Drp1 complex and identified their inhibitory properties against Aβ-Drp1 interaction. Among all, DDQ was selected for further investigation because of 1) its best docking score and 2) its binding capability at interacting sites of Drp1 and Aβ complex...
September 1, 2017: Human Molecular Genetics
Ya-Qian Lan, Yuanyuan Guo, Jun Zhang, Longzhang Dong, Yan Xu, Wei Han, Min Fang, Hong-Ke Liu, Yong Wu
The difficulty of obtaining large single crystals of aluminum carboxylate MOFs (Al-MOFs) for structure determinations has limited the development of these water and thermally stable MOFs. In this work, how large single crystals of the known MIL-53(Al) and the first two tetrahedral ligand based, visible light absorbing 3D Al-MOFs, [Al3(OH)3(HTCS)2] (AlTCS-1) and [Al5O2(OH)3(TCS)2(H2O)2] (AlTCS-2) (TCS = tetrakis(4-oxycarbonylphenyl) silane) are obtained in the presence of hydrofluoric or formic acid for conventional single-crystal diffraction measurements are presented, demonstrating a general method of obtaining large and good quality single crystals of Al-MOFs...
August 28, 2017: Chemistry: a European Journal
Adar Rosenfeld, Michael Dorman, Joel Schwartz, Victor Novack, Allan C Just, Itai Kloog
Meteorological stations measure air temperature (Ta) accurately with high temporal resolution, but usually suffer from limited spatial resolution due to their sparse distribution across rural, undeveloped or less populated areas. Remote sensing satellite-based measurements provide daily surface temperature (Ts) data in high spatial and temporal resolution and can improve the estimation of daily Ta. In this study we developed spatiotemporally resolved models which allow us to predict three daily parameters: Ta Max (day time), 24h mean, and Ta Min (night time) on a fine 1km grid across the state of Israel...
August 21, 2017: Environmental Research
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