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https://www.readbyqxmd.com/read/28108922/association-between-heavy-metal-and-metalloid-levels-in-topsoil-and-cancer-mortality-in-spain
#1
Olivier Núñez, Pablo Fernández-Navarro, Iván Martín-Méndez, Alejandro Bel-Lan, Juan F Locutura Rupérez, Gonzalo López-Abente
Spatio-temporal cancer mortality studies in Spain have revealed patterns for some tumours which display a distribution that is similar across the sexes and persists over time. Such characteristics would be common to tumours that shared risk factors, including the geochemical composition of the soil. The aim of this study was to assess the possible association between heavy metal and metalloid levels in topsoil (upper soil horizon) and cancer mortality in mainland Spain. Ecological cancer mortality study at a municipal level, covering 861,440 cancer deaths (27 different tumour locations) in 7917 Spanish mainland towns, from 1999 to 2008...
January 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28108183/evaluation-of-multiplex-assay-platforms-for-detection-of-influenza-hemagglutinin-subtype-specific-antibody-responses-influenza-ha-subtype-specific-antibody-detection-platform
#2
Zhu-Nan Li, Kimberly M Weber, Rebecca A Limmer, Bobbi J Horne, James Stevens, Joy Schwerzmann, Jens Wrammert, Megan McCausland, Andrew J Phipps, Kathy Hancock, Daniel B Jernigan, Min Levine, Jacqueline M Katz, Joseph D Miller
Influenza hemagglutination inhibition (HI) and virus microneutralization assays (MN) are widely used for seroprevalence studies. However, these assays have limited field portability and are difficult to fully automate for high throughput laboratory testing. To address these issues, three multiplex influenza subtype-specific antibody detection assays were developed using recombinant hemagglutinin antigens in combination with Chembio, Luminex(®), and ForteBio(®) platforms. Assay sensitivity, specificity, and subtype cross-reactivity were evaluated using a panel of well characterized human sera...
January 17, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/28108058/serum-trace-elements-are-interrelated-with-hormonal-imbalance-in-men-with-acute-ischemic-stroke
#3
Anatoly V Skalny, Lydmila L Klimenko, Aliya A Turna, Maria N Budanova, Ivan S Baskakov, Marina S Savostina, Aksana N Mazilina, Anatoly I Deyev, Margarita G Skalnaya, Alexey A Tinkov
: The objective of the present study was to assess hormonal and trace element status in men suffering from acute ischemic stroke. METHODS: 21 acute ischemic stroke patients and 21 age- and body mass index-matched healthy volunteers were enrolled in the study. Serum trace elements were assessed using inductively coupled plasma mass spectrometry. Serum hormones and brain damage markers were estimated using enzyme-linked immunosorbent assay. RESULTS: Ischemic stroke patients are characterized by significantly higher levels of total and free triiodothyronine (T3), anti-thyroid peroxidase antibodies (Anti-TPO-Ab), prolactin, and cortisol, whereas the level of thyroid stimulating hormone (TSH) was decreased...
January 6, 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/28107835/one-step-synthesis-of-dna-functionalized-cadmium-free-quantum-dots-and-its-application-in-fret-based-protein-sensing
#4
Cuiling Zhang, Caiping Ding, Guohua Zhou, Qin Xue, Yuezhong Xian
DNA functionalized quantum dots (QDs) are promising nanoprobes for the fluorescence resonance energy transfer (FRET)-based biosensing. Herein, cadmium-free DNA functionalized Mn-doped ZnS (DNA-ZnS:Mn(2+)) QDs were successfully synthesized by one-step route. As-synthesized QDs show excellent photo-stability with the help of PAA and DNA. Then, we constructed a novel FRET model based on the QDs and WS2 nanosheets as the energy donor-acceptor pairs, which was successfully applied for the protein detection through the terminal protection of small molecule-linked DNA assay...
March 8, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28107435/peptide-targeted-by-human-antibodies-associated-with-hiv-vaccine-associated-protection-assumes-a-dynamic-%C3%AE-helical-structure
#5
Mohammed S Aiyegbo, Evgeny Shmelkov, Lorenzo Dominguez, Michael Goger, Shibani Battacharya, Allan C deCamp, Peter B Gilbert, Phillip W Berman, Timothy Cardozo
The only evidence of vaccine-induced protection from HIV acquisition in humans was obtained in the RV144 HIV vaccine clinical trial. One immune correlate of risk in RV144 was observed to be higher titers of vaccine-induced antibodies (Abs) reacting with a 23-mer non-glycosylated peptide with the same amino acid sequence as a segment in the second variable (V2) loop of the MN strain of HIV. We used NMR to analyze the dynamic 3D structure of this peptide. Distance restraints between spatially proximate inter-residue protons were calculated from NOE cross peak intensities and used to constrain a thorough search of all possible conformations of the peptide...
2017: PloS One
https://www.readbyqxmd.com/read/28106930/local-proton-source-in-the-electrocatalytic-co2-reduction-by-mn-bpy-r-co-3br-complexes
#6
Carlo Nervi, Federico Franco, Claudio Cometto, Luca Nencini, Claudia Barolo, Fabrizio Sordello, Claudio Minero, Jan Fiedler, Marc Robert, Roberto Gobetto
The electrochemical behavior of fac-[Mn(pdbpy)(CO)3Br] (pdbpy = 4-phenyl-6-(phenyl-2,6-diol)-2,2'-bipyridine), 1, in acetonitrile under Ar and its catalytic performances for CO2 reduction with added water, 2,2',2''-trifluoroethanol (TFE) and phenol are discussed in detail. Preparative-scale electrolysis experiments, carried out at -1.5 V vs. SCE in CO2-saturated acetonitrile solutions, reveal that the process selectivity is extremely sensitive to the acid strength, providing CO and formate in different faradaic yields...
January 20, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28106472/sample-preparation-for-repeated-measurements-on-a-single-liquid-droplet-using-laser-induced-breakdown-spectroscopy
#7
Violeta Lazic, Roberta Fantoni, Antonio Palucci, Massimiliano Ciaffi
We studied changes in laser-induced breakdown spectroscopy (LIBS) signal intensity with the thickness of a liquid layer placed on a solid substrate, where an easily evaporating methanol sample was used. For a certain optimal liquid film thickness we obtained a manifold increase of the LIBS signal from methanol. Progressive liquid film thinning leads to a reduction and a successive disappearance of laser-induced splashes; the latter condition drastically reduces the sample consumption and allows measurements to be repeated many times on a single liquid droplet...
January 1, 2017: Applied Spectroscopy
https://www.readbyqxmd.com/read/28106342/electrochemical-reduction-of-oxygen-in-aprotic-ionic-liquids-containing-metal-cations-na-o2-system-case-study
#8
Eneko Azaceta, Lukas Lutz, Alexis Grimaud, Jose Manuel Vicent-Luna, Said Hamad, Luis Yate, Geman Cabañero, Hans-Jurgen Grande, Juan Antonio Anta, Jean-Marie Tarascon, Ramon Tena-Zaera
Metal-air batteries are intensively studied because of their high theoretical energy storage capability. However, the fundamental science at work dealing with electrodes, electrolytes and reaction products still need to be better understood. In this report, the ionic liquid N-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl) imide (PYR14TFSI) is chosen to study the influence of a wide range of metal cations (Mn+) on the electrochemical behavior of oxygen.. We demonstrate the relevance of the Lewis hard-soft acid-base (HSAB) theory to predict satisfactorily the reduction potential of the oxygen reduction in electrolytes containing metal cations...
January 19, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28106264/role-of-microbial-inoculation-and-industrial-by-product-phosphogypsum-on-growth-and-nutrients-uptake-of-maize-zea-mays-l-grown-in-calcareous-soil
#9
Abdul-Aziz R Al-Enazy, Saud S Al-Oud, Fahad N Al-Barakah, R A Adel, Usman
BACKGROUND: Alkaline soils with high calcium carbonate and low organic matter are deficient in plant nutrients availability. Use of organic and bio-fertilizers has been suggested to improve their properties. Therefore, a greenhouse experiment was conducted to evaluate the integrative role of phosphogypsum (PG; added at 0.0, 10, 30, and 50 g PG kg(-1) ), cow manure (CM; added at 50 g kg(-1) ) and mixed microbial inoculation (Incl; Azotobacter chroococcum, phosphate-solubilizing bacterium of Bacillus megaterium var...
January 20, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28106221/the-magnetoresistance-effect-in-a-conducting-molecular-crystal-consisting-of-dicyano-phthalocyaninato-manganese-iii
#10
Masaki Matsuda, Gosuke Yoshida, Jun-Ichi Yamaura, Tamotsu Inabe, Hiroyuki Tajima
A conducting molecular crystal TPP[Mn(III)(Pc)(CN)2]2 (Mn(III): d(4), S = 1, TPP = tetraphenylphosphonium and Pc = phthalocyanine) was fabricated. In its crystal structure, the [Mn(III)(Pc)(CN)2] units formed a one-dimensional regular chain along the c-axis with an overlap integral value of 8.6 × 10(-3). TPP[Mn(III)(Pc)(CN)2]2 showed a semiconducting behaviour that also has been observed for isostructural TPP[Co(III)(Pc)(CN)2]2 (Co(III): d(6), S = 0) and TPP[Fe(III)(Pc)(CN)2]2 (Fe(III): d(5), S = 1/2) whose ground states are charge-ordered states...
January 20, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28105999/transcatheter-aortic-valve-replacement-with-the-portico-valve-one-year-results-of-the-early-canadian-experience
#11
Gidon Y Perlman, Anson Cheung, Eric Dumont, Dion Stub, Danny Dvir, Maria Del Trigo, Marc Pelletier, Sami Alnasser, Jian Ye, David Wood, Christopher Thompson, Philipp Blanke, Jonathon Leipsic, Michael A Seidman, Heather LeBlanc, Christopher E Buller, Josep Rodés-Cabau, John G Webb
AIMS: The aim of this study was to examine the short- and medium-term outcomes of transcatheter aortic valve replacement (TAVR) with the self-expanding and repositionable Portico valve (St. Jude Medical, St. Paul, MN, USA). METHODS AND RESULTS: A total of 57 patients underwent TAVR with the Portico valve between March 2012 and August 2014, representing the first-in-human experience and the entire early experience in Canada. Patients were followed up at 30 days and one year with repeat echocardiography and clinical review...
January 20, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28105594/screening-of-inorganic-and-organic-contaminants-in-floodwater-in-paddy-fields-of-hue-and-thanh-hoa-in-vietnam
#12
Ha Thu Trinh, Helle Marcussen, Hans Christian B Hansen, Giang Truong Le, Hanh Thi Duong, Nguyen Thuy Ta, Trung Quang Nguyen, Soren Hansen, Bjarne W Strobel
In the rainy season, rice growing areas in Vietnam often become flooded by up to 1.5 m water. The floodwater brings contaminants from cultivated areas, farms and villages to the rice fields resulting in widespread contamination. In 2012 and 2013, the inorganic and organic contaminants in floodwater was investigated in Thanh Hoa and Hue. Water samples were taken at 16 locations in canals, paddy fields and rivers before and during the flood. In total, 940 organic micro-pollutants in the water samples were determined simultaneously by GC-MS method with automatic identification and quantification system (AIQS), while ICP-MS was used for determination of ten trace elements in the samples...
January 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28105592/investigation-of-heavy-metal-pollution-in-eastern-aegean-sea-coastal-waters-by-using-cystoseira-barbata-patella-caerulea-and-liza-aurata-as-biological-indicators
#13
S Aydın-Önen, M Öztürk
In order to have an extensive contamination profile of heavy metal levels (Cd, Cu, Fe, Mn, Ni, Pb, and Zn), seawater, sediment, Patella caerulea, Cystoseira barbata, and Liza aurata were investigated by using inductively coupled plasma-atomic emission spectrometry (ICP-AES). Samples were collected from five coastal stations along the eastern Aegean Sea coast (Turkey) on a monthly basis from July 2002 through May 2003. According to the results of this study, heavy metal levels were arranged in the following sequence: Fe > Pb > Zn > Mn > Ni > Cu > Cd for water, Fe > Cu > Mn > Ni > Zn > Pb > Cd for sediment, Fe > Zn > Mn > Pb > Ni > Cd > Cu for C...
January 19, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28105402/multishelled-ni-rich-li-ni-x-co-y-mn-z-o2-hollow-fibers-with-low-cation-mixing-as-high-performance-cathode-materials-for-li-ion-batteries
#14
Yihui Zou, Xianfeng Yang, Chunxiao Lv, Tongchao Liu, Yanzhi Xia, Lu Shang, Geoffrey I N Waterhouse, Dongjiang Yang, Tierui Zhang
A simple seaweed biomass conversion strategy is proposed to synthesize highly porous multishelled Ni-rich Li(Ni x Co y Mn z )O2 hollow fibers with very low cation mixing. The low cation mixing results from the cation confinement by the novel "egg-box" structure in the alginate template. These hollow fibers exhibit remarkable energy density, high-rate capacity, and long-term cycling stability when used as cathode material for Li-ion batteries.
January 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28104559/distribution-of-heavy-metals-and-metalloids-in-bulk-and-particle-size-fractions-of-soils-from-coal-mine-brownfield-and-implications-on-human-health
#15
Hongxia Li, Hongbing Ji, Chunjing Shi, Yang Gao, Yan Zhang, Xiangyu Xu, Huaijian Ding, Lei Tang, Yuxin Xing
Heavy metals (HMs) and metalloids migrate into their surroundings, thus increasing environmental risks and threatening human health. Current studies on coal-mine brownfields, however, have not thoroughly investigated soil-associated HMs and metalloids produced by coal mining. Therefore, this study explored the spatial and particle fraction distribution and human health implications of HMs and metalloids. The soil-associated HMs and metalloids are Arsenic (As), Cadmium (Cd), Chromium (Cr), Copper (Cu), Mercury (Hg), Manganese (Mn), Nickel (Ni), Lead (Pb), Scandium (Sc), Titanium (Ti) and Zinc (Zn)...
January 6, 2017: Chemosphere
https://www.readbyqxmd.com/read/28104400/the-difference-in-in-vivo-sensitivity-between-bacillus-licheniformis-perr-and-bacillus-subtilis-perr-is-due-to-the-different-cellular-environments
#16
Jung-Hoon Kim, Young-Bin Won, Chang-Jun Ji, Yoon-Mo Yang, Su-Hyun Ryu, Shin-Yeong Ju, Yumi Kwon, Yeh-Eun Lee, Jin-Won Lee
PerR, a member of Fur family of metal-dependent regulators, is a major peroxide sensor in many Gram positive bacteria, and controls the expression of genes involved in peroxide resistance. Bacillus licheniformis, a close relative to the well-studied model organism Bacillus subtilis, contains three PerR-like proteins (PerRBL, PerR2 and PerR3) in addition to Fur and Zur. In the present study, we characterized the role of PerRBL in B. licheniformis. In vitro and in vivo studies indicate that PerRBL, like PerRBS, uses either Fe(2+) or Mn(2+) as a corepressor and only the Fe(2+)-bound form of PerRBL senses low levels of H2O2 by iron-mediated histidine oxidation...
January 16, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28103764/multimodal-pediatric-pain-management-part-2
#17
Stefan J Friedrichsdorf
Dr Stefan Friedrichsdorf speaks to Commissioning Editor Jade Parker: Stefan Friedrichsdorf, MD, is medical director of the Department of Pain Medicine, Palliative Care and Integrative Medicine at Children's Hospitals and Clinics of Minnesota in Minneapolis/St Paul, MN, USA, home to one of the largest and most comprehensive programs of its kind in the country. The pain and palliative care program is devoted to control acute, chronic/complex and procedural pain for inpatients and outpatients in close collaboration with all pediatric subspecialties at Children's Minnesota...
January 20, 2017: Pain Management
https://www.readbyqxmd.com/read/28103013/building-nanoporous-metal-organic-frameworks-armour-on-fibers-for-high-performance-composite-materials
#18
Xiaobin Yang, Xu Jiang, Yudong Huang, Zhanhu Guo, Lu Shao
The nanoporous Metal-Organic Frameworks (MOFs) "armour" is in situ intergrown onto the surfaces of carbon fibers (CFs) by nitric acid oxidization to supply nucleation sites, and serves as a novel interfacial linker between the fiber and polymer matrix and a smart cushion to release interior and exterior applied forces. Simultaneous enhancements of the interfacial and interlaminar shear strength as well as the tensile strength of CFs were achieved. With the aid of an ultrasonic "cleaning" process, the optimized surface energy and tensile strength of CFs with a MOF "armour" are 83...
January 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28102962/general-synthesis-of-multishell-mixed-metal-oxyphosphide-particles-with-enhanced-electrocatalytic-activity-in-the-oxygen-evolution-reaction
#19
Bu Yuan Guan, Le Yu, Xiong Wen David Lou
We report a general approach for the synthesis of multishell mixed-metal oxyphosphide particles. Seven-layer Mn-Co oxide particles were first prepared by thermal treatment of Mn-Co coordination polymer precursors. Afterwards, these multishell Mn-Co oxide particles were further transformed into multishell Mn-Co oxyphosphide particles through a phosphidation reaction. This approach is very versatile and can be applied to synthesize other multishell mixed-metal oxyphosphide particles with different compositions...
January 19, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28102667/two-different-structures-of-the-oxygen-evolving-complex-in-the-same-polypeptide-frameworks-of-photosystem-ii
#20
Ayako Tanaka, Yoshimasa Fukushima, Nobuo Kamiya
The oxygen-evolving complex (OEC) forms the heart of photosystem II (PSII) in photosynthesis. The crystal structure of PSII from Thermosynechococcus vulcanus has been reported at a resolution of 1.9 Å and at an averaged X-ray dose of 0.43 MGy. The OEC structure is suggested to be partially reduced to Mn(II) by EXAFS and DFT compu-tational studies. Recently, the "radiation-damage-free" struc-tures have been published at 1.95 Å resolution using XFEL, but reports continued to appear that the OEC is reduced to the S0-state of the Kok cycle...
January 19, 2017: Journal of the American Chemical Society
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