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https://www.readbyqxmd.com/read/29031086/natural-iron-isotopes-influence-on-the-neutron-transport
#1
Martin Schulc, Bohumil Jánský, Davit Harutyunyan, Evžen Novák
As an iron is the main structural component of nuclear power plants as well as future fusion power plants, the validation of neutron incident data libraries of iron is a must. Presented paper fits into ongoing validation activities and presents measuring neutron leakage spectra in the 0.1-1.0MeV region from iron sphere of 100cm in diameter by hydrogen proportional detectors. The experimental result is compared with ENDF/B-VII.1, JEFF-3.2 and CIELO nuclear data libraries. No library reasonably well describes whole region under study...
October 5, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/29021556/unexpected-3-valence-of-iron-in-feo2-a-geologically-important-material-lying-in-between-oxides-and-peroxides
#2
Sergey S Streltsov, Alexey O Shorikov, Sergey L Skornyakov, Alexander I Poteryaev, Daniel I Khomskii
Recent discovery of the pyrite FeO2, which can be an important ingredient of the Earth's lower mantle and which in particular may serve as an extra source of water in the Earth's interior, opens new perspectives for geophysics and geochemistry, but this is also an extremely interesting material from physical point of view. We found that in contrast to naive expectations Fe is nearly 3+ in this material, which strongly affects its magnetic properties and makes it qualitatively different from well known sulfide analogue - FeS2...
October 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29018120/an-engineered-synthetic-pathway-for-discovering-nonnatural-nonribosomal-peptides-in-escherichia%C3%A2-coli
#3
Sara Cleto, Timothy K Lu
Peptides that are synthesized independently of the ribosome in plants, fungi, and bacteria can have clinically relevant anticancer, antihemochromatosis, and antiviral activities, among many other. Despite their natural origin, discovering new natural products is challenging, and there is a need to expand the chemical diversity that is accessible. In this work, we created a novel, compressed synthetic pathway for the heterologous expression and diversification of nonribosomal peptides (NRPs) based on homologs of siderophore pathways from Escherichia coli and Vibrio cholerae To enhance the likelihood of successful molecule production, we established a selective pressure via the iron-chelating properties of siderophores...
October 10, 2017: MBio
https://www.readbyqxmd.com/read/28994038/clusia-hilariana-and-eugenia-uniflora-as-bioindicators-of-atmospheric-pollutants-emitted-by-an-iron-pelletizing-factory-in-brazil
#4
Luzimar Campos da Silva, Talita Oliveira de Araújo, Advanio Inácio Siqueira-Silva, Tiago Augusto Rodrigues Pereira, Letícia Nalon Castro, Eduardo Chagas Silva, Marco Antonio Oliva, Aristéa Alves Azevedo
The objectives of this work were to evaluate if the pollution emitted by the pelletizing factory causes visual symptoms and/or anatomical changes in exposed Eugenia uniflora and Clusia hilariana, in active biomonitoring, at different distances from a pelletizing factory. We characterize the symptomatology, anatomical, and histochemistry alterations induced in the two species. There was no difference in the symptomatology in relation to the different distances of the emitting source. The foliar symptoms found in C...
October 9, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28991787/biosurfactant-production-by-mucor-circinelloides-on-waste-frying-oil-and-possible-uses-in-crude-oil-remediation
#5
Parvin Hasanizadeh, Hamid Moghimi, Javad Hamedi
Biosurfactants are biocompatible surface active agents which many microorganisms produce. This study investigated the production of biosurfactants by Mucor circinelloides. The effects of different factors on biosurfactant production, including carbon sources and concentrations, nitrogen sources, and iron (II) concentration, were studied and the optimum condition determined. Finally, the strain's ability to remove the crude oil and its relationship with biosurfactant production was evaluated. The results showed that M...
October 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28991446/photochemistry-and-anion-controlled-structure-of-fe-iii-complexes-with-an-%C3%AE-hydroxy-acid-containing-tripodal-amine-chelate
#6
Jennifer E Vernia, Mary R Warmin, Jeanette A Krause, David L Tierney, Michael J Baldwin
The tripodal amine chelate with two pyridyl groups and an α-hydroxy acid (AHA) group, Pyr-TPA-AHA, was synthesized. Different Fe(III) complexes form with this chelate depending upon the counterion of the Fe(III) source used in the synthesis. A dinuclear complex, Fe(III)2(Pyr-TPA-AHA)2(μ-O), 1, and mononuclear complexes Fe(III)(Pyr-TPA-AHA)X (X = Cl(-) or Br(-), 2 and 3, respectively) were synthesized. 2 can be easily converted to 1 by addition of silver nitrate or a large excess of water. The structure of 1 was solved by X-ray crystallography (C32H34N6O7Fe2·13H2O, a = 14...
October 9, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28990146/a-preliminary-study-to-design-a-floating-treatment-wetland-for-remediating-acid-mine-drainage-impacted-water-using-vetiver-grass-chrysopogon-zizanioides
#7
Jeffrey D Kiiskila, Dibyendu Sarkar, Kailey A Feuerstein, Rupali Datta
Acid mine drainage (AMD) is extremely acidic, sulfate-rich effluent from abandoned or active mine sites that also contain elevated levels of heavy metals. Untreated AMD can contaminate surface and groundwater and pose severe ecological risk. Both active and passive methods have been developed for AMD treatment consisting of abiotic and biological techniques. Abiotic techniques are expensive and can create large amounts of secondary wastes. Passive biological treatment mainly consists of aerobic or anaerobic constructed wetlands...
October 8, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28989755/facilitation-of-trace-metal-uptake-in-cells-by-inulin-coating-of-metallic-nanoparticles
#8
Esmeralda Santillán-Urquiza, Fernando Arteaga-Cardona, Cristina Torres-Duarte, Bryan Cole, Bing Wu, Miguel A Méndez-Rojas, Gary N Cherr
Trace elements such as zinc and iron are essential for the proper function of biochemical processes, and their uptake and bioavailability are dependent on their chemical form. Supplementation of trace metals through nanostructured materials is a new field, but its application raises concerns regarding their toxicity. Here, we compared the intracellular zinc uptake of different sources of zinc: zinc sulfate, and ZnO and core-shell α-Fe2O3@ZnO nanoparticles, coated or uncoated with inulin, an edible and biocompatible polysaccharide...
September 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28988795/exposure-to-elemental-composition-of-outdoor-pm2-5-at-birth-and-cognitive-and-psychomotor-function-in-childhood-in-four-european-birth-cohorts
#9
Małgorzata J Lubczyńska, Jordi Sunyer, Henning Tiemeier, Daniela Porta, Monika Kasper-Sonnenberg, Vincent W V Jaddoe, Xavier Basagaña, Albert Dalmau-Bueno, Francesco Forastiere, Jürgen Wittsiepe, Barbara Hoffmann, Mark Nieuwenhuijsen, Gerard Hoek, Kees de Hoogh, Bert Brunekreef, Mònica Guxens
BACKGROUND: Little is known about developmental neurotoxicity of particulate matter composition. We aimed to investigate associations between exposure to elemental composition of outdoor PM2.5 at birth and cognitive and psychomotor functions in childhood. METHODS: We analyzed data from 4 European population-based birth cohorts in the Netherlands, Germany, Italy and Spain, with recruitment in 2000-2006. Elemental composition of PM2.5 measurements were performed in each region in 2008-2011 and land use regression models were used to predict concentrations at participants' residential addresses at birth...
October 5, 2017: Environment International
https://www.readbyqxmd.com/read/28987361/comparative-effect-of-horse-gram-and-black-gram-on-inflammatory-mediators-and-antioxidant-status
#10
Vrinda Rajagopal, Chithra K Pushpan, Helen Antony
A balanced diet is important for the overall wellbeing of an individual. Pulses are an important part of a nutritive diet. Pulses have been consumed for at least 10,000 years and are among the most extensively used foods in the world. They are a rich source of protein and fiber, as well as a significant source of vitamins and minerals, such as iron, zinc, and magnesium. The purpose of this study was to compare the effect of two pulses, horse gram and black gram, on inflammatory mediators and the antioxidant enzymes...
October 2017: Journal of Food and Drug Analysis
https://www.readbyqxmd.com/read/28986293/complete-genome-sequence-of-acidihalobacter-prosperus-strain-f5-an-extremely-acidophilic-iron-and-sulfur-oxidizing-halophile-with-potential-industrial-applicability-in-saline-water-bioleaching-of-chalcopyrite
#11
Himel N Khaleque, Melissa K Corbett, Joshua P Ramsay, Anna H Kaksonen, Naomi J Boxall, Elizabeth L J Watkin
Successful process development for the bioleaching of mineral ores, particularly the refractory copper sulfide ore chalcopyrite, remains a challenge in regions where freshwater is scarce and source water contains high concentrations of chloride ion. In this study, a pure isolate of Acidihalobacter prosperus strain F5 was characterized for its ability to leach base metals from sulfide ores (pyrite, chalcopyrite and pentlandite) at increasing chloride ion concentrations. F5 successfully released base metals from ores including pyrite and pentlandite at up to 30gL(-1) chloride ion and chalcopyrite up to 18gL(-1) chloride ion...
October 3, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28985356/multiple-hybrid-de-novo-genome-assembly-of-finger-millet-an-orphan-allotetraploid-crop
#12
Masaomi Hatakeyama, Sirisha Aluri, Mathi Thumilan Balachadran, Sajeevan Radha Sivarajan, Andrea Patrignani, Simon Grüter, Lucy Poveda, Rie Shimizu-Inatsugi, John Baeten, Kees-Jan Francoijs, Karaba N Nataraja, Yellodu A Nanja Reddy, Shamprasad Phadnis, Ramapura L Ravikumar, Ralph Schlapbach, Sheshshayee M Sreeman, Kentaro K Shimizu
Finger millet (Eleusine coracana (L.) Gaertn) is an important crop for food security because of its tolerance to drought, which is expected to be exacerbated by global climate changes. Nevertheless, it is often classified as an orphan/underutilized crop because of the paucity of scientific attention. Among several small millets, finger millet is considered as an excellent source of essential nutrient elements, such as iron and zinc; hence, it has potential as an alternate coarse cereal. However, high-quality genome sequence data of finger millet are currently not available...
September 5, 2017: DNA Research: An International Journal for Rapid Publication of Reports on Genes and Genomes
https://www.readbyqxmd.com/read/28984418/1-4-dioxane-degrading-consortia-can-be-enriched-from-uncontaminated-soils-prevalence-of-mycobacterium-and-soluble-di-iron-monooxygenase-genes
#13
Ya He, Jacques Mathieu, Marcio L B da Silva, Mengyan Li, Pedro J J Alvarez
Two bacterial consortia were enriched from uncontaminated soil by virtue of their ability to grow on 1,4-dioxane (dioxane) as a sole carbon and energy source. Their specific dioxane degradation rates at 30°C, pH = 7 (i.e. 5.7 to 7.1 g-dioxane per g-protein per day) were comparable to those of two dioxane-metabolizing archetypes: Pseudonocardia dioxanivoransCB1190 and Mycobacterium dioxanotrophicusPH-06. Based on 16S rRNA sequencing, Mycobacterium was the dominant genus. Acetylene inhibition tests suggest that dioxane degradation was mediated by monooxygenases...
October 6, 2017: Microbial Biotechnology
https://www.readbyqxmd.com/read/28976522/isolation-and-characterization-of-a-tetranuclear-pt-fefe-pt-intermediate-en-route-to-the-trinuclear-pt-fe-pt-cluster
#14
Kazuhiro Uemura, Masahiro Taoka
An intermediate compound, [{PtFe(piam)2(NH3)2(OCH3)}2(μ-OCH3)2](ClO4)2 (1, piam = pivalamidate), in the synthetic process to form [Pt2Fe(piam)4(NH3)4](ClO4)3 (2) by mixing cis-[Pt(piam)2(NH3)2]·2H2O and iron sources was successfully isolated and characterized by single-crystal X-ray analysis. In 1, the platinum and iron atoms are bridged by two piam ligands to afford a dinuclear Pt-Fe structure and are further linked to each other by methoxide bridges at the equatorial positions of iron atoms to form a tetranuclear Pt-FeFe-Pt complex...
October 4, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28974053/arsenic-removal-from-groundwater-by-solar-driven-inline-electrolytic-induced-co-precipitation-and-filtration-a-long-term-field-test-conducted-in-west-bengal
#15
Philipp Otter, Pradyut Malakar, Bana Bihari Jana, Thomas Grischek, Florian Benz, Alexander Goldmaier, Ulrike Feistel, Joydev Jana, Susmita Lahiri, Juan Antonio Alvarez
Arsenic contamination in drinking water resources is of major concern in the Ganga delta plains of West Bengal in India and Bangladesh. Here, several laboratory and field studies on arsenic removal from drinking water resources were conducted in the past and the application of strong-oxidant-induced co-precipitation of arsenic on iron hydroxides is still considered as the most promising mechanism. This paper suggests an autonomous, solar driven arsenic removal setting and presents the findings of a long term field test conducted in West Bengal...
October 2, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28971743/emission-characterization-of-particulate-matter-in-the-ironmaking-process
#16
Xiaoling Li, Wenqiang Sun, Liang Zhao, Jiuju Cai
The study is to provide a detailed physical and chemical characterization of particles collected in the ironmaking process, including a bunker system, a cast house and a pulverized coal feeding system. Using gravimetric, scanning electron microscope coupled with energy dispersive X-ray spectrometry (SEM-EDS), X-ray fluorescence spectrometry (XRF), inductively coupled plasma optical emission spectrometry (ICP-OES) analyses, the size distribution, morphology, elemental composition and emission factor of particles were investigated...
October 13, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28971671/self-assembly-of-monodisperse-carbon-dots-into-high-brightness-nanoaggregates-for-cellular-uptake-imaging-and-iron-iii-sensing
#17
Tzu-Heng Chen, Wei-Lung Tseng
This study describes a bottom-up assembly route for monodisperse carbon dots (CDs) into different sizes of CD aggregates through the control of the concentration of fatty acids. The highly monodisperse CDs were prepared via solvent-thermal treatment of edible soybean oil, which generated glycerol-based polymer as a carbon source and fatty acid as a surface capping in the synthetic process. The as-synthesized CDs exhibited small particle size variation (2.7 ± 0.2 nm) and narrow emission bands (full width at half-maximum <20 nm)...
October 11, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28969507/societal-costs-of-micronutrient-deficiencies-in-6-to-59-month-old-children-in-pakistan
#18
Simon Wieser, Beatrice Brunner, Christina Tzogiou, Rafael Plessow, Michael B Zimmermann, Jessica Farebrother, Sajid Soofi, Zaid Bhatti, Imran Ahmed, Zulfiqar A Bhutta
BACKGROUND: In Pakistan, nearly half of children younger than 5 years are stunted and 1 in 3 is underweight. Micronutrient deficiencies, a less visible form of undernutrition, are also endemic. They may lead to increased morbidity and mortality as well as to impaired cognitive and physical development. OBJECTIVE: To estimate the lifetime costs of micronutrient deficiencies in Pakistani children aged between 6 and 59 months. METHODS: We develop a health economic model of the lifetime health and cost consequences of iodine, iron, vitamin A, and zinc deficiencies...
January 1, 2017: Food and Nutrition Bulletin
https://www.readbyqxmd.com/read/28967253/fabrication-of-nanoporous-nickel-iron-hydroxylphosphate-composite-as-bifunctional-and-reversible-catalyst-for-highly-efficient-intermittent-water-splitting
#19
Zhanwu Lei, Jingjing Bai, Yibing Li, Zenglin Wang, Chuan Zhao
Global-scale application of water-splitting technology for hydrogen fuel production and storage of intermittent renewable energy sources has called for the development of oxygen- and hydrogen-evolution catalysts that are inexpensive, efficient, robust, and can withstand frequent power interruptions and shutdowns. Here, we report the controlled electrodeposition of porous nickel-iron hydroxylphosphate (NiFe-OH-PO4) nanobelts onto the surface of macroporous nickel foams (NF) as a bifunctional electrocatalyst for efficient whole-cell water electrolysis...
October 9, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28966241/effect-of-minerals-on-intestinal-iga-production-using-deep-sea-water-drinks
#20
Hisashi Shiraishi, Maho Fujino, Naoki Shirakawa, Nanao Ishida, Hiroki Funato, Ayumu Hirata, Noriaki Abe, Michiro Iizuka, Kohei Jobu, Junko Yokota, Mitsuhiko Miyamura
Minerals are essential for life, as they are a vital part of protein constituents, enzyme cofactors, and other components in living organisms. Deep sea water is characterized by its cleanliness and stable low temperature, and its possible health- and medical benefits are being studied. However, no study has yet evaluated the physical properties of the numerous commercially available deep sea water products, which have varying water sources and production methods. We analyzed these products' mineral content and investigated their effect on living organism, focusing on immune functions, and investigated the relation between physiological immunoactivities and mineral intake...
2017: Biological & Pharmaceutical Bulletin
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