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Iron source

Catherine Jumarie, Philippe Aras, Monique Boily
The increasing loss of bee colonies in many countries has prompted a surge of studies on the factors affecting bee health. In North America, main crops such as maize and soybean are cultivated with extensive use of pesticides that may affect non-target organisms such as bees. Also, biosolids, used as a soil amendment, represent additional sources of metals in agroecosystems; however, there is no information about how these metals could affect the bees. In previous studies we investigated the effects of environmentally relevant doses of herbicides and metals, each individually, on caged honey bees...
October 22, 2016: Chemosphere
C Loredo, A Ordóñez, E Garcia-Ordiales, R Álvarez, N Roqueñi, P Cienfuegos, A Peña, N M Burnside
Abandoned and flooded mine networks provide underground reservoirs of mine water that can be used as a renewable geothermal energy source. A complete hydrochemical characterization of mine water is required to optimally design the geothermal installation, understand the hydraulic behavior of the water in the reservoir and prevent undesired effects such as pipe clogging via mineral precipitation. Water pumped from the Barredo-Figaredo mining reservoir (Asturias, NW Spain), which is currently exploited for geothermal use, has been studied and compared to water from a separate, nearby mountain mine and a river that receives mine water discharge and partially infiltrates into the mine workings...
October 22, 2016: Science of the Total Environment
Aleksandar Ž Kostić, Lazar M Kaluđerović, Biljana P Dojčinović, Miroljub B Barać, Vojka B Babić, Marina P Mačukanović-Jocić
BACKGROUND: Bee pollen has already proved to be a good supplement rich in content of iron and zinc. Studies about application of flower pollen in food industry and medicine have been started. Bearing in mind prevalence of maize as crop culture its pollen will be easily available. The mineral composition of pollen of seven Serbian maize hybrids was analyzed in order to establish its nutritional value and benefits of its implementation in the human diet using ICP method. RESULTS: Presence of twenty four different macro- (nine) and micronutrients (fifteen) was detected...
October 24, 2016: Journal of the Science of Food and Agriculture
Adriana Lau da Silva Martins, Luís Alberto César Teixeira, Fabiana Valéria da Fonseca, Lídia Yokoyama
The present study investigated the degradation of mercaptobenzothiazole (MBT), evaluating homogeneous and heterogeneous systems. An iron mineral residue from the desliming step of iron mining was used as a source in the Fenton-like reaction (advanced oxidation process). A granulometric analysis of the residue was performed and yielded fractions with high hematite (Fe2O3) and low quartz content in sieves from 74 to below 44 mm. In this particle size range, the hematite content from 58.9% to 67.4% and the Brunauer-Emmett-Teller area from 0...
October 24, 2016: Environmental Technology
Afghany Mostavan, Carlo Paternoster, Ranna Tolouei, Edward Ghali, Dominique Dubé, Diego Mantovani
With its proven biocompatibility and excellent mechanical properties, iron is an excellent source material for clinical cardiac and vascular applications. However, its relatively low degradation rate limits its use for the healing and remodeling of diseased blood vessels. To address these issues, a multi-purpose fabrication process to develop a bilayer alloy composed of electroformed iron (E-Fe) and iron-phosphorus (Fe-P) was employed. Bilayers of Fe/Fe-P were produced in an electrolytic bath. The effects of electrolyte chemical composition and deposition current density (idep) on layer structure and chemical composition were assessed by scanning electron microscopy, electron probe microanalysis, X-ray diffraction and X-ray photoelectron spectroscopy...
January 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
Hiroko Makita, Emiko Tanaka, Satoshi Mitsunobu, Masayuki Miyazaki, Takuro Nunoura, Katsuyuki Uematsu, Yoshihiro Takaki, Shinro Nishi, Shigeru Shimamura, Ken Takai
A novel iron-oxidizing chemolithoautotrophic bacterium, strain ET2(T), was isolated from a deep-sea sediment in a hydrothermal field of the Bayonnaise knoll of the Izu-Ogasawara arc. Cells were bean-shaped, curved short rods. Growth was observed at a temperature range of 15-30 °C (optimum 25 °C, doubling time 24 h) and a pH range of 5.8-7.0 (optimum pH 6.4) in the presence of NaCl at a range of 1.0-4.0 % (optimum 2.75 %). The isolate was a microaerophilic, strict chemolithoautotroph capable of growing using ferrous iron and molecular oxygen (O2) as the sole electron donor and acceptor, respectively; carbon dioxide as the sole carbon source; and either ammonium or nitrate as the sole nitrogen source...
October 20, 2016: Archives of Microbiology
Jiangshan Ma, Keke Zhang, Mei Huang, Stanton B Hector, Bin Liu, Chunyi Tong, Qian Liu, Jiarui Zeng, Yan Gao, Ting Xu, Ying Liu, Xuanming Liu, Yonghua Zhu
BACKGROUND: Lignocellulolytic bacteria have revealed to be a promising source for biofuel production, yet the underlying mechanisms are still worth exploring. Our previous study inferred that the highly efficient lignocellulose degradation by bacterium Pantoea ananatis Sd-1 might involve Fenton chemistry (Fe(2+) + H2O2 + H(+) → Fe(3+) + OH· + H2O), similar to that of white-rot and brown-rot fungi. The aim of this work is to investigate the existence of this Fenton-based oxidation mechanism in the rice straw degradation process of P...
2016: Biotechnology for Biofuels
Chongjun Zhao, Xiaoxiao Shao, Yuxiao Zhang, Xiuzhen Qian
A Fe2O3/RGO/Fe3O4 nanocomposite in-situ grown on Fe foil was synthesized via a simple one-step hydrothermal growth process, where the iron foil served as support, reductant of GO, Fe source of Fe3O4 and also the current collector of electrode. When it was directly acted as the electrode of a supercapacitor, as-synthesized Fe2O3/RGO/Fe3O4@Fe exhibited excellent electrochemical performance with high capability of 337.5 mF/cm2 at 20 mA/cm2 and superior cyclability with 2.3 % of capacity loss from 600th cycle to 2000th cycle...
October 19, 2016: ACS Applied Materials & Interfaces
Kelsie Y Chesnut, Melissa Barragan, Jason Gravel, Natalie A Pifer, Keramet Reiter, Nicole Sherman, George E Tita
OBJECTIVES: California has strict firearm-related laws and is exceptional in its regulation of firearms retailers. Though evidence suggests that these laws can reduce illegal access to guns, high levels of gun violence persist in Los Angeles (LA), California. This research seeks to describe the sources of guns accessed by active offenders in LA, California and reports offenders' motivations for obtaining guns. SETTING: Los Angeles County Jail (LACJ) system (four facilities)...
October 6, 2016: Injury Prevention: Journal of the International Society for Child and Adolescent Injury Prevention
Wai Cheng Foong, Jacqueline J Ho, C Khai Loh, Vip Viprakasit
BACKGROUND: Non-transfusion dependent beta thalassaemia is a subset of inherited haemoglobin disorders characterised by reduced production of the beta globin chain of the haemoglobin molecule leading to anaemia of varying severity. Although blood transfusion is not a necessity for survival, it is required when episodes of chronic anaemia occur. This chronic anaemia can impair growth and affect quality of life. People with non-transfusion dependent beta thalassaemia suffer from iron overload due to their body's increased capability of absorbing iron from food sources...
October 18, 2016: Cochrane Database of Systematic Reviews
Yuanyuan Chen, Jian Li, Jin Wei, Atufa Kawan, Li Wang, Xuezhen Zhang
Cyanobacterial blooms and their associated toxins pose a great threat to human beings. The situation is even worse for those whose drinking water source is a cyanotoxin-polluted water body. Therefore, efficient and safe treatments urgently need to be developed. The present study verified the application of vitamin C on the inhibition of toxic Microcystis aeruginosa. Our results showed that vitamin C drove the Fenton reaction and significantly sterilized cultures of M. aeruginosa. The algicidal activity of vitamin C was dependent on its involvement in iron (Fe) metabolism...
October 6, 2016: Journal of Hazardous Materials
Małgorzata Czerwonka, Andrzej Tokarz
In developed countries, due to high content and bioavailability, red and processed meats are the main sources of iron in the diet. Adequate intake of this nutrient is essential for the proper development and functioning of the human body, and its deficiencies are associated mainly with the occurrence of anemia, which is one of the most widespread nutritional problems in the world. However, excessive intake of iron can be detrimental to health. Studies have shown that high consumption of red meat and its products, and thereby iron, particularly in the form of heme, increases the risk of non-communicable diseases, including cancers, type II diabetes and cardiovascular disease...
October 2, 2016: Meat Science
Lukas C Buelens, Vladimir V Galvita, Hilde Poelman, Christophe Detavernier, Guy B Marin
Efficient CO2 transformation from a waste product to carbon source for chemicals and fuels will require reaction conditions that effect its reduction. We develop a "super-dry" CH4 reforming reaction for enhanced CO production from CH4 and CO2 We used Ni/MgAl2O4 as a CH4 reforming catalyst, Fe2O3/MgAl2O4 as a solid oxygen carrier, and CaO/Al2O3 as a CO2 sorbent. The isothermal coupling of these three different processes resulted in higher CO production compared with conventional dry reforming by avoiding back reactions with water...
October 13, 2016: Science
(no author information available yet)
BACKGROUND: Non-fatal outcomes of disease and injury increasingly detract from the ability of the world's population to live in full health, a trend largely attributable to an epidemiological transition in many countries from causes affecting children, to non-communicable diseases (NCDs) more common in adults. For the Global Burden of Diseases, Injuries, and Risk Factors Study 2015 (GBD 2015), we estimated the incidence, prevalence, and years lived with disability for diseases and injuries at the global, regional, and national scale over the period of 1990 to 2015...
October 8, 2016: Lancet
G O Latunde-Dada, W Yang, M Vera Aviles
Interest in the consumption of insects (entomophagy) as an alternative environmentally sustainable source of protein in the diet of humans has recently witnessed a surge. As knowledge of the nutrient composition and, in particular, the bioavailability of minerals from insects, is currently sparse. This study evaluated the availability of Fe, Ca, Cu, Mg, Mn, and Zn from four commonly eaten insects and compared these to sirloin beef. Soluble iron from the samples was measured by inductively coupled plasma optical emission spectrometry (ICP-OES)...
October 12, 2016: Journal of Agricultural and Food Chemistry
Daniel A Thomas, Matthew M Coggon, Hanna Lignell, Katherine Ann Schilling, Xuan Zhang, Rebecca H Schwantes, Richard C Flagan, John H Seinfeld, Jesse Lee Beauchamp
The complexation of iron (III) with oxalic acid in aqueous solution yields a strongly absorbing chromophore that undergoes efficient photodissociation to give iron (II) and the carbon dioxide anion radical. Importantly, iron (III) oxalate complexes absorb near-UV radiation (λ > 350 nm), providing a potentially powerful source of oxidants in aqueous tropospheric chemistry. Although this photochemical system has been studied extensively, the mechanistic details associated with its role in the oxidation of dissolved organic matter within aqueous aerosol remain largely unknown...
October 12, 2016: Environmental Science & Technology
Reijiro Nogami, Haruo Nishida, Dang Diem Hong, Minato Wakisaka
A solubility diagram was employed to understand growth promotion of Arthrospira (Spirulina) platensis by steelmaking slag (SMS). The growth promotion effect of 112 % of freshwater microalga A. platensis was obtained using 5 g/L SMS. However, metabolites, such as pigments, and protein content of A. platensis were not significantly affected. Several metals dissolved in Spirulina-Ogawa-Terui medium were detected by inductively coupled plasma atomic emission spectrometry just after the addition of SMS. The solubility diagram provides information on the chemical speciation of metal elements based on pH and concentration...
December 2016: AMB Express
Lavenia Ratnarajah, Andrew R Bowie
Iron limits phytoplankton growth in large areas of the Southern Ocean. A new study shows that Antarctic krill play a crucial role in the recycling of iron in the iron-limited waters.
October 10, 2016: Current Biology: CB
Jaiprakash, Amrita Singhai, Gazala Habib, Ramya Sunder Raman, Tarun Gupta
Fine aerosol fraction (particulate matter with aerodynamic diameter <= 1.0 μm (PM)1.0) over the Indian Institute of Technology Delhi campus was monitored day and night (10 h each) at 30 m height from November 2009 to March 2010. The samples were analyzed for 5 ions (NH4(+), NO3(-), SO4(2-), F(-), and Cl(-)) and 12 trace elements (Na, K, Mg, Ca, Pb, Zn, Fe, Mn, Cu, Cd, Cr, and Ni). Importantly, secondary aerosol (sulfate and nitrate) formation was observed during dense foggy events, supporting the fog-smog-fog cycle...
October 10, 2016: Environmental Science and Pollution Research International
Diane de La Pomélie, Véronique Santé-Lhoutellier, Philippe Gatellier
The reaction of nitrite with different amino acids containing secondary amino groups was tested under simulated in-vitro conditions of the digestive tract. After treatment, tryptophan was the only amino acid that exhibited specific UV absorbance of nitrosamines at 335nm, supporting the assumption that it is the main source of endogenous nitrosamines. The combined effect of pH (from 2 to 6.5) and nitrite (from 0.1 to 20mM) was analyzed and the mechanisms and kinetic laws of tryptophan N-nitrosation were determined...
March 1, 2017: Food Chemistry
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