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https://www.readbyqxmd.com/read/28821121/reductive-mineralization-of-cellulose-with-vanadium-iron-and-tungsten-chlorides-and-access-to-mxoy-metal-oxides-and-mxoy-c-metal-oxide-carbon-composites
#1
Aurélien Henry, Peter Hesemann, Johan G Alauzun, Bruno Boury
MxOy and MxOy/C composites (M=V, Fe and W) were obtained by mineralization of cellulose with several metal chlorides. Cellulose was used both as a templating agent and as an oxygen and a carbon source. Soluble chloride molecules (VOCl3 and WCl6) and a poorly soluble ionic chloride compound (FeCl3) were chosen as metal oxide precursors. In a first time, primary metal oxide/cellulose composites were obtained via a thermal treatment by reacting urea impregnated filter paper with the corresponding metal chlorides in an autoclave at 150°C after 3days...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28812189/nutrient-intake-of-swiss-toddlers
#2
Thomas A Brunner, Luca Casetti, Petra Haueter, Pascal Müller, Andreas Nydegger, Johannes Spalinger
PURPOSE: During the first years of life, food preferences are shaped that might last throughout a person's entire life affecting his/her health in the long term. However, knowledge on early feeding habits is still limited for toddlers. Therefore, the goal of the present study was to: (1) assess toddlers' nutrient intake; (2) compare the findings to past studies as well as to national feeding recommendations and (3) identify major food sources for energy and macronutrients. METHODS: A food survey using a 4-day diary was conducted...
August 10, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/28805962/medicago-truncatula-molybdate-transporter-type-1-mtmot1-3-is-a-plasma-membrane-molybdenum-transporter-required-for-nitrogenase-activity-in-root-nodules-under-molybdenum-deficiency
#3
Manuel Tejada-Jiménez, Patricia Gil-Díez, Javier León-Mediavilla, Jiangqi Wen, Kirankumar S Mysore, Juan Imperial, Manuel González-Guerrero
Molybdenum, as a component of the iron-molybdenum cofactor of nitrogenase, is essential for symbiotic nitrogen fixation. This nutrient has to be provided by the host plant through molybdate transporters. Members of the molybdate transporter family Molybdate Transporter type 1 (MOT1) were identified in the model legume Medicago truncatula and their expression in nodules was determined. Yeast toxicity assays, confocal microscopy, and phenotypical characterization of a Transposable Element from Nicotiana tabacum (Tnt1) insertional mutant line were carried out in the one M...
August 14, 2017: New Phytologist
https://www.readbyqxmd.com/read/28805734/grain-foods-are-contributors-of-nutrient-density-for-american-adults-and-help-close-nutrient-recommendation-gaps-data-from-the-national-health-and-nutrition-examination-survey-2009-2012
#4
Yanni Papanikolaou, Victor L Fulgoni
The 2015-2020 Dietary Guidelines for Americans (2015-2020 DGA) maintains recommendations for increased consumption of whole grains while limiting intake of enriched/refined grains. A variety of enriched grains are sources of several shortfall nutrients identified by 2015-2020 DGA, including dietary fiber, folate, iron, and magnesium. The purpose of this study was to determine food sources of energy and nutrients for free-living U.S. adults using data from the National Health and Nutrition Examination Survey, 2009-2012...
August 14, 2017: Nutrients
https://www.readbyqxmd.com/read/28803052/difference-in-attenuation-among-mn-as-and-fe-in-riverbed-sediments
#5
Saikat Sengupta, Ondra Sracek, Jiin-Shuh Jean, Huai-Jen Yang, Chung-Ho Wang, Sandeep Kar, Ondra Babek, Chi-Yuh Lee, Suvendu Das
We report, for the first time, a detailed study at river water and hyporheic zone systems through collection and analyses of shallow sediments and selected source rocks, pore water, and river water from forty-two locations at the Chianan Plain (CP), SW Taiwan. The study was focused to understand the possible changes in the river water and sediment chemistry as a consequence of high arsenic (mean±SD=71.28±16.24μg/L, n=46) groundwater discharge to three major rivers in the plain. The study shows, except few locations, As concentration in river sediments corresponds to average As concentration in soil and upper crustal abundance and of source rock...
July 20, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28799538/local-magnetic-moments-in-iron-and-nickel-at-ambient-and-earth-s-core-conditions
#6
A Hausoel, M Karolak, E Şaşιoğlu, A Lichtenstein, K Held, A Katanin, A Toschi, G Sangiovanni
Some Bravais lattices have a particular geometry that can slow down the motion of Bloch electrons by pre-localization due to the band-structure properties. Another known source of electronic localization in solids is the Coulomb repulsion in partially filled d or f orbitals, which leads to the formation of local magnetic moments. The combination of these two effects is usually considered of little relevance to strongly correlated materials. Here we show that it represents, instead, the underlying physical mechanism in two of the most important ferromagnets: nickel and iron...
July 12, 2017: Nature Communications
https://www.readbyqxmd.com/read/28797738/tissue-magnetic-susceptibility-mapping-as-a-marker-of-tau-pathology-in-alzheimer-s-disease
#7
J O'Callaghan, H Holmes, N Powell, J A Wells, O Ismail, I F Harrison, B Siow, R Johnson, Z Ahmed, A Fisher, S Meftah, M J O'Neill, T K Murray, E C Collins, K Shmueli, M F Lythgoe
Alzheimer's disease is connected to a number of other neurodegenerative conditions, known collectively as 'tauopathies', by the presence of aggregated tau protein in the brain. Neuroinflammation and oxidative stress in AD are associated with tau pathology and both the breakdown of axonal sheaths in white matter tracts and excess iron accumulation grey matter brain regions. Despite the identification of myelin and iron concentration as major sources of contrast in quantitative susceptibility maps of the brain, the sensitivity of this technique to tau pathology has yet to be explored...
August 4, 2017: NeuroImage
https://www.readbyqxmd.com/read/28792432/a-unique-3d-nitrogen-doped-carbon-composite-as-high-performance-oxygen-reduction-catalyst
#8
Ramesh Karunagaran, Tran Thanh Tung, Cameron Shearer, Diana Tran, Campbell Coghlan, Christian Doonan, Dusan Losic
The synthesis and properties of an oxygen reduction catalyst based on a unique 3-dimensional (3D) nitrogen doped (N-doped) carbon composite are described. The composite material is synthesised via a two-step hydrothermal and pyrolysis method using bio-source low-cost materials of galactose and melamine. Firstly, the use of iron salts and galactose to hydrothermally produceiron oxide (Fe₂O₃) magnetic nanoparticle clusters embedded carbon spheres. Secondly, magnetic nanoparticles diffused out of the carbon sphere when pyrolysed in the presence of melamine as nitrogen precursor...
August 9, 2017: Materials
https://www.readbyqxmd.com/read/28782972/-perplexed-in-the-extreme-the-holt-james-controversy-of-1902
#9
Edward J Vinski
Although William James never again reprised his lectures on psychology for teachers at Harvard, he spent most of the 1890s presenting them throughout the country. For all his complaints about them, this was a fine source of income and he used the opportunity to revise and refine them over the rest of the decade. By the end of the 1890s, he was prepared to put the talks down in book form, and turned to his long-time publisher, Henry Holt. The two men first became acquainted with each other when James agreed to write a volume for Holt's American Science series...
August 2017: History of Psychology
https://www.readbyqxmd.com/read/28780484/expression-of-hepcidin-and-ferroportin-in-full-term-placenta-of-pregnant-cows
#10
Sante Roperto, Valeria Russo, Chiara Urraro, Anna Cutarelli, Antonella Perillo, Francesca De Falco, Franco Roperto
Hepcidin (HEP) and ferroportin (FPN) play a central role in systemic iron homeostasis. The HEP/FPN axis controls both extracellular iron concentration and total body iron levels. HEP is synthesized mainly by hepatocytes and controls the absorption of dietary iron and the distribution of iron to the various cell types; its synthesis is regulated by both iron and innate immunity. FPN is a membrane protein and the major exporter of iron from mammalian cells, including iron recycling macrophages, iron absorbing duodenal enterocytes, and iron storing hepatocytes...
July 27, 2017: Theriogenology
https://www.readbyqxmd.com/read/28780358/formation-reactivity-and-aging-of-amorphous-ferric-oxides-in-the-presence-of-model-and-membrane-bioreactor-derived-organics
#11
Mark W Bligh, Pradeep Maheshwari, T David Waite
Iron salts are routinely dosed in wastewater treatment as a means of achieving effluent phosphorous concentration goals. The iron oxides that result from addition of iron salts partake in various reactions, including reductive dissolution and phosphate adsorption. The reactivity of these oxides is controlled by the conditions of formation and the processes, such as aggregation, that lead to a reduction in accessible surface sites following formation. The presence of organic compounds is expected to significantly impact these processes in a number of ways...
July 31, 2017: Water Research
https://www.readbyqxmd.com/read/28772920/surface-modification-of-multi-walled-carbon-nanotubes-via-hemoglobin-derived-iron-and-nitrogen-rich-carbon-nanolayers-for-the-electrocatalysis-of-oxygen-reduction
#12
Wensheng Li, Lingtao Sun, Rong Hu, Wenli Liao, Zhongbin Li, Yanrong Li, Chaozhong Guo
The great challenge of boosting the oxygen reduction reaction (ORR) activity of non-noble-metal electrocatalysts is how to achieve effective exposure and full utilization of nitrogen-rich active sites. To realize the goals of high utilization of active sites and fast electron transport, here we report a new strategy for synthesis of an iron and nitrogen co-doped carbon nanolayers-wrapped multi-walled carbon nanotubes as ORR electrocatalyst (N-C@CNT-Fe) via using partially carbonized hemoglobin as a single-source precursor...
May 20, 2017: Materials
https://www.readbyqxmd.com/read/28771247/clinical-penetrance-in-hereditary-hemochromatosis-estimates-of-the-cumulative-incidence-of-severe-liver-disease-among-hfe-c282y-homozygotes
#13
REVIEW
Scott D Grosse, Lyle C Gurrin, Nadine A Bertalli, Katrina J Allen
Iron overload (hemochromatosis) can cause serious, symptomatic disease that is preventable if detected early and managed appropriately. The leading cause of hemochromatosis in populations of predominantly European ancestry is homozygosity of the C282Y variant in the HFE gene. Screening of adults for iron overload or associated genotypes is controversial, largely because of a belief that severe phenotypes are uncommon, although cascade testing of first-degree relatives of patients is widely endorsed. We contend that severe liver disease (cirrhosis or hepatocellular cancer) is not at all uncommon among older males with hereditary hemochromatosis...
August 3, 2017: Genetics in Medicine: Official Journal of the American College of Medical Genetics
https://www.readbyqxmd.com/read/28771131/comparative-proteomic-profiles-reveal-characteristic-mycobacterium-tuberculosis-proteins-induced-by-cholesterol-during-dormancy-conditions
#14
Lazaro Garcia-Morales, Lizbel Leon-Solis, Irma E Monroy-Muñoz, Moises Talavera-Paulin, Jeanet Serafin-López, Iris Estrada-Garcia, Sandra Rivera-Gutierrez, Jorge F Cerna-Cortes, Addy C Helguera-Repetto, Jorge A Gonzalez-Y-Merchand
Cholesterol has been reported to play an important role during Mycobacterium tuberculosis infection and during its dormant state inside the host. We present the determination of proteomic profiles of M. tuberculosis H37Rv in the presence of cholesterol as the sole carbon source under exponential growth and in two in vitro dormancy phases (NRP1 and NRP2). Using 2D-PAGE, we detected that M. tuberculosis expressed a high diversity of proteins in both exponential and non-replicative phases. We also found that cholesterol was involved in the overexpression of some proteins related to sulfur metabolism (CysA2), electron transport (FixB), cell wall synthesis (Ald), iron storage (BfrB), protein synthesis (Tig and EF-Tu) and dormancy maintenance (HspX and TB 31...
August 4, 2017: Microbiology
https://www.readbyqxmd.com/read/28770431/a-large-scale-investigation-of-the-quality-of-groundwater-in-six-major-districts-of-central-india-during-the-2010-2011-sampling-campaign
#15
Peeyush Khare
This paper investigates the groundwater quality in six major districts of Madhya Pradesh in central India, namely, Balaghat, Chhindwara, Dhar, Jhabua, Mandla, and Seoni during the 2010-2011 sampling campaign, and discusses improvements made in the supplied water quality between the years 2011 and 2017. Groundwater is the main source of water for a combined rural population of over 7 million in these districts. Its contamination could have a huge impact on public health. We analyzed the data collected from a large-scale water sampling campaign carried out by the Public Health Engineering Department (PHED), Government of Madhya Pradesh between 2010 and 2011 during which all rural tube wells and dug wells were sampled in these six districts...
September 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28768482/comparative-genomic-analysis-and-characterization-of-incompatibility-group-fib-plasmid-encoded-virulence-factors-of-salmonella-enterica-isolated-from-food-sources
#16
Bijay K Khajanchi, Nur A Hasan, Seon Young Choi, Jing Han, Shaohua Zhao, Rita R Colwell, Carl E Cerniglia, Steven L Foley
BACKGROUND: The degree to which the chromosomal mediated iron acquisition system contributes to virulence of many bacterial pathogens is well defined. However, the functional roles of plasmid encoded iron acquisition systems, specifically Sit and aerobactin, have yet to be determined for Salmonella spp. In a recent study, Salmonella enterica strains isolated from different food sources were sequenced on the Illumina MiSeq platform and found to harbor the incompatibility group (Inc) FIB plasmid...
August 2, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28767230/mechanistically-driven-development-of-an-iron-catalyst-for-selective-syn-dihydroxylation-of-alkenes-with-aqueous-hydrogen-peroxide
#17
Margarida Borrell, Miquel Costas
Product release is the rate determining step in the arene syn-dihydroxylation reaction taking place at Rieske oxygenase enzymes, and is regarded as a difficult prob-lem to be resolved in the design of iron catalysts for olefin syn-dihydroxylation with potential utility in or-ganic synthesis. Towards this end, in this work a novel catalyst bearing a sterically encumbered tetradentate ligand based in the tpa (tpa = tris-(2-methylpyridyl)amine scaffold, [FeII(CF3SO3)2(5-tips3tpa)], 1 has been designed. The steric demand of the ligand was envisioned as a key element to support a high cata-lytic activity by isolating the metal center, preventing bimolecular decomposition paths, and facilitating prod-uct release...
August 2, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28764025/variability-in-iron-zinc-and-phytic-acid-content-in-a-worldwide-collection-of-commercial-durum-wheat-cultivars-and-the-effect-of-reduced-irrigation-on-these-traits
#18
Ana María Magallanes-López, Nayeli Hernandez-Espinosa, Govindan Velu, Gabriel Posadas-Romano, Virginia María Guadalupe Ordoñez-Villegas, José Crossa, Karim Ammar, Carlos Guzmán
Diets very rich in cereals have been associated with micronutrient malnutrition, and the biofortification of them, has been proposed as one of the best approaches to alleviate the problem. Durum wheat is one of the main sources of calories and protein in many developing countries. In this study, 46 durum varieties grown under full and reduced irrigation, were analyzed for micronutrients and phytate content to determine the potential bioavailability of the micronutrients. The variation was 25.7-40.5mg/kg for iron and of 24...
December 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28761572/a-case-of-severe-iron-deficiency-anemia-associated-with-long-term-proton-pump-inhibitor-use
#19
REVIEW
David N Dado, Erin B Loesch, Sudha P Jaganathan
The use of proton pump inhibitors (PPIs) in the treatment of gastrointestinal diseases has evolved over recent years. Initially intended for short-term use, PPIs are increasingly being used, often inappropriately, as long-term maintenance medications. The mechanism of action of PPIs is suppression of gastric basal and stimulated acid secretion by inhibiting the parietal cell H(+)/K(+) ATP pump with a resultant increase in gastric pH and hypo- or achlorhydria. Although short-term use is related to few adverse effects, long-term use is associated with numerous complications...
2017: Current Therapeutic Research, Clinical and Experimental
https://www.readbyqxmd.com/read/28760418/energy-and-nutrient-intake-of-infants-and-young-children-in-pastoralist-communities-of-ethiopia
#20
Girma Mengistu, Tibebu Moges, Aregash Samuel, Kaleab Baye
OBJECTIVE: Nutrient intake from complementary foods often is suboptimal in subsistent farming households of developing countries, but little is known about this in pastoralist communities. The aim of this study was to estimate the energy and nutrient intake of children ages 6 to 23 mo living in pastoralist communities of Ethiopia. METHOD: As part of the Ethiopian National Food Consumption Survey, 24-h dietary recall data were collected through in-home interviews from a nationally representative sample...
September 2017: Nutrition
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