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https://www.readbyqxmd.com/read/29793208/enhanced-phosphate-removal-from-wastewater-by-using-in-situ-generated-fresh-trivalent-fe-composition-through-the-interaction-of-fe-ii-on-caco-3
#1
Yujie Li, Xiaoman He, Huimin Hu, Tingting Zhang, Jun Qu, Qiwu Zhang
Excessive existences of nutrients such as phosphate in the aqueous environment remain as a heavy concern although many researches have been reported for dealing with their removal. Based on the understanding toward the interactions of Fe compounds with phosphate and carbonate from many available researches, we designed a very simple and efficient approach for phosphate removal by using in situ generated fresh trivalent Fe composition through the interaction of Fe(II) as FeSO4 on CaCO3 . Addition and agitation of Fe(II) and CaCO3 simultaneously to phosphate solution allowed an amorphous Fe(III)-P or Ca-Fe(III)-P precipitation, with a phosphate removal rate close to 100%, to reduce the residual phosphorus concentration less than 0...
May 21, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29793028/cytosolic-distributions-of-highly-toxic-metals-cd-and-tl-and-several-essential-elements-in-the-liver-of-brown-trout-salmo-trutta-l-analyzed-by-size-exclusion-chromatography-and-inductively-coupled-plasma-mass-spectrometry
#2
Zrinka Dragun, Nesrete Krasnići, Nicol Kolar, Vlatka Filipović Marijić, Dušica Ivanković, Marijana Erk
Cytosolic distributions of nonessential metals Cd and Tl and seven essential elements among compounds of different molecular masses were studied in the liver of brown trout (Salmo trutta) from the karstic Krka River in Croatia. Analyses were done by size exclusion high performance liquid chromatography and high resolution inductively coupled plasma mass spectrometry. Common feature of Cd and Tl, as highly toxic elements, was their distribution within only two narrow peaks. The increase of cytosolic Cd concentrations was reflected in marked increase of Cd elution within low molecular mass peak (maximum at ∼15 kDa), presumably containing metallothioneins (MTs), which indicated successful Cd detoxification in brown trout liver under studied exposure conditions...
May 15, 2018: Chemosphere
https://www.readbyqxmd.com/read/29792966/one-step-fabrication-of-chitosan-fe-oh-3-beads-for-efficient-adsorption-of-anionic-dyes
#3
XinxinYang, Yumei Li, Hongmei Gao, Chuying Wang, Xiaohuan Zhang, Hongli Zhou
In this study, we reported the one-step synthesis of chitosan-Fe(OH)3 beads without the use of acid solvent, which could be used as effective adsorbents for anionic dyes removal. The preparation process was easy and green. The as-prepared beads were characterized for structural and morphological analysis in detail using several techniques, such as Scanning Electron Microscope, Fourier Transform Infrared Spectroscopy, X-Ray Diffraction, X-ray photoelectron spectroscopy and Thermogravimetric analysis. The content of Fe(OH)3 in chitosan-Fe(OH)3 beads was 54...
May 21, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29792960/hybrid-chitosan-tio-2-zns-prepared-under-mild-conditions-with-visible-light-driven-photocatalytic-activity
#4
A Jbeli, A M Ferraria, A M Botelho do Rego, S Boufi, S Bouattour
Thin films of chitosan (CS) coated on glass substrates were used as support for the immobilization of nanostructures TiO2 /ZnS via a mild chemical process followed by a hydrothermal treatment at 90 °C. The preparation route involved the coating of the CS film on the glass substrate followed by the deposition of a thin layer of Ti(OBu)4 precursor and immersion in a solution of Zn(O2 CCH3 )2 and Na2 S. After a hydrothermal treatment at 90 °C, an even layer of TiO2 anatase decorated by ZnS nanorods was generated...
May 21, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29791723/functional-and-morphological-recovery-is-incomplete-after-acute-and-acute-recurrent-pancreatitis-in-children
#5
Srikanth Puttaiah Kadyada, Babu Ram Thapa, Karanvir Kaushal, Rama Walia, S V Rana, Narendra Dhaka, Sadhna B Lal, Rajendra Prasad, Subhamoy Das, Rajini Thakur, Kishore Kamal
OBJECTIVE: There is lack of data on functional and morphological recovery after an attack of acute pancreatitis (AP) or acute recurrent pancreatitis (ARP) in children. This study aims to evaluate the functional impairment and morphological changes in the pancreas after recovery. METHODS: All consecutive patients presenting with AP (n=61) or ARP (n=35), as per standard diagnostic criteria were enrolled. After 2 months of pancreatitis, fecal elastase-1(μg/g) and 2-hour oral glucose tolerance test to calculate oral disposition index (DIo )mmol/L-1 (beta cell function) were done...
May 23, 2018: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/29791230/assessing-anxiety-and-depression-in-cancer-patients
#6
Fiona Milligan, Fe Martinez, SohSoha Hassan Mohd Abdel Aal, Samah Abdelrehim Ahmed, Beverly Joby, Jean Sultan Matalam, Sujala Sukumaran Nair, Anthony De Leon Maxion, Safia Sayed, Soji Samson Melepeedikayil
BACKGROUND: empirical evidence suggests that anxiety and depression in cancer patients is underdiagnosed and subsequently this patient population receives little or no support or intervention to address their psychosocial needs. It is often difficult to distinguish between normal emotional distress experienced following a cancer diagnosis and anxiety and depression, which can have a significant impact on coping mechanisms and subsequent outcomes. AIM: a qualitative study using the Hospital Anxiety and Depression Scale (HADS) was undertaken in the National Centre for Cancer Care and Research in Qatar...
May 24, 2018: British Journal of Nursing: BJN
https://www.readbyqxmd.com/read/29790856/surface-terminations-of-hematite-i-%C3%AE-i-fe-sub-2-sub-o-sub-3-sub-exposed-to-oxygen-hydrogen-or-water-dependence-on-the-dft-methodology
#7
Richard Baochang Wang, Anders Hellman
Hematite ($\alpha$-Fe$_2$O$_3$) is the most stable and abundant iron oxide
 in nature, and is used in many important environmental and industrial
 technologies, such as waste-water treatment, gas sensors, and
 photoelectrocatalysis. A clear understanding of
 the structure, composition, and chemistry of the hematite surface 
 is crucial for improving its function in these technologies. The (0001) 
 facet is reported to dominate under natural 
 conditions, while the specific terminations depend strongly on
 preparation conditions...
May 23, 2018: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/29790855/rhombohedral-i-r3c-i-to-orthorhombic-i-pnma-i-phase-transition-induced-by-y-doping-in-bifeo-sub-3-sub
#8
Monica Elisabet Graf, Solange Di Napoli, Maria Andrea Andrea Barral, Leila Saleh Medina, R Martín Negri, Marcelo Sepliarsky, Ana María Llois
In this work we study, by means of <i>ab initio</i> calculations, the structural, electronic and magnetic properties of Y-doped BiFeO<sub>3</sub> compounds. We determine that there is a morphotropic phase boundary at an yttrium concentration of (18 ± 2)%, where the structure changes from <i>R3c</i> to <i>Pnma</i>. This structural transition is driven by the chemical pressure induced by the dopant...
May 23, 2018: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/29790543/a-bi-metallic-mof-catalyst-via-sensitive-detection-adsorption-of-fe-3-ions-for-size-selective-reaction-prompting
#9
Yang Li, Ziling Chang, Fangmin Huang, Pengyan Wu, Huacong Chu, Jian Wang
A cadmium(ii)-based MOF, Cd-MDIP, was successfully prepared by hydrothermal reaction between the tetra-carboxylic ligand 5,5'-methylenebisophthalic acid (H4MDIP) and cadmium perchlorate. The X-ray crystal structure analysis showed that there are two uncoordinated carboxyl groups in each ligand and a 1D elliptical channel along the [001] direction. Because of the existence of uncoordinated carboxyl groups within open frameworks, Cd-MDIP exhibited a high sensitivity (Stern-Volmer constant KSV = 4.13 × 104 L mol-1) and a low detection limit (80 nM) for Fe3+ ions in pure water, which is much lower than the national standard for Fe3+ in daily drinking water (5...
May 23, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29790503/a-voltammetric-method-for-fe-iii-in-blood-serum-using-a-screen-printed-electrode-modified-with-a-schiff-base-ionophore
#10
Susheel K Mittal, Sonia Rana, Navneet Kaur, Craig E Banks
Herein, a potent electrochemical ionophore (SMS-2) based on a Schiff base has been used for the modification of a screen-printed electrode (SPE). The modified disposable electrode can selectively detect ferric ions in an aqueous medium. Redox behavior of the proposed strip was characterized using cyclic voltammetry (CV) and differential pulse voltammetry (DPV). Incorporation of the ligand in the ink of the SPE enhanced the analytical performance of the electrode, and its surface modification was confirmed by SEM and EDX analysis...
May 23, 2018: Analyst
https://www.readbyqxmd.com/read/29789828/unravelling-the-spin-state-of-solvated-fe-bpp-2-2-spin-crossover-complexes-structure-function-relationship
#11
Maria Del Carmen Giménez-López, Miguel Clemente-León, Carlos Giménez-Saiz
This paper reports firstly the syntheses, crystal structures, and thermal and magnetic properties of spin crossover salts of formulae [Fe(bpp)2]3[Cr(CN)6]2·13H2O (1) and [Fe(bpp)2][N(CN)2]2·H2O (2) (bpp = 2,6-bis(pyrazol-3-yl)pyridine) exhibiting hydrogen-bonded networks of low-spin [Fe(bpp)2]2+ complexes and [Cr(CN)6]3- or [N(CN)2]- anions, with solvent molecules located in the voids. Desolvation of 1 is accompanied by a complete low-spin (LS) to a high-spin (HS) transformation that becomes reversible after rehydration by exposing the sample to the humidity of air...
May 23, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29789777/a-normalized-shear-deformation-indicator-for-ultrasound-strain-elastography-in-breast-tissues-an-in-vivo-feasibility-study
#12
Jingfeng Jiang, Bo Peng
The shear deformation under loads contains useful information for distinguishing benign breast lesions from malignant ones. In this study, we proposed a normalized shear deformation indicator (NSDI) that was derived from the concept of principal strains. Since the NSDI requires both high-quality axial and lateral (parallel and perpendicular to the beam, resp.) displacement estimates, a strategy combining high-quality speckle tracking with signal "denoising" was employed. Both techniques were previously published by our group...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29789483/removal-of-crystal-violet-by-using-reduced-graphene-oxide-supported-bimetallic-fe-ni-nanoparticles-rgo-fe-ni-application-of-artificial-intelligence-modeling-for-the-optimization-process
#13
Wenqian Ruan, Jiwei Hu, Jimei Qi, Yu Hou, Rensheng Cao, Xionghui Wei
Reduced-graphene-oxide-supported bimetallic Fe/Ni nanoparticles were synthesized in this study for the removal of crystal violet (CV) dye from aqueous solutions. This material was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDS), Raman spectroscopy, N₂-sorption, and X-ray photoelectron spectroscopy (XPS). The influence of independent parameters (namely, initial dye concentration, initial pH, contact time, and temperature) on the removal efficiency were investigated via Box⁻Behnken design (BBD)...
May 22, 2018: Materials
https://www.readbyqxmd.com/read/29789463/properties-of-ferrite-garnet-bi-lu-y-%C3%A2-fe-ga-%C3%A2-o-12-thin-film-materials-prepared-by-rf-magnetron-sputtering
#14
Mohammad Nur-E-Alam, Mikhail Vasiliev, Vladimir Belotelov, Kamal Alameh
This work is devoted to physical vapor deposition synthesis, and characterisation of bismuth and lutetium-substituted ferrite-garnet thin-film materials for magneto-optic (MO) applications. The properties of garnet thin films sputtered using a target of nominal composition type Bi0.9 Lu1.85 Y0.25 Fe4.0 Ga₁O12 are studied. By measuring the optical transmission spectra at room temperature, the optical constants and the accurate film thicknesses can be evaluated using Swanepoel's envelope method. The refractive index data are found to be matching very closely to these derived from Cauchy's dispersion formula for the entire spectral range between 300 and 2500 nm...
May 22, 2018: Nanomaterials
https://www.readbyqxmd.com/read/29789457/enhanced-catalytic-reduction-of-4-nitrophenol-driven-by-fe%C3%A2-o%C3%A2-au-magnetic-nanocomposite-interface-engineering-from-facile-preparation-to-recyclable-application
#15
Yue Chen, Yuanyuan Zhang, Qiangwei Kou, Yang Liu, Donglai Han, Dandan Wang, Yantao Sun, Yongjun Zhang, Yaxin Wang, Ziyang Lu, Lei Chen, Jinghai Yang, Scott Guozhong Xing
In this work, we report the enhanced catalytic reduction of 4-nitrophenol driven by Fe₃O₄-Au magnetic nanocomposite interface engineering. A facile solvothermal method is employed for Fe₃O₄ hollow microspheres and Fe₃O₄-Au magnetic nanocomposite synthesis via a seed deposition process. Complementary structural, chemical composition and valence state studies validate that the as-obtained samples are formed in a pure magnetite phase. A series of characterizations including conventional scanning/transmission electron microscopy (SEM/TEM), Mössbauer spectroscopy, magnetic testing and elemental mapping is conducted to unveil the structural and physical characteristics of the developed Fe₃O₄-Au magnetic nanocomposites...
May 22, 2018: Nanomaterials
https://www.readbyqxmd.com/read/29789023/iron-supplementation-has-minor-effects-on-gut-microbiota-composition-in-overweight-and-obese-women-in-early-pregnancy
#16
Marloes Dekker Nitert, Luisa F Gomez-Arango, Helen L Barrett, H David McIntyre, Gregory J Anderson, David M Frazer, Leonie K Callaway
Fe is an essential nutrient for many bacteria, and Fe supplementation has been reported to affect the composition of the gut microbiota in both Fe-deficient and Fe-replete individuals outside pregnancy. This study examined whether the dose of Fe in pregnancy multivitamin supplements affects the overall composition of the gut microbiota in overweight and obese pregnant women in early pregnancy. Women participating in the SPRING study with a faecal sample obtained at 16 weeks' gestation were included in this substudy...
May 23, 2018: British Journal of Nutrition
https://www.readbyqxmd.com/read/29787973/mitigation-of-algal-organic-matter-released-from-chaetoceros-affinis-and-hymenomonas-by-in-situ-generated-ferrate
#17
Bhaskar Jyoti Deka, Sanghyun Jeong, S Assiyeh Alizadeh Tabatabai, Alicia Kyoungjin An
This study demonstrates the application of in situ ferrate (Fe(VI)) for the efficient removal of dissolved algal organic matter (AOM) from seawater. Sodium hypochlorite (NaOCl) and ferric (Fe(III)) were used to produce in situ Fe(VI) by wet chemical oxidation. First, the removal efficiencies of two model AOM compounds, humic acid (HA) and sodium alginate (SA), were evaluated in the presence of sodium chloride with an initial influent dissolved organic carbon (DOC) concentration of 5.0 mg C L-1 at different pH levels to establish the optimal doses for in situ Fe(VI) generation...
May 10, 2018: Chemosphere
https://www.readbyqxmd.com/read/29787932/initial-data-on-adsorption-of-cs-and-sr-to-the-surfaces-of-microplastics-with-biofilm
#18
Mathew P Johansen, Emily Prentice, Tom Cresswell, Nick Howell
The adsorption of radiocesium and radiostrontium onto a range of natural materials has been well quantified, but not for the new media of environmental plastics, which may have enhanced adsorption due to surface-weathering and development of biofilms. Microplastic samples were deployed in freshwater, estuarine and marine conditions, then characterised using infrared spectroscopy to document changes to the plastic surface (vs interior). Synchrotron elemental mapping data revealed surfaces that were well-covered by accumulation of reactive water solutes and sulphur, but, in contrast, had highly discrete coverage of elements such as Fe and Ti, indicating adhered mineral/clay-associated agglomerates that may increase overall adsorption capacity...
May 19, 2018: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/29787272/effect-of-ph-and-oxidant-on-the-first-steps-of-polydopamine-formation-a-thermodynamic-approach
#19
Mikko Oskari Salomäki, Lauri Marttila, Henri Kivelä, Tuomo Ouvinen, Jukka Olavi Lukkari
We present a general thermodynamic "top down" analysis of the effect of oxidant and pH on dopamine oxidation and cyclization, supplemented by UV-vis and electrochemical studies. The model is applicable to other catecholamines and various experimental conditions. The results show that the decisive physico-chemical parameters in autoxidation are the pK values of the semiquinone and the amino group in the oxidized quinone. Addition of Ce(IV) or Fe(III) enhances dopamine oxidation in acidic medium in aerobic and anaerobic conditions by direct oxidation of dopamine and, in the presence of oxygen, also by autoxidation of the formed semiquinone...
May 22, 2018: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29786820/determination-of-trace-element-levels-in-patients-with-burst-fractures
#20
Shahab Ahmed Salih Gezh, Abdurrahman Aycan, Halit Demir, Cemal Bozlına
BACKGROUND: This study aimed to determine trace element levels (Zn, Fe, Mn, Mg, Cu, Cd, Co, and Pb) in patients with burst fractures in Van Province, Turkey. METHODS: The study included a total of 44 participants with no additional pathologies, including 22 patients with burst fractures aged over 18 years who were admitted to the neurosurgery departments at two hospitals between June 15, 2015 and January 20, 2016 and 22 healthy volunteers. Serum samples were obtained from all participants to measure the serum levels of trace and heavy elements, including Mn, Cd, Cu, Pb, Fe, Co and Zn, using atomic absorbance spectrophotometry...
May 2018: Ulusal Travma Ve Acil Cerrahi Dergisi, Turkish Journal of Trauma & Emergency Surgery: TJTES
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