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iron preparation

Li Liu, Chien Ho
Mesenchymal stem cells (MSCs) are multipotent cells and are the most widely studied cell type for stem cell therapies. In vivo cell tracking of MSCs labeled with an FDA-approved superparamagnetic iron-oxide (SPIO) particle by magnetic resonance imaging (MRI) provides essential information, e.g., MSC engraftment, survival, and fate, thus improving cell therapy accuracy. However, current methodology for labeling MSCs with Ferumoxytol (Feraheme(®) ), the only FDA-approved SPIO particle, needs transfection agents...
November 15, 2017: Current Protocols in Stem Cell Biology
Judith A Egan, Crist N Filer
The two step synthesis of [(14) C]sodium ferrocyanide decahydrate is described. Ferrous hydroxide was prepared from iron powder and then reacted with [(14) C]sodium cyanide to afford the product. The [(14) C]sodium ferrocyanide decahydrate was characterized by HPLC and (13) C NMR.
November 15, 2017: Journal of Labelled Compounds & Radiopharmaceuticals
Saurabh Mehta, Julia L Finkelstein, Sudha Venkatramanan, Samantha L Huey, Shobha A Udipi, Padmini Ghugre, Caleb Ruth, Richard L Canfield, Anura V Kurpad, Ramesh D Potdar, Jere D Haas
INTRODUCTION: Biofortified crops represent a sustainable agricultural solution for the widespread micronutrient malnutrition in India and other resource-limited settings. This study aims to investigate the effect of the consumption of foods prepared with iron- and zinc-biofortified pearl millet (FeZn-PM) by children on biomarkers of iron and zinc status, growth, and immune function. METHODS AND ANALYSIS: We will conduct a randomised controlled feeding trial in identified slums of Mumbai, India among 200 children aged between 12 and 18 months...
November 14, 2017: BMJ Open
Lucia Cenci, Chiara Piotto, Paolo Bettotti, Alessandra Maria Bossi
Nanosized Molecularly Imprinted Polymers (nanoMIPs) are designed artificial nanoreceptors with a predetermined selectivity and specificity for a given analyte, lately proposed as a replacement to antibodies in immunoassays. The nanoMIP-plate preparation based on nanoparticle adsorption was studied with the aim to rationally identify and discuss the critical points in the nanoMIP-assay development, in an example based on the iron homeostasis biomarker hepcidin and hepcidin-specific nanoMIPs (Kd = 9nM). Plates were prepared by deposition and drying of nanoMIP (0...
February 1, 2018: Talanta
Sichao Feng, Dongxing Yuan, Yongming Huang, Kunning Lin, Yong Zhu, Jian Ma
A sensitive and precise method for determination of nanomolar manganese in seawater was developed, using reverse flow injection analysis, a long path length liquid waveguide capillary cell, and spectrophotometric detection. The reaction was based on manganese catalyzed oxidation of leucomalachite green with sodium periodate. Various experimental parameters were investigated and optimized. Foreign trace metal ions of iron, copper, zinc, nickel and aluminum did not cause obvious interference with manganese detection...
February 1, 2018: Talanta
Hannah Jungeun Lee, Mamdooh Alqathami, Anton Blencowe, Geoffrey S Ibbott
Phototherapy treatment using ultraviolet (UV) A and B light sources has long existed as a treatment option for various skin conditions. Quality control for phototherapy treatment recommended by the British Association of Dermatologists and British Photodermatology Group generally focused on instrumentation-based dosimetry measurements. The purpose of this study was to present an alternative, easily prepared dosimeter system for the measurement of UV dose and as a simple quality assurance technique for phototherapy treatments...
November 14, 2017: Physics in Medicine and Biology
Waziha Farha, A M Abd El-Aty, Md Musfiqur Rahman, Ji Hoon Jeong, Ho-Chul Shin, Jing Wang, Sung Shik Shin, Jae-Han Shim
The category of "leafy vegetables" comprises a wide range of plants, including cabbage, lettuce, leeks, spinach, Swiss chard, and kale, and it forms a significant component of the human diet. Typically, leafy vegetables are low in calories and fat, are great sources of vitamins, protein, dietary fibre, minerals (including iron, calcium, and nitrates), and are rich in phytochemicals. To counter the impact of pests on vegetables, a broad variety of pesticides is used. Because of their large surface areas, leafy vegetables are expected to have high residual pesticide levels...
November 14, 2017: Biomedical Chromatography: BMC
Bonnie T Poulos, Seth G John, Matthew B Sullivan
Viruses influence ecosystem dynamics by modulating microbial host population dynamics, evolutionary trajectories and metabolic outputs. While they are ecologically important across diverse ecosystems, viruses are challenging to study due to minimal biomass often obtained when sampling natural communities. Here we describe a technique using chemical flocculation, filtration and resuspension to recover bacteriophages from seawater and other natural waters. The method uses iron to precipitate viruses which are recovered by filtration onto large-pore size membranes and then resuspended using a buffer containing magnesium and a reductant (ascorbic acid or oxalic acid) at slightly acid pH (6-6...
2018: Methods in Molecular Biology
Robert Seidel, Katrin Kraffert, Anke Kabelitz, Marvin N Pohl, Ralph Kraehnert, Franziska Emmerling, Bernd Winter
The nature of the small iron-oxo oligomers in iron-(iii) aqueous solutions has a determining effect on the chemical processes that govern the formation of nanoparticles in aqueous phase. Here we report on a liquid-jet photoelectron-spectroscopy experiment for the investigation of the electronic structure of the occurring iron-oxo oligomers in FeCl3 aqueous solutions. The only iron species in the as-prepared 0.75 M solution are Fe(3+) monomers. Addition of NaOH initiates Fe(3+) hydrolysis which is followed by the formation of iron-oxo oligomers...
November 13, 2017: Physical Chemistry Chemical Physics: PCCP
Yong Zhao, Jeffrey A Bailey, Jeanne Linden, Patricia St Pierre, Jan Cerny, Michelle Vauthrin, Mindy Greene, Robert Weinstein
Increasing survival of patients with sickle cell anemia (SCA) well into adulthood results in a rising likelihood of developing hematological malignancy. High-dose chemotherapy with autologous hematopoietic progenitor cell (HPC) rescue is standard of care for several hematological malignancies, but the risk of severe or life-threatening vaso-occlusive phenomena during filgrastim mobilization of HPC for collection poses a potential barrier to this approach. We report the use of automated red cell exchange in preparation for filgrastim mobilization in a patient with homozygous SCA...
November 11, 2017: Journal of Clinical Apheresis
Andrew R Garcia, Christopher Lacko, Catherine Snyder, Ana C Bohórquez, Christine E Schmidt, Carlos Rinaldi
Magnetic alginate microspheres are biocompatible due to their alginate matrix, and motion-controllable by applied magnetic fields due to their magnetic character. Therefore, they have the potential of being used as vessels to a broad variety of materials, including drugs and therapeutic agents, facilitating entry to biological systems in a relatively non-invasive manner. Here, magnetic alginate microspheres were prepared through an emulsification and ionic cross-linking process, where a mixture of alginate and iron oxide magnetic nanoparticles was initially dispersed in a continuous phase, followed by gelation of this dispersed phase into microspheres by cross-linking the dispersion with calcium ions...
September 20, 2017: Colloids and Surfaces. A, Physicochemical and Engineering Aspects
Wenhong Gao, Yangping Huang, Ruixue He, Xin-An Zeng
A new ion exchange column method was investigated to synthesize the soluble soybean polysaccharide-iron(III) complex (SSPS-FeIII(1)) using soluble soybean polysaccharides (SSPS). The feasibility of ion exchange column reaction was explored firstly. Results indicated the D730 anion macroporous adsorption resin could effectively absorb SSPS and the static adsorption saturation time was 20h. The iron content of the complex reached up to 15.07% when trisodium citrate concentration was 2mg/mL. The structure of SSPS-FeIII complex synthesized by this method (SSPS-FeIII1(2)) was compared with that prepared by trisodium citrate - ferric chloride method (SSPS-FeIII2(3))...
November 8, 2017: International Journal of Biological Macromolecules
Franziska Roth-Walter, Luis F Pacios, Rodolfo Bianchini, Erika Jensen-Jarolim
Atopic individuals tend to develop a Th2 dominant immune response, resulting in hyperresponsiveness to harmless antigens, termed allergens. In the last decade, epidemiological studies have emerged that connected allergy with a deficient iron-status. Immune activation under iron-deficient conditions results in the expansion of Th2-, but not Th1 cells, can induce class-switching in B-cells and hampers the proper activation of M2, but not M1 macrophages. Moreover, many allergens, in particular with the lipocalin and lipocalin-like folds, seem to be capable of binding iron indirectly via siderophores harboring catechol moieties...
November 9, 2017: Metallomics: Integrated Biometal Science
Federico Spizzo, Paolo Sgarbossa, Elisabetta Sieni, Alessandra Semenzato, Fabrizio Dughiero, Michele Forzan, Roberta Bertani, Lucia Del Bianco
Ferrofluids are nanomaterials consisting of magnetic nanoparticles that are dispersed in a carrier fluid. Their physical properties, and hence their field of application are determined by intertwined compositional, structural, and magnetic characteristics, including interparticle magnetic interactions. Magnetic nanoparticles were prepared by thermal decomposition of iron(III) chloride hexahydrate (FeCl₃·6H₂O) in 2-pyrrolidone, and were then dispersed in two different fluids, water and polyethylene glycol 400 (PEG)...
November 5, 2017: Nanomaterials
Mengge Dong, Xiangxin Xue, Ashok Kumar, He Yang, M I Sayyed, Shan Liu, Erjun Bu
A novel, unconventional, low cost, eco-friendly and effective shielding materials have been made utilizing the hot dip galvanizing slag using the heat waste from itself, thereby saving the natural resources and preventing the environmental pollution. SEM-EDS of shielding materials indicates that the other elements are distributed in Zn element. The mass attenuation properties of shielding materials were measured using a narrow beam geometrical setup at 0.662MeV, 1.17MeV and 1.33MeV. The half value thickness layer, effective atomic number, and electron density were used to analyze the shielding performance of the materials...
November 2, 2017: Journal of Hazardous Materials
Uttam K Das, Stephanie L Daifuku, Theresa E Iannuzzi, Serge I Gorelsky, Ilia Korobkov, Bulat Gabidullin, Michael L Neidig, R Tom Baker
We report an easily prepared bis(thioether) amine ligand, S(Me)N(H)S(Me), along with the synthesis, characterization, and reactivity of the paramagnetic iron(II) bis(amido) complex, [Fe(κ(3)-S(Me)NS(Me))2] (1). Binding of the two different thioethers to Fe generates both five- and six-membered rings with Fe-S bonds in the five-membered rings (av 2.54 Å) being significantly shorter than those in the six-membered rings (av 2.71 Å), suggesting hemilability of the latter thioethers. Consistent with this hypothesis, magnetic circular dichroism (MCD) and computational (TD-DFT) studies indicate that 1 in solution contains a five-coordinate component [Fe(κ(3)-S(Me)NS(Me))(κ(2)-S(Me)NS(Me))] (2)...
November 7, 2017: Inorganic Chemistry
Xin Bo, Yibing Li, Rosalie K Hocking, Chuan Zhao
By introducing chromium into a nickel-iron layered double hydroxide (LDH), a nickel iron chromium hydroxide nanomesh catalyst has been achieved on nickel foam substrate via electrodeposition followed by partially etching of chromium. The electrodeposited chromium acts as sacrificial template to introduce holes in the LDH to increase the electrochemically active surface area and the remaining chromium synergistically modulates the electronic structure of the composite. The obtained electrode shows extraordinary performance for oxygen evolution reaction and excellent electrochemical stability...
November 7, 2017: ACS Applied Materials & Interfaces
Lei Xu, Yongbin Meng, Ying Liu, Qinghuan Meng, Zidong Zhang, Jian Li, Qi Lu
Grifola frondosa polysaccharide-iron (III) complex (GFP-iron) was synthesized and characterized. Based on single factor and orthogonal optimization experiments of GFP-iron (III) complex synthesis, the optimum conditions were the reaction temperature 80°C, pH 8, reaction time 90min and ratio of catalyst to GFP 1:1.0 gg(-1). The iron content of GFP-iron (III) complex reached 24.15% under the optimums and characterized by fourier transform infrared (FTIR), scanning electron microscopy (SEM), X-Ray Diffraction (XRD), thermogravimetry (TG) and iron release in vitro assay...
October 26, 2017: International Journal of Biological Macromolecules
Muhammad Danish, Xiaogang Gu, Shuguang Lu, Mark L Brusseau, Ayyaz Ahmad, Muhammad Naqvi, Usman Farooq, Waqas Qamar Zaman, Xiaori Fu, Zhouwei Miao
Zeolite supported nano iron-nickel bimetallic composite (Z-nZVI-Ni) was prepared using a liquid-phase reduction process. The corresponding surface morphologies and physico-chemical properties of the Z-nZVI-Ni composite were determined using scanning electron microscopy (SEM), transmission electron microscopy (TEM), Energy dispersive X-ray spectra (EDS), Brunauer Emmett Teller (BET) adsorption, wide angle X-ray diffractometry (WA-XRD), and Fourier transform infrared spectroscopy (FTIR). The results indicated high dispersion of iron and nickel nano particles on the zeolite sheet with an enhanced surface area...
February 5, 2017: Applied Catalysis. A, General
Manuel Muñoz, Susana Gómez-Ramírez, Sunil Bhandari
Iron deficiency (ID), with or without anemia, is highly prevalent worldwide and has clinical consequences. The prevention and treatment of ID is a major public health goal. Accurate diagnosis, selection of the appropriate iron replacement therapy and addressing the underlying cause, remain as the main challenges in ID management. Areas covered. This review aims to provide a narrative review of current available evidence on iron supplementation options regularly used to treat ID, including oral and intravenous (IV) iron formulations, with emphasis on safety issues...
November 6, 2017: Expert Opinion on Drug Safety
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