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https://www.readbyqxmd.com/read/28214583/remediation-of-fluoride-from-drinking-water-using-magnetic-iron-oxide-coated-hydrotalcite-chitosan-composite
#1
Kalimuthu Pandi, Soodamani Periyasamy, Natrayasamy Viswanathan
The present study was performed to examine the probability of magnetic iron oxide fabricated hydrotalcite/chitosan (Fe3O4@HTCS) composite for the removal of excess fluoride content from drinking water. The developed Fe3O4@HTCS composite not only demonstrate the good separation ability but also display an extreme enhanced defluoridation capacity (DC) when compared to other base components and composite. The DCs of Fe3O4@HTCS composite, Fe3O4@HT composite, Fe3O4, HT and CS was found to be 5032, 3041, 1050, 1030 and 52 mgF(-)/kg respectively...
February 15, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28212635/impact-of-semi-solid-formulations-on-skin-penetration-of-iron-oxide-nanoparticles
#2
Umberto M Musazzi, Benedetta Santini, Francesca Selmin, Valentina Marini, Fabio Corsi, Raffaele Allevi, Anna M Ferretti, Davide Prosperi, Francesco Cilurzo, Miriam Colombo, Paola Minghetti
BACKGROUND: This work aimed to provide useful information on the incidence of the choice of formulation in semi-solid preparations of iron-oxide nanoparticles (IONs). The appropriate analytical methods to assess the IONs physical stability and the effect of the semi-solid preparations on IONs human skin penetration were discussed. The physical stability of IONs (Dh = 31 ± 4 nm; ζ = -65 ± 5 mV) loaded in five semi-solid preparations (0.3% w/v), namely Carbopol gel (CP), hydroxyethyl cellulose gel (HEC), carboxymethylcellulose gel (CMC), cetomacrogol cream (Cet) and cold cream was assessed by combining DLS and low-field pulsed NMR data...
February 17, 2017: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/28202542/m%C3%A3-ssbauer-spectra-of-mouse-hearts-reveal-age-dependent-changes-in-mitochondrial-and-ferritin-iron-levels
#3
Joshua D Wofford, Mrinmoy Chakrabarti, Paul Alan Lindahl
Cardiac function requires continuous high levels of energy, and so iron, a critical player in mitochondrial respiration, is an important component of the heart. Hearts from (57)Fe-enriched mice were evaluated by Mossbauer spectroscopy. Spectra consisted of a sextet and two quadrupole doublets. One doublet was due to residual blood while the other was due to [Fe4S4](2+) clusters and Fe(II) hemes, most of which were associated with mitochondrial respiration. The sextet was due to ferritin; there was no evidence of hemosiderin, a ferritin decomposition product...
February 15, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28199100/complexes-of-magnetic-nanoparticles-with-cellulose-nanocrystals-as-regenerable-highly-efficient-and-selective-platform-for-protein-separation
#4
Jiaqi Guo, Ilari Filpponen, Leena-Sisko Johansson, Pezhman Mohammadi, Mika Latikka, Markus B Linder, Robin H A Ras, Orlando J Rojas
We present an efficient approach to synthesize cellulose nanocrystal (CNC) hybrids with magnetically responsive Fe3O4 nanoparticles that were synthesized using the (Fe3+/Fe2+) co-precipitation. After TEMPO-catalyzed oxidation of CNC, carbodiimide (EDC/NHS) was used for coupling amine-containing iron oxide nanoparticles that were achieved by dopamine ligand exchange (NH2-Fe3O4 NPs). The as prepared hybrids (Fe3O4@CNC) were further complexed with Cu(II) ions to produce specific protein binding sites. The performance of magnetically responsive Cu-Fe3O4@CNC hybrid was assessed by selectively separating lysozyme from aqueous media...
February 15, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28197411/toxicity-studies-of-ethyl-maltol-and-iron-complexes-in-mice
#5
Zhen Li, Jieli Lu, Chonghui Wu, Quanhai Pang, Zhiwei Zhu, Ruipeng Nan, Ruochen Du, Jia Chen
Ethyl maltol and iron complexes are products of ethyl maltol and the iron found in the cooking pots used to prepare the Chinese dish, hot-pot. Because their safety is undocumented, the toxicity study of ethyl maltol and iron complexes was conducted in male and female Kunming (KM) mice. The animal study was designed based on the preliminary study conducted to determine the median lethal dose (LD50). The doses used in the study were 0, 1/81, 1/27, 1/9, and 1/3 of the LD50 (mg kg body weight (BW)(-1) day(-1)) dissolved in the water...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28195692/size-controlled-pd-nanoparticle-catalysts-prepared-by-galvanic-displacement-into-a-porous-si-iron-oxide-nanoparticle-host
#6
Taeho Kim, Xin Fu, David Warther, Michael J Sailor
Porous silicon nanoparticles containing both Pd and iron oxide nanoparticles are prepared and studied as magnetically recoverable catalysts for organic reductions. The Pd nanoparticles are generated in situ by electroless deposition of Pd(NH3)4(2+), where the porous Si skeleton acts as both a template and as a reducing agent and the released ammonia ligands raise the local pH to exert control over the size of the Pd nanoparticles. The nanocomposites are characterized by transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), nitrogen adsorption, X-ray diffraction (XRD), superconducting quantum interference device (SQUID) magnetization, and dynamic light scattering (DLS)...
February 14, 2017: ACS Nano
https://www.readbyqxmd.com/read/28195426/magnetic-n-doped-mesoporous-carbon-as-an-adsorbent-for-the-magnetic-solid-phase-extraction-of-phthalate-esters-from-soft-drinks
#7
Menghua Li, Caina Jiao, Xiumin Yang, Chun Wang, Qiuhua Wu, Zhi Wang
A new kind of magnetic N-doped mesoporous carbon was facilely prepared by one-step carbonizing a hybrid precursor (glucose, melamine and iron chloride) in a N2 atmosphere with eutectic salt (KCl/ZnCl2 ) as the porogen. The obtained magnetic N-doped mesoporous carbon showed excellent characteristics, such as strong magnetic response, high surface area, large pore volume, and abundant π-electron system, which endow it with a great potential as a magnetic solid phase extraction adsorbent. To evaluate its adsorption performance, the magnetic N-doped mesoporous carbon was used for the extraction of three phthalate esters from soft drink samples followed by high performance liquid chromatographic analysis...
February 13, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28195425/carbon-nanotubes-disrupt-iron-homeostasis-and-induce-anemia-of-inflammation-through-inflammatory-pathway-as-a-secondary-effect-distant-to-their-portal-of-entry
#8
Juan Ma, Ruibin Li, Yin Liu, Guangbo Qu, Jing Liu, Wenli Guo, Haoyang Song, Xinghong Li, Yajun Liu, Tian Xia, Bing Yan, Sijin Liu
Although numerous toxicological studies have been performed on carbon nanotubes (CNTs), a few studies have investigated their secondary and indirect effects beyond the primary target tissues/organs. Here, a cascade of events are investigated: the initiating event and the subsequent key events necessary for the development of phenotypes, namely CNT-induced pro-inflammatory effects on iron homeostasis and red blood cell formation, which are linked to anemia of inflammation (AI). A panel of CNTs are prepared including pristine multiwall CNTs (P-MWCNTs), aminated MWCNTs (MWCNTs-NH2 ), polyethylene glycol MWCNTs (MWCNTs-PEG), polyethyleneimine MWCNTs (MWCNTs-PEI), and carboxylated MWCNTs (MWCNTs-COOH)...
February 13, 2017: Small
https://www.readbyqxmd.com/read/28193844/heme-assimilation-in-schizosaccharomyces-pombe-requires-cell-surface-anchored-protein-shu1-and-vacuolar-transporter-abc3
#9
Thierry Mourer, Vincent Normant, Simon Labbe
The Schizosaccharomyces pombe shu1(+) gene encodes a cell-surface protein required for assimilation of exogenous heme. In this study, shaving experiments showed that Shu1 is released from membrane preparations when spheroplast lysates are incubated with phosphoinositide-specific phospholipase C (PI-PLC). Shu1 cleavability by PI-PLC and its predicted hydropathy profile strongly suggested that Shu1 is a glycosylphosphatidyl inositol-anchored protein. When heme biosynthesis is selectively blocked in hem1Δ mutant cells, the heme analog zinc mesoporphyrin IX (ZnMP) first accumulates into vacuoles and then subsequently, within the cytoplasm in a rapid and Shu1-dependent manner...
February 13, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28193002/organic-cyanide-decorated-sers-active-nanopipettes-for-quantitative-detection-of-hemeproteins-and-fe-3-in-single-cells
#10
Sumaira Hanif, Hailing Liu, Ming Chen, Pir Muhammad, Yue Zhou, Jiao Cao, Saud Asif Ahmed, Jingjuan Xu, Xinghua Xia, Hongyuan Chen, Kang Wang
It is challenging to develop a robust nanoprobe for real-time operational and accurate detection of heavy metals in single cells. Fe-CN coordination chemistry has been well studied to determine the structural characteristics of hemeproteins by different techniques. However, the frequently used cyanide ligands are inorganic molecules that release cyanide anion under particular conditions and cause cyanide poisoning. In the present study, organic cyanide (4-mercaptobenzonitrile, MBN) was utilized for the first time in developing a facile nanoprobe based on surface-enhanced Raman scattering (SERS) for quantitative detection of hemeproteins (oxy-Hb) and trivalent iron (Fe(3+)) ions...
February 7, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28192365/zero-valent-metal-loaded-silica-nanoparticles-for-the-removal-of-tnt-from-water
#11
Harsha Mangal, Amit Saxena, Nivedita Shukla, P K Rai, A S Rawat, Vivek Kumar, Vatsana Gupta, Monika Datta
Silica nanoparticles with a surface area of 673.60 m(2)/g and particle size of 8-12 nm were prepared using aerogel process (AP) followed by super critical drying. Zero valent Fe, Co, Pt, and bimetallic Fe/Pt and Fe/Co were loaded using an incipient wetness impregnation technique and subsequent reduction. Scanning electron microscopy-energy dispersive X-ray (SEM-EDX) and transmission electron microscopy-energy dispersive X-ray (TEM-EDX) characterizations indicated fine dispersion of iron on AP-SiO2 +Fe system...
February 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28192360/selective-fenton-like-oxidation-of-methylene-blue-on-modified-fe-zeolites-prepared-via-molecular-imprinting-technique
#12
Yuanyuan Zhang, Jiaobo Shang, Yanqun Song, Chuan Rong, Yinghui Wang, Wenyu Huang, Kefu Yu
A facile strategy to increase the selectivity of heterogeneous Fenton oxidation is investigated. The increase was reached by increasing selective adsorption of heterogeneous Fenton catalyst to a target pollutant. The heterogeneous Fenton catalyst was prepared by a two-step process. First, zeolite particles were imprinted by the target pollutant, methylene blue (MB), in their aggregations, and second, iron ions were loaded on the zeolite aggregations to form the molecule imprinted Fe-zeolites (MI-FZ) Fenton catalyst...
February 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28192283/economically-attractive-route-for-the-preparation-of-high-quality-magnetic-nanoparticles-by-the-thermal-decomposition-of-iron-iii-acetylacetonate
#13
Fernando B Effenberger, Ricardo A Couto, Pedro K Kiyohara, Giovanna Machado, Sueli H Masunaga, Renato F Jardim, Liane M Rossi
The thermal decomposition (TD) methods are among the most successful in obtaining magnetic nanoparticles with a high degree of control of size and narrow particle size distribution. Here we investigated the TD of iron(III) acetylacetonate in the presence of oleic acid, oleylamine, and a series of alcohols in order to disclose their role and also investigate economically attractive alternatives for the synthesis of iron oxide nanoparticles without compromising their size and shape control. We have found that some affordable and reasonably less priced alcohols, such as 1,2-octanediol and cyclohexanol, may replace the commonly used and expensive 1,2-hexadecanediol, providing an economically attractive route for the synthesis of high quality magnetic nanoparticles...
February 13, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28189044/preparation-and-evaluation-of-aptes-peg-coated-iron-oxide-nanoparticles-conjugated-to-rhenium-188-labeled-rituximab
#14
Bakhtiar Azadbakht, Hossein Afarideh, Mohammad Ghannadi-Maragheh, Ali Bahrami-Samani, Mehdi Asgari
Radioimmuno-conjugated (Rhenium-188 labeled Rituximab), 3-aminopropyltriethoxysilane (APTES)-polyethylene glycol (PEG) coated iron oxide nanoparticles were synthesized and then characterized. Therapeutic effect and targeting efficacy of complex were evaluated in CD20 express B cell lines and tumor bearing Balb/c mice respectively. To reach these purposes, superparamagnetic iron oxide nanoparticles (SPIONs) were synthesized using coprecipitation method and then their surface was treated with APTES for increasing retention time of SPIONs in blood circulation and amine group creation...
May 6, 2016: Nuclear Medicine and Biology
https://www.readbyqxmd.com/read/28185176/effect-of-coexisting-components-on-phosphate-adsorption-using-magnetite-particles-in-water
#15
Won-Hee Lee, Jong-Oh Kim
In this study, we focused on the rate of adsorption of phosphate on to the surface of magnetite in the presence of coexisting anions, organic matters and heavy metals. Magnetite particles were prepared using a co-precipitation method. Iron (II) sulfate heptahydrate and iron (III) chloride hexahydrate were mixed and then a sodium hydroxide solution was added drop-wise in the mixed iron solution. Coexisting anions were found to have no effect on the decrease in phosphate adsorption. However, phosphate adsorbed on to magnetite surface decreased with increasing total organic carbon (TOC) concentration of natural organic matter (NOM) such as citric, oxalic, and humic acid...
February 9, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28179968/the-effectiveness-of-a-liver-disease-education-class-for-providing-information-to-patients-and-their-families
#16
Yukio Kadokawa, Kazuhiro Katayama, Kozo Takahashi, Nobuhisa Fukushima, Setsu Tanaka, Yuko Taniguchi, Takatoshi Nawa, Mitsuru Sakakibara, Kazuyoshi Ohkawa
BACKGROUND: We have been conducting liver disease education classes regularly in our hospital for the purpose of providing health information to patients and their families. METHODS: In order to evaluate the effectiveness of these classes, we conducted a questionnaire survey of patients and family members who attended the classes held three times in 2012. The cumulative total number of participants was 80 (49 patients, 26 family members, and five others). The classes focused on the following areas: 1) prevention of hepatic cancer; 2) treatment of hepatic cancer; 3) iron restriction diet for hepatitis C patients; and 4) importance of branched-chain amino acid preparations...
March 2017: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/28177256/synthesis-structure-and-magnetic-electrochemical-properties-of-a-family-of-tungstoarsenates-containing-just-co-ii-centers-or-both-co-ii-and-fe-iii-centers
#17
Charyle S Ayingone Mezui, Pedro de Oliveira, Anne-Lucie Teillout, Jérôme Marrot, Patrick Berthet, Mounim Lebrini, Israël M Mbomekallé
The three polyoxotungstates [(NaOH2)2Co(II)2(As2W15O56)2](18-) (1), [(NaOH2)(Co(II)OH2)Co(II)2(As2W15O56)2](17-) (2), and [(Co(II)OH2)2Co(II)2(As2W15O56)2](16-) (3) have been prepared in aqueous solution upon mixing cobalt(II) salts with the ligand [As2W15O56](12-). The reaction of 1 or 2 with the Fe(3+) ion leads invariably to the same species [(Fe(III)OH2)(Co(II)OH2)Co(II)2(As2W15O56)2](15-) (4) possessing three cobalt atoms and a single iron atom. However, if the Fe-containing homologue of compound 1, that is, the polyoxotungstate [(NaOH2)2Fe(III)2(As2W15O56)2](16-) (5), is employed instead to react with the Co(2+) ion, the species [(Co(II)OH2)2Fe(III)2(As2W15O56)2](14-) (6) is obtained, having two cobalt atoms and two iron atoms...
February 20, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28176191/thin-chitosan-films-containing-super-paramagnetic-nanoparticles-with-contrasting-capability-in-magnetic-resonance-imaging
#18
Fatemeh Farjadian, Sahar Moradi, Majid Hosseini
Magnetic nanoparticles have found application as MRI contrasting agents. Herein, chitosan thin films containing super-paramagnetic iron oxide nanoparticles (SPIONs) are evaluated in magnetic resonance imaging (MRI). To determine their contrasting capability, super-paramagnetic nanoparticles coated with citrate (SPIONs-cit) were synthesized. Then, chitosan thin films with different concentrations of SPIONs-cit were prepared and their MRI data (i.e., r 2 and r 2*) was evaluated in an aqueous medium. The synthesized SPIONs-cit and chitosan/SPIONs-cit films were characterized by FTIR, EDX, XRD as well as VSM with the morphology evaluated by SEM and AFM...
March 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28170144/atomic-layer-deposition-of-iron-sulfide-and-its-application-as-a-catalyst-in-the-hydrogenation-of-azobenzenes
#19
Youdong Shao, Zheng Guo, Hao Li, Yantao Su, Xinwei Wang
The atomic layer deposition (ALD) of iron sulfide (FeSx ) is reported for the first time. The deposition process employs bis(N,N'-di-tert-butylacetamidinato)iron(II) and H2 S as the reactants and produces fairly pure, smooth, and well-crystallized FeSx thin films following an ideal self-limiting ALD growth behavior. The FeSx films can be uniformly and conformally deposited into deep narrow trenches with aspect ratios as high as 10:1, which highlights the broad applicability of this ALD process for engineering the surface of complex 3D nanostructures in general...
February 7, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28167448/lessons-to-be-learned-from-a-contentious-challenge-to-mainstream-radiobiological-science-the-linear-no-threshold-theory-of-genetic-mutations
#20
Jan Beyea
There are both statistically valid and invalid reasons why scientists with differing default hypotheses can disagree in high-profile situations. Examples can be found in recent correspondence in this journal, which may offer lessons for resolving challenges to mainstream science, particularly when adherents of a minority view attempt to elevate the status of outlier studies and/or claim that self-interest explains the acceptance of the dominant theory. Edward J. Calabrese and I have been debating the historical origins of the linear no-threshold theory (LNT) of carcinogenesis and its use in the regulation of ionizing radiation...
February 4, 2017: Environmental Research
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